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. 07, 2005
Filed:
Dec. 09, 2003
Haruyoshi Yamada, Shiojiri, JP;
Nobuo Watanabe, Shiojiri, JP;
Haruyoshi Yamada, Shiojiri, JP;
Nobuo Watanabe, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A pair of openings () symmetrically disposed around an optical axis of the reflector () is formed on a contact surface of a light-transmissive plate () and the reflector () and a cooling channel () for introducing cooling air to a source lamp () through the pair of openings () and a first and a second cooling channel shutters () for shutting the cooling channel () when the case is detached from a projector () are provided on a case (). The source lamp () can be efficiently cooled, so that the life of the source lamp () can be lengthened. Even when a light-emitting tube of the source lamp () is exploded while using the projector (), the fragments of the light-emitting tube do not fall outside in exchanging the light source (), and cooling efficiency of the source lamp () is not impaired.