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:
Sep. 03, 2013
Filed:
Oct. 28, 2010
Li-wei Lin, Zhonghe, TW;
Chen-chiang Lee, Zhonghe, TW;
Chi-hsin Lee, Zhonghe, TW;
Wen-ming Lin, Zhonghe, TW;
Chun-chi Liao, Zhonghe, TW;
Yuan-po Huang, Zhonghe, TW;
Li-Wei Lin, Zhonghe, TW;
Chen-Chiang Lee, Zhonghe, TW;
Chi-Hsin Lee, Zhonghe, TW;
Wen-Ming Lin, Zhonghe, TW;
Chun-Chi Liao, Zhonghe, TW;
Yuan-Po Huang, Zhonghe, TW;
Top Victory Investments Ltd., Harbour, HK;
Abstract
A light-emitting diode (LED) driving circuit for driving a plurality of first lightbars and a plurality of second lightbars includes a first current mirror, a second current mirror and a control circuit. The first current mirror, if enabled, balances current among the first lightbars. The second current mirror, if enabled, balances current among the second lightbars. During a first period, the control circuit disables the second current mirror and adjusts the duration of enabling the first current mirror according to a dimming signal. During a second period, the control circuit disables the first current mirror and adjusts the duration of enabling the second current mirror according to the dimming signal. Therefore, only first or second lightbars are driven in each period.