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:
Sep. 25, 2007
Filed:
Jan. 07, 2005
Wen-wei Tsai, Miao-Li County, TW;
Chi-neng Tseng, Miao-Li County, TW;
Cheng-kuei Chen, Miao-Li County, TW;
Chih-kun Yang, Miao-Li County, TW;
Wen-Wei Tsai, Miao-Li County, TW;
Chi-Neng Tseng, Miao-Li County, TW;
Cheng-Kuei Chen, Miao-Li County, TW;
Chih-Kun Yang, Miao-Li County, TW;
Coretronic Corporation, Miao-Li County, TW;
Abstract
A method and apparatus for an anti-melt projection lens cap includes a sensor that detects whether the projection lens cap covers the projection lens and transmits a detected signal to the control unit including two control modes. The first one is projecting a dark image immediately, as the projection lens cap covers the projection lens for longer than a first set time, the control unit switches to a power-saving mode, when it lasts longer than a second set time, the lamp and the system power supply are turned off, then, a fan cools the lamp, the control unit switches to a standby mode. The second one is switching to the power-saving mode directly, when it lasts longer than a second set time, the lamp and the system power supply are turned off, and a fan cools the lamp, then, the control unit switches to the standby mode.