The device image is not clear mainly including: low brightness, poor edge focus, ghosting (image smearing), interference stacking sense (signal source resolution is too high) or the image has jagged (dropped frames).
We cannot immediately say that there is a problem with a certain product. The image display is a system that mainly includes video signal sources such as DVDs, cameras, computers, etc., and control transmission products such as matrix switches, distributors, and signal transmission cables. Display terminal.
The common solutions are as follows:
Exclusion method: Exclude all devices one by one, first check whether the resolution of the signal source is consistent with the resolution of the display terminal. Only in this way can the point-to-point display be formed, and the brightness of the image can be significantly improved. If it is a video signal, it depends on it Whether the format can be adapted to the display terminal. If the requirements of the display terminal are not met, you can change the nature of the signal by exchanging equipment or adding conversion equipment. For example, the use of a scaler can improve the video signal VIDEO to a VGA signal. Secondly, see if the bandwidth of the splitter and matrix switcher and its impedance to the signal source can minimize the image loss within the standard distance range. Finally, see if the focus and convergence of the display device is normal, and whether the signal processing circuit is good. The most important thing is: during the construction, the signal connector is strictly controlled, the interface is secure, the wiring is neat, the power line is separated from the signal line, and it must be reliably grounded. If not using a UPS power supply, the AC power supply must be grounded in common. Mark the two ends of the line for easy inspection and management.
Analysis method: According to the failure phenomenon, such as synchronization, check the synchronization interface and transmission cable of the device, and compare the synchronization frequency range of the signal source and the display terminal. Through analysis, the inspection time is shortened, and the image is ghosted to see if the transmission cable is too long and too thin. The solution is to change the line or add a signal amplifier and other equipment. If the focus is not good, you can adjust the display terminal and so on.
One is the second method: it refers to the whole that has a fault, which can be inspected in sections. As long as there is a problem in a certain section, and then check it out to eliminate it, the problem is solved, you can save the time of inspection of other parts.
In summary, do not lightly say that the unclear image is the problem of the matrix switcher or other equipment.