Suspended linear fixture

This disclosure relates to suspended linear lighting fixtures that are arranged to accept lighting elements. Lighting fixtures according to the present disclosure comprise at least one body and at least one suspension mechanism. These lighting fixtures can be arranged such that electrical and mechanical connections can be provided at various locations along their length, rather than only at the distal ends of the fixtures. The fixtures can also comprise various connectivity features that allow further arrangements, designs and spatial adjustments. Lighting systems utilizing these fixtures are also disclosed.

BACKGROUND OF THE INVENTION

1. Field of the Invention

Described herein are devices relating to lighting fixtures, such as suspended linear lighting fixtures, that are well suited for use with solid state lighting sources, such as light emitting diodes (LEDs).

2. Description of the Related Art

Lighting fixtures, such as Troffer-style lighting fixtures, are ubiquitous in commercial office and industrial spaces throughout the world, oftentimes being designed to have a spatially convenient and aesthetically pleasing linear appearance. To this end, many of these lighting fixtures house linear elongated fluorescent light bulbs that span the length of the troffer. These lighting fixtures can be mounted to or suspended from ceilings, and can be at least partially recessed into the ceiling, with the back side of the troffer protruding into the plenum area above the ceiling. U.S. Pat. No. 5,823,663 to Bell, et al. and U.S. Pat. No. 6,210,025 to Schmidt, et al. are examples of typical troffer-style fixtures.

More recently, with the advent of the efficient solid state lighting sources, troffers and other commercial lighting fixtures have been developed that utilize LEDs as their light source. LEDs are solid state devices that convert electric energy to light and generally comprise one or more active regions of semiconductor material interposed between oppositely doped semiconductor layers. When a bias is applied across the doped layers, holes and electrons are injected into the active region where they recombine to generate light. Light is produced in the active region and emitted from surfaces of the LED.

LEDs have certain characteristics that make them desirable for many lighting applications, such as troffers, that were previously the realm of incandescent or fluorescent lights. Incandescent lights are very energy-inefficient light sources with approximately ninety percent of the electricity they consume being released as heat rather than light. Fluorescent light bulbs are more energy efficient than incandescent light bulbs by a factor of about 10, but are still relatively inefficient. LEDs by contrast, can emit the same luminous flux as incandescent and fluorescent lights using a fraction of the energy.

In addition, LEDs can have a significantly longer operational lifetime. Incandescent light bulbs have relatively short lifetimes, with some having a lifetime in the range of about 750-1000 hours. Fluorescent bulbs can also have lifetimes longer than incandescent bulbs such as in the range of approximately 10,000-20,000 hours, but provide less desirable color reproduction. In comparison, LEDs can have lifetimes between 50,000 and 70,000 hours. The increased efficiency and extended lifetime of LEDs is attractive to many lighting suppliers and has resulted in their LED lights being used in place of conventional lighting in many different applications. It is predicted that further improvements will result in their general acceptance in more and more lighting applications, including commercial lighting fixtures. An increase in the adoption of LEDs in place of incandescent or fluorescent lighting would result in increased lighting efficiency and significant energy saving.

LEDs can be arranged in different ways in the above mentioned lighting fixtures, with some fixtures having LEDs incorporated into a linear lighting device and having a structure similar to a florescent tube. These “tube” LED devices can resemble a linear florescent bulb and have electrodes and pins at both ends of their linear structure. Furthermore, suspended fixtures incorporating such linear lighting devices typically hold the lighting devices in place with mechanical support at both ends of their linear structure.

While such lighting fixtures are presently used, these fixtures are limited in how they can be designed and spatially arranged. For example, in the above described linear lighting fixtures, electrical and mechanical connections at both ends of an incorporated lighting device (i.e. a florescent tube, linear LED device, etc.) are typically required. This requirement inhibits freedom of design and arrangement of such fixtures and oftentimes requires the use of bulky additional components such as large troffer bodies. These additional components take up space, provide additional features that are subject to device failure and generally increase the time and cost of manufacturing such devices. Furthermore, these fixtures are usually fixated in a certain structure or arrangement and are not freely adjustable.

SUMMARY OF THE INVENTION

The present invention is generally directed to lighting fixtures, such as linear suspended lighting fixtures, that have increased freedom of design and arrangement. Lighting fixtures according to the present disclosure can have suspension mechanisms and electrical connections provided at various locations along their lengths and do not require physical or electrical connections at their distal ends.

In some embodiments, the lighting fixtures can comprise integrated one or more lighting bodies or light engines that are generally elongated and are suspended such as by a suspension mechanism. The fixtures can include a driver or power supply with electrical circuitry to generate a signal to drive the emitters in the lighting body. In some embodiments, the power supply is arranged separate from the lighting body, such as in a power supply cover at the ceiling where the lighting fixture is mounted. The electrical signal from the power supply can be transmitted to the lighting body in many ways, such as through the suspension mechanism. These embodiments generally comprise a suspended elongated lighting body separate from the driver or power supply.

One embodiment of a lighting fixture according to the present disclosure comprises a body configured to receive a linear lighting element and a suspension mechanism arranged to fix the body in place at least some distance away from a mounting surface. The suspension mechanism can be arranged to provide an electrical connection from the lighting element to a power source, such that the lighting element is unconnected to the power source at one or more distal ends of the lighting element.

Another embodiment of a lighting fixture according to the present disclosure comprises a body configured to receive at least one lighting element and a suspension mechanism arranged to fix the body in place at least some distance away from a mounting surface. The suspension mechanism can be arranged to attach to the body at multiple points on the body, wherein the suspension mechanism is arranged to provide an electrical connection from the lighting element to a power source.

