Friday, March 11, 2011

FPD (Flat Panel Display)

FPD (Flat Panel Display) is relative to the large body of traditional CRT TVs in terms of a class to compare the TV, including LCD (Liquid Crystal Display), PDP (Plasma Display Panel), OLED (Organic Light Emitting Display), SED (Surface-conduction Electron-emitter Display), and other major technology of television products.LCD TV mainly adopts TFT LCD display panel type, its main composition of fluorescent tubes, including, guide plate, partial plate, filter plate, glass substrates, deserve to film, LCD materials, thin model transistor, etc. First LCD must use back light, also is the fluorescent tubes (CCFL) or LED lamp illuminant, these projected out light will first after a partial plate and then through liquid crystal, then liquid crystal molecules arrangement and change the penetrate LCD light Angle. Then these light next must pass in front of color filter with another piece of partial tabula rasa. So just change stimulates the voltage liquid can be used to control the last occurrence of light intensity and color, and then can the LCD panel will change a shades of color combinations.
PDP Plasma Display Panel (-) is the use of put between two glass substrates of inert gas discharge, produce electronic excited by the ultraviolet radiation by the coating of red, green, blue fluorescent powder, appear all sorts of color lightspot picture. PDP appearance, make medium-large size (about 40 ~ 70 inch) displays the development and application of produce huge changes, with its ultra-thin volume and weight is far less than that of traditional big size CRT television, in high resolution, not affected by magnetic field, perspective wide and active luminous etc than tft-lcd characteristics, complete with multimedia products light thin short and small demand.
Better Ray Tube, CRT (cathode Ray Tube) can be said to be projection technique "ancestor". Use CRT technology projector also called 3 guns projector, the working principle and the CRT display no different, its hair light sources and imaging are CRT. CRT projector (figure 1) cathode rays strike by electron beam scanning imaging surface, make the shot to shine on phosphor formed imaging image, then transfer to planes. Use the DLP projection television CRT technology the working principle and the projector is roughly same, but it USES is over-head projectors and not of the projector cast way. Before
Flat TV embodies the TV ultra-thin, super light, high definition TV development trend.
Flat, the definition of plasma and LCD key difference lies - plasma is gas imaging, LCD liquid crystals imaging, mainly imaging mechanism different caused both in contrast and clarity above gap. As to screen the difference between the same size of plasma or LCD, basically be to see the screen imaging effect, the same LCD between quality have very big difference.
Plasma merit is the contrast high-level trenchant, weakness is high-power, comparative use very much power. LCD TV is the advantage of low power, low radiation, the color is good, defect is reaction time slow, image bad-tail serious, administrative levels feeling brightness is not strong.

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