What to do
Open the black pattern fullscreen. Inspect the edges in a dim room with the display at your usual brightness.
Backlight Bleed Test
Inspect black-screen backlight bleed, IPS glow, corner leakage, and panel edge brightness.
In fullscreen, press Esc or tap the test area to exit.
Local history
Save a result to keep it in this browser. History holds your five most recent saved results for this test.
No saved results yet.
How to use this test
What to look for
Check from your normal viewing position and then from another angle. A bright patch that changes with angle can look different from one that stays fixed.
Patterns provide visual references for your own inspection. Refresh estimates come from animation callbacks, not direct panel telemetry. Lighting, display processing, viewing angle, and browser behavior affect results.