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Analog television
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Displaying an image
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Displaying an image
thumb|400px|Raster scanning is performed from left-to-right and top-to-bottom. Once the screen has been scanned, the beam returns to the beginning of the first line.
thumb|right|Close up image of analog color screen
A cathode-ray tube (CRT) television displays an image by scanning a beam of electrons across the screen in a pattern of horizontal lines known as a raster. At the end of each line, the beam returns to the start of the next line; at the end of the last line, the beam returns to the beginning of the first line at the top of the screen. As it passes each point, the intensity of the beam is varied, varying the luminance of that point. A color television system is similar except there are three beams that scan together and an additional signal known as chrominance controls the color of the spot.
When analog television was developed, no affordable technology for storing video signals existed; the luminance signal had to be generated and transmitted at the same time at which it is displayed on the CRT. It was therefore essential to keep the raster scanning in the camera (or other device for producing the signal) in exact synchronization with the scanning in the television.
The physics of the CRT require that a finite time interval be allowed for the spot to move back to the start of the next line (horizontal retrace) or the start of the screen (vertical retrace). The timing of the luminance signal must allow for this.
The human eye has a characteristic called phi phenomenon. Quickly displaying successive scan images creates the illusion of smooth motion. Flickering of the image can be partially solved using a long persistence phosphor coating on the CRT so that successive images fade slowly. However, slow phosphor has the negative side-effect of causing image smearing and blurring when there is rapid on-screen motion occurring.
The maximum frame rate depends on the bandwidth of the electronics and the transmission system, and the number of horizontal scan lines in the image. A frame rate of 25 or 30 hertz is a satisfactory compromise, while the process of interlacing two video fields of the picture per frame is used to build the image. This process doubles the apparent number of video frames per second and further reduces flicker and other defects in transmission.
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Analog television
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Receiving signals
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Receiving signals
The television system for each country will specify a number of television channels within the UHF or VHF frequency ranges. A channel actually consists of two signals: the picture information is transmitted using amplitude modulation on one carrier frequency, and the sound is transmitted with frequency modulation at a frequency at a fixed offset (typically 4.5 to 6 MHz) from the picture signal.
The channel frequencies chosen represent a compromise between allowing enough bandwidth for video (and hence satisfactory picture resolution), and allowing enough channels to be packed into the available frequency band. In practice a technique called vestigial sideband is used to reduce the channel spacing, which would be nearly twice the video bandwidth if pure AM was used.
Signal reception is invariably done via a superheterodyne receiver: the first stage is a tuner which selects a television channel and frequency-shifts it to a fixed intermediate frequency (IF). The signal amplifier performs amplification to the IF stages from the microvolt range to fractions of a volt.
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Analog television
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Extracting the sound
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Extracting the sound
At this point the IF signal consists of a video carrier signal at one frequency and the sound carrier at a fixed offset in frequency. A demodulator recovers the video signal. Also at the output of the same demodulator is a new frequency modulated sound carrier at the offset frequency. In some sets made before 1948, this was filtered out, and the sound IF of about 22 MHz was sent to an FM demodulator to recover the basic sound signal. In newer sets, this new carrier at the offset frequency was allowed to remain as intercarrier sound, and it was sent to an FM demodulator to recover the basic sound signal. One particular advantage of intercarrier sound is that when the front panel fine tuning knob is adjusted, the sound carrier frequency does not change with the tuning, but stays at the above-mentioned offset frequency. Consequently, it is easier to tune the picture without losing the sound.
So the FM sound carrier is then demodulated, amplified, and used to drive a loudspeaker. Until the advent of the NICAM and MTS systems, television sound transmissions were monophonic.
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Analog television
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Structure of a video signal
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Structure of a video signal
The video carrier is demodulated to give a composite video signal containing luminance, chrominance and synchronization signals. The result is identical to the composite video format used by analog video devices such as VCRs or CCTV cameras. To ensure good linearity and thus fidelity, consistent with affordable manufacturing costs of transmitters and receivers, the video carrier is never modulated to the extent that it is shut off altogether. When intercarrier sound was introduced later in 1948, not completely shutting off the carrier had the side effect of allowing intercarrier sound to be economically implemented.
center|alt=Diagram showing video signal amplitude against time.
thumb|400px|NTSC composite video signal (analog)
thumb|400px|right|A waterfall display showing a 20 ms long interlaced PAL frame with high FFT resolution
Each line of the displayed image is transmitted using a signal as shown above. The same basic format (with minor differences mainly related to timing and the encoding of color) is used for PAL, NTSC, and SECAM television systems. A monochrome signal is identical to a color one, with the exception that the elements shown in color in the diagram (the colorburst, and the chrominance signal) are not present.
right|400px|thumb|Portion of a PAL video signal. From left to right: end of a video scan line, front porch, horizontal sync pulse, back porch with colorburst, and beginning of next line
The front porch is a brief (about 1.5 microsecond) period inserted between the end of each transmitted line of picture and the leading edge of the next line's sync pulse. Its purpose was to allow voltage levels to stabilise in older televisions, preventing interference between picture lines. The front porch is the first component of the horizontal blanking interval which also contains the horizontal sync pulse and the back porch.
The back porch is the portion of each scan line between the end (rising edge) of the horizontal sync pulse and the start of active video. It is used to restore the black level (300 mV) reference in analog video. In signal processing terms, it compensates for the fall time and settling time following the sync pulse.
In color television systems such as PAL and NTSC, this period also includes the colorburst signal. In the SECAM system, it contains the reference subcarrier for each consecutive color difference signal in order to set the zero-color reference.
In some professional systems, particularly satellite links between locations, the digital audio is embedded within the line sync pulses of the video signal, to save the cost of renting a second channel. The name for this proprietary system is Sound-in-Syncs.
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Analog television
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Monochrome video signal extraction
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Monochrome video signal extraction
The luminance component of a composite video signal varies between 0 V and approximately 0.7 V above the black level. In the NTSC system, there is a blanking signal level used during the front porch and back porch, and a black signal level 75 mV above it; in PAL and SECAM these are identical.
In a monochrome receiver, the luminance signal is amplified to drive the control grid in the electron gun of the CRT. This changes the intensity of the electron beam and therefore the brightness of the spot being scanned. Brightness and contrast controls determine the DC shift and amplification, respectively.
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Analog television
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Color video signal extraction
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Color video signal extraction
thumb|right|Color bar generator test signal
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Analog television
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U and V signals
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U and V signals
A color signal conveys picture information for each of the red, green, and blue components of an image. However, these are not simply transmitted as three separate signals, because: such a signal would not be compatible with monochrome receivers, an important consideration when color broadcasting was first introduced. It would also occupy three times the bandwidth of existing television, requiring a decrease in the number of television channels available.
Instead, the RGB signals are converted into YUV form, where the Y signal represents the luminance of the colors in the image. Because the rendering of colors in this way is the goal of both monochrome film and television systems, the Y signal is ideal for transmission as the luminance signal. This ensures a monochrome receiver will display a correct picture in black and white, where a given color is reproduced by a shade of gray that correctly reflects how light or dark the original color is.
The U and V signals are color difference signals. The U signal is the difference between the B signal and the Y signal, also known as B minus Y (B-Y), and the V signal is the difference between the R signal and the Y signal, also known as R minus Y (R-Y). The U signal then represents how purplish-blue or its complementary color, yellowish-green, the color is, and the V signal how purplish-red or its complementary, greenish-cyan, it is. The advantage of this scheme is that the U and V signals are zero when the picture has no color content. Since the human eye is more sensitive to detail in luminance than in color, the U and V signals can be transmitted with reduced bandwidth with acceptable results.
In the receiver, a single demodulator can extract an additive combination of U plus V. An example is the X demodulator used in the X/Z demodulation system. In that same system, a second demodulator, the Z demodulator, also extracts an additive combination of U plus V, but in a different ratio. The X and Z color difference signals are further matrixed into three color difference signals, (R-Y), (B-Y), and (G-Y). The combinations of usually two, but sometimes three demodulators were:
In the end, further matrixing of the above color-difference signals c through f yielded the three color-difference signals, (R-Y), (B-Y), and (G-Y).
The R, G, and B signals in the receiver needed for the display device (CRT, Plasma display, or LCD display) are electronically derived by matrixing as follows: R is the additive combination of (R-Y) with Y, G is the additive combination of (G-Y) with Y, and B is the additive combination of (B-Y) with Y. All of this is accomplished electronically. It can be seen that in the combining process, the low-resolution portion of the Y signals cancel out, leaving R, G, and B signals able to render a low-resolution image in full color. However, the higher resolution portions of the Y signals do not cancel out, and so are equally present in R, G, and B, producing the higher-resolution image detail in monochrome, although it appears to the human eye as a full-color and full-resolution picture.
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Analog television
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NTSC and PAL systems
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NTSC and PAL systems
thumb|left|Color signals mixed with the video signal (two horizontal lines in sequence)
In the NTSC and PAL color systems, U and V are transmitted by using quadrature amplitude modulation of a subcarrier. This kind of modulation applies two independent signals to one subcarrier, with the idea that both signals will be recovered independently at the receiving end. For NTSC, the subcarrier is at 3.58 MHz. For the PAL system it is at 4.43 MHz. The subcarrier itself is not included in the modulated signal (suppressed carrier), it is the subcarrier sidebands that carry the U and V information. The usual reason for using suppressed carrier is that it saves on transmitter power. In this application a more important advantage is that the color signal disappears entirely in black and white scenes. The subcarrier is within the bandwidth of the main luminance signal and consequently can cause undesirable artifacts on the picture, all the more noticeable in black and white receivers.
A small sample of the subcarrier, the colorburst, is included in the horizontal blanking portion, which is not visible on the screen. This is necessary to give the receiver a phase reference for the modulated signal. Under quadrature amplitude modulation the modulated chrominance signal changes phase as compared to its subcarrier and also changes amplitude. The chrominance amplitude (when considered together with the Y signal) represents the approximate saturation of a color, and the chrominance phase against the subcarrier reference approximately represents the hue of the color. For particular test colors found in the test color bar pattern, exact amplitudes and phases are sometimes defined for test and troubleshooting purposes only.
Due to the nature of the quadrature amplitude modulation process that created the chrominance signal, at certain times, the signal represents only the U signal, and 70 nanoseconds (NTSC) later, it represents only the V signal. About 70 nanoseconds later still, -U, and another 70 nanoseconds, -V. So to extract U, a synchronous demodulator is utilized, which uses the subcarrier to briefly gate the chroma every 280 nanoseconds, so that the output is only a train of discrete pulses, each having an amplitude that is the same as the original U signal at the corresponding time. In effect, these pulses are discrete-time analog samples of the U signal. The pulses are then low-pass filtered so that the original analog continuous-time U signal is recovered. For V, a 90-degree shifted subcarrier briefly gates the chroma signal every 280 nanoseconds, and the rest of the process is identical to that used for the U signal.
Gating at any other time than those times mentioned above will yield an additive mixture of any two of U, V, -U, or -V. One of these off-axis (that is, of the U and V axis) gating methods is called I/Q demodulation. Another much more popular off-axis scheme was the X/Z demodulation system. Further matrixing recovered the original U and V signals. This scheme was actually the most popular demodulator scheme throughout the 1960s.
The above process uses the subcarrier. But as previously mentioned, it was deleted before transmission, and only the chroma is transmitted. Therefore, the receiver must reconstitute the subcarrier. For this purpose, a short burst of the subcarrier, known as the colorburst, is transmitted during the back porch (re-trace blanking period) of each scan line. A subcarrier oscillator in the receiver locks onto this signal (see phase-locked loop) to achieve a phase reference, resulting in the oscillator producing the reconstituted subcarrier.
thumb|right|Test card showing "Hanover bars" (color banding phase effect) in the PAL-S (simple) signal mode of transmission.
NTSC uses this process unmodified. Unfortunately, this often results in poor color reproduction due to phase errors in the received signal, sometimes caused by multipath but mostly by poor implementation at the studio end. With the advent of solid-state receivers, cable TV, and digital studio equipment for conversion to an over-the-air analog signal, these NTSC problems have been largely fixed, leaving operator error at the studio end as the sole color rendition weakness of the NTSC system. In any case, the PAL D (delay) system mostly corrects these kinds of errors by reversing the phase of the signal on each successive line, and averaging the results over pairs of lines. This process is achieved by the use of a 1H (where H = horizontal scan frequency) duration delay line. Phase shift errors between successive lines are therefore canceled out and the wanted signal amplitude is increased when the two in-phase signals are re-combined.
NTSC is more spectrum efficient than PAL, giving more picture detail for a given bandwidth. This is because sophisticated comb filters in receivers are more effective with NTSC's 4 color frame sequence compared to PAL's 8-field sequence. However, in the end, the larger channel width of most PAL systems in Europe still gives PAL systems the edge in transmitting more picture detail.
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Analog television
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SECAM system
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SECAM system
In the SECAM television system, U and V are transmitted on alternate lines, using simple frequency modulation of two different color subcarriers.
In some analog color CRT displays, starting in 1956, the brightness control signal (luminance) is fed to the cathode connections of the electron guns, and the color difference signals (chrominance signals) are fed to the control grids connections. This simple CRT matrix mixing technique was replaced in later solid state designs of signal processing with the original matrixing method used in the 1954 and 1955 color TV receivers.
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Analog television
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Synchronization
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Synchronization
Synchronizing pulses added to the video signal at the end of every scan line and video frame ensure that the sweep oscillators in the receiver remain locked in step with the transmitted signal so that the image can be reconstructed on the receiver screen.
A sync separator circuit detects the sync voltage levels and sorts the pulses into horizontal and vertical sync.
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Analog television
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Horizontal synchronization
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Horizontal synchronization
The horizontal sync pulse separates the scan lines. The horizontal sync signal is a single short pulse that indicates the start of every line. The rest of the scan line follows, with the signal ranging from 0.3 V (black) to 1 V (white), until the next horizontal or vertical synchronization pulse.
The format of the horizontal sync pulse varies. In the 525-line NTSC system it is a 4.85 μs pulse at 0 V. In the 625-line PAL system the pulse is 4.7 μs at 0 V. This is lower than the amplitude of any video signal (blacker than black) so it can be detected by the level-sensitive sync separator circuit of the receiver.
Two timing intervals are defined – the front porch between the end of the displayed video and the start of the sync pulse, and the back porch after the sync pulse and before the displayed video. These and the sync pulse itself are called the horizontal blanking (or retrace) interval and represent the time that the electron beam in the CRT is returning to the start of the next display line.
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Analog television
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Vertical synchronization
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Vertical synchronization
Vertical synchronization separates the video fields. In PAL and NTSC, the vertical sync pulse occurs within the vertical blanking interval. The vertical sync pulses are made by prolonging the length of horizontal sync pulses through almost the entire length of the scan line.
The vertical sync signal is a series of much longer pulses, indicating the start of a new field. The sync pulses occupy the whole line interval of a number of lines at the beginning and end of a scan; no picture information is transmitted during vertical retrace. The pulse sequence is designed to allow horizontal sync to continue during vertical retrace; it also indicates whether each field represents even or odd lines in interlaced systems (depending on whether it begins at the start of a horizontal line, or midway through).
The format of such a signal in 525-line NTSC is:
pre-equalizing pulses (6 to start scanning odd lines, 5 to start scanning even lines)
long-sync pulses (5 pulses)
post-equalizing pulses (5 to start scanning odd lines, 4 to start scanning even lines)
Each pre- or post-equalizing pulse consists of half a scan line of black signal: 2 μs at 0 V, followed by 30 μs at 0.3 V. Each long sync pulse consists of an equalizing pulse with timings inverted: 30 μs at 0 V, followed by 2 μs at 0.3 V.
In video production and computer graphics, changes to the image are often performed during the vertical blanking interval to avoid visible discontinuity of the image. If this image in the framebuffer is updated with a new image while the display is being refreshed, the display shows a mishmash of both frames, producing page tearing partway down the image.
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Analog television
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Horizontal and vertical hold
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Horizontal and vertical hold
The sweep (or deflection) oscillators were designed to run without a signal from the television station (or VCR, computer, or other composite video source). This allows the television receiver to display a raster and to allow an image to be presented during antenna placement. With sufficient signal strength, the receiver's sync separator circuit would split timebase pulses from the incoming video and use them to reset the horizontal and vertical oscillators at the appropriate time to synchronize with the signal from the station.
The free-running oscillation of the horizontal circuit is especially critical, as the horizontal deflection circuits typically power the flyback transformer (which provides acceleration potential for the CRT) as well as the filaments for the high voltage rectifier tube and sometimes the filament(s) of the CRT itself. Without the operation of the horizontal oscillator and output stages in these television receivers, there would be no illumination of the CRT's face.
The lack of precision timing components in early equipment meant that the timebase circuits occasionally needed manual adjustment. If their free-run frequencies were too far from the actual line and field rates, the circuits would not be able to follow the incoming sync signals. Loss of horizontal synchronization usually resulted in an unwatchable picture; loss of vertical synchronization would produce an image rolling up or down the screen.
