The Screen-Door Effect: Why You See a Grid

The screen-door effect (SDE) is a visible grid of fine lines between pixels — like looking through a screen door.

What causes it

Every pixel has a tiny non-illuminated gap around it. When pixels are large relative to your viewing distance, those gaps become visible as a mesh. It's about fill factor and pixel density, not a defect.

Where you'll see it

• VR headsets — lenses magnify pixels right against your eye (early headsets were notorious).
• Large TVs viewed too close.
• Low-PPI panels at short distances.

How it's reduced

• Higher resolution / pixel density — smaller gaps.
• Higher fill factor panels and diffusion layers.
• Pentile vs RGB-stripe sub-pixel layouts change how SDE appears.

Check your own panel

View a full White Screen up close. A faint, even grid is normal SDE; irregular lines or bands are a different issue — for those, check uniformity with the Brightness Uniformity Test. Increasing viewing distance is the simplest fix.