So far, there are a lot of refurbished and fake products in the society, if we use such products, there may be a great hidden danger, so far may not be able to see, but a long time will slowly expose some problems, so how do we identify whether the LCD screen is the original? How to identify whether the LCD screen has a quality problem? 1. Check whether the brightness of the screen is appropriate and whether the image is flashing. Generally speaking, if it is the original LCD screen, the brightness will be relatively uniform, and the image will not flicker phenomenon. 2. Check the frequency of the refresh. The original LCD splicing screen has 120 HZ frequency refresh frequency: DID product 120Hz frequency LCD display technology, can effectively solve the tail and fuzzy phenomenon in the process of fast image operation, enhance the clarity and contrast of the image, make the picture more clear, people's eyes will not be tired for a long time. 3. Check the digital engine function of the LCD splicing screen products. The original and genuine LCD screen products have a powerful V 12 digital engine function, which can make the image more realistic, stable and bright. The refurbished product images are less visible in color, and the screen is less stable. 4. Check the signal input function. Generally speaking, the original genuine product has three signal input formats: single VGA, composite video, single YPbPr format and other signal format input. If the quality is poor, only one or two types can be used. 5. A variety of screen display modes, the original genuine LCD screen display functions are diverse, with a variety of screen combination splicing mode, can be expanded to 64 ways ofcombination splicing, can be arbitrary switch combination of each unit. The fake product display mode is much less.