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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10459220 B1

PDFFull Text
Date of Patent:
Oct. 29, 2019

Filed:

Nov. 30, 2017

Systems, devices, and methods for laser eye tracking in wearable heads-up displays

Applicant:

North Inc., Kitchener, CA;

Inventors:

Idris S. Aleem, Pickering, CA;

Mayank Bhargava, Waterloo, CA;

Assignee:

North Inc., Kitchener, ON, CA;

Attorney:

Thomas Mahon

Primary Examiner:

Dismery Mercedes

Int. Cl.
CPC ...
G02B 27/01 (2006.01); G06F 3/01 (2006.01); H04N 9/31 (2006.01); H04N 13/383 (2018.01); G02B 27/00 (2006.01); G02B 5/32 (2006.01); G06F 3/03 (2006.01); G02B 26/10 (2006.01); G02B 26/08 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0093 (2013.01); G02B 5/32 (2013.01); G02B 26/101 (2013.01); G02B 27/01 (2013.01); G02B 27/0103 (2013.01); G02B 27/0172 (2013.01); G02B 27/0176 (2013.01); G06F 3/013 (2013.01); G06F 3/0304 (2013.01); H04N 9/3102 (2013.01); H04N 9/3129 (2013.01); H04N 9/3161 (2013.01); H04N 9/3194 (2013.01); H04N 13/383 (2018.05); G02B 26/0833 (2013.01); G02B 2027/015 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0178 (2013.01);
Abstract

Systems, devices, and methods that use elements of a scanning laser projector ('SLP') to determine the gaze direction of a user of a wearable heads-up display ('WHUD') are described. An infrared laser diode is added to an RGB SLP and an infrared photodetector is aligned to detect reflections of the infrared light from the eye. A scan mirror in the SLP sweeps through a range of orientations and the intensities of reflections of the infrared light are monitored by a processor to determine when a spectral reflection or “glint” is produced. The processor determines the orientation of the scan mirror that produced the glint and maps the scan mirror orientation to a region in the field of view of the eye of the user, such as a region in visible display content projected by the WHUD, to determine the gaze direction of the user.

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