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:
Feb. 01, 2011
Filed:
Mar. 21, 2007
Applicants:
Shun-chieh Yang, Taipei Hsien, TW;
Chun-ming Shen, Taipei, TW;
Inventors:
Shun-Chieh Yang, Taipei Hsien, TW;
Chun-Ming Shen, Taipei, TW;
Assignee:
Qisda Corporation, Taoyuan County, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/16 (2006.01); G03B 21/18 (2006.01); G03B 21/00 (2006.01); H01J 17/28 (2006.01); H01J 19/74 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for controlling a cooling device within a projecting system is provided. The cooling device cools the projecting system with a predetermined period after the illumination device of the projecting system is turned off. Then, after the projecting system is restarted, it is detected that whether the illumination device is lighted or not. As the illuminating device is not lighted, the predetermined period is extended.