The appearance of black shadows at the edge of a computer screen is commonly referred to as "screen dark corners" or "yin-yang screens" and can be caused by various reasons. Here are some possible reasons and corresponding solutions: cause analysis
1. Uneven backlight: If there is a problem with the backlight system in a liquid crystal display (LCD), such as damage to the LED light source or aging of the light guide plate, it may cause dark corners at the edges of the screen.
2. Hardware damage: - The display may be subjected to external pressure, which may cause changes in the arrangement of liquid crystal molecules, resulting in permanent dark areas- If the monitor is used for too long, it may experience aging, leading to a decrease in display performance.
3. Improper settings: - Incorrect screen resolution settings may cause the screen image to stretch or compress, resulting in dark corners at the edges- Setting the refresh rate too low may also cause display issues, making the screen appear with ghosting and even dark corners.
4. Connection cable issue: Poor or damaged connections between the screen and computer (such as HDMI, VGA, DVI, etc.) may also cause display abnormalities.
5. Environmental light impact: Strong refraction or reflection of environmental light may create dark areas on both sides of the screen.
6. Dust and stains: Dust and stains on the screen may cause uneven refraction of light, resulting in dark corners. resolvent
1. Check and adjust settings: - Try adjusting the screen resolution and refresh rate to the recommended values to improve display quality- Check if there are any special effects or filter settings enabled in the monitor menu, and try disabling these settings.
2. Update drivers: Go to the official website of the computer manufacturer or graphics card manufacturer to download and install the latest graphics card drivers to ensure compatibility between the graphics card and the monitor.
3. Check the connection wires: - Ensure that the connection wires of the monitor are not loose, and that the interface is clean and intact. If there is any damage, replace the connecting wire with a new one in a timely manner.
4. Cleaning the screen: Use a specialized cleaning agent to wipe the screen and remove dust, fingerprints, and other stains to reduce the possibility of uneven light refraction.
5. Adjust ambient light: - Try to avoid placing the monitor under strong light, or adjust the brightness and contrast settings of the monitor to improve the display effect.
6. Contact professional maintenance: If none of the above methods can solve the problem, it may be due to a hardware malfunction of the monitor itself. At this point, it is recommended to contact professional computer repair personnel or the manufacturer's customer service for further diagnosis and repair.
Black shadows appearing at the edges of computer screens are a common issue, which may be caused by multiple factors such as hardware, settings, and environment. By carefully checking and adjusting relevant settings, updating drivers, cleaning screens, and other measures, problems can be effectively solved in most cases. If the problem persists, it is recommended to seek the help of professional maintenance personnel.