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Unclear images on the LCD splicing screen mainly include: low brightness, poor edge focus, ghosting (image smearing), interference fringe stacking (signal source resolution is too high), or image jaggies (drop frame), etc. The image display is a part of a system. Video signal sources such as DVDs, camcorders, and computers are processed through control transmission products such as matrix switchers, distributors, and signal transmission cables, and then displayed on the display terminals. If the display effect is not ideal, it cannot be immediately determined that there is a problem with a product. 
The debugging methods commonly used in LCD splicing screen display are as follows:
Excluded first: You can perform the inspection first, assuming there is a problem in a certain segment, and then check it out to eliminate it; if the problem is not resolved, you must also exclude all devices one by one, first check the resolution of the signal source and the display terminal. Whether the resolution is the same or not, the only way to form a point-to-point display, the brightness of the image can also be significantly improved, if it is a video signal depends on whether the system can adapt to the display terminal, if you can not meet the requirements of the display terminal, you can pass Exchange equipment or add conversion equipment to change the nature of the signal.
Second, see if the bandwidth of the splitter and matrix switcher and its impedance to the signal source can make the loss of the image within the standard range. Finally, to see whether the display device's focusing and convergence is normal, and whether the signal processing circuit is good, the most important is: during the construction, the signal connector is strictly controlled, the interface is reliable, the cable is neat, the power line and the signal line are separated, and Reliable earthing, if not using UPS power supply, the grounding of the AC power supply is to achieve a common ground, and both ends of the line are well marked to facilitate inspection and management.
In addition, the image has ghosting, and it is necessary to check whether the transmission cable is too long and too thin. The solution is to change the line, or increase the signal amplifier and other equipment. Poor focus can adjust the display terminal and so on.
The LCD splicing screen is one of the display screens most favored by users at present, and its application field has spanned various fields such as entertainment, security, and broadcasting. In fact, the installation process of LCD splicing screen LCD splicing screen system hardware installation is usually relatively simple, do not spend too much time; and debugging is relatively complex, then in actual operation encountered image display is not clear in the end how to operate it? This article will be a simple analysis of the LCD display splicing image display is not clear.