US 12,487,672 B2
Eye tracking system with in-plane illumination
Qi Zhang, Kirkland, WA (US); Chad Lichtenhan, Tucson, AZ (US); Morteza Karami, Renton, WA (US); Kuan Pei Yap, San Jose, CA (US); and Mehmet Mutlu, Redmond, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Jun. 10, 2024, as Appl. No. 18/738,738.
Application 18/738,738 is a continuation of application No. 18/342,277, filed on Jun. 27, 2023, granted, now 12,045,387.
Claims priority of provisional application 63/407,587, filed on Sep. 16, 2022.
Prior Publication US 2024/0329736 A1, Oct. 3, 2024
Int. Cl. G06F 3/01 (2006.01); G06V 40/18 (2022.01)
CPC G06F 3/013 (2013.01) [G06V 40/18 (2022.01)] 20 Claims
OG exemplary drawing
 
1. An eye tracking system to be used in a near-eye display device, comprising:
at least one illuminator to generate light beams including glints on a surface of an eye;
an eye tracking camera to capture an image of the eye with the glints;
a waveguide display to project computer-generated content to the eye;
a mirror placed between the at least one illuminator and the waveguide display to reflect light of the light beams generated from the at least one illuminator toward the waveguide display, wherein the mirror is positioned to control a direction of the reflected light of the light beams to bypass the eye; and
a processor to receive the captured image of the eye with the glints from the eye tracking camera, determine a gaze direction of the eye based on the captured image of the eye with the glints, and generate the computer-generated content for the waveguide display to project to the eye based on the gaze direction of the eye.