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:
Mar. 07, 2006
Filed:
Mar. 31, 2004
Applicant:
Yoshihiko Yano, Kyotanabe, JP;
Inventor:
Yoshihiko Yano, Kyotanabe, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/18 (2006.01); G03B 21/26 (2006.01); G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
Abstract
A liquid crystal projector comprises a detector for detecting whether a cooling fan is stopped or is being rotated, a first controller for gradually raising a voltage to be applied to the cooling fan when the cooling fan is started, and a second controller for setting the voltage to be applied to the cooling fan to a predetermined normal operating voltage when the detector detects that the cooling fan is rotated in the process of gradually raising the voltage to be applied to the cooling fan by the first controller.