System and method for providing illumination using a modular heat sink structure and a lens

Abstract

Improved systems and methods for providing illumination with a high power lighting fixture having a modular thermal management structure and a lens. The embodiments include a heat sink structure including a heat sink outer arc having first and second end points and two heat sink diameters extending from the first and second end points, respectively, to a center point of the lighting fixture. The embodiments further include a lens attached to the heat sink structure and covering the light source, the lens including a lens outer arc having first and second end points and two lens diameters extending from the first and second end points, respectively, to a point different from the center point of the lighting fixture. The embodiments further include one or more ventilation channels disposed between the heat sink structures. The embodiments address color separation and shadowing issues that may be caused by heat sink shapes.

Description

Technical Field

[0001] The present disclosure generally relates to systems and methods for providing high-power lighting using a modular heat management structure and lenses that are modular.

Background Art

[0002] Some high-bay luminaires include a modular heat sink structure that creates a gap between optical lenses. The gap or channel creates the necessary ventilation path to allow the heat generated by the light source to flow upward away from the heat sink structure. The optical lenses within these luminaires are typically arranged concentrically with respect to the center of the luminaire to provide 360-degree coverage. Such high-bay luminaires that include an arcuate array of light-emitting diodes (LEDs) with an optical lens for each LED are configured to provide uniform task plane lighting. Unfortunately, the gaps created by the modular heat sink structure of the high-bay luminaire can separate colors and cast shadows on the task plane lighting. This is especially true when the luminaire includes an arcuate array of one or more LEDs and at least one ring optical lens shared by at least two LEDs.

Summary of the Invention

Problems to be Solved by the Invention

[0003] There is a need in the art for improved systems and methods for providing uniform lighting in high-power lighting fixtures featuring a modular heat sink structure and lenses.

Means for Solving the Problems

[0004] The present disclosure generally relates to lenses or optical elements for high-output lighting fixtures and high-output lighting fixtures including improved lenses or optical elements. Exemplary high-output lighting fixtures include modular heat sink structures separated by ventilation channels. Generally, embodiments of the present disclosure relate to improved lenses or optical elements for such high-output lighting fixtures where the improved lens or optical element is disposed non-concentrically within the fixture. The Applicant recognizes and understands that high-bay lighting fixtures including modular heat sink structures with ventilation channels can potentially separate colors and create shadows on task surfaces. Advantageously, the systems and methods described herein generate color-separated and shadow-free task surface illumination without reducing the number of LEDs and without adding cost.

[0005] Generally, in one aspect, a lighting fixture is provided. The lighting fixture includes an electronics housing and first and second heat sink structures coupled to the electronics housing, each heat sink structure of the first and second heat sink structures being at least partially defined by a heat sink outer arc having first and second end points, and each heat sink structure being further at least partially defined by two heat sink radii extending from the first and second end points, respectively, to a center point of the lighting fixture. The lighting fixture further includes first and second light sources and at least two lenses including a first lens attached to the first heat sink structure and covering the first light source and a second lens attached to the second heat sink structure and covering the second light source. Each lens of the first and second lenses is at least partially defined by a lens outer arc having first and second end points and two lens radii extending from the first and second end points, respectively, to a point different from the center point of the lighting fixture. The lighting fixture further includes a ventilation channel disposed between the first and second heat sink structures.

[0006] In certain embodiments, each lens of the at least two lenses is further at least partially defined by an inner arc extending between the two lens radii.

[0007] In certain embodiments, the point different from the center point of the lighting fixture is disposed along an imaginary line connecting the center point of the lighting fixture and the midpoint of the inner arc.

[0008] In certain embodiments, the first lens is non-concentric with the first heat sink structure.

[0009] In certain embodiments, the second lens is non-concentric with the second heat sink structure.

[0010] In one embodiment, the first or second lens is non-concentric with the lighting fixture.

[0011] In one embodiment, the first lens is attached to the first base of the first heat sink structure on a first surface facing outward when viewed from the electronic device housing, and the second lens is attached to the second base of the second heat sink structure on a second surface facing outward when viewed from the electronic device housing.

[0012] In one embodiment, the point is radially outward of the center point of the lighting fixture.

