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.:
Date of Patent:
Apr. 16, 2024
Filed:
Jan. 06, 2023
Applicant:
Google Llc, Mountain View, CA (US);
Inventors:
Stuart James Myron Nicholson, Waterloo, CA;
Timothy Paul Bodiya, Toronto, CA;
Assignee:
GOOGLE LLC, Mountain View, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); F21V 8/00 (2006.01); G02B 6/00 (2006.01); G02C 11/00 (2006.01); G02B 26/08 (2006.01); G02B 26/10 (2006.01); G02C 5/22 (2006.01); H01S 5/00 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0172 (2013.01); G02B 6/0023 (2013.01); G02B 6/005 (2013.01); G02C 11/10 (2013.01); G02B 26/0816 (2013.01); G02B 26/10 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/014 (2013.01); G02B 2027/0178 (2013.01); G02C 5/22 (2013.01); H01S 5/0014 (2013.01);
Abstract
A wearable heads-up display includes a power source, laser sources, and a lightguide. A photodetector is positioned to detect an intensity of a test light emitted at a perimeter of the lightguide from an optical path within the lightguide. A laser safety circuit provides a control to reduce or shut off a supply of electrical power from the power source to the laser sources in response to an output signal from the photodetector indicating that the detected intensity is below a threshold.