Driving circuit for lamp

Details Driving circuit for lamp Driving circuit for lamp

2007-05-08

2010-10-05

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C361S018000, C335S301000

Reexamination Certificate

active

07808188

ABSTRACT:
A driving circuit for driving at least one lamp includes a power switching circuit, a first transformer and a feedback control circuit. The power switching circuit is electrically connected with a power source to generate an input current. The first transformer includes a primary winding and a secondary winding. The primary winding is electrically connected with the power switching circuit. The secondary winding is for transforming the input current to drive the lamp. The feedback control circuit is connected in parallel with the primary winding in order to measure a voltage variation of the primary side and output a power control signal. The power switching circuit adjusts a current for driving the lamp according to the power control signal.

REFERENCES:
patent: 2004/0130273 (2004-07-01), Alexandrov

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