THE HISTORY OF THE TV





Mechanical Televisions
Mechanical televisions relied on rotating disks to transmit images from a transmitter to the receiver. Both the transmitter and receiver had rotating disks. The disks had holes in them spaced around the disk, with each hole being slightly lower than the other.
Resultado de imagen de mechanical tvTo transmit images, you had to place a camera in a totally dark room, then place a very bright light behind the disk. That disk would be turned by a motor in order to make one revolution for every frame of the TV picture.

Electronic Televisions

Resultado de imagen de electronic tvThere’s a reason we stopped using mechanical televisions: electronic televisions were vastly superior.
Electronic televisions rely on a technology called a Cathode Ray Tube (CRT) as well as two or more anodes. The anodes were the positive terminals and the cathode was the negative terminal.





Color Television 1950

Resultado de imagen de color tvColor television traces its roots as far back as 1904, when a German inventor received a patent for color television. However, that inventor did not actually have a working color television – it was just a patented idea.
A conceptualized color television system appeared in 1925 from inventor Vladimir Zworykin. However, this system was never converted into reality. All attempts to convert it into reality did not succeed.
Resultado de imagen de digital tv 
Digital TV
Digital television (DTV) is the transmission of television signals, including the sound channel, using digital encoding, in contrast to the earlier television technology, analog television, in which the video and audio are carried by analog signals. It is an innovative advance that represents the first significant evolution in television technology since color television in the 1950s.

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