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. 13, 2012
Filed:
Mar. 31, 2010
Toshizo Nishi, Matsumoto, JP;
Toshihiko Nagumo, Matsumoto, JP;
Masahiro Saito, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A light source device includes: a light emitting tube; a reflecting mirror; and a tubular member disposed on a forward side of light emission of the reflecting mirror, and surrounding the light emitting tube, the tubular member has a pair of air circulating units communicating inside and outside of the tubular member and adapted to allow introduction of external air from the forward side toward a backward side of the light emission in a vertically symmetrical manner on a center axis of the light emitting tube, inside the air circulating unit there is disposed a air flow guide member, and the air flow guide member is pivoted rotatably around a predetermined rotational axis with respect to the air circulating unit under own weight of the air flow guide member, and rotates to thereby open and block at least a part of a flow passage inside the air circulating unit.