Pixel density
This page is a stub, please expand it if you have more information.Pixel density is the number of pixels in a fixed distance. It is often measured in pixels per inch or PPI. A display's pixel density is different from its resolution, which is the total number of pixels across the display's width and height.
Pixel density in Virtual Reality
Virtual reality head-mounted displays require high pixel density because the screen is very close to the user's eyes. Higher PPI leads to clearer, sharper images with more details. An HMD with low pixel density can cause blurring of words and objects, presence of pixelation and the screen door effect. PPI is an important parameter when considering HMDs.
As pixel density increases, lower persistence is needed to avoid blurring.
GameWorks VR's multi-res shading is able to render different parts of the image with different resolutions to better match the pixel density of a warped image. Improving performance.
Pixel density of various HMDs
Virtual Reality
Augmented Reality
| Devices | Pixel Density |
|---|---|
| Atheer AiR | |
| CastAR | ?? |
| Google Glass | |
| Impression Pi | 400+ PPI |
| Magic Leap 2 | Over 16.8M colors supported |
| Magic Leap One | |
| Meta 2 | |
| Microsoft HoloLens | Holographic density: over 2.5k radiants (light points per radian) |
| Microsoft HoloLens 2 | |
| R-7 Smartglasses | |
| Rokid Max Pro | |
| SmartEyeglass Developer Edition SED-E1 | ?? |
| Snap Spectacles | |
| Snap Spectacles 2 | |
| Snap Spectacles 3 | |
| Snap Spectacles 4 | |
| Snap Spectacles 5 | 37 PPD |
| Sulon Q | |
| XREAL Air 2 Pro |