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. 01, 2015
Filed:
Sep. 29, 2010
Koji Hirata, Yokohama, JP;
Masayuki Fukui, Yokohama, JP;
Chohei Ono, Kawasaki, JP;
Hideharu Saito, Yokohama, JP;
Takeshi Katayama, Yokohama, JP;
Koji Hirata, Yokohama, JP;
Masayuki Fukui, Yokohama, JP;
Chohei Ono, Kawasaki, JP;
Hideharu Saito, Yokohama, JP;
Takeshi Katayama, Yokohama, JP;
Hitachi Maxell, Ltd., Ibaraki-shi, JP;
Abstract
In a projection image displaying device which projects imaging light emitted from a projection lens by being reflected by a projection mirror, an air inlet for sucking external air is provided at the position of a sealing mechanism of the projection mirror. Air blown off through openings provided around the projection lens is sucked into a case through this air inlet. When a cooling operation of cooling components within the case is to be performed by sealing the projection mirror, a sucking operation through the air inlet is stopped. This prevents dust in the external air from adhering to a reflective surface of the projection mirror regardless of the installation state of the projection image displaying device.