An embodiment of a lighting system according to the present disclosure comprises a body, a linear lighting element attached to the body, a power supply and a suspension mechanism attached to the body. The suspension mechanism can be arranged to fix the body in place at least some distance away from a mounting surface. The suspension mechanism can also be arranged to provide an electrical connection to the lighting element, such that the lighting element is unconnected to said power supply at one or more distal ends of said lighting element.

These and other further features and advantages of the invention would be apparent to those skilled in the art from the following detailed description, taking together with the accompanying drawings, wherein like numerals designate corresponding parts in the figures, in which:

DETAILED DESCRIPTION OF THE INVENTION

The present disclosure is directed to different embodiments of lighting fixtures that allow for increased freedom of design and arrangement of the different light fixture features. Some embodiment can provide increased freedom concerning how their corresponding lighting elements or light engines are electrically and mechanically attached to other structures or arranged in space.

In some embodiments, lighting fixtures according to the present disclosure comprise linear bodies and their corresponding lighting elements are unattached electrically and/or mechanically at their distal ends. One of the features that make this possible is the selection of a lighting element, such as an LED light engine with a PCB, which allows for an electrical connection that can power the lighting element to connect to the lighting element in multiple possible locations.

In some embodiments, lighting fixtures according to the present disclosure can have mechanical suspension mechanisms and/or support structures that can be designed and arranged to be attached to the fixture's body at multiple points on the body rather than only be attached at a particular location, such as at the distal ends. In some embodiments, these suspension mechanisms and mechanical support structures can be adjusted or freely removed and reattached to provide different fixture arrangements. The suspension mechanism can also comprise an element to provide separation between the power supply and linear lighting body. In some embodiments, the power supply can be at the ceiling where the lighting fixture is mounted, with the power supply separated from the lighting body by the suspension mechanism.

In some embodiments, lighting fixtures according to the present disclosure can have various connection configurations, with some being self-connecting or self-coupling. That is, the light engines can be mounted in their operational location in the fixture without the need for mounting mechanisms or bonding materials. One such self-connecting configuration can be a “snap-fit” feature on the light engine or lighting fixture that cooperates with a connection structure on the other of the light engine or lighting fixture. In some embodiments, this connection configuration can allow the lighting engines to be removably mounted in the lighting fixture. Other connection configurations can pivot to allow for the angle or orientation of the lighting fixture to be adjusted, changing its position according to desired lighting requirements.

Throughout this description, the preferred embodiment and examples illustrated should be considered as exemplars, rather than as limitations on the present invention. As used herein, the term “invention,” “device,” “method,” “present invention,” “present device” or “present method” refers to any one of the embodiments of the invention described herein, and any equivalents. Furthermore, reference to various feature(s) of the “invention,” “device,” “method,” “present invention,” “present device” or “present method” throughout this document does not mean that all claimed embodiments or methods must include the referenced feature(s).

It is also understood that when an element or feature is referred to as being “on” or “adjacent” to another element or feature, it can be directly on or adjacent the other element or feature or intervening elements or features may also be present. It is also understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connect” or “directly coupled” to another element, there are no intervening elements present.

Relative terms such as “outer”, “above”, “lower”, “below”, “horizontal,” “vertical” and similar terms, may be used herein to describe a relationship of one feature to another. It is understood that these terms are intended to encompass different orientations in addition to the orientation depicted in the figures.

Although the terms first, second, etc. may be used herein to describe various elements or components, these elements or components should not be limited by these terms. These terms are only used to distinguish one element or component from another element or component. Thus, a first element or component discussed below could be termed a second element or component without departing from the teachings of the present invention. As used herein, the term “and/or” includes any and all combinations of one or more of the associated list items.

As used herein, the term “lighting element” refers to any structure that can emit light in response to an electrical signal and includes LEDs and LED devices containing one or more LEDs arranged into an array or incorporated into a light engine.

As used herein the term “distal” refers to the terminal ends of a structure furthest from the structure's center or from a point of attachment of another structure. For example, the distal ends of a linear lighting fixture are the terminal ends of the fixture furthest from the point of attachment of a suspension mechanism. The distal ends of a linear lighting element are its terminal ends furthest from the center of the lighting element.

Embodiments of the invention are described herein with reference to different views and illustrations that are schematic illustrations of idealized embodiments of the invention. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances are expected. Embodiments of the invention should not be construed as limited to the particular shapes of the regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing.

FIG. 1is a side perspective view of one embodiment of a lighting fixture100according to the present disclosure. Lighting fixture100comprises a lighting element body or light engine102, which can impart a linear shape to the fixture and can be arranged to receive at least one lighting element106, and at least one suspension mechanism104, which can fix body102spatially in place at least some distance away from a mounting surface, such as a ceiling, floor or wall. Lighting fixture100can further comprise a power supply cover108which can attach lighting fixture100to a mounting surface and conceal a power supply and/or power cord or other electrical connection elements. Suspension mechanism104can further comprise an attachment element110, which serves to attach body102to suspension mechanism104and can provide additional structural support for lighting fixture100. All of these named elements will be discussed in further detail below with reference to the additional figures.

Body102can be made from any suitable material that can impart a rigid structure but at least a portion of body102, which is configured to serve as a lens112, is capable of facilitating the transmittance of light. Body102can comprise a variety of materials, including but not limited to metals, plastics, acrylic, polyethylene, various other polymers and/or combinations thereof. In one embodiment, body102can be formed from polycarbonate (PC). Body102can be formed via a number of processes, including but not limited to extrusion and molding, such as injection molding.

