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. 25, 2012
Filed:
Jul. 10, 2009
Taisuke Murata, Tokyo, JP;
Taisuke Murata, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A projection-type image display apparatus that projects an image onto a screen and includes a laser light source, an optical engine, a projection lens, and a control unit. The laser light source includes a plurality of light source units that respectively emit laser beams of different wavelengths. The optical engine combines the laser beams received from the light source and forms an image. An optical sensor is arranged in the optical engine to detect a physical property of a uniformly-scattered laser beam and outputs a physical property signal indicative of the detected physical property to the control unit. The control unit controls output powers of the light source units based on the physical property signal.