How Does a Television Work?

An analog television works by transferring electromagnetic waves into sound and light energy. The TV box works much like any receiver, in that it takes in electrical impulses sent from elsewhere and changes those bits of information into something people can hear and see. You can see a picture on a television because the cathode ray tube, in side older televisions, emits or fluoresces light not visible to the naked eye. The term "watch the tube," refers to the cathode ray tube present in most modern-day television sets.

Color on a television set is created by mixing various light beams. It basically works by regulating red, blue and green light in different patterns against something called a "phosphor sheet." TVs all have sheets placed behind the glass portion of it. Black and white televisions usually only have one phosphor sheet while color TVs will have three. By manipulating the "color burst," or composite video impulse, you can literally open up a suppressed TV signal for viewing.

High-definition technology found in digital and HDTVs has revolutionize the television industry. Digital television reduces image quality problems associated with most analog and cathode ray tube (CRT) devices. A digital TV holds more pixels which improves resolution. Digital TVs display "progressively," rather than convey images as interlaced, as is the case with analog televisions. Progressive video or imaging allows pictures to be shown all at once rather than in portions.

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