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. 22, 2003
Filed:
Aug. 16, 2001
Applicant:
Inventors:
Satoshi Hosoda, Daito, JP;
Kenji Yamauchi, Kobe, JP;
Kouji Terami, Higashiosaka, JP;
Yoshihiko Yano, Kyotanabe, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 2/116 ;
U.S. Cl.
CPC ...
G03B 2/116 ;
Abstract
A liquid crystal projector provided with one or a plurality of cooling fans comprises a temperature sensor for sensing the internal temperature of the liquid crystal projector, and a driving control circuit for controlling the driving voltage of the cooling fan on the basis of the temperature sensed by the temperature sensor. A driving control circuit controls the driving voltage of the cooling fan in proportion to the temperature sensed by the temperature sensor in a case where the temperature sensed by the temperature sensor is within a predetermined range.