General Electric Company

Fiberstars, Inc.

Energy Focus, Inc.

Optical Research Associates

Federal Signal Corporation

Other

Ford Motor Company Limited

Advanced Lighting Technologies, Inc.

John M Davenport

Richard L Hansler

William J Cassarly

Roger F Buelow, Ii

Gary Robert Allen

Gregory P Frankiewicz

Chris H Jenson

Frederic F Ahlgren

William W Finch

Juris Sulcs

Joseph M Allison

Kenneth S King

Thomas L R Davenport

Thomas G Parham

Rolf S Bergman

Robert A Leskovec

John L Henkes

Elmer G Fridrich

John J Karikas

Dave Bina

Richard C Nagle

Mark E Duffy

Laszlo A Takacs

Rocco T Giordano

Timothy P Dever

Pieter J Von Herrmann

Raymond A Buchina

Alan J Ruud

Eric J Haugaard

Roger F Buelow

Park French

Frederick W Dynys

Thomas M Golz

David Nicolay

Attila Tomasovics

Gerald E Duffy

Robert H Caywood

David Y Lin

Jeremiah A Heilman

Carl V Gunter

Timothy J Mazies

John W Munk, Jr

Zhang Liang

Joseph G Kaveski

Conrad E Bechard

Greg Flies

Alok Mani Srivastava

Anil Raj Duggal

William Winder Beers

Mahendra Somasara Dassanayake

Lionel M Levinson

Thomas Frederick Soules

William Peil

James T Dakin

Jeffrey Allen Erion

Robert J McFadyen

Walter J Kosmatka

Edward John Thomas

Paul G Mathews

Jeffrey D Johnson

Laurence Bigio

Blair L Unger

Robert J Crosby

Martin N Hassink

Jacek J Jozwik

Leonard E Hoegler

Milan R Vukcevich

John X Li

Ralph M Potter

Denis A Lynch

Dennis J Hilburger

Dimitri M Speros

Ivan Berlec

Brian John Doucet

Gregory A Sink

Walter R Chapman, Jr

Amarendra Mishra

Jerry L Williams

Robert L Bateman, Jr

Kent Allen Kekeis

David Bina

Kenneth A Roll

Joseph Feldman

Carmen P Germano

Keith D Kazenski

Jean-Pierre Vanderreydt

Walter K Brinn

Alistair Allen Miller

William H Herrmann

Steven N Lovrekovic

Robert H Springer

Maw H Lee

Wayne R Hellman

Lee E Barnes, Jr

James D Mieskowski

Stuart C Miller

Ray A Buchina

Willie J Cheney

L Abigail Ainsworth

Craig D Raleigh

A system and method for providing high power factor wired lamp control that include receiving a lighting control input though a switch that is associated with at least one of: an operation and a function of at least one lamp. The system and method also include determining if an environment of the at least one lamp includes a connection between a neutral wire and the switch. The system and method additionally include communicating at least one electronic data command associated with the lighting control input to the at least one lamp through an AC power cycle. The system and method further include controlling the at least one lamp to operate based on the lighting control input based on the receipt of the at least one electronic data command communicated through the AC power cycle.

System and method for providing high power factor wired lamp control

A system and method for providing high power factor wired lamp control that include receiving a lighting control input though a switch that is associated with at least one of: an operation and a function of at least one lamp. The system and method also include processing a digital data packet that includes at least one electronic data command associated with the lighting control input. The system and method additionally include implementing at least one powerline interruption associated with an AC power cycle to communicate the digital data packet to the at least one lamp. The system and method further include controlling the at least one lamp to operate based on the lighting control input based on the receipt of the digital data packet communicated through the AC power cycle.

