The liquid crystal monitor, or LCD (Liquid Crystal Display), is a flat and thin display device that consists of a certain number of color or black and white pixels and is placed in front of the light source or the reflector. LCD monitors are very low in power consumption, so they are favored by engineers and are suitable for electronic devices using batteries. Its main principle is to stimulate the liquid crystal molecules to produce dots, lines, and surfaces to match the back light tube to form a picture.

       The difference between LCD monitor and TV and monitor is mainly manifested in three degrees: image definition, color reduction and machine stability. This is due to the application requirements of the monitor and the application environment. On the one hand, the monitor often needs a static image. It must reproduce the image information of the camera, including a lot of details, such as the local features of the object, the details can not be clearly reproduced, and the purpose of monitoring is lost, which requires a high image sharpness of the monitor; On the one hand, because the details usually include color features, it is a key requirement of the monitor, so the monitor must have a higher degree of color reduction. Because the monitor usually needs to work for a long time, the requirement of the stability of the product is very high.

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