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:
May. 27, 2008
Filed:
Aug. 02, 2005
Shigeo Nojima, Suwa, JP;
Masatoshi Yonekubo, Hara-mura, JP;
Takashi Takeda, Suwa, JP;
Tetsuro Yamazaki, Suwa, JP;
Shigeo Nojima, Suwa, JP;
Masatoshi Yonekubo, Hara-mura, JP;
Takashi Takeda, Suwa, JP;
Tetsuro Yamazaki, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A projector of rear-projection type including a light source that outputs a laser beam and a scanner that scans a screen with the laser beam. When a laser beam with energy exceeds an accessible emission limit due to failure of the light source or the scanner, at least one optical member located in an optical path of the laser beam is arranged so as to be broken or altered in quality and to prevent or discourage the beam with energy exceeding the accessible emission limit from being output from the screen.