Backlight bleed test
Darken the room, set your screen to full brightness, and start the test — it fills the screen with pure black. Look along the edges and corners for fixed bright patches. Click or press Esc to exit.
Backlight bleed FAQ
- What is backlight bleed?
- Edge-lit LCDs shine a backlight through the panel, and where the panel layers don't sit perfectly flush — usually along edges and in corners — light leaks through dark scenes as bright patches. OLED displays light each pixel individually, so they can't bleed at all.
- How do I tell backlight bleed from IPS glow?
- Move your head. IPS glow is a silvery sheen that shifts and fades as your viewing angle changes — it's a property of the panel technology, not a defect. Backlight bleed stays fixed in place no matter where you view from, typically as distinct bright blotches at the edges.
- Is backlight bleed fixable, and how much is normal?
- Mostly it's panel lottery. Almost every edge-lit LCD shows faint bleed at maximum brightness in a dark room — that's normal and invisible in regular use. Bleed you can see in dim evening viewing at normal brightness is worth a warranty conversation; standards vary by manufacturer.