如何检查显示器坏点与色彩均匀度

When this guide is useful

For those who search for "dropout test", "constantly lit LCD/sunspot check", "check color unevenness on display", we will explain how to tell the difference on a single color full screen.

• I want to check whether there are any missing pixels or constant lighting on the monitor immediately after purchase.
• I want to search for pixel abnormalities using single colors of black, white, red, green, and blue.
• I want to check color unevenness, banding, and display position using gradations and grids.

Prepare the confirmation environment

• Remove dust and dirt from the screen surface with a soft cloth
• Set the display to the brightness you normally use
• Hide tabs and scrollbars in full screen browser
• Additional information for this feature.

Basic confirmation procedure

1. Check for pixels that remain brightly lit on a black screen or for light leakage.
2. Additional information for this feature.
3. Display red, green, and blue in order and check for pixels that do not change in a specific color.
4. Check for misalignment, gradation, and band-like unevenness using grids and gradations.

Distinguish between pixel abnormalities and dirt

If the position appears to move when you change the viewing angle, it may be due to dirt on the surface, and if the same point appears in the screenshot, it may be due to the drawing data. Check if it appears in the same position on another input terminal or terminal.

Pressing hard, rubbing, or flashing for a long time may damage the panel. Also check the manufacturer's warranty terms.

Specific example: Check if a small black dot is missing.

Clean the screen with a soft cloth and display white, red, green, and blue on the full screen. Dirt tends to look the same even if you change the color, and pixel abnormalities may look different depending on the specific color.

If the browser's UI and scrollbars remain, you will not be able to see all the way to the edges. Display the screen in full screen and separate the confirmation from a short distance from the screen and the confirmation from a short distance.

1. Clean the screen and set the brightness to the value you usually use.
2. Cycle through black, white, red, green, and blue in full screen mode.
3. Additional information for this feature.
4. Check suspicious locations in different colors and also on the regular screen to distinguish them from dirt or image content.

Pressing the screen too hard may damage the panel. Do not press or rub the abnormal area with your fingers.

Frequently asked questions

What is the difference between black dots and bright dots?

There are pixels that always appear to be off, and pixels that remain lit in a specific color or white. Check the condition with multiple solid color backgrounds.

Can I test on my smartphone?

You can check it if you can display it in full screen. Also consider automatic screen brightness, notch, display magnification, and dirt on the protective film.