Screen Uniformity Test - Check Brightness and Color Evenness
Check your screen for uneven brightness, dirty screen effect, yellow tint, color shift and panel uniformity issues using fullscreen colors and grids.
Quick answer
A screen uniformity test checks whether brightness, white balance and gray tone stay consistent across the whole panel.
Method: ScreenTestKit generates the test surface in your browser. Results depend on visual inspection; the site does not read or diagnose physical panel hardware.
How to use this test
- Use white, gray and color screens at normal brightness.
- Look at the center, corners and each side without tilting the display.
- Repeat with a mid-gray screen because dirty screen effect is often easier to see there.
- Compare results with the backlight bleed and gradient tests.
What to watch for
- Yellow, pink, green or blue tint on one side of the screen.
- Dirty screen effect, cloudy gray areas or vertical bands.
- Corners that are noticeably dimmer than the center.
- Uniformity problems that remain visible during normal documents, web pages or video.
How to interpret results
Slight edge variation
Minor variation can be normal. Judge it against normal content, not only test screens.
Strong tint or bands
If it is repeatable and visible in real use, document it for return or warranty review.
Mostly visible on gray
Run the gray screen and OLED burn-in tests to check dirty screen effect or retention.
Frequently asked questions
Why does gray reveal more problems than white?
Mid-gray makes subtle brightness and tint variation easier to notice than very bright white.
Can calibration fix uniformity?
Calibration may improve overall color, but it usually cannot remove physical panel non-uniformity.