Five advantages of LCD liquid crystal display:
1. Zero radiation, low energy consumption, low heat dissipation
The display principle of LCD liquid crystal display is to realize the restoration of the picture by twisting the deflection angle of the liquid crystal molecules in the liquid crystal pixels to achieve the background light. Exceeded. Moreover, the structure and circuit of the machine screen are simple, the modularization and the high integration of the chip are sufficient to minimize the electromagnetic radiation generated when the circuit is working. This design directly reduces the power consumption of the circuit, and the heat generation is also very small. Although the LCD screen may produce slight electromagnetic radiation during work, it is easy to solve it by shielding the circuit. Since the CRT display screen takes into account heat dissipation, it is not allowed to drill holes in the shielding cover to cause radiation leakage.
2, slim and lightweight
It was the appearance of the LCD screen that made the invention of the portable computer possible. Similarly, although desktop LCD screens are larger in size and weight than laptop computers, they are insignificant compared to the bulky and heavy CRT screens. Compared with a 15-inch display screen, the depth of a CRT display screen is generally close to 50 cm. With the changes in consumer opinions and living environment, people have higher and higher requirements for the volume and weight of household electric screen products. With its inherent advantages of slimness and lightness, LCD screens have become the most likely display device to break the monopoly of CRT displays.
3, accurately restore the image
The liquid crystal display adopts a direct digital addressing display mode, which can directly correspond the video signal on the screen one by one according to the "address" signal in the signal level after AD conversion of the video signal output by the graphics card. Displayed on the liquid crystal pixels. The CRT display screen relies on the electromagnetic field generated by the deflection coil to control the periodic scanning of the electron beam on the screen to achieve the purpose of displaying images. Since the trajectory of the electron beam is easily affected by the environmental magnetic field or geomagnetism, the absolute positioning of the electron beam on the screen cannot be achieved. Therefore, CRT display screens are prone to phenomena such as geometric distortion and linear distortion that cannot be eliminated fundamentally. The LCD screen does not have this possibility. The LCD screen can display the picture perfectly on the screen without any geometric distortion or linear distortion.
4, the display characters are sharp
The picture is stable and does not flicker. The unique display principle of the liquid crystal display determines that each pixel on the screen emits uniformly, and the red, green and blue pixels are closely arranged. The video signal is directly sent to the back of the pixel to drive the pixel to emit light, so there will be no inherent characteristics of the traditional CRT display. Convergence and poor focus. Therefore, the text display effect on the LCD screen is quite different from the traditional CRT screen. The font of the LCD screen is very sharp, and there is no such phenomenon as the blurring of the font and the font color when the CRT screen displays the text. Moreover, since the liquid crystal display keeps emitting light after power on, the backlight works at high frequency, and the display screen is stable without flickering, which is beneficial to using the computer for a long time. The CRT display screen relies on the electron beam to repeatedly hit the phosphor to achieve light, which will cause the brightness to flicker periodically. It is easy to cause eye discomfort after prolonged use.
5. Easy to adjust the screen
The direct addressing display mode of the liquid crystal display makes the screen adjustment of the liquid crystal display do not require too much geometric adjustment, linear adjustment and position adjustment of the displayed content. The LCD screen can automatically adjust the screen to the best position after the chip calculation is very convenient. You only need to press the "Auto" button to complete this step. The cumbersome adjustment of the CRT display screen is eliminated. You only need to manually adjust the brightness and contrast of the screen to make the screen work in the best condition.
