Patent ID: 11972042
Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A gaze detection assembly, comprising:
a plurality of infrared (IR) light emitters configured to emit IR light toward a user eye;
an IR camera configured to sequentially capture IR images of the user eye; and
a controller configured to:
during a reference frame, control the plurality of IR light emitters to emit IR light toward the user eye with a reference intensity distribution;
during the reference frame, capture a first IR image of the user eye, the first IR image depicting a first glint distribution on the user eye;
based at least in part on the first glint distribution, during a subsequent frame, control the plurality of IR light emitters to emit IR light toward the user eye with a subsequent intensity distribution, different than the reference intensity distribution;
during the subsequent frame, capture a second IR image of the user eye, the second IR image depicting a second glint distribution on the user eye; and
on a recheck frame occurring one or more frames after the subsequent frame, control the plurality of IR light emitters to emit IR light toward the user eye with the reference intensity distribution, wherein the recheck frame is triggered responsive to the controller outputting a gaze direction estimate of the user eve having an associated confidence parameter below a predetermined confidence threshold.