06PANEL CONSISTENCY / FULL FIELD

Screen Uniformity Test

Fill the panel with four neutral gray levels, from near-black to light gray, then compare nine numbered zones so you can describe exactly where any variation appears.

5 patterns
Fullscreen
No install

Browser-generated pattern · Not a laboratory measurement

PATTERNS / 05

Patterns in this test

Each pattern targets a different symptom. Start from the top, or jump straight to the one you need.

01

Very dark gray · 5%

Near-black reveals clouding, vertical bands and tinted patches, especially on VA and OLED panels.
02

Dark gray · 20%

Move your eyes slowly across the screen. Blotches or bands that look like dirt are the dirty-screen effect.
03

Mid gray · 50%

The reference field. Compare the corners with the centre and look for pink, green or blue casts.
04

Light gray · 80%

Bright fields reveal darker corners (vignetting) and colour shifts towards the edges.
05

Nine-zone comparison

Compare each numbered zone with zone 5 in the centre. Note which numbers look darker, brighter or tinted.

PROTOCOL / 01—04

How to use this test

Keyboard and touch

→ · Space · Enter · click: Next pattern
←: Previous pattern
I: Keep the hint panel visible
Esc: Exit fullscreen
Tap or move: Show controls on touch screens and mice

01
Clean the screen gently and let it reach its normal operating temperature.
02
Set browser zoom to 100% and use the brightness and picture mode you normally use.
03
Start fullscreen mode. Each pattern shows a short hint about what to look at.
04
Observe from your normal position first, then move closer only to inspect a detail.

OBSERVE

What to look for

Vertical or horizontal dirty-looking bands
Corners or edges that are darker than the centre
Pink, green or blue tinting in neutral areas

INTERPRET

How to read the result

Minor variation is common, especially at very dark gray. Judge the panel at normal brightness and distance, and focus on whether it distracts in real content such as sports, games or video calls.

LIMITS

Limits of a browser test

Viewing angle, local dimming, warm-up time, room reflections and brightness strongly affect uniformity. Photos often exaggerate or hide the issue.

FAQ

Frequently asked questions

01What is dirty-screen effect?

DSE is visible non-uniformity that can resemble smudges or bands, often most noticeable during camera pans over flat colours.

02How long should the display warm up?

For a careful comparison, use the display normally for roughly 20–30 minutes and keep your usual picture settings.

03What are the numbered zones for?

They give you a shared vocabulary. Instead of “the left looks off”, you can note “zones 1 and 4 are darker than 5”, which is useful for a warranty claim or a comparison after changing settings.

Screen Uniformity Test

Patterns in this test

Very dark gray · 5%

Dark gray · 20%

Mid gray · 50%

Light gray · 80%

Nine-zone comparison

How to use this test

Keyboard and touch

What to look for

How to read the result

Limits of a browser test

Frequently asked questions

Continue checking

OLED burn-in

Backlight bleed & blooming

Black screen