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:
Mar. 12, 2013
Filed:
Jun. 17, 2010
Kaname Nagatani, Matsumoto, JP;
Kunihiko Takagi, Okaya, JP;
Tetsuo Shimizu, Matsumoto, JP;
Yuji Takado, Matsumoto, JP;
Akira Egawa, Shiojiri, JP;
Satoshi Kinoshita, Matsumoto, JP;
Kaname Nagatani, Matsumoto, JP;
Kunihiko Takagi, Okaya, JP;
Tetsuo Shimizu, Matsumoto, JP;
Yuji Takado, Matsumoto, JP;
Akira Egawa, Shiojiri, JP;
Satoshi Kinoshita, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A light source unit includes: an arc tube having a light-emitting portion; a secondary reflector covering part of the periphery of the light-emitting portion and being provided with a secondary reflecting surface for reflecting light emitted from the light-emitting portion; a primary reflector having a primary reflecting surface for reflecting the light emitted from the light-emitting portion and the light reflected from the secondary reflector; a first electrode; and a second electrode; wherein the second electrode is arranged at a position which causes an ionic wind to be induced by applying a voltage between the second electrode and the first electrode and causes air between the secondary reflecting surface and the light-emitting portion to flow, and either one of the first electrode or the second electrode is arranged between the arc tube and the secondary reflector.