Patent ID: 8193723

Claim:
A light-emitting diode (LED) current-balance driving circuit for driving a plurality of LED strings, the LED current-balance driving circuit comprising: a feedback transformer having a detecting winding and an outputting winding for outputting a feedback signal; a plurality of current-balance transformers, each of the current-balance transformers having a primary winding and a secondary winding, the primary windings of the current-balance transformers and the detecting winding of the feedback transformer being coupled in series to compose a current-balance loop with an alternating-current (AC) power being supplied thereto; a plurality of full-wave rectifiers, each of the full-wave rectifiers being coupled between a corresponding secondary winding of the current balance transformers and a corresponding LED string of the LED strings; and a current control circuit for receiving the feedback signal and controlling the AC power according to the feedback signal.