A device includes a LED die having a peak emission at a blue or shorter wavelength, a LED die having a peak emission at a red, orange, yellow, green, or cyan wavelength, and a homogenous light conversion material positioned to receive light emitted from the LED dies. The light conversion material including: (i) a first phosphor compound having a peak emission at a green wavelength; (ii) a second phosphor compound having a peak emission at an orange wavelength; and (iii) a third phosphor compound having a peak emission at a red, orange, yellow, green, or cyan wavelength. The device is a packaged LED device and a relative concentration of the phosphor compounds and a relative luminosity of the LED dies are selected so the device emits white light satisfying a preference P1 and a fidelity F3 according to a TM-30 standard for color rendering.
H01L 25/075 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
F21S 4/28 - Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
A luminaire includes a light source (110), an optical system (111), and a luminous areal element (LAE) (150a, 150b). The optical system (111) is configured to receive light from the light source (110) and output the light into a first far-field light distribution (145). The optical system includes one or more optical elements arranged to direct light from an input aperture (118) of the optical system to an output aperture (132) of the optical system, and one or more output surfaces at the output aperture through which light is emitted. The surface has a first dimension T. The LAE (150a, 150b) is spaced from the output aperture (132), and is configured to output light according to a second far-field light distribution (155a, 155b). The LAE has a light emission surface through which light is emitted having a second dimension W greater than T. The first and the second light distributions at least in part overlap.
An illumination device includes multiple light-emitting elements operatively arranged to emit light during operation, and a transparent elongate optical element including one or more cavities. The optical element is arranged to receive light from the light-emitting elements. The one or more cavities are arranged along an extension of the optical element.
A luminaire (100) includes a base (102) supporting multiple light- emitting elements (LEEs) (122); and a first wall (150-i) and a second wall (150-o) each extending along a first direction (101). The first and second walls (150-i, 150-o) have light-reflective surfaces facing each other and forming a hollow channel (152). The light-reflective surfaces have first portions (120) that curve in opposite directions, second portions (130) that are parallel, and third portions (140) that curve in like directions. The first portions (120) are arranged facing the LEEs (110) to provide an input aperture (122) that receives light from the LEEs (110). The third portions (140) are arranged to provide an exit aperture (142) that outputs output light into an ambient environment. The first and second walls (150-i, 150-o) are configured to propagate light from the input aperture (122) to the exit aperture (142).
A light engine (100) configured to couple with a heat sink (105) having an aperture. The light engine (100) includes (i) one or more light-emitting elements (LEEs) (110); and (ii) a frame (140) thermally coupled with the one or more LEEs (110). The frame (110) has multiple contact elements (133, 135) arranged in an annular configuration and configured to resiliently engage an inside of the heat sink (105) when inserted in the aperture and conduct heat to the heat sink (105) from the LEEs (110) during operation.
F21S 8/02 - Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
F21V 19/00 - Fastening of light sources or lamp holders
F21V 29/71 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
F21V 29/73 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements being adjustable with respect to each other, e.g. hinged
F21Y 105/18 - Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
A lighting system includes a fixture including an optical system configured to output light for space illumination. The optical system has a first output aperture through which both (i) light with encoded downlink data is output, and (ii) light with encoded uplink data is received. The lighting system further includes a light engine including one or more light-emitting elements (LEEs). The light engine is optically coupled with an input aperture of the optical system to provide, to the optical system, the light for space illumination. Additionally, the lighting system includes a data routing device operatively coupled with the optical system or the light engine and configured to (i) process the downlink data and the uplink data, and (ii) establish operative communication with one or more devices based on the light emitted and received through the first output aperture.
