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:
Apr. 04, 2006
Filed:
Feb. 11, 2005
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
A projection type display apparatus including a discharge lamp for supplying light, a light valve device and first and second air intake openings arranged on different sides of the apparatus. A centrifugal fan is associated with the first air intake opening so as to draw in outside air and form a first ventilation air flow from the first air intake opening through a lower side of the light valve device so as to cool the light valve device. A fan is associated with the second air intake opening so as to draw in outside air and form a second ventilation air flow so as to cool optical elements including lenses. An exhaust opening is arranged on a further side of the apparatus, and an exhaust is fan arranged proximate to a discharge lamp so as to draw out air including the first and second ventilation air flow therethrough.