Black panel
Black is useful for seeing glow, bleed, clouding, and zones that appear brighter than the rest of the screen.
Grey panels
Low, middle, and high grey panels make everyday uniformity problems easier to spot than busy photos or video.
Gradients
Horizontal and vertical gradients reveal banding, abrupt tone jumps, and top-to-bottom brightness variation.
Uniformity is partly visual by design
A browser cannot measure physical luminance uniformity without hardware. Pixy gives you the right panels and combines that inspection with browser capability signals.
Use this checklist while Pixy runs
- Dim the room slightly when checking black panel bleed.
- Use normal viewing distance first, then inspect closer.
- Check grey panels for blotches that would matter in spreadsheets, editing apps, or games.
- Do not overreact to tiny edge glow that is invisible in normal use.
- Save a report if the issue may support a return request.
Questions people ask
What is dirty-screen effect?
Dirty-screen effect is a blotchy or uneven look, often visible on grey or panning scenes.
Can Pixy measure backlight bleed?
Pixy cannot measure luminance. It provides the panels that make visible bleed easier to inspect.
Should I test in a dark room?
A dim room helps reveal bleed, but also check at your normal brightness and normal room lighting.