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:
Jun. 10, 2014
Filed:
May. 07, 2012
Applicants:
Joshua O. Miller, Woodinville, WA (US);
Scott Woltman, Lynnwood, WA (US);
Inventors:
Joshua O. Miller, Woodinville, WA (US);
Scott Woltman, Lynnwood, WA (US);
Assignee:
Microvision, Inc., Redmond, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection apparatus includes a shutter mechanism to prevent light from reaching an image plane during calibration of light sources. The shutter mechanism may include liquid crystal material that exhibits an effective index of refraction that varies with applied voltage. During calibration, a light beam is shuttered, light sources are driven by calibration data, and optical power is measured.