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Pure Black Screen

True OLED black screen. Verify absolute zero-light pixel shutoff on OLED/AMOLED panels, inspect IPS glow and backlight bleeding around edges in dark rooms.

Click to enter True Black Fullscreen Mode

IPS Glow vs. Backlight Bleed Guide

Backlight Bleed:

Light physically escaping around bezel edges due to improper clamping pressure or defective seal. Does not change with viewing angle.

IPS Glow:

Inherent silvery sheen visible on IPS LCD panels when viewed from off-axis angles in dark rooms. Moves and shifts as you change head position.

OLED True Zero Black:

OLED pixels emit their own light and turn off completely, yielding infinite contrast with 0.000 nits and zero light bleed.

Black Screen & Backlight Bleed Guide

How to Use This Tool

  1. Click "Enter Fullscreen Black" to switch your display to 100% pure RGB(0,0,0) black.
  2. Turn off or dim your room lighting to see subtle light leakage clearly.
  3. Examine the outer edges and corners of your screen for uneven bright spots or stuck pixels.
  4. Shift your head from left to right to distinguish between harmless IPS glow and physical backlight bleed.
  5. Press the ESC key or click anywhere on the screen to exit fullscreen mode.

Backlight Bleed vs. IPS Glow: How to Tell

IPS Glow is a natural characteristic of IPS computer monitors. It looks like a soft, silvery sheen in the corners that moves or disappears when you change your viewing angle. Backlight Bleed is a manufacturing flaw where light escapes around the frame edges; it stays locked in the exact same spot no matter where you move your head.

Why OLED Displays Look Completely Pitch Black

Traditional LCD monitors use a continuous LED backlight behind the screen that shines through liquid crystals. OLED and QD-OLED monitors, however, turn off individual pixels completely when displaying black, emitting zero light (0.000 nits) for true infinite contrast.

Great for Spotting Dust & Smudges

Displaying a solid black screen makes surface dust particles, keyboard marks, and dried fingerprint smudges stand out clearly. To clean your display safely, use a clean microfiber cloth slightly dampened with distilled water—never use harsh household window cleaners containing ammonia or alcohol.