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:
Sep. 22, 2015
Filed:
Oct. 31, 2013
Applicant:
Microvision, Inc., Redmond, WA (US);
Inventors:
Scott Woltman, Lynnwood, WA (US);
Robert James Jackson, Monroe, WA (US);
Assignee:
Microvision, Inc., Redmond, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/26 (2006.01); G03B 21/20 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G03B 21/2086 (2013.01); G03B 21/2053 (2013.01); G03B 21/26 (2013.01); H04N 9/3129 (2013.01); H04N 9/3194 (2013.01);
Abstract
A scanning laser projector detects obstructions in a projector field of view using a proximity detector that detects infrared light at a photodetector. The photodetector is tested with an additional infrared light source. The additional infrared light source may also be used as proximity detector that can detect a local obstruction blocking the photodetector.