A luminaire module (100) includes light-emitting elements (LEEs) (110) arranged to provide light; a light guide (130) including a receiving end (131a) and an opposing end (131b), the receiving end (131a) arranged to receive light provided by the LEEs (110), a core (134) including a first transparent material with a first refractive index (nl), the core (134) having a pair of opposing side surfaces (132a, 132b) extending along a length of the light guide (130) between the receiving and opposing ends (131a, 131b), and a cladding (136) including a second material having a second smaller refractive index (n2), the cladding (136) extending across and being in contact with at least a portion of the opposing side surfaces (132a, 132b) forming a cladding-core interface. The cladding-core interface is optically smooth. Additionally, the luminaire module (100) includes an optical extractor (140) arranged to receive guided light from the opposing end (131b) of the light guide (130) and configured to output into the ambient environment at least some of the received guided light.
F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
F21K 9/61 - Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
A luminaire includes (i) a first optical system to output light having a first output light distribution and a second optical system arranged adjacent the first optical system and to output light having a second different output light distribution; and (ii) a first light engine optically coupled to an input aperture of the first optical system and a second light engine optically coupled to an input aperture or the second optical system, the first and second light engine to allow independent control of amounts of light provided to the first and second optical systems. Each of the first and second optical systems has an output aperture displaced by a predetermined distance along a forward direction from the corresponding input aperture to direct light received at the input aperture to the output aperture. The first and second optical systems have elongate extensions extending sideways from the forward direction.
F21V 23/04 - Arrangement of electric circuit elements in or on lighting devices the elements being switches
F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
F21K 9/61 - Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
A luminaire includes a light source; N>2 optical fibers each having an input end and an output end, the input ends optically coupled to the light source, the optical fibers configured to guide light received at the input ends to the output ends; and an optical system having a receiving end and an optical extractor extending in a forward direction, the optical system extending sideways from the forward direction along a path and configured to direct light from the receiving end to the optical extractor. The receiving end is coupled with the output ends of the optical fibers along the path to receive light from the optical fibers. The optical extractor is configured to output the directed light to the ambient environment.
A luminaire includes a first light source and a second light source, the first and second light source operatively configured to provide amounts of light independently controllable during operation; and an optical system having an input aperture system and an output aperture system. The output aperture system is displaced by a predetermined distance along a forward direction from the input aperture system. The optical system is operatively coupled with the first and second light source and configured to direct light received at the input aperture system to the output aperture system. The output aperture system is configured to output light from the first light source in first directions and light from the second light source in second directions at least in part different from the first directions.
A system includes two or more phosphor-containing white LEDs (or other color-shifting artificial light sources) selected so that their combined color shift over at least 8,000 hours (e.g., at least 10,000 hours, at least 20,000 hours, at least 30,000 hours, at least 40,000 hours, up to 200,000 hours, up to 100,000 hours, up to 80,000 hours) of operation is less than at least one of the LED's (or the other color-shifting artificial light source's) color shift over that time. Here, the combined color shift (Δ'v') over the at least 8,000 hours (e.g., at least 10,000 hours, at least 20,000 hours, at least 30,000 hours, at least 40,000 hours, up to 200,000 hours, up to 100,000 hours, up to 80,000 hours) of operation can be less than 0.007 (e.g., 0.006 or less, 0.005 or less, 0.004 or less, 0.003 or less, 0.002 or less, 0.001 or less, 0.0005 or less).
A vehicle light includes a lighting unit (300) with multiple light-emitting elements (LEEs) (310), one or more couplers (320A,320B,320C), a light guide (300A,300B,300C) and an extractor (340A,340B,340C). The lighting unit has a curved elongate extension. Each of the couplers has an input aperture coupled with one or more of the LEEs and an exit aperture coupled with a first edge of the light guide and is configured to couple light from the LEEs into the light guide. The light guide is configured to propagate light via total internal reflection to a second edge of the light guide. The extractor has an input aperture coupled with the second edge of the light guide and an exit aperture configured to emit light into an ambient environment.
A plant growth lighting system (500) includes a plant support (503) and a light guide luminaire module (501), the plant support being configured to hold one or more plants (502). The light guide luminaire module includes at least one light-emitting element (LEE) (510), a light guide (511) arranged to receive light emitted by the at least one LEE at a first end of the light guide and guide the received light in a forward direction to a second end thereof, and an extractor (512) arranged to receive light from the second end of the light guide and configured to output light. The light guide luminaire module is disposed relative to the plant support such that at least a portion of the light output by the extractor impinges on the plants in predetermined directions.
