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    • 20. 发明申请
    • 多灯管电流的控制方法及多灯管驱动电路
    • WO2008040251A1
    • 2008-04-10
    • PCT/CN2007/070788
    • 2007-09-26
    • 唯冠科技(深圳)有限公司杨东平
    • 杨东平
    • H05B41/282
    • H05B41/2827
    • This invention discloses a multi-lamps electric current control method which includes: When any of the said multi-lamps is open or the resonance circuit parameter is changed, the output voltage of the transformer is adjusted to ensure the output voltage of the transformer conforms to the range determined by the relation between the output voltage and the frequency of the said transformer required to stabilize the current of a single lamp, and the relation between the said lamp and the voltage and the frequency of the capacitance series circuit, so as to stabilize the current value of each of the lamps. The multi-lamps driving circuit disclosed in this invention has the operating mode controlling unit which includes the storage module to store the data of the relationship curve of the voltage and the frequency of the said lamp and the capacitance series circuit, and the controlling module used to control the voltage output from the transformer falling into the range determined by the relation between the voltage and the frequency of the said transformer to keep the current of a single lamp stable, and the relationship curve between the said voltage and the frequency. This invention can precisely control the current of a lamp to ensure a stable illumination and normal operating condition of the current even under interference.