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Screen-door effect
也称为 SDE, screen door effect, pixel grid
The screen-door effect is a visible fine grid of dark lines between pixels in a VR headset, making the image look as if you are viewing it through a mesh screen door.
The screen-door effect, often shortened to SDE, describes the thin dark lines you can sometimes see between pixels in a headset. Because VR lenses magnify a small display so much, the unlit gaps between pixels can become visible as a faint mesh laid over the image, a bit like looking out through a screen door.
What causes it
SDE depends on two things: how much space there is between pixels (the fill factor) and how strongly the lenses magnify the display. Low pixel density, a wide field of view and older panel types all make it more visible.
How it has improved
Early consumer headsets were well known for SDE. Modern headsets with higher resolutions, higher pixels per degree, and panels with less space between subpixels have reduced it a lot. On high-density micro-OLED displays it is very hard to see at all.
Related effects
SDE is different from blur caused by a bad fit or wrong IPD setting, and from the glare streaks of Fresnel lenses. If the whole image looks soft rather than gridded, adjust the fit first.
相关术语
- Pixels per degree (PPD)
- Pixels per degree (PPD) measures how many display pixels fall within one degree of your vision in a headset…
- Micro-OLED
- Micro-OLED is a display built directly on a silicon chip, packing very small self-lit pixels into a tiny panel…
- Fresnel lens
- A Fresnel lens is a thin, light lens made of concentric ridges; it is cheap and bright but can show glare streaks called god rays…