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Subramanian Muthu, Chin Chang: LED luminaire with electrically adjusted color balance using photodetector. Koninklijke Philips Electronics, Aaron Waxler, December 17, 2002: US06495964 (343 worldwide citation)

The combined light output (chromaticity) of a white light emitting LED luminaire is electronically controlled based on measurements by a single photodiode arranged to measure the light outputs of at least a plurality of the LEDs in the array. This is accomplished by measuring the light output of the ...


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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 ...


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Aharon Z Hed: Luminaire. Aharon Z Hed, Herbert Dubno, April 5, 1994: US05301090 (233 worldwide citation)

A luminaire which has in its housing a multiplicity of groups of light emitters of different colors or pluralities of optical waveguides constructed to emit light progressively along the lengths thereof and a diffuser at which the colors can be mixed and from which the light emerges. The emitters ca ...


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James E Shaw: Compact LCD luminaire. Rockwell International Corporation, John C McFarren, M Lee Murrah, H Fredrick Hamann, November 27, 1990: US04974122 (200 worldwide citation)

A compact backlighting luminaire is provided for liquid crystal displays (LCDs). The body of the luminaire is formed of optically clear glass or acrylic resins. The body comprises a mesa extending from a base comprising a flange extending around the periphery of the mesa. The top of the mesa compris ...


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Katunobu Hamamoto, Shigeo Gotoh: Luminaire of variable color temperature for obtaining a blend color light of a desired color temperature from different emission-color light sources. Matsushita Electric Works, Kenyon & Kenyon, September 27, 1994: US05350977 (171 worldwide citation)

A luminaire of variable color temperature is arranged for emitting blended color light from luminaire section, with color temperature control signals so transmitted from control section to luminaire-lighting section as to substantially equalize respective differences in reciprocal color temperatures ...


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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 ...


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Roland Winston, Benjamin A Jacobson, Robert L Holman, Neil A Gitkind: Tapered multilayer luminaire devices. NiOptics Corporation, Reinhart Boerner Van Deuren Norris & Rieselbach, April 12, 1994: US05303322 (167 worldwide citation)

An optical device for collecting light and selectively outputting or concentrating the light. A wedge layer has an optical index of refraction n.sub.1, and top, bottom and side surfaces intersecting to define an angle of inclination d. A back surface spans the top, bottom and side surface. A first l ...


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Subramanian Muthu: Effective modeling of CIE xy coordinates for a plurality of LEDs for white LED light control. Koninklijke Philips Electronics, Aaron Waxler, June 25, 2002: US06411046 (155 worldwide citation)

The present invention describes a method and luminaire for driving an array of LEDs with at least one LED in each of a plurality of colors in a luminaire. This method controls the light output and color of the LEDs by measuring color coordinates for each LED light source for different temperatures, ...


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Gregory Randal Holder: Direct/indirect lighting fixtures. NSI Enterprises, Kenneth E Darnell, November 23, 1999: US05988829 (146 worldwide citation)

Direct/indirect lighting fixtures particularly intended for recessed applications of fluorescent lighting for small offices and similar use environments where balanced illumination for both vertical and horizontal surfaces is necessary. The lighting fixtures of the invention include general lighting ...