US 12,147,596 B1
Event sensing and tracking
Qing Chao, Redmond, WA (US); Robert Dale Cavin, Bellevue, WA (US); Guillaume Lestoquoy, Mountain View, CA (US); Mohammadhossein Daraeihajitooei, Seattle, WA (US); Xinqiao Liu, Medina, WA (US); Raffaele Capoccia, Zürich (CH); Sascha Hallstein, Saratoga, CA (US); and Ziyun Li, Bellevue, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Aug. 26, 2022, as Appl. No. 17/896,679.
Int. Cl. G06F 3/01 (2006.01); G06T 7/73 (2017.01); G06V 10/25 (2022.01); G06V 10/60 (2022.01); G06V 40/18 (2022.01); H04N 5/33 (2023.01)
CPC G06F 3/013 (2013.01) [G06T 7/73 (2017.01); G06V 10/25 (2022.01); G06V 10/60 (2022.01); G06V 40/193 (2022.01); H04N 5/33 (2013.01); G06T 2207/10048 (2013.01); G06T 2207/30201 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A head mounted device comprising:
a near-infrared illuminator module configured to illuminate an eyebox region with a fringe illumination pattern;
an event sensor configured to generate event-signals, wherein the event-signals are generated from an imaging signal being above a positive event-threshold value or below a negative event-threshold value; and
processing logic configured to:
initiate event tracking in response to eye motion in the eyebox region reaching a threshold, wherein the eye motion is determined from the event-signals;
extract eye-features from event-tracking data generated by the event sensors; and
generate a predicted gaze vector from the eye-features.