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. 07, 2015
Filed:
Dec. 28, 2012
AU Optronics Corp., Hsin-Chu, TW;
Chun-Hsien Lin, Hsin-Chu, TW;
Chin-Shun Chen, Hsin-Chu, TW;
AU OPTRONICS CORP., Hsin-Chu, TW;
Abstract
A LED string driving circuit includes a plurality of LED strings; a power supply unit configured to receive an input voltage and accordingly output a driving voltage to the LED strings; a comparison unit configured to receive the input voltage and output a first control signal according to a relationship between the input voltage and a predetermined voltage; a control unit configured to receive the first control signal and generate a second control signal according to a potential level of the first control signal; and a switch unit including a plurality of switch elements, and each are controlled by the second control signal and thereby forming various electrical loops and thereby configuring the LED strings corporately to form either a parallel loop or a series loop via the switch unit with respective electrical loops. A LED string driving method is also provided.