Light emitting plasma lighting apparatus having rf shielding baffles
OwnerGerald W. Rea, Robert A. Drakeinventors
Life of this patent
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Abstract
A light emitting plasma lighting apparatus includes at least one conductive RF shielding baffle located in a reflector housing between an emitter and a window. The at least one RF shielding baffle includes a planar body portion aligned generally perpendicular to an outer surface of the plasma bulb to minimize interference with light emitted from the plasma bulb. The at least one RF shielding baffle is grounded to absorb a portion of an RF field emitted by the emitter.
Claims34
A light emitting plasma lighting apparatus driven by a driver which generates a radio frequency (RF) output signal, the apparatus comprising:
- a reflector housing having first and second openings;
- an emitter including a body portion coupled to the first opening of the reflector housing, the body portion of the emitter having an opening therein, the emitter also including a puck located in the opening of the body portion, the puck having an exposed bottom surface and a plasma bulb coupled to the bottom surface of the puck, the puck being coupled to the driver to receive the RF output signal and provide a concentrated RF field so that light is emitted from an outer surface of the plasma bulb and an RF field is emitted from the bottom surface of the puck;
- a reflector located in the reflector housing to direct light emitted from the plasma bulb through the second opening;
- a window positioned over the second opening of the reflector housing spaced apart from the plasma bulb so that light emitted from the plasma bulb passes through the window;
- and
- at least one conductive RF shielding baffle located in the reflector housing between the emitter and the window, the at least one RF shielding baffle including a planar body portion aligned generally perpendicular to the outer surface of the plasma bulb to minimize interference with light emitted from the plasma bulb, and the at least on RF shielding baffle being grounded to absorb a portion of the RF field emitted by puck.
A light emitting plasma emitter apparatus comprising:
- a metal body portion defining an opening therein;
- a puck located in the opening of the body portion, the puck having an exposed bottom surface and a plasma bulb coupled to the bottom surface of the puck, the puck being configured to provide a concentrated RF field from a RF signal received from a driver so that light is emitted from an outer surface of the plasma bulb and an RF field is emitted from the bottom surface of the puck;
- and
- at least one conductive RF shielding baffle coupled to the body portion over the bottom surface of the puck, the RF shielding baffle including a planar body portion aligned generally perpendicular to the outer surface of the plasma bulb, and wherein the RF shielding baffle is grounded to absorb a portion of the RF field emitted from the bottom surface of the puck.
A light emitting plasma lighting apparatus driven by a driver which generates a radio frequency (RF) output signal, the apparatus comprising:
- a reflector housing having first and second openings;
- an emitter coupled to the first opening of the reflector housing, the emitter including a puck having a bottom surface and a plasma bulb coupled to the bottom surface of the puck, the puck being coupled to the driver to receive the RF output signal so that light emitted from an outer surface of the plasma bulb and an RF field is emitted from the puck;
- a reflector located in the reflector housing to direct light emitted by the plasma bulb through the second opening;
- a window positioned over the second opening of the reflector housing spaced apart from the plasma bulb so that light emitted by the plasma bulb passes through the window;
- and
- at least one conductive portion covering at least one selected portion of the window, the at least one selected portion having a combined area less than an overall area of the window, the at least one conductive portion being grounded to absorb portions of the RF field emitted by the puck.
Dependencies are inferred from the claim text.