Screen Uniformity Test
A guided panel-uniformity test with white, black, gray, RGB, gradient, and region-comparison patterns.
Related tools
Practical uses for Screen Uniformity Test
- Look for darker edges or center patches.
- Inspect dirty-screen effect during gray fields.
- Compare neutral tint across nine screen regions.
A careful three-step workflow
- 1
Use a stable viewing position and moderate room light.
- 2
Inspect several gray levels before deciding a variation is persistent.
- 3
Use the region grid to describe where a difference appears.
Interpret the result in context
- Camera photos often exaggerate banding and tint.
- Some brightness variation is normal and acceptable thresholds vary by product and use.
- State for Screen Uniformity Test is processed locally and resets from the normal page view.
Inspect brightness and color consistency across the panel
A uniform screen should present a flat field without distracting patches, streaks, corners, or color casts. Real displays are rarely mathematically identical from edge to edge, so the useful question is whether a variation is visible in normal content and normal viewing conditions. This tool supplies consistent full-screen fields and a nine-region guide to help you observe and describe the location of a difference.
Use more than one gray level
Uniformity problems do not always appear at the same brightness. White can reveal edge darkening or broad tint. Black can reveal glow, clouding, or light leakage in a dim room. Low and middle gray fields are useful for dirty-screen effect, vertical bands, and subtle color variation. The RGB stage can show whether an area differs mainly in luminance or in one color component. A gradient helps distinguish a panel-wide transition from a fixed patch.
- Place the screen in its normal position and sit centrally at your normal distance.
- Keep room light moderate for gray and white checks. Use a dimmer room for black, but allow your eyes time to adapt.
- Inspect 5, 10, 25, 50, and 75 percent gray rather than making a decision from one field.
- Use the region grid to note top-left, center, edge, or other consistent locations, then return to a plain field to confirm.
- Check familiar real content afterward. A variation that is visible only in an extreme test may not affect ordinary use.
Dirty-screen effect, tint, and backlight variation
“Dirty-screen effect” describes a patchy or streaked appearance over otherwise even content, often noticed during camera pans. Tint is a color shift, such as a region looking greener or pinker than the rest. Edge variation can be caused by several different display technologies and optical effects. A visual field cannot identify the exact cause, and acceptance limits differ by model, manufacturer, and intended use.
| Observation | How it behaves | Useful confirmation |
|---|---|---|
| Dirty-screen effect | Panel-fixed patch or streak across moving content | Mid-gray fields and a slow real-content pan |
| Backlight bleed | Edge or corner light remains in a similar place | Black field at normal brightness and position |
| IPS glow | Corner brightness changes with angle or distance | Move centrally backward, then slightly side to side |
| Tint | Region looks warmer, cooler, greener, or pinker | Compare gray, white, and RGB while centered |
Avoid common false positives
Viewing an LCD off-axis can create a gradient that moves when your head moves. Automatic brightness, local dimming, energy-saving modes, and ambient-light features may change the picture during the test. Cameras often exaggerate banding and tint. Keep settings stable, judge with your eyes first, and never press or rub the panel in an attempt to change a result.
Write a repeatable nine-region report
Describe the observation before naming a cause: “The upper-left region looks slightly darker than the center at 25% and 50% gray from normal distance.” Record the display mode, physical brightness, HDR state, level, room light, viewing distance, and whether the change moves with your head. Then state whether it is test-only, occasionally visible in real content, or regularly distracting. This small report is more useful to support than a camera-only label such as “bad uniformity.”
For OLED-specific low-light levels, use the OLED Gray Screen Test. For isolated dots, use the Dead Pixel Test. Our guides explain backlight bleed versus IPS glow and OLED gray uniformity, banding, tint, and DSE.
Plan a useful session with Screen Uniformity Test
Screen Uniformity Test works best when you start with one question. Decide what you need to view, compare, create, record, or demonstrate. Keep the first run at the default state. Change one control after you understand the starting result. This approach gives you a clear baseline and a useful reason for every adjustment.
A guided panel-uniformity test with white, black, gray, RGB, gradient, and region-comparison patterns. Use the normal page view to prepare the settings. Enter fullscreen only after you review the exit control. Write down the mode and key values when you need to repeat the result on another device.
Choose controls by outcome
The available modes include white, black, 5 gray, 10 gray, 25 gray, 50 gray, 75 gray, rgb, gradient, region grid. The control set includes fullscreen, auto cycle, keyboard, swipe, wake lock, quick download, reset. Start with the option closest to your task. Avoid changing every value at once. A single change gives you a direct before-and-after comparison and makes a saved result easier to explain.
- Look for darker edges or center patches. Set a clear finish point before you begin.
