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:
May. 21, 2013
Filed:
Sep. 25, 2011
Shian-sung Shiu, New Taipei, TW;
Li-min Lee, New Taipei, TW;
Chung-che Yu, New Taipei, TW;
Xi Tu, Wuxi, CN;
Ying Wang, Wuxi, CN;
Shian-Sung Shiu, New Taipei, TW;
Li-Min Lee, New Taipei, TW;
Chung-Che Yu, New Taipei, TW;
Xi Tu, Wuxi, CN;
Ying Wang, Wuxi, CN;
Green Solution Technology Co., Ltd., New Taipei, TW;
Abstract
An LED driving circuit includes a first and a second LED modules, a first and a second switching converters, an extreme voltage detecting and selecting circuit, a current balance circuit and a controller. The first switching converter transforms electric power of an input power supply into a first output voltage for lighting the first LED module. The second switching converter transforms electric power of the input power supply into a second output voltage for lighting the second LED module. The current balance circuit balances the currents flowing through the first and the second LED modules. The extreme voltage detecting and selecting circuit detects the first and the second LED modules and selects to output one of detecting results. The controller controls the transforming of the first switching converter and the second switching converter to light the first and the second LED modules in response to the outputted detecting result.