Clean and warm up
Remove fingerprints and let the display reach its normal operating state.
Screen Bleeding Test
Check a laptop, monitor or TV for bright edges and uneven dark areas. Cycle through black, near-black and solid colours in full screen, then record where you notice a patch.
Seven solid test coloursKeyboard and touch controlsPrivate observation noteNo camera or upload
A CALM, GUIDED CHECK
Give the whole display one uninterrupted colour.
Begin with black in a dim room, then compare near-black and dark gray. White, red, green and blue can also reveal colour or pixel irregularities.
The test starts with a black screen
Dim the room and clean the display before you begin.
OPTIONAL TEST NOTE
Record what you can see
Tap the areas where a bright patch or edge glow remains visible on black. This note is for comparison—not a diagnosis.
No photo or screen data leaves your device.0 areas marked
Your observation
None · No areas marked
DIRECT ANSWER
How do I test a screen for backlight bleeding?
Clean the display, dim the room and show a full-screen black image. Look around the edges and corners for pale patches that remain in the same place. Test first at your normal brightness, then repeat at a higher setting. Compare what you see from a straight viewing angle; a photo can exaggerate the effect.
BEFORE YOU START
Prepare the room before judging the panel
Use your normal setup
Start at the brightness and viewing distance you actually use, then repeat brighter for comparison.
Face the screen directly
Move your head slightly. A glow that shifts with viewing angle may be IPS glow rather than edge leakage.
Check more than black
Near-black helps reveal subtle patches; solid red, green and blue are useful when checking pixels and colour uniformity.
COMPARE THE SIGNS
Tell common screen effects apart
One black-screen check cannot identify every display problem. Use position, colour and viewing angle as clues.
Backlight bleed
Pale light near an edge or cornerOften stays in the same position when you move your head.
IPS glow
Silvery or warm glow on many IPS panelsUsually changes with viewing angle, distance and room light.
Clouding
Larger uneven gray patches on dark scenesMay look soft or blotchy away from the edge.
Dead or stuck pixel
A tiny fixed dotCheck red, green, blue, white and black screens to compare it.
A SAFE NEXT STEP
Use the result as an observation, not a repair diagnosis
A faint amount visible only in a dark room may not disturb normal use. If a fixed bright patch is obvious in regular films, games or work, document it under consistent conditions and check the seller or manufacturer's return and warranty terms. Avoid pressing, twisting or opening the panel. In Bangladesh, the official consumer-rights links below explain where eligible complaints can be raised.
PUBLIC REFERENCES
Browser and Bangladesh consumer references
The test uses the browser's full-screen feature. If a purchase issue needs escalation, use official consumer channels rather than third-party advice.
Reviewed 29 July 2026- MDN Web DocsFullscreen API GuideOpen browser documentation for entering and leaving the distraction-free full-screen test.
- Bangladesh Consumer Rights DirectorateConsumer Complaints Hotline (16121)Official information for consumers in Bangladesh who need to ask about a complaint process.
- Bangladesh Consumer Rights DirectorateOnline complaint systemThe official online system for eligible consumer complaints in Bangladesh.
COMMON QUESTIONS
Screen bleeding test: common questions
Practical answers about checking a display, IPS glow, severity, fixes, OLED and photos.
How do I check a new monitor or laptop for backlight bleed?
In a dim room, clean the display, open the black test in full screen and inspect the edges from your normal straight-on position. Repeat at normal and higher brightness, then check an ordinary dark scene.
What does backlight bleeding look like?
It often appears as a pale or yellowish patch near an edge or corner on a dark screen. It tends to remain in the same physical area.
What is the difference between IPS glow and backlight bleed?
IPS glow usually changes as you move your head, alter distance or change room lighting. Backlight bleed is more fixed near an edge or corner. The two can appear together.
Is some backlight bleed normal?
Small uneven areas can be visible on some backlit LCD panels, especially in a dark room. Judge whether the patch is distracting during normal use and compare it with the seller's stated policy.
Can backlight bleed be fixed?
A web test cannot fix hardware. Avoid pressing or opening the panel. If the effect is distracting, use the return or warranty process and let an authorised technician assess it.
Does backlight bleed get worse over time?
It may stay similar, but pressure, panel movement or another fault can change what you see. Save a consistent test note or photo and compare later if you are concerned.
Do OLED screens have backlight bleed?
OLED pixels emit their own light and do not use a conventional LCD backlight, so classic backlight bleed does not apply. OLED screens can have other uniformity, banding, retention or pixel issues.
Why does backlight bleed look stronger in a phone photo?
Camera exposure, night mode, angle and automatic processing can brighten dark areas. Use your eyes during normal viewing as the main check and keep camera settings consistent if documenting a change.