Display devices (100) include a solid state-based light guide illumination device (101), one or more tertiary reflectors (170'), and a display panel (180´). The illumination device and tertiary reflectors provide a backlight for a display panel in the display device. Components of some of the disclosed displays are configured such that the one or two tertiary reflectors uniformly illuminate the rear of the display panel, so that all areas of the display panel have a uniform brightness when viewed by an observer, e.g., directly in front, and along an optical axis, of the display device. Moreover, components of some of the disclosed display devices are configured such that the rear of the display panel is uniformly illuminated regardless of whether the display panel receives the illumination from the illumination device directly, or from the one or two tertiary reflectors.
A lighting device includes (1) one or more solid-state lighting (SSL) devices, (2) a thick, for example prism- or cylinder- or spherical- or dome-shaped scattering element, and (3) an optical extractor with a convex output surface.
A light shaping article includes a solid optic having a cross-sectional profile including an input interface; a convex output surface opposite the input interface; a concave first side surface extending between the input interface and the convex output surface; and a second side surface opposite the concave first side surface extending from between input interface to the convex output surface. The concave first side surface and the convex output surface are configured such that, when the solid optic receives input light having an input angular range in a plane of the cross-sectional profile, the solid optic guides the light to and emits the light from the output surface in an output angular range in the plane. A prevalent propagation direction of output light in the output angular range is tilted toward the second side surface relative to a prevalent propagation direction of input light in the input angular range.
A luminaire module (301) including a plurality of light-emitting elements (310) arranged to emit light in a forward direction; a light guide (330) comprising a pair of opposing side surfaces extending from a receiving end of the light guide to an opposing end of the light guide, the light guide configured to guide light received at the receiving end from the light-emitting elements in the forward direction to the opposing end, wherein the light guide is elongated along a transverse direction orthogonal to the forward direction; and an optical extractor (340) elongated along the transverse direction and located at the opposing end of the light guide to receive the guided light, the optical extractor comprising a redirecting surface (346) and an output surface (344), wherein the received light undergoes two reflections off the redirecting surface prior to being output through the output surface in an ambient environment as output light in a backward angular range.
A troffer luminaire (400) including (i) a light guide luminaire module (401) having an optical extractor (440), and (ii) a reflector (470', 470''), where the reflector is configured to reflect light output by the optical extractor (440) in a backward angular range toward a target surface in a forward angular range, and where a combination of the optical extractor and the first reflector is configured such that a ratio of maximum luminance to minimum luminance across the first reflector is less than a first predetermined ratio.
A standing lamp includes a stand; first and second luminaire modules, each comprising a plurality of light emitting elements (LEEs) distributed along a first direction, a light guide and a housing configured to house at least the LEEs and to support the light guide; and a mount attaching the first and second luminaire modules to the stand.
A luminaire assembly includes a substrate; light emitting elements (LEEs) secured to the substrate; optical couplers arranged along the substrate, each optical coupler being positioned to receive light emitting from a corresponding one of the LEEs and to direct the light in a forward direction orthogonal to the substrate; a redirecting surface spaced apart from the couplers along the forward direction to reflect the light from the optical couplers to an ambient environment in a backward angular range; a housing comprising a support structure and a layer of a heat conducting material disposed on the support structure, where a thermal conductivity of the layer of heat conducting material is greater than a thermal conductivity of a material forming the support structure; and a heat coupling layer arranged between the substrate and the housing, the heat coupling layer being adjacent to the heat conducting material of the housing.
