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. 09, 2010
Filed:
Feb. 15, 2007
Yung-hsin Chiang, Taipei County, TW;
Shih-yuan Wang, Tai-Nan, TW;
Yung-Hsin Chiang, Taipei County, TW;
Shih-Yuan Wang, Tai-Nan, TW;
ADDtek Corp., Songshan District, Taipei, TW;
Abstract
A driving circuit includes at least one light-emitting device, a voltage regulator circuit, an analysis and decision circuit, and a selecting circuit. The voltage regulator circuit is coupled to the light-emitting device for providing a driving voltage to drive the light-emitting device. The analysis and decision circuit is coupled to the light-emitting device for determining whether the light-emitting device is open-circuited to generate a decision result. The selecting circuit is coupled between the analysis and decision circuit and the voltage regulator circuit for selecting a maximum forward bias voltage corresponding to the light-emitting device to generate a feedback signal according to the decision result and for transmitting the feedback signal to the voltage regulator circuit. The voltage regulator circuit adjusts the driving voltage according to the feedback signal.