- Inspect dirty-screen effect during gray fields. Set a clear finish point before you begin.
- Compare neutral tint across nine screen regions. Set a clear finish point before you begin.
Run a repeatable workflow
- Stage 1. Use a stable viewing position and moderate room light. Record the starting environment and state.
- Stage 2. Inspect several gray levels before deciding a variation is persistent. Keep the first comparison short and controlled.
- Stage 3. Use the region grid to describe where a difference appears. Reset the page when the session ends.
For a device comparison, use the same browser family, viewport, room light, physical brightness, and viewing distance where practical. Run the same order on both devices. Change one environmental factor only after the matched pass is complete. Keep this route focused on this use: Look for darker edges or center patches.
Keep a useful record
A useful record names the page, mode, control values, browser, device, viewport, date, and viewing condition. For a visual observation, describe the location and the fields where the effect appears. For a generated asset, record dimensions, format, color values, and the downloaded file name. For a simulation, record the duration, custom text, disclosure, and exit method. The starting reference for this page is white.
- Camera photos often exaggerate banding and tint.
- Some brightness variation is normal and acceptable thresholds vary by product and use.
Avoid common setup errors
- For this use, do not treat a browser view as a hardware measurement or system action: Look for darker edges or center patches.
- Do not change several settings before you record the baseline. Begin with white.
- Do not rely on a phone photograph as the only evidence. Keep this route limit in view: Camera photos often exaggerate banding and tint.
- Do not leave route features active after the task ends. The main controls include fullscreen, auto cycle, keyboard, swipe.
- Do not add private data, credentials, payment details, or confidential text. Keep the second listed use in scope: Inspect dirty-screen effect during gray fields.
Continue with the closest comparison
Open a related route when the first page reveals a new question. Keep the same environment and repeat only the part needed for comparison. The closest listed routes are OLED Gray Screen Test, Gray Screen, Black Screen. Keep this final use in mind: Compare neutral tint across nine screen regions.
- OLED Gray Screen Test. Near-black gray levels for inspecting OLED banding, tint, uniformity, and image retention.
- Gray Screen. A neutral mid-gray display with useful level presets.
- Black Screen. A pure black fullscreen surface for dark-room checks and distraction-free secondary displays.
Recommended guides
Questions about Screen Uniformity Test
What does Screen Uniformity Test do?
A guided panel-uniformity test with white, black, gray, RGB, gradient, and region-comparison patterns. Look for darker edges or center patches. Inspect dirty-screen effect during gray fields.
Who gets the most value from this page?
Use this page when your task matches the listed purpose. Look for darker edges or center patches. Inspect dirty-screen effect during gray fields. Start with a clear goal and stop once the page answers that goal.
Which Screen Uniformity Test setting should you choose first?
Start with white, black, 5 gray, 10 gray, 25 gray, 50 gray, 75 gray, rgb, gradient, region grid. Keep the default state for the first pass. Change one control, review the result, then record the setting before another change.
What should you prepare before fullscreen?
Use native resolution where practical. Record scaling, HDR state, picture mode, room light, and viewing distance before starting the test. Use a stable viewing position and moderate room light. Inspect several gray levels before deciding a variation is persistent.
Does this page change hardware or system settings?
The browser shows controlled patterns or generates local output. The page does not inspect panel electronics, certify calibration, provide medical advice, or decide warranty status. The white mode and Reset affect local page state only.
How should you judge the result?
Repeat the observation at another relevant level. Change one variable at a time. Confirm a pattern result in ordinary work, video, or games before assigning practical weight. Camera photos often exaggerate banding and tint. Some brightness variation is normal and acceptable thresholds vary by product and use.
Does the page upload files or settings?
No tool state is uploaded by ScreenOrbit. Supported local files stay in the current browser tab. Generated files are assembled in browser memory and download to your device. The starting mode is white. The first use is: Look for darker edges or center patches.
Which phones, tablets, and computers support the tool?
Current desktop and mobile browsers support the core page. Fullscreen, Wake Lock, downloads, audio, and local file access depend on browser and operating system support. The visible control set starts with fullscreen. The first use is: Look for darker edges or center patches.
What mistakes reduce the value of the page?
Avoid changing brightness, picture mode, viewing angle, and room light at the same time. Multiple changes make the result hard to reproduce. Keep the goal, settings, environment, and exit plan clear. The first listed use is: Look for darker edges or center patches.
Which ScreenOrbit tool should you open after Screen Uniformity Test?
Continue with OLED Gray Screen Test, Gray Screen, Black Screen. The related links preserve the same task area while giving you another field, pattern, or workflow for comparison.