Why test with a red screen?
Red isolates one RGB channel, making certain stuck or dead pixels easier to see than on mixed content.
A uniform red screen isolates the red color channel so you can spot dead pixels, stuck subpixels, and panel uniformity issues.
Alterna branco, preto, vermelho, verde e azul a cada 5 s. Melhor em ecrã inteiro. Todos os testes de ecrã →
Predefinição de resolução
Verify the red channel renders evenly from edge to edge on LCD and OLED panels.
Pixels stuck on green or blue may appear as contrasting dots against pure red.
Red provides dramatic ambient light for photography, streaming, or creative setups.
Cycling red, green, and blue fullscreen colors is a standard quick test for subpixel defects without specialized software.
Perceived red brightness depends on gamma and color temperature — compare results with white and black for context.
Abrir fundo white em ecrã completo
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Abrir fundo green em ecrã completo
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Abrir fundo grey em ecrã completo
Red isolates one RGB channel, making certain stuck or dead pixels easier to see than on mixed content.
Yes. Cycle red, green, blue, white, and black for a thorough channel and contrast check.
Use the download controls to export PNG at your chosen resolution.
Lower brightness for extended use and take regular breaks like any bright display.