Fluorescent lamp starting process controlling circuit and control method therefor



The present invention discloses a starting procedure control circuit of fluorescent lamp and a control method thereof. The circuit comprises a periphery capacitor, switches of S0 and S1 connected with the periphery capacitor, a plurality of switch group of group 0 to group N which are formed through the series connection of two switches. Group 0 comprises switches of S00 and S10,..., and group N comprise switches of S0N and S1N. Two switches in each group respectively control two current sources with same magnitude, and the binding point between the two switches is connected the periphery capacitor. The method comprises high frequency preheating and frequency sweep ignition when only the switch S0 is conducted; and low frequency normal operation when only the switch S0 is switched off. In frequency sweep ignition, switches of S0 and S1 are all switched off, switches of S00 to S0N in group 0 to group N are all conducted, switches of S10 to S1N in group 0 to group N are all switched off, then one or a plurality of switches selected from S10 to S1N are conducted in sequence, and the rest switches are switched off. The invention adopts a digitized method for controlling the processes of high frequency preheating, frequency sweep ignition and low frequency operation required for actuating the fluorescent lamp.




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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    CN-101859683-AOctober 13, 2010郭修;李守运采用扫频发光方式的新型荧光灯管
    CN-102548168-AJuly 04, 2012苏州博创集成电路设计有限公司Detection and control method for frequency-sweeping igniting and achieving circuit
    CN-102548168-BJanuary 21, 2015苏州博创集成电路设计有限公司一种扫频点火检测与控制的实现电路