Gaze-tracking system and aperture device
US10725292B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 2018 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Apr 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0138
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A gaze-tracking system for use in a head-mounted display apparatus and an aperture device. The gaze-tracking system includes a first light source and a second light source operable to emit light of first and second type respectively; an image sensor operable to capture an image of the user's eye and reflections of the light of first type from the user's eye; a primary lens; an aperture device positioned between the image sensor and the primary lens, and a processor configured to control the first and second light sources and image sensor, and to process the captured image to detect a gaze direction of the user. The aperture device provides a first aperture to the light of first type and a second aperture to the light of second type, the first aperture and the second aperture being substantially concentric, the first aperture being smaller than the second aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.