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Title: High output lamp with high brightness

Abstract

An ultra bright, low wattage inductively coupled electrodeless aperture lamp is powered by a solid state RF source in the range of several tens to several hundreds of watts at various frequencies in the range of 400 to 900 MHz. Numerous novel lamp circuits and components are disclosed including a wedding ring shaped coil having one axial and one radial lead, a high accuracy capacitor stack, a high thermal conductivity aperture cup and various other aperture bulb configurations, a coaxial capacitor arrangement, and an integrated coil and capacitor assembly. Numerous novel RF circuits are also disclosed including a high power oscillator circuit with reduced complexity resonant pole configuration, parallel RF power FET transistors with soft gate switching, a continuously variable frequency tuning circuit, a six port directional coupler, an impedance switching RF source, and an RF source with controlled frequency-load characteristics. Numerous novel RF control methods are disclosed including controlled adjustment of the operating frequency to find a resonant frequency and reduce reflected RF power, controlled switching of an impedance switched lamp system, active power control and active gate bias control.

Inventors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [8];  [9]
  1. Great Falls, VA
  2. Mt. Airy, MD
  3. Germantown, MD
  4. Vancouver, CA
  5. Silver Spring, MD
  6. Gaithersburg, MD
  7. Frederick, MD
  8. Olney, MD
  9. Damascus, MD
Publication Date:
Research Org.:
FUSION LIGHTING INC
OSTI Identifier:
874615
Patent Number(s):
US 6424099
Assignee:
Fusion Lighting, Inc. (Rockville, MD)
DOE Contract Number:  
FC01-97EE23776
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
output; lamp; brightness; ultra; bright; wattage; inductively; coupled; electrodeless; aperture; powered; solid; rf; source; range; tens; hundreds; watts; frequencies; 400; 900; mhz; numerous; novel; circuits; components; disclosed; including; wedding; shaped; coil; axial; radial; lead; accuracy; capacitor; stack; thermal; conductivity; cup; bulb; configurations; coaxial; arrangement; integrated; assembly; power; oscillator; circuit; reduced; complexity; resonant; pole; configuration; parallel; fet; transistors; soft; gate; switching; continuously; variable; frequency; tuning; six; directional; coupler; impedance; controlled; frequency-load; characteristics; control; methods; adjustment; operating; reduce; reflected; switched; active; bias; thermal conductivity; power control; /315/

Citation Formats

Kirkpatrick, Douglas A, Bass, Gary K, Copsey, Jesse F, Garber, Jr., William E., Kwong, Vincent H, Levin, Izrail, MacLennan, Donald A, Roy, Robert J, Steiner, Paul E, Tsai, Peter, and Turner, Brian P. High output lamp with high brightness. United States: N. p., 2002. Web.
Kirkpatrick, Douglas A, Bass, Gary K, Copsey, Jesse F, Garber, Jr., William E., Kwong, Vincent H, Levin, Izrail, MacLennan, Donald A, Roy, Robert J, Steiner, Paul E, Tsai, Peter, & Turner, Brian P. High output lamp with high brightness. United States.
Kirkpatrick, Douglas A, Bass, Gary K, Copsey, Jesse F, Garber, Jr., William E., Kwong, Vincent H, Levin, Izrail, MacLennan, Donald A, Roy, Robert J, Steiner, Paul E, Tsai, Peter, and Turner, Brian P. Tue . "High output lamp with high brightness". United States. https://www.osti.gov/servlets/purl/874615.
@article{osti_874615,
title = {High output lamp with high brightness},
author = {Kirkpatrick, Douglas A and Bass, Gary K and Copsey, Jesse F and Garber, Jr., William E. and Kwong, Vincent H and Levin, Izrail and MacLennan, Donald A and Roy, Robert J and Steiner, Paul E and Tsai, Peter and Turner, Brian P},
abstractNote = {An ultra bright, low wattage inductively coupled electrodeless aperture lamp is powered by a solid state RF source in the range of several tens to several hundreds of watts at various frequencies in the range of 400 to 900 MHz. Numerous novel lamp circuits and components are disclosed including a wedding ring shaped coil having one axial and one radial lead, a high accuracy capacitor stack, a high thermal conductivity aperture cup and various other aperture bulb configurations, a coaxial capacitor arrangement, and an integrated coil and capacitor assembly. Numerous novel RF circuits are also disclosed including a high power oscillator circuit with reduced complexity resonant pole configuration, parallel RF power FET transistors with soft gate switching, a continuously variable frequency tuning circuit, a six port directional coupler, an impedance switching RF source, and an RF source with controlled frequency-load characteristics. Numerous novel RF control methods are disclosed including controlled adjustment of the operating frequency to find a resonant frequency and reduce reflected RF power, controlled switching of an impedance switched lamp system, active power control and active gate bias control.},
doi = {},
url = {https://www.osti.gov/biblio/874615}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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Works referenced in this record:

Electrodeless lamps for lighting: a review
journal, January 1993


A simple analysis of an inductive RF discharge
journal, August 1992


Electrical and Light Characteristics of RF-Inductive Fluorescent Lamps
journal, January 1994