Body102can be clear, transparent or translucent such that light emitted from light source104can easily pass through body102. Body102can also be diffuse, and in different embodiments can be made diffuse by various means including but not limited to being formed from a diffuse material, being patterned or shaped to have diffuse portions, or by adding materials having diffusing properties, such as diffusing particles. It is understood that the shape, dimensions and orientation of body102depicted in the drawings are but some of many the shapes, dimensions and orientation body102can take or comprise. Body102can comprise a variety of shapes, dimensions and orientations for various purposes, for example, depending on the lighting requirements of various spaces where lighting fixture100could be employed. In some embodiments, body102has a linear shape with at least one distal end114(two shown) which is distal from the point of attachment116of suspension mechanism104to body102. Since electrical and mechanical connections can be provided by suspension mechanism104, it may not be necessary to form such connections at or near the distal ends114of body102, which is typically necessary in contemporary linear fixtures. Since such connections at the distal ends114of body102are not necessary in fixtures according to the present disclosure, more freedom in the design and installation of such fixtures is achieved.

Suspension mechanism104, power supply cover108and attachment element110, can be made of the same materials as body102or can be made of different materials. Because in many embodiments suspension mechanism104, power supply cover108and attachment element110, typically do not need to facilitate the transmittance of light, these structures can be more readily made from opaque materials. In some embodiments these elements can comprise heat conductive materials, such as metals, to assist in radiating heat away from the lighting element106and dissipate it into the surrounding ambient.

The top surface of supply cover108can also comprise different arrangements.FIG. 2depicts a different side perspective view of a lighting fixture150, similar to lighting fixture100, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers. Lighting fixture150comprises body102, suspension mechanism104, power supply cover108and attachment element110. Like lighting fixture100inFIG. 1above, lighting fixture150is also configured to receive at least one lighting element106.FIG. 2shows the top surface152of power supply cover108. Top surface152can be configured to facilitate attachment to a mounting surface using various means known in the art including but not limited to adhesives and mechanical attachments such as screws, hooks and nails.

The top surface152of power supply cover108can further comprise one or more holes154. Holes154allow outside access to any power supply and/or electrical components internal to power supply cover108. Alternatively or in addition to the use of holes154, some or all of the top surface of power supply cover108can be missing, providing outside access to internal components. In this latter case, the outer edge156of the top surface152of power supply cover108can be attached to a mounting surface using means known in the art as described above. In some embodiments, power cover108is attached to a mounting surface, such as a ceiling, and an internal power supply within power supply cover108is put into electrical communication with a junction box within the mounting surface. In other embodiments, electrical connections, for example provided by cords or wires, can be directly established from a lighting element102to a junction box within the mounting surface.

FIG. 2shows another embodiment of a lighting fixture150, and more clearly shows attachment element110. Attachment element110can provide permanent or temporary attachment between body102and suspension mechanism104. Attachment element110can provide this attachment in various ways, for example by providing a complimentary surface to another surface on body102and/or suspension mechanism on which to utilize an adhesive or mechanical attachment element.

As mentioned above, the attachment element110can be self-coupling or self-connecting to allow for the body102to be mounted in its operation location in the light fixture100without the need for mounting fixtures such as screws, bolts, brackets, clamps, etc., or the need for bonding materials such as glues. These self-connecting attachment elements can also allow for the body102to be removable mounted in the fixture so that is can be removed from the fixture for repair or replacements. In some embodiment, the body102can be removed by hand from the fixture100.

In some embodiments, attachment element110comprises one or more attachment element snap-fit structures158that allow the body to be snapped into place. The elements in the attachment element110can be shaped or configured to interact or mate with one or more corresponding body snap-fit receiving structures160. The snap-fit attachment can be configured such that it is a strong and rigid attachment that prevents substantial movement of body102should body102be physically disturbed or displaced. Alternatively, the snap-fit arrangement can allow for body102to be securely attached to suspension mechanism104, but able to be displaced. For example, attachment element110and body102can utilize a grooved arrangement of attachment element snap-fit structures158and body snap-fit structures160to allow body102to slide in relation to attachment element110, while maintaining attachment between the two structures. This would allow a user to adjust the point of attachment of attachment element110to body102.

The snap-fit attachment can be configured such that body102is securely attached to suspension mechanism104and will not become unattached through the weight of body102or unintentional displacement of body102, but can become unattached due to intentionally applied force, for example manual operation force, applied directly to the snap fit connection. This arrangement allows for body102to be spatially re-adjusted in relation to suspension mechanism104, providing more freedom of arrangement in designing lighting arrangements, especially in limited space.

In some embodiments, attachment element110can be configured to contain a power supply and/or other electrical components. This configuration can be utilized alternatively or in addition to embodiments wherein power supply cover108contains a power supply and/or other electrical components. Various electrical components can be arranged internally to power supply cover108and/or attachment element110. For example, in embodiments where an LED lighting element106is to be utilized, current and voltage converters can be included in order to condition the input voltage and current to drive the appropriate design voltage and current of the LED circuit.

It is understood that while attachment arrangements utilizing attachment element110and body102are discussed above, other attachment arrangements are also possible. For example, in embodiments wherein suspension mechanism104does not comprise attachment element110, body102can attach directly to suspension mechanism104. In these embodiments, suspension mechanism104can comprise snap-fit structures or can be otherwise attached to body102as discussed above. Other attachment mechanisms can also be used including but not limited to, snaps, screws, hooks, brackets, rivets, Velcro, or bonding agents such as glue.

