Prima PH50D8, Руководство по обслуживанию

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Briefing on the operation principle of the plasma TV series PS-42D8
Plasma plane screen technology represents the state-of-the-art and it’s also the best choice for high quality picture
and large purely place screen. Plasma display screen PDP is a display unit employing gas discharge. This screen uses
plasma tube as its light emission component. The faceplate (panel)of PDP consists of many image elements (plasma
tubes) for example, the 42”pdp now on the market consists of 852*480 image elements. Each image element in turn
consists of three kinds of image sub-elements. Each image element is actually a plasma tube. These tubes are present
respectively in red, green and blue colors, as shown in fig. I. Each small chamber that corresponds to each plasma tube is
filled with neon and xenon gases. After applying high voltage between the plasma electrodes, the gases in the small
chambers of the plasma tubes sealed in the two layers of glass will produce ultraviolet so as to excite the three basic color
(red, green and blue) fluorescent powder to emit visible light. Each plasma tube acts as an image element. From the
composition of these image elements in different brightness, darkness and colors result the pictures and images of
various grays and colors, which is very similar to the light emission of display tube. Plasma technology is obviously
different form other display methods and is more advanced in structure and formation. Its working principle is similar to
normal daylight lamp. The TV color picture is composed of the light emitted from various independent fluorescent powder
image elements and therefore the picture is fresh and gaily colored, bright, clean and clear. Furthermore the most
outstanding feature of plasma TV is that it can be made super thin and it’s easy to make TV sets of more than 40” with
completely plane big screen but in thickness less than 100 mm (Our Model PS-42D8 is only 79mm thick and it’s the
thinnest in the market at present.)
Figure I Structure of Image Element
Plasma TV model PS-42D8 series of XOCECO is designed and developed by XOCECO itself. In
terms of the main CMOS chip this series of TV set employs PW181 made by Pixelworks Company.
Bus
dielectric
ITO electrode
clapboard
Fluoresce powder nce
Address
electrod
Front panel
Back board
Magnesia layer