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US 8,299,710 B2Granted
Method and apparatus to reduce arcing in electrodeless lamps
AssigneeLuxim Corporation
InventorsAbdeslam Hafidi, Sandeep Mudunuri
Life of this patent
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Abstract
A lamp and methods of forming are shown. In one example, a dielectric layer is formed over a gap between conductors in a plasma lamp. Electric arcing is reduced or eliminated, thus allowing tighter gaps and/or higher voltages. In one example a glass frit method is used to apply the dielectric layer. A lamp is shown with a barrier layer that prevents tarnish such as tarnish from sulfur exposure. The barrier layer reduces or prevents degradation of the lamp due to conversion of a conductor material to non-conductive tarnish material.
Claims22
An electrodeless plasma lamp comprising:
- a lamp body comprising a dielectric material, the lamp body having an outer conductor forming a resonant structure;
- a radio RF power source configured to provide RF power to the resonant structure;
- a bulb adjacent to the lamp body, the bulb containing a fill that forms a plasma when the RF power is coupled to the fill from the lamp body;
- at least one inner conductor having an end proximate the bulb, the end being spaced from the outer conductor to provide a gap in the conductive coating;
- and
- a dielectric coating over at least the end of the inner conductor to inhibit arcing at the end, the dielectric coating having a higher breakdown voltage than air.
3 more elements
Dependencies are inferred from the claim text.