Older analog television receivers often provide manual controls to adjust horizontal and vertical timing. The adjustment takes the form of horizontal hold and vertical hold controls, usually on the front panel along with other common controls. These adjust the free-run frequencies of the corresponding timebase oscillators.
A slowly rolling vertical picture demonstrates that the vertical oscillator is nearly synchronized with the television station but is not locking to it, often due to a weak signal or a failure in the sync separator stage not resetting the oscillator.
Horizontal sync errors cause the image to be torn diagonally and repeated across the screen as if it were wrapped around a screw or a barber's pole; the greater the error, the more copies of the image will be seen at once wrapped around the barber pole.
By the early 1980s the efficacy of the synchronization circuits, plus the inherent stability of the sets' oscillators, had been improved to the point where these controls were no longer necessary. Integrated Circuits which eliminated the horizontal hold control were starting to appear as early as 1969.
The final generations of analog television receivers used IC-based designs where the receiver's timebases were derived from accurate crystal oscillators. With these sets, adjustment of the free-running frequency of either sweep oscillator was unnecessary and unavailable.
Horizontal and vertical hold controls were rarely used in CRT-based computer monitors, as the quality and consistency of components were quite high by the advent of the computer age, but might be found on some composite monitors used with the 1970s–80s home or personal computers.
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Analog television
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Other technical information
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Other technical information
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Analog television
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Components of a television system
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Components of a television system
thumb|500px|Block diagram for a typical analog monochrome television receiver|alt=block diagram of a television receiver showing tuner, intermediate frequency amplifier. A demodulator separates sound from video. Video is directed to the CRT and to the synchronizing circuits.
The tuner is the object which, with the aid of an antenna, isolates the television signals received over the air. There are two types of tuners in analog television, VHF and UHF tuners. The VHF tuner selects the VHF television frequency. This consists of a 4 MHz video bandwidth and about 100 kHz audio bandwidth. It then amplifies the signal and converts it to a 45.75 MHz Intermediate Frequency (IF) amplitude-modulated video and a 41.25 MHz IF frequency-modulated audio carrier.
The IF amplifiers are centered at 44 MHz for optimal frequency transference of the audio and video carriers. Like radio, television has automatic gain control (AGC). This controls the gain of the IF amplifier stages and the tuner.
The video amp and output amplifier is implemented using a pentode or a power transistor. The filter and demodulator separates the 45.75 MHz video from the 41.25 MHz audio then it simply uses a diode to detect the video signal. After the video detector, the video is amplified and sent to the sync separator and then to the picture tube.
The audio signal goes to a 4.5 MHz amplifier. This amplifier prepares the signal for the 4.5 MHz detector. It then goes through a 4.5 MHz IF transformer to the detector. In television, there are 2 ways of detecting FM signals. One way is by the ratio detector. This is simple but very hard to align. The next is a relatively simple detector. This is the quadrature detector. It was invented in 1954. The first tube designed for this purpose was the 6BN6 type. It is easy to align and simple in circuitry. It was such a good design that it is still being used today in the Integrated circuit form. After the detector, it goes to the audio amplifier.
Image synchronization is achieved by transmitting negative-going pulses. The horizontal sync signal is a single short pulse that indicates the start of every line. Two-timing intervals are defined – the front porch between the end of the displayed video and the start of the sync pulse, and the back porch after the sync pulse and before the displayed video. These and the sync pulse itself are called the horizontal blanking (or retrace) interval and represent the time that the electron beam in the CRT is returning to the start of the next display line.
The vertical sync signal is a series of much longer pulses, indicating the start of a new field. The vertical sync pulses occupy the whole of line interval of a number of lines at the beginning and end of a scan; no picture information is transmitted during vertical retrace. The pulse sequence is designed to allow horizontal sync to continue during vertical retrace.
A sync separator circuit detects the sync voltage levels and extracts and conditions signals that the horizontal and vertical oscillators can use to keep in sync with the video. It also forms the AGC voltage.
The horizontal and vertical oscillators form the raster on the CRT. They are driven by the sync separator. There are many ways to create these oscillators. The earliest is the thyratron oscillator. Although it is known to drift, it makes a perfect sawtooth wave. This sawtooth wave is so good that no linearity control is needed. This oscillator was designed for the electrostatic deflection CRTs but also found some use in electromagnetically deflected CRTs. The next oscillator developed was the blocking oscillator which uses a transformer to create a sawtooth wave. This was only used for a brief time period and never was very popular. Finally the multivibrator was probably the most successful. It needed more adjustment than the other oscillators, but it is very simple and effective. This oscillator was so popular that it was used from the early 1950s until today.
Two oscillator amplifiers are needed. The vertical amplifier directly drives the yoke. Since it operates at 50 or 60 Hz and drives an electromagnet, it is similar to an audio amplifier. Because of the rapid deflection required, the horizontal oscillator requires a high-power flyback transformer driven by a high-powered tube or transistor. Additional windings on this flyback transformer typically power other parts of the system.
right|250px|thumb|Portion of a PAL videosignal. From left to right: end of a video line, front porch, horizontal sync pulse, back porch with colorburst, and beginning of next line
right|250px|thumb|Beginning of the frame, showing several scan lines; the terminal part of the vertical sync pulse is at the left
right|250px|thumb|PAL video signal frames. Left to right: frame with scan lines (overlapping together, horizontal sync pulses show as the doubled straight horizontal lines), vertical blanking interval with vertical sync (shows as brightness increase of the bottom part of the signal in almost the leftmost part of the vertical blanking interval), entire frame, another VBI with VSYNC, beginning of the third frame
thumb|250px|right|Analyzing a PAL signal and decoding the 20 ms frame and 64 μs lines
Loss of horizontal synchronization usually results in a scrambled and unwatchable picture; loss of vertical synchronization produces an image rolling up or down the screen.
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Analog television
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Timebase circuits
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Timebase circuits
In an analog receiver with a CRT display sync pulses are fed to horizontal and vertical timebase circuits (commonly called sweep circuits in the United States), each consisting of an oscillator and an amplifier. These generate modified sawtooth and parabola current waveforms to scan the electron beam. Engineered waveform shapes are necessary to make up for the distance variations from the electron beam source and the screen surface. The oscillators are designed to free-run at frequencies very close to the field and line rates, but the sync pulses cause them to reset at the beginning of each scan line or field, resulting in the necessary synchronization of the beam sweep with the originating signal. The output waveforms from the timebase amplifiers are fed to the horizontal and vertical deflection coils wrapped around the CRT tube. These coils produce magnetic fields proportional to the changing current, and these deflect the electron beam across the screen.
In the 1950s, the power for these circuits was derived directly from the mains supply. A simple circuit consisted of a series voltage dropper resistance and a rectifier. This avoided the cost of a large high-voltage mains supply (50 or 60 Hz) transformer. It was inefficient and produced a lot of heat.
In the 1960s, semiconductor technology was introduced into timebase circuits. During the late 1960s in the UK, synchronous (with the scan line rate) power generation was introduced into solid state receiver designs.
In the UK use of the simple (50 Hz) types of power, circuits were discontinued as thyristor based switching circuits were introduced. The reason for design changes arose from the electricity supply contamination problems arising from EMI, and supply loading issues due to energy being taken from only the positive half cycle of the mains supply waveform.
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Analog television
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CRT flyback power supply
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CRT flyback power supply
Most of the receiver's circuitry (at least in transistor- or IC-based designs) operates from a comparatively low-voltage DC power supply. However, the anode connection for a cathode-ray tube requires a very high voltage (typically 10–30 kV) for correct operation.
This voltage is not directly produced by the main power supply circuitry; instead, the receiver makes use of the circuitry used for horizontal scanning. Direct current (DC), is switched through the line output transformer, and alternating current (AC) is induced into the scan coils. At the end of each horizontal scan line the magnetic field, which has built up in both transformer and scan coils by the current, is a source of latent electromagnetic energy. This stored collapsing magnetic field energy can be captured. The reverse flow, short duration, (about 10% of the line scan time) current from both the line output transformer and the horizontal scan coil is discharged again into the primary winding of the flyback transformer by the use of a rectifier which blocks this counter-electromotive force. A small value capacitor is connected across the scan-switching device. This tunes the circuit inductances to resonate at a much higher frequency. This lengthens the flyback time from the extremely rapid decay rate that would result if they were electrically isolated during this short period. One of the secondary windings on the flyback transformer then feeds this brief high-voltage pulse to a Cockcroft–Walton generator design voltage multiplier. This produces the required high-voltage supply. A flyback converter is a power supply circuit operating on similar principles.
A typical modern design incorporates the flyback transformer and rectifier circuitry into a single unit with a captive output lead, known as a diode split line output transformer or an Integrated High Voltage Transformer (IHVT), so that all high-voltage parts are enclosed. Earlier designs used a separate line output transformer and a well-insulated high-voltage multiplier unit. The high frequency (15 kHz or so) of the horizontal scanning allows reasonably small components to be used.
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Analog television
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Transition to digital
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Transition to digital
In many countries, over-the-air broadcast television of analog audio and analog video signals has been discontinued to allow the re-use of the television broadcast radio spectrum for other services.
The first country to make a wholesale switch to digital over-the-air (terrestrial television) broadcasting was Luxembourg in 2006, followed later in 2006 by the Netherlands. The Digital television transition in the United States for high-powered transmission was completed on 12 June 2009, the date that the Federal Communications Commission (FCC) set. Almost two million households could no longer watch television because they had not prepared for the transition. The switchover had been delayed by the DTV Delay Act. While the majority of the viewers of over-the-air broadcast television in the U.S. watch full-power stations (which number about 1800), there are three other categories of television stations in the U.S.: low-power broadcasting stations, class A stations, and television translator stations. These were given later deadlines.
In Japan, the switch to digital began in northeastern Ishikawa Prefecture on 24 July 2010 and ended in 43 of the country's 47 prefectures (including the rest of Ishikawa) on 24 July 2011, but in Fukushima, Iwate, and Miyagi prefectures, the conversion was delayed to 31 March 2012, due to complications from the 2011 Tōhoku earthquake and tsunami and its related nuclear accidents.
In Canada, most of the larger cities turned off analog broadcasts on 31 August 2011.
China had scheduled to end analog broadcasting between 2015 and 2021.
Brazil switched to digital television on 2 December 2007 in São Paulo and planned to end analog broadcasting nationwide by 30 June 2016. However, the Ministry of Communications announced in 2012 that the deadline would be delayed. As of 2024, Brazil is in the process of implementing its next-generation digital television system, known as TV 3.0. In July 2024, ATSC 3.0 standard was officially selected for the country's next-generation digital television system. The transition to TV 3.0 is expected to begin in 2025, with initial deployments planned for key cities such as São Paulo, Rio de Janeiro, and Brasília.
In Malaysia, the Malaysian Communications and Multimedia Commission advertised for tender bids to be submitted in the third quarter of 2009 for the 470 through 742 MHz UHF allocation, to enable Malaysia's broadcast system to move into DTV. The new broadcast band allocation would result in Malaysia's having to build an infrastructure for all broadcasters, using a single digital terrestrial television broadcast channel. Large portions of Malaysia are covered by television broadcasts from Singapore, Thailand, Brunei, and Indonesia (from Borneo and Batam). Starting from 1 November 2019, all regions in Malaysia were no longer using the analog system after the states of Sabah and Sarawak finally turned it off on 31 October 2019.
In Singapore, digital television under DVB-T2 began on 16 December 2013. The switchover was delayed many times until analog TV was switched off at midnight on 2 January 2019.
In the Philippines, the National Telecommunications Commission required all broadcasting companies to end analog broadcasting on 31 December 2015 at 11:59 p.m. Due to delay of the release of the implementing rules and regulations for digital television broadcast, the target date was moved to 2020. Full digital broadcast was expected in 2021 and all of the analog TV services were to be shut down by the end of 2023. However, in February 2023, the NTC postponed the ASO/DTV transition to 2025 due to many provincial television stations not being ready to start their digital TV transmissions.
In the Russian Federation, the Russian Television and Radio Broadcasting Network (RTRS) disabled analog broadcasting of federal channels in five stages, shutting down broadcasting in multiple federal subjects at each stage. The first region to have analog broadcasting disabled was Tver Oblast on 3 December 2018, and the switchover was completed on 14 October 2019. During the transition, DVB-T2 receivers and monetary compensations for purchasing of terrestrial or satellite digital TV reception equipment were provided to disabled people, World War II veterans, certain categories of retirees and households with income per member below living wage.
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Analog television
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See also
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See also
Amateur television
Narrow-bandwidth television
Overscan
Slow-scan television
Glossary of video terms
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Analog television
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Notes
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Notes
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Analog television
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References
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References
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Analog television
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External links
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External links
Video signal measurement and generation
Category:Television technology
Category:Television terminology
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Analog television
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Table of Content
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Short description, Development, Standards, Displaying an image, Receiving signals, Extracting the sound, Structure of a video signal, Monochrome video signal extraction, Color video signal extraction, U and V signals, NTSC and PAL systems, SECAM system, Synchronization, Horizontal synchronization, Vertical synchronization, Horizontal and vertical hold, Other technical information, Components of a television system, Timebase circuits, CRT flyback power supply, Transition to digital, See also, Notes, References, External links
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April 11
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short description
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April 11
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Events
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Events
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April 11
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Pre-1600
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Pre-1600
491 – Flavius Anastasius becomes Byzantine emperor, with the name of Anastasius I.;
1241 – Batu Khan defeats Béla IV of Hungary at the Battle of Mohi.
1512 – War of the League of Cambrai: Franco-Ferrarese forces led by Gaston de Foix and Alfonso I d'Este win the Battle of Ravenna against the Papal-Spanish forces.
1544 – Italian War of 1542–46: A French army defeats Habsburg forces at the Battle of Ceresole, but fails to exploit its victory.
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April 11
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1601–1900
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1601–1900
1689 – William III and Mary II are crowned as joint sovereigns of Great Britain on the same day that the Scottish Parliament concurs with the English decision of 12 February.
1713 – France and Great Britain sign the Treaty of Utrecht, bringing an end to the War of the Spanish Succession (Queen Anne's War). Britain accepts Philip V as King of Spain, while Philip renounces any claim to the French throne.
1727 – Premiere of Johann Sebastian Bach's St Matthew Passion BWV 244b at St. Thomas Church in Leipzig, Electorate of Saxony (now Germany).
1809 – Battle of the Basque Roads: Admiral Lord Gambier fails to support Captain Lord Cochrane, leading to an incomplete British victory over the French fleet.; ;
1814 – The Treaty of Fontainebleau ends the War of the Sixth Coalition against Napoleon Bonaparte, and forces him to abdicate unconditionally for the first time.
1856 – Second Battle of Rivas: Juan Santamaría burns down the hostel where William Walker's filibusters are holed up.
1868 – Former shōgun Tokugawa Yoshinobu surrenders Edo Castle to Imperial forces, marking the end of the Tokugawa shogunate.
1876 – The Benevolent and Protective Order of Elks is organized.
1881 – Spelman College is founded in Atlanta, Georgia as the Atlanta Baptist Female Seminary, an institute of higher education for African-American women.
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April 11
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1901–present
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1901–present
1908 – , the last armored cruiser to be built by the Imperial German Navy, is launched.
1909 – The city of Tel Aviv is founded.
1921 – Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.
1935 – Stresa Front: opening of the conference between the British Prime Minister Ramsay MacDonald, the Italian Prime Minister Benito Mussolini and the French Minister for Foreign Affairs Pierre Laval to condemn the German violations of the Treaty of Versailles.
1945 – World War II: American forces liberate the Buchenwald concentration camp.
1951 – Korean War: President Truman relieves Douglas MacArthur of the command of American forces in Korea and Japan.
1951 – The Stone of Scone, the stone upon which Scottish monarchs were traditionally crowned, is found on the site of the altar of Arbroath Abbey. It had been taken by Scottish nationalist students from its place in Westminster Abbey.
1952 – Bolivian National Revolution: Rebels take over Palacio Quemado.
1952 – Pan Am Flight 526A ditches near San Juan-Isla Grande Airport in San Juan, Puerto Rico, after experiencing an engine failure, killing 52 people.
1955 – The Air India Kashmir Princess is bombed and crashes in a failed assassination attempt on Zhou Enlai by the Kuomintang.
1957 – United Kingdom agrees to Singaporean self-rule.
1961 – The trial of Adolf Eichmann begins in Jerusalem.
1963 – Pope John XXIII issues Pacem in terris, the first encyclical addressed to all Christians instead of only Catholics, and which described the conditions for world peace in human terms.
1964 – Brazilian Marshal Humberto de Alencar Castelo Branco is elected president by the National Congress.
1965 – The Palm Sunday tornado outbreak of 1965: Fifty-five tornadoes hit in six Midwestern states of the United States, killing 266 people.
