01
Prepare a dim-room OLED check
Use your normal SDR picture mode and turn off automatic brightness and night-light filters. Let the display settle and sit at your usual viewing distance.
ToolsFree browser-based screen test
5% Gray Test for OLED Vertical Banding
Display a true RGB 13 gray field, compare 1%, 2%, 5%, and 10% signal levels, and inspect OLED vertical banding in fullscreen.
Panel testsTest workspace
Use every mode and inspect the entire panel, including corners and edges.
Test pattern
Fullscreen controls hide automatically. Move the pointer or tap to bring them back; Escape exits.
Gray presets
Percentages describe the 0–255 RGB signal, not screen brightness or measured light output. These SDR patterns depend on browser color management and display settings.
F toggles fullscreen. Arrow keys switch modes. Escape exits.
How to use this test
How to run a 5 percent gray screen test on an OLED TV
02
Compare 5% gray with nearby levels
Start at 5% (RGB 13), enter fullscreen, and let the controls disappear. Compare 2% and 10% to see whether stripes remain in the same position.
03
Verify with dark scenes
Look for the same uneven areas in a familiar dark film scene. Record picture mode, screen brightness, and the gray signal so you can repeat the check.
What the result can tell you
Reading OLED vertical banding on a 5% gray screen
Fixed darker columns or patches can indicate uneven near-black output. Faint marks seen only in a dark test deserve comparison with ordinary content; the tool does not assign a warranty pass or fail.
Testing notes
5% is rounded from the encoded RGB signal to 13/255. It is not 5% of the panel’s maximum luminance.
Camera exposure and reflections can exaggerate or hide unevenness. Judge the screen with your eyes first.
Use the manufacturer’s built-in picture test if a stripe also appears in everyday viewing.
5% OLED gray test questions
Is 5% gray the same as setting brightness to 5%?
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No. This tool changes the image’s RGB signal. Your TV or monitor brightness setting separately controls how the panel displays that signal.
Does a vertical stripe prove OLED burn-in?
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No. Near-black unevenness, image retention, and other display issues can look similar. Compare multiple gray levels and color fields before drawing a conclusion.