F21V 15/01 - Housings, e.g. material or assembling of housing parts
F21V 29/85 - Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
F21V 29/87 - Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
F21Y 101/02 - Miniature, e.g. light emitting diodes (LED)
A luminaire assembly includes: a substrate extending along a first direction comprising a first material having a first coefficient of thermal expansion; a plurality of light emitting elements (LEEs) secured to the substrate and arranged along the first direction; a light guide composed of a material having a second coefficient of thermal expansion different over an operating temperature range; a plurality of optical elements arranged along the first direction, each optical element being positioned to receive light emitted from a corresponding one or more of the LEEs and to direct the light to an edge of the light guide; a housing; and a heat coupling layer arranged between the substrate and the housing. The substrate and the heat coupling layer are constructed so that each of the plurality of LEEs, while secured to the substrate, remain registered with their corresponding optical element over the operating temperature range.
A solid-state luminaire module includes one or more light-emitting elements (LEEs) and a light guide. The light guide includes a receiving end and an opposing end, the receiving end being arranged to receive the light provided by the LEEs; a pair of opposing side surfaces, extending along a length of the light guide between the receiving end and the opposing end, to guide the received light in a forward direction; and a plurality of redirecting interfaces spaced apart from each other and distributed along a portion of the length of the light guide adjacent the opposing end. The redirecting interfaces are configured to reflect a portion of the guided light in a backward direction as return light, such that the return light can transmit through the pair of opposing side surfaces into the ambient as output light of the luminaire module, the output light to propagate in backward directions.
A solid-state luminaire module includes one or more light-emitting elements (LEEs) (110) arranged to provide light; and a light guide (130) including a receiving end arranged to receive the light provided by the LEEs and an opposing end, a pair of opposing side surfaces (132a, 132b) extending along a length of the light guide to guide the received light in a forward direction to the opposing end, and a redirecting end-face (140) located at the opposing end and configured to reflect the guided light - that reaches the opposing end - back into the light guide as return light, such that substantially all the return light impinges on the pair of opposing side surfaces (132a, 132b) at incident angles larger than a critical incidence angle and transmits through the pair of opposing side surfaces (132a, 132b) into the ambient as output light of the luminaire module, the output light to propagate in backward directions.
A workspace divider includes a divider frame, a screen secured to the divider frame so as to extend across and essentially span a central opening defined through the divider frame, and an illumination device carried by a top edge portion of the divider frame, the illumination device including a light source configured to emit light and disposed along the top edge portion of the divider frame, and a light transmitter extending from the top edge portion of the divider frame and configured to transmit light emitted from the light source and to direct the transmitted light laterally beyond at least one broad side of the divider frame, to illuminate a workspace bounded by the divider frame.
An illumination device includes a light-emitting element (LEEs); a light guide extending in a forward direction from a first end to a second end to receive at the first end LEE light and to guide the light to the second end, such that divergence of the light received at the first end and divergence of the guided light that reaches the second end are substantially the same; a light divergence modifier optically coupled to the light guide at the second end to receive the guided light, to modify the divergence of the guided light, such that the light provided by the light divergence modifier has a modified divergence different from the divergence of the guided light; and an optical extractor optically coupled to the light divergence modifier, to output into the ambient environment light provided by the light divergence modifier as output light in one or more output angular ranges.
An illumination device includes light-emitting elements (LEEs); a light guide extending in a forward direction from a first end to a second end, the light guide being positioned to receive at the first end light emitted by the LEEs and to guide the received light to the second end; and an optical extractor coupled to the second end to receive the guided light. The optical extractor is formed from a transparent, solid material and includes a first output surface including a transmissive portion arranged and shaped to transmit a first portion of the guided light to the ambient in a forward angular range and a reflective portion arranged and shaped to reflect via TIR all the guided light incident on the reflective portion; and a second output surface arranged to transmit, to the ambient in a backward angular range, light reflected by the reflective portion of the first output surface.