1968 – US President Lyndon B. Johnson signs the Civil Rights Act of 1968, prohibiting discrimination in the sale, rental, and financing of housing.
1968 – A failed assassination attempt on Rudi Dutschke, leader of the German student movement, leaves Dutschke suffering from brain damage.
1970 – Apollo Program: Apollo 13 is launched.
1976 – The Apple I is created.
1977 – London Transport's Silver Jubilee AEC Routemaster buses are launched.
1979 – Ugandan dictator Idi Amin is deposed.
1981 – A massive riot in Brixton, south London results in almost 300 police injuries and 65 serious civilian injuries.
1986 – FBI Miami Shootout: A gun battle in broad daylight in Dade County, Florida between two bank/armored car robbers and pursuing FBI agents. During the firefight, FBI agents Jerry L. Dove and Benjamin P. Grogan were killed, while five other agents were wounded. As a result, the popular .40 S&W cartridge was developed.
1987 – The London Agreement is secretly signed between Israeli Foreign Affairs Minister Shimon Peres and King Hussein of Jordan.
1990 – Customs officers in Middlesbrough, England, seize what they believe to be the barrel of a massive gun on a ship bound for Iraq.
1993 – Four hundred fifty prisoners rioted at the Southern Ohio Correctional Facility in Lucasville, Ohio, and continued to do so for ten days, citing grievances related to prison conditions, as well as the forced vaccination of Nation of Islam prisoners (for tuberculosis) against their religious beliefs.
2001 – The detained crew of a United States EP-3E aircraft that landed in Hainan, China after a collision with a J-8 fighter, is released.
2001 – The Australia national men's soccer team sets a world record for the largest victory in an international association football match, winning the game 31–0 against American Samoa at the 2002 FIFA World Cup qualifiers for OFC. Australia's Archie Thompson also breaks the record for most goals scored by a player in an international match by scoring 13 goals.
2002 – The Ghriba synagogue bombing by al-Qaeda kills 21 in Tunisia.
2002 – Over two hundred thousand people march in Caracas towards the presidential palace to demand the resignation of President Hugo Chávez. Nineteen protesters are killed.
2006 – Iranian president Mahmoud Ahmadinejad announces Iran's claim to have successfully enriched uranium.
2007 – Algiers bombings: Two bombings in Algiers kill 33 people and wound a further 222 others.
2008 – Kata Air Transport Flight 007 crashes while attempting an emergency landing at Chișinău International Airport, killing eight.
2011 – An explosion in the Minsk Metro, Belarus kills 15 people and injures 204 others.
2012 – A pair of great earthquakes occur in the Wharton Basin west of Sumatra in Indonesia. The maximum Mercalli intensity of this strike-slip doublet earthquake is VII (Very strong). Ten are killed, twelve are injured, and a non-destructive tsunami is observed on the island of Nias.
2017 – The tour bus of the German football team Borussia Dortmund was attacked with roadside bombs in Dortmund, Germany. Three bombs exploded as the bus ferried the team to the Westfalenstadion for the first leg of their quarter-final against Monaco.
2018 – An Ilyushin Il-76 which was owned and operated by the Algerian Air Force crashes near Boufarik, Algeria, killing 257.
2021 – Twenty year old Daunte Wright is shot and killed in Brooklyn Center, Minnesota by officer Kimberly Potter, sparking protests in the city, when the officer mistakes her pistol for her taser.
2023 – During the Pazigyi massacre, an airstrike conducted by the Myanmar Air Force kills at least 100 villagers in Pazigyi, Sagaing Region.
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April 11
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Births
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Births
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April 11
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Pre-1600
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Pre-1600
145 – Septimius Severus, Roman emperor (probable; d. 211)
1184 – William of Winchester, Lord of Lüneburg (d. 1213)
1348 – Andronikos IV Palaiologos, Byzantine Emperor (d. 1385)
1357 – John I of Portugal (d. 1433)
1370 – Frederick I, Elector of Saxony (d. 1428)
1374 – Roger Mortimer, 4th Earl of March, heir to the throne of England (d. 1398)
1493 – George I, Duke of Pomerania (d. 1531)
1591 – Bartholomeus Strobel, Silezian painter (d. 1650)
1592 – John Eliot, English lawyer and politician (d. 1632)
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April 11
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1601–1900
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1601–1900
1644 – Marie Jeanne Baptiste of Savoy-Nemours, Duchess of Savoy (d. 1724)
1658 – James Hamilton, 4th Duke of Hamilton, Scottish peer (d. 1712)
1683 – Jean-Joseph Mouret, French composer and conductor (d. 1738)
1715 – John Alcock, English organist and composer (d. 1806)
1721 – David Zeisberger, Czech-American clergyman and missionary (d. 1808)
1722 – Christopher Smart, English actor, playwright, and poet (d. 1771)
1749 – Adélaïde Labille-Guiard, French miniaturist and portrait painter (d. 1803)
1755 – James Parkinson, English surgeon, geologist, and paleontologist (d. 1824)
1770 – George Canning, Irish-English lawyer and politician, Prime Minister of the United Kingdom (d. 1827)
1794 – Edward Everett, English-American educator and politician, 15th Governor of Massachusetts (d. 1865)
1798 – Macedonio Melloni, Italian physicist and academic (d. 1854)
1819 – Charles Hallé, German-English pianist and conductor (d. 1895)
1825 – Ferdinand Lassalle, German philosopher and jurist (d. 1864)
1827 – Jyotirao Phule, Indian scholar, philosopher, and activist (d. 1890)
1830 – John Douglas, English architect (d. 1911)
1837 – Elmer E. Ellsworth, American army officer and law clerk (d. 1861)
1854 – Hugh Massie, Australian cricketer (d. 1938)
1856 – Arthur Shrewsbury, English cricketer and rugby player (d. 1903)
1859 – Stefanos Thomopoulos, Greek historian and author (d. 1939)
1862 – William Wallace Campbell, American astronomer and academic (d. 1938)
1862 – Charles Evans Hughes, American lawyer and politician, 44th United States Secretary of State (d. 1948)
1864 – Johanna Elberskirchen, German author and activist (d. 1943)
1866 – Bernard O'Dowd, Australian journalist, author, and poet (d. 1953)
1867 – Mark Keppel, American educator (d. 1928)
1869 – Gustav Vigeland, Norwegian sculptor, designed the Nobel Peace Prize medal (d. 1943)
1871 – Gyula Kellner, Hungarian runner (d. 1940)
1872 – Aleksandër Stavre Drenova, Albanian poet, rilindas and author of national anthem of Albania (d. 1947)
1873 – Edward Lawson, English soldier, Victoria Cross recipient (d. 1955)
1876 – Paul Henry, Irish painter (d. 1958)
1876 – Ivane Javakhishvili, Georgian historian and academic (d. 1940)
1878 – Percy Lane Oliver, British pioneer of volunteer blood donation (d. 1944)Oliver, Percy Lane (2004) 'Oliver, Percy Lane (1878–1944)', Oxford Dictionary of National Biography, Oxford University Press, Retrieved on 5 May 2024.
1879 – Bernhard Schmidt, Estonian-German astronomer and optician (d. 1935)
1887 – Jamini Roy, Indian painter (d. 1972)
1893 – Dean Acheson, American lawyer and politician, 51st United States Secretary of State (d. 1971)
1896 – Léo-Paul Desrosiers, Canadian journalist and author (d. 1967)
1899 – Percy Lavon Julian, African-American chemist and academic (d. 1975)
1900 – Sándor Márai, Hungarian journalist and author (d. 1989)
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April 11
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1901–present
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1901–present
1903 – Misuzu Kaneko, Japanese poet (d. 1930)
1904 – K. L. Saigal, Indian singer and actor (d. 1947)
1905 – Attila József, Hungarian poet and educator (d. 1937)
1906 – Dale Messick, American author and illustrator (d. 2005)
1907 – Paul Douglas, American actor (d. 1959)
1908 – Jane Bolin, American lawyer and judge (d. 2007)
1908 – Masaru Ibuka, Japanese businessman, co-founded Sony (d. 1997)
1908 – Dan Maskell, English tennis player and sportscaster (d. 1992)
1908 – Leo Rosten, Polish-American author and academic (d. 1997)
1910 – António de Spínola, Portuguese general and politician, 14th President of Portugal (d. 1996)
1912 – John Levy, American bassist and businessman (d. 2012)
1913 – Oleg Cassini, French-American fashion designer (d. 2006)
1914 – Norman McLaren, Scottish-Canadian animator, director, and producer (d. 1987)
1914 – Robert Stanfield, Canadian economist, lawyer, and politician, 17th Premier of Nova Scotia (d. 2003)
1914 – Dorothy Lewis Bernstein, American mathematician (d. 1988)
1916 – Alberto Ginastera, Argentinian pianist and composer (d. 1983)
1916 – Howard W. Koch, American director and producer (d. 2001)
1917 – David Westheimer, American soldier, journalist, and author (d. 2005)
1918 – Richard Wainwright, English soldier and politician (d. 2003)
1919 – Raymond Carr, English historian and academic (d. 2015)
1920 – Emilio Colombo, Italian lawyer and politician, 40th Prime Minister of Italy (d. 2013)
1920 – William Royer, American soldier and politician (d. 2013)
1921 – Jim Hearn, American baseball player (d. 1998)
1921 – Jack Rayner, Australian rugby league player and coach (d. 2008)
1922 – Arved Viirlaid, Estonian-Canadian soldier and author (d. 2015)
1923 – George J. Maloof, Sr., American businessman (d. 1980)
1924 – Mohammad Naseem, Pakistani-English activist and politician (d. 2014)
1925 – Yuriy Lituyev, Russian hurdler and commander (d. 2000)
1925 – Viola Liuzzo, American civil rights activist (d. 1965)
1925 – Viktor Masing, Estonian botanist and ecologist (d. 2001)
1925 – Pierre Péladeau, Canadian businessman, founded Quebecor (d. 1997)
1926 – David Manker Abshire, American commander and diplomat, United States Permanent Representative to NATO (d. 2014)
1926 – Victor Bouchard, Canadian pianist and composer (d. 2011)
1926 – Karl Rebane, Estonian physicist and academic (d. 2007)
1927 – Lokesh Chandra, Indian historian
1928 – Ethel Kennedy, American philanthropist (d. 2024)
1928 – Edwin Pope, American journalist and author (d. 2017)
1928 – Tommy Tycho, Hungarian-Australian pianist, composer, and conductor (d. 2013)
1930 – Nicholas F. Brady, American businessman and politician, 68th United States Secretary of the Treasury
1930 – Walter Krüger, German javelin thrower (d. 2018)
1930 – Anton LaVey, American occultist, founded the Church of Satan (d. 1997)
1931 – Lewis Jones, Welsh rugby player and coach (d. 2024)
1932 – Joel Grey, American actor, singer, and dancer
1933 – Tony Brown, American journalist and academic
1934 – Mark Strand, Canadian-born American poet, essayist, and translator (d. 2014)
1934 – Ron Pember, English actor, director and playwright (d. 2022)
1935 – Richard Berry, American singer-songwriter (d. 1997)
1936 – Brian Noble, English bishop (d. 2019)
1937 – Jill Gascoine, English actress and author (d. 2020)
1938 – Gerry Baker, American soccer player and manager (d. 2013)
1938 – Michael Deaver, American politician, Deputy White House Chief of Staff (d. 2007)
1938 – Reatha King, American chemist and businesswoman
1939 – Luther Johnson, American singer and guitarist (d. 2022)
1939 – Louise Lasser, American actress
1940 – Col Firmin, Australian politician (d. 2013)
1940 – Władysław Komar, Polish shot putter and actor (d. 1998)
1941 – Ellen Goodman, American journalist and author
1941 – Shirley Stelfox, English actress (d. 2015)
1942 – Anatoly Berezovoy, Russian colonel, pilot, and astronaut (d. 2014)
1942 – Hattie Gossett, American writer
1942 – James Underwood, English pathologist and academic
1943 – John Montagu, 11th Earl of Sandwich, English businessman and politician
1943 – Harley Race, American wrestler and trainer (d. 2019)
1944 – Peter Barfuß, German footballer
1944 – John Milius, American director, producer, and screenwriter
1945 – John Krebs, Baron Krebs, English zoologist and academic
1946 – Chris Burden, American sculptor, illustrator, and academic (d. 2015)
1946 – Bob Harris, English journalist and radio host
1947 – Lev Bulat, Ukrainian-Russian physicist and academic (d. 2016)
1947 – Uli Edel, German director and screenwriter
1947 – Frank Mantooth, American pianist and composer (d. 2004)
1947 – Peter Riegert, American actor, screenwriter and film director
1947 – Michael T. Wright, English engineer and academic (d. 2015)
1949 – Dorothy Allison, American writer (d. 2024)
1949 – Bernd Eichinger, German director and producer (d. 2011)
1950 – Bill Irwin, American actor and clown
1951 – Paul Fox, English singer and guitarist (d. 2007)
1952 – Nancy Honeytree, American singer and guitarist
1952 – Indira Samarasekera, Sri Lankan engineer and academic
1952 – Peter Windsor, English-Australian journalist and sportscaster
1953 – Guy Verhofstadt, Belgian politician, 47th Prime Minister of Belgium
1953 – Andrew Wiles, English mathematician and academic
1954 – Abdullah Atalar, Turkish engineer and academic
1954 – Aleksandr Averin, Azerbaijani cyclist and coach
1954 – Francis Lickerish, English guitarist and composer
1954 – David Perrett, Scottish psychologist and academic
1954 – Ian Redmond, English biologist and conservationist
1954 – Willie Royster, American baseball player (d. 2015)
1955 – Kevin Brady, American lawyer and politician
1955 – Michael Callen, American singer-songwriter and AIDS activist (d. 1993)
1955 – Micheal Ray Richardson, American basketball player and coach
1958 – Stuart Adamson, Scottish singer-songwriter and guitarist (d. 2001)
1958 – Lyudmila Kondratyeva, Russian sprinter
1958 – Wayne Wigham, Australian rugby league playerRugby League Project
1959 – Pierre Lacroix, Canadian ice hockey player
1959 – Ana María Polo, Cuban-American lawyer and judge
1959 – Zahid Maleque, Bangladeshi politician
1960 – Jeremy Clarkson, English journalist and television presenter
1961 – Vincent Gallo, American actor, director, producer, and musician
1961 – Doug Hopkins, American guitarist and songwriter (d. 1993)
1961 – Nobuaki Kakuda, Japanese martial artist
1962 – Franck Ducheix, French fencer
1962 – Mark Lawson, English journalist and author
1963 – Billy Bowden, New Zealand cricketer and umpire
1963 – Waldemar Fornalik, Polish footballer and manager
1963 – Elizabeth Smylie, Australian tennis player
1963 – Eleni Tsaligopoulou, Greek singer
1964 – Steve Azar, American singer-songwriter and guitarist
1964 – John Cryer, English journalist and politician
1964 – Johann Sebastian Paetsch, American cellist
1964 – Bret Saberhagen, American baseball player and coach
1964 – Patrick Sang, Kenyan runner
1966 – Steve Scarsone, American baseball player and manager
1966 – Shin Seung-hun, South Korean singer-songwriter
1966 – Lisa Stansfield, English singer-songwriter and actress
1968 – Sergei Lukyanenko, Kazakh-Russian journalist and author
1969 – Cerys Matthews, Welsh singer-songwriter
1969 – Dustin Rhodes, American wrestler
1969 – Michael von Grünigen, Swiss skier
1970 – Trevor Linden, Canadian ice hockey player and manager
1970 – Whigfield, Danish singer and songwriter
1971 – Oliver Riedel, German bass player
1972 – Balls Mahoney, American wrestler (d. 2016)
1972 – Allan Théo, French singer
1972 – Jason Varitek, American baseball player and manager
1973 – Olivier Magne, French rugby player
1973 – Jennifer Esposito, American actress and writer
1974 – Àlex Corretja, Spanish tennis player and coach
1974 – Ashot Danielyan, Armenian weightlifter
1974 – David Jassy, Swedish singer-songwriter and producer
1974 – Tom Thacker, Canadian singer-songwriter, guitarist, and producer
1974 – Trot Nixon, American baseball player and sportscaster
1976 – Marta Breen, Norwegian journalist, non-fiction writer, and organizational leader
1976 – Kelvim Escobar, Venezuelan baseball player
1976 – Kotomitsuki Keiji, Japanese sumo wrestler
1977 – Ivonne Teichmann, German runner
1978 – Josh Hancock, American baseball player (d. 2007)
1979 – Malcolm Christie, English footballer
1979 – Sebastien Grainger, Canadian singer-songwriter and guitarist
1979 – Michel Riesen, Swiss ice hockey player
1979 – Josh Server, American actor
1980 – Keiji Tamada, Japanese footballer
1980 – Mark Teixeira, American baseball player
1981 – Alessandra Ambrosio, Brazilian model
1981 – Alexandre Burrows, Canadian ice hockey player
1981 – Luis Flores, Dominican basketball player
1981 – Veronica Pyke, Australian cricketer
1982 – Ian Bell, English cricketer
1982 – Peeter Kümmel, Estonian skier
1983 – Jennifer Heil, Canadian skier
1983 – Rubén Palazuelos, Spanish footballer
1983 – Nicky Pastorelli, Dutch race car driver
1984 – Kelli Garner, American actress
1984 – Nikola Karabatić, French handball player
1985 – Pablo Hernández Domínguez, Spanish footballer
1985 – Will Minson, Australian footballer
1986 – Sarodj Bertin, Haitian model and human rights lawyer
1986 – Lena Schöneborn, German pentathlete
1987 – Joss Stone, English singer-songwriter and actress
1987 – Lights, Canadian singer-songwriter
1988 – Milton Casco, Argentine footballer
1988 – Leland Irving, Canadian ice hockey player
1989 – Torrin Lawrence, American sprinter (d. 2014)
1990 – Dimitrios Anastasopoulos, Greek footballer
1990 – Thulani Serero, South African footballer
1991 – Thiago Alcântara, Spanish footballer
1991 – Cédric Bakambu, Congolese footballer
1991 – Brennan Poole, American racing driver
