Ballast circuit with independent lamp control
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Jan 31, 2002
app pub date -
Feb 21, 2001
filing date -
Feb 25, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present invention provides a ballast circuit that allows independent control over a plurity of lamps. In one embodiment, the ballast circuit receives power from two independent AC sources to independently energize two lamps. The ballast circuit includes a rectifier that receives input AC signals from the independent AC sources and applies a DC voltage to an inverter. The inverter in turn can apply an AC voltage to the lamps. The ballast further includes two bias circuits, each of which permits the application of the inverter AC signal to one of the lamps when one input AC signal is present and inhibits the application of the inverter AC signal to that lamp when the input AC signal is not present.
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