Systems, devices, and methods for laser eye tracking in wearable heads-up displays
US10409057B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2017 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Dec 12, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems, devices, and methods that use elements of a scanning laser projector (“SLP”) to determine the gaze direction of a user of a wearable heads-up display (“WHUD”) are described. An infrared laser diode is added to an RGB SLP and an infrared photodetector is aligned to detect reflections of the infrared light from the eye. A scan mirror in the SLP sweeps through a range of orientations and the intensities of reflections of the infrared light are monitored by a processor to determine when a spectral reflection or “glint” is produced. The processor determines the orientation of the scan mirror that produced the glint and maps the scan mirror orientation to a region in the field of view of the eye of the user, such as a region in visible display content projected by the WHUD, to determine the gaze direction of the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.