1993 – Florin Andone, Romanian footballer
1994 – Brandon Montour, Canadian ice hockey player
1996 – Dele Alli, English international footballer
1996 – Summer Walker, American singer-songwriter
2000 – Calen Addison, Canadian ice hockey player
2000 – Milly Alcock, Australian actress
2000 – Loïc Badé, French footballer
2000 – Ken Carson, American rapper and record producer
2000 – Karina, South Korean singer
2001 – Manuel Ugarte, Uruguayan footballer
2002 – Jake Fraser-McGurk, Australian cricketer
2005 – Jack Hinshelwood, English footballer
2005 – Danielle Marsh, South Korean-Australian singer
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April 11
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Deaths
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Deaths
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April 11
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Pre-1600
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Pre-1600
618 – Yang Guang, Chinese emperor of the Sui Dynasty (b. 569)
678 – Donus, pope of the Catholic Church (b. 610)
924 – Herman I, chancellor and archbishop of Cologne
1034 – Romanos III Argyros, Byzantine emperor (b. 968)
1077 – Anawrahta, king of Burma and founder of the Pagan Empire (b. 1014)
1079 – Stanislaus of Szczepanów, bishop of Kraków (b. 1030)
1165 – Stephen IV, king of Hungary and Croatia
1240 – Llywelyn the Great, Welsh prince (b. 1172)
1349 – Ramadan ibn Alauddin, first known Muslim from Korea
1447 – Henry Beaufort, Cardinal, Lord Chancellor of England (b. 1377)
1512 – Gaston de Foix, French military commander (b. 1489)
1554 – Thomas Wyatt the Younger, English rebel leader (b. 1521)
1587 – Thomas Bromley, English lord chancellor (b. 1530)
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April 11
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1601–1900
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1601–1900
1609 – John Lumley, 1st Baron Lumley, English noble (b. 1533)
1612 – Emanuel van Meteren, Flemish historian and author (b. 1535)
1612 – Edward Wightman, English minister and martyr (b. 1566)
1626 – Marino Ghetaldi, Ragusan mathematician and physicist (b. 1568)
1712 – Richard Simon, French priest and critic (b. 1638)
1723 – John Robinson, English bishop and diplomat (b. 1650)
1783 – Nikita Ivanovich Panin, Polish-Russian politician, Russian Minister of Foreign Affairs (b. 1718)
1798 – Karl Wilhelm Ramler, German poet and academic (b. 1725)
1856 – Juan Santamaría, Costa Rican soldier (b. 1831)
1861 – Francisco González Bocanegra, Mexican poet and composer (b. 1824)
1870 – Justo José de Urquiza, Argentine general, politician and first constitutional president of Argentina (b. 1801)
1873 – Edward Canby, American general (b. 1817)
1890 – David de Jahacob Lopez Cardozo, Dutch Talmudist (b. 1808)
1890 – Joseph Merrick, English man with severe deformities (b. 1862)
1894 – Constantin Lipsius, German architect and theorist (b. 1832)
1895 – Julius Lothar Meyer, German chemist (b. 1830)
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April 11
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1901–present
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1901–present
1902 – Wade Hampton III, Confederate general and politician, 77th Governor of South Carolina (b. 1818)
1903 – Gemma Galgani, Italian mystic and saint (b. 1878)
1906 – James Anthony Bailey, American businessman, co-founded Ringling Bros. and Barnum & Bailey Circus (b. 1847)
1906 – Francis Pharcellus Church, American journalist and publisher, co-founded Armed Forces Journal and The Galaxy Magazine (b. 1839)
1908 – Henry Bird, English chess player and author (b. 1829)
1916 – Richard Harding Davis, American journalist and author (b. 1864)
1918 – Otto Wagner, Austrian architect and urban planner (b. 1841)
1926 – Luther Burbank, American botanist and academic (b. 1849)
1939 – Kurtdereli Mehmet, Turkish wrestler (b. 1864)
1953 – Kid Nichols, American baseball player and manager (b. 1869)
1954 – Paul Specht, American violinist and bandleader (b. 1895)
1958 – Konstantin Yuon, Russian painter and educator (b. 1875)
1960 – Rosa Grünberg, Swedish actress (b. 1878)
1962 – Ukichiro Nakaya, Japanese physicist and academic (b. 1900)
1962 – George Poage, American hurdler and educator (b. 1880)
1962 – Axel Revold, Norwegian painter (b. 1887)
1967 – Thomas Farrell, American general (b. 1891)
1967 – Donald Sangster, Jamaican lawyer and politician, 2nd Prime Minister of Jamaica (b. 1911)
1970 – Cathy O'Donnell, American actress (b. 1923)
1970 – John O'Hara, American novelist and short story writer (b. 1905)
1974 – Ernst Ziegler, German actor (b. 1894)
1977 – Jacques Prévert, French poet and screenwriter (b. 1900)
1977 – Phanishwar Nath 'Renu', Indian author and activist (b. 1921)
1980 – Ümit Kaftancıoğlu, Turkish journalist and producer (b. 1935)
1981 – Caroline Gordon, American author and critic (b. 1895)
1983 – Dolores del Río, Mexican actress (b. 1904)
1984 – Edgar V. Saks, Estonian historian and politician, Estonian Minister of Education (b. 1910)
1985 – Bunny Ahearne, Irish-born English businessman (b. 1900)
1985 – John Gilroy, English artist and illustrator (b. 1898)
1985 – Enver Hoxha, Albanian educator and politician, 21st Prime Minister of Albania (b. 1908)
1987 – Erskine Caldwell, American novelist and short story writer (b. 1903)
1987 – Primo Levi, Italian chemist and author (b. 1919)
1990 – Harold Ballard, Canadian businessman (b. 1903)
1991 – Walker Cooper, American baseball player and manager (b. 1915)
1991 – Bruno Hoffmann. German glass harp player (b. 1913)
1992 – James Brown, American actor and singer (b. 1920)
1992 – Eve Merriam, American author and poet (b. 1916)
1992 – Alejandro Obregón, Colombian painter, sculptor, and engraver (b. 1920)
1996 – Jessica Dubroff, American pilot (b. 1988)
1997 – Muriel McQueen Fergusson, Canadian lawyer and politician, Canadian Speaker of the Senate (b. 1899)
1997 – Wang Xiaobo, contemporary Chinese novelist and essayist (b. 1952)
1999 – William H. Armstrong, American author and educator (b. 1911)
2000 – Diana Darvey, English actress, singer and dancer (b. 1945)
2001 – Harry Secombe, Welsh-English actor (b. 1921)
2003 – Cecil Howard Green, English-American geophysicist and businessman, founded Texas Instruments (b. 1900)
2005 – André François, Romanian-French cartoonist, painter, and sculptor (b. 1915)
2005 – Lucien Laurent, French footballer and coach (b. 1907)
2006 – June Pointer, American singer (b. 1953)
2006 – DeShaun Holton, American rapper and actor (b. 1973)
2007 – Roscoe Lee Browne, American actor and director (b. 1922)
2007 – Loïc Leferme, French diver (b. 1970)
2007 – Janet McDonald, American lawyer and author (b. 1954)
2007 – Ronald Speirs, Scottish-American colonel (b. 1920)
2007 – Kurt Vonnegut, American novelist, short story writer, and playwright (b. 1922)
2008 – Merlin German, American sergeant (b. 1985)
2009 – Gerda Gilboe, Danish actress and singer (b. 1914)
2009 – Vishnu Prabhakar, Indian author and playwright (b. 1912)
2009 – Corín Tellado, Spanish author (b. 1927)
2010 – Julia Tsenova, Bulgarian pianist and composer (b. 1948)
2011 – Larry Sweeney, American wrestler and manager (b. 1981)
2012 – Ahmed Ben Bella, Algerian soldier and politician, 1st President of Algeria (b. 1916)
2012 – Roger Caron, Canadian criminal and author (b. 1938)
2012 – Tippy Dye, American basketball player and coach (b. 1915)
2012 – Hal McKusick, American saxophonist, clarinet player, and flute player (b. 1924)
2012 – Agustin Roman, American bishop (b. 1928)
2013 – Don Blackman, American singer-songwriter, pianist, and producer (b. 1953)
2013 – Sue Draheim, American fiddler (b.1949)Hunt, Ken 2013 Sue Draheim: Widely admired folk violinist independent.co.uk.
2013 – Grady Hatton, American baseball player, coach, and manager (b. 1922)
2013 – Thomas Hemsley, English actor and singer (b. 1927)
2013 – Hilary Koprowski, Polish-American virologist and immunologist (b. 1916)
2013 – Gilles Marchal, French singer-songwriter (b. 1944)
2013 – Maria Tallchief, American ballerina (b. 1925)
2013 – Clorindo Testa, Italian-Argentinian architect (b. 1923)
2013 – Jonathan Winters, American comedian, actor and screenwriter (b. 1925)
2014 – Rolf Brem, Swiss sculptor and illustrator (b. 1926)
2014 – Edna Doré, English actress (b. 1921)
2014 – Bill Henry, American baseball player (b. 1927)
2014 – Lou Hudson, American basketball player and sportscaster (b. 1944)
2014 – Myer S. Kripke, American rabbi and scholar (b. 1914)
2014 – Sergey Nepobedimy, Russian engineer (b. 1921)
2014 – Jesse Winchester, American singer-songwriter, guitarist, and producer (b. 1944)
2015 – Jimmy Gunn, American football player (b. 1948)
2015 – Muhammad Kamaruzzaman, Bangladeshi journalist and politician (b. 1952)
2015 – François Maspero, French journalist and author (b. 1932)
2015 – Hanut Singh, Indian general (b. 1933)
2015 – Tekena Tamuno, Nigerian historian and academic (b. 1932)
2017 – J. Geils, American singer and guitarist (b. 1946)
2017 – Mark Wainberg, Canadian researcher and HIV/AIDS activist (b. 1945)
2020 – John Horton Conway, English mathematician (b. 1937)
2024 – Park Bo-ram, South Korean singer (b. 1994)
2025 – Mike Berry, British singer and actor (b. 1942)
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April 11
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Holidays and observances
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Holidays and observances
Christian feast day:
Antipas of Pergamum (Greek Orthodox Church)
Barsanuphius"Saint Barsanuphius of Gaza", Catholic Daily Readings.Roman Martyrology, via Boston Catholic Journal, accessed April 11, 2021.
Elena GuerraSant' Elena Guerra, Santi e Beati, accessed February 24, 2025.
Gemma Galgani
Godeberta
Guthlac of Crowland
George Selwyn (Anglicanism)
Stanislaus of Szczepanów
April 11 (Eastern Orthodox liturgics)
Juan Santamaría Day, anniversary of his death in the Second Battle of Rivas. (Costa Rica)
International Louie Louie Day
World Parkinson's Day
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April 11
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References
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References
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April 11
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External links
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External links
BBC: On This Day
Historical Events on April 11
Category:Days of April
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April 11
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Table of Content
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short description, Events, Pre-1600, 1601–1900, 1901–present, Births, Pre-1600, 1601–1900, 1901–present, Deaths, Pre-1600, 1601–1900, 1901–present, Holidays and observances, References, External links
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Adhesive
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short description
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thumb|right|Nitrocellulose adhesive dispensed from a tube
Adhesive, also known as glue, cement, mucilage, or paste, is any non-metallic substance applied to one or both surfaces of two separate items that binds them together and resists their separation.
The use of adhesives offers certain advantages over other binding techniques such as sewing, mechanical fastenings, and welding. These include the ability to bind different materials together, the more efficient distribution of stress across a joint, the cost-effectiveness of an easily mechanized process, and greater flexibility in design. Disadvantages of adhesive use include decreased stability at high temperatures, relative weakness in bonding large objects with a small bonding surface area, and greater difficulty in separating objects during testing. Adhesives are typically organized by the method of adhesion followed by reactive or non-reactive, a term which refers to whether the adhesive chemically reacts in order to harden. Alternatively, they can be organized either by their starting physical phase or whether their raw stock is of natural or synthetic origin.
Adhesives may be found naturally or produced synthetically. The earliest human use of adhesive-like substances was approximately 200,000 years ago, when Neanderthals produced tar from the dry distillation of birch bark for use in binding stone tools to wooden handles. The first references to adhesives in literature appeared approximately 2000 BC. The Greeks and Romans made great contributions to the development of adhesives. In Europe, glue was not widely used until the period AD 1500–1700. From then until the 1900s increases in adhesive use and discovery were relatively gradual. Only since the 20th century has the development of synthetic adhesives accelerated rapidly, and innovation in the field continues to the present.
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Adhesive
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History
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History
thumbnail|left|Liquid animal glue
The earliest evidence of human adhesive use was discovered in central Italy when three stone implements were discovered with birch bark tar indications. The tools were dated to about 200,000 before present in the Middle Paleolithic. It is the earliest example of tar-hafted stone tools.
An experimental archeology study published in 2019 demonstrated how birch bark tar can be produced in an easier, more discoverable process. It involves directly burning birch bark under an overhanging rock surface in an open-air environment and collecting the tar that builds up on the rock.
Although sticky enough, plant-based, single-component adhesives can be brittle and vulnerable to environmental conditions. The first use of compound adhesives was discovered in Sibudu, South Africa. Here, 70,000-year-old stone segments that were once inserted in axe hafts were discovered covered with an adhesive composed of plant gum and red ochre (natural iron oxide) as adding ochre to plant gum produces a stronger product and protects the gum from disintegrating under wet conditions. The ability to produce stronger adhesives allowed middle Stone Age humans to attach stone segments to sticks in greater variations, which led to the development of new tools. A study of material from Le Moustier indicates that Middle Paleolithic people, possibly Neanderthals, used glue made from a mixture of ocher and bitumen to make hand grips for cutting and scraping stone tools.
More recent examples of adhesive use by prehistoric humans have been found at the burial sites of ancient tribes. Archaeologists studying the sites found that approximately 6,000 years ago the tribesmen had buried their dead together with food found in broken clay pots repaired with tree resins. Another investigation by archaeologists uncovered the use of bituminous cements to fasten ivory eyeballs to statues in Babylonian temples dating to approximately 4000 BC.
thumb|upright|A reconstruction of Ötzi's axe, which used pitch as an adhesive
In 2000, a paper revealed the discovery of a 5,200-year-old man nicknamed the "Tyrolean Iceman" or "Ötzi", who was preserved in a glacier near the Austria-Italy border. Several of his belongings were found with him including two arrows with flint arrowheads and a copper hatchet, each with evidence of organic glue used to connect the stone or metal parts to the wooden shafts. The glue was analyzed as pitch, which requires the heating of tar during its production. The retrieval of this tar requires a transformation of birch bark by means of heat, in a process known as pyrolysis.Sauter F, Jordis U, Graf A, Werther W, Varmuza K. (2000). Studies in organic archaeology I: identification of the prehistoric adhesive used by the "Tyrolean Iceman" to fix his weapons . ARKIVOC, 1:[5] 735–747
The first references to adhesives in literature appeared in approximately 2000 BC. Further historical records of adhesive use are found from the period spanning 1500–1000 BC. Artifacts from this period include paintings depicting wood gluing operations and a casket made of wood and glue in King Tutankhamun's tomb. Other ancient Egyptian artifacts employ animal glue for bonding or lamination. Such lamination of wood for bows and furniture is thought to have extended their life and was accomplished using casein (milk protein)-based glues. The ancient Egyptians also developed starch-based pastes for the bonding of papyrus to clothing and a plaster of Paris-like material made of calcined gypsum.
thumb|Beeswax|left
From AD 1 to 500 the Greeks and Romans made great contributions to the development of adhesives. Wood veneering and marquetry were developed, the production of animal and fish glues refined, and other materials utilized. Egg-based pastes were used to bond gold leaves, and incorporated various natural ingredients such as blood, bone, hide, milk, cheese, vegetables, and grains. The Greeks began the use of slaked lime as mortar while the Romans furthered mortar development by mixing lime with volcanic ash and sand. This material, known as pozzolanic cement, was used in the construction of the Roman Colosseum and Pantheon. The Romans were also the first people known to have used tar and beeswax as caulk and sealant between the wooden planks of their boats and ships.