A circuit for mitigating electric shock including an external impedance detection circuit and a test and holdoff circuit. The external impedance detection circuit detects a presence of an external impedance, such as by detecting a relative change in voltage from a startup condition and a test condition. The test and holdoff circuit inhibits operation of a power converter which delivers power to be consumed by a load. The startup condition is defined by mains power applied to the circuit with negligible power consumed by a load. The test condition is defined by non-zero power delivered to the load. According to another aspect, the external impedance detection circuit measures an input voltage using a high input power which is greater than a shock hazard threshold at a duration less than a threshold time duration and determines the presence of the external impedance based on low pass filters having different time constants.

Circuit for mitigating electric shock

An LED lamp has dual modes of operation from fluorescent lamp fixtures. A first circuit powers at least one LED in a first mode of operation when first and second power pins at a first end of the lamp are inserted into power contacts of the fixture that are directly connected to power mains. A second circuit powers at least one LED in a second mode of operation when the second power pin at the first end of the lamp and a third power pin at a second end of the lamp are inserted into power contacts of a fixture powered from an electronic ballast. First and second conduction control means permit the second circuit to power at least one LED during the second mode of operation.

LED lamp with dual mode operation

An elongated LED lamp suitable for replacing a fluorescent lamp in a lamp fixture comprises a chassis having a first chassis end with two electrodes adapted to be respectively coupled to two electrodes in the lamp fixture supplying AC power, and a second chassis end. A light source depends from the chassis. A power regulating circuit is mounted to the chassis and is coupled to the two electrodes for providing DC power to the first light source. A first light collector conditions the light it collects light from the first light source for TIR propagation within a side-light distribution arrangement. An elongated side-light distribution portion depends from the chassis and receives light exiting the first light collector. Light-extraction structure extract light from the side of the first portion, along a length of the first portion, in a different direction from the direction of light received from the first light collector.

Elongated LED lamp for replacing a fluorescent lamp

An elongated LED lighting arrangement comprises an elongated fiberoptic light pipe having an exteriorly facing sidewall between its ends. The light pipe is constructed to promote TIR of light between the ends. A first LED light source is tuned to efficiently provide light within a wavelength range to the pipe. Light-extracting means are applied along the light pipe along the main path of TIR light propagation, and comprise down-converting means tuned to efficiently convert light rays from the LED light source within the wavelength range to lower-energy light rays at respectively longer wavelengths and light-scattering means for extracting from the pipe some light rays within the wavelength range without changing the wavelengths of the foregoing light. The light emitted by the down-converting means and the light-scattering means intermix to produce light, the majority of which has a composite color determined by the foregoing light emitted and the foregoing light extracted.

Elongated LED lighting arrangement

Lighted refrigerated display case with remote light source comprises a closed container with an interior of the container refrigerated to a temperature below 7 C. The container is thermally insulated from ambient, having internal and external walls. A solid fiber optic luminaire is at least partially mounted within the container, having an elongated side-light emitting portion for emitting light from the side of the luminaire onto contents in an interior of the display case. The side-light emitting portion comprises an extractor of light arranged to preferentially extract light from the luminaire and direct the light in at least one radial direction along the length of the side-light emitting portion to at least one target area of said contents along a longitudinal axis of the side-light emitting portion. A light-delivery system provides light to the fiber optic luminaire, having a light source mounted remotely from the interior of the container.

Elongated solid luminaire with light-emitting portion with first and second extraction regions spatially divided along the longitudinal axis thereof

Lighted refrigerated display case with remote light source

Luminaire with directional side-light extraction comprises a light pipe with a light-carrying core, and with a light-extraction structure along a first longitudinal side of the luminaire, confined to a radial swath of the luminaire, along the longitudinal axis of the luminaire, of substantially less than 180&#xb0;. The second end of the light pipe has light-saving means for directing saved light from the second end towards the first end. The light-extraction means is adjustable to accommodate angular distributions of light from various light sources.

