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    • 9. 发明授权
    • Driving circuit for multi-lamps
    • 多灯驱动电路
    • US08120262B2
    • 2012-02-21
    • US11983636
    • 2007-11-08
    • Steve LeeJohn WangXuefang Yang
    • Steve LeeJohn WangXuefang Yang
    • H05B37/00
    • H05B41/282Y02B20/183
    • 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.
    • 电路用于驱动诸如冷阴极荧光灯(CCFL)的多个灯。 配对的灯形成多对灯。 多对灯具中的每一对具有串联连接的两个灯。 多对灯并联。 电路包括开关电路,变压器和多个平衡扼流圈。 开关电路用于将DC电力转换成第一AC电力。 变压器具有初级绕组和次级绕组。 变压器的初级绕组耦合到开关电路,用于接收所述第一AC电力并激励次级绕组以从次级绕组产生第二AC电力以激励多个灯。 每个平衡扼流圈包括第一绕组和第二绕组。 每个平衡扼流圈的第一绕组和第二绕组分别耦合到多对灯中的两个,以平衡流过这两对灯的电流。