OnlineScreenTesterPro
Panel Uniformity

Backlight Bleed & Uniformity Test

A pitch-black test environment designed specifically for darkened rooms. Inspect all four corners and bezel frame boundaries for light leakage and uneven illumination.

Display Active

Pitch Black Corner Scanner

Turn off your ambient room lights and enter fullscreen. Corners and edges feature subtle guide crosshairs to help pinpoint bezel pressure leaks.

💡Softbox Light
Click to Enter Distraction-Free Fullscreen
Auto-hides in 3s · Tap to cycle colors
Canvas:#FFFFFF
Mode:Solid Color

Testing Instructions:

  1. Turn off all room lights so your testing environment is dark.
  2. Set your monitor brightness to 100%.
  3. Press F to enter full-screen mode.
  4. Look around the perimeter of the panel where the glass meets the bezel. If intense yellow/white patches intrude inwards, take a photo from at least 1.5 meters away to document a warranty claim.