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. 09, 2015
Filed:
Aug. 26, 2014
Seiko Epson Corporation, Tokyo, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A light source device including an arc tube having a light emission portion containing electrodes, a cooling channel having a downstream part branched into first and second channels to guide air toward the light emission portion via one of the channels, a rotational member disposed within the cooling channel and rotatable around a rotation shaft by gravity, and configured to switch cooling to the first or second channel depending on a position of the light source device, and a duct that forms apart of the cooling channel. The width of the rotational member decreases from a remote end toward the rotation shaft. The rotation shaft is disposed on one end of the rotational member corresponding to a side opposite a light emission side of the duct. The duct is shaped such that the cooling channel width decreases toward the side opposite the light emission side.