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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 11846774 B1

PDFFull Text
Date of Patent:
Dec. 19, 2023

Filed:

Mar. 17, 2022

Eye tracking with switchable gratings

Applicant:

Meta Platforms Technologies, Llc, Menlo Park, CA (US);

Inventors:

Sihui He, Sunnyvale, CA (US);

Jacques Gollier, Sammamish, WA (US);

Maxwell Parsons, Seattle, WA (US);

Babak Amirsolaimani, Redmond, WA (US);

Wanli Chi, Sammamish, WA (US);

Daniel Guenther Greif, Redmond, WA (US);

Renate Eva Klementine Landig, Seattle, WA (US);

Xiayu Feng, Kirkland, WA (US);

Zhimin Shi, Bellevue, WA (US);

Nicholas John Diorio, Duvall, WA (US);

Yang Yang, Redmond, WA (US);

Giuseppe Calafiore, Redmond, WA (US);

Fenglin Peng, Redmond, WA (US);

Tanya Malhotra, Redmond, WA (US);

Andrew John Ouderkirk, Redmond, WA (US);

Assignee:

Meta Platforms Technologies, LLC, Menlo Park, CA (US);

Attorneys:

PEQUIGNOT + MYERS;

Matthew A. Pequignot;

Primary Examiner:

Nelson M Rosario

Int. Cl.
CPC ...
G02B 27/00 (2006.01); G02B 27/01 (2006.01); G06F 3/01 (2006.01); G02F 1/29 (2006.01); F21V 8/00 (2006.01); G02B 6/35 (2006.01); G02F 1/1335 (2006.01); G09G 3/00 (2006.01); G09G 3/34 (2006.01); G06T 7/246 (2017.01); H04N 23/56 (2023.01); G02F 1/335 (2006.01); G03H 1/02 (2006.01); G06F 1/16 (2006.01); H04N 23/698 (2023.01); G01B 11/22 (2006.01); G01S 7/4865 (2020.01); G01S 17/10 (2020.01); G02B 27/42 (2006.01); G02F 1/33 (2006.01); G06T 3/40 (2006.01); G02B 27/44 (2006.01); G02B 26/08 (2006.01); H04N 23/10 (2023.01);
U.S. Cl.
CPC ...
G02B 27/0093 (2013.01); G01B 11/22 (2013.01); G01S 7/4865 (2013.01); G01S 17/10 (2013.01); G02B 6/005 (2013.01); G02B 6/0016 (2013.01); G02B 6/0031 (2013.01); G02B 6/0035 (2013.01); G02B 6/0066 (2013.01); G02B 6/3518 (2013.01); G02B 26/0816 (2013.01); G02B 27/0081 (2013.01); G02B 27/0172 (2013.01); G02B 27/0179 (2013.01); G02B 27/4205 (2013.01); G02B 27/44 (2013.01); G02F 1/133504 (2013.01); G02F 1/133526 (2013.01); G02F 1/292 (2013.01); G02F 1/294 (2021.01); G02F 1/33 (2013.01); G02F 1/335 (2013.01); G03H 1/0248 (2013.01); G06F 1/163 (2013.01); G06F 3/013 (2013.01); G06T 3/4038 (2013.01); G06T 7/246 (2017.01); G09G 3/002 (2013.01); G09G 3/3413 (2013.01); H04N 23/56 (2023.01); H04N 23/698 (2023.01); G02B 2027/0105 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0187 (2013.01); G06T 2207/30201 (2013.01); G09G 2310/0235 (2013.01); H04N 23/10 (2023.01);
Abstract

A pupil-replicating lightguide includes a slab of transparent material, a switchable out-coupling grating for out-coupling portions of image light to propagate towards an eyebox, and a switchable tracking grating for redirecting tracking light carrying an eye image towards an eye tracking camera. One of the two gratings may be turned ON while the other is turned OFF, in a time-sequential manner, allowing the combined use of the pupil-replicating lightguide for carrying image light and eye tracking light.

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