Light emitting diode (LED) street lamps are well known in the art. Such street lamps are configured with various constructions to provide different light distribution patterns in accordance with various codes and requirements. As shown in
In a first aspect of the subject invention, an LED light assembly is provided comprising: a housing; and, a plurality of LED light modules coupled together in axial end-to-end fashion so as to define an elongated lighting strip, each said light module including at least one heat dissipation block and at least one LED element, wherein, said lighting strip is secured to said housing.
In a further aspect of the subject invention, an LED light assembly is provided comprising: a housing; at least one LED light module having an heat dissipation block and at least one LED element, at least one channel being defined through said heat dissipation block; and, at least one support formed to pass through said at least one channel, wherein, said light module is secured to said housing with said at least one support passing through said at least one channel.
In yet a further aspect of the subject invention, an LED light assembly is provided comprising: a housing having a mounting wall; at least one LED light module including at least one heat dissipation block and at least one LED element, wherein, said lighting strip is secured to said housing, and, wherein said heat dissipation block of at least one said light module is canted so that with placement of said canted heat dissipation block against said mounting wall, the corresponding said at least one LED element is disposed in a plane not perpendicular to the plane of said mounting wall.
In yet a further aspect of the subject invention, a LED module is provided comprising: a base; at least one LED element secured to said base; and, a plurality of fins extending from said base opposite said at least one LED element, wherein, portions of at least one said fin adjacent to said base defines protrusions.
These and other features of the invention will be better understood through a study of the following detailed description and accompanying drawings.
A LED lighting assembly 10 is provided herein which is useable for various applications and is particularly well-suited for street and other outdoor lighting applications. As will be recognized by those skilled in the art, the subject invention allows for arrays of different light modules to be provided mounted in different orientations with different throw resulting in different light distribution patterns. The different aspects of the invention described herein may be used singularly or in various combinations.
In a first embodiment, with reference to the Figures, the LED light assembly 10 generally includes a housing 12 and at least one lighting strip 14. The lighting strip 14 includes a plurality of LED light modules 16 arranged in axial end-to-end fashion. As a result, the lighting strip 14 has an elongated shape which extends between first and second ends 18, 20.
Each of the light modules 16 includes at least one heat dissipation block 22 and at least one LED element 24. The heat dissipation block 22 is formed of a heat conductive material such as aluminum or other metallic material. The LED element 24 may be of any known configuration, and may include one or more lighting elements. The LED element 24 may be provided as a board. The LED element 24 is secured to the heat dissipation body 22 so that heat from operation of the LED element 24 is drawn therefrom and dissipated by the heat dissipation block 22. The heat dissipation block 22 may be of various configurations including being defined by a plurality of fins 26. Optical lenses may be optionally provided with one or more of the light modules 16 to widen or otherwise distort the light generated by the LED elements 24.
The light modules 16 each include first and second ends 28, 30 which are axially aligned in defining the lighting strip 14. The ends 28, 30 of adjacent light modules 16 are joined using any known technique. For example, mechanical interlocking may be utilized wherein portions of the heat dissipation blocks 22 of adjacent light modules 16 are forcibly joined, such as through mechanical deformation. In addition, or alternatively, one or more joining elements 32 may be utilized, such as keys 34. The ends 28, 30 of the light modules 16 may be formed with slots 36 into which the keys 34 may be inserted to provide retentive force to couple together adjacent light module 16. The keys 34 and the slots 36 may have corresponding matching cross-sectional shapes, such as one or more dovetails. In addition, it is preferred that the keys 34 be shaped slightly larger than the corresponding slots 36 so that interference fits are provided.
One or more LED drivers may be accommodated inside the housing 12 as is known in the art. The drivers may be coupled with the LED element 24 in any known manner. Dimmers, light sensors, and other controls may be also provided.
The housing 12 may be of any known configuration and may include a mounting flange 38 or other mounting structure for mounting the LED light assembly 10 to a desired location. The mounting flange 38 may be adapted for surface mounting, wire mounting (e.g., wire suspended mounting), or pole mounting. In addition, the housing 12 defines at least one mounting surface 40 to which the lighting strip 14 is secured. Mounting features, such as screw holes, hooks, detents, and so forth may be provided which are configured to securingly engage the lighting strip 14.
It is preferred that the lighting strip 14 be secured to the housing 12 at the mounting surface 40 with one or more points of securement 42 located at mid-points along its length between the first and second ends 18, 20. The points of securement 42 may be at channels 44 formed in one or more of the heat dissipation blocks 22 of the LED modules 16. The channels 44 may be perpendicular to and/or parallel to the LED element 24 depending on the intended mounting orientation of the lighting strip 14 to the housing 12. For example, the lighting strip 14 may be mounted to project light generally perpendicularly from, or, alternatively, generally parallel to, the axis of mounting of the housing 12, e.g., through the mounting flange 38, to a target surface (e.g., wall mounted (light projection generally perpendicular to axis of mounting (
As will be appreciated by those skilled in the art, to provide for multi-column arrays of the light module 16, a plurality of lighting strips 14 may be arranged in general parallel fashion and secured to an adjacent lighting strip 14 and/or to the housing 12 (
To provide additional stability, one or more straps 48 may be secured from the housing 12 to the first and/or second ends 18, 20 of one or more of the lighting strips 14. The one or more straps 48 may be used to secure one or more of the lighting strips 14 to the housing 12. The straps 48 may generate a force which presses one or more of the lighting strips 14 against the housing 12, e.g., pressing against at least one mounting surface 40, sufficiently to provide retention thereof. In this manner, additional mounting features may be optionally avoided.
One or more spacers may be provided between adjacent pairs of the lighting strips 14 to permit air flow therebetween. In addition, as shown in
As will be understood by those skilled in the art, the fasteners 46 need not be threaded to provide securement to the housing 12. The fasteners 46 may be secured to the housing 12 with various interconnections, such as bayonet locking, friction fit, and so forth.
With reference to
The housing 12 may be shaped as a prior art frame-shaped housing described above. One or more lighting strips 14 may be edge supported by the frame without need for intermediate dividers. In this manner, a plurality of the light modules 16 coupled together in axial end-to-end fashion may be provided to span the frame without requiring mid-span support from intermediate divider(s).
With reference to
The portions 52 may be defined on the fins 26 adjacent to the base 56. Preferably, the portions 52 extend only partially along the fins 26 near the base 56. It is preferred that the protrusions 54 be disposed along a limited length of the fins 26 extending from the base 56. With this arrangement, greater heat dissipation may be achieved adjacent to the base 56. With the escaping of this dissipated heat between the fins 26, greater heat dissipation may be achieved along the full length of the fins 26. The heat escaping between the fins 26 will cause air flow along the fins 26 with such air flow causing additional heat dissipation along the length of the fins 26.
The portions 52 may be of various configurations which increase surface area of the fins 26. By way of non-limiting example, the portions 52 may be fin-shaped. The portions 52 may be continuous or discontinuous and extend in various directions (away from the base 56, parallel to the base 56, oblique to the base 56, random or irregular directions, and so forth).
The different aspects herein (the lighting strip; channel mid-support; canting; protrusions) may be used singularly or in any combination.
This application claims priority to U.S. Provisional Patent Application No. 61/980,826, filed Apr. 17, 2014, the entire contents of which are incorporated by reference herein.
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