Fluorescent light control
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United States of America Patent
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-
Oct 12, 2010
Grant Date -
Oct 15, 2009
app pub date -
Apr 14, 2008
filing date -
Apr 14, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Circuitry, which is compatible with incandescent light dimmers, is disposed within the screwbase of a compact fluorescent light, and sets driving frequencies for a mercury plasma, based, at least in part, on sensing the duty cycle of the incoming AC supply waveform. In this way, existing lighting infrastructure, including phase-cut dimmer circuits for incandescent light bulbs, may be preserved, and incandescent bulbs can be replaced with compact fluorescent lights equipped with circuitry in accordance with the present invention. In a further aspect, the circuitry synchronizes the bulb drive signals with the AC power line frequency.
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