[0013] Generally, in another aspect, a method for manufacturing a lighting fixture is provided. The method includes providing an electronic device housing and coupling first and second heat sink structures to the electronic device housing, wherein each heat sink structure of the first and second heat sink structures is at least partially defined by a heat sink outer arc having first and second endpoints, and each heat sink structure is further at least partially defined by two heat sink diameters extending from the first and second endpoints, respectively, to the center point of the lighting fixture. The method further includes providing first and second light sources, attaching a first lens covering the first light source to the first heat sink structure, and attaching a second lens covering the second light source to the second heat sink structure. Each lens of the first and second lenses is at least partially defined by a lens outer arc having first and second endpoints, and each lens is further at least partially defined by two lens diameters extending from the first and second endpoints, respectively, to a point different from the center point of the lighting fixture. The method further includes providing a ventilation channel between the first and second heat sink structures.

[0014] In one embodiment, the first lens or the second lens is further at least partially defined by an inner arc extending between the two lens diameters.

[0015] In one embodiment, a point different from the center point of the lighting fixture is arranged along a virtual line connecting the center point of the lighting fixture and the midpoint of the inner arc.

[0016] In one embodiment, the first lens is non-concentric with the first heat sink structure, and the second lens is non-concentric with the second heat sink structure.

[0017] In one embodiment, the first or second lens is non-concentric with the lighting fixture.

[0018] In one embodiment, the first lens is attached to the first base of the first heat sink structure on a first surface facing outward when viewed from the electronic device housing, and the second lens is attached to the second base of the second heat sink structure on a second surface facing outward when viewed from the electronic device housing.

[0019] In one embodiment, a point different from the center point of the lighting fixture is radially outward of the center point of the lighting fixture.

[0020] It should be understood that all combinations of the above concepts and additional concepts discussed in more detail below (under the condition that such concepts do not conflict with each other) are contemplated as part of the subject matter of the invention disclosed herein. In particular, all combinations of the claimed subject matter described at the end of this disclosure are contemplated as part of the subject matter of the invention disclosed herein.

Brief Description of the Drawings

[0021] In the drawings, like reference characters generally refer to the same parts throughout different figures. Also, the drawings are not necessarily to scale; instead, emphasis is generally placed on illustrating the principles of the disclosure.

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DETAILED DESCRIPTION OF THE INVENTION

[0022] The present disclosure describes various embodiments of improved systems and methods for providing task - surface illumination in a high - output lighting fixture having a modular heat - sink structure. Some high - output lighting fixtures with a modular heat - sink structure include an array of LEDs and an optical lens for each LED, and these lighting fixtures provide shadow - free task - surface illumination whether configured to produce a narrow beam or a wide beam. The Applicant recognizes and understands that a high - output lighting fixture having a modular heat - sink structure, an array of LEDs, and a concentric ring lens shared by a plurality of LEDs may produce task - surface illumination having shadows cast by the gaps between the lenses. The Applicant further recognizes and understands that it is beneficial to modify the ring - lens structure with respect to other components of the lighting fixture to produce shadow - free task - surface illumination.

[0023] As used herein, the term "light fixture" refers to the implementation or configuration of one or more lighting units in a particular form factor, assembly, or package. A lighting unit refers to a device that includes one or more light sources of the same or different types and, where applicable, other components (e.g., a thermal - management structure, a light - directing structure, etc.). A given light fixture may have any one of a variety of mounting configurations for the (one or more) light sources, a variety of configurations and shapes of the enclosure / housing, and / or a variety of configurations of electrical and mechanical connections. Further, a given light fixture may optionally be associated with (e.g., include, be coupled to, and / or be integrally packaged with) a variety of other components (e.g., a control circuit) related to the operation of the (one or more) light sources.

[0024] Referring to FIG. 1, an exemplary bottom view of a high-output lighting fixture 50 is shown. A high-output lighting fixture (i.e., a high-bay lighting fixture) generally refers to a lighting fixture suspended at a height higher than 12 feet and a lighting fixture that generates at least about 10,000 lumens of light. Although not visible in FIG. 1, the high-output lighting fixture 50 includes an electronic device housing that includes electrical components such as an LED driver, a power supply unit, a communication module, etc. The electronic device housing 51 is shown in FIGS. 6 and 7. As described herein, the high-output lighting fixture 50 includes at least two modular heat sink structures and at least two optical lenses (one optical lens for each modular heat sink structure). Each of the at least two modular heat sink structures can be fixedly fixed to the electronic device housing. Each of the at least two optical lenses is fixed to the modular heat sink structure. In the exemplary high-output lighting fixture 50 shown in FIG. 1, six heat sink structures 52, 54, 56, 58, 60, and 62 are depicted. Although six heat sink structures are illustrated, it should be understood that an exemplary high-output lighting fixture can include four heat sink structures, three heat sink structures, or even two heat sink structures. An exemplary high-output lighting fixture can also include more than seven heat sink structures. Any suitable number of modular heat sink structures is contemplated.

