Electrodeless discharge lamp with spiral induction coil
AssigneeDiablo Research Corporation
InventorsRon van Os, Derek Bray
Life of this patent
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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.
Claims16
An electrodeless discharge lamp comprising:
- a discharge vessel containing an ionizable vapor;
- and
- a generator for providing a high-frequency signal to an induction coil;
- the induction coil connected to the generator and disposed adjacent the discharge vessel, the induction coil comprising a conductive path shaped in the form of a substantially planar spiral.
A discharge lamp comprising:
- an upper portion of the lamp formed by a discharge vessel, said discharge vessel including a flat bottom surface and a light-emitting surface;
- a spiral coil substantially in a single plane, located near the bottom surface of the discharge vessel for exciting an electromagnetic field inside the discharge vessel;
- a lower portion of the lamp including a high frequency power supply unit for supplying power to the spiral coil;
- and
- an Edison base located at the bottom of the lamp for connecting the high frequency power supply unit to external main power supply lines.
Dependencies are inferred from the claim text.