A lighting fixture is a ubiquitous device that provides artificial lighting in various indoor and outdoor settings. Conventional lighting fixtures reliant on incandescent or compact fluorescent lamp (CFL) lighting have typically used replaceable bulbs where the bulb contains the components to receive an electrical input and to emit light. More recently, light emitting diode (LED)-based lighting fixtures have utilized lighting modules that contain LEDs and corresponding driver electronics to manage and control electrical inputs received by the lighting fixture. The lighting module, which in some implementations may be in the form of a bulb, provides users a convenient form to install and/or replace light emitting components in a lighting fixture.
The Inventors, via previous innovative designs for lighting modules, have recognized and appreciated that a lighting module in which a light source and electronics are integrated within a single package generally simplifies the installation of the lighting module into a given lighting fixture. In one aspect, installation of such a lighting module into the lighting fixture is facilitated by using one of a variety of standard electrical connectors and/or coupling mechanisms. However, the Inventors have also recognized that conventional lighting modules are typically designed particularly for use with corresponding specific types of lighting fixtures (e.g., recessed lighting fixtures, surface mount lighting fixtures, floodlight fixtures, security lighting fixtures, outdoor fixtures such as pathway or garden lighting, tree lighting, step lighting, etc.), in which the type of lighting fixture may impose corresponding particular constraints on the lighting module (based on the lighting fixture configuration and/or application for which the lighting fixture is being used). For example, a conventional lighting module designed for a surface mount lighting fixture may not fit into a recessed lighting fixture.
As a result, a conventional lighting module designed for use with a particular type of lighting fixture may be unsuitable for use with other types of lighting fixtures. Additionally, if a user wishes to change some aspect of the lighting fixture (e.g., the light output), a different lighting module may be required. Accordingly, multiple types of lighting modules may be required to accommodate different types of lighting fixtures and the user's desired specifications in a given environment (e.g., an office, a house, a multifamily residential building) leading to higher costs and maintenance.
The present disclosure is thus directed to various inventive implementations of “universal” lighting modules that are compatible with a variety of different types of lighting fixtures (e.g., in terms of one or more of form factor, size, electrical connection requirements), and are particularly well-suited for easy installation and replacement by those who are not experienced electrical contractors or lighting designers (e.g., homeowners, do-it-yourself enthusiasts, etc.). In one aspect, the lighting modules described herein may have a sufficiently compact form factor that enables the lighting module to fit into various types of lighting fixtures or other containers/enclosures for the lighting module; examples of such containers/enclosures or lighting fixtures include, but not limited to, various types of electrical junction boxes, a recessed lighting fixture (e.g., a “can” housing of a recessed lighting fixture), a surface mount lighting fixture, a pendant lighting fixture, a floodlight fixture, an outdoor lighting fixture (e.g., a tree lighting fixture, a step lighting fixture, a ground or pathway lighting fixture, a garden lighting fixture), and a security lighting fixture.
In other aspects of a relatively compact design for the various lighting modules disclosed herein, the housing for the lighting module may be a single or multi-piece construction (e.g., a main housing body mechanically coupled to a back cover or back cap for the main housing body), and some portion of the housing may be configured to include therein an integrated electrical connector, mechanically engaged with at least a portion of the housing, to facilitate a compact profile for the lighting module. In various respects, an integrated electrical connector provides a more finished and “clean” look to the lighting module and mitigates the need for wires loosely hanging out of the lighting module; this in turn can make installation and replacement less intimidating to homeowners or do-it-yourself enthusiasts who may have little to no experience with electrical or lighting systems.
Thus, various inventive lighting modules described herein may be “universal” in that a given lighting module may be employed in different types of lighting fixtures used for different lighting applications (e.g., the lighting module may be interchangeable between different lighting fixtures in a given environment, thus simplifying maintenance. For example, the inventive lighting modules described herein may be installed in different types of electrical junction boxes, recessed can housings for a recessed lighting fixture, a garden or pathway lighting fixture, a tree lighting fixture, a pendant lighting fixtures, a decorative lighting fixture, a step lighting fixture, and a floodlight fixture. In some implementations, the lighting module can include a plurality of mounting holes configured to align with corresponding holes for a particular size of an electrical junction box. To install the lighting module into different-sized junction boxes or other contains/enclosures or lighting fixtures, in some implementations a lighting module may be used together with a coupling adapter to facilitate installation of the lighting module into different size apertures of a container/enclosure or lighting fixture. In one example, such a coupling adapter may include holes configured to align with both the junction box and the lighting module.
