Lamp containing voltage conversion circuit including forward/reverse hybrid phase-control clipping circuit
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United States of America Patent
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Dec 2, 2008
Grant Date -
Jul 28, 2005
app pub date -
Apr 1, 2005
filing date -
Apr 1, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lamp contains a lamp voltage conversion circuit which includes a forward/reverse hybrid phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp. The phase-control clipping circuit has a time-based pulse source that triggers conduction of the phase-control clipping circuit independently of line voltage magnitude during time periods spanning polarity changes of the load voltage that are separated by intervals when conduction is not triggered.
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