Widescreen images are displayed within a set of aspect ratios (relationship of image width to height) used in film, television and computer screens. In film, a widescreen film is any film image with a width-to-height aspect ratio greater than the standard 1.37:1 Academy aspect ratio provided by 35 mm film. For television, the original screen ratio for broadcasts was in fullscreen 4:3 (1.33:1). Largely between the 1990s and early 2000s, at varying paces in different nations, 16:9 (1.78:1) widescreen TV displays came into increasingly common use. They are typically used in conjunction with high-definition television (HDTV) receivers, or Standard-Definition (SD) DVD players and other digital television sources. With computer displays, aspect ratios wider than 4:3 are also referred to as widescreen. Widescreen computer displays were previously made in a 16:10 aspect ratio (e.g. 1680 × 1050), but now are usually 16:9 (e.g. 1920 × 1080). Film History Widescreen was first used for The Corbett-Fitzsimmons Fight (1897). This was not only the longest film that had been released to date at 100 minutes, but also the first widescreen film being shot on 63 mm Eastman stock with five perforations per frame. Widescreen was first widely used in the late 1920s in some short films and newsreels, and feature films, notably Abel Gance's film Napoleon (1927) with a final widescreen sequence in what Gance called Polyvision. Claude Autant-Lara released a film Pour construire un feu (To Build a Fire, 1928) in the early Henri Chrétien widescreen process, later adapted by Twentieth Century-Fox for CinemaScope in 1952. The experimental Natural Vision widescreen process developed by George K. Spoor and P. John Berggren used 63.5 mm film and had a 2:1 aspect ratio. In 1926, a Natural Vision film of Niagara Falls was released. In 1927, the Natural Vision process was used in the production of The American The Flag Maker. It was directed by J. Stuart Blackton and starred Bessie Love and Charles Ray, but was never released theatrically. On May 26, 1929, Fox Film Corporation released Fox Grandeur News and Fox Movietone Follies of 1929 in New York City in the Fox Grandeur process. Other films shot in widescreen were the musical Happy Days (1929) which premiered at the Roxy Theater, New York City, on February 13, 1930, starring Janet Gaynor and Charles Farrell and a 12-year-old Betty Grable as a chorus girl; Song o' My Heart, a musical feature starring Irish