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Until approximately 2006, most of the relatively affordable consumer large screen TVs up to 100 in (250 cm) used rear-projection technology. A variation is a video projector, using similar technology, which projects onto a screen. Three types of projection systems are used in projection TVs.
Mechanical TV usually only produced small images. It was the main type of TV until the 1930s. Vacuum tube television, first demonstrated in September 1927 in San Francisco by Philo Farnsworth , and then publicly by Farnsworth at the Franklin Institute in Philadelphia in 1934, was rapidly overtaking mechanical television.
The UHF channel 60 allocation to Aurora was originally occupied by WLXT-TV, which broadcast from May 16, 1969, to July 17, 1970. WLXT was an independent station that abruptly closed after 14 months of attempting to serve its suburban coverage area, but it was notable for the people that passed through it, particularly news director Christine Lund, who became a well-known news anchor in Los ...
On July 3, 2013, Sony announced the release of their 4K Ultra HD Media Player with a price of US$7.99 for rentals and US$29.99 for purchases. [137] [138] The 4K Ultra HD Media Player only worked with Sony's 4K Ultra HD TVs. [138] On July 15, 2013, the CTA published CTA-861-F, a standard that applies to interfaces such as DVI, HDMI, and LVDS. [139]
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The word television comes from Ancient Greek τῆλε (tele) 'far' and Latin visio 'sight'. The first documented usage of the term dates back to 1900, when the Russian scientist Constantin Perskyi used it in a paper that he presented in French at the first International Congress of Electricity, which ran from 18 to 25 August 1900 during the International World Fair in Paris.