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Television set
A '''television set''' (usually called a '''television''', '''TV set''', or simply '''TV''') is a device used to view televisionbroadcasts.
History
File:Murphy TV 1951.JPG|thumb|right|200px|British Murphy black and white 405 line Television receiver 1951.
[[File:Dimensia IO.jpg|thumb|150px|right|The RCA Dimensia and RCA Lyceum TV sets of the 1980s were early models to feature a wide variety of input/output terminals]]
In History of television#Electromechanical television|television's electromechanical era, commercially made televisions were sold from 1928 to 1934 in the United Kingdom,[Early British Television: Baird, Television History: The First 75 Years.] United States, and Russia.[Pre-1935, Television History: The First 75 Years. The French model shown does not appear to have entered production.] The earliest commercially made televisions sold by Baird in the UK in 1928 were radios with the addition of a television device consisting of a neon tube behind a mechanically spinning disk (the Nipkow disk) with a spiral of apertures that produced a red postage-stamp size image, enlarged to twice that size by a magnifying glass. The Baird "Televisor" was also available without the radio. The Televisor sold in 1930–1933 is considered the first mass-produced television, selling about a thousand units.[Pre-1935 Baird Sets: UK, Television History: The First 75 Years.]
The first commercially made electronic televisions with cathode ray tubes were manufactured by Telefunken in Germany in 1934,[Telefunken, Early Electronic TV Gallery, Early Television Foundation.][1934–35 Telefunken, Television History: The First 75 Years.] followed by other makers in France (1936),[1936 French Television, Television History: The First 75 Years.] Britain (1936),[1936 Baird T5, Television History: The First 75 Years.] and America (1938).[Communicating Systems, Inc., Early Electronic TV Gallery, Early Television Foundation.][America's First Electronic Television Set, Television History: The First 75 Years.] The cheapest of the pre-World War II factory-made American sets, a 1938 image-only model with a 3-inch (8 cm) screen, cost US5, the equivalent of United States dollar|US$1,863 in 2007. The cheapest model with a 12-inch (30 cm) screen was 5 (,633).[American TV Prices, Television History: The First 75 Years.]
An estimated 19,000 electronic televisions were manufactured in Britain, and about 1,600 in Germany, before World War II. About 7,000–8,000 electronic sets were made in the U.S.[Annual Television Sales in USA, Television History: The First 75 Years.] before the War Production Board halted manufacture in April 1942, production resuming in August 1945.
Television usage in the United States skyrocketed after World War II with the lifting of the manufacturing freeze, war-related technological advances, the gradual expansion of the television networks westward, the drop in television prices caused by mass production, increased leisure time, and additional disposable income. While only 0.5% of U.S. households had a television in 1946, 55.7% had one in 1954, and 90% by 1962.[Number of TV Households in America, Television History: The First 75 Years.] In Britain, there were 15,000 television households in 1947, 1.4 million in 1952, and 15.1 million by 1968.
Components
Modern televisions consist of a Display device|display, Antenna (radio)|antenna or radio frequency (RF) input (often an F connector), and a tuner. The existence of a television tuner in a display device distinguishes it from a "monitor" - which receives signals that are already processed. Additionally TVs almost always include speakers. Most modern TVs also feature additional inputs for devices such as DVD players, video game consoles, and headphones; the most common types are RCA connector|RCA (for composite and component video), mini-DIN (for S-Video), HDMI, and SCART and D-terminal can be found in Europe and Japan respectively. Some high-end TVs have Ethernet ports to receive information from the Internet, like stocks, weather, or news. Most TVs made since the early 1980s also feature an infra-red sensor in order to detect the signals sent by remote controls.
Display technologies
Televisions today use various display technology such as Cathode ray tube|CRT, LCD, Plasma display|Plasma, Digital Light Processing|DLP, and more recently OLED. Some front projectors, which feature TV tuners, can also be considered televisions.
See also
- Color television
- HDTV
- Viera Cast
References
Category:Television technology
be-x-old:Тэлевізар
fiu-vro:Televiisor
zh-yue:電視
Related Images
Sources: StartLearningNow, Wikipedia | Usage license: GNU FDL
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