Considering now the body portion of lighting fixtures according to the present disclosure,FIG. 3depicts a front perspective view of one embodiment of lighting element body200according to the present disclosure. Lighting element body200is similar to lighting element body102described above, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers. Body102comprises lens112, body snap-fit structures160, and lighting element receiving structure202.FIG. 3is shown with the “lens-portion” in an upward facing orientation in contrast toFIGS. 1 and 2above which depict the “lens-portion” in a downward facing orientation.

The entirety of body102, or one or more dedicated surfaces, can serve as the lens portion112. Lens112can protect a received lighting element and can diffuse, magnify, or otherwise alter light output. Lens112should be made from a material that facilitates the transmittance of light. Lens112can be made of the same material as the rest of body102or can be made from a different material and integrated into body102, for example via a co-extrusion process. Lens112can be clear, transparent or translucent, or can comprise additional structures and materials for altering the color of emitted light, with some embodiments comprising wavelength altering materials such as phosphors. In other embodiments, lens112can comprise light scattering particles, and the lens112can be structured or patterned to increase light extraction. In other embodiments, light altering properties, such as diffusive properties, can be imparted to lens112, for example, by physically roughening the surface of lens112, for example, via a machining process.

As discussed above, body snap-fit structures160can be configured to interact or mate with corresponding structures on an attachment element or on the suspension mechanism itself.FIG. 3shows an embodiment wherein body snap-fit structures160comprise an accepting space204configured to receive a “hook-like” shape. A corresponding “hook-like” shape on an attachment element can be placed within accepting space204where it will become locked in place by one or more gripping edges206(two shown).

Applying force, such as manual force, to gripping edges206can allow a user to remove an attached attachment element or suspension mechanism from body102to allow for efficient cleaning and maintenance of lighting fixture200. Furthermore, a user could then reattach the attachment element or suspension mechanism to another portion of body102to change the appearance of lighting fixture200or to accommodate for limited space. This allows for an adjustable mechanical suspension support connection between the attachment element/suspension mechanism and body102.

FIG. 3further depicts lighting element receiving structures202, which are arranged to receive at least one lighting element. Lighting element receiving structures202can comprise a variety of shapes and configurations that allow or facilitate the receiving and incorporation of a lighting element into lighting fixture200. Various shapes and structures can be utilized as lighting element receiving structures202and can be integrated into the body as shown or be separately attached to the body. Example lighting element receiving structures202include wedge, fins or grooved structures. In the embodiment shown inFIG. 3, lighting element receiving structures202have a similar structure to gripping edges206, and can likewise be manually adjusted to remove a secured structure, in this case, a lighting element.

One or more portions of lighting element receiving structures202can be configured to be reflective surfaces208. By forming reflective surfaces208, the light extraction efficiency of lighting fixture200can be increased. Reflective surfaces208can be made reflective in various ways, including but not limited to treating them with a reflective film or chemical coating, by plating them with a reflective material or by selecting a reflective material for their composition. In some embodiments, reflective surfaces208are made of a material that is reflective white.

In some embodiments, the housing has an integrated transmissive portion and a reflective portion, with the transmissive portion and reflective portions formed together as one piece during manufacturing. In some embodiments, the upper portion or lens portion112can comprise the transmissive portion and can be transmissive of the light emitted from the lighting element. The lower portion can comprise the reflective portion and can be reflective to the light from the lighting element. In the embodiment shown, the transmissive portion begins generally at the portion that is above the reflective surfaces208, while the reflective surfaces208and anything below comprise a reflective material.

The transmissive portion can comprise any of the materials described herein and can be formed integral to the reflective portion by various processes such as co-extrusion or injection molding. The reflective portion can be formed of any materials described herein such as plastics, polymers and PC, with some of these materials being white. In other embodiments surfaces of the reflective portion can be coated with, or comprise, other reflective materials such as specular reflective or diffusing reflective materials. Forming integral lens and body portions allows for quick and inexpensive manufacturing of the body102, and results in a robust and rigid housing structure. It is understood that other features of the light engine can be formed integral to the light engine housing through the co-extrusion process.

FIG. 3show only one embodiment of body102that can have transmissive and reflective portions. In other embodiments, the transmissive portion can be smaller, and may only comprise the upper surface of the body102, with the other portions comprising a reflective material. In other embodiments, the transmissive portion may even be smaller and can comprise a strip down the middle of the body's top surface. Still other embodiments can have different shapes and designs for the transmissive portion.

Many different lighting elements can be utilized with lighting fixtures incorporating features of the present invention. In some embodiments, LED arrays or LED-based light engines can be used. For example,FIG. 4is a partial top perspective view of an example lighting element that can be utilized with fixtures according to the present disclosure.FIG. 4depicts a linear lighting element250comprising a reflective body252, one or more LEDs254, a printed circuit board (“PCB”)256(on the opposite surface of body252, shown in more detail inFIG. 5below) and electrical connections258. Body252can be made from a similar material to fixture body102discussed above, or made from another material know in the art that is suitable for mounting a plurality or array of LEDs. Multiple instances of lighting element250can be attached together by various means including chemical adhesives, soldering or mechanical attachment structures such as attachment clips260. Electrical connections258can connect directly to the PCB256.