In Central Asia, the rise of the Mongols in approximately AD 1000 can be partially attributed to the good range and power of the bows of Genghis Khan's hordes. These bows were made of a bamboo core, with horn on the belly (facing towards the archer) and sinew on the back, bound together with animal glue.
framed|right|Casein glue preparation
In Europe, glue fell into disuse until the period AD 1500–1700. At this time, world-renowned cabinet and furniture makers such as Thomas Chippendale and Duncan Phyfe began to use adhesives to hold their products together. In 1690, the first commercial glue plant was established in The Netherlands. This plant produced glues from animal hides. In 1750, the first British glue patent was issued for fish glue. The following decades of the next century witnessed the manufacture of casein glues in German and Swiss factories. In 1876, the first U.S. patent (number 183,024) was issued to the Ross brothers for the production of casein glue.
The first U.S. postage stamps used starch-based adhesives when issued in 1847. The first US patent (number 61,991) on dextrin (a starch derivative) adhesive was issued in 1867.
Natural rubber was first used as material for adhesives in 1830, which marked the starting point of the modern adhesive. In 1862, a British patent (number 3288) was issued for the plating of metal with brass by electrodeposition to obtain a stronger bond to rubber. The development of the automobile and the need for rubber shock mounts required stronger and more durable bonds of rubber and metal. This spurred the development of cyclized rubber treated in strong acids. By 1927, this process was used to produce solvent-based thermoplastic rubber cements for metal to rubber bonding.
Natural rubber-based sticky adhesives were first used on a backing by Henry Day (US Patent 3,965) in 1845. Later these kinds of adhesives were used in cloth backed surgical and electric tapes. By 1925, the pressure-sensitive tape industry was born.
Today, sticky notes, Scotch Tape, and other tapes are examples of pressure-sensitive adhesives (PSA).
A key step in the development of synthetic plastics was the introduction of a thermoset plastic known as Bakelite phenolic in 1910. Within two years, phenolic resin was applied to plywood as a coating varnish. In the early 1930s, phenolics gained importance as adhesive resins.
The 1920s, 1930s, and 1940s witnessed great advances in the development and production of new plastics and resins due to the First and Second World Wars. These advances greatly improved the development of adhesives by allowing the use of newly developed materials that exhibited a variety of properties. With changing needs and ever evolving technology, the development of new synthetic adhesives continues to the present. However, due to their low cost, natural adhesives are still more commonly used.
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Adhesive
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Types
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Types
Adhesives are typically organized by the method of adhesion. These are then organized into reactive and non-reactive adhesives, which refers to whether the adhesive chemically reacts in order to harden. Alternatively they can be organized by whether the raw stock is of natural, or synthetic origin, or by their starting physical phase.
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Adhesive
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By reactiveness
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By reactiveness
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Adhesive
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Non-reactive
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Non-reactive
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Adhesive
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Drying
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Drying
There are two types of adhesives that harden by drying: solvent-based adhesives and polymer dispersion adhesives, also known as emulsion adhesives. Solvent-based adhesives are a mixture of ingredients (typically polymers) dissolved in a solvent. White glue, contact adhesives and rubber cements are members of the drying adhesive family. As the solvent evaporates, the adhesive hardens. Depending on the chemical composition of the adhesive, they will adhere to different materials to greater or lesser degrees.
Polymer dispersion adhesives are milky-white dispersions often based on polyvinyl acetate (PVAc). They are used extensively in the woodworking and packaging industries. They are also used with fabrics and fabric-based components, and in engineered products such as loudspeaker cones.
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Adhesive
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Pressure-sensitive
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Pressure-sensitive
Pressure-sensitive adhesives (PSA) form a bond by the application of light pressure to bind the adhesive with the adherend. They are designed to have a balance between flow and resistance to flow. The bond forms because the adhesive is soft enough to flow (i.e., "wet") to the adherend. The bond has strength because the adhesive is hard enough to resist flow when stress is applied to the bond. Once the adhesive and the adherend are in close proximity, molecular interactions, such as van der Waals forces, become involved in the bond, contributing significantly to its ultimate strength.
PSAs are designed for either permanent or removable applications. Examples of permanent applications include safety labels for power equipment, foil tape for HVAC duct work, automotive interior trim assembly, and sound/vibration damping films. Some high performance permanent PSAs exhibit high adhesion values and can support kilograms of weight per square centimeter of contact area, even at elevated temperatures. Permanent PSAs may initially be removable (for example to recover mislabeled goods) and build adhesion to a permanent bond after several hours or days.
Removable adhesives are designed to form a temporary bond, and ideally can be removed after months or years without leaving residue on the adherend. Removable adhesives are used in applications such as surface protection films, masking tapes, bookmark and note papers, barcode labels, price marking labels, promotional graphics materials, and for skin contact (wound care dressings, EKG electrodes, athletic tape, analgesic and trans-dermal drug patches, etc.). Some removable adhesives are designed to repeatedly stick and unstick. They have low adhesion, and generally cannot support much weight. Pressure-sensitive adhesive is used in Post-it notes.
Pressure-sensitive adhesives are manufactured with either a liquid carrier or in 100% solid form. Articles are made from liquid PSAs by coating the adhesive and drying off the solvent or water carrier. They may be further heated to initiate a cross-linking reaction and increase molecular weight. 100% solid PSAs may be low viscosity polymers that are coated and then reacted with radiation to increase molecular weight and form the adhesive, or they may be high viscosity materials that are heated to reduce viscosity enough to allow coating, and then cooled to their final form. Major raw material for PSA's are acrylate-based polymers.
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Adhesive
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Contact
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Contact
Contact adhesives form high shear-resistance bonds with a rapid cure time. They are often applied in thin layers for use with laminates, such as bonding Formica to countertops, and in footwear, as in attaching outsoles to uppers. Natural rubber and polychloroprene (Neoprene) are commonly used contact adhesives. Both of these elastomers undergo strain crystallization.
Contact adhesives must be applied to both surfaces and allowed some time to dry before the two surfaces are pushed together. Some contact adhesives require as long as 24 hours to dry completely before the surfaces are to be held together. Once the surfaces are pushed together, the bond forms very quickly. Clamps are typically not needed due to the rapid bond formation.
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Adhesive
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Hot
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Hot
right|thumbnail|A glue gun, an example of a hot adhesive
Hot adhesives, also known as hot melt adhesives, are thermoplastics applied in molten form (in the 65–180 °C range) which solidify on cooling to form strong bonds between a wide range of materials. Ethylene-vinyl acetate-based hot-melts are particularly popular for crafts because of their ease of use and the wide range of common materials they can join. A glue gun (shown at right) is one method of applying hot adhesives. The glue gun melts the solid adhesive, then allows the liquid to pass through its barrel onto the material, where it solidifies.
Thermoplastic glue may have been invented around 1940 by Procter & Gamble as a solution to the problem that water-based adhesives, commonly used in packaging at that time, failed in humid climates, causing packages to open. However, water-based adhesives are still of strong interest as they typically do not contain volatile solvents.
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Adhesive
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Reactive
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Reactive
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Adhesive
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Anaerobic
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Anaerobic
Anaerobic adhesives cure when in contact with metal, in the absence of oxygen. They work well in a close-fitting space, as when used as a Thread-locking fluid.
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Adhesive
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Multi-part
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Multi-part
Multi-component adhesives harden by mixing two or more components which chemically react. This reaction causes polymers to cross-link into acrylates, urethanes, and epoxies .
There are several commercial combinations of multi-component adhesives in use in industry. Some of these combinations are:
Polyester resin & polyurethane resin
Polyols & polyurethane resin
Acrylic polymers & polyurethane resins
The individual components of a multi-component adhesive are not adhesive by nature. The individual components react with each other after being mixed and show full adhesion only on curing. The multi-component resins can be either solvent-based or solvent-less. The solvents present in the adhesives are a medium for the polyester or the polyurethane resin. The solvent is dried during the curing process.
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Adhesive
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Pre-mixed and frozen adhesives
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Pre-mixed and frozen adhesives
Pre-mixed and frozen adhesives (PMFs) are adhesives that are mixed, deaerated, packaged, and frozen. As it is necessary for PMFs to remain frozen before use, once they are frozen at −80 °C they are shipped with dry ice and are required to be stored at or below −40 °C. PMF adhesives eliminate mixing mistakes by the end user and reduce exposure of curing agents that can contain irritants or toxins. PMFs were introduced commercially in the 1960s and are commonly used in aerospace and defense.
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Adhesive
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One-part
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One-part
One-part adhesives harden via a chemical reaction with an external energy source, such as radiation, heat, and moisture.
thumb|A watch with a date magnifying lens ("cyclops"). The cyclops is attached with transparent UV light curing adhesive to the top of the watch crystal.
Ultraviolet (UV) light curing adhesives, also known as light curing materials (LCM), have become popular within the manufacturing sector due to their rapid curing time and strong bond strength. Light curing adhesives can cure in as little as one second and many formulations can bond dissimilar substrates (materials) and withstand harsh temperatures. These qualities make UV curing adhesives essential to the manufacturing of items in many industrial markets such as electronics, telecommunications, medical, aerospace, glass, and optical. Unlike traditional adhesives, UV light curing adhesives not only bond materials together but they can also be used to seal and coat products. They are generally acrylic-based.
Heat curing adhesives consist of a pre-made mixture of two or more components. When heat is applied the components react and cross-link. This type of adhesive includes thermoset epoxies, urethanes, and polyimides.
Moisture curing adhesives cure when they react with moisture present on the substrate surface or in the air. This type of adhesive includes cyanoacrylates and urethanes.
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Adhesive
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By origin
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By origin
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Adhesive
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Natural
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Natural
Natural adhesives are made from organic sources such as vegetable starch (dextrin), natural resins, or animals (e.g. the milk protein caseinCCMR – Ask A Scientist! and hide-based animal glues). These are often referred to as bioadhesives.
One example is a simple paste made by cooking flour in water. Starch-based adhesives are used in corrugated board and paper sack production, paper tube winding, and wallpaper adhesives. Casein glue is mainly used to adhere glass bottle labels. Animal glues have traditionally been used in bookbinding, wood joining, and many other areas but now are largely replaced by synthetic glues except in specialist applications like the production and repair of stringed instruments. Albumen made from the protein component of blood has been used in the plywood industry. Masonite, a wood hardboard, was originally bonded using natural wood lignin, an organic polymer, though most modern particle boards such as MDF use synthetic thermosetting resins.
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Adhesive
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Synthetic
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Synthetic
Synthetic adhesives are made out of organic compounds. Many are based on elastomers, thermoplastics, emulsions, and thermosets. Examples of thermosetting adhesives are: epoxy, polyurethane, cyanoacrylate and acrylic polymers. The first commercially produced synthetic adhesive was Karlsons Klister in the 1920s.
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Adhesive
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Application
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Application
Applicators of different adhesives are designed according to the adhesive being used and the size of the area to which the adhesive will be applied. The adhesive is applied to either one or both of the materials being bonded. The pieces are aligned and pressure is added to aid in adhesion and rid the bond of air bubbles.
Common ways of applying an adhesive include brushes, rollers, using films or pellets, spray guns and applicator guns (e.g., caulk gun). All of these can be used manually or automated as part of a machine.
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Adhesive
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Mechanisms of adhesion
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Mechanisms of adhesion
For an adhesive to be effective it must have three main properties. Firstly, it must be able to wet the base material. Wetting is the ability of a liquid to maintain contact with a solid surface. It must also increase in strength after application, and finally it must be able to transmit load between the two surfaces/substrates being adhered.
Adhesion, the attachment between adhesive and substrate may occur either by mechanical means, in which the adhesive works its way into small pores of the substrate, or by one of several chemical mechanisms. The strength of adhesion depends on many factors, including the means by which it occurs.
In some cases, an actual chemical bond occurs between adhesive and substrate. Thiolated polymers, for example, form chemical bonds with endogenous proteins such as mucus glycoproteins, integrins or keratins via disulfide bridges. Because of their comparatively high adhesive properties, these polymers find numerous biomedical applications. In others, electrostatic forces, as in static electricity, hold the substances together. A third mechanism involves the van der Waals forces that develop between molecules. A fourth means involves the moisture-aided diffusion of the glue into the substrate, followed by hardening.
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Adhesive
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Methods to improve adhesion
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Methods to improve adhesion
The quality of adhesive bonding depends strongly on the ability of the adhesive to efficiently cover (wet) the substrate area. This happens when the surface energy of the substrate is greater than the surface energy of the adhesive. However, high-strength adhesives have high surface energy. Thus, they bond poorly to low-surface-energy polymers or other materials. To solve this problem, surface treatment can be used to increase the surface energy as a preparation step before adhesive bonding. Importantly, surface preparation provides a reproducible surface allowing consistent bonding results. The commonly used surface activation techniques include plasma activation, flame treatment and wet chemistry priming.A.V. Pocius, "Adhesion and adhesives technology", Carl Hanser Verlag, Munich (2002)
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Adhesive
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Electrically-debondable adhesive (EDA)
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Electrically-debondable adhesive (EDA)
Adhesives can be designed so that they debond when an electric current or electric field is applied, thereby eliminating part damage, or the need for heating.
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Adhesive
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Failure
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Failure
thumbnail|550px|Failure of the adhesive joint can occur in different locations
There are several factors that could contribute to the failure of two adhered surfaces. Sunlight and heat may weaken the adhesive. Solvents can deteriorate or dissolve adhesive. Physical stresses may also cause the separation of surfaces. When subjected to loading, debonding may occur at different locations in the adhesive joint. The major fracture types are the following:
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Adhesive
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Cohesive fracture
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Cohesive fracture
Cohesive fracture is obtained if a crack propagates in the bulk polymer which constitutes the adhesive. In this case the surfaces of both adherends after debonding will be covered by fractured adhesive. The crack may propagate in the center of the layer or near an interface. For this last case, the cohesive fracture can be said to be "cohesive near the interface".
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Adhesive
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Adhesive fracture
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Adhesive fracture
Adhesive fracture (sometimes referred to as interfacial fracture) is when debonding occurs between the adhesive and the adherend. In most cases, the occurrence of adhesive fracture for a given adhesive goes along with smaller fracture toughness.
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Adhesive
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Other types of fracture
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Other types of fracture
Other types of fracture include:
The mixed type, which occurs if the crack propagates at some spots in a cohesive and in others in an interfacial manner. Mixed fracture surfaces can be characterised by a certain percentage of adhesive and cohesive areas.
The alternating crack path type which occurs if the cracks jump from one interface to the other. This type of fracture appears in the presence of tensile pre-stresses in the adhesive layer.
Fracture can also occur in the adherend if the adhesive is tougher than the adherend. In this case, the adhesive remains intact and is still bonded to one substrate and remnants of the other. For example, when one removes a price label, the adhesive usually remains on the label and the surface. This is cohesive failure. If, however, a layer of paper remains stuck to the surface, the adhesive has not failed. Another example is when someone tries to pull apart Oreo cookies and all the filling remains on one side; this is an adhesive failure, rather than a cohesive failure.
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Adhesive
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Design of adhesive joints
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Design of adhesive joints
thumbnail|350px|Modes of failure
As a general design rule, the material properties of the object need to be greater than the forces anticipated during its use. (i.e. geometry, loads, etc.). The engineering work will consist of having a good model to evaluate the function. For most adhesive joints, this can be achieved using fracture mechanics. Concepts such as the stress concentration factor and the strain energy release rate can be used to predict failure. In such models, the behavior of the adhesive layer itself is neglected and only the adherents are considered.
Failure will also very much depend on the opening mode of the joint.
Mode I is an opening or tensile mode where the loadings are normal to the crack.
Mode II is a sliding or in-plane shear mode where the crack surfaces slide over one another in direction perpendicular to the leading edge of the crack. This is typically the mode for which the adhesive exhibits the highest resistance to fracture.
Mode III is a tearing or antiplane shear mode.
As the loads are usually fixed, an acceptable design will result from combination of a material selection procedure and geometry modifications, if possible. In adhesively bonded structures, the global geometry and loads are fixed by structural considerations and the design procedure focuses on the material properties of the adhesive and on local changes on the geometry.
Increasing the joint resistance is usually obtained by designing its geometry so that:
The bonded zone is large
It is mainly loaded in mode II
Stable crack propagation will follow the appearance of a local failure.
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Adhesive
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Shelf life
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Shelf life
Some glues and adhesives have a limited shelf life. Shelf life is dependent on multiple factors, the foremost of which being temperature. Adhesives may lose their effectiveness at high temperatures, as well as become increasingly stiff. Other factors affecting shelf life include exposure to oxygen or water vapor.