In various implementations, the inventive lighting modules described herein can be readily coupled to a trim in a variety of manners. For example, a given lighting module can couple to a trim with retaining springs, which can secure both the lighting module and the trim to a recessed can housing, for example. To install the lighting module into different-sized lighting fixtures, trims with various retaining springs can be used. In some implementations, a trim coupled to a lighting module significantly facilitates the dissipation of heat generated by the lighting module (e.g., heat generated by the light sources and/or driver/power electronics in the lighting module).
In some implementations, the module housing of the lighting module can also be used to enclose only a light source and a driver. To improve light output from the lighting module, optical elements can be disposed on each light source to couple more light into the surrounding air, the interior sidewalls of the module housing can be coated with a reflective coating to reduce parasitic absorption losses, and the cover lens can redirect light to a desired angular and spatial distribution. In this manner, in some lighting module examples, a separate reflective element does not need to be included, which can allow for a smaller form factor lighting module and reduce costs for manufacture and assembly.
In other implementations, a diffused lens or a clear lens with a diffuser can be utilized to protect the light source and provide more uniform illumination across the lens. In yet other implementations, a light guide can be utilized, wherein the light source is mounted on a sidewall of the housing of the lighting module to decrease the dimension of the module.
In sum, one example implementation is directed to a lighting module, comprising: a housing formed of a thermally conducting material having a thermal conductivity greater than at least 0.5 W·m−1K−1, the housing comprising a sidewall forming at least one substantially cylindrical cavity and comprising a flange surrounding an opening of the substantially cylindrical cavity; at least one integrated electrical connector, mechanically engaged with and substantially lodged within at least a portion of the housing, to receive AC voltage from an electrical system of a building; a light source including at least one LED disposed in the substantially cylindrical cavity; and an AC to DC converter, disposed in the substantially cylindrical cavity, to receive electrical energy from the at least one integrated electrical connector and supply regulated electrical energy to power the light source.
U.S. Pat. No. 9,964,266, issued May 8, 2018 and entitled “Unified Driver and Light Source Assembly for Recessed Lighting,” is incorporated by reference herein in its entirety.
It should be appreciated that all combinations of the foregoing concepts and additional concepts discussed in greater detail below (provided such concepts are not mutually inconsistent) are contemplated as being part of the inventive subject matter disclosed herein. In particular, all combinations of claimed subject matter appearing at the end of this disclosure are contemplated as being part of the inventive subject matter disclosed herein. It should also be appreciated that terminology explicitly employed herein that also may appear in any disclosure incorporated by reference should be accorded a meaning most consistent with the particular concepts disclosed herein.
The skilled artisan will understand that the drawings primarily are for illustrative purposes and are not intended to limit the scope of the inventive subject matter described herein. The drawings are not necessarily to scale; in some instances, various aspects of the inventive subject matter disclosed herein may be shown exaggerated or enlarged in the drawings to facilitate an understanding of different features. In the drawings, like reference characters generally refer to like features (e.g., functionally similar and/or structurally similar elements).
Following below are more detailed descriptions of various concepts related to, and implementations of, lighting modules that may be readily used with a variety of different containers/enclosures or different types of lighting fixtures in both indoor and outdoor environments. It should be appreciated that various concepts introduced above and discussed in greater detail below may be implemented in multiple ways. Examples of specific implementations and applications are provided primarily for illustrative purposes so as to enable those skilled in the art to practice the implementations and alternatives apparent to those skilled in the art.
The figures and example implementations described below are not meant to limit the scope of the present implementations to a single embodiment. Other implementations are possible by way of interchange of some or all of the described or illustrated elements. Moreover, where certain elements of the disclosed example implementations may be partially or fully implemented using known components, in some instances only those portions of such known components that are necessary for an understanding of the present implementations are described, and detailed descriptions of other portions of such known components are omitted so as not to obscure the present implementations.