Many different LEDs254can be utilized with lighting elements according to the present disclosure. For example, LEDs254can comprise highly efficient LED packages that are capable of operating at lower drive signals than many conventionally used LEDs. Since the current needed to drive such highly efficient LEDs can be lower, the power in each LED can also be lower. Multiple LEDs can be used to achieve the same output as fewer LEDs with a higher current. By using more LEDs the necessary heat dissipation area can be smaller. Examples of such highly efficient LEDs are described in detail in U.S. patent application Ser. Nos. 13/649,052, 13/649,067 and 13/770,389, all of which are assigned to Cree, Inc., which are hereby incorporated herein in their entirety by reference, including the drawings, charts, schematics, diagrams and related written description.

One way in which such highly efficient LEDs can operate at lower drive signals than convention LEDs is that the highly efficient LED packages have a greater LED area per package footprint, which can allow for higher packing density. In many applications, this allows for driving the same area of LED packages with a lower drive signal to achieve the same emission intensity. This can result in greater emission efficiency. In other embodiments, the same drive current can be used, and the LED packages that can be utilized with the present invention can be used to generate higher emission intensity. These embodiments provide the flexibility of providing LED package emission with high luminous flux, or with lower luminous flux at greater efficiency.

Considering now the arrangement of the PCB and the attachment of electrical connections,FIG. 5displays a partial top perspective view (with the “lens-side” in a downward facing position) of one embodiment of a lighting element configuration that can be utilized with the present disclosure, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers.FIG. 5depicts lighting fixture300, similar to lighting fixture150above. Lighting fixture300comprises body102, which is arranged to receive lighting element302, which is similar to lighting element250above, but is shown from the opposite side.

Like lighting element250shown above inFIG. 4, lighting element302comprises a body (not shown, it is on the opposite surface), one or more LEDs (not shown, they are on the opposite surface), a PCB256and one or more electrical connections258. Electrical connections258can attach directly to PCB256and provide power to lighting element302. Since PCBs can be designed such that an electrical connection can be provided at different locations, linear lighting fixtures can be designed such that electrical connections258are attached to linear lighting elements virtually anywhere along their position in the linear fixture, rather than only at the distal ends. Electrical connections258can be provided to PCB256by way of a suspension mechanism as will be discussed in further detail below.

While the present disclosure discusses the use of a PCB, with adjustments to body102and/or the use of highly efficient LEDs as discussed above, it is possible to utilize a conductive element structure instead of a PCB. Such a conductive element structure can include, for example, copper wire, conductive rails, magnet wire, non-conductive materials selectively coated with conductive materials, flattened braided wire and flex circuits on polyamide film. These and other substitutes for a traditional PCB are discussed in detail in U.S. patent application Ser. No. 13/782,820 to Mark Dixon, et al., entitled Integrated Linear Light Engine, which has been incorporated in its entirety by reference above into the present application.

In considering the arrangement of the light fixture body after it has received a lighting element,FIG. 6shows a front perspective view of one embodiment of a lighting fixture350, similar to lighting fixture200above, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers. LikeFIG. 3above,FIG. 6is shown with the “lens-end” in an upward position in contrast toFIGS. 1 and 2above which depict the “lens-end” in a downward position. Lighting fixture350comprises body102, which comprises lens112, body snap-fit structures160, lighting element receiving structure202, accepting space204, gripping edges206and reflective surfaces208.

Lighting fixture350is arranged to accept lighting element352, similar to lighting element250above, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers. Lighting element352comprises a body252, one or more LEDs254, a PCB (on the opposite surface of body252)256and electrical connections258.FIG. 6demonstrates the spatial arrangement of a lighting element352with the fixture body102. Lighting element352is received by body102and secured in place by lighting element receiving structure202. LEDs254face toward lens portion112, with the PCB256facing the opposite direction (toward the end of body102that will be facing an attachment element and/or suspension mechanism) and being in electrical contact with electrical connections258.

Some embodiments utilize different attachment elements and can allow further fixture adjustability through the employment of pivotal connections.FIG. 7is partial side perspective view of another embodiment of a lighting fixture according to the present disclosure.FIG. 7shows lighting fixture400, similar to lighting fixture100, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers. Lighting fixture400comprises body102, suspension mechanism104, lens112, and body snap-fit structures160. Body102is configured to receive a lighting element402, similar to lighting element250above, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers. Of the components of lighting element402, only PCB256can be seen inFIG. 7, the remaining lighting element components being concealed by body102.

Lighting fixture400further comprises attachment element404, which differs from attachment element110above in its shape and its attachment to suspension mechanism104. Attachment element404has an arch-like structure with a rounded top surface rather than the more angular structure depicted inFIG. 1. However, like attachment element110above, attachment element404and has attachment element snap-fit structures406which can interact or mate with body snap fit structures160, fixing body102in place.

Attachment element404is connected to suspension mechanism104by a pivotal connection408. Pivotal connection408can be achieved through various grove or hinge structures. In the embodiment depicted inFIG. 7, pivotal connection408is achieved through the connection of a grooved bolt410(which can be permanently attached to suspension mechanism104) and a corresponding attachment opening412(formed in attachment element404) that mates with grooved bolt410. The inner surface of attachment opening412can slide and adjust position with the grooved portion of grooved bolt410. This arrangement allows attachment element104, and therefore an attached fixture body102, to move pivotally about an axis formed by suspension mechanism104.

Pivotal connection408can be strong enough such that when the position of fixture body102is adjusted in relation to suspension mechanism104, the position will remain constant and will not change due unintentional displacement forces on lighting fixture400. For example, the weight of body102will not affect pivotal connection408, however an intentional direct manual force will. Alternatively or in addition to increasing the strength of pivotal connection408, unintentional displacement of body102can be prevented by installing a locking mechanism that can be toggled “on” or “off” and will prevent pivotal movement while toggled on. Such locking mechanisms are known in the art.

