For a useful comparison, keep the room lighting and your viewing position consistent. Give your eyes a moment to adjust to each pattern, and note the areas that stand out so you can check them again under the same conditions.
How to use Screen Uniformity Test
- Select Start Test to open the patterns.
- Under Pattern mode, choose White, Black, or one of the gray patterns: 5% digital gray, 10% digital gray, 20% digital gray, 50% digital gray, 80% digital gray, or 100% digital gray. Use Gray level to select 0%, 5%, 10%, 20%, 50%, 80%, or 100%.
- Look across broad parts of the display for areas that seem brighter, darker, or tinted. Compare more than one pattern rather than relying on a single view.
- Select Previous or Next to move between patterns. You can also press Left or Right. Press Space for automatic mode; with reduced motion, progression stays manual.
- Select Fullscreen or press F to fill the display with the pattern. Press Escape to exit, or use Exit fullscreen when it is shown. In fullscreen, tap the left or right half of the screen to move between patterns. Press R to reset.
Stop if bright patterns cause discomfort.
When to use it
- Before a new monitor’s return window ends: Check whether any areas look noticeably different while you can still decide whether to keep the display.
- Before buying a used screen: View several patterns to judge its appearance in person, not just from a seller’s description.
- After changing picture settings: Compare the same patterns before and after an adjustment to see whether the screen’s appearance changes.
- On a laptop display: Look at the built-in screen from your usual working position and check whether broad areas have a visible tint.
- On a TV or large monitor: Inspect the screen from your ordinary viewing distance to see whether an uneven area is noticeable in your setup.
- After moving or repositioning a display: Recheck it from the new angle and location, where reflections or viewing angle may affect how it looks.
- For a quick visual check: Step through a few patterns when you want to compare the panel without specialized equipment.
Tips for a useful check
Use comfortable ambient light and look from a normal viewing position. Clean the screen safely beforehand, and watch for reflections: glare, dust, and the angle you view from can change what appears on the panel.
Check different gray levels as well as white and black. A variation that is hard to see in one pattern may stand out in another. For a fair comparison between settings, keep the room lighting and viewing position the same, and remember which pattern and area you want to revisit.
Limits of the Screen Uniformity Test
This is a visual check, not a calibrated reading of brightness or color, and it cannot repair a display. The gray percentages are requested digital channel values; they are not percentages of physical luminance. Reflections and viewing angle can also resemble unevenness, so a patch you notice here is not by itself proof of a hardware fault.
If an area remains distracting during ordinary use, check it again in your usual setup and contact the seller or manufacturer if needed. For a broader look at display checks, try the Monitor Test. Use measurement equipment when you need measured brightness or color accuracy.