In the discussion below, various examples of inventive lighting modules are provided, wherein a given example or set of examples showcases one or more particular features of a lighting module. It should be appreciated that one or more features discussed in connection with a given example of a lighting module may be employed in other examples of lighting modules according to the present disclosure, such that the various features disclosed herein may be readily combined in a given lighting module according to the present disclosure (provided that respective features are not mutually inconsistent).
In a first set of examples presented below, lighting modules are disclosed that include one or more of the following features: an electrical connector integrated in a housing of the lighting module (or a back cover/cap of the housing); LED light sources arranged proximate to an interior sidewall of the housing of the lighting module (e.g., in a substantially circular configuration) and positioned so as to back-light an optic (e.g., lens) of the lighting module; a lighting module housing with a snap fit connector configuration for mechanically coupling a trim to the lighting module (e.g., using a retaining spring); and a lighting module housing with a twist and lock connector configuration for mechanically coupling a trim to the lighting module.
As shown in
The back cover 120 may be used to house, at least in part, and/or mechanically support, the electrical connector 122 and to enclose a plurality of wires 126 that couples the electrical connector 122 to the driver 170. The electrical connector 122 may be mechanically engaged with the back cover such that it is substantially lodged within the back cover in a fixed position (e.g., via one or more snap-fit or push-to-fit tabs) in a formed compartment of the back cover. As shown in
In other examples discussed further below, the light source 160 and the driver 170 are on separate substrates, and the driver may be included in a back cover or an alternative back cavity of the housing. In one aspect of this alternative design, the driver electronics are placed in the housing at a greater distance from the light source, thereby reducing exposure of the driver electronics to heat generated by the light source (and vice versa).
In some implementations, as shown in
The back cover 120 may be formed from a variety of plastics and metals, including, but not limited to, aluminum, steel, stainless steel, polyethylene, polyethylene terephthalate, polyvinyl chloride, polypropylene, and polystyrene. Depending on the materials used to form the back cover 120, a variety of manufacturing methods can be used to fabricate the back cover 120 including, but not limited to, injection molding, milling, polishing, lapping, grinding, or any other method known to one of ordinary skill in the art.
The assembly of the back cover 120 to the module housing 110 defines a back cavity 111 disposed, in part, within a backside section 105 of the module housing 110 that partially encloses the electrical connector 122 and a plurality of wires 126 used to electrically couple the electrical connector 122 to the driver 170. In some implementations, the back cavity 111 may be partially defined by a plurality of rear fins 112 disposed on the rear exterior surface of the module housing 110. As shown in
In some implementations, the back cover 120 and the rear exterior surface of the module housing 110 may be configured to form a substantially sealed back cavity 111 enclosing the plurality of wires 126. By forming a sealed cavity, the plurality of wires 126 can be sufficiently isolated from the surrounding environment such that a separate grounding wire does not need to be included in the lighting module 100 to satisfy various electric codes specified by the National Electrical Code (NEC) and the Underwriters Laboratories (UL). In some implementations, the back cover 120 can be positioned such that the back cavity 111 is partially exposed to the surrounding environment through openings formed between the back cover 120 and the module housing 110. The openings can provide a pathway for air to circulate from the back cavity 111 to the surrounding environment, which can improve heat convection from the rear exterior surface of the module housing 110.
