As a terminal display device, LED display screens have attracted much attention in the market. With the maturity of splicing technology, the application fields of LED display screens continue to expand. Currently, it has spanned various industries such as entertainment, government, venues, transportation, energy, finance, broadcasting and television. In our daily work and life, we can often see the figure of LED display.
When the LED display is interfered by the signal, it will have a significant impact on the display of the display. For example, when it is disturbed by static electricity, the large-screen display often has multiple lines of ripple; when there are several lines of equal spacing on the display Vertical bar interference is usually caused by the mismatch of the characteristic impedance of the network cable.
According to many years of experience of Fly LED LTD engineers, the general reasons for interference are as follows:
1. The quality of the video network cable is not good;
2. There are strong sources of interference near the system;
3. Faults caused by short circuit or open circuit of the core wire of the video network cable;
4. The fault caused by the mismatch of the characteristic impedance of the network cable;
5. Space radiation interference introduced by the network cable.
6. Failure caused by the power supply of the power supply system.
Here is a brief analysis of the solutions to the signal interference caused by the above factors
1. The quality of the video cable. The line resistance of this kind of video line is too large, which causes a large attenuation of the signal, which is also the cause of aggravated failure. In addition, the characteristic impedance parameter of this kind of video cable is out of regulation, which is also one of the reasons for the malfunction.
2. The interference source near the system is too strong. The pipe of the video network cable shall be grounded.
3. The core wire of the video network cable is short-circuited or short-circuited. When this kind of malfunction occurs, the LED display is often not caused by the various signals of the entire system, but only on the crystal head. As long as you carefully check these connectors one by one, you can solve it.
4. The fault caused by the characteristic impedance mismatch of the network cable. In this case, it is recommended to buy brand five or six network cables, and compare the quality of the network cables.
5. Space radiation interference introduced by the network cable. The solution to this situation is to understand the surrounding environment when the system is established, and try to avoid or stay away from the radiation source as much as possible. Separate the network cable and the power cable into an independent string of rubber tubes.
6. The power supply problem of the power supply system. There are interference signals superimposed on the normal power supply. In this case, as long as the entire system of the LED display screen is purified power or online UPS power supply, it can basically be solved.
