Color television is a television transmission technology that includes information on the color of the picture, so the video image can be displayed in color on the television set. It is an improvement on the earliest television technology, monochrome or black and white television, in which the image is displayed in shades of grey (greyscale). Television broadcasting stations and networks in most parts of the world upgraded from black and white to color transmission in the 1960s and 1970s. The invention of color television standards is an important part of the history of television, and it is described in the technology of television article.
History[]
In Japan, Kenjiro Takayanagi demonstrated a CRT television that received images with a 40-line resolution, in 1925.[1] By 1927, he improved the resolution to 100 lines, which was unrivaled until 1931.[2] By 1928, he was the first to transmit human faces in half-tones on a CRT display.[3] By 1935, he had invented the first all-electronic CRT television.[4]
Color LCD[]
The first color LCD display was invented by Sharp Corporation's Shinji Kato and Takaaki Miyazaki in May 1975,[5] and then improved by Fumiaki Funada and Masataka Matsuura in December 1975.[6] The first color LCD televisions were invented as handheld televisions in Japan. In 1980, Hattori Seiko's R&D group began development on color LCD pocket televisions.[7] In 1984, Epson released the ET-10, the first full-color, pocket LCD television.[8] The same year, Citizen Watch,[9] another Seiko Hattori subsidiary (along with Epson), introduced the Citizen Pocket TV,[7] a 2.7-inch color LCD TV, with improved picture quality compared to Casio's model,[9] and the first TFT LCD display.[7] By 1985, two other Seiko Hattori subsidiaries had also introduced TFT LCD handheld televisions, with Seiko's color micro-TV and the Epson ELF.[7]
In 1988, Sharp Corporation introduced the first commercial full-color, large LCD television, a 14" model with active matrix addressing using thin-film transistors (TFT).[10] The release of Sharp's large LCD TV in 1988 led to Japan launching a color LCD television industry. In the late 1990s, the industry began shifting away from Japan, towards South Korea and Taiwan.[10]
See also[]
- Triniscope
- Beam-index tube
References[]
- ↑ Kenjiro Takayanagi: The Father of Japanese Television, NHK (Japan Broadcasting Corporation), 2002, retrieved 2009-05-23.
- ↑ High Above: The untold story of Astra, Europe's leading satellite company, page 220, Springer Science+Business Media
- ↑ Albert Abramson, Zworykin, Pioneer of Television, University of Illinois Press, 1995, p. 231. ISBN 0-252-02104-5.
- ↑ Popular Photography, November 1990, page 5
- ↑ JPS51139582A patent: Liquid crystal display units
- ↑ JPS5279948A patent: Liquid crystal color display device
- ↑ 7.0 7.1 7.2 7.3 Spin, Jul 1985, page 55
- ↑ A HISTORY OF CREATING INSPIRATIONAL TECHNOLOGY, Epson
- ↑ 9.0 9.1 Popular Science, May 1984, page 150
- ↑ 10.0 10.1 Hirohisa Kawamoto (2013), The history of liquid-crystal display and its industry, HISTory of ELectro-technology CONference (HISTELCON), 2012 Third IEEE, Institute of Electrical and Electronics Engineers, DOI 10.1109/HISTELCON.2012.6487587
Further reading[]
- Block diagram of color television sets
- Wells, Alan (1997), World Broadcasting: a comparative view, Greenwood Publishing Group, p. 173, ISBN 1-56750-245-8
External links[]
- Television in Color, April 1944 one of the earliest magazine articles detailing the new technology of color television
- TV Color Controversy, LIFE Feb. 27, 1950 Article about FCC debating which color television system to approve for US broadcasts.