08LCD BACKLIGHT / DARK ROOM

Backlight Bleed Test

In a dark room, use a pure-black field to observe light near the corners and edges of an LCD. Sit at your normal position before comparing areas.

Browser-generated pattern · Not a laboratory measurement

PROTOCOL / 01—04

How to use this test

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. Use arrow keys, Space, click or touch to change patterns.
04
Observe from your normal position first, then move closer only to inspect a detail.

OBSERVE

INTERPRET

Backlight bleed tends to stay near edges; IPS glow changes with viewing angle. Both differ from local-dimming halos and general black-level limits.

LIMITS

The result depends heavily on brightness, viewing angle, exposure and room darkness. It is not an absolute diagnosis or warranty assessment.

FAQ

01Is IPS glow the same as backlight bleed?

No. IPS glow typically changes with viewing angle, while bleed is more fixed and often appears close to an edge or corner.

02Should I photograph the screen?

A phone’s automatic exposure can greatly exaggerate glow. Judge with your eyes first and lock exposure if you need a comparison photo.