How Plasma TV's Work and their Pro's and Con's

How a Plasma Display Works

Plasma Televisions are made up of plasma gas which is Xenon and Neon Gas. These
gases are placed in tiny cells or pixels across the screen. The interior of the pixels
and sub-pixels are coated with phosphor. Each pixel has three sub-pixel
representing a primary color (red, green and blue). These cells (pixels) are contained
between two pieces of glass. Connected to each plate is an electrode, these
electrodes extend the whole length of the plates of glass forming a grid on both
plates of glass. These electrodes are also connected to a computer in the display. To
create an image the computer sends a current on the electrode and the
corresponding position on the grid to charge the gases in the pixels which causes
the gases to become ionized which in turn depending on the length of time the
current in on causes the gases to give off an ultraviolet ray. This ultraviolet ray then
causes the phosphor coating of the pixels to light up the appropriate color. With all
of these cells or pixels lighting up at the same time they create a smooth image.

Advantages of a Plasma Display

How Plasma TV's Work and their Pro's and Con's

The advantages of this technology is that since the whole screen can be lit up at the
same time and every pixel can be used and "on" we get very smooth images. Also
since each pixel in the screen is lit independently the images are very bright and can
be seen from wide angles. Finally the biggest advantage of Plasma Televisions is
they can be made very large and extremely thin with most displays these days
measuring no more than 4 cm in depth. The most common display size these days
is the 42" with 50" - 60" at the high end, this is not up to Projection TV's yet but the
quality in image that is gained and the fact that the screens are very thin makes
them my choice for best display at this time. The largest Plasma screen in the world
was just shown at the CES (Consumer Electronics Show) in Las Vegas. It measured
103" and was made by Matsushita Electrical Industries (Panasonic). Samsung is
currently in second place with their 102" inch Plasma Panel. For the consumer the
largest panel you can buy is made by Samsung measuring 80" and costing a
whopping 0,000. Imagine what the wife would say if you brought that bad boy
home.

The only major con's with Plasma displays would be their price compared to a
Projection screens. Compared to LCD's Plasma's are much cheaper per inch. There is
a myth going around that plasma displays do not last long and will need to be
replaced quite often. Although they do eventually loose their brightness and the
colors will fade when the half-life of the gases are reached, most displays these
days are rated at half lives of 50,000 hours. With normal viewing of 4 hours a day
this would not be reached for 35 years and at 8 hours a day right around 15 years
the set will last. So unless you watch television 24 hours a day expect these displays
to last you many years.

PRO'S:

large screen sizes

price per inch is reasonable

superb color reproduction

CON'S:

price compared to projections is high

power consumption

some models make a buzzing noise (especially when display whites or light grays)

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