An illumination device includes a plurality of light-emitting elements (LEEs); a light guide extending in a forward direction from a first end to a second end to receive at the first end light emitted by the LEEs and to guide the received light to the second end; an optical extractor optically coupled to the second end to receive the guided light, the optical extractor including a redirecting surface to reflect a first portion of the guided light, the reflected light being output by the optical extractor in a backward angular range, and the redirecting surface having one or more transmissive portions to transmit a second portion of the guided light in the forward direction; and one or more optical elements optically coupled to the transmissive portions, the optical elements to modify the light transmitted through the transmissive portions and to output the modified light in a forward angular range.
The present technology relates to luminaires including a housing and a luminaire module disposed within the housing, where the housing has apertures through which light that is output by the luminaire module exits the luminaire towards one or more target areas.
The present technology relates to luminaires including light-emitting elements (LEEs), a luminaire module, and at least one optical modifier, where the optical modifier is arranged relative to the luminaire module to receive a fraction of light emitted by the LEEs.
A variety of light-emitting devices are disclosed that are configured to output light provided by a light source. In general, embodiments of the light-emitting devices feature a light source and an extractor element coupled to the light source, where the extractor element includes, at least in part, a total internal reflection (TIR) surface. Luminaires incorporating light-emitting devices of this type are also disclosed.
A light-emitting device includes a lens of refractive index n having a spherical exit surface of radius R and a luminous element positioned such that at least a portion of an edge of an emitting surface of the luminous element lies on a sphere of radius R/n opposite the exit surface, whereby that portion of the edge of the emitting surface is aplanatically imaged by the spherical exit surface. The light-emitting device may further include one or more reflective sidewalls arranged to reflect a fraction of light emitted from the luminous element before it is refracted by the exit surface. A luminaire incorporating a housing and a light-emitting device of this type is also provided, which may include one or more additional optical elements such as reflectors or lenses to further direct and shape light from the light-emitting device.
An illumination device (100) includes one or more light-emitting elements (LEEs) (110) arranged to provide light; a light guide (130) includes a receiving end and an opposing end, the receiving end being arranged to receive the light provided by the LEEs. The light guide (130) further includes a pair of opposing side surfaces (132a, 132b) extending along a length of the light guide between the receiving and opposing ends. The light guide is configured to guide the received light in a forward direction, along the length of the light guide toward the opposing end, and transmit a first portion of the guided light into ambient through one or more of the opposing side surfaces as sideways leaked light. The illumination device further includes an extractor (140) located at the opposing end and configured to output into the ambient a remaining portion of the guided light - that reaches the opposing end - as output light in backward directions.
A variety of luminaire modules are disclosed that are configured to output light provided by multiple light-emitting elements (LEEs). In general, embodiments of the luminaire modules feature at least two LEEs disposed on at least one substrate, at least two light guides that receive light from corresponding LEEs of the at least two LEEs, and at least one optical extractor that receives light from corresponding light guides from the at least two light guides.
An illumination device includes a light source configured to emit, during operation, light with a prevalent direction of propagation different from a direction of an optical axis of the illumination device; and an optical coupler including a transparent material, the optical coupler having an input aperture, an exit aperture and a first side surface and a second side surface arranged between the input aperture and the exit aperture, the exit aperture being centered on the optical axis of the illumination device. The optical coupler receives the emitted light through the input aperture from the light source. Further, the first side surface and the second side surface redirect the received light via total internal reflection (TIR) to the exit aperture. Additionally, the redirected light is issued through the exit aperture.
The present technology relates to achieving a low manufactured cost and high design alignment robustness for fabrication of modular light guide luminaires featuring solid state light-emitting elements.
A variety of light-emitting devices are disclosed that are configured to output light provided by a light-emitting element (LEE). In general, embodiments of the light-emitting devices feature a light-emitting element disposed in a recess, a scattering element that is spaced apart from the light-emitting element and an extractor element coupled to the scattering element.
Illumination devices with adjustable optical elements configured to provide a variable illumination pattern of an area are described. The adjustable optical elements of the illumination devices can be traversed relative to a surface (e.g., a ceiling of a room) to vary the light distribution and/or intensity to the surface.
