What Will Cause the LCD display to flash?

by:Genyu     2019-11-26
The reason for the flash screen of the LCD: signal interference problem display 1. Whether the cable connecting the LCD does not have a shielding coil, and if there is no black bump to prevent interference, it will also interfere with the screen. 2, also check whether there is interference nearby, such as high-power audio, power transformer. Liquid crystal displays are easily interfered by strong electric fields or strong magnetic fields. In some cases, screen jitter is caused by magnetic fields or electric fields near liquid crystal displays. 3. In order to eliminate all interference around the LCD, the computer can be moved to an empty table around it, and then the BOOT test can be carried out. If the screen jitter disappears, then it means that there is strong electric field or strong magnetic field interference in the original place of your computer. Please put suspicious things (Such as Speaker subwoofer, magnetized Cup, etc)Take it away from the computer. 4. Turn off the LCD and reopen it several times to achieve the purpose of degaussing ( The current display has automatic degaussing when turned on). The reason for the LCD flash screen: The screen refresh rate problem & hardware problems such as display and graphics card display 1, desktop right click-> Properties-> Settings-> Advanced-> Monitor-> Screen refresh frequency, CRT can be adjusted to 75Hz or more, and LCD screen of notebook computer can be adjusted to 60Hz. 2. In fact, the main reason for the screen jitter of the LCD is that the refresh frequency of the LCD is set below 75Hz. At this time, the screen often shakes and flashes, we only need to increase the refresh rate to more than 75Hz, then the phenomenon of computer screen jitter will not appear again. 3. Sometimes, due to the high age of the liquid crystal display used, jitter will also occur. In order to check whether the electronic components inside the display are aging, the faulty display can be connected to someone else's computer for testing. If the fault still disappears, the display is broken and needs repair. First, the frequency of the LCD display screen itself is too high, resulting in a flash screen. The frequency of the LCD display screen itself is too high, resulting in a flash screen, in general, there are few problems with the flash screen of the device due to the high frequency in real life. People's naked eyes have no flicker feeling for pictures over 60 hz, while the general design standard of LCD display screen is basically maintained on this data, therefore, under normal circumstances, there will be no high frequency, but at the same time, the screen itself cannot be ruled out. After the relevant instruments are measured, it is indeed the fault of the screen itself. In addition to replacing the new monochrome LCD screen, the software related to the equipment is designed. The best way is to increase the OSC frequency of the IC, look at the flicker of the LCD screen. Of course, if the LCD display has separate row and column drivers, the flash screen problem can also be solved by adjusting the settings of the driver chip. Second, it is very common for LCD display screen and light source frequency to cause flash screen caused by LCD display screen and light source frequency. Due to the different frequencies of different light sources, under certain specific circumstances, it is also common for LCD display screens to flash when their frequencies are similar to those of artificial light sources. At this time, the way to do well is an artificial light source or LCD display equipment, avoid the occurrence of a splash screen.
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