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

Claim 10:
11. A method for a gaze detection assembly, the method comprising:
during a reference frame, controlling a plurality of IR light emitters to emit IR light toward a user eye with a reference intensity distribution;
during the reference frame, capturing a first IR image of the user eye via an IR camera, 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, controlling 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, capturing a second IR image of the user eye via the IR camera, 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, controlling 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 a controller of the gaze detection assembly outputting a gaze direction estimate of the user eye differing from a preceding gaze direction estimate by more than a difference threshold.