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:
Aug. 28, 2012
Filed:
Nov. 09, 2009
Gregory T. Gibson, Snohomish, WA (US);
Joshua M. Hudman, Sammamish, WA (US);
Margaret K. Brown, Seattle, WA (US);
Christian Dean Dejong, Sammamish, WA (US);
Gregory T. Gibson, Snohomish, WA (US);
Joshua M. Hudman, Sammamish, WA (US);
Margaret K. Brown, Seattle, WA (US);
Christian Dean DeJong, Sammamish, WA (US);
Microvision, Inc., Redmond, WA (US);
Abstract
A encoded image projection system () is configured to determine the proximity of the system to a projection surface (). The encoded image projection system () includes a light encoder () that scans a non-visible light beam () on the projection surface () selectively when scanning visible light to create an image. A detector () is then configured to receive reflections of the non-visible light beam () from the projection surface (). A control circuit () is configured to determine the distance () between the projection surface () and the system from, for example, intensity data or location data received from the detector (). Where the distances () are below a threshold, the control circuit () can either reduce the output power of the system or turn the system off.