LCD splicing video wall system hardware installation is usually relatively simple, without spending too much time; and debugging is relatively complicated. The following is a debugging explanation for the unclear display of video wall system images. Unclear phenomenon of LCD mosaic images mainly include: low brightness, poor edge focus, ghosting (image smearing), interference fringe stacking (signal source resolution is too high) or the image has a sawtooth (drop frame), if the display effect Unsatisfactory, it is not immediately possible to determine a problem with a product. 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.
The commonly used debugging method is as follows:
Excluded from the first step: you can first perform inspections in sections, assuming that there is a problem in one section, and then check it out to eliminate it. After the problem is solved, you can save time on other parts of the inspection. If the problem is not resolved, all devices must be eliminated one by one. Check whether the resolution of the signal source is the same as the resolution of the display terminal. Only in this way can you form a point-to-point display. The brightness of the image can also be significantly improved if it is a video signal. It depends on whether the system format can adapt to the display terminal. If the display terminal cannot meet the requirements, the nature of the signal can be changed by changing the device or adding a conversion device. If the scaler is used, the video signal VIDEO can be increased. VGA 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, see if the display device's focus and convergence is normal, and whether the signal processing circuit is good. The most important thing is: during construction, the signal connector is strictly controlled, the interface is firm, the cables are arranged neatly, the power line is separated from the signal line, and it must be grounded reliably. If the UPS power supply is not used, the grounding of the AC power supply must be achieved. The two ends of the line are marked to facilitate inspection and management.
Analysis: According to the phenomenon of failure, if not synchronized, check the synchronization interface and transmission cable of the equipment, and check the synchronization frequency range between the signal source and the display terminal. By analyzing and shortening the inspection time, the image is ghosted. Look at whether the transmission cable is too long or 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 commonly used debugging method is as follows:
Excluded from the first step: you can first perform inspections in sections, assuming that there is a problem in one section, and then check it out to eliminate it. After the problem is solved, you can save time on other parts of the inspection. If the problem is not resolved, all devices must be eliminated one by one. Check whether the resolution of the signal source is the same as the resolution of the display terminal. Only in this way can you form a point-to-point display. The brightness of the image can also be significantly improved if it is a video signal. It depends on whether the system format can adapt to the display terminal. If the display terminal cannot meet the requirements, the nature of the signal can be changed by changing the device or adding a conversion device. If the scaler is used, the video signal VIDEO can be increased. VGA 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, see if the display device's focus and convergence is normal, and whether the signal processing circuit is good. The most important thing is: during construction, the signal connector is strictly controlled, the interface is firm, the cables are arranged neatly, the power line is separated from the signal line, and it must be grounded reliably. If the UPS power supply is not used, the grounding of the AC power supply must be achieved. The two ends of the line are marked to facilitate inspection and management.
Analysis: According to the phenomenon of failure, if not synchronized, check the synchronization interface and transmission cable of the equipment, and check the synchronization frequency range between the signal source and the display terminal. By analyzing and shortening the inspection time, the image is ghosted. Look at whether the transmission cable is too long or 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.
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