US 9,754,777 B1Granted

Low-frequency compact air-cavity electrodeless high intensity discharge lamps

AssigneeSpl Industries USA, Inc.

InventorsMehran Matloubian, Timothy J. Brockett, Gregg A. Hollingsworth

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Abstract

Electrodeless high intensity discharge lamps have the promise of higher reliability and higher efficiency than traditional electroded high intensity discharge lamps. However most electrodeless HIDs operate in the frequency range of around 400 MHz to 2.5 GHz resulting in expensive, inefficient RF drivers that reduce the overall efficacy of the lamp. Operating the lamp at lower frequencies results in substantial increase in the size of the resonators used in traditional electrodeless HIDs. In this invention a novel design is used to lower the operating frequency of the resonator without increasing the size of the resonator. This provides an avenue to increase the conversion efficiency of the RF driver and the efficacy of the lamp system.

Claims22

Dependent claims

An electrodeless high intensity discharge lamp comprising:

an electrically conductive lamp module or housing having a spatial volume within the housing containing one or more apertures;
a bulb assembly, comprising of one or more sections of conductive and non-conductive materials and a gas-filled vessel (bulb) that has a combination of gas and metal halides contained within, attached to, and contained within the lamp module or housing;
an RF driver comprising of an RF source, amplifier, and supporting electronics;
an input coupling element;
and
an output coupling element electrically isolated from the lamp housing, the lamp housing being at ground potential;
and
an insulating material providing the electrical isolation between the output coupling element and the lamp housing;
and configured between the output coupling element and the lamp housing.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/270,265Filed 20 Sep 2016
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H01J 65/042
Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for…: by an…
H01J 61/302
Vessels; Containers: characterised by the material of the vessel
H01J 61/56
Details: one or more circuit elements structurally associated with the lamp
H01J 65/046
By an external electromagnetic field: the field being produced by using capacitive means around the vessel