[0025] The heat sink structures 52, 54, 56, 58, 60, and 62 are also depicted in FIG. 2. The base of each modular heat sink structure is defined by a heat sink outer arc, a heat sink diameter, and a heat sink inner arc or segment. Thus, the base of heat sink structure 52 is defined by heat sink outer arc 64, a first heat sink diameter 66, a second heat sink diameter 68, and an inner arc or segment 70. Heat sink outer arc 64 has endpoints 72 and 74 and an arc length L1 between endpoints 72 and 74. The first heat sink diameter 66 extends from endpoint 72 towards the center point P of the luminaire 50. The second heat sink diameter 68 extends from endpoint 74 towards the center point P of the luminaire 50. The base of each heat sink structure includes an outer arc to match the shape of the entire luminaire 50. Thus, it should be understood that the base of each heat sink structure can be modified to form any suitable outer perimeter to match any suitable shape of the entire luminaire. In one embodiment, the heat sink structures 52, 54, 56, 58, 60, and 62 are made from aluminum sheet metal using a method such as stamping. However, any suitable alternative materials and methods are contemplated.

[0026] As shown in FIGS. 1, 5, 6, and 7, each heat sink structure includes a surface to which a light source and a lens are attached. The surface that supports the light source and the lens faces outward as viewed from the electronic device housing. Each heat sink structure also includes an upward-facing surface on the opposite side of the surface that supports the light source and the lens. The base of each heat sink structure can further include one or more sidewalls that extend upward from the edge of the base toward the electronic device housing. In FIG. 1, such sidewalls extend into the page and are thus not visible. Such sidewalls are visible in FIGS. 6 and 7. In certain embodiments, a sidewall or a portion of a sidewall extends upward from an inner arc or segment 70 so as to be fixed to the electronic device housing. In the embodiments depicted in FIGS. 6 and 7, the sidewall of the heat sink structure 52 that contacts the electronic device housing 51 is higher than the other sidewalls that extend upward from the base of the heat sink structure 52. As shown in FIG. 7, the base of each modular heat sink structure is spaced apart from the electronic device housing 51. The distance between the base of each of at least two modular heat sink structures and the electronic device housing 51 depends on the height of one or more connecting sidewalls and the angle at which one or more connecting sidewalls are disposed between the base and the electronic device housing 51. This distance allows air to pass between the heat sink structure and the electronic device housing so as to lower the temperature of the heat sink structure during use. In certain embodiments, the electronic device housing 51 is made of aluminum using a method such as die casting. However, any suitable alternative material(s) and method(s) are contemplated. Channels 76 and 78 are disposed along the first and second heat sink diameters 66 and 68, respectively, so that the modular heat sink structure 52 does not directly contact the modular heat sink structure 54 or the modular heat sink structure 62 circumferentially about the center point P.

[0027] Channels 76 and 78 provide a path for air to flow upward between one or more sidewalls of adjacent modular heat sink structures. In the illustrated embodiment of the luminaire 50 having six modular heat sink structures, an additional channel 80 is provided between modular heat sink structures 54 and 56, an additional channel 82 is provided between modular heat sink structures 56 and 58, an additional channel 84 is provided between modular heat sink structures 58 and 60, and an additional channel 86 is provided between modular heat sink structures 60 and 62. The outer arcs of modular heat sink structures 52, 54, 56, 58, 60, and 62, together with channels 76, 78, 80, 82, 84, and 86, form the entire perimeter of the luminaire 50. The distance from the midpoint of channel 76 along outer arc 64 to the midpoint of channel 78 forms one-sixth or 60 degrees of the perimeter of the luminaire 50, as shown in FIG. 1. Each of the other modular heat sink structures, when combined with their channels, forms the other five-sixths or 300 degrees of the perimeter of the luminaire 50.

