1
Michael D Pashley, Thomas M Marshall: LED luminaire with electronically adjusted color balance. Philips Electronics North America, F Brice Faller, October 3, 2000: US06127783 (298 worldwide citation)

A white light emitting luminaire includes a plurality of LEDs in each of the colors red, green, and blue with a separate power supply for each color and a photodiode arranged to measure the light output of all the LEDs. The light output of each color is measured by an electronic control circuit whic ...


2
Thomas M Marshall, Michael D Pashley, Stephen Herman: LED/phosphor-LED hybrid lighting systems. Koninklijke Philips Electronics, February 17, 2004: US06692136 (256 worldwide citation)

A hybrid lighting system for producing white light including at least one light emitting diode and phosphor-light emitting diode. The hybrid lighting system exhibits improved performance over conventional LED lighting systems that use LEDs or phosphor-LEDs to produce white light. In particular, the ...


3
Thomas M Marshall, Michael D Pashley, Stephen Herman: LED/phosphor-LED hybrid lighting systems. Koninklijke Philips Electronics, February 4, 2003: US06513949 (241 worldwide citation)

A hybrid lighting system for producing white light including at least one light emitting diode and phosphor-light emitting diode. The hybrid lighting system exhibits improved performance over conventional LED lighting systems that use LEDs or phosphor-LEDs to produce white light. In particular, the ...


4
Thomas M Marshall, Michael D Pashley: Led luminaire with electrically adjusted color balance. Koninklijke Philips Electronics, September 3, 2002: US06445139 (169 worldwide citation)

A luminaire comprises an array of LEDs that include at least one LED in each of a plurality of colors. Supplied to the LEDs for each color is an electrical current that, during a measuring period, comprises a measuring drive pulse having at least a first boost portion and a turn-off portion. The LED ...


5
Thomas M Marshall, Michael D Pashley, Frank J P Schuurmans: LED luminaire with light sensor configurations for optical feedback. Koninklijke Philips Electronics, May 25, 2004: US06741351 (115 worldwide citation)

White light emitting LED luminaire incorporates an array of red, green and blue emitting LEDs and a feedback arrangement to maintain a desired color balance. The feedback arrangement includes photodiodes positioned and enabled to separately measure the light output of each RGB color component. In on ...


6
Thomas M Marshall, Michael D Pashley, Stephen Herman: Low-profile luminaire having a reflector for mixing light from a multi-color linear array of LEDs. July 10, 2001: US06257737 (99 worldwide citation)

A linear array of LED light sources in a plurality of colors is situated along the length of a reflector which is positioned so that it receives substantially all the light within the semi-cone angles of the sources, and is shaped so that it is illuminated substantially uniformly along its width. Th ...


7
Thomas M Marshall, Gerard Harbers, Michael D Pashley, Stephen Herman: One-piece lens arrays for collimating and focusing light and led light generators using same. Koninklijke Philips Electronics, September 3, 2002: US06443594 (80 worldwide citation)

A lens array for a lamp directs light to a light conduit such as an optical fiber or light pipe for guiding light to a remote location. An array of LED serve as light sources. The lens array includes an integrally formed member having a number of collimator lenses positioned in the lens array so tha ...


8
Thomas M Marshall, Michael D Pashley, Stephen Herman, Jeffrey A Shimizu: Luminaire having a reflector for mixing light from a multi-color array of leds. Philips Electronics North America, F Brice Faller, March 13, 2001: US06200002 (79 worldwide citation)

A light source includes an array of LEDs in each of a plurality colors such as red, green, and blue in the entrance aperture of a tubular reflector which preferably has convex walls facing the optic axis and flares outward toward the exit aperture, and preferably has a polygonal cross section such a ...


9
Thomas M Marshall, Michael D Pashley, Matthijs H Keuper: Luminaire having beam splitters for mixing light from different color LEDs. LumiLeds Lighting, Philips Electronics North America, F Brice Faller, October 31, 2000: US06139166 (67 worldwide citation)

Apparatus for mixing light from discrete LED light sources utilizes beam splitters which each have a semi-reflective layer which partially transmits and partially reflects light of any wavelength incident thereon. Each semi-reflective layer is situated in a transparent prismatic black between reflec ...


10
Thomas M Marshall, Michael D Pashley, Stephen Herman, Gert W Bruning: LED array having an active shunt arrangement. Philips Electronics North America Corporation, Robert J Kraus, November 28, 2000: US06153980 (63 worldwide citation)

A device, e.g., a luminaire, that includes a plurality of LEDs connected in series, and an active shunt arrangement for sensing a failure of one or more of the LEDs and for shunting current that would have otherwise flowed through a failed LED, to thereby maintain a flow of current through remaining ...