Intelligent solid state lighting
First Claim
1. A lighting system, comprising:
- an optical integrating cavity having a reflective interior surface, at least a portion of which exhibits a diffuse reflectivity, and having an optical aperture for allowing emission of reflected light from within the interior of the optical integrating cavity into a region to facilitate a humanly perceptible lighting application for the system;
at least one solid state light emitting element for emitting visible light, each solid state light emitting element being coupled to supply visible light to enter the optical integrating cavity in such a manner that substantially all light emitted from each solid state light emitting element reflects diffusely at least once within the interior of the optical integrating cavity before emission through the optical aperture toward the region;
a detector for detecting electromagnetic energy from the region of a wavelength at least substantially absent from a spectrum of the reflected light; and
a controller for controlling an amount of visible light supplied to the cavity by the at least one solid state light emitting element, wherein the controller receives a detection signal from the detector.
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Accused Products
Abstract
A light fixture, using one or more solid state light emitting elements utilizes a diffusely reflect chamber to provide a virtual source of uniform output light, at an aperture or at a downstream optical processing element of the system. Systems disclosed herein also include a detector, which detects electromagnetic energy from the area intended to be illuminated by the system, of a wavelength absent from a spectrum of the combined light system output. A system controller is responsive to the signal from the detector. The controller typically may control one or more aspects of operation of the solid state light emitter(s), such as system ON-OFF state or system output intensity or color. Examples are also discussed that use the detection signal for other purposes, e.g. to capture data that may be carried on electromagnetic energy of the wavelength sensed by the detector.
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Citations
86 Claims
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1. A lighting system, comprising:
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an optical integrating cavity having a reflective interior surface, at least a portion of which exhibits a diffuse reflectivity, and having an optical aperture for allowing emission of reflected light from within the interior of the optical integrating cavity into a region to facilitate a humanly perceptible lighting application for the system;
at least one solid state light emitting element for emitting visible light, each solid state light emitting element being coupled to supply visible light to enter the optical integrating cavity in such a manner that substantially all light emitted from each solid state light emitting element reflects diffusely at least once within the interior of the optical integrating cavity before emission through the optical aperture toward the region;
a detector for detecting electromagnetic energy from the region of a wavelength at least substantially absent from a spectrum of the reflected light; and
a controller for controlling an amount of visible light supplied to the cavity by the at least one solid state light emitting element, wherein the controller receives a detection signal from the detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 52)
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42. A lighting system for humanly visible light illumination, comprising:
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a light fixture, comprising;
(a) a plurality of light emitting diodes (LEDs) for generating visible light;
(b) a chamber having a reflective interior surface, at least a portion of the interior surface having a diffuse reflectivity such that the chamber combines light by diffuse reflection within the chamber; and
(c) an optical aperture through which combined light is emitted from the chamber in a direction for lighting an area intended to be illuminated by the system;
the LEDs being coupled to supply the generated visible light to locations in the chamber and directed so that the visible light supplied from the LEDs is reflected one or more times off the reflective interior surface of the chamber before emission in the combined light through the optical aperture; and
(d) a detector for detecting electromagnetic energy of a wavelength at least substantially absent from a spectrum of the combined light from within the area intended to be illuminated by the emission of the combined light through the optical aperture; and
a controller coupled to the LEDs for turning the LEDs on and off to turn the lighting system on and off, and when the LEDs are turned on, for controlling an amount of visible light generated from each of the LEDs for inclusions in the combined light, wherein the controller is receives the detection signal from the detector. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74)
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75. A lighting system, comprising:
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an optical integrating chamber comprising a base, a mask separated from the base, and a cavity formed in at least one of the base and the mask, wherein;
opposing surfaces of the base and mask are reflective, at least one of the opposing reflective surfaces exhibits a diffuse reflectivity, and the mask is sized and positioned relative to the base so as to constructively occlude an active area of the base with respect to a region to be illuminated by reflected light emerging from the chamber between the base and mask;
at least one solid state light emitting element for emitting visible light, each solid state light emitting element being coupled to supply visible light to enter the optical integrating chamber in such a manner that substantially all light emitted from each solid state light emitting element reflects diffusely at least once within the interior of the optical integrating chamber before emission from the chamber toward the region;
a detector for detecting electromagnetic energy from the region of a wavelength at least substantially absent from a spectrum of the reflected light; and
a controller for controlling an amount of visible light supplied to the cavity by the at least one solid state light emitting element, wherein the controller receives a detection signal from the detector. - View Dependent Claims (76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86)
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Specification