| Patent application number | Description | Published |
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| 20080315774 | OPTICAL INTEGRATING CAVITY LIGHTING SYSTEM USING MULTIPLE LED LIGHT SOURCES - A system to provide radiant energy of selectable spectral characteristic (e.g. a selectable color combination) uses an integrating cavity to combine energy of different wavelengths from different sources. The cavity has a diffusely reflective interior surface and an aperture for allowing emission of combined radiant energy. Sources of radiant energy of different wavelengths, typically different-color LEDs, supply radiant energy into the interior of the integrating cavity. In the examples, the points of entry of the energy into the cavity typically are located so that they are not directly visible through the aperture. The cavity effectively integrates the energy of different wavelengths, so that the combined radiant energy emitted through the aperture includes the radiant energy of the various wavelengths. The apparatus also includes a control circuit coupled to the sources for establishing output intensity of radiant energy of each of the sources. Control of the intensity of emission of the sources sets the amount of each wavelength of energy in the combined output and thus determines a spectral characteristic of the radiant energy output through the aperture. | 12-25-2008 |
| 20090194670 | INTELLIGENT SOLID STATE LIGHTING - 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. | 08-06-2009 |
| 20090295266 | SOLID STATE LIGHTING USING LIGHT TRANSMISSIVE SOLID IN OR FORMING OPTICAL INTEGRATING VOLUME - An exemplary general lighting fixture includes an assembly forming an optical integrating volume for receiving and optically integrating light from one or more solid state light emitters and for emitting integrated light. The assembly includes a reflector having a diffusely reflective interior surface defining a substantial portion of a perimeter of the integrating volume. A light transmissive solid fills at least a substantial portion of the optical integrating volume. A light emitter interface region of the solid, for each solid state light emitter, closely conforms to the light emitting region of the respective emitter. A surface of the transmissive solid conforms closely to and is in proximity with the interior surface of the reflector. The transmissive solid also provides a light emission surface, at least a portion of which forms a transmissive optical passage for emission of integrated light, from the volume, in a direction facilitating a general lighting application. | 12-03-2009 |
| 20100172122 | SOLID STATE LIGHTING USING NANOPHOSPHOR BEARING MATERIAL THAT IS COLOR-NEUTRAL WHEN NOT EXCITED BY A SOLID STATE SOURCE - An element for a solid state lighting device, such as a lamp or light fixture, includes one or more semiconductor nanophosphors dispersed in a light transmissive material in the element. The material is of a type and the nanophosphor(s) are dispersed therein in such a manner that the material bearing the semiconductor nanophosphor(s) is at least substantially color-neutral to the human observer, when the solid state lighting device is off. In some examples, the material appears relatively clear or transparent when the device is off. In other examples, the material appears translucent, e.g. white, when the device is off. When such an element is used to remotely deploy the nanophosphor, the nanophosphor is not readily perceptible to a person viewing the device when off. If a bubble is formed inside the container with a liquid type phosphor bearing material, the bubble may be configured to essentially disappear when the light transmissive liquid material reaches a nominal operating temperature. | 07-08-2010 |
| 20100201286 | OPTICAL INTEGRATING CAVITY LIGHTING SYSTEM USING MULTIPLE LED LIGHT SOURCES - A system to provide radiant energy of selectable spectral characteristic (e.g. a selectable color combination) uses an integrating cavity to combine energy of different wavelengths from different sources. The cavity has a diffusely reflective interior surface and an aperture for allowing emission of combined radiant energy. Sources of radiant energy of different wavelengths, typically different-color LEDs, supply radiant energy into the interior of the integrating cavity. In the examples, the points of entry of the energy into the cavity typically are located so that they are not directly visible through the aperture. The cavity effectively integrates the energy of different wavelengths, so that the combined radiant energy emitted through the aperture includes the radiant energy of the various wavelengths. The apparatus also includes a control circuit coupled to the sources for establishing output intensity of radiant energy of each of the sources. Control of the intensity of emission of the sources sets the amount of each wavelength of energy in the combined output and thus determines a spectral characteristic of the radiant energy output through the aperture. | 08-12-2010 |
| 20100213854 | INTELLIGENT SOLID STATE LIGHTING - 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. | 08-26-2010 |
| 20100231143 | OPTICAL INTEGRATING CAVITY LIGHTING SYSTEM USING MULTIPLE LED LIGHT SOURCES WITH A CONTROL CIRCUIT - A system to provide radiant energy of selectable spectral characteristic (e.g. a selectable color combination) uses an integrating cavity to combine energy of different wavelengths from different sources. The cavity has a diffusely reflective interior surface and an aperture for allowing emission of combined radiant energy. Sources of radiant energy of different wavelengths, typically different-color LEDs, supply radiant energy into the interior of the integrating cavity. In the examples, the points of entry of the energy into the cavity typically are located so that they are not directly visible through the aperture. The cavity effectively integrates the energy of different wavelengths, so that the combined radiant energy emitted through the aperture includes the radiant energy of the various wavelengths. The apparatus also includes a control circuit coupled to the sources for establishing output intensity of radiant energy of each of the sources. Control of the intensity of emission of the sources sets the amount of each wavelength of energy in the combined output and thus determines a spectral characteristic of the radiant energy output through the aperture. | 09-16-2010 |