An illumination device includes first light emitting elements (LEEs) optically coupled with first redirecting optics, and one or more second LEEs optically coupled with second redirecting optics; and a support to hold the illumination device spaced apart from and between a target surface and a diffusive surface. The first redirecting optics redirect light emitted by the first LEEs in a first angular range as first redirected light in a second angular range. The second redirecting optics redirect light emitted by the second LEEs in a third angular range as second redirected light in a fourth angular range. Additionally, prevalent directions of the first output light in the second angular range and the second output light in the fourth angular range are towards the diffusive surface and are different from each other, such that light that diffusely reflects from the diffusive surface illuminates two adjacent portions of the target surface.
A variety of light-emitting devices for general illumination utilizing solid state light sources (e.g., light-emitting diodes) are disclosed. A light-emitting device can include a first light-emitting element (LEE) for emitting light having a first spectral composition, a second LEE for emitting light having a second spectral composition, and a scattering element surrounding at least in part the first and second LEEs to scatter light emitted from the first and second LEEs. The light-emitting device can also include electrical connections for connecting the first and second LEEs to a power source, where the electrical connections are arranged such that power to the first LEE is separately adjustable relative to power to the second LEE.
A variety of illumination devices for general illumination utilizing solid state light sources (e.g., light-emitting diodes) are disclosed. In general, an illumination device can include multiple light sources that are disposed on a substrate, where at least some of the light sources include a light-emitting diode (LED) and a corresponding inelastic scattering element surrounding, at least in part, the LED. The inelastic scattering elements can have different light emission spectra. The illumination device can further include a light-mixing element adapted to receive light that is output by the light sources, where, during operation of the illumination device, each inelastic scattering element inelastically scatters light emitted from its corresponding LED, and the light-mixing element mixes the light received from the inelastic scattering elements to provide the output light.
A luminaire includes (i) light-emitting elements (LEEs), (ii) couplers to receive light from the LEEs and to redirect the received light, and (iii) a light guide including input and output ends and a pair of opposing surfaces both extending along an axis of the light guide. The light guide receives light from the couplers at the input end and guides light along the axis to the output end. The luminaire includes (iv) a diffuser adjacent the light guide to diffuse at least a portion of the light output by the light guide, and (v) a reflector to receive the light emitted from the output end of the light guide, such that light output by the light guide without impinging on the diffuser impinges on only one of the surfaces of the reflector. When operated, the luminaire outputs light within first and second output angular ranges.
Illumination systems are described for illuminating a target area, e.g., a floor of a room, using active illumination devices in optical communication with passive illumination devices. The active and passive illumination devices of the illumination system are configured and arranged relative to each other in a variety of ways so a variety of intensity distributions can be provided by the illumination system. Such illumination system is implemented to provide light for particular lighting applications, including office lighting, garage lighting, or cabinet lighting.
A variety of illumination devices are disclosed that are configured and arranged to output a direct intensity distribution onto work surfaces and an indirect intensity distribution towards background regions. The illumination devices include direct and indirect optical components configured to provide direct and indirect illumination. The illumination devices can be configured to allow interdependent as well as independent control of the direct and indirect illumination, e.g., by a user or by pre-programmed internal or external control circuitry.
A variety of illumination devices are disclosed that are configured to manipulate light provided by one or more light-emitting elements (LEEs). In general, embodiments of the illumination devices feature one or more optical couplers that redirect illumination from the LEEs to a reflector which then directs the light into a range of angles. In some embodiments, the illumination device includes a second reflector that reflects at least some of the light from the first reflector. In certain embodiments, the illumination device includes a light guide that guides light from the collector to the first reflector. The components of the illumination device can be configured to provide illumination devices that can provide a variety of intensity distributions. Such illumination devices can be configured to provide light for particular lighting applications, including office lighting, task lighting, cabinet lighting, garage lighting, wall wash, stack lighting, and downlighting.