[0028] In an embodiment having only two modular heat sink structures, the first modular heat sink structure may be defined by a first heat sink diameter 66, a second heat sink diameter 88, an outer arc connecting the outermost endpoints of the first heat sink diameter 66 and the second heat sink diameter 88, and an inner arc or segment extending between the innermost endpoints of the first heat sink diameter 66 and the second heat sink diameter 88. The heat sink diameter 88 is shown in FIG. 2. Channels 78 and 80 may be omitted to form the first modular heat sink structure. In other words, heat sink structures 52, 54, and 56 may be combined to form the first modular heat sink structure. The outer arc of the first modular heat sink structure may form half of the perimeter of a luminaire including only two modular heat sink structures, together with half of channels 76 and 82. The second modular heat sink structure of an embodiment having only two modular heat sink structures may have the same structure as the first modular heat sink structure and may form the second half of the luminaire, together with the other half of channels 76 and 82. The second modular heat sink structure is a mirror image of the first modular heat sink structure. In some embodiments, the luminaire 50 includes a cap 92 and channel cover pieces 94, 96, 98, 100, 102, 104. In some embodiments, the cap 92 and channel cover pieces 94, 96, 98, 100, 102, 104 can be made from any suitable plastic or combination of plastics and may, for example, be snapped onto heat sink structures 52, 54, 56, 58, 60, and 62.

[0029] The high-power lighting fixture 50 further includes at least two light sources that are attached to a modular heat sink structure. In the embodiment shown in FIG. 1, which includes six heat sink structures, at least one light source is provided in the modular heat sink structure 52, at least one light source is provided in the modular heat sink structure 54, at least one light source is provided in the modular heat sink structure 56, at least one light source is provided in the modular heat sink structure 58, at least one light source is provided in the modular heat sink structure 60, and at least one light source is provided in the modular heat sink structure 62. Each of the light sources 53 (shown in FIG. 3) can be attached to its respective heat sink structure using a thermal tape or any suitable alternative. As shown in FIG. 3, each light source 53 can include a light-emitting diode (LED) disposed on a printed circuit board (PCB) 55. The LED is configured to be driven by one or more light source drivers to emit light of specific characteristics (i.e., color intensity and color temperature). The LED may be active (i.e., on), inactive (i.e., off), or dimmed by a factor d (0 ≦ d ≦ 1). A value of d = 0 means the LED is turned off, and d = 1 represents that the LED is at its maximum illumination. The LED can be embodied as an arcuate array of LEDs. For example, the light source 53 in FIG. 3 is arranged along five arcs A1, A2, A3, A4, and A5. However, it should be understood that any suitable arrangement is possible. In an embodiment that includes four heat sink structures, at least one light source is provided in each of the four heat sink structures. In an embodiment that includes only two heat sink structures, a first light source is provided in the first heat sink structure and a second light source is provided in the second heat sink structure. The light source 53 and the PCB 55, including the arcuate array of LEDs shown in FIG. 3, can be attached to the heat sink structure 52.

