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How Do Plasma Televisions Work?
By Tom Ace
Plasma TVs have been one of the most popular home entertainment
solutions on the market for several years. They offer outstanding
resolution and a quality picture and are usually capable of displaying
HDTV signals, allowing you to watch all of your favourite HDTV
programs. Compared to rear projection TVs, plasma technology
offers some of the best viewing angles- no need to fight over the best
seat anymore- and offer uniform screen brightness.
But how does plasma technology work? It's pretty simple. Some
form of inert gas- say Xenon, for example, is inserted between two
plates, which are held together, between which are over two million
pixels, capable of producing a mind-boggling array of colors. The gas
is then energized by a charge which turns it into a viscous substance,
creating an ultraviolet light, which allows each pixel to display the
appropriate color. Unlike rear-projection TVs, each pixel in a plasma
display contains red, blue, and green phosphors, there is no need for a
cathode-ray tube. In traditional TVs, the cathode-ray tube, or CRT,
fires electrodes to the screen, where they excite phosphor atoms
causing them to light up, thus creating a picture. The CRT is bulky
and is responsible for the box-shape of traditional televisions. For
example, if you want to increase the size of the screen in a CRT, you
must also create a larger cathode-ray tube, therefore making the whole
TV that much bigger- and bulky.
One drawback to plasma technology is the inability to recharge each
individual pixel. Each pixel is an independently sealed entity, as is the
plasma display panel and the gas, so if a pixel, or a group of pixels, fail
or darken, the entire panel unit must be replaced.
Fortunately, however, you can expect your plasma display to last at
least 60,000 hours of playing time, before the pixels begin to darken.
So, in layman's terms, if you watch your TV for four hours a day, you
can expect the panel to last around eighteen years.
Plasma technology has greatly increased the quality of home
entertainment, ushering in a new era of television technology.
About the Author
Tom Ace is the founder of Plasma tv Resources a website providing information on plasma televisions
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