An LED filament consists of multiple LED dice connected in series on a common longitudinal substrate that form a thin rod reminiscent of a traditional incandescent filament. These are being used as a low cost decorative alternative for traditional light bulbs that are being phased out in many countries. The filaments require a rather high voltage to light to nominal brightness, allowing them to work efficiently and simply with mains voltages. Often a simple rectifier and capacitive current limiting are employed to create a low-cost replacement for a traditional light bulb without the complexity of creating a low voltage, high current converter which is required by single die LEDs. Usually they are packaged in a sealed enclosure with a shape similar to lamps they were designed to replace (e.g. a bulb), and filled with inert nitrogen or carbon dioxide gas to remove heat efficiently.
An LED filament consists of multiple LED dice connected in series on a common longitudinal substrate that form a thin rod reminiscent of a traditional incandescent filament . These are being used as a low cost decorative alternative for traditional light bulbs that are being phased out in many countries . The filaments require a rather high voltage to light to nominal brightness , allowing them to work efficiently and simply with mains voltages . Often a simple rectifier and capacitive current limiting are employed to create a low - cost replacement for a traditional light bulb without the complexity of creating a low voltage , high current converter which is required by single die LEDs . Usually they are packaged in a sealed enclosure with a shape similar to lamps they were designed to replace ( e.g. a bulb ) , and filled with inert nitrogen or carbon dioxide gas to remove heat efficiently .
What helps LED filaments remain low cost?
What helps LED filaments remain low cost ?
a simple rectifier
a simple rectifier