[0030] The high-power lighting fixture 50 is further attached to a modular heat sink structure and includes at least two lenses that cover the light source. The lenses are configured to collimate the light rays from the LEDs into a specific controlled beam that provides light of a desired intensity to the area to be covered. In the embodiments shown in FIGS. 1 and 5, which include six heat sink structures, at least one lens 106 is provided in the modular heat sink structure 52, at least one lens 108 is provided in the modular heat sink structure 54, at least one lens 110 is provided in the modular heat sink structure 56, at least one lens 112 is provided in the modular heat sink structure 58, at least one lens 114 is provided in the modular heat sink structure 60, and at least one lens 116 is provided in the modular heat sink structure 62. Each of the lenses 106, 108, 110, 112, 114, and 116 can be attached to its respective heat sink structure using a fastener or any suitable alternative. FIG. 4 shows the lens 106 that can be attached to the modular heat sink structure 52 over the light source 53 and the PCB 55. In one embodiment, the lens 106 is attached to the base surface of the modular heat sink structure 52 that faces outward when viewed from the electronic device housing 51. The four openings 107A, 107B, 107C, and 107D of the lens 106 can be configured to receive a fastener that extends through the openings 109A, 109B, 109C, and 109D of the PCB 55 (in FIG. 3). The same fastener can extend through the openings 111A, 111B, 111C, and 111D of the heat sink structure 52. Although the figure shows four openings in the lens 106, the PCB 55, and the heat sink structure 52, it should be understood that any number of openings can be included to accommodate any number of fasteners. Since the light source 52 is positioned between the lens 106 and the heat sink structure 52, the attachment of the lens 106 to the heat sink structure 52 using a fastener also holds the light source 53 in contact with the heat sink structure 52. The same can be said for the light sources and lenses attached to the heat sink structures 54, 56, 68, 60, and 62.In embodiments including four heat sink structures, at least one lens is provided on each of the four heat sink structures. In embodiments including only two heat sink structures, a first lens is provided on the first heat sink structure and a second lens is provided on the second heat sink structure. In certain embodiments, each of the lenses is a unitary element made from a molded transparent plastic material. In certain embodiments, each of the lenses is formed from optical grade silicone and may be flexible or elastic. In other embodiments, each of the lenses is formed from optical grade plastic, such as polymethyl methacrylate (“PMMA”), polycarbonate, or any suitable acrylic, or any other suitable material or combination of materials. In certain embodiments, each of the lenses includes a prism element for directing light rays from an LED.

[0031] In the embodiments shown in FIGS. 1, 4, and 5, each lens is defined by a lens outer arc, a lens diameter, and a lens inner arc. Thus, lens 106 is defined by a lens outer arc 120, a first lens diameter 122, a second lens diameter 124, and a lens inner arc 126, as shown in FIG. 4. The lens outer arc 120 has endpoints 128 and 130 and a lens arc length L2 between endpoints 128 and 130. The first lens diameter 122 extends from endpoint 128 to point P1, as shown in FIG. 5. The second lens diameter 124 extends from endpoint 130 to point P1, as shown in FIG. 5. Critically, point P1 does not coincide with the center point P of the luminaire 50 within the cap 92 of FIG. 5. In other words, point P1 is positioned offset with respect to the center point P of the luminaire 50.

[0032] As shown in FIGS. 4 and 5, the inner lens arc 126 has end points 134 and 136, a midpoint 138, and an inner lens arc length L3 that extends along a continuous curve from end point 134 through midpoint 138 to end point 136. As shown in FIG. 5, point P1 is disposed along a virtual line 140 that connects the center point P of the luminaire 50 and the midpoint 138 of the inner arc 126.

[0033] The lens 106 is non-concentric with the modular heat sink structure 52 to which the lens 106 is attached. In certain embodiments, the lens 106 is non-concentric with the entire luminaire 50. As shown in FIGS. 1, 4, and 5, the outer lens arc 120 is non-concentric with the heat sink outer arc 64. Similarly, the inner lens arc 126 is non-concentric with the heat sink inner arc or segment 70. The lens diameters 122 and 124 are also non-concentric with the heat sink diameters 66 and 68. The same non-concentricity can be said for the other lenses 108, 110, 112, 114, 116 with respect to their respective other modular heat sink structures 54, 56, 58, 60, 62 and / or the entire luminaire 50.

[0034] As described above, the distance from the midpoint of channel 76 to the midpoint of channel 78 along the outer arc 64 of the heat sink forms one sixth or 60 degrees of the perimeter of the luminaire 50. By providing lenses 106, 108, 110, 112, 114, 116 to be non-concentric with respect to the entire luminaire 50, each lens creates a light beam that covers 60 degrees of the perimeter of the luminaire 50. In embodiments including four heat sink structures, each lens can be configured to create a light beam that covers 90 degrees of the perimeter of the luminaire 50. In embodiments including only two heat sink structures, each lens can be configured to create a light beam that covers 180 degrees of the luminaire 50. Each lens can be configured to support a beam angle having a narrow distribution in certain embodiments. In other embodiments, each lens can be configured to support a beam angle having a medium or wide distribution. As shown in the embodiments, each lens is in the shape of a truncated circular sector.

