The LCD is a flat and ultra-thin display device, which is composed of a certain number of color or black and white pixels, placed in front of a light source or reflection. Liquid crystal displays have very low power consumption, so they are highly favored by engineers and are suitable for electronic devices that use batteries. Its main principle is to stimulate the liquid crystal molecules to produce dots, lines, and surfaces with the back light tube to form a picture. So what are the technical advantages of LCD screens? The editor of Zhilingxin will introduce to you.
Technical advantages of LCD screens:
1. Smaller size and lighter weight
The traditional CRT monitor uses the picture tube technology to image, it needs to have a built-in vacuum picture tube, and then equipped with an electron gun at the end, so that the length is generally more than 30 cm, so the volume of the whole display is of course larger. The liquid crystal display uses liquid crystal materials, and then uses the corresponding imaging technology to achieve the display purpose. There is no need to install a picture tube inside the display, and the volume is of course small.
2, the relative display area is larger
Due to the limitation of display technology, traditional CRT monitors indicate a size smaller than the display area of the fluorescent screen. Generally, a 15-inch CRT monitor has a size of 15 inches, but its real visual range It may be only about 14.1 inches, and the 17-inch display may only have 15 to 16 inches of display area left. However, due to the different imaging principles of liquid crystal displays, the size indicated is the actual display area. For example, the display area of Samsung's 15-inch LCD is a complete 15-inch, which is equivalent to the display area of a 17-inch CRT monitor. , If the prices of the two are similar, of course it is much more cost-effective to buy an LCD monitor.
LCD
3, zero radiation, no flicker
CRT monitors use cathode picture tubes for imaging. The electron beam contained in it generates a lot of static electricity and radiation during operation. The faster the speed of the electron beam, the greater the radiation. The long-term use of the human body will cause damage to the eyes and skin. Causes myopia, skin allergies and other problems. Since the liquid crystal display uses liquid crystal materials, there is no need to use electron beams when working, so there are no static electricity and radiation that affect vision. In addition, a picture of a CRT display is formed by scanning. Only when the scanning frequency reaches a certain value, there is no flicker. However, the liquid crystal display does not require a scanning process. A picture is formed almost at the same time, even if the refresh frequency It is very low and there will be no flicker at all.
4, low power consumption, strong anti-interference ability
In addition to the power consumption of the circuit and the picture tube, the CRT display also has the power consumption of the display screen, and the liquid crystal display is mainly the power consumption of the backlight and the circuit, and the power consumption of the display screen can be ignored. In addition, because the liquid crystal display does not use a picture tube and an electron gun like a CRT display, it does not need to consider the high radiation effect caused by increasing the electron beam emission from the electron gun, but only obtains the brightness through the backlight emitted by the fluorescent tube, so it has stronger resistance. Interference ability, even in an environment with relatively concentrated light, you will receive a good display effect.
5, the picture quality is higher
Traditional CRT monitors mostly adopt analog display mode, and the signal output of the display adopts analog output mode, which may cause image loss during the transmission process, resulting in a decline in picture quality, while the signal transmission of liquid crystal display adopts digital mode, which is directly by the graphics card. Outputting digital signals will not cause signal loss, but most LCD displays still use VGA interfaces for analog displays, and only a few manufacturers have set up digital video signal interfaces.
6, the use of functions is more intelligent
Because of the different materials and technologies used in liquid crystal displays, some of its parameters are generally relatively fixed, which requires the performance of the display to be adjusted more intelligently. In this regard, each manufacturer has its own mature technology.
7. A leap in applied materials
The traditional CRT monitor uses an ultra-thick glass display. Although the outer surface is flat like a liquid crystal display, the inner surface is somewhat curved, which seems to be concave, and the image will be slightly distorted. The basic material used in liquid crystal displays is liquid crystal-a substance that has both the fluidity of liquid and the regular arrangement of crystals. When the liquid crystal is heated to a certain extent, it will become a transparent liquid. After cooling, it will show the characteristics of crystals. Because the characteristics of liquid crystals are between solid and liquid, it not only has the optical characteristics of solid crystals, but also has the flow characteristics of liquid. The liquid crystal display uses this characteristic to achieve the purpose of imaging.