The suspension mechanism and attachment element can further arrange, provide or conceal electrical connections.FIG. 8is a partial unassembled view of one embodiment of a lighting fixture450, similar to lighting fixture400above, which is configured to accept a lighting element452, similar to lighting element402above, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers. Lighting fixture450comprises body102, suspension mechanism104, lens112and attachment element404, which comprises attachment element snap-fit structures406and pivotal connection408. Of the components of lighting element452, only PCB256and electrical connections258can be seen inFIG. 8, the remaining lighting element components being concealed by body102.

FIG. 8shows how electrical connections258can be provided to lighting element452by suspension mechanism104, which arranges and conceals electrical connections258. In the embodiment shown inFIG. 8, suspension mechanism104is hollow and electrical connections258are ran from a power supply through suspension mechanism104, through opening454, and then connected to PCB258, providing electrical power to lighting element452. In some embodiments, the interior surfaces of suspension mechanism104have additional structural elements such as wings or gripping structures that can further be used to organize and direct electrical connections258to lighting element452.

Suspension mechanism104can also act as a storage space for additional length of power cords and wires, in this way, a greater length of wire can be released from suspension mechanism104, if body102is detached from attachment element404, giving attachment element404a greater distance it can travel and reattach to a different point on body102without substantially straining or damaging electrical connections258. This provides greater freedom in designing mechanical suspension support for fixtures. Additional length of electrical connection components can also be stored within the inner surface of a mounting surface, for example, within or near a junction box within a ceiling.

Endcaps can be provided at the distal ends of light fixtures according to the present disclosure.FIG. 9is partial side perspective view of one embodiment of a lighting fixture500, similar to lighting fixture100above, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers. Lighting fixture500comprises body102, having at least one distal end114.FIG. 9illustrates that an optional endcap502can be utilized with this invention. Endcap502can interface with a distal end114of body102and provide additional protection and enclosure to components internal to body102, such as a lighting element. The additional protection provided by endcap502is especially useful in embodiments of the present invention wherein there are no electrical or mechanical connections present at the distal ends114of body102.

End caps are only one type of end cap that can be used and is only one of the many structures that can be included at the distal ends114of the body102. In other embodiments the distal end can have connection or coupling structures that can allow for the interconnection of a plurality of bodies. These can include electrical connections between the bodies to carry the emitter drive signal, and covers or connectors to hold the bodies to together and to cover the junction between the bodies. Different covers or connectors could hold the bodies in an end-to-end linear configuration, or can hold the bodies at an angle to one another, with some angled configurations described below.

Additional pivotal and/or rotational connection can be utilized with fixtures according to the present disclosure.FIG. 10is partial side perspective view of one embodiment of a lighting fixture600according to the present disclosure. Lighting fixture600comprises a power supply cover602and a suspension mechanism604which is arranged to provide an electrical connection606to at least one lighting element. Power supply cover602has an open top surface and, in this particular embodiment, does not completely contain a power supply or other electrical features. In this embodiment, power supply cover602would be attached to a mounting surface in which there is a junction box. A power supply or other electrical components can be at least partially installed into the junction box and connected to electrical connections606.

Lighting fixture600can also comprise one or more additional pivotal connections. A pivotal connection608can form a pivotal connection between the suspension mechanism and the power supply cover or even a mounting surface itself, allowing a user to adjust the position of the suspension mechanism604in relation to the power supply cover602or a mounting surface. Pivotal connections can be achieved through various means such as grove or hinge structures. In the embodiment shown inFIG. 10, pivotal connection608is achieved through use of a hinge structure where suspension mechanism604pivots about a hinge connecting power supply cover602with suspension mechanism604, which in turn allows motion of a fixture body connected to suspension mechanism604.

Suspension mechanism604can further comprise a rotational connection610, which allows suspension mechanism604, and thus an attached fixture body, to be rotated about the central axis of suspension mechanism604. Such rotational connections can be achieved through various means including utilizing a screw-like mechanism612to connect multiple portions of suspension mechanism604. The screw-like mechanism612can be effectively concealed in the interior surface of suspension mechanism604.

The power supply cover can also at least partially house the power supply.FIG. 11is partial top perspective view of one embodiment of a lighting fixture650according to the present disclosure. Lighting fixture650comprises a power supply cover652and a suspension mechanism654with a rotational connection656. Power supply cover652is arranged to at least partially contain at least one power supply658. In some embodiments power supply658is contained entirely in power supply cover652. In some embodiments, power supply658is partially contained in a junction box within a mounting surface. Power supply658can contain electrical components necessary to adjust electricity from the junction box to the appropriate drive current and voltage for an LED circuit on the PCB.

In some embodiments, the power supply cover itself can function as the suspension mechanism.FIG. 12demonstrates such an embodiment is a side perspective view of a lighting fixture750. Lighting fixture750comprises body702, configured to receive lighting element704and power supply cover706. Power supply cover706functions as a suspension mechanism fixing body702in place at least some distance away from a mounting surface (albeit typically a shorter distance than if a separate suspension mechanism were utilized).

Power supply cover706can incorporate features of other presently disclosed power supply covers, suspension mechanisms and attachment elements discussed above and the corresponding description is incorporated into this embodiment. Power supply cover706can further comprise an attachment element such as those discussed above. In the embodiment shown inFIG. 12, power supply cover706comprises at least one cover snap-fit structure708which can interact or mate with a corresponding body snap-fit cover710as discussed above.

