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. 24, 2013
Filed:
Mar. 25, 2011
Akira Egawa, Nagano-ken, JP;
Yasushi Tateno, Nagano-ken, JP;
Fumihide Sasaki, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A projector includes: an optical modulation device configured to modulate an incident luminous flux; a projection optical device configured to project the luminous flux modulated by the optical modulation device; and a cooling device configured to cool the optical modulation device, wherein the cooling device includes a cooling fan, and a duct having a discharge portion that causes the air discharged from the cooling fan to circulate in a direction approximately parallel to the optical axis, and discharges it to a lateral side of the optical modulation device, and the duct is disposed in a state that, when the projection optical device and discharge portion are cut by a plane perpendicular to the optical axis, the height position of a first center between the upper end and lower end of the cross-section of the discharge portion and that of the optical axis differ from one another.