US 11,972,042 B2
Variable intensity distributions for gaze detection assembly
Benjamin Eliot Lundell, Seattle, WA (US); David C Rohn, Fort Collins, CO (US); Curtis Alan Tesdahl, Fort Collins, CO (US); Marko Bezulj, Belgrade (RS); Christopher Charles Aholt, Newcastle, WA (US); and Navid Poulad, San Jose, CA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Jun. 15, 2021, as Appl. No. 17/348,551.
Prior Publication US 2022/0397956 A1, Dec. 15, 2022
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 27/0172 (2013.01); G02B 2027/0187 (2013.01)] 15 Claims
OG exemplary drawing
 
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.