Resonant voltage-multiplication, current-regulating and ignition circuit for a fluorescent lamp
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United States of America Patent
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Jan 13, 1998
Grant Date -
N/A
app pub date -
Sep 19, 1995
filing date -
Sep 19, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A voltage-boosting and current-regulating circuit delivers energy from a high voltage resonant circuit source to a fluorescent lamp. A controllable switch is connected in series with the lamp cathodes and is triggered into conduction during a predetermined conductive time interval within each half-cycle of current conducted through the plasma from the resonant circuit. A charging current which flows during the conductive time interval stores energy in the resonant circuit which is subsequently released as a boosted voltage and as increased current flow through the plasma. The boosted voltage allows higher efficiency illumination lamps to the used, and regulation of the conductive time interval achieves the optimal current conduction through the lamp.
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