The module housing 110 may include a feedthrough 118 that allows the plurality of wires 126 to be fed through from the rear exterior surface of the module housing 110 to the rear interior surface of the cavity defined by the module housing 110 such that a first end of the plurality of wires 126 can be coupled to the driver 170. In some implementations, the feedthrough 118 may be a hole disposed on the rear surface of the module housing 110, as shown in
In some implementations, a strain relief feature 116 can be incorporated on the module housing 110 or the back cover 120 to relieve strain in the plurality of wires 126. For example, the strain relief feature 116 can mechanically couple to a portion of the wires 126 such that forces applied to the wires 126, e.g., during assembly, are not transferred to the first or second ends of the wires 126, where coupling to the driver 170 and the electrical connector 122 may be more fragile. For example, in some implementations, the strain relief feature 116 can be formed from a plurality of protruding features forming a slot dimensioned to be smaller than the diameter of the wires 126 on the exterior rear surface of the module housing 110, as shown in
The electrical connector 122 may be coupled to the back cover 120 using a variety of coupling mechanisms, including, but not limited to, a press fit, a snap fit, screw fasteners, adhesive, and tape. For example,
In some implementations, a plurality of rear fins 112 and/or side fins 114 may be disposed on the module housing 110 to improve heat dissipation to the surrounding air by increasing the surface area available for heat convection. For example,
In some implementations, the module housing 110 may also dissipate heat, in part, through a trim 190 coupled to the lighting module 100. The trim 190 may be used to cover a hole in a wall or ceiling into (or onto) which the lighting fixture that houses the lighting module 100 is installed. The trim 190 may mechanically contact the sidewall 102 of the module housing 110 along the cavity 113. This contact may provide an interface through which heat generated by the light source 160 and/or the driver 170 may be transferred via heat conduction. The heat received by the trim 190 may then be transferred to other portions of the trim 190 or the building structure that are at ambient temperature. In this manner, the trim 190 may be used to maintain the lighting module 100, particularly the light source 160, at a desired operating temperature, thus increasing the lifetime of the lighting module 100 and/or satisfying electrical code standards while reducing the overall size of the lighting module 100.
The light source 160 may be various types of electro-optical devices including, but not limited to, a light emitting diode (LED), an organic light emitting diode (OLED), and a polymer light emitting diode (PLED). In some implementations, the light source 160 may include one or more light emitting elements, e.g. multiple LEDs, OLEDs, or PLEDs, to increase light output and/or to alter the spectral characteristics of light emitted into the surrounding environment. The driver 170 may include various electronics and circuitry used to supply and regulate electricity in order to power and control the light source 160, respectively. In some implementations, the driver comprises an AC to DC converter to receive electrical energy from an AC power source (e.g., the electrical system of a building), and supply regulated electrical energy to power the lighting module (e.g., in the form of a DC voltage and/or current).
In some implementations, the light source 160 and the driver 170 may be disposed on a single board 174, e.g. a printed circuit board (PCB), as shown in
In some implementations, the one or more boards 174 supporting the light source 160 and the driver 170 may be coupled to the rear or side interior surface of the cavity defined by the module housing 110 using various coupling mechanisms including, but not limited to, adhesives, screw fasteners, tapes, and clips. For example,
As noted above, in some implementations, one or more light sources 160 may be substantially disposed near the center of the rear interior surface in the cavity 113 defined by the module housing 110, as shown in
The light source 160 may also include an optical element configured to increase the light output of the light source 160. In some implementations, the optical element may be a prism placed in contact with the light emitting element(s) of the light source 160. For example, the optical element can be formed from a material that is transparent and has a refractive index greater than 1 within the spectrum of light emitted by the light source 160. The optical element may be dimensioned and shaped to couple light from the light source 160 that would otherwise be trapped due to total internal reflection. As shown in
The interior surfaces of the cavity 113 defined by the module housing 110 may be configured to reflect light emitted by the light sources 160 to increase the light output of the lighting module 100 into the surrounding environment. In some implementations, the interior surfaces of the cavity may be coated with a reflective coating to reduce parasitic absorption of light from the module housing 110. The reflective coating may be a paint that reflects light diffusely (e.g., a white matte paint), specularly (e.g., a mirror-finish paint), or some combination thereof. In some implementations, the reflective coating may also be applied using powder coating. Additionally, a reflective film or sheet may also be applied to the interior surfaces of the cavity 113. In this manner, a separate reflective element may be excluded from the lighting module 100, reducing the form factor of the lighting module 100 and costs for manufacture and assembly.