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Adhesive
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See also
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See also
Impact glue
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Adhesive
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References
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References
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Adhesive
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Bibliography
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Bibliography
Kinloch, Anthony J. (1987). Adhesion and Adhesives: Science and Technology. London: Chapman and Hall.
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Adhesive
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External links
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External links
Educational portal on adhesives and sealants
RoyMech: The theory of adhesive bonding
3M's Adhesive & Tapes Classification
Database of adhesives for attaching different materials
Category:Visual arts materials
Category:1750 introductions
Category:Packaging materials
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Adhesive
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Table of Content
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short description, History, Types, By reactiveness, Non-reactive, Drying, Pressure-sensitive, Contact, Hot, Reactive, Anaerobic, Multi-part, Pre-mixed and frozen adhesives, One-part, By origin, Natural, Synthetic, Application, Mechanisms of adhesion, Methods to improve adhesion, Electrically-debondable adhesive (EDA), Failure, Cohesive fracture, Adhesive fracture, Other types of fracture, Design of adhesive joints, Shelf life, See also, References, Bibliography, External links
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Anthony Hopkins
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Short description
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Sir Philip Anthony Hopkins (born 31 December 1937) is a Welsh actor. Considered one of Britain's most recognisable and prolific actors, he is known for his performances on the screen and stage. Hopkins has received numerous accolades, including two Academy Awards, four BAFTA Awards, two Primetime Emmy Awards, and a Laurence Olivier Award. He has also received the Cecil B. DeMille Award in 2005 and the BAFTA Fellowship for lifetime achievement in 2008. He was knighted by Queen Elizabeth II for his services to drama in 1993.
After graduating from the Royal Welsh College of Music & Drama in 1957, Hopkins trained at RADA (the Royal Academy of Dramatic Art) in London. He was then spotted by Laurence Olivier, who invited him to join the Royal National Theatre in 1965. Productions at the National included King Lear (his favourite Shakespeare play), Coriolanus, Macbeth, and Antony and Cleopatra. In 1985, he received acclaim and a Laurence Olivier Award for his performance in the David Hare play Pravda. His last stage play was a West End production of M. Butterfly in 1989.
Hopkins's early film roles include The Lion in Winter (1968), A Bridge Too Far (1977), and The Elephant Man (1980). He won two Academy Awards for Best Actor for playing Hannibal Lecter in The Silence of the Lambs (1991) and an octogenarian with dementia in The Father (2020), becoming the oldest Best Actor Oscar winner for the latter. His other Oscar-nominated films include The Remains of the Day (1993), Nixon (1995), Amistad (1997), and The Two Popes (2019). Other notable films include 84 Charing Cross Road (1987), Howards End (1992), Bram Stoker's Dracula (1992), Shadowlands (1993), Legends of the Fall (1994), The Mask of Zorro (1998), and the Marvel Cinematic Universe's Thor films (2011–2017).
For his work on television, Hopkins received a British Academy Television Award for Best Actor for his performance in War and Peace (1972). He won two Primetime Emmy Awards for Outstanding Actor in a Drama Series for The Lindbergh Kidnapping Case (1976) and The Bunker (1981). Other notable projects include the BBC film The Dresser (2015), PBS's King Lear (2018), and the HBO series Westworld (2016–2018).
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Anthony Hopkins
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Early life and education
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Early life and education
Philip Anthony Hopkins was born in the Margam district of Port Talbot, Wales, on 31 December 1937, the son of Annie Muriel (née Yeates) and baker Richard Arthur Hopkins.Stated in interview on Inside the Actors Studio, 2007. One of his grandfathers was from Wiltshire, England. He stated his father's working-class values have always underscored his life, "Whenever I get a feeling that I may be special or different, I think of my father and I remember his hands – his hardened, broken hands." His school days were unproductive; he would rather immerse himself in art, such as painting and drawing, or playing the piano than attend to his studies. In 1949, to instil discipline, his parents insisted he attend Jones' West Monmouth Boys' School in Pontypool. He remained there for five terms and was then educated at Cowbridge Grammar School in the Vale of Glamorgan. In an interview in 2002, he stated, "I was a poor learner, which left me open to ridicule and gave me an inferiority complex. I grew up absolutely convinced I was stupid."
thumb|Hopkins studied at RADA (the Royal Academy of Dramatic Art) in London from 1961 to 1963. In 2005, a new portrait of him featured in their centenary celebrations.
Hopkins was inspired by fellow Welsh actor Richard Burton, whom he met at the age of 15. He later called Burton "very gracious, very nice" but elaborated, "I don't know where everyone gets the idea we were good friends. I suppose it's because we are both Welsh and grew up near the same town. For the record, I didn't really know him at all." He enrolled at the Royal Welsh College of Music & Drama in Cardiff, from which he graduated in 1957. He next met Burton in 1975 as Burton prepared to take over Hopkins's role as the psychiatrist in Peter Shaffer's Equus, with Hopkins stating, "He was a phenomenal actor. So was Peter O'Toole – they were wonderful, larger-than-life characters." He spent two years doing his national service between 1958 and 1960, which he served in the British Army's Royal Artillery regiment where he was known as "Gunner Hopkins", before moving to London to study at RADA (the Royal Academy of Dramatic Art) from where he graduated in 1963.
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Anthony Hopkins
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Career
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Career
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Anthony Hopkins
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1960–1979: Theatre roles and film debut
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1960–1979: Theatre roles and film debut
Hopkins made his first professional stage appearance in the Palace Theatre, Swansea, in 1960 with Swansea Little Theatre's production of Have a Cigarette. In 1965, after several years in repertory, he was spotted by Laurence Olivier, who invited him to join the Royal National Theatre in London.Sir Anthony Hopkins portrait The Daily Telegraph. Retrieved 6 January 2011. Hopkins became Olivier's understudy, and filled in when Olivier was struck with appendicitis during a 1967 production of August Strindberg's The Dance of Death. Olivier later noted in his memoir, Confessions of an Actor, that, "A new young actor in the company of exceptional promise named Anthony Hopkins was understudying me and walked away with the part of Edgar like a cat with a mouse between its teeth." Up until that night, Hopkins was always nervous prior to going on stage. This has since changed, and Hopkins quoted his mentor as saying: "He [Olivier] said: 'Remember: "nerves" is vanity – you're wondering what people think of you; to hell with them, just jump off the edge'. It was great advice."
thumb|Richard Attenborough directed Hopkins in five films, and in the 1970s described him as "unquestionably the greatest actor of his generation".
He made his small-screen debut in a 1967 BBC broadcast of A Flea in Her Ear. His first starring role in a film came in 1964 in Changes, a short directed by Drewe Henley, written and produced by James Scott and co-starring Jacqueline Pearce. In 1968, Hopkins got his break in The Lion in Winter playing Richard the Lionheart, a performance which saw him nominated for the BAFTA Award for Best Actor in a Supporting Role. Hopkins portrayed Charles Dickens in the BBC television film The Great Inimitable Mr. Dickens in 1970, and Pierre Bezukhov in the BBC's mini series War and Peace (1972), receiving the British Academy Television Award for Best Actor for his performance in the latter.BFI Screenonline: Sherrin, Ned (1931–2007) Biography. BFI. Retrieved 19 January 2015 Making a name for himself as a screen actor, he appeared in Frank Pierson's neo-noir action thriller The Looking Glass War (1970), and Étienne Périer's When Eight Bells Toll (1971). The first of five collaborations with director Richard Attenborough, in 1972 Hopkins starred as British politician David Lloyd George in Young Winston.
In 1973, he again portrayed David Lloyd George in the BBC miniseries The Edwardians which aired in the US in 1974 on Masterpiece Theatre. Hopkins starred in a film adaptation of the Henrik Ibsen play A Doll's House (1973) alongside Claire Bloom, Ralph Richardson, Denholm Elliott, and Edith Evans. He then appeared in the comedy The Girl from Petrovka (1974) with Goldie Hawn and Hal Holbrook and also starred in the Richard Lester suspense film Juggernaut opposite Richard Harris and Omar Sharif. In October 1974, Hopkins played the psychologist Dysart in the original Broadway production of Sir Peter Shaffer's play Equus, starring opposite Peter Firth. For this performance, he received the Drama Desk Award for Outstanding Actor in a Play for the 1974–75 season. In 1977, he played British Army officer John Frost in Attenborough's World War II-set film A Bridge Too Far. In 1978, he starred in the sequel to National Velvet (1944), entitled International Velvet with Tatum O'Neal, Christopher Plummer, which was directed by Bryan Forbes. That same year, he also starred in Attenborough's psychological horror film Magic about a demonic ventriloquist's puppet with Gene Siskel adding it as one of the best films of the year. In 1979, Hopkins appeared as Prospero in a production of The Tempest held at the Mark Taper Forum in Los Angeles.
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Anthony Hopkins
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1980–1989: National Theatre and acclaim
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1980–1989: National Theatre and acclaim
thumb|left|upright|Hopkins portrayed Sir Frederick Treves in The Elephant Man (1980).
In 1980, he starred in David Lynch's The Elephant Man as the English doctor Sir Frederick Treves, who attends to Joseph Merrick (portrayed by John Hurt), a severely deformed man in 19th century London. The film received critical praise and attention from critics and received eight Academy Award nominations including for Best Picture. That year he also starred opposite Shirley MacLaine in A Change of Seasons. They famously did not get along; Hopkins later called her "the most obnoxious actress I have ever worked with". The film was a box office and critical failure. In 1981, he starred in the CBS television film The Bunker portraying Adolf Hitler during the final weeks of his life in and around his underground bunker in Berlin. John O'Connor praised Hopkins in his New York Times review: "The portrait becomes all the more riveting through an extraordinarily powerful performance from Anthony Hopkins. His Hitler is mad, often contemptible, but always understandable. Part of the problem, perhaps, is that the monster becomes a little too understandable. He is not made sympathetic, exactly, but he is given decidedly pathetic dimensions, making him just that much more acceptable as a dramatic and historical character." For his performance, he received a Primetime Emmy Award for Outstanding Lead Actor in a Limited Series or Movie. That same year he starred as Paul the Apostle opposite Robert Foxworth as Saint Peter in the biblical drama and miniseries Peter and Paul (1981).
In 1983, Hopkins also became a company member of The Mirror Theater Ltd's Repertory Company. In 1984, he portrayed Deeley in Harold Pinter's play Old Times at the Roundabout Theatre in New York. In 1984, he starred opposite Mel Gibson in The Bounty as William Bligh, captain of the Royal Navy ship , in a more accurate retelling of the mutiny on the Bounty. The following year, he starred as Quasimodo in the CBS television film The Hunchback of Notre Dame (1982). The film also starred Derek Jacobi, David Suchet, Tim Pigott-Smith, Nigel Hawthorne, and John Gielgud. He also starred in Strangers and Brothers (1984), Arch of Triumph (1984), Guilty Conscience (1985), Mussolini and I (1985), and The Tenth Man (1988). In 1985, Hopkins starred opposite Colin Firth in the Arthur Schnitzler play The Lonely Road at The Old Vic in London. That same year, he featured as Lambert Le Roux in the National Theatre production of Pravda in Sir David Hare and Howard Brenton's satirical play on the British newspaper industry in the Thatcher era.Gussow, Mel. ""THEATER: MIRROR REP, IN A REVIVAL OF 'RAIN'." The New York Times, 10 March 1984. Web. 10 January 2017. Receiving acclaim for his performance, Hopkins won the Laurence Olivier Award for Outstanding Achievement. Frank Rich in his New York Times review wrote, "Mr. Hopkins creates a memorable image of a perversely brilliant modern-day barbarian."
In 1986, he starred in David Hare's production of King Lear, Hopkins's favourite Shakespeare play, at the National Theatre. The next year, he starred as Mark Antony in the National Theatre production of Antony and Cleopatra opposite Judi Dench, and in 1989, Hopkins made his last appearance on stage in a West End production of M. Butterfly. "It was a torment", he claimed in a later interview. Of a matinee where nobody laughed, there was, he said "not a titter". When the lights came up, the cast realised the entire audience was Japanese. "Oh God", he recalled, "You'd go to your dressing room and someone would pop their head round the door and say, 'Coffee? Tea?' And I'd think, 'An open razor, please.'" In 1989, he starred as Abel Magwitch in the miniseries Great Expectations which was broadcast on ITV in the UK and The Disney Channel in the US. The adaptation of the Dickens' novel also starred Jean Simmons and John Rhys-Davies. He received his fourth Primetime Emmy Award nomination, this time for Outstanding Supporting Actor in a Limited Series or Movie.
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Anthony Hopkins
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1990–1999: ''Pravda'' and film stardom
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1990–1999: Pravda and film stardom
thumb|Isabella Rossellini and Hopkins in Berlin to shoot scenes for The Innocent (1993)
Hopkins won acclaim among critics and audiences as the cannibalistic serial killer Hannibal Lecter in The Silence of the Lambs, for which he won the Academy Award for Best Actor in 1991, with Jodie Foster as Clarice Starling, who also won for Best Actress. The film won Best Picture, Best Director and Best Adapted Screenplay, and Hopkins also picked up his first BAFTA for Best Actor. Hopkins reprised his role as Lecter twice; in Ridley Scott's Hannibal (2001), and Red Dragon (2002). His original portrayal of the character in The Silence of the Lambs has been labelled by the AFI as the number-one film villain. Director Jonathan Demme wanted a British actor for the role, with Foster stating, "Lecter is a manipulator and has a way of using language to keep people at bay. You wanted to see that Shakespearean monster.""Robert DeNiro And Al Pacino Were In The Running To Play Hannibal Lecter". Esquire. Retrieved 1 March 2018 At the time he was offered the role, Hopkins was making a return to the London stage, performing in M. Butterfly. He had come back to Britain after living for a number of years in Hollywood, having all but given up on a career there, saying, "Well that part of my life's over; it's a chapter closed. I suppose I'll just have to settle for being a respectable actor poncing around the West End and doing respectable BBC work for the rest of my life."
Hopkins reprised the role, returning to the iconic villain in adaptations of the first three of the Lecter novels by Thomas Harris. The author was reportedly pleased with Hopkins' portrayal of his antagonist. However, Hopkins stated that Red Dragon (2002) would feature his final performance as the character and that he would not reprise even a narrative role in the latest addition to the series, Hannibal Rising (2007). The following year, Hopkins was featured in Mark Joffe's film Spotswood and the science fiction film Freejack and also played supporting roles as Charlie Chaplin's biographer in Richard Attenborough's biographical drama Chaplin (1992) and Professor Van Helsing in Francis Ford Coppola's horror adaptation Bram Stoker's Dracula (1992).
In 1992, Hopkins starred in Merchant-Ivory's period film based on the E. M. Forster novel Howards End. Hopkins acted alongside Emma Thompson and Helena Bonham Carter where he played the cold businessman Henry Wilcox. The film received enormous critical acclaim, with critic Leonard Maltin calling it "extraordinarily good on every level". The following year, Hopkins reunited with Merchant-Ivory and Emma Thompson in The Remains of the Day (1993), a film set in 1950s post-war Britain based on the novel by Kazuo Ishiguro. David Hunter of The Hollywood Reporter praised Hopkins' performance describing it as "colossal" and a "tour de force". The film was ranked by the British Film Institute as the 64th greatest British film of the 20th century.British Film Institute – Top 100 British Films (1999). Retrieved 27 August 2016 Starring as the butler Stevens, Hopkins named it among his favourite films. He was nominated for an Academy Award for Best Actor for his performance and received the BAFTA Award for Best Actor.
Hopkins portrayed Oxford academic C. S. Lewis in the 1993 British biographical film Shadowlands, for which he was nominated for a BAFTA Award for Best Actor. Also that year he acted opposite Isabella Rossellini in the drama The Innocent (1993) which was adapted from the Ian McEwan novel of the same name. During this period, Hopkins had the chance to work with Bart the Bear in two films: Legends of the Fall (1994) and The Edge (1997). According to trainer Lynn Seus, "Tony Hopkins was absolutely brilliant with Bart...He acknowledged and respected him like a fellow actor. He would spend hours just looking at Bart and admiring him. He did so many of his own scenes with Bart." Hopkins was Britain's highest-paid performer in 1998, starring in The Mask of Zorro and Meet Joe Black, and also agreed to reprise his role as Hannibal Lecter for a fee of £15 million.
