| 摘要 |
A circuit is used for driving a plurality of lamps, such as Cold Cathode Fluorescent Lamps (CCFLs). The lamps are paired to form a plurality of pairs of lamps. Each of the plurality of pairs of lamps has two lamps which are coupled to each other in series. The plurality of pairs of lamps are coupled in parallel. The circuit comprises a switch circuit, a transformer, and a plurality of balance chokes. The switch circuit is used for converting a DC electric power into a first AC electric power. The transformer has a primary winding and a secondary winding. The primary winding of the transformer is coupled to the switch circuit for receiving said first AC electric power and energizing the secondary winding to generate a second AC electric power from the secondary winding to energize the plurality of lamps. Each of the balance chokes includes a first winding and a second winding. The first winding and the second winding of each of the balance chokes are coupled to two of the plurality of pairs of lamps in series, respectively, so as to balance currents flowing through those two pairs of lamps.
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