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. 03, 2013
Filed:
Feb. 10, 2012
Zhimou Ren, Chengdu, CN;
Ching-chuan Kuo, Taipei, TW;
Tiesheng Yan, Chengdu, CN;
Yunning Xie, Chengdu, CN;
Jun Ren, Chengdu, CN;
Zhimou Ren, Chengdu, CN;
Ching-Chuan Kuo, Taipei, TW;
Tiesheng Yan, Chengdu, CN;
Yunning Xie, Chengdu, CN;
Jun Ren, Chengdu, CN;
O2Micro Inc., Santa Clara, CA (US);
Abstract
Embodiments of the invention provided a driving circuit for powering a light-emitting diode (LED) light source. The driving circuit includes a rectifier, a filter capacitor, and a control circuit. The rectifier converts an AC voltage from an AC power source to a rectified AC voltage. The filter capacitor coupled to the rectifier filters the rectified AC voltage to provide a DC voltage. The control circuit controls power supplied to the LED light source. The control circuit enables a discharging current periodically to discharge the filter capacitor if a switch coupled between an AC power source and a rectifier is turned off and disables the discharging current if the control circuit determines that the switch is turned on.