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:
Jul. 21, 2009
Filed:
Feb. 14, 2002
Applicants:
Hisashi Nakamura, Kobe, JP;
Kouji Terami, Higashiosaka, JP;
Toshiyuki Okino, Osaka, JP;
Inventors:
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 3/36 (2006.01); G03B 21/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A liquid crystal projector provided with a cooling fan comprises a temperature sensor for detecting the internal temperature of the liquid crystal projector, an air pressure sensor for detecting outside air pressure, and a control device for controlling the number of revolutions of the cooling fan on the basis of the temperature detected by the temperature sensor and the outside air pressure detected by the air pressure sensor.