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:
Oct. 26, 2010
Filed:
Jul. 27, 2007
Margaret K. Brown, Seattle, WA (US);
Randall B. Sprague, Carnation, WA (US);
Michael L. Schaaf, Bainbridge Island, WA (US);
Bin Xue, Mukilteo, WA (US);
Margaret K. Brown, Seattle, WA (US);
Randall B. Sprague, Carnation, WA (US);
Michael L. Schaaf, Bainbridge Island, WA (US);
Bin Xue, Mukilteo, WA (US);
Microvision, Inc., Redmond, WA (US);
Abstract
The temperature of a laser diode changes in response to video content across a line of a displayed image, and the radiance changes as a function of temperature. An adaptive model estimates the temperature of the laser diode based on prior drive current values. For each displayed pixel, diode drive current is determined from the estimated diode temperature and a desired radiance value. A feedback circuit periodically measures the actual temperature and updates the adaptive model.