Yian Chang

US Patent:

6737809, May 18, 2004

Filed:

Mar 15, 2001

Appl. No.:

09/809718

Inventors:

Frederick M. Espiau - Topanga CA
Chandrashekhar J. Joshi - Santa Monica CA
Yian Chang - Los Angeles CA

Assignee:

Luxim Corporation - Venice CA

International Classification:

H05B 3700

US Classification:

315 39, 315248, 313634, 313636

Abstract:

A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in a cavity within the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.

US Patent:

6922021, Jul 26, 2005

Filed:

Jan 31, 2003

Appl. No.:

10/356340

Inventors:

Frederick M. Espiau - Topanga CA, US
Yian Chang - Los Angeles CA, US

Assignee:

Luxim Corporation - Sunnyvale CA

International Classification:

H01J007/24
H05B041/24

US Classification:

315248, 31511141

Abstract:

A plasma lamp including a waveguide body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2. The body is coupled to a microwave power source which causes the body to resonate in at least one resonant mode. At least one lamp chamber integrated with the body contains a bulb with a fill forming a light-emitting plasma when the chamber receives power from the resonating body. A bulb either is self-enclosed or an envelope sealed by a window or lens covering the chamber aperture. Embodiments disclosed include lamps having a drive probe and a feedback probe, and lamps having a drive probe, feedback probe and start probe, which minimize power reflected from the body back to the source when the source operates: (a) at a frequency such that the body resonates in a single mode; or (b) at one frequency such that the body resonates in a relatively higher order mode before a plasma is formed, and at another frequency such that the body resonates in a relatively lower order mode after it reaches steady state.

US Patent:

7348732, Mar 25, 2008

Filed:

Feb 4, 2004

Appl. No.:

10/771788

Inventors:

Frederick M. Espiau - Topanga CA, US
Chandrashekhar J. Joshi - Santa Monica CA, US
Yian Chang - Los Angeles CA, US

Assignee:

Luxim Corporation - Sunnyvale CA

International Classification:

H05B 37/00

US Classification:

315 39, 315248, 313634, 313636

Abstract:

A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in at least one lamp chamber in the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.

US Patent:

7358678, Apr 15, 2008

Filed:

Mar 18, 2005

Appl. No.:

11/084069

Inventors:

Frederick M. Espiau - Topanga CA, US
Chandrashekhar J. Joshi - Santa Monica CA, US
Yian Chang - Los Angeles CA, US

Assignee:

Luxim Corporation - Sunnyvale CA

International Classification:

H05B 37/00

US Classification:

315 39, 315248, 313634, 313636

Abstract:

A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.

US Patent:

7372209, May 13, 2008

Filed:

Dec 11, 2004

Appl. No.:

11/010093

Inventors:

Frederick M. Espiau - Topanga CA, US
Yian Chang - Los Angeles CA, US

Assignee:

Luxim Corporation - Sunnyvale CA

International Classification:

H01J 7/46

US Classification:

315 39, 315248

Abstract:

A plasma lamp including a waveguide body including at least one dielectric material with a dielectric constant greater than approximately. The body is coupled to a microwave source which causes the body to resonate in at least one resonant mode. At least one lamp chamber integrated with the body contains a bulb with a fill forming a light-emitting plasma when the chamber receives power from the resonating body. A bulb either is self-enclosed or an envelope sealed by a window or lens covering the chamber aperture. Embodiments disclosed include lamps having a drive probe and a feedback probe, and lamps having a drive probe, feedback probe and start probe, which minimize power reflected from the body back to the source both before each plasma is formed and after it reaches steady state.

US Patent:

7391158, Jun 24, 2008

Filed:

Mar 18, 2005

Appl. No.:

11/083552

Inventors:

Frederick M. Espiau - Topanga CA, US
Chandrashekhar J. Joshi - Santa Monica CA, US
Yian Chang - Los Angeles CA, US

Assignee:

Luxim Corporation - Sunnyvale CA

International Classification:

H05B 37/00

US Classification:

315 39, 315248, 313634, 313636

Abstract:

A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in at least one lamp chamber in the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.

US Patent:

7429818, Sep 30, 2008

Filed:

Sep 23, 2004

Appl. No.:

10/947800

Inventors:

Yian Chang - Hacienda Heights CA, US
Frederick M. Espiau - Topanga CA, US

Assignee:

Luxim Corporation - Sunnyvale CA

International Classification:

H01J 17/26

US Classification:

31323131, 31323101, 31323141, 31323151

Abstract:

A dielectric waveguide integrated plasma lamp (DWIPL) with a body comprising at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A dielectric bulb within a lamp chamber in the body contains a fill which when receiving energy from the resonating body forms a light-emitting plasma. The bulb is transparent to visible light and infrared radiation emitted by the plasma. Radiative energy lost from the plasma is recycled by reflecting the radiation from thin-film, multi-layer coatings on bulb exterior surfaces and/or lamp chamber surfaces back into the bulb. The lamp further includes two- or three-microwave probe configurations minimizing power reflected from the body back to the microwave source when the source operates: (a) at a frequency such that the body resonates in a single mode; or (b) at one frequency such that the body resonates in a relatively higher mode before a plasma is formed, and at another frequency such that the body resonates in a relatively lower order mode after the plasma reaches steady state.

US Patent:

7498747, Mar 3, 2009

Filed:

Mar 18, 2005

Appl. No.:

11/083558

Inventors:

Frederick M. Espiau - Topanga CA, US
Chandrashekhar J. Joshi - Santa Monica CA, US
Yian Chang - Los Angeles CA, US

Assignee:

Luxim Corporation - Sunnyvale CA

International Classification:

H05B 37/00

US Classification:

315 39, 315248, 313634, 313636

Abstract:

A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.