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:
Oct. 26, 2004
Filed:
Jul. 10, 2001
Yasumasa Sawai, Yamatotakada, JP;
Iwao Adachi, Moriguchi, JP;
Satoshi Onishi, Sakai, JP;
Kazuhiko Inoue, Suita, JP;
Hideki Nagata, Kobe, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
A projector, which projects color images using the three liquid crystal panels ( ) while cooling them by the fans ( ) for G, R, and B panels, comprises the level calculation unit ( ) for finding the intensity levels of the R, G, and B components of image signals, the level calculation unit ( ) for finding the voice levels of voice signals, the fan control unit ( ) for controlling the numbers of revolutions of the fans ( ), and the memory ( ) for storing the cumulative amount of lighting time of the lamp ( ). As the intensity levels get higher, the numbers of revolutions of the fans are increased, and as the cumulative amount of lighting time becomes larger, the numbers of revolutions of the fans are decreased. As a result, unnecessary noises caused by the fans ( ) can be reduced while the liquid crystal panels ( ) are properly cooled. Thus, the present invention has an object of reducing the noise of the fan which cools the display devices such as liquid crystal panels in a projector. Thus, the object of the present invention is to realize a reduction in noise caused by the fan for cooling a display device such as liquid crystal panels in a projector.