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:
Dec. 04, 2012
Filed:
Jun. 25, 2010
Tiesheng Yan, Chengdu, CN;
Zhimou Ren, Chengdu, CN;
Jun Ren, Chengdu, CN;
Ching-chuan Kuo, Taipei, TW;
Tiesheng Yan, Chengdu, CN;
Zhimou Ren, Chengdu, CN;
Jun Ren, Chengdu, CN;
Ching-Chuan Kuo, Taipei, TW;
O2Micro, Inc., Santa Clara, CA (US);
Abstract
A driving circuit for driving a light source includes a power converter, a controller and a voltage-controlled current source. The power converter is coupled to the light source, and receives an input voltage from a power source and provides an output voltage to the light source. The power converter includes a switch coupled in series with the light source. The controller is coupled to the power converter and controls a power of the light source by controlling the switch. The voltage-controlled current source is coupled to the controller and provides a first current. The controller controls the switch based on the first current.