Thursday, June 07, 2012

Plasma TV

A plasma screen contains
literally millions of gas-filled
cells trapped between two
... pieces of glass. An electrical
grid zaps these cells and causes
the gases to ionize. The ionized gases, in turn, cause a layer of
phosphor on the viewer’s side
layer of glass to light up.
Despite their compact
dimensions, you can find
plasma HDTVs in 42-, 50-, and even 60-plus-inch sizes.
Imagine a 4- or 5-inch-deep
HDTV that spans 5 feet
diagonally, and you can see
the instant appeal of plasma.
Plasma HDTVs don’t rely on a light bulb shining through or
reflecting off of something.
Plasma brightness is even
better than CRT’s in some
ways because the picture is
evenly bright across the entire screen. In a CRT, on the other
hand, you always have some
slight difference in brightness
as the electron beam reaches
different parts of the screen.
The finest plasma TVs have such high resolutions that
they look like nothing more
than beautiful film images. All
the pixels on the screen light
up simultaneously. You can
have progressive HDTV sources and non-HDTV sources
displayed to full advantage on
a plasma HDTV. Plasma
displays have a good picture
even when you’re sitting “off
axis”. This is a huge benefit for smaller rooms, where viewers
may sit relatively far off to
the sides of the screen, at
wider angles.

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