Monday, May 9, 2011

PDP(Plasma Display Panel)

PDP(Plasma Display Panel) is adopted in recent years the rapid development of plasma flat screen technology of a new generation of display device.
introduction
Plasma display and says, are the plasma display CRT (cathode ray tube), LCD (LCD) the latest generation after screen, its characteristic is thickness is extremely thin, resolution preferred. The work principle of speaking, plasma technology compared with other display mode in there exist obvious differences in structure and composition of the lead. Its working principle similar common fluorescent lamp and TV color image, by each independent phosphor pixel glow, so the image combination becomes bright, bright, clean and clear. In addition, plasma display device is the most prominent feature of ultra-thin, can easily do it more than 40 inches for the big screen, and completely plane than 100 mm thickness (actually this is also one of its weakness: namely, can't do much smaller. Current minimum only 42 inches, finished product for big screen needs only user, and home theater, etc).
Plasma Display Panel (PDP) - put, from the 1990s began to enter commercial production, its performance index, since such continuously improve yield, while our prices are going down. Especially since 2005, the price rise further, from the earlier mainly by commercial into a household primarily.
Imaging principle
Plasma display technology in the imaging principle is arranged on the screen thousands of small low-pressure gas chamber sealing, through the current inspire make its issued invisible to the naked eye ultraviolet light, then uv light touch attack on behind glass of red, green, blue 3 color fluorescent body naked eye can see out the visible light, and this imaging.
superiority
Thickness thin, high resolution, take up the space is little, and can be used as the home, represents a wall-mounted TV development trend of future computer monitors.
Working principle
In two pieces of thin glass is applied between the mixed gases filling, to produce ions gas voltage and then make plasma gas discharge, and substrate react the fluorescence body, produce color image. It takes plasma tube as light emitting components, a large number of plasma pipe arrangement together constitute the plasma screens, each corresponding to each small indoor are filled with neon xenon gas, in plasma tube with high pressure between electrodes after sealing between two layers of glass in the gas plasma tube small room can produce ultraviolet light, and stimulate the flat-panel display on three different schemes in red, green, blue issued visible. Each plasma tube as a pixel, pixels light and shade and by these changes of color combination produces various gray and color images, similar to the tube to shine. Plasma TVS, say again "wall hung TV", do not suffer magnetic and magnetic field, have fuselage fine thin, light, screen big, bright color, clearly, high brightness, distortion degree of small, visual feeling comfortable, save a space, etc.
Basic structure
An overview
With VGA display level of plasma displays, its former glass with 480 separately on scanning and maintain transparent electrodes, there are 2556 after glass surface (852 x 3) rows electrodes, these electrode connected directly with data driven circuit board. According to display different leels of the number will have change, electrode.
Glass structure after
Behind glass, making data electrodes, covered in a layer of dielectric. Red, green, blue phosphor respectively in different data arranged between different electrode, phosphor with barrier alternate with. The plasma display device early three phosphors, due to the width of the consensus of red, green and blue three phosphors each are not identical, luminous efficiency three kinds of color mix colors produces color range and brightness difference compared with the CRT is larger. Called "asymmetric unit structure" patent technology according to the three kinds of the luminous efficiency of phosphor, will make the width phosphor in color, brightness and reductive degree than previous product has greatly improved, the screen can reach peak brightness 1000cd/m2 above, the machine can reach peak brightness 400cd/m2 over the (with EMI filter glass), contrast can achieve 10,000:1 (darkroom, no external protection screen).
Former glass structure
In the first glass, pairs of production is scanning and maintain transparent electrodes, covered in a layer of dielectric, covering the dielectric on protective MgO style. Before and after the span, sealing and capacit filling of the low pressure gas, between two glass discharge.
Pixel structure
With 42-inch plasma displays, for example, the size of plasma displays have 1 226 880 a pixel.
The son of plasma display field driving system brightness controls by changing the plasma discharge time to achieve, namely child field drive technology. A child field including initialization, write and maintain three stages.

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