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. 01, 2014
Filed:
Feb. 21, 2012
Jung-chi Chen, Hsin-Chu, TW;
Po-yen Wu, Hsin-Chu, TW;
Chih-lin Wang, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
A control circuit is applied into a projector and an operation method is provided for the projector. The projector includes a photo sensor provided for generating a sensing voltage according to light intensity sensed by the photo sensor. The control circuit includes a first voltage-comparing unit, a reference voltage generating unit and a second voltage-comparing unit. The first voltage-comparing unit is provided for comparing the sensing voltage and a first reference voltage, to generate a first comprising result. The reference-voltage generating unit is provided for generating a second reference voltage and determining whether adjusting the second reference voltage according to the first comparing result. The second reference voltage is relatively larger than the first reference voltage. The second voltage-comparing unit is provided for comparing the sensing voltage and the second reference voltage, to generate a second comparing result.