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The advantage and the weakness of the display of LCD
The advantage of the liquid crystal display
The traditional display of CRT develops for several decades, its technique structure principle limitted its further development.Proper and a few important weakness of the vacuum cathode ray tube causes the display of CRT more and more difficult to adapt the consumer to the further exaltation that display request, by this time, a different soldier 突 of flat panel display rise, among them replacing the display of CRT to show that the position that the terminal 垄 break is a liquid crystal display in the PC most probably.
The liquid crystal display manifestation principle and display of CRTs are different.Opposite display of CRT to say, the liquid crystal display naturally owns the following bsolute dvantage:
1 and zero radiations, low consume the ability, spread the heat small.The manifestation principle of the liquid crystal display is pass to turn round the LCD pixel is of LCD member deflect the angle to come to the background light but the realization revivification appearance of, its nonexistent elephant CRT so the inner part have a machine of extra high voltage piece, being unlikely to appear because the x that high pressure cause shoots the super mark of line.And the machine structure electric circuit is simple, the mold piece turn and chip of high gather turn good enough to the electric circuit work time electromagnetism radiation of creation decline lowest.Such design lowers the 功 of the electric circuit to consume directly, having fever the quantity also very small.Liquid crystal display although at work the time may produce the slight electromagnetism radiation, pass to shield the electric circuit to solve very easily.But display of CRT because of in consideration of spread hot, can not drill a hole to cause radiate in shield cover of reveal.
2, the 纤 is thin and agile.Exactly the emergence of the liquid crystal display, just make the invention of the portable computer make possible.Same, although a type liquid crystal display toes compare the portable computers to all want on the physical volume and weights big and some,, opposite that stupid and heavy display of CRT to say that was a small sorcery to see the big sorcery.Compare with 15 inches of displays, the depth of the display of CRT nears to 50 rices of 厘 generally, but the depth of the liquid crystal display MAs NF-1500s that big and white 鲨 lately release but not to 5 rices of 厘 !Along with consume the change of the standpoint and living environment, the people's physical volume to the home appliances product and weights have more and more high request.Liquid crystal display with the display piece that its thin and agile and born advantage of 纤 becomes breaking the CRT display 垄 to break the position most probably.
3, precision revivification picture.Liquid crystal display adoption of is the manifestation method that the direct figures looks for the address, it gives or get an electric shock even medium" address" signal according to the signal after can show the card output's video frequency signal through the AD conversion, direct come out the video frequency signal is 11 rightnesses of should of on the LCD on the screen pixel manifestation.But the display of CRT control the electron beam by deflecting the coil creation electromagnetism field is periodic on the screen of scan to attain to show the picture of purpose.Because the sport track of the electron beam easily under the influence of the environment magnetic field or terrestrial magnetism, can't attain the electron beam in absolute fixed position on the screen.So several HE2 SHI of the easy emergence appearance of display of CRT is really, the line loses the phenomenon that true etc. can't basically remove.But the liquid crystal display is then the nonentity this is possible.The liquid crystal display can is perfect the appearance to present out on the screen, but really will not appear several any HE2 SHIs, the line really lose.
4, the manifestation character list keenness.The appearance stability does not gleam.The LCD shows that the special manifestation principle comes to a decision its screen to give out light up the each pixel even, and three 基 color pixels of red turquoise blue are close to arrange, the video frequency signal sends to the pixel back directly of give out light by driving the pixel, so will not appear the traditional display of CRT proper will gather and focuse the bad corrupt practice.So, the text on the liquid crystal display shows that the result and traditional display of CRTs compare to have originally great difference.The form of written of the liquid crystal display is very sharp-edged, having no CRT display manifestation text completely originally the form of written that time appear is misty, the form of written is suffused with the color etc. phenomenon.And, because of the liquid crystal display is after switch on electricity always at give out light, carry on the back the light light to work under the high 频 , show that appearance stability but don't gleam, be advantageous to the long-playing usage computer.But display of CRT is depend the electron beam bumps shot to the fluorescence powder again to attain to give out light of, will cause a periodic gleam thus.With long hours usage after easily result in person's eye of unwell.
5, the screen regulates the convenience.The liquid crystal display looks for the address manifestation method directly, making the screen of the liquid crystal display regulate do not need several too manies to regulate to regulate and show that the position of the contents regulate with line.The liquid crystal display regulate the screen to the best position after can pass the chip calculation very conveniently the auto, this step you need to click" Auto" key once only and can complete.Saved the display of CRT that but regulate trivially.You only need to move to regulate the bright degree and the contrast degrees of the screen and can make machine work in the best appearance.