1. Zero radiation, low energy consumption, low heat dissipation
The principle of LCD display is to reverse the deflection angle of liquid crystal molecule in the liquid crystal pixel to achieve the background light and restore the picture. It does not exist the internal components with ultra-high voltage like CRT, so that the X-ray caused by high voltage does not exceed the standard. Moreover, the machine structure and circuit are simple, modular and highly integrated enough to minimize the electromagnetic radiation generated by the circuit when it works. Such a design directly reduces the power consumption of the circuit and the calorific value is very small. Although LCD may produce slight electromagnetic radiation at work, it can be easily solved by shielding circuit. Because of the consideration of heat dissipation, CRT display should not drill holes in the shield to cause radiation leakage.
2. Slim and light
It is the appearance of LCD that makes the invention of laptop possible. Similarly, desktop LCDs are bigger in size and weight than laptops, but they are wilder than bulky CRT displays. Compared with 15-inch displays, CRT displays generally have a depth of close to 50 centimeters, while the latest liquid crystal display NF-1500MA from Great White Shark is less than 5 centimeters deep. With the change of consumption viewpoint and living environment, people are demanding more and more on the volume and weight of household appliances. LCD has become the most likely display device to break the monopoly of CRT display because of its inherent advantages of thin and lightweight.
3. Accurate restoration of images
LCD is a direct digital addressing display mode. It can convert the video signal output from the display card through AD, and display the video signal one by one on the LCD pixels on the screen according to the "address" signal in the signal level. CRT displays use the deflection coil to generate electromagnetic field to control the periodic scanning of electron beams on the screen to achieve the purpose of displaying images. Because the trajectory of the electron beam is susceptible to the influence of environmental magnetic field or geomagnetic field, the absolute positioning of the electron beam on the screen can not be achieved. Therefore, CRT displays are prone to geometric distortion and linear distortion, which can not be eliminated fundamentally. This is not possible for liquid crystal displays. LCD can display the picture perfectly on the screen without any geometric distortion or linear distortion.
