Foveated image display with high resolution in the eye region
Render only where the eye is actually looking, cheaper everywhere else — the core trick behind every modern foveated-rendering VR headset, patent-free since 2017.
US6252989B1 · — · Expired December 2017
US6252989B1 describes rendering a display at high resolution only in the region the eye is tracked as looking at, with resolution falling off toward the periphery — foveated rendering, the technique that lets VR headsets spend their GPU budget where a wearer's gaze actually resolves detail instead of across the whole frame.
It expired in December 2017 — right as eye-tracked VR headsets were becoming a commercially serious idea rather than a lab demo. The core technique underlying a feature now marketed on high-end headsets has been free for the taking since before most of those headsets shipped.
Frequently asked questions
Are these game-mechanic patents part of the trading corpus?
No. The gaming wing sits outside the 13,862-patent trading corpus the rest of the site is built on. These facts are tracked by hand from public patent and news sources, not pulled from our database.
Does a patent on a game mechanic stop others from making similar games?
A patent covers the specific system its claims describe, not a whole genre. Mechanics that predate the patent or differ from the claims may be fine; whether a specific design infringes is a fact-specific legal question. This isn't legal advice.
Can I use the expired ones freely?
Once a patent's term ends or it lapses, the claimed mechanic generally becomes free to implement without a license. Other rights may still apply to a specific game, and this is general information only.