Screen Uniformity Test
Compare brightness and color consistency across the center, edges, and corners using neutral and solid full-screen references.
Uniform fields highlight dirty-screen effect, tint shifts, darker edges, bright patches, and region-specific color variation. View straight on at native resolution, keep brightness stable, and inspect gray, white, and primary colors from a normal distance.
What does this test measure?
Uniform fields highlight dirty-screen effect, tint shifts, darker edges, bright patches, and region-specific color variation.
Why is this test important?
Compare brightness and color consistency across the center, edges, and corners using neutral and solid full-screen references.
How do you run the test?
View straight on at native resolution, keep brightness stable, and inspect gray, white, and primary colors from a normal distance.
How should results be interpreted?
Subtle variation can be normal; strong stationary bands, patches, or tint changes may affect games, video, design, and office work.
Normal and problematic results
Subtle variation can be normal; strong stationary bands, patches, or tint changes may affect games, video, design, and office work.
Technical limitations
Human vision, viewing angle, ambient light, panel technology, and local dimming influence the result.
Why can the score decrease?
Unstable measurements, denied permissions, unsupported browser APIs, background load, power saving, or an incomplete test can affect the result. When a score changes, the result screen explains the reason.
What should you do if a problem is found?
Reset picture modes, disable unusual dynamic processing, allow panel warm-up, and compare another signal source before service.
Example Result Explanation
Frequently Asked Questions
What does a uniformity test show?
It fills the screen with an even grey so you can see whether brightness and tint are consistent across the panel. Grey reveals unevenness that both pure white and pure black tend to hide.
The edges look darker than the centre. Is that a fault?
Some falloff towards the corners is normal and is partly your viewing angle rather than the panel, since you see the edges of a large screen at a slant. Judge from a distance where the whole screen sits in your field of view.
Why does a tint appear only in one corner?
A localised colour shift usually comes from the backlight or from pressure during assembly. Note where it is and compare against solid red, green and blue, which show whether one primary is responsible.