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:
Feb. 22, 2005
Filed:
Apr. 01, 2002
Kenji Fuse, Yokosuka, JP;
Mikio Shiraishi, Yokohama, JP;
Yasuo Otsuka, Chigasaki, JP;
Nobuyuki Kaku, Kanagawa, JP;
Hidehiro Ikeda, Fujisawa, JP;
Kenji Fuse, Yokosuka, JP;
Mikio Shiraishi, Yokohama, JP;
Yasuo Otsuka, Chigasaki, JP;
Nobuyuki Kaku, Kanagawa, JP;
Hidehiro Ikeda, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An optical equipment having a discharge lamp for supplying light and a light valve device for projecting the light from the equipment having an air intake opening arranged on one side of the equipment. A ventilation device is associated with the air intake opening so as to draw in air from outside of the equipment through the air intake opening and a ventilation path arranged so as to extend from an outlet of the ventilation device continuously. The ventilation path includes a partition member proximate to an outlet of the ventilation device and air flow through the ventilation path is divided into a plurality of air flows by the partition member so as to cool different parts of the light valve device respectively.