The cover lens 130 may also be configured to transmit light in a direct or diffuse manner. In some implementations, the cover lens 130 can be configured to have a high optical clarity such that the spatial and angular distribution of emitted light is dependent primarily on the light source 160 and the reflective characteristics of the sidewalls of the cavity in the module housing 110. In some implementations, the cover lens 130 can be textured or patterned to scatter light. For example, the cover lens 130 can diffusely scatter light to provide more uniform soft lighting in the environment. The cover lens 130 may be an optical element that modifies the spatial and angular distribution of light coupled into the surrounding environment. The cover lens 130 may be formed into various shapes. For example, the cover lens 130 can be substantially flat, as shown in
In some implementations, the cover lens 130 may be coupled to the front surface of the module housing 110 such that the cover lens 130 is substantially flush with the front surface of the module housing 110. The cover lens 130 may be coupled to the module housing 110 using various connecting mechanisms including, but not limited to, adhesive, snap fits, clamps, and screw fasteners. In some implementations, the cover lens 130 and the module housing 110 can form a substantially sealed enclosure, which reduces the exposure of the driver 170 to the surrounding environment. By using the cover lens 130 to shield the driver 170 from the environment, potential fire risks and other hazards can be reduced, thus enabling the lighting module 100 to comply with fire codes specified by the National Electrical Code (NEC) and the Underwriters Laboratories UL).
The cover lens 130 can be formed from various optically transparent materials, e.g., glasses or polymers, including, but not limited to, polycarbonate, acrylic polymer, cyclo olefin polymer (Zeonex), polystyrene, silicate-based glasses, calcium fluoride, magnesium fluoride, silicon, germanium, or zinc selenide. Depending on the materials used to form the cover lens 130, various manufacturing methods can be used, including, but not limited to, injection molding, milling, polishing, lapping, grinding, hot embossing, or any other method known to one of ordinary skill in the art.
The lighting module 100 may be dimensioned and shaped to substantially fit inside a container/enclosure or a lighting fixture (also referred to herein as “external housings”) to facilitate installation of the lighting module 100 in a variety of indoor or outdoor architectural settings. Examples of external housings include, but are not limited to, various electrical junction boxes, recessed lighting fixtures, surface mount lighting fixtures, step lighting fixtures, garden lighting fixtures, security lighting fixtures, tree lighting fixtures, ground lighting fixtures, and pathway lighting fixtures.
The external housing may include an open aperture to facilitate placement of the lighting module 100 in a cavity defined by the external housing. The open aperture may also vary in size (e.g., the characteristic length may range from about 3 inches to about 10 inches) and shape (e.g., circular, rounded square, polygonal). For example,
The lighting module 100 may be coupled to the external housing using a variety of coupling mechanisms, including, but not limited to, screw fasteners, bolt fasteners, clamps, retaining springs, and clips. For example, in implementations where the external housing is a junction box 180, the module housing 110 can include a plurality of holes 140 configured to align with a plurality of holes 182 on the junction box 180, as shown in
In some implementations, the external housing may be a recessed can housing. The lighting module 100 can be coupled to the recessed can housing using a plurality of retainer springs disposed on the trim 190 coupled to the lighting module 100. The retainer springs can be configured to apply an outward force on the interior surface of the cavity in the recessed can housing to secure the lighting module 100 to the recessed can housing. The same trim 190 coupled to the lighting module 100 can be used for various sized recessed can housings so long as the outward force applied by the retainer spring is sufficient to hold the lighting module 100 in the recessed can housing. For larger recessed can housings, a different trim 190 can be coupled to the same lighting module 100 to ensure the lighting module 100 is securely coupled to the larger recessed can housing.
As described above, the lighting module 100 may also couple to the trim 190. The trim 190 is used to cover an exposed edge of a hole on a surface, e.g., a ceiling or a wall, where the lighting module 100 resides. The trim 190 can include an aperture to allow light from the lighting module 100 to pass through into the surrounding environment. For example,
The trim 190 can be coupled to the lighting module 100 using a variety of coupling mechanisms, including, but not limited to, a twist-and-lock connector, magnets, a snap-in connector, molded snap features, screw fasteners, clips, clamps, resins, and adhesives. For example,
In some implementations, the trim 190 can be coupled to the module housing 110 via a twist-and-lock connector. The connecting members 150 on the module housing 110 can be a plurality of twist-and-lock flanges formed integrally with the module housing 110, as shown in
In some implementations, the module housing 110 may include one or more types of connecting members 150 to improve compatibility with a broader range of trim types. For example,
In a second set of examples presented below, lighting modules are disclosed that include one or more of the following features: an electrical connector integrated in a housing of the lighting module; LED light sources arranged along an interior sidewall of the housing of the lighting module and positioned so as to edge-light an optic (e.g., light guide) of the lighting module; and a lighting module housing configured to facilitate mechanical coupling of a trim to the lighting module via one or more snap-fit mechanisms (e.g., using pressure-deformable snap tabs on the trim that grab onto the housing).
