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. 10, 2008
Filed:
Mar. 22, 2005
Ryuji Suzuki, Saitama, JP;
Ryuji Suzuki, Saitama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed is a projection display device which projects an image onto a projection surface by a projection optical system by using light from a light source and which helps to realize efficient light source cooling. The projection display device includes: a cooling fan arranged between the projection optical system and the light source and adapted to supply cooling air from the projection optical system to the light source; and an exterior case having an exhaust port in the vicinity of the light source and covering the projection optical system, the cooling fan, and the light source, the projection optical system, the cooling fan, the light source, and the exhaust port being arranged substantially in a straight line.