| 20100259917 | LIGHT FIXTURE USING UV SOLID STATE DEVICE AND REMOTE SEMICONDUCTOR NANOPHOSPHORS TO PRODUCE WHITE LIGHT - For general lighting applications, a semiconductor chip produces near ultraviolet (UV) electromagnetic energy in a range of 380-420 nm, e.g. 405 nm. Semiconductor nanophosphors, typically doped semiconductor nanophosphors, are remotely positioned in an optic of a light fixture. Each phosphor is of a type or configuration that when excited by energy in the 380-420 nm range, emits light of a different spectral characteristic. The nanophosphors together produce light in the fixture output that is at least substantially white and has a color rendering index (CRI) of 75 or higher. In some examples, the fixture optic includes an optical integrating cavity. In the examples using doped semiconductor nanophosphors, the visible white light output exhibits a color temperature in one of the following ranges along the black body curve: 2,725±145° Kelvin; 3,045±175° Kelvin; 3,465±245° Kelvin; and 3,985±275° Kelvin. | 10-14-2010 |
| 20100259918 | SOLID STATE LIGHTING SYSTEM WITH OPTIC PROVIDING OCCLUDED REMOTE PHOSPHOR - The present teachings relate to semiconductor-based lighting systems and fixtures which process electromagnetic energy from light emitting diodes or the like. A disclosed exemplary system includes at least one occluded remote phosphor and produces substantially white light of desired characteristics. The remote phosphor extends over at least a portion of a surface of a macro optic at an occluded location such that none of the remote phosphor is directly visible through an optical aperture. The phosphor is responsive to electromagnetic energy from a semiconductor device to emit visible light for the emission through the optical aperture. | 10-14-2010 |
| 20100277059 | LIGHT FIXTURE USING DOPED SEMICONDUCTOR NANOPHOSPHOR IN A GAS - A light fixture, for example a white light fixture for a general lighting application, uses a solid state source and one or more semiconductor nanophosphors dispersed in a gas contained in the fixture. Exemplary sources use one or more LEDs rated for emission of a wavelength in the range of 460 nm and below. Nanophosphors used in the specific examples are doped semiconductor nanophosphors. The gas and semiconductor nanophosphor(s) are remotely deployed, for example, at a remote location in or around a macro optical element (optic) such as a window, a reflector, a diffuser, an optical integrating cavity, etc. of the light fixture. The gas with the doped semiconductor nanophosphor(s) dispersed therein may appear at least substantially clear when the solid state source is off. | 11-04-2010 |
| 20110127555 | SOLID STATE LIGHT EMITTER WITH PHOSPHORS DISPERSED IN A LIQUID OR GAS FOR PRODUCING HIGH CRI WHITE LIGHT - A solid state white light emitting device includes a semiconductor chip for producing electromagnetic energy and may additionally include a reflector forming an optical integrating cavity. Phosphors, such as semiconductor nanophosphors dispersed in a light transmissive liquid or gas material, within the chip packaging of the solid state device itself, are excitable by the energy from the chip. The device produces output light that is at least substantially white and has a color rendering index (CRI) of 75 or higher. The white light output of the device may exhibit color temperature in one of the following specific ranges along the black body curve: 2,725±145° Kelvin; 3,045±175° Kelvin; 3,465±245° Kelvin; 3,985±275° Kelvin; 4,503±243° Kelvin; 5,028±283° Kelvin; 5,665±355° Kelvin; and 6,530±510° Kelvin. | 06-02-2011 |
| 20110127557 | LIGHT FIXTURE USING NEAR UV SOLID STATE DEVICE AND REMOTE SEMICONDUCTOR NANOPHOSPHORS TO PRODUCE WHITE LIGHT - For general lighting applications, a semiconductor chip produces near ultraviolet (UV) electromagnetic energy in a range of 380-420 nm, e.g. 405 nm. Semiconductor nanophosphors, typically doped semiconductor nanophosphors, are remotely positioned in an optic of a light fixture. Each phosphor is of a type or configuration that when excited by energy in the 380-420 nm range, emits light of a different spectral characteristic. The nanophosphors together produce light in the fixture output that is at least substantially white and has a color rendering index (CRI) of 75 or higher. In some examples, the fixture optic includes an optical integrating cavity. In the examples using doped semiconductor nanophosphors, the visible white light output exhibits a color temperature in one of the following ranges along the black body curve: 2,725±145° Kelvin; 3,045±175° Kelvin; 3,465±245° Kelvin; and 3,985±275° Kelvin. | 06-02-2011 |
| 20110128718 | LIGHTING FIXTURES USING SOLID STATE DEVICE AND REMOTE PHOSPHORS TO PRODUCE WHITE LIGHT - The present subject matter utilizes solid state sources to pump remote phosphors positioned within lighting fixtures to facilitate visible light illumination application in a region or area to be inhabited by a person. One or more phosphors are remotely positioned in a chamber of a lightguide element, which in some examples, substantially fills an optical volume of the fixture. The chamber includes a solid liquid or gas material for bearing the one or more phosphors. Multiple phosphors, for example, may together produce light in the fixture output that is at least substantially white and has a color rendering index (CRI) of 75 or higher. | 06-02-2011 |
