Lutron Electronics Company, Inc.

Gte Products Corporation

Gte Sylvania Incorporated

John F. Waymouth Intellectual Property and Education Trust

Matsushita Electric Works R&d Lab

Matsushita Electric Works, Ltd.

Fusion Lighting, Inc.

John F. Waymouth Intellectual Property and Educational Trust

John Francis Waymouth

Mark Stephen Taipale

Russell Lawrence MacAdam

Robert Thomas Nachtrieb

Renzo Corrado DeMeo

Farheen Khan

Mark Alan Hartfield

Andre C Bouchard

Jakob Maya

Harold H Hall, Jr

Richard A Fowler

Timothy Kelly

Michael G Ury

Charles H Wood

William M Keeffe

Michael J Shea

Gregory Zaslavsky

James T Dolan

James C Morris

Robert P Bonazoli

Robert J Karlotski

Thomas J Sentementes

Dennis B Shinn

Edmund M Passmore

Martin E Muzeroll

P Bruce Newell

Stefaan Maria Lambrechts

George L Duggan

Gordon P Chu

Naila Saba Jirmanus

Apparatus and methods for measuring cathode fall in fluorescent lamps are disclosed. Together with measurements of cathode temperature, such measurements of cathode fall may inform a determination of cathode heater voltage as a function of discharge current (i.e., a cathode-heating-profile) that avoids both sputtering and excess-evaporation.

Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps

Apparatus and methods are disclosed for measuring cathode fall within a fluorescent lamp that contains an electrode and a gas. A level of cathode fall associated with the electrode may be identified based on an intensity and wavelength of radiation emitted by the gas.

Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps

A metal halide lamp having excess amount of red radiation, well beyond a tungsten halogen lamp of the same color temperature. The deep saturated red being accomplished with reasonable efficacy utilizing a mixture of sodium and rare earth halides, additional broadening of the Na &ldquo;D&rdquo; lines and filtering out the yellow radiation at about 590 nm. The red radiation is comparable to the commercially available white high pressure sodium lamp red radiation.

Metal halide lamp with enhanced red emission, in excess of a blackbody

EMI suppression in electrodeless discharge lamps by inward RF-reflectance from the enclosure walls (12) of 90%+ and use of an absorber (16) of RF power having an absorption coefficient greater than 40%, a transmission coefficient less than e.sup.-3, and an effective area facing the interior of the enclosure between 5% and 40% of the area of the RF-reflective light transmissive enclosure.

Means for suppressing electromagnetic interference from RF-excited light

A lamp for emitting in the visible portion of the spectrum, which utilizes a fill which includes a selenium and/or a sulfur containing substance. The lamp has superior performance characteristics. Special electrode structures are provided which enhance longevity.

Lamp with electrodes for increased longevity

A narrow band light source is combined with a narrow band filter on the face of a traffic light to reduce the problem of sun glare reflected from one traffic light, reducing intensity of the sunlight glare while light from the narrow band source passes through the filter essentially unattenuated, allowing system efficiency to remain high.

Display lighting with matched narrow band filter and light source

A glowbottle starter switch for igniting gaseous discharge lamps in alternating current circuits. The glowbottle including a hermetically sealed glass envelope (7) containing a fill of an ionizable gas and having at least two lead wires (2,3) disposed therein and extending to the exterior of the envelope (7) and a bimetal switch (4) disposed on at least one of the lead wires (3). The switch (4) is arranged to move within a gap to contact the other of the lead wires (2). An electroluminescent light emitter including an electroluminescent phosphor (6 in FIG. 1) is disposed in optically-contiguous relationship with the glowbottle. The electroluminescent light emitter is arranged to be energized to emit light by electric fields produced by alternating voltage between the lead wires (2,3). Light emission causes a photoelectric emission of electrons from interior surfaces within the glowbottle envelope (7) to serve as initial electrons for electron avalanches promoting the ionization and breakdown of the gasses within the gap between electrodes (4, 2) of the glowbottle.

Glowbottle starting device for gaseous discharge devices

The EL device includes a first electrode which is a transparent electrically conducting layer, a dielectric layer overlying the first electrode and a plurality of electroluminescent block members disposed in spaced relationship on the dielectric layer, each EL block member having a first surface disposed in contact with the dielectric layer and a distal second surface. A second or counter electrode which is formed of an electrically conductive layer is positioned in spaced relationship to the distal second surfaces of the electroluminescent block members. The dimensions of the electroluminescent block provide for preselected sonic isolation so as to provide for reduction of phonon waves of varying energies and increase the output brightness of the device.

Electroluminescent device

An optical light source device includes a source member providing the emission of electromagnetic radiation wavelengths in the optical region of the spectrum, and at least one cavity waveguide member coupled with the electromagnetic radiation source member having a predetermined lateral dimension. The cavity waveguide member and predetermined dimension restrict the emission of electromagnetic radiation in the long wavelength non-visible infra-red range. In a preferred embodiment, the optical light source is formed with an array of optical light source members and associated cavity waveguide members.

Optical light source device

Growing community of inventors

Marblehead, MA, United States of America

John Francis Waymouth