All-around check
A complete pass through the basics.
YOUR DISPLAY, UNDER A CLOSER LOOK
Screen bleed test for LCDs.
Black and near-black patterns for a considered look at light around your LCD’s edges.
↗ No installation◉ Visual inspection⌂ Stays on your device
Black
RGB 0, 0, 0YOUR TEST PATTERN
Start with black.
Select a color, then give it the whole screen.
← → Switch colorsEsc ExitF Fullscreen
Tap the pattern to show controls. No automatic cycling or flashing.
◎ You inspect the physical screen. Nothing is scanned or uploaded.Go at your own pace ↗
YOUR EYES. YOUR NOTES.
Keep a little record.
Save what you noticed, so you can compare later. One record per test, stored only in this browser.
⌂ Local to this deviceNo automatic result. Choose only what you actually observed.
A MORE FOCUSED LOOK
Something specific on your mind?
Choose a check for what you’re seeing.
Gray screen uniformity
Compare gray screen shades for bands, tint, and uneven areas.
Dead pixel test
Fixed dark, bright, or colored points.
Screen burn-in
Lingering logos, shapes, or uneven tones.
OLED screen test
Compare gray and color fields on OLED or AMOLED screens.
LCD screen test
Compare familiar colors and gray levels on an LCD.
TAKE A MINUTE. TAKE A CLOSER LOOK.
How to observe LCD edge light and glow
You do the observing.
We provide the patterns.
- 01
Use your usual brightness in a dim room. Avoid judging the panel only at maximum brightness.
- 02
Display black, then near-black. Observe edge light from your normal seated position.
- 03
Change your viewing angle and distance. IPS glow often changes as you move; compare any fixed bright areas.
- 04
Check dark content in normal use. Record brightness, room light, and viewing angle.
BEFORE YOU DRAW A CONCLUSION
Your screen check questions
How can I compare IPS glow with light leakage?
Watch what changes when you move your head or alter your viewing distance. Angle-sensitive brightening is a useful clue for IPS glow. Repeat from your normal centered position; this is not a definitive way to identify a component fault.
Why does a photo look brighter than my screen?
A camera can change exposure and processing in dark scenes. Compare the physical screen in normal use and record the viewing conditions. A photo can provide context, but it is not a brightness measurement.
Is this the right check for OLED?
OLED does not have the conventional LCD backlight this check is intended to examine. If an OLED shows a lingering shape or uneven area, use the OLED color and gray check and seek model-specific support if it persists.
How do I test screen bleeding?
Show black and near-black fields, then compare from your normal viewing position and a slightly different angle. A visual screen-bleed test cannot diagnose the panel or decide warranty coverage.
Can I use a backlight bleed test on a phone or laptop?
It applies to LCD panels, including some phones and laptops. Check the device specifications first: OLED pixels emit their own light and do not have a conventional LCD backlight.
Do I need a 4K backlight bleed video or test image?
No. A solid black or near-black browser field is enough for this visual check; 4K video resolution does not measure light leakage, and a video player can alter the image or leave controls visible.
MAKE SENSE OF WHAT YOU SEE
Put your observation in context.
Compare the clues, then return to the tool to repeat your check.
Instructions source-checked · BenQ: viewing angle and IPS glow. Manufacturer guidance explains the concepts; it does not certify this tool or your panel.
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