Illumination devices are described for illuminating a target area, e.g., floors of a room, using solid-state light sources. In general, an illumination device includes a first light guide extending along a first plane, the first light guide to receive light from first light emitting elements (LEEs) and guide the light in a first direction in the first plane; a second light guide extending along the first plane, the second light guide to receive light from second LEEs and guide the light in a second direction in the first plane opposite to the first direction; a first redirecting optic to receive light from the first light guide and direct the light in first and second angular ranges; and a second redirecting optic to receive light from the second light guide and direct the light in third and fourth angular ranges, where the first, second, third and fourth angular ranges are different.
Devices used for workspace illumination include, for example, a panel and a solid-state based optical system arranged inside an enclosure of the panel. The panel can be a cubicle divider. In one aspect, an illumination device includes a mount; a panel including a first face and a second opposing face. The panel is vertically supported by the mount along a horizontal dimension of the first and second faces. Further, the panel forms an enclosure between the first and the second face. Additionally, the illumination device includes a first luminaire module arranged in the enclosure and configured to output light in a first output angular range. The light output in the first output angular range has a prevalent propagation direction with a vertical component towards a first target area.
A luminaire module delivers light with a beam angle of α. The luminaire module includes a light emitting module and a reflector positioned symmetrically about an axis. Light produced by the light emitting module exits the light emitting module from one or more spatially-extended light emitting portions. The light emitting portion(s) is (are) fully contained within a spatially extended notional design envelope which is used to guide the design of reflector and its corresponding reflective surface, such that when any light exiting the light emitting portions through the design envelope strikes the reflective surface of the reflector, the light does not return to the source and escapes from the luminaire module within a beam angle α, with no more than a single reflection from a reflector.
A variety of light-emitting devices are disclosed that are configured to output light provided by a light-emitting element (LEE). In general, embodiments of the light-emitting devices feature a light-emitting element, a scattering element that is spaced apart from the light-emitting element and an extractor element coupled to the scattering element, where the extractor element includes, at least in part, a total internal reflection surface. Luminaires incorporating light-emitting devices of this type are also disclosed.
A variety of light-emitting devices are disclosed that are configured to output light provided by a light-emitting element (LEE). In general, embodiments of the light-emitting devices feature two or more light-emitting elements, a scattering element that is spaced apart from the light-emitting elements, an extractor element coupled to the scattering element, and a reflective element that is configured and arranged to reflect light emitted from the light-emitting elements.
The present technology provides a solid-state lighting device and method of manufacturing same. The device can include a carrier substrate having registration features on a first side; light-emitting elements (LEEs) operatively coupled with the registration features; electrically conductive elements (ECEs) operatively coupled with a first side, where the ECEs operatively interconnect the LEEs; and one or more cover layers operatively coupled with the LEEs. The ECEs, furthermore, can be configured to operatively connect the LEEs to a source of power.
A variety of light-emitting devices for general illumination utilizing solid state light sources (e.g., light emitting diodes) are disclosed. In general, the devices include a scattering element in combination with an extractor element. The scattering element, which may include elastic and/or inelastic scattering centers, is spaced apart from the light source element. Opposite sides of the scattering element have asymmetric optical interfaces, there being a larger refractive index mismatch at the interface facing the light emitting element than the interface between the scattering element and the extractor element. Such a structure favors forward scattering of light from the scattering element. In other words, the system favors scattering out of the scattering element into the extractor element over backscattering light towards the light source element. The extractor element, in turn, is sized and shaped to reduce reflection of light exiting the light-emitting device at the devices interface with the ambient environment.
Light-emitting elements such as LEDs (714) are associated with light- converting material such as phosphor and/or other material. A donor substrate (720) comprising the light-converting and/or other material (726) is suitably placed relative to a target substrate associated with the light-emitting elements. A laser (730) or other energy source is then used to transfer the light-converting and/or other material in a pattern (738) via writing or masking from the donor substrate to the target substrate in accordance with the pattern. Addressability and targetability of the transfer process facilitates precise patterning of the target substrate.