[0035] Conventional lighting fixtures with a modular heat sink structure include lenses that are concentrically arranged with respect to the center point of the lighting fixture to provide 360-degree coverage. When a lens is provided for each LED, the gaps (i.e., channels) created by the modular heat sink structure are not a problem. However, when lenses are provided for two or more LEDs for each heat sink structure, the gaps (i.e., channels) created by the modular heat sink structure can cast shadows on the task plane illumination. The improved systems and methods disclosed herein use a modular heat sink structure and non-concentric lenses that form gaps or channels to provide shadow-free, uniform illumination for task plane illumination. The applicant recognizes and understands that the gaps formed by the modular heat sink structure can be filled in by shortening the lens diameter of each lens. By doing so, a larger light ray coverage is created without changing the number of LEDs provided and without adding cost. In the case of lenses that are concentric with the modular heat sink structure and the entire lighting fixture (i.e., no non-concentric lenses), each lens creates a light ray that covers only 34.91 degrees around the lighting fixture 50 in an embodiment that includes six heat sink structures. Thus, all lenses in such an embodiment with concentric lenses cover only about 210 degrees around the lighting fixture.

[0036] As described above, the light source 53 in FIG. 3 is arranged along five arcs A1, A2, A3, A4, and A5. A light source with the same arrangement can be provided for each heat sink structure and the corresponding lens. As shown in FIGS. 6 and 7, each of the lenses 106, 108, 110, 112, 114, and 116 includes five protruding arcs 150, 152, 154, 156, and 158. In other words, lens 106 includes five protruding arcs, lens 108 includes five protruding arcs, lens 110 includes five protruding arcs, lens 112 includes five protruding arcs, lens 114 includes five protruding arcs, and lens 116 includes five protruding arcs. Although five protruding arcs are shown in the figure, it should be understood that any suitable number is conceivable depending on the arrangement of the light sources. Each of the protruding arcs of each lens corresponds to the positions of the arcs A1, A2, A3, A4, and A5 of the LEDs shown in FIG. 3. Thus, the protruding arc 150 of lens 106 is positioned to cover the LED arranged along arc A1, the protruding arc 152 of lens 106 is positioned to cover the LED arranged along arc A2, the protruding arc 154 is positioned to cover the LED arranged along arc A3, the protruding arc 156 is positioned to cover the LED arranged along arc A4, and the protruding arc 158 is positioned to cover the LED arranged along arc A5.

[0037] A bottom perspective view of lens 106 is shown in FIG. 8A. A cross-sectional view of lens 106 is shown in FIG. 8B. The following description should be understood in consideration of FIGS. 8A and 8B. Protruding arcs 150, 152, 154, 156, and 158 form cavities around the LED on arcs A1, A2, A3, A4, and A5. Protruding arcs 150, 152, 154, 156, and 158 have an inner surface facing the LED and an outer surface facing outward as viewed from the LED. In other words, the inner surfaces of protruding arcs 150, 152, 154, 156, and 158 face upward toward the electronic device housing 51 when assembled, and the outer surfaces of protruding arcs 150, 152, 154, 156, and 158 face downward outward as viewed from the electronic device housing 51 when assembled. In one embodiment, as shown in FIG. 8B, each of the inner surfaces of protruding arcs 150, 152, 154, 156, and 158 has a first profile 160, and each of the outer surfaces of protruding arcs 150, 152, 154, 156, and 158 has a second profile 162. In one embodiment, profiles 160 and 162 are not the same and are not mirror images of each other. Each profile 160 of the inner surfaces of protruding arcs 150, 152, 154, 156, and 158 is formed by two tapered surfaces 164A and 164B in one embodiment. Each profile 162 of the outer surfaces of protruding arcs 150, 152, 154, 156, and 158 is formed by a single arcuate surface 166 in one embodiment. Tapered surfaces 164A and 164B meet along an arc that aligns with the midpoint of arcuate surface 166. As shown in FIG. 8B, tapered surfaces 164A and 164B are spaced a certain distance from arcuate surface 166. Light from the LED can pass through profiles 162 and 164.

[0038] Only a portion of the protruding arc 156 is shown in FIG. 8B because the particular arc is divided into two segments and a cross-section is taken between the two segments in the illustrated embodiment. The protruding arc 156 is divided into two segments by the opening 170 of the lens 106 to enable connection to the LED. It should be understood that the opening 170 can be arranged in any suitable shape and configuration. For example, the opening 170 is shown as rectangular, but any other suitable shape is also contemplated. Further, for example, in an embodiment including four heat sink structures, each of the four lenses can include three protruding arcs instead of five, and a corresponding opening 170 can be positioned at the center of the lens 106 and divide the middle protruding arc of the three protruding arcs into two segments.

