Driving circuit for lamp
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United States of America Patent
Stats
-
Oct 5, 2010
Grant Date -
Dec 20, 2007
app pub date -
May 8, 2007
filing date -
Jun 15, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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