H01L 51/50 - Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof specially adapted for light emission, e.g. organic light emitting diodes (OLED) or polymer light emitting devices (PLED)
53.
ILLUMINATION DEVICES INCLUDING MULTIPLE LIGHT EMITTING ELEMENTS
A variety of illumination devices are disclosed that are configured to manipulate light provided by one or more light-emitting elements (LEEs). In general, embodiments of the illumination devices feature one or more optical couplers that redirect illumination from the LEEs to a reflector which then directs the light into a range of angles. In some embodiments, the illumination device includes a second reflector that reflects at least some of the light from the first reflector. In certain embodiments, the illumination device includes a light guide that guides light from the collector to the first reflector. The components of the illumination device can be configured to provide illumination devices that can provide a variety of intensity distributions. Such illumination devices can be configured to provide light for particular lighting applications, including office lighting, task lighting, cabinet lighting, garage lighting, wall wash, stack lighting, and downlighting.
In a single lighting device including a large number of light-emitting elements (LEEs), the LEEs are divided into separately powered groups, and different combinations of the groups are fully energized to achieve the desired overall brightness. In some embodiments, the number of LEEs in each group has a binary relationship to the other groups. The resolution of the dimming is the brightness of the smallest group. In one example of five binary weighted groups of LEEs, 32 brightness levels can be achieved while the LEEs in the energized groups are fully ON. Thus, since there is no high frequency switching, there is substantially no power dissipation by the dimming control system, and there is limited noise or EMI created. The dimming control can be easily implemented with a logic circuit controlling a transistor switch for each group
In one embodiment, an LED lamp (57) has a generally bulb shape. The LEDs (22) are low power types and are encapsulated in thin, narrow, flexible strips (20). The LEDs (22) are connected in series in the strips (20) to drop a desired voltage. The strips (20) are affixed to the outer surface of a bulb form to provide structure to the lamp. The strips (20) are connected in parallel to a power supply, which may be housed in the lamp. Since many low power LEDs are used and are spread out over a large surface area, there is no need for a large metal heat sink. Further, the light emission is similar to that of an incandescent bulb. In other embodiment, there is no bulb form and the strips are bendable to have a variety of shapes. In another embodiment, a light sheet is bent to provide 360 degrees of light emission. Many other embodiments are described.
A solid state lamp, such as one that can replace an incandescent light bulb, has a base (10) portion having an electrical connector for connection to a source of power, such as an Edison-type connector for connection to the mains voltage. An AC/DC converter in the base converts the mains voltage to a suitable light emitting diode (LED) drive voltage. A plurality of receptacles on the base connects to electrodes of plug- in modules (26). Each plug- in module supports a plurality of low power LEDs connected in series. The strings of LEDs on different modules are connected in parallel when connected to the receptacles. The modules and base are configured to allow a user to operate the lamp with different combinations of modules to generate a desired light output from the lamp. For example, the user can recreate the lumens equivalent of a 20W, 40W, or 60W bulb by using one, two, or three modules.
A solid state light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED dies (56) have top and bottom electrodes, where the bottom electrode is a large reflective electrode. The bottom electrodes of an array of LEDs (e.g., 500 LEDs) are bonded to an array of electrodes formed on a bottom substrate (292). Conductive traces are formed on the bottom substrate connected to the electrodes. A transparent top substrate (300) is then formed over the bottom substrate (292). Various ways to operatively interconnect the LEDs are described along with many embodiments. According to some embodiments, the top substrate contains a conductor pattern that connects to LED electrodes and conductors on the bottom substrate. In another embodiment, a conductor layer is formed on the outer surface of the top substrate and makes contact with the LED electrodes and conductors on the bottom substrate via openings formed in the top substrate.
H01L 25/075 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
F21K 99/00 - Subject matter not provided for in other groups of this subclass
H01L 33/48 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof characterised by the semiconductor body packages
H01L 33/62 - Arrangements for conducting electric current to or from the semiconductor body, e.g. leadframe, wire-bond or solder balls
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