US 11,966,048 B1
Head-mounted devices with dual gaze tracking systems
Michael J. Oudenhoven, San Francisco, CA (US); Brian S. Lau, Sacramento, CA (US); and David A. Kalinowski, Davis, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jun. 9, 2021, as Appl. No. 17/343,528.
Claims priority of provisional application 63/050,040, filed on Jul. 9, 2020.
Int. Cl. G02B 27/00 (2006.01); G02B 27/01 (2006.01)
CPC G02B 27/0093 (2013.01) [G02B 27/0172 (2013.01); G02B 27/0176 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/0178 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A head-mounted device, comprising:
a head-mounted support structure;
a first gaze tracking system having light-emitting devices and having light detectors in the head-mounted support structure, wherein the first gaze tracking system is a non-glint-based gaze tracking system; and
a second gaze tracking system having an image sensor in the head-mounted support structure that measures eye glints, wherein the head-mounted device is configured to operate in a first gaze tracking mode and a second gaze tracking mode, the second gaze tracking system is off and the first gaze tracking system, including the light-emitting devices and the light detectors, is on in the first gaze tracking mode, and the second gaze tracking system is on and the first gaze tracking system is on in the second gaze tracking mode.