OLED vs LCD — What Changes Your Screen Tests
OLED pixels emit their own light, so pure black (#000000) can turn pixels off entirely. LCD panels use a backlight behind liquid crystals, so black is filtered light rather than true absence of emission.
That difference changes how you interpret black screen, white screen, and gray tests on Fillhex.
Use this guide to pick the right diagnostics and habits for phones, TVs, laptops, and desktop monitors.
Black screen behavior
OLED often looks deeper in dark rooms on #000000. LCD may show gray lift or corner glow from IPS bleed when you run backlight-bleed-test sequences.
Brightness and power
OLED power drops on dark content; LCD draw depends mainly on backlight level, not image content. See battery-saving-oled for phone habits.
Burn-in and retention
OLED can retain static logos over time; LCD does not burn in the same way but may suffer image persistence on rare cases. Run oled-burn-in-test on OLED after heavy HUD use.
Viewing angles
IPS LCD shifts color off-axis; OLED also shifts but without backlight clouding. Angle affects purple/green glow versus OLED color shift.
Dead pixel appearance
Stuck subpixels look similar on both technologies during RGB tests. Dead pixels stay dark on white regardless of panel type.
Which to buy for your use
OLED excels in contrast for film and creative work; LCD remains common for bright offices and budget fleets. Test either with the same Hub color tools after purchase.