Electrodeless discharge lamp with spiral induction coil
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United States of America Patent
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Sep 20, 1994
Grant Date -
N/A
app pub date -
Mar 24, 1993
filing date -
Mar 24, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrodeless discharge lamp includes a discharge vessel containing an ionizable vapor, a generator for providing a high frequency signal, and an induction coil adjacent the discharge vessel and connected to the generator. The induction coil is shaped in the form of a planar spiral. The spiral coil is formed of wire or made of metal etched in a spiral pattern onto a substrate. The electrodeless discharge lamp having a spiral induction coil shows low lumen depreciation, a high linear relationship between light output and power input and produces low radio frequency interference.
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