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. 19, 2013
Filed:
Nov. 09, 2010
Applicants:
Pei-cheng Huang, Jhubei, TW;
Jing-meng Liu, Zhubei, TW;
Roland Van Roy, Eindhoven, NL;
Inventors:
Assignee:
Richtek Technology Corporation, R.O.C., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 41/16 (2006.01); H05B 41/24 (2006.01); H05B 37/00 (2006.01); H05B 39/00 (2006.01); H05B 41/00 (2006.01); H05B 37/02 (2006.01); H05B 39/04 (2006.01); G05F 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention discloses a light emitting device driver circuit and a method for driving a light emitting device. In the present invention, the secondary windings of a transformer provide positive and negative secondary voltages, so as to generate positive and negative output voltages. A light emitting device circuit is coupled between the positive and negative output voltages. As such, the specification to withstand high voltage for a device in the circuit is reduced.