Plasma lamp with dielectric waveguide integrated with transparent bulb
First Claim
1. A plasma lamp comprising:
- a power source configured to provide radio frequency (RF) power;
a lamp body comprising a dielectric material wherein a conductive material surrounds the dielectric material and the power is provided at a resonant frequency for the lamp body;
a feed to couple the RF power into the lamp body;
a bulb including a fill that forms a light-emitting plasma when at least a portion of the RF power is coupled from the lamp body to the bulb; and
a reflective surface spaced from the bulb and shaped to reflect light emitted by the bulb out of the plasma lamp.
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Accused Products
Abstract
A dielectric waveguide integrated plasma lamp (DWIPL) with a body comprising 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 dielectric bulb within a lamp chamber in the body contains a fill which when receiving energy from the resonating body forms a light-emitting plasma. The bulb is transparent to visible light and infrared radiation emitted by the plasma. Radiative energy lost from the plasma is recycled by reflecting the radiation from thin-film, multi-layer coatings on bulb exterior surfaces and/or lamp chamber surfaces back into the bulb. The lamp further includes two- or three-microwave probe configurations minimizing power reflected from the body back to the microwave source when the source operates: (a) at a frequency such that the body resonates in a single mode; or (b) at one frequency such that the body resonates in a relatively higher mode before a plasma is formed, and at another frequency such that the body resonates in a relatively lower order mode after the plasma reaches steady state.
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Citations
17 Claims
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1. A plasma lamp comprising:
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a power source configured to provide radio frequency (RF) power; a lamp body comprising a dielectric material wherein a conductive material surrounds the dielectric material and the power is provided at a resonant frequency for the lamp body; a feed to couple the RF power into the lamp body; a bulb including a fill that forms a light-emitting plasma when at least a portion of the RF power is coupled from the lamp body to the bulb; and a reflective surface spaced from the bulb and shaped to reflect light emitted by the bulb out of the plasma lamp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification