Back to results
US 6,737,809 B2Granted
Plasma lamp with dielectric waveguide
AssigneeLuxim Corporation
InventorsFrederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
Life of this patent
Estimating the term…
Abstract
A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in a cavity within the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.
Claims35
A lamp comprising:
- (a) a waveguide having a body comprising a ceramic dielectric material of a preselected shape and preselected dimensions, the body having a first side determined by a fist waveguide outer surface;
- (b) a first microwave feed positioned within and in intimate contact with the waveguide body, adapted to couple microwave energy into the body from a microwave source having an output and an input and operating within a frequency range from about 0.5 to about 30 GHz at a preselected frequency and intensity, the feed connected to the source output, said frequency and intensity and said body shape and dimensions selected such that the body resonates in at least one resonant mode having at least one electric field maximum;
- (c) an enclosed first cavity depending from said first surface into the waveguide body;
- and
- (d) a first bulb positioned in the cavity at a location corresponding to an electric field maximum during operation, the bulb containing a gas-fill which when receiving microwave energy from the resonating waveguide body forms a light-emitting plasma.
2 more elements
A method for producing light comprising the steps of:
- (a) coupling microwave energy characterized by a frequency and intensity into a waveguide having a body comprising a ceramic dielectric material of a preselected shape and preselected dimensions, the body having a side determined by an outer waveguide surface and a cavity depending from said surface into the body, said frequency and intensity and said body shape and dimensions selected such that the body resonates in at least one resonant mode having at least one electric field maximum;
- (b) directing resonant microwave energy into an envelope determined by the cavity and a window, the envelope containing a gas-fill;
- and
- (c) creating a plasma by interacting the resonant energy with the gas-fill, thereby causing emission of light.
1 more element
Dependencies are inferred from the claim text.