Patent ID: 8692478

Claim:
A current balancing circuit, comprising: a plurality of light-emitting diode assemblies, at least comprising: a first light-emitting diode assembly; a second light-emitting diode assembly connected to the first light-emitting diode assembly in parallel in reverse order, and connected with the first light-emitting diode assembly through a first common node; and a third light-emitting diode assembly connected to the second light-emitting diode assembly in parallel in reverse order, and connected with the second light-emitting diode assembly through a second common node; an AC power generator for providing currents required by the first light-emitting diode assembly, the second light-emitting diode assembly, and the third light-emitting diode assembly; and a plurality of current-equaling elements, at least comprising: a first current-equaling element connected between the AC power generator and the first common node for balancing a current of the first light-emitting diode assembly and a current of the second light-emitting diode assembly; and a second current-equaling element connected between the AC power generator and the second common node for balancing a current of the second light-emitting diode assembly and a current of the third light-emitting diode assembly.