High intensity discharge lamp self-adjusting ballast system sensitive to the radiant energy or heat of the lamp
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United States of America Patent
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Jul 21, 1987
Grant Date -
N/A
app pub date -
Aug 28, 1985
filing date -
Aug 28, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A self-adjusting ballast system for a high intensity discharge lamp. A lightweight, inexpensive and efficient ballast controls the strike and warmup stages of the high intensity discharge lamp, in particular high wattage lamps, through direct sensing of the radiant energy or heat output of the lamp itself. A current controller corrects for current imbalance in the alternating current lamp circuit due to bulb rectification or magnetic imbalance in the inverter transformer system.
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