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Anthony Hopkins
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2000–2015: Established actor
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2000–2015: Established actor
thumb|Hopkins photographed by Oliver Mark, Berlin 2001
In 2000, Hopkins narrated Ron Howard's live action remake of How the Grinch Stole Christmas. He then reprised the role of Hannibal Lecter in The Silence of the Lambs sequel simply entitled Hannibal (2001). Director Ridley Scott and actress Julianne Moore replaced Jonathan Demme and Jodie Foster who declined to participate in the sequel. Hopkins, who previously starred with Moore in Surviving Picasso (1996), agreed to do the role approving of the script. In the book, Lecter uses bandages to disguise himself as a plastic surgery patient. This was left out of the film because Scott and Hopkins agreed to leave the face alone. Hopkins said: "It's as if he's making a statement—'catch me if you can'. With his big hat, he's so obvious that nobody thinks he's Hannibal Lecter. I've always thought he's a very elegant man, a Renaissance man.":
thumb|left|upright|Lecter T-shirt worn by Hopkins in Hannibal on display at the London Film Museum
In the film, Lecter is first seen in Florence "as the classical Lecter, lecturing and being smooth", according to Hopkins. When the film moves to the U.S., Hopkins changed his appearance by building up muscle and cropping his hair short "to make him like a mercenary, that he would be so fit and so strong that he could just snap somebody in two if they got ... in his way". The film broke international box office records receiving $351 million, but received mixed reviews from critics. Hopkins starred in the third film in the series Red Dragon (2002) alongside Ralph Fiennes, Edward Norton, Harvey Keitel, Emily Watson, and Philip Seymour Hoffman. The film received generally favourable reviews and was a box office hit.
thumb|Hopkins at the 2005 Toronto International Film Festival
In 2003, Hopkins received a star on the Hollywood Walk of Fame.Happy birthday Sir Anthony Hopkins . Retrieved 5 February 2011 Hopkins stated that his role as Burt Munro, whom he portrayed in his 2005 film The World's Fastest Indian, was his favourite. He also asserted that Munro was the easiest role that he had played because both men have a similar outlook on life. In 2006, Hopkins was the recipient of the Golden Globe Cecil B. DeMille Award for lifetime achievement.Lifetime honour for Sir Anthony BBC News (17 November 2005) In 2008, he received the BAFTA Academy Fellowship Award, the highest award the British Film Academy can bestow.Bafta Film Awards 2008: The winners BBC News (10 February 2008) In a 2003 poll conducted by Channel 4, Hopkins was ranked seventh on their list of the 100 Greatest Movie Stars.
On 24 February 2010, it was announced that Hopkins had been cast in The Rite, which was released on 28 January 2011. He played a priest who is "an expert in exorcisms and whose methods are not necessarily traditional". Hopkins, an agnostic who is quoted as saying "I don't know what I believe, myself personally", reportedly wrote a line—"Some days I don't know if I believe in God or Santa Claus or Tinkerbell"—into his character to identify with it.Anthony Hopkins reveals the secret atheist message he put into The Rite. Retrieved 29 September 2014. In 2011, Hopkins said, "what I enjoy is uncertainty. ... I don't know. You don't know."An Interview with Anthony Hopkins; Discussion of Exorcism; CNN Piers Morgan Tonight. (5 February 2011). Retrieved 19 May 2018. On 21 September 2011, Peter R. de Vries cast Hopkins in the role of the Heineken owner Freddy Heineken, in the film about his kidnapping, Kidnapping Freddy Heineken (2015).
Hopkins portrayed Odin, the Allfather or "king" of Asgard, in the 2011 film adaptation of Marvel Comics' Thor and would go on to reprise his role as Odin in Thor: The Dark World in 2013, and again in 2017's Thor: Ragnarok. Hopkins portrayed Alfred Hitchcock in Sacha Gervasi's biopic Hitchcock alongside Helen Mirren who played Hitchcock's wife, Alma Reville. The film focuses on the filming of Psycho and that which followed. He starred in the comedy action film Red 2 (2013) as the main antagonist Edward Bailey. In 2014, he portrayed Methuselah in Darren Aronofsky's Noah. Hopkins played Order of the Witwiccans member Sir Edmund Burton in Transformers: The Last Knight which was released in June 2017.
In October 2015, Hopkins appeared as Sir in a BBC Two production of Ronald Harwood's The Dresser, alongside Ian McKellen, Edward Fox and Emily Watson. The Dresser is set in a London theatre during the Blitz, where an aging actor-manager, Sir, prepares for his starring role in King Lear with the help of his devoted dresser, Norman. Hopkins described his role as Sir as "the highlight of my life. It was a chance to work with the actors I had run away from. To play another actor is fun because you know the ins and outs of their thinking – especially with someone like Sir, who is a diabolically insecure, egotistical man." He spoke again on the impact the role had on him in 2018, "When I was at the Royal National Theatre all those years ago, I knew I had something in me, but I didn't have the discipline. I had a Welsh temperament and didn't have that 'fitting in' mechanism. I would fight, I would rebel. I thought, 'Well, I don't belong here.' And for almost 50 years afterwards, I felt that edge of, 'I don't belong anywhere, I'm a loner.' But in The Dresser, when Ian [McKellen] responded, it was wonderful. We got on so well and I suddenly felt at home, as though that lack of belonging was all in my imagination, all in my vanity".
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Anthony Hopkins
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2016–present: Career resurgence
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2016–present: Career resurgence
Beginning in October 2016, Hopkins starred as Robert Ford in the HBO sci-fi series Westworld where he received a Primetime Emmy Award nomination for his performance. Hopkins starred as Lear in the 2018 television film King Lear acting alongside Emma Thompson, Florence Pugh, and Jim Broadbent which was broadcast on BBC Two on 28 May 2018. Hopkins received a Screen Actors Guild Award nomination for his performance."Trailer: King Lear". BBC. Retrieved 9 June 2018 Vulture stated the film "capture[d] the heart of the classic Shakespeare tragedy" and described Hopkins' performance as "devastating".
In 2019, Hopkins portrayed Pope Benedict XVI opposite Jonathan Pryce as Pope Francis in Fernando Meirelles's The Two Popes. He stated, "The great treasure was working with – apart from [director] Meirelles – Pryce. We're both from Wales. He's from the north, and I'm from the south". The film is set in the Vatican City in the aftermath of the Vatican leaks scandal and follows Pope Benedict XVI as he attempts to convince Cardinal Jorge Mario Bergoglio to reconsider his decision to resign as an archbishop as he confides his own intentions to abdicate the papacy. In August 2019, the film premiered at the Telluride Film Festival to critical acclaim. The film started streaming on 20 December 2019, by Netflix. The performances of Pryce and Hopkins, as well as McCarten's screenplay, received high praise from critics, and all three men received nominations for their work at the Academy Awards, Golden Globes and British Academy Film Awards.
In 2020, Hopkins played a man struggling with Alzheimer's disease in The Father. The film premiered at the Sundance Film Festival where it received critical acclaim, with many critics praising Hopkins's performance and calling him a standout and Oscar frontrunner. The film also stars Olivia Colman as his daughter. It is based on a Tony Award nominated play Le Père by Florian Zeller, who also directed the film. The Father was released on 18 December 2020 by Sony Pictures Classics. In a Q&A at the Telluride Film Festival Hopkins praised both Colman and Zeller saying comparing the working experience saying it "might've been the highlight of my life". Hopkins mentioned how lucky he's been over the past five years working with Ian McKellen in The Dresser, Emma Thompson in King Lear, and Jonathan Pryce in The Two Popes. Hopkins won the BAFTA Award for Best Actor in a Leading Role for his performance in The Father, making it his fourth BAFTA and his third for Best Actor. He also won a second Academy Award for Best Actor for his role, becoming the oldest person to win an acting Oscar. Hopkins did not attend the Oscars ceremony, but accepted the award in a video posted on social media, from Wales, the following day, saying: "Here I am in my homeland in Wales. And at 83 years of age, I did not expect to get this award. I really didn't and am very grateful to the Academy and thank you." He also paid tribute to fellow nominee Chadwick Boseman, who had died the previous year.
In 2022, he acted in James Gray's semi-autobiographical coming of age drama Armageddon Time (2023). In an interview with El País he said that his performance was inspired by his grandfather who had encouraged him to become an actor. Hopkins starred alongside Jeremy Strong and Anne Hathaway. Hopkins received positive reviews for his turn as a kindly elderly grandfather. A.O. Scott of The New York Times wrote, "Hopkins finds the essential grit hiding underneath the twinkle". That same year he reunited with Florian Zeller, acting in The Son (2022) alongside Hugh Jackman. In 2023, Hopkins starred as stockbroker and humanitarian Sir Nicholas Winton in the biographical drama film One Life, and also played Sigmund Freud in Freud's Last Session. Hopkins also appeared in the Netflix science fiction film Rebel Moon directed by Zack Snyder.
In 2024, Hopkins portrayed Herod the Great in the Netflix film Mary.
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Anthony Hopkins
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Other activities
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Other activities
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Anthony Hopkins
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Activism and philanthropy
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Activism and philanthropy
thumb|Panorama of Snowdonia in north Wales which Hopkins described as "one of the most beautiful places in the world and Snowdon is the jewel that lies at its heart. It must be cherished and protected.""Hopkins gives a million to save Snowdonia", BBC. Retrieved 19 October 2011.
Hopkins has offered his support to various charities and appeals, notably becoming President of the National Trust's Snowdonia Appeal, raising funds for the preservation of Snowdonia National Park in north Wales. In 1998 he donated £1 million towards the £3 million needed to aid the Trust's efforts in purchasing parts of Snowdon. Prior to the campaign, Hopkins wrote Anthony Hopkins' Snowdonia, which was published in 1995.Hopkins, Anthony (1995). Anthony Hopkins' Snowdonia. Colin Baxter Photography, 1995 Due to his contributions to Snowdonia, in addition to his film career, in 2004 Hopkins was named among the 100 Welsh Heroes in a Welsh poll.
Hopkins has been a patron of the YMCA centre in his home town of Port Talbot, south Wales, for more than 20 years, having first joined the YMCA in the 1950s."Drama returns to YMCA where Sir Anthony Hopkins started", BBC Wales, 20 July 2010. He supports other various philanthropic groups. He was a Guest of Honour at a Gala Fundraiser for Women in Recovery, Inc., a Venice, California-based non-profit organisation offering rehabilitation assistance to women in recovery from substance abuse. He is also a volunteer teacher at the Ruskin School of Acting in Santa Monica, California. Hopkins served as the Honorary Patron of The New Heritage Theatre Company in Boise, Idaho from 1997 to 2007, participating in fundraising and marketing efforts for the repertory theatre."Anthony Hopkins to kick off $5.4 million fund drive". Arbiter. Retrieved 4 January 2015
Hopkins contributed toward the refurbishment of a £2.3 million wing at his alma mater, the Royal Welsh College of Music & Drama in Cardiff, named the Anthony Hopkins Centre. It opened in 1999."Royal Welsh College of Music & Drama" , The Independent. Retrieved 24 December 2013.
Hopkins is a prominent member of the environmental protection group Greenpeace and as of early 2008 featured in a television advertisement campaign, voicing concerns about whaling in Japan. He has also been a patron of RAPt (Rehabilitation for Addicted Prisoners Trust) since its early days and in 1992 helped open their first intensive drug and alcohol rehabilitation unit at Downview (HM Prison), a women's prison in Surrey, England."Our Team – Patrons: Sir Anthony Hopkins". Forward Trust.org. Retrieved 7 February 2019
Hopkins is an admirer of the late Welsh comedian Tommy Cooper. On 23 February 2008, as patron of the Tommy Cooper Society, he unveiled a commemorative statue in the entertainer's home town of Caerphilly. For the ceremony, he donned Cooper's trademark fez and performed a comic routine.
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Anthony Hopkins
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Composing
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Composing
thumb|Anthony Hopkins Centre at the Royal Welsh College of Music and Drama, Cardiff
In an interview, Hopkins stated, "I've been composing music all my life and if I'd been clever enough at school I would like to have gone to music college. As it was I had to settle for being an actor." In 1986, he released a single called "Distant Star", which peaked at No. 75 in the UK singles chart.
In 2007, he announced he would retire temporarily from the screen to tour around the world. Hopkins has also written music for the concert hall, in collaboration with Stephen Barton as orchestrator. These compositions include The Masque of Time, given its world premiere with the Dallas Symphony Orchestra in October 2008, and Schizoid Salsa.
On 31 October 2011, André Rieu released an album including a waltz which Hopkins had composed in 1964, at the age of 26. Hopkins had never heard his composition, "And the Waltz Goes On", before it was premiered by Rieu's orchestra in Vienna; Rieu's album was given the same name as Hopkins's piece.
In January 2012, Hopkins released an album of classical music, entitled Composer, performed by the City of Birmingham Symphony Orchestra, and released on CD via the UK radio station Classic FM. The album consists of nine of his original works and film scores, with one of the pieces titled "Margam" in tribute to his home town near Port Talbot in Wales.
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Anthony Hopkins
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Directing
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Directing
In 1990, Hopkins directed a film about his Welsh compatriot, poet Dylan Thomas, titled Dylan Thomas: Return Journey, which was his directing debut for the screen. In the same year, as part of the restoration process for the Stanley Kubrick film Spartacus, Hopkins was approached to re-record lines from a scene that was being added back to the film; this scene featured Laurence Olivier and Tony Curtis, with Hopkins recommended by Olivier's widow, Joan Plowright to perform her late husband's part thanks to his talent for mimicry.
In 1995, he directed August, an adaptation of Chekhov's Uncle Vanya set in Wales. His first screenplay, an experimental drama called Slipstream, which he also directed and scored, premiered at the Sundance Film Festival in 2007. In 1997, Hopkins narrated the BBC natural documentary series, Killing for a Living, which showed predatory behaviour in nature. He narrated episode 1 through 3 before being replaced by John Shrapnel.
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Anthony Hopkins
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Artistry and reception
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Artistry and reception
Hopkins is renowned for his preparation for roles. He indicated in interviews that once he has committed to a project, he will go over his lines as many times as is needed (sometimes upwards of 200) until the lines sound natural to him, so that he can "do it without thinking". This leads to an almost casual style of delivery that belies the amount of groundwork done beforehand. While it can allow for some careful improvisation, it has also brought him into conflict with the occasional director who departs from the script or demands what the actor views as an excessive number of takes. Hopkins has stated that after he is finished with a scene, he simply discards the lines, not remembering them later on. This is unlike others who usually remember their lines from a film, even years later."Anthony Hopkins: Lecter and Me" — Red Dragon DVD interview
In the mid-1970s, he started a collaboration with Richard Attenborough who called him "the greatest actor of his generation". Attenborough, who directed Hopkins on five occasions, found himself going to great lengths during the filming of Shadowlands (1993) to accommodate the differing approaches of his two stars (Hopkins and Debra Winger), who shared many scenes. Whereas Hopkins preferred the spontaneity of a fresh take and liked to keep rehearsals to a minimum, Winger rehearsed continuously. To allow for this, Attenborough stood in for Hopkins during Winger's rehearsals, only bringing him in for the last one before a take. The director praised Hopkins for "this extraordinary ability to make you believe when you hear him that it is the very first time he has ever said that line. It's an incredible gift."
Renowned for his ability to remember lines, Hopkins keeps his memory supple by learning things by heart such as poetry and Shakespeare. In Steven Spielberg's Amistad (1997), Hopkins astounded the crew with his memorisation of a seven-page courtroom speech, delivering it in one go. An overawed Spielberg could not bring himself to call Hopkins "Tony" and insisted on addressing him as Sir Anthony throughout the shoot.
In a 2016 interview with the Radio Times, Hopkins spoke of his ability to frighten people since he was a boy growing up in Port Talbot, Wales. "I don't know why but I've always known what scares people. When I was a kid I'd tell the girls around the street the story about Dracula and I'd go 'th-th-th' (the sucking noise which he reproduced in The Silence of the Lambs). As a result, they'd run away screaming.""Anthony Hopkins reveals his scary Hannibal Lecter was born on the streets of Port Talbot when he was a boy". Wales Online. Retrieved 1 March 2018 He recalled going through the script of Silence of the Lambs for the first time with fellow cast members. "I didn't know what they were going to make of it but I'd prepared it—my first line to Jodie Foster was: 'Good morning. You're one of Jack Crawford's aren't you?' Everyone froze. There was a silence. Then one of the producers said, 'Holy crap, don't change a thing'." On Hopkins's approach to playing villains, Miranda Sawyer in The Guardian writes, "When he portrays deliberately scary people, he plays them quietly, emphasising their sinister control."
Speaking on his favourite performances which inspired him in his own approach to acting, Morgan Freeman mentioned Hopkins' portrayal of the butler Stevens in The Remains of the Day. Discussing how he learnt "stillness" from José Ferrer, Freeman continued, "It’s what I learn from the great actors that I work with. Stillness. That’s all and that’s the hardest thing. The other actor still like that is Anthony Hopkins. Learning how to be still, to really be still and let life happen–that stillness becomes a radiance. It’s all about eloquent stillness. I’ve told Hopkins that that performance was one of the great lessons for me as an actor."
