Fluorescent lamp starting process controlling circuit and control method therefor

一种荧光灯启动过程控制电路及其控制方法

Abstract

本发明公开了一种荧光灯启动过程控制电路及其控制方法,电路包括外接电容、与外接电容相连的开关S<sub>0</sub>、S<sub>1</sub>、若干由两开关串联而成的开关组组0至组N,组0包括开关S<sub>00</sub>和S<sub>10</sub>,……,组N包括开关S<sub>0N</sub>和S<sub>1N</sub>,每组两个开关分别控制两个大小相同的电流源,它们之间的结点与外接电容相连;方法包括仅开关S<sub>0</sub>导通的高频预热、扫频点火以及仅开关S<sub>0</sub>关断的低频正常工作,扫频点火时,在开关S<sub>0</sub>和S<sub>1</sub>关断,组0至组N中的开关S<sub>00</sub>,……,S<sub>0N</sub>导通,组0至组N中的开关S<sub>10</sub>,……,S<sub>1N</sub>全部关断,然后依次打开关S<sub>10</sub>,……,S<sub>1N</sub>中的一个或某几个,其余关断。本发明采用数字化的方法控制实现荧光灯启动所需的高频预热、扫频点火及低频工作过程。
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