Efficient luminaire with directional side-light extraction

A luminaire with improved lateral illuminance control comprising a light pipe with a longitudinal center is disclosed. A light-extraction means applied to a radial swath of the light pipe has a longitudinal portion having dimension along its length, centered about a slice on the light pipe longitudinally; said slice being orthogonal to the longitudinal center and located in a propagation plane through which light propagates to a virtual target area intersecting the propagation plane. The light pipe intervenes between the radial swath and the target area. A first average efficiency point of the light-extraction means corresponds to the minimum distance to the target area being at least approximately 20% less than a respective, second average efficiency point corresponding to a respective maximum distance to such area. The light-extraction means efficiency varies from the first average efficiency point to the second average efficiency point though more than one non-zero value.

Luminaire with improved lateral illuminance control

Fiberoptic luminaire with scattering and specular side-light extractor patterns comprises a fiberoptic light pipe with elongated side-fight emitting portion. Such portion illuminates a target area with a scattering, and a specular, light extractor pattern. The extractor patterns are arranged to extract light from the side-light emitting portion over a radial angle, orthogonal to said main axis, of less than 180&#xb0;. The scattering extractor pattern atone may provide greater than 50% of light on the target area, and light extracted by the specular extractor pattern alone may produce an illuminance on a selected portion of the target area that is greater than 5% of the maximum illuminance produced on the target area by the scattering extractor pattern. Furthermore, the scattering extractor pattern may comprise a Lambertian type of extractor pattern. Each specular extractor pattern may comprise a notch having main faces parallel to within 10&#xb0; of each other.

Fiberoptic luminaire with scattering and specular side-light extractor patterns

An illumination system for a video-imaging device has a light source and a collector of light from the light source. The collector is formed according to the principles of non-imaging optics and receives a portion of the light from the light source. The collector is configured to reduce the angular distribution of the collected light from the light source to match the requirements of a digital pixelation device.

Compact, high-efficiency illumination system for video-imaging devices

An adjustable-aim light pipe fixture, comprising a generally spherical eyeball for receiving an end of a light pipe is disclosed. The eyeball has a longitudinal axis coincident with a longitudinal axis of that portion of the light pipe that is received in the eyeball. A socket holds the eyeball. The socket comprises a first retainer ring and a second retainer ring. Each retainer ring has an interior surface with contact points to an outer surface of the eyeball. The first and second retainer rings are oriented with respect to each other so as to hold the eyeball in a fixed position when the first and second rings are pressed towards each other. Clamping structure clamps the first and second rings against each other in such manner as to hold the eyeball in fixed relation to the first retainer ring.

Adjustable-aim light pipe fixture

A light pipe with uniform side-light emission has a core comprising a polymer, and a fluoropolymer cladding on the core with a lower refractive index than the core. Light-scattering material is distributed within the core along an active section of light pipe in which side-light emission is desired, with a density gradient chosen to achieve uniform side-light emission. Another light pipe with uniform side-light emission has a core comprising a polymer, and a fluoropolymer cladding on the core with a lower refractive index than the core. Light-scattering material is distributed within at least one of the cladding and the core along an active section of light pipe in which side-light emission is desired, with a density gradient chosen to yield uniform side light emission, and substantially only in a radial swath, along the longitudinal axis of the light pipe, of substantially less than 360 degrees.

Light pipe with side-light extraction

A solid light pipe arrangement with reduced Fresnel-reflection losses includes a light pipe with a solid core comprising a polymer. An optically clear substrate has first and second sides with an anti-reflective coating on at least one side. The substrate is adhered to an end-face of the core of the light pipe by adhesive material so as to create an optically clear interface between the substrate and the end-face that passes more than about 96 percent of transmitted light. A preferred method of applying an anti-reflective coating to an end-face of a core of a solid, polymeric light pipe comprises diverting uncrosslinked polymer used for forming a light pipe core, and using the diverted polymer as adhesive material between a substrate with at least one antireflective coating and the end-face of a light pipe having the same polymeric components, in the same proportions, as the diverted polymer.

Light-pipe arrangement with reduced fresnel-reflection losses

Growing community of inventors

Lyndhurst, OH, United States of America

John M Davenport