Hopkins is a well-known mimic, adept at turning his native Welsh accent into whatever is required by a character. In the 1991 restoration of Spartacus, he recreated the voice of his late mentor Laurence Olivier in a scene for which the soundtrack had been lost. His interview on the 1998 relaunch edition of the British television talk show Parkinson featured an impersonation of comedian Tommy Cooper. Hopkins has said acting "like a submarine" has helped him to deliver credible performances in his thrillers. He said, "It's very difficult for an actor to avoid, you want to show a bit. But I think the less one shows the better."
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Anthony Hopkins
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Personal life
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Personal life
Hopkins has a residence in Malibu, California."Anthony Hopkins's letter to Breaking Bad star Bryan Cranston", The Guardian. Retrieved 31 December 2015. In January 2025, his two neighbouring homes in Pacific Palisades, Los Angeles, were destroyed by the Palisades Fire. He moved to the United States once before, during the late 1970s, to pursue his film career, but returned to London in the late 1980s. However, he decided to return to the US following his 1990s success. Retaining his British citizenship, he became a naturalised American citizen on 12 April 2000, with Hopkins stating: "I have dual citizenship; it just so happens I live in America".
Hopkins has been married three times. He was married to actress Petronella Barker from 1966 to 1972, Jennifer Lynton from 1973 to 2002, and Stella Arroyave since 2003. Hopkins met Arroyave, a Colombian-born antiques dealer, in the early 2000s, and he credits her with helping him overcome his feelings of depression at the time. On Christmas Eve 2013, he celebrated his 10th wedding anniversary by having a blessing at a private service at St Davids Cathedral in St Davids."Hannibal star Sir Anthony Hopkins makes a trek back to his childhood home in Margam", South Wales Evening Post. Retrieved 8 January 2013. He has a daughter from his first marriage. The two are estranged; when asked if he had any grandchildren, he said, "I don't have any idea. People break up. Families split and, you know, 'Get on with your life.' People make choices. I don't care one way or the other." In another interview, he said, "I guess I am selfish. I have not been a good husband or father."
Hopkins is a recovering alcoholic; he has stayed sober since just after Christmas 1975. He said, "I made that quantum leap when I asked for help. I just found something and a woman talked to me and she said, just trust in God. And I said, well, why not?" When asked, "Did you literally pray?" Hopkins responded: "No, I didn't. I think because I asked for help, which is a form of prayer." In January 2020, when asked if he was still agnostic, he responded, "Agnosticism is a bit strange. An agnostic doubts and atheism denies. I'm not a holy Joe; I'm just an old sinner like everyone else. I do believe more than ever now that there is a vast area of our own lives that we know nothing about. As I get older, I can cry at the drop of a hat because the wonderful, terrible passion of life is so short. I have to believe there's something bigger than me. I'm just a microbe. That, for me, is the biggest feeling of relief – acknowledging that I am really nothing. I'm compelled to say, whoever's running the show, thank you very much."
Hopkins quit smoking using the Allen Carr method."Celebrity Clients: Endorsements" . Allen Carr. Retrieved 4 January 2015 In 2008, he embarked on a weight loss programme, and by 2010, he had lost 5st 10 lb (80 lb or 36 kg). In January 2017, in an interview with The Desert Sun, Hopkins said that he had been diagnosed with Asperger syndrome three years earlier, but that he was "high end". In 2020, he said that "it's a great gift, actually".
He has a pet cat named Niblo, which he adopted in Budapest. Hopkins eschews meat and prefers a pescatarian diet.
He is a fan of the BBC sitcom Only Fools and Horses, and once remarked in an interview how he would love to appear in the series. Writer John Sullivan saw the interview, and with Hopkins in mind created the character Danny Driscoll, a local villain. However, filming of the new series coincided with the filming of The Silence of the Lambs, making Hopkins unavailable. The role instead went to Roy Marsden.
Commenting on the loss of his Los Angeles home, in the 2025 Palisades fire, Hopkins posted a message on Instagram, supporting those affected, and saying "the only thing we take with us is the love we give".
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Anthony Hopkins
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Acting credits and awards
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Acting credits and awards
thumb|upright|Hopkins at the 2009 Tuscan Sun Festival
Hopkins was appointed a CBE in 1987 and was knighted by Queen Elizabeth II for "services to the arts" at Buckingham Palace in 1993. In 1988, he was awarded an honorary D.Litt. degree and in 1992 received an honorary fellowship from the University of Wales, Lampeter. He was made a freeman of his home town, Port Talbot, in 1996.
He has received numerous accolades for his performances, including two Academy Awards, four BAFTA Awards, a Critics' Choice Movie Award, two Primetime Emmy Awards and a Laurence Olivier Award as well as nominations for eight Golden Globe Awards and seven Screen Actors Guild Awards. In receiving the Oscar for Best Actor for his role in The Father (2020), he became the oldest nominee and winner of the award.
Hopkins has also been honoured with various lifetime achievement awards for his work in film and television. In 2006, Gwyneth Paltrow presented him with the Golden Globe Cecil B. DeMille Award. In 2008, Richard Attenborough presented Hopkins with the BAFTA Fellowship for lifetime achievement from the British Academy of Film and Television Arts. Hopkins has also received a star on the Hollywood Walk of Fame in 2003.
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Anthony Hopkins
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See also
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See also
List of oldest and youngest Academy Award winners and nominees
List of British Academy Award nominees and winners
List of actors with Academy Awards nominations
List of actors with two or more Academy Award nominations in acting categories
List of actors with two or more Academy Awards in acting categories
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Anthony Hopkins
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References
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References
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Anthony Hopkins
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External links
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External links
Category:1937 births
Category:Living people
Category:20th-century Welsh male actors
Category:21st-century Welsh male actors
Category:Actors awarded knighthoods
Category:Alumni of the Royal Academy of Dramatic Art
Category:Alumni of the Royal Welsh College of Music & Drama
Category:American people of Welsh descent
Category:Autistic actors
Category:Autistic musicians
Category:BAFTA fellows
Category:Best Actor Academy Award winners
Category:Best Actor BAFTA Award winners
Category:Best Actor BAFTA Award (television) winners
Category:British actors with disabilities
Category:Cecil B. DeMille Award Golden Globe winners
Category:Commanders of the Order of the British Empire
Category:Cool Cymru
Category:Critics' Circle Theatre Award winners
Category:David di Donatello winners
Category:Drama Desk Award winners
Category:Honorary members of the Royal Academy of Music
Category:Knights Bachelor
Category:Laurence Olivier Award winners
Category:Outstanding Performance by a Lead Actor in a Miniseries or Movie Primetime Emmy Award winners
Category:People educated at Cowbridge Grammar School
Category:People educated at West Monmouth School
Category:People from Port Talbot
Category:People with Asperger syndrome
Category:Welsh expatriate male actors in the United States
Category:Welsh male composers
Category:Welsh male film actors
Category:Welsh male Shakespearean actors
Category:Welsh male stage actors
Category:Welsh male television actors
Category:Welsh people with disabilities
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Anthony Hopkins
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Table of Content
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Short description, Early life and education, Career, 1960–1979: Theatre roles and film debut, 1980–1989: National Theatre and acclaim, 1990–1999: ''Pravda'' and film stardom, 2000–2015: Established actor, 2016–present: Career resurgence, Other activities, Activism and philanthropy, Composing, Directing, Artistry and reception, Personal life, Acting credits and awards, See also, References, External links
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Ardal O'Hanlon
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short description
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Ardal O'Hanlon (; born 8 October 1965) is an Irish comedian, actor, and author. He played Father Dougal McGuire in Father Ted (1995–1998), George Sunday/Thermoman in My Hero (2000–2006), and DI Jack Mooney in Death in Paradise (2017–2020). His novel The Talk of the Town was published in 1998.
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Ardal O'Hanlon
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Early life
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Early life
O'Hanlon was born in Carrickmacross, County Monaghan, the son of Fianna Fáil TD and physician Rory O'Hanlon and Teresa (née Ward). He is the third of six children, and has three brothers and two sisters.
O'Hanlon was schooled in Blackrock College in Dublin and graduated, in 1987, from the National Institute for Higher Education, Dublin (now Dublin City University), with a degree in communication studies.
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Ardal O'Hanlon
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Career
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Career
Together with Kevin Gildea and Barry Murphy, O'Hanlon founded the International Comedy Cellar, upstairs in the International Bar on Dublin's South Wicklow Street. Dublin had no comedy scene at the time. As a stand up, O'Hanlon won the Hackney Empire New Act of the Year competition in 1994. For a time he was the presenter of The Stand Up Show.
O'Hanlon was cast as Father Dougal McGuire in Father Ted (1995–1998). During filming, O'Hanlon went to buy shoes. Still being in costume, the seller thought he was a real priest and offered the footwear for free. In 1995 he received the Top TV Comedy Newcomer at the British Comedy Awards for this role. In 1995, he appeared (as Father Dougal) in a Channel 4 ident ("Hello, you're watching ... television"), and during Comic Relief on BBC1. This was followed by the award-winning short comedy film Flying Saucer Rock'n'Roll. In a 2019 interview, O'Hanlon admitted that he had attempted to distance himself from Father Ted once the show had finished.
O'Hanlon moved into straight acting alongside Emma Fielding and Beth Goddard in the ITV comedy-drama Big Bad World, which aired for two series in summer 1999 and winter 2001. He also played a minor role in The Butcher Boy as Joe's (Francie's best friend) father, and appeared in an episode of the original Whose Line is it Anyway?.
In 2000, O'Hanlon starred in the comedy series My Hero, in which he played a very naive superhero from the planet Ultron. His character juggled world-saving heroics with life in suburbia. He stayed in the role until the first episode of series 6 in July 2006, when he was replaced by James Dreyfus during the same episode.
O'Hanlon also provided the voice of the lead character in the three Christmas television cartoon specials of Robbie the Reindeer. He appeared in the 2005 BBC One sitcom Blessed, written by Ben Elton; at the 2005 British Comedy Awards, it was publicly slated by Jonathan Ross, albeit in jest. Towards the end of 2005, he played an eccentric Scottish character, Coconut Tam, in the family based film, The Adventures of Greyfriars Bobby. He has also appeared on radio, including an appearance on Quote... Unquote on BBC Radio 4 on 18 July 2011. Appropriately, one of his questions concerned a quotation from Father Ted. In 2015, he appeared as incompetent angel Smallbone in the sitcom The Best Laid Plans, on the same channel.
In 2006, O'Hanlon wrote and presented an RTÉ television series called Leagues Apart, which saw him investigate the biggest and most passionate football rivalries in a number of European countries. Included were Roma vs Lazio in Italy, Barcelona vs Real Madrid in Spain, and Galatasaray vs Fenerbahce in Turkey. He followed this with another RTÉ show, So You Want To Be Taoiseach? in 2007. It was a political series in which O'Hanlon gave tongue-in-cheek advice on how to go about becoming Taoiseach of Ireland.
He appeared in the Doctor Who episode "Gridlock", broadcast on 14 April 2007, in which he played a catlike creature named Thomas Kincade Brannigan. O'Hanlon appears in series 3 of the TV show Skins, playing Naomi Campbell (Lily Loveless)'s politics teacher named Kieran, who attempted to kiss her. He then went on to form a relationship with Naomi's mother (Olivia Colman). O'Hanlon plays the lead role in Irish comedy television programme Val Falvey, TD on RTÉ One. In 2012, he performed in the Edinburgh Fringe.
In February 2011, O'Hanlon returned to the Gate Theatre, Dublin starring in the Irish premiere of Christopher Hampton's translation of Yasmina Reza's God of Carnage, alongside Maura Tierney. Later that year, he appeared in the comedy panel show Argumental.
O'Hanlon has written a novel, The Talk of the Town (known in the United States as Knick Knack Paddy Whack), which was published in 1998. The novel is about a teenage boy, Patrick Scully, and his friends.
In February 2015, he officially launched the 2015 Sky Cat Laughs Comedy Festival, which took place in Kilkenny from 28 May to 1 June. In 2015 he played the role of Peter the Milkman in the Sky One sitcom After Hours.
On 2 February 2017, it was announced he would play the lead role in the BBC crime drama Death in Paradise taking the role of DI Jack Mooney following Kris Marshall's departure the same day. He announced his intention to leave the series in early 2020 and was replaced by Ralf Little. Starting in 2024, he has reprised the role in spin-off series Return to Paradise.
On 25 November 2021, it was announced that he would participate in series 13 of Taskmaster. He finished in 4th place ahead of Judi Love.
In 2023, he played Uncle Jack in the National Theatre's production of Dancing at Lughnasa by Brian Friel, alongside Siobhan McSweeney and Tom Vaughan-Lawlor.
In January 2024, he presented his first Irish language show, Inis na nIontas, on TG4, exploring the islands around the coast of Ireland.
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Ardal O'Hanlon
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Personal life
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Personal life
O'Hanlon met his wife Melanie as a teenager. They have three children. He is a supporter of Leeds United.
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Ardal O'Hanlon
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Filmography
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Filmography
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Ardal O'Hanlon
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Film
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Film
Year Title Role Notes 1996 Moll Flanders Gentleman From East Chiswick 1997 The Butcher Boy Mr. Purcell 1998 Flying Saucer Rock'n'Roll Eddie Johnny Short film 2002 Another Bobby O'Hara Story... Bobby O'Hara Short film 2005 The Adventures of Greyfriars Bobby Coconut Tam 2007 Blind Eye Immigration Official Short film 2008 Tales of the Riverbank Hammy Hamster (voice) Direct-to-DVD 2009 Wide Open Spaces Myles 2016 Donkeys Derek Short film Handsome Devil Dan Roche Twice Shy Brendan O'Meara 2021 Rian McCarthy Short film 2024 My Freaky Family Nerlin Flood TBA Fran the Man Jim O'Dea Post production
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Ardal O'Hanlon
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Television
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Television
Year Title Role Notes 1995–1998 Father Ted Father Dougal McGuire Series 1–3 (25 episodes) 1996 Whose Line Is It Anyway? Himself Series 8; Episode 7 1997 Top of the Pops Himself - Guest Presenter Series 34; Episode 5 1999 Hooves of Fire Robbie the Reindeer (voice) Television film The Comedy Trail: A Shaggy Dog Story George Sunday / Thermoman Television Special 1999–2001 Big Bad World Eamon Donaghy Series 1–3 (16 episodes) 2000–2006 My Hero George Sunday / Thermoman Series 1–6 (45 episodes) 2002 Legend of the Lost Tribe Robbie the Reindeer (voice) Television film 2005 Blessed Gary Chandler Episodes 1–8 2006 Leagues Apart Himself - Presenter Episodes 1–6 2007 Close Encounters of the Herd Kind Robbie the Reindeer (voice) Television film Doctor Who Thomas Brannigan Series 3; Episode 3: "Gridlock" 2008 Who Do You Think You Are? Himself Series 1; Episode 4: "Ardal O'Hanlon" 2009 Val Falvey, TD Val Falvey Episodes 1–6 Skins Kieran Series 3; Episodes 1 & 6: "Everyone" and "Naomi" 2010 Michael McIntyre's Comedy Roadshow Himself Series 2; Episode 6: "Leeds" 2013 London Irish Chris 'Da' Lynch Mini-series (4 episodes) 2014 Lily's Driftwood Bay Bull Dozer Series 1; Episode 24: "Stop! Watch" 2015 Celebrity Mastermind Himself - Contestant Series 14; Episode 1 Cucumber Brian McCoy Mini-series; Episode 4 Nelly & Nora Dad (voice) 24 episodes After Hours Peter Hannigan Episodes 1–6 2016 Ireland with Ardal O'Hanlon Himself - Presenter Episodes 1–3 2017–2020 Death in Paradise DI Jack Mooney Series 6–9 (24 episodes) 2019 Showbands: How Ireland Learned to Party Himself - Presenter Television film 2019–2022 Derry Girls Eamonn Series 2; Episode 4: "The Curse" and Series 3; Episode 7: "The Agreement" 2021 Would I Lie to You? Himself - Panellist Series 15; Christmas Special 2022 Rosie Molloy Gives Up Everything Conall Series 1; Episodes 1–5 Taskmaster Himself - Contestant Series 13; Episodes 1–10 Countdown Himself Dictionary Corner. Series 86 & 88 (10 episodes) 2023 The Woman in the Wall Dara Episodes 2 & 3: "Show Thyself" and "Knock Knock" 2023–2024 Extraordinary Martin (voice) Series 1 & 2 (8 episodes) 2024 Celebrity Catchphrase Himself - Contestant Series 9; Episode 9: "Chris Bisson, Ruth Madeley and Ardal O'Hanlon" 2024-present Return to Paradise DI Jack Mooney Episodes: "R.I.P. Tide" and "Oh Mine Papa" 2024Richard Osman's House of Games Himself - Contestant Series 8; Episodes 51–55 (Week 11) 2025Sherlock & Daughter Mr. Halligan Series regular
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Ardal O'Hanlon
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Awards
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Awards
Year Name 1994 Hackney Empire New Act of the Year 1995 Top TV Comedy Newcomer at the British Comedy Awards
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Ardal O'Hanlon
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References
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References
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