Patent ID: 7282868
Filing Date: 2007-10-16
Classification: H01F,H05B

Abstract:
1. An inverter circuit for discharge lamps for multi-lamp lighting said circuit comprising: at least two coils connected to a secondary winding of a step-up transformer of the inverter circuit, the at least two coils being arranged and magnetically coupled to each other to form a shunt transformer for shunting current such that magnetic fluxes generated by the at least two coils are opposed to each other to cancel out, the at least two coils being configured to ensure a sufficient inductance for the shunting transformer, discharge lamps connected to said coils, respectively, with currents flowing therethrough being balanced with each other, wherein a large number of discharge lamps are arranged as backlights in a surface light source, an electric conductor being arranged adjacent to said discharge lamps, wherein