Method for driving a fluorescent lamp and an inverter...

Details Method for driving a fluorescent lamp and an inverter... Method for driving a fluorescent lamp and an inverter...

2007-08-28

2007-08-28

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S308000, C315S247000, C315S274000, C363S021030, C363S021090, C363S021100

Reexamination Certificate

active

11198143

ABSTRACT:
A method for driving a fluorescent lamp and an inverter circuit for performing the same are used to reduce an amount of electromagnetic interference (EMI) generated by a transformer and an instantaneous loading of a DC voltage source. The inverter circuit comprises a DC square wave voltage source, a bridge DC/AC converter, a transformer, a feedback control unit and a voltage control circuit wherein the voltage control circuit is coupled to the DC voltage source, the bridge DC/AC converter and the feedback control unit. The voltage control circuit is used to convert DC voltage provided by the DC voltage source into a two-level DC square wave, which in turn converts the two-level DC square wave into an AC quasi-sine wave to drive the fluorescent lamp through the bridge DC/AC converter and the transformer. The feedback control unit generates signals to control the voltage control circuit and the bridge DC/AC converter.

REFERENCES:
patent: 6969958 (2005-11-01), Henry
patent: 2002/0117971 (2002-08-01), Ito et al.
patent: 2003/0214478 (2003-11-01), Yoo et al.
patent: 2003/0227263 (2003-12-01), Benensohn

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