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The first televisions that can be considered commercial were of a mechanical type and were based on a rotating disc, which contained a series of holes arranged in a spiral and that allowed a "line by line" exploration to be made of a strongly illuminated image.
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It was marketed from 1928 to 1934 in the United Kingdom, the United States, and the USSR.
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The mechanical system was soon displaced by the use of the CRT (cathode ray tube) as an image generating element, which allowed to achieve better resolutions and scanning speeds.
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they were widely disseminated and began to be marketed in Teveloped countries.
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The biggest step that has been taken in the technological evolution of television from color television was digital television.
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TDT (Digital Terrestrial Television) begins to give its first broadcasts in the United States.
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System that uses broadband connections and is distributed by subscription of pay TV signals.
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High definition televisions, internet and 3D technology compatible with mobile devices.