The module housing 110, as described above, is primarily used to support the various components of the lighting module 100 and to define the cavities 111 and 113 that contain the driver 170 and the light source 160, respectively. The depth of the cavities 111 and 113 as defined by the sidewall 102 may depend on the respective dimensions of the driver 170 and the light source 160. The depth of each cavity may be chosen to increase the distance and, hence, the thermal resistance (e.g., a combination of the air gap resistance and the sidewall resistance between the driver 170 and the light source 160) between the driver 170 and the light source 160. A larger thermal resistance reduces unwanted temperature increases in the driver 170 caused by heat generated by the light source 160, thus increasing the lifetime of both the driver 170 and the light source 160. However, the depth of each cavity may be limited by size constraints imposed on the lighting module 100, which may be dictated by the largest compatible lighting module 100 that can fit into a particular external housing of a lighting fixture. To this end, a shallower depth may be attainable with the aide of various heat dissipation features integrated into the module housing 110, which may divert heat from the light source 160 away from the driver 170.
For example,
In the exemplary module housing 110 depicted in
In some implementations, one or more venting holes (not shown) may be disposed on the sidewall 102 proximate to the cavity 113 and the light source 160. The one or more venting holes may allow air heated by the light source 160 to pass through from the cavity 113 into the surrounding ambient environment. The flow of heated air may be driven by convective currents caused by temperature gradients within the air in the cavity 113 and with respect to the surrounding air around the lighting module 110. The quantity, size, and locations of the one or more venting holes may be dictated by potential light leaks through the one or more venting holes. Light leaks may reduce the light coupling efficiency of the lighting module 100 and may also lead to undesirable aesthetics, particularly if the light leaks out through another opening in the lighting fixture (e.g., a separate hole in the wall or ceiling).
The partition 104 may include a feedthrough 160 to route a wire (not shown) between the cavities 111 and 113. The wire may be used to electrically couple the light source 160 and the driver 170 together. The feedthrough 160 may be dimensioned to have similar dimensions to the wire and/or may be filled with a grommet surrounding the wire or a filler material such as an adhesive, a paste, or an epoxy. In this manner, the cavities 111 and 113 may remain substantially isolated from one another. By keeping the cavities 111 and 113 separate, potential issues related to moisture accumulation are less likely to affect both the light source 160 and the driver 170.
The module housing 110 may also include coupling features to facilitate coupling of the lighting module 100 to an external housing of a lighting fixture. For example,
In some implementations, the module housing 110 may be formed from various thermally conductive materials including, but not limited to a metal such as aluminum, steel, and copper, or a thermally conductive polymer such as a Markrolon® polycarbonate or a Therma-Tech™ thermally conductive compound. The module housing 110 generally be formed from a material having a thermal conductivity greater than at least 0.5 W·m−1K−1. In some implementations, the module housing 110 may be formed entirely from a metal or a thermally conductive polymer depending on acceptable costs and/or thermal performance.
In some implementations, the module housing 110 may be formed as two parts using an overmolding process where an overmold is formed around a base part via casting, injection molding, or a similar process.
In
It should be appreciated that in other implementations, the overmold 115 may fully cover all surfaces of the base 117 (e.g., the base 117 is embedded into the overmold 115) or allow one or more than two surfaces of the base 117 to be exposed. It should also be appreciated that in other implementations, the relative proportions of the module housing 110 formed of the base 117 and the overmold 115 may also change. For example, the base 117 may define the second cavity 111, the plurality of fins 114, and the various coupling features to couple the lighting module 100 to an external housing of a lighting fixture or to couple at trim 190 to the lighting module 100.
