HubPure Black Screen
Overview

Pure Black Screen.

Full-screen pitch black screen (#000000) for testing OLED subpixel shut-off, mini-LED local dimming zones, and IPS light leakage.

DOMAINscreentesttool.com
CATEGORYcolor
KEYBOARDF • Space • Z

Execution steps

  1. 01Launch Fullscreen Pure Black in a dark room.
  2. 02On OLED displays, all screen pixels should completely turn off, producing absolute zero brightness.
  3. 03On LCD/LED screens, observe panel glow and local dimming zone blooming.

Diagnostic symptoms

  • Any faint glow on OLED displays (indicates incorrect black level / RGB full range settings in GPU).
  • Blooming halos around mouse cursor on Mini-LED displays.

Pro tips

  • Use to verify your monitor enters true zero-luminance state.

FAQ

Should an OLED screen emit light on a black screen?

No, OLED pixels emit their own light and completely shut off when displaying #000000 black.

Related diagnostics

Dead Pixel TestLocate dead, stuck, or broken subpixels across full RGB & solid color screens.Stuck Pixel Test & RepairDetect stuck subpixels and unstick them with high-frequency rapid RGB noise sweeping.Backlight Bleed TestInspect LCD edge lighting leakage along screen bezels in true dark room conditions.IPS Glow TestDifferentiate off-axis IPS glow from hardware backlight bleed with angle visualizers.