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1. brightness: the liquid crystal module itself is a substance that cannot emit light. it is between liquid and solid, and needs other light sources to emit light.

the early liquid crystal display was composed of two upper and lower lamps. with the development of technology, it has spread to four lamps or even six tubes. the four-tube design is divided into three types: one is that there is one tube on each of the four sides, but the disadvantage is that there is a black shadow in the middle. the second type is the way in which the four lamps are arranged horizontally from top to bottom, and the latter is the "u" type. in fact, it is the four lamps produced by the two lamps in disguise. the six-tube design actually uses three lamps. the manufacturer bends the three tubes into a "u" shape and then places them in parallel to achieve the effect of six tubes.

2. contrast: control ics, filters, and orientation film accessories can affect the contrast of lcd panels when they are manufactured. in general, a contrast ratio of 350:1 is ok. but if it is in some areas, only liquid crystal displays can achieve high contrast requirements. therefore, when choosing, you should choose the one that suits you according to your needs.

3. viewing angle: the viewing angle of the lcd has always been a problem that bothers you. when the backlight passes through the polarizer, the liquid crystal, and the alignment layer, the output light is also directional. therefore, when viewing a liquid crystal display from a relatively large angle, it cannot see its original color, and even can only see all white or all black. in order to solve this problem, people began to develop wide-angle technology. so far, the more popular technologies are tn+film, ips (in-plane-switching) and mva (multi-domain vertical alignment).

4. response time: response time refers to the response speed of the liquid crystal display to the input signal, usually in milliseconds (ms). for liquid crystal displays, the display of less than 40ms will have obvious "tailing" or "afterimage" phenomenon, which makes people feel chaotic. if you want the image to be smooth, you need to achieve 60 frames per second.