[0039] In FIG. 9, an exemplary process for manufacturing a high-power lighting fixture with a modular heat sink structure and a lens is provided. In step 902, an electronic device housing (e.g., housing 51) is provided.

[0040] In step 904, first and second heat sink structures (e.g., structures 52, 54, 56, 58, 60, and 62) are coupled to the electronic device housing. Each heat sink structure is at least partially defined by a heat sink outer arc (e.g., arc 64) having a heat sink outer arc length (e.g., length L1). The heat sink outer arc length has first and second endpoints (e.g., points 72 and 74). Each heat sink structure is further at least partially defined by two heat sink diameters (e.g., diameters 66 and 68) extending from the first and second endpoints, respectively, to the center point (e.g., point P) of the lighting fixture.

[0041] In step 906, first and second light sources (e.g., light source 53) are provided.

[0042] In step 908, a first lens (e.g., lens 106) is attached to the first heat sink structure (e.g., heat sink structure 52). The first lens covers the first light source.

[0043] In step 910, a second lens (e.g., lens 108) is attached to a second heat sink structure (e.g., heat sink structure 54). The second lens covers a second light source. Each of the first and second lenses is at least partially defined by a lens outer arc (e.g., arc 120) having a lens outer arc length (e.g., length L2). The lens outer arc has first and second endpoints (e.g., points 128 and 130). Each of the first and second lenses is further at least partially defined by two lens diameters (e.g., diameters 122 and 124) extending from the first and second endpoints to points (e.g., point P1) different from the center point of the lighting fixture, respectively.

[0044] Also, unless clearly indicated otherwise, in any method claimed herein that includes two or more steps or acts, the order of the steps or acts of the method is not necessarily limited to the order in which the steps or acts of the method are recited.

[0045] All definitions, as defined and used herein, are to be understood to govern over dictionary definitions, definitions in incorporated documents by reference, and / or ordinary meanings of the defined terms.

[0046] The indefinite articles "a" and "an", as used in this specification and the claims, are to be understood to mean "at least one" unless clearly indicated otherwise.

[0047] When the phrase "and / or" is used in this specification and the claims, it should be understood to mean "either or both" of the elements so combined, i.e., elements that are present conjunctively in some cases and disjunctively in other cases. Multiple elements listed with "and / or" should be construed in the same manner, i.e., as "one or more" of the elements so combined. Other elements than those specifically recited by the "and / or" clause may optionally be present, whether or not they are related to those specifically recited elements.

[0048] When used in this specification and 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" is to be construed as inclusive, i.e., including at least one, but also optionally including additional items not recited, of several elements or of two or more of a list of elements. Only terms such as "only one of", "exactly one of", or "consisting of" when used in the claims, where the contrary is clearly indicated, refer to including exactly one of several elements or of a list of elements. In general, the term "or" when used in this specification is to be construed as indicating an exclusive alternative (i.e., "either one or the other, but not both") only when preceded by exclusive terms such as "any of", "one of", "only one of", or "exactly one of".

[0049] As used in this specification and the claims, the phrase "at least one" referring to a list of one or more elements means at least one selected from any one or more of the elements in the list of those elements, but is not necessarily limited to including at least one of each of the specifically listed elements in the list of those elements, and it should be understood that it does not exclude any combination of the elements in the list of those elements. This definition also allows for the possibility that elements other than those specifically identified in the list of elements referred to by the phrase "at least one" may optionally exist, whether or not they are related to those specifically identified elements.

[0050] In both the claims and the above specification, it should be understood that all transitional phrases such as "comprising", "including", "carrying", "having", "containing", "involving", "holding", "consisting of", etc. are non-limiting, i.e., they mean including but not limited to. Only transitional phrases such as "consisting of" and "consisting essentially of" are closed or semi-closed transitional phrases, respectively.