To further illustrate embodiments wherein the power supply cover, suspension mechanism and attachment element are all integrated into a single structure,FIG. 13demonstrates a different side perspective view of a lighting fixture750, similar to lighting fixture700above, wherein the corresponding disclosure above is incorporated into this embodiment such that like features share the same reference numbers. Lighting fixture750comprises body702, configured to receive lighting element704and power supply cover706.

FIG. 13shows the top surface752of supply cover706which can be open or contain holes or other open portions as embodiments discussed above. Power supply cover752can be attached to body702such that the attachment connection between these two structures754allows for body702to slide in relation to power supply cover706. This can be accomplished by various means, such as a grooved connection. Like other embodiments above, the connection point754between power supply cover706and body702can be self-connecting and can be configured such that manual force applied to connection point754can allow body702to be removed so that body102can be later connected to supply cover706at a different point.

Other embodiments can be configured so that the body can be connected to either the power supply cover as shown inFIGS. 12 and 13, or connected to a suspension mechanism as shown inFIGS. 1 and 2, and discussed above. In those embodiments connected to the power supply cover the suspension mechanism is not used and the body can be snapped in place to the cover. In those embodiments using the suspension mechanism, the suspension mechanism can be attached to the power supply cover and the body can be snap fit to the suspension mechanism. The arrangement allows for flexibility in the manufacturing and use of the light fixtures according to the present invention, and allows for users to be provided with a single fixture than can be installed in both ways.

Many different arrangements are possible utilizing fixtures according to the present disclosure and multiple components such as fixture bodies and suspension mechanisms can be utilized in a single fixture.FIGS. 14 and 15show two different side perspective views of lighting fixtures800and850respectively. Each of these lighting fixtures comprises at least two bodies802,804arranged to receive at least one lighting element806, a power supply cover806, a suspension mechanism810that branches off to support and provide an electrical connection to the lighting element, and attachment elements812that attach bodies802,804to suspension mechanism810.

One or more power supplies and/or electrical connections can be arranged such that lighting elements806at each body802,804produce different lighting characteristics (i.e. intensity, flickering, etc.) or power supplies and connections can be arranged such that the lighting elements806at each body802,804produce the same or similar lighting characteristics.

Multiple bodies can also be utilized in embodiments wherein the power supply cover is also the suspension mechanism (such as the embodiments discussed above with reference toFIGS. 12 and 13.FIGS. 16 and 17show different side perspective views of lighting fixtures900and950respectively. Each of these fixtures comprise at least two bodies902,904, configured to accept at least one lighting element906, and a power supply cover908. Supply cover908can contain one or more power supplies and/or additional electrical components and can be configured to adjust electrical voltage and current to lighting elements906received by different bodies902,904such their various lighting characteristics are different or uniform depending on the desired lighting output.

Different lighting fixtures according to the present invention can be arranged in many different ways beyond those described above. In some embodiments, the lighting bodies can be arranged in different ways, there can be different numbers of lighting bodies interconnected in different ways, and additional features can be included in the lighting fixtures to accommodate the different lighting bodies. By way of example, the lighting bodies in the embodiments above are arranged in the fixtures such that their primary illumination is directed down in a direction opposite the power supply cover. In other embodiments, the lighting bodies can be arranged such that their primary illumination is directed up toward the power supply cover to illuminate the ceiling around the lighting fixtures. This light can then be reflected off the ceiling to illuminate the room below the ceiling.

FIG. 18shows another embodiment of a lighting fixture1000according to the present invention, comprising a suspension mechanism1004, a plurality of lighting bodies1002, a power supply cover1008that can be the similar to corresponding elements described in the embodiments above and can be made of the same materials. In this embodiment, the lighting fixture1000is arranged in a fan layout, with multiple lighting bodies1002radiating out from a central hub1010. The electrical signal to drive the lighting bodies1002can be transmitted to the lighting bodies1002through the suspension mechanism1004and the hub1010. The lighting fixture as shown comprises four lighting bodies1006(one hidden behind the hub1010), but different fan layout embodiments can have different numbers of lighting bodies of different lengths. In still other lighting fixtures, two lighting bodies can be used that are crossed to form the lighting fixtures fan layout, with the crossed bodies connected to a suspension mechanism.

The embodiments above have also been described with reference to straight lighting bodies, but other embodiments can have one or more bent lighting bodies.FIG. 19shows still another embodiment of a lighting fixture1020according to the present invention. This embodiment comprises a plurality of lighting bodies1022and a power supply cover1028. The lighting fixture1020comprises four lighting bodies1022that are bent in an arc and run between the power supply cover1028and a placeholder1030that can serve to hold the bottom ends of the light bodies1022. This embodiment can also comprise a suspension mechanism (not shown) that can run between the power supply cover1028to the placeholder1030. Other embodiments can be provides without a placeholder or without a suspension mechanism, with an electrical signal applied to each lighting element directly through the power supply cover1028. Still other embodiments can have different numbers of lighting elements bent into different shapes.

FIG. 20shows still other embodiment of a lighting fixture1040according to the present invention that is similar to the fan embodiment above and is also arranged in a fan layout. The lighting fixture comprises a suspension mechanism1044, lighting bodies1042, power supply cover1048and a central hub1050. In this embodiment, however, the lighting elements are angled up moving out from the hub1050. Holding wires1052can be included running between the power supply cover1048and each of the lighting bodies1042, although in other embodiments they may not be necessary. The lighting fixture1040has four lighting bodies1042each arranged at the same angle, but in other embodiments a different number of lighting bodies can be included, and in still other embodiments one or more of the lighting bodies can be arranged at different angles.

