	US 12,073,018 B2
	Multiple gaze dependent illumination sources for retinal eye tracking
Eran Tal, Petach Tivka (IL); and Ariel Lipson, Tel Aviv (IL)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 18/026,881
Filed by APPLE INC., Cupertino, CA (US)
PCT Filed Sep. 10, 2021, PCT No. PCT/US2021/049783 § 371(c)(1), (2) Date Mar. 17, 2023, PCT Pub. No. WO2022/066431, PCT Pub. Date Mar. 31, 2022.
Claims priority of provisional application 63/081,545, filed on Sep. 22, 2020.
Prior Publication US 2023/0333640 A1, Oct. 19, 2023
Int. Cl. G06F 3/01 (2006.01); G02B 27/01 (2006.01); G06F 21/32 (2013.01)

CPC G06F 3/013 (2013.01) [G02B 27/01 (2013.01); G02B 27/017 (2013.01); G06F 3/012 (2013.01); G06F 21/32 (2013.01); G06T 2207/30041 (2013.01)]

19 Claims

1. A method comprising:

at an electronic device having a processor and a plurality of light sources configured to direct light at a retina:

selecting a subset of the light sources, the subset of the light sources comprising less than all of the light sources, wherein each of the light sources directs light towards a respective region on the retina, at least some of the regions at least partially different from one another;

illuminating the subset of the light sources to direct light toward one or more portions of the retina;

receiving sensor data at a sensor, the sensor data corresponding to the light reflected from the retina; and

determining an eye characteristic based on the sensor data.