[0051] Although several embodiments of the invention have been described and illustrated herein, those skilled in the art will readily conceive of various other means and / or structures for performing the functions described herein and / or for obtaining one or more of the results and / or advantages thereof, and such variations and / or modifications are considered to be within the scope of the embodiments of the invention described herein. More generally, all parameters, dimensions, materials, and configurations described herein are intended to be exemplary, and those skilled in the art will readily understand that the actual parameters, dimensions, materials, and / or configurations will vary depending on the particular application in which the teachings of the invention are used. Those skilled in the art will be able to recognize, or ascertain, many equivalents to the specific embodiments of the invention described herein using only routine experimentation. Therefore, the above-described embodiments are presented by way of example only, and it should be understood that other embodiments of the invention may be practiced within the scope of the appended claims and their equivalents, other than those specifically described and claimed. The embodiments of the invention disclosed herein are directed to each individual feature, system, article, material, kit, and / or method described herein. Furthermore, any combination of two or more such features, systems, articles, materials, kits, and / or methods is included within the scope of the invention disclosed herein, provided such features, systems, articles, materials, kits, and / or methods are not mutually inconsistent.

Claims

1. A lighting fixture, an electronic device housing, and first and second heat sink structures coupled to the electronic device housing, each heat sink structure of the first and second heat sink structures being at least partially defined by a heat sink outer arc having first and second end points, and each heat sink structure further being at least partially defined by two heat sink diameters extending from the first and second end points, respectively, to a center point of the lighting fixture, the first and second heat sink structures; first and second light sources, and at least two lenses including a first lens attached to the first heat sink structure and covering the first light source and a second lens attached to the second heat sink structure and covering the second light source, each lens of the first and second lenses being at least partially defined by a lens outer arc having first and second end points, each lens further being at least partially defined by two lens diameters extending from the first and second end points, respectively, to a point different from the center point of the lighting fixture, and each lens further being at least partially defined by an inner arc extending between the two lens diameters, the at least two lenses; a ventilation channel disposed between the first and second heat sink structures, and comprising a lighting fixture.

2. The lighting fixture according to claim 1, wherein the point different from the center point of the lighting fixture is arranged along an imaginary line connecting the center point of the lighting fixture and the midpoint of the inner arc.

3. The lighting fixture according to claim 1, wherein the first lens is non-concentric with the first heat sink structure.

4. The lighting fixture according to claim 3, wherein the second lens is non-concentric with the second heat sink structure.

5. The lighting fixture according to claim 1, wherein the first or second lens is non-concentric with the lighting fixture. Claim 6 The first lens is attached to a first base of the first heat sink structure on a first surface facing outward when viewed from the electronic device housing, and the second lens is attached to a second base of the second heat sink structure on a second surface facing outward when viewed from the electronic device housing. The lighting fixture according to claim 1. Claim 7 The point is radially outward of the center point of the lighting fixture. The lighting fixture according to claim 1. Claim 8 A method for manufacturing a lighting fixture, the method comprising: providing an electronic device housing; coupling first and second heat sink structures to the electronic device housing, each heat sink structure of the first and second heat sink structures being at least partially defined by a heat sink outer arc having first and second end points, and each heat sink structure further being at least partially defined by two heat sink diameters extending from the first and second end points respectively to the center point of the lighting fixture; providing first and second light sources; attaching a first lens covering the first light source to the first heat sink structure; attaching a second lens covering the second light source to the second heat sink structure, each lens of the first and second lenses being at least partially defined by a lens outer arc having first and second end points, and each lens further being at least partially defined by two lens diameters extending from the first and second end points respectively to a point different from the center point of the lighting fixture, and the first lens or the second lens further being at least partially defined by an inner arc extending between the two lens diameters; providing a ventilation channel between the first and second heat sink structures; A method comprising the above. Claim 9 The method according to claim 8, wherein the point different from the center point of the lighting fixture is arranged along a virtual line connecting the center point of the lighting fixture and the midpoint of the inner arc.

10. The method according to claim 8, wherein the first lens is non-concentric with the first heat sink structure, and the second lens is non-concentric with the second heat sink structure.

11. The method according to claim 8, wherein the first or second lens is non-concentric with the lighting fixture.

12. The method according to claim 8, wherein the first lens is attached to the first base of the first heat sink structure on a first surface facing outward when viewed from the electronic device housing, and the second lens is attached to the second base of the second heat sink structure on a second surface facing outward when viewed from the electronic device housing.

13. The method according to claim 8, wherein the point different from the center point of the lighting fixture is radially outward of the center point of the lighting fixture.

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