The base 117 may be a thermally conductive material (e.g., having a thermal conductivity greater than about 0.5 W·m−1K−1), such as a metal, formed using various sheet metal, machining, or casting processes. The overmold 115 may also be a thermally conductive material (e.g., having a thermal conductivity greater than about 0.5 W·m−1K−1), such as a thermally conductive polymer.
The driver 170 may be mounted to the back cover 120 to better thermally separate the light source 160 from the driver 170. As shown, the driver 170 may be mounted in an inverted manner to the back cover 160. This may be accomplished by mounting the driver 170 to the back cover 120 using various coupling mechanisms including, but not limited to screw fasteners, adhesives, or a press fit. In some implementations, the back cover 120 may be a cup-shaped component that partially encloses the driver 170 as shown in
The lighting module 100 may also include the connector 122 to facilitate electrical coupling between the lighting module 100 and an external power source (e.g., an AC voltage from the electrical system of a building). As shown in
The electrical connector 122 depicted in
The light source 160 may include multiple light emitting elements that each emit light and are each operably coupled to the driver 170. The light emitting elements may each be supported by a printed circuit board (PCB) or a flexible circuit board (FCB). For example, the light emitting elements may be in the form of a flexible roll that is sufficiently compliant to conform with the cross-sectional shape of the cavity 113. In some implementations, the light emitting elements may be disposed in various locations in the cavity 113. For example,
In some implementations, the cross-sectional shape of the cavity 113 may be a polygon. For example,
In the case where the light emitting elements of the light source 160 are mounted on the sidewall 102 of the cavity 113, light emitted by the light emitting elements will be directed towards the center (or some interior location within the cavity 113) as opposed to being directed out of the lighting module 100. The optic 202 disposed within the cavity 113 may thus be used to redirect light emitted by the light source 160 out of the lighting module 100. In some implementations, the optic 202 may be tailored to output light as a beam with desired properties (e.g., a desired angular distribution, a desired spatial distribution, a desired chromatic dispersion).
The outcoupler 214, which may be disposed directly onto the light guide 212 on a surface facing towards the opening of the cavity 113, may be used to couple out light from the light guide 212 and thus, the lighting module 100. The outcoupler 214 may couple out light in a controlled manner that leads to the generation of a beam with the desired properties described above. This may be accomplished, in part, by the outcoupler 214 being a structured surface of the light guide 212. For example, the outcoupler 214 may be a series of prismatic microstructures formed directly onto the light guide 212. The shape and size of the microstructures may vary as a function of the location along the surface of the light guide 212. In some implementations, the outcoupler 214 may be designed based on a particular light emission profile of the light source 160 and position of the optic 202 with respect to the light source 160.
An optical film 216 with suitably designed extraction patterns may also be disposed on the outcoupler 214. The film 216 may further modify the beam profile of the light coupled out of the light guide 212. For example, the film 216 may be a diffuser that disperses and softens the light coupled out of the lighting module 100. In another example, the film 216 may be a filter that removes unwanted wavelengths from the light source 160. Generally speaking, the film 216 may facilitate reduction of glare, alter beam pattern of the light coupled out of the lighting module, and mask out artifacts of the light sight source.
The optic 202 as depicted in
The light guide 212 and the reflector 210 may be formed from various materials depending on the desired operating wavelength of the light source 160 including, but not limited to polymethyl methacrylate (PMMA), polycarbonate, silicon dioxide, borosilicate glass, magnesium fluoride, and calcium fluoride. In some implementations, the complex refractive index of the light guide 212 and the reflector 210 may be modified by introducing dopants into the material.
The optic 202 may be mounted to the module housing 110 using a retaining ring 204. The retaining ring 204 may be coupled to the module housing 110 using various coupling mechanisms including, but not limited to a screw fastener, a twist and lock mechanism, a snap fit connector, or an adhesive.
Any of the inventive lighting module examples discussed above may be employed in a variety of different lighting fixture configurations and/or inserted within a container/enclosure (e.g., an electrical junction box) for a variety of different architectural applications.
For example,
All parameters, dimensions, materials, and configurations described herein are meant to be exemplary and the actual parameters, dimensions, materials, and/or configurations will depend upon the specific application or applications for which the inventive teachings is/are used. It is to be understood that the foregoing embodiments are presented primarily by way of example and that, within the scope of the appended claims and equivalents thereto, inventive embodiments may be practiced otherwise than as specifically described and claimed. Inventive embodiments of the present disclosure are directed to each individual feature, system, article, material, kit, and/or method described herein.
