Patent ID: 7990071
Filing Date: 2011-08-02
Classification: H05B

Abstract:
1. A lamp drive circuit used for driving a plurality of lamps comprising a first lamp, a second lamp, a third lamp, and a fourth lamp, wherein the lamp drive circuit comprises: a power supply circuit comprising a first output terminal and a second output terminal used for providing an alternate voltage; a first balance circuit, coupled to the first output terminal, for driving at least the first lamp and the second lamp, the first balance circuit comprising: wherein a voltage across the first coil of the first balance circuit corresponds to a voltage across the second coil of the first balance circuit; and a second balance circuit, coupled to the second output terminal, for driving at least the third lamp and the fourth lamps, the second balance circuit comprising: wherein a voltage across the first coil of the second balance circuit corresponds to a voltage across the second coil of the second balance circuit.