Low frequency electrodeless plasma lamp

Abstract

In various exemplary embodiments, an electrodeless plasma lamp includes a bulb configured to be coupled to a source of radio frequency (RF) power. The bulb contains a fill that forms a plasma when the RF power is coupled to the fill. An electrically-conductive convex shield is positioned proximate to the bulb with a convex surface of the shield being distal to the bulb. A resonant structure having a quarter wave resonant mode includes a lamp body having a dielectric material having a relative permittivity greater than 2 with an inner conductor and an outer conductor. The source of RF power is configured to provide RF power to the lamp body at about a resonant frequency for the resonant structure.

Description

[0001] related application [0002] This application claims priority to U.S. Provisional Patent Applications Serial Nos. 61 / 142,844 and 61 / 238,467, both entitled "LOW FREEEQUENCY ELECTRODELESS PLASMA LAMP," filed January 6, 2009 and August 31, 2009, respectively interest, both applications are hereby incorporated by reference in their entirety. technical field [0003] The field relates to systems and methods for generating light, and more particularly to electrodeless plasma lamps. Background technique [0004] Electrodeless plasma lamps provide a point-like bright white light source. Because this type of plasma lamp does not use electrodes, electrodeless plasma lamps often have a longer lifetime than other lamps. In an electrodeless plasma lamp, radio frequency power may be coupled to the bulb interior fill to form a luminescent plasma. Contents of the invention [0005] In an example embodiment, an electrodeless plasma lamp is disclosed. The electrodeless plasma...

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