Eye tracking based on light polarization
US10108261B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Jul 5, 2017 |
| Grant date | Oct 23, 2018 |
| Priority date | — |
| Expiry date | Jul 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/62
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A head mounted display (HMD) comprises an eye tracking system configured to enable eye-tracking using polarization. The eye tracking system includes an illumination source and an eye tracking unit comprising a polarization sensitive optical detector. The one or more illumination sources are configured to illuminate an eye and generate reflections directed towards the optical detector. The eye tracking unit is configured to determine a 3D shape of the eye based on the polarization of the reflections. The determined 3D shape of the eye is used to update a stored model of the eye in response to the one or more model parameter values extracted from the determined depth map of the corneal surface. The eye tracking system determines eye tracking information based on the updated model in order to improve eye tracking performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.