In addition, any combination of two or more such features, systems, articles, materials, kits, and/or methods, if such features, systems, articles, materials, kits, and/or methods are not mutually inconsistent, is included within the inventive scope of the present disclosure. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions and arrangement of respective elements of the exemplary implementations without departing from the scope of the present disclosure. The use of a numerical range does not preclude equivalents that fall outside the range that fulfill the same function, in the same way, to produce the same result.
Also, various inventive concepts may be embodied as one or more methods, of which at least one example has been provided. The acts performed as part of the method may in some instances be ordered in different ways. Accordingly, in some inventive implementations, respective acts of a given method may be performed in an order different than specifically illustrated, which may include performing some acts simultaneously (even if such acts are shown as sequential acts in illustrative embodiments).
All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety.
All definitions, as defined and used herein, should be understood to control over dictionary definitions, definitions in documents incorporated by reference, and/or ordinary meanings of the defined terms.
The indefinite articles “a” and “an,” as used herein in the specification and in the claims, unless clearly indicated to the contrary, should be understood to mean “at least one.”
The phrase “and/or,” as used herein in the specification and in the claims, should be understood to mean “either or both” of the elements so conjoined, i.e., elements that are conjunctively present in some cases and disjunctively present in other cases. Multiple elements listed with “and/or” should be construed in the same fashion, i.e., “one or more” of the elements so conjoined. Other elements may optionally be present other than the elements specifically identified by the “and/or” clause, whether related or unrelated to those elements specifically identified. Thus, as a non-limiting example, a reference to “A and/or B”, when used in conjunction with open-ended language such as “comprising” can refer, in one embodiment, to A only (optionally including elements other than B); in another embodiment, to B only (optionally including elements other than A); in yet another embodiment, to both A and B (optionally including other elements); etc.
As used herein in the specification and in the claims, “or” should be understood to have the same meaning as “and/or” as defined above. For example, when separating items in a list, “or” or “and/or” shall be interpreted as being inclusive, i.e., the inclusion of at least one, but also including more than one, of a number or list of elements, and, optionally, additional unlisted items. Only terms clearly indicated to the contrary, such as “only one of” or “exactly one of,” or, when used in the claims, “consisting of,” will refer to the inclusion of exactly one element of a number or list of elements. In general, the term “or” as used herein shall only be interpreted as indicating exclusive alternatives (i.e. “one or the other but not both”) when preceded by terms of exclusivity, such as “either,” “one of,” “only one of,” or “exactly one of” “Consisting essentially of” when used in the claims, shall have its ordinary meaning as used in the field of patent law.
As used herein in the specification and in the claims, the phrase “at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements. This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase “at least one” refers, whether related or unrelated to those elements specifically identified. Thus, as a non-limiting example, “at least one of A and B” (or, equivalently, “at least one of A or B,” or, equivalently “at least one of A and/or B”) can refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including elements other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other elements); etc.
In the claims, as well as in the specification above, all transitional phrases such as “comprising,” “including,” “carrying,” “having,” “containing,” “involving,” “holding,” “composed of,” and the like are to be understood to be open-ended, i.e., to mean including but not limited to. Only the transitional phrases “consisting of” and “consisting essentially of” shall be closed or semi-closed transitional phrases, respectively, as set forth in the United States Patent Office Manual of Patent Examining Procedures, Section 2111.03.
The present application is a Bypass Continuation Application of International PCT Application PCT/US2019/032281, filed May 14, 2019, entitled “LIGHTING MODULE HAVING INTEGRATED ELECTRICAL CONNECTOR,” which claims priority to U.S. Provisional Application No. 62/671,372, filed on May 14, 2018, entitled “LIGHTING FIXTURE.” Each of the aforementioned applications is incorporated by reference herein in its entirety.
Number | Date | Country | |
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62671372 | May 2018 | US |
Number | Date | Country | |
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Parent | PCT/US2019/032281 | May 2019 | US |
Child | 17099650 | US |