US 12,474,773 B2
Eye movement determination
Daniel Najer, Eindhoven (NL); Jens Geiger, Eindhoven (NL); Ferran Suarez, Eindhoven (NL); Laurent Nevou, Eindhoven (NL); and Svenja Mauthe, Eindhoven (NL)
Assigned to ams International AG, Jona (CH)
Appl. No. 18/562,445
Filed by ams International AG, Jona (CH)
PCT Filed May 3, 2022, PCT No. PCT/EP2022/061864
§ 371(c)(1), (2) Date Nov. 20, 2023,
PCT Pub. No. WO2022/243027, PCT Pub. Date Nov. 24, 2022.
Claims priority of application No. 2107238 (GB), filed on May 20, 2021.
Prior Publication US 2024/0310906 A1, Sep. 19, 2024
Int. Cl. G06F 3/01 (2006.01); G02B 27/00 (2006.01); G02B 27/01 (2006.01)
CPC G06F 3/013 (2013.01) [G02B 27/0093 (2013.01); G02B 27/017 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for operating a display of a virtual reality (VR) or augmented reality (AR) headset, the method comprising:
determining a direction of movement of a user's eye;
estimating a future gaze direction from the determined direction of movement; and
rendering an image on the display comprising higher resolution image data in a region comprising the estimated gaze direction and lower resolution image data outside of the region comprising the estimated gaze direction, wherein determining a direction of movement of the user's eye comprises:
illuminating the user's eye with a first pair of lasers, wherein the first pair of lasers comprises a first laser and a second laser,
wherein the first laser is configured to emit light in a first direction, and wherein the second laser is configured to emit light in a second direction, wherein the second direction is nonparallel to the first direction;
illuminating the user's eye with a second pair of lasers, wherein the second pair of lasers comprises a third laser and a fourth laser,
wherein the third laser is configured to emit light in a direction parallel to the first direction and wherein the fourth laser is configured to emit light in a direction parallel to the second direction;
receiving, at the first laser, light redirected from the user's eye, such that self- mixing interference occurs within a laser cavity between light generated by the first laser and the light redirected from the user's eye;
measuring the self-mixing interference; and
determining a direction of movement of the user's eye from the measured self-mixing interference.