Patent ID: 7362103

Claim:
A system for driving a plurality of lamps, comprising: an inverter circuit comprising a plurality of outputs, wherein the plurality of outputs are divided into a first output part and a second output part; and a fault detecting circuit for detecting whether one or more of the plurality of outputs of the inverter circuit is faulty, comprising: a magnetic element circuit for generating an induction signal according to flux changes thereof when one or more of the plurality of outputs is faulty, the magnetic element circuit comprising: a first magnetic element winding connected to the first output part; and a second magnetic element winding connected to the second output part; and a signal detecting circuit for generating a fault signal according to the induction signal; wherein a winding ratio between the first magnetic element winding and the second magnetic element winding is the inverse of a ratio between a number of outputs of the first output part and a number of outputs of the second output part.