Abstract:
A lighting fixture appears as a skylight and is referred to as a skylight fixture. The skylight fixture has a sky-resembling assembly and a plurality of sun-resembling assemblies. The sky-resembling assembly has a sky-resembling optical assembly and a sky-specific light source, wherein light from the sky-specific light source exits a planar interior surface of the sky-resembling light optical assembly as skylight light. The plurality of sun-resembling assemblies are arranged adjacent one another and extend downward from a periphery of the sky-resembling assembly. Each of the plurality of sun-resembling assemblies has a sun-resembling optical assembly and a sun-specific light source, wherein light from the sun-specific light source exits a planar interior surface of the sun-resembling optical assembly as sunlight light.
Abstract:
A lighting fixture including a light source, a housing, an image sensor, and a lens is disclosed. The housing is coupled to the light source and includes an opening through which light from the light source is emitted to fill an illumination area. The image sensor is configured to capture one or more images of the illumination area. The lens is over the image sensor, and provides the image sensor a field of view that substantially corresponds with the illumination area. By tailoring the lens such that it provides the image sensor a field of view that substantially corresponds with the illumination area, the image sensor can collect information relevant to the lighting fixture.
Abstract:
A lighting device including a blue solid state emitter, at least one yellow-green or green lumiphoric material, and at least one red or red-orange solid state emitter can simultaneously provide high color fidelity (e.g., high CRI Ra), high color saturation (e.g., high Qg), and high efficiency (e.g., lumens per watt). A subcombination of blue and yellow-green emissions is provided within one or more specified regions of a 1931 CIE chromaticity diagram. By providing sufficient green content, increased saturation can be active with relatively a short wavelength red or red-orange source while maintaining high color fidelity and efficacy. A mixture of green and yellow lumiphoric materials may be provided.
Abstract:
A multi-emitter solid state lighting device includes at least one narrow spectral output solid state light emitter, such as may be in the green range, having a full width-half maximum emission value of no greater than 30 nm. First, second, and third electrically solid state emitters may include dominant wavelengths in the ranges of 485-505 nm (or 491-505 nm), 526-545 nm, and 615-625 nm. Aggregate emissions of a solid state lighting device may comprise a scotopic/photopic (S/P) ratio value that exceeds threshold values for conventional white light-emitting devices including at least one phosphor-converted LED by at least 10%, 20%, 30%, or 40%, in combination with reasonably high gamut and brightness, over a range of desired CCT values.
Abstract:
A luminaire comprises at least one waveguide having a first region that emits a first luminous intensity pattern and a second region that emits a second luminous intensity pattern different from the first luminous intensity pattern. The luminaire further includes a plurality of LED elements and circuitry to control the plurality of LED elements to cause the luminaire to produce a selected one of a plurality of luminous intensity patterns.
Abstract:
Luminaires are described herein employing waveguides and associated architectures for dynamic alteration of illuminance distribution patterns. In one aspect, a luminaire described herein comprises a waveguide body and light sources having differing angular positions relative to the waveguide body for altering illuminance distribution patterns of the luminaire according to one or more activation patterns of the light sources. The differing angular positions can be located at the perimeter of the waveguide body and/or at one or more internal locations of the waveguide body.
Abstract:
A lighting fixture including a light source, a housing, an image sensor, and a lens is disclosed. The housing is coupled to the light source and includes an opening through which light from the light source is emitted to fill an illumination area. The image sensor is configured to capture one or more images of the illumination area. The lens is over the image sensor, and provides the image sensor a field of view that substantially corresponds with the illumination area. By tailoring the lens such that it provides the image sensor a field of view that substantially corresponds with the illumination area, the image sensor can collect information relevant to the lighting fixture.
Abstract:
Solid state light emitting devices and display devices include at least one filtering material arranged to provide at least one spectral notch comprising a wavelength of greatest attenuation in at least one spectrum between dominant wavelengths of solid state light emitters of the light emitting and/or display devices. The at least one spectral notch may be non-overlapping with a majority or an entirety of spectral output of each solid state light emitter. Filtering material may be arranged in a light path between at least some emitters and) at least one light output surface of a light emitting or display device, with the filtering material(s) arranged to receive incident ambient light, such that at least a portion of reflected ambient light exiting the device exhibits at least one spectral notch.
Abstract:
A lighting device including a blue solid state emitter, at least one yellow-green or green lumiphoric material, and at least one red or red-orange solid state emitter provides high color saturation, preferably in combination with a high R9-prime (modified R9) color rendering value, with such condition(s) being obtainable with at least one of (i) a red emitter peak wavelength of at least 630 nm, (ii) a green lumiphoric material having a narrow peak wavelength, and (iii) a blue shifted green color point within a specified region of a 1931 CIE chromaticity diagram, and obtainable without requiring a notch filtering material. Aggregate emissions may have a CCT in a range of from 2000K to 5000K.
Abstract:
Lighting devices with multiple light-emitting regions may be arranged to transmit or reflect emission portions or beams having different gamut properties, such as different gamut area index or relative gamut values. Different light transmitting surfaces or areas may be arranged to transmit emission portions or light beams having different gamut properties in different directions. Different gamut properties of different beams or emission portions may be produced by different electrically activated emitters and/or light-affecting materials such as notch filters, lumiphoric materials, and/or color pigments. A retrofit element may include a light-affecting (e.g., gamut-altering) material arranged to span across a portion of a light output surface or area of a lighting device and structure arranged for removable attachment to the lighting device.