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:
Dec. 31, 2013
Filed:
Jun. 12, 2009
Shinji Yagyu, Tokyo, JP;
Shinji Yagyu, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In a projection display apparatus in which a laser beam source and an optical engine are connected together through an optical fiber, safety is improved against temperature rise in the optical fiber and its periphery. A projection display apparatus includes a temperature sensorprovided on the end portion, of the side of an optical engine, of an optical fiber groupfor connecting a laser beam sourceand the optical engineto each other, in which, by detecting temperature and informing to a controlling unitfor controlling the laser beam source, when temperature rise exceeding a set value having been set previously is detected, the controlling unitis made to control so as to decrease or stop output from the laser beam source