FIG. 21shows another embodiment of a lighting fixture1060comprising lighting bodies1062extending out at an angle moving away from the power supply cover1068. The light fixture1060is shown with four lighting bodies1062at the same angle, but similar to the light fixture1040, different numbers of lighting bodies can be used and the lighting fixtures can be at different angles.

FIG. 22shows still another embodiment of a lighting fixture1080according to the present with lighting bodies1082extending directly down from the power supply cover1088. This embodiment comprises two lighting bodies1082arranged back-to-back to provide a light emitting rod emitting light in opposing direction. To provide a more omnidirectional emission, the lighting fixture1080can comprise more than two lighting bodies generally arranged back to back and emitting out. In other embodiments, the lighting bodies can be spread on the power supply cover and can be oriented to provide the desired emission pattern.

Different lighting fixture embodiments can have lighting bodies that are shaped or coupled in many different ways to form different shapes and designs.FIG. 23is bottom view of another embodiment of a lighting fixture1100according to the present invention comprising a shaped lighting body1106suspended from a power supply cover1108by a suspension mechanism (not shown), with the lighting body provided in a Z-shape. In some embodiments, the lighting body can be formed in a Z-shape, while in other embodiments a plurality of lighting bodies can be coupled in a Z-shape. This is only one of the many shapes that the different embodiments can take, withFIG. 24showing another embodiment of a lighting fixture1120in having a square shape,FIG. 25showing a lighting fixture1130with an I-shape, andFIG. 26showing a lighting fixture1140with a fence shape. Each can be attached to a power supply cover1108by one or more suspension mechanisms (shown only inFIG. 24as1110). These embodiments can also be formed in these different shapes or can comprise a plurality of coupled lighting fixtures. The lighting fixtures can take other shapes such as triangle, rectangle, pentagon, or any other polygon shape. Different embodiments can also be provided in three-dimensional arrangements but not limited to pyramids or cubes.

FIG. 27is a bottom view of still another embodiment of a lighting fixture1160according to the present invention that comprises a right angle lighting body1166. This embodiment is particularly applicable for mounting at the corner of a ceiling, and the power supply cover1168can be mounted in the corner a well. The lighting bodies1166can be mounted to the power supply cover1168by a suspension mechanism (not shown) or can be mounted directly to the power supply cover1168.

The lighting elements described above can also take many different shapes and can have light sources arranged in different ways.FIGS. 28 through 30show another embodiment of a lighting fixture1200according to the present invention have a lighting body1202that is bow shaped. The lighting fixture can be mounted to a power supply cover1206by a suspension mechanism1208. The body1202comprises a central solid portion1210and edge solid portions1212that do not transmit light, and two lens portions1214that transmit light. The body1202can comprise one or more cables1215between the edges of the body1202to help hold the body1202in its bow shape, but in other embodiment cables may not be necessary. The lighting fixture1200further comprises two elongated lighting elements1216, each having an linear array of LEDs1218and each mounted to the central solid portion1210. The lighting elements1216can be mounted in many different ways, with the embodiment shown having lighting elements arranged with the LEDs emitting up toward the power supply cover1206.

Referring now toFIG. 30, light from the lighting elements1216is directed up toward, and at least partially reflects off the ceiling. A portion of the reflected light passes through the lens portions1214and light striking the solid portions1210,1212is blocked. Light primarily emits through the lens portions, while the solid portion1210can visually conceal many of the elements of lighting fixture. This allows for the lighting fixture1200to provide a visual appealing light emission pattern.

FIG. 31shows another embodiment of lighting fixture1240according to the present invention that is similar to the lighting fixture1200, but relies on direct emission through the lens portions1214. The lighting fixture1240comprises a lighting element bracket1242that is mounted to the central solid portion1210, with the bracket1242having lighting element channels1244to hold the lighting elements1216at an angle so that light primarily emits directly out of the lens portions1214. The brackets remain hidden behind the solid portion1210, with the lighting fixture also providing a visually appealing emission without relying on reflecting light from the ceiling.

FIGS. 32 through 34show still another embodiment of a lighting fixture1300that also relies on direct emission. The fixture comprises a lighting body1302with a V-shaped cross section and a V-shaped lens1304. The body can be mounted to a power supply cover (not shown) by a suspension mechanism1306. The inside surface of the body1302can have one or more lighting element channels1308to hold elongated lighting elements1310having LEDs emitting directly through the lens1304. The lens1304can mix and/or disperse the LED light as it passes through, with the lens being made of any of the materials described above. The body and lens1302,1304can be co-extruded, or can be separately formed and then snapped or bonded together.

In different embodiments the lighting element, body and lens can be arranged in different ways.FIG. 35shows another embodiment of a lighting fixture1340having a body1342and lens1344, with the body1342having a single lighting element channel1346in its upper portion. The channel holds a lighting element1348with its emitters emitting light down and through the lens1344. The lens in this embodiment has a curved cross section, but is otherwise similar to the lens1304described above.

Although the present invention has been described in detail with reference to certain preferred configurations thereof, other versions are possible. Embodiments of the present invention can comprise any combination of compatible features shown in the various figures, and these embodiments should not be limited to those expressly illustrated and discussed. Therefore, the spirit and scope of the invention should not be limited to the versions described above.

The foregoing is intended to cover all modifications and alternative constructions falling within the spirit and scope of the invention as expressed in the appended claims, wherein no portion of the disclosure is intended, expressly or implicitly, to be dedicated to the public domain if not set forth in the claims.