EP3147559A1 - Jalousie für led-beleuchtungsvorrichtungen - Google Patents

Jalousie für led-beleuchtungsvorrichtungen Download PDF

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Publication number
EP3147559A1
EP3147559A1 EP16191180.5A EP16191180A EP3147559A1 EP 3147559 A1 EP3147559 A1 EP 3147559A1 EP 16191180 A EP16191180 A EP 16191180A EP 3147559 A1 EP3147559 A1 EP 3147559A1
Authority
EP
European Patent Office
Prior art keywords
louver
light
light fixture
fins
leds
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16191180.5A
Other languages
English (en)
French (fr)
Other versions
EP3147559B1 (de
Inventor
Nicholas Blockley
Christopher Wilkes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Holophane Europe Ltd
Original Assignee
ABL IP Holding LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABL IP Holding LLC filed Critical ABL IP Holding LLC
Publication of EP3147559A1 publication Critical patent/EP3147559A1/de
Application granted granted Critical
Publication of EP3147559B1 publication Critical patent/EP3147559B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/06—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using crossed laminae or strips, e.g. grid-shaped louvers; using lattices or honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/04—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/101—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/12—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • Embodiments of the present invention relate to a louver that may be installed on or within a light fixture containing a light emitting diode (LED) light engine to better distribute and diffuse light.
  • LED light emitting diode
  • LED light engines which may be fitted as original equipment or installed as retrofit kits, are increasingly popular due to their long life and efficiency compared to other light sources. LED light engines also have a form factor that is different from traditional light sources. For example, some LED light engines may include a number of small LEDs mounted to a printed circuit board (PCB). Because of this form factor, with a flat surface and many point-like sources of light, traditional housings, reflectors, and lenses may not provide optimal scattering, diffusion, refraction, and/or reflection of light coming from an LED light engine. As a result, LED light fixtures or retrofit kits may distribute light unevenly, leading to bright spots, dark spots, or areas of high glare. In particular, high angle light emission from LED light engines may not be effectively reflected, refracted, or diffused and lead to glare or other undesirable lighting patterns that may be unpleasant or annoying to a viewer.
  • PCB printed circuit board
  • a louver may be installed on or within a light fixture containing an LED light engine to better distribute and diffuse light.
  • the louver includes a number of individual fins that define apertures within the louver.
  • the louver is positioned sufficiently close to the LEDs so that high angle light emission from the LEDs may be blocked, reflected, refracted, or otherwise managed.
  • Embodiments of the present invention relate to a louver that may be installed on or within a light fixture containing an LED light engine to better distribute and diffuse light.
  • Figures 1 and 2 illustrate one embodiment of a louver 10 for installation in a fixture housing 12 of a light fixture 20.
  • the light fixture 20 further includes a light engine 22 provided in the fixture housing 12 to generate light.
  • the light engine 22 includes a printed circuit board (“PCB") 18 onto which LEDs 24 are mounted.
  • the area above the light engine 22 is the non-light emitting side 40 of the fixture 20 (because light is not directed toward that region of the light fixture 20) whereas the area below the light engine 22 is the light emitting side 42 of the fixture 20 from which light is emitted from the light fixture 20.
  • the louver 10 includes a number of individual fins 14 that define apertures 16 (see Figure 3 ) within the louver 10.
  • the louver 10 is designed to be mounted onto the PCB 18 of the light engine 22 such that the apertures 16 of the louver 10 and the LEDs 24 on the PCB 18 align (i.e., light emitted from the LEDs 24 is able to pass through the apertures 16 of the louver 10).
  • the width of the louver 10 can be narrowed or otherwise shaped or configured so as to accommodate other components (such as electrical components) on the PCB 18.
  • Different constructions or arrangements of the louver 10 may also be used.
  • the louver 10 may be attached directly to the fixture housing 12, or other hardware associated with an assembled lighting fixture 20. Any arrangement or attachment of the components of the lighting fixture 20 may be used, so long as the louver 10 is positioned sufficiently close to the LEDs 24 so that high angle light emission from the LEDs 24 may be blocked, reflected, refracted, or otherwise managed.
  • the louver 10 may be constructed with one or more locating features, including locating pins, recesses, or other features that are designed to mate with other features of the PCB 18, fixture housing 12, or other components of the light engine 22 and/or lighting fixture 20.
  • the louver 10 may have holes 28 for fasteners 26, such as screws, rivets, bolts, or the like, that secure or affix the louver 10 to the PCB 18, fixture housing 12, or other components of the LED light engine 22 and/or lighting fixture 20.
  • alternative methods of securing the louver 10 into the lighting fixture 20 may be employed.
  • the louver 10 may be snapped, glued, or otherwise molded onto the PCB 18, fixture housing 12, or any other components of the lighting fixture 20 and/or LED light engine 22.
  • the louver 10 may be designed to work alone, or in conjunction with other light management components in the lighting fixture 20.
  • the louver 10 may be the only reflecting, refracting, or light directing device necessary in certain applications.
  • the louver 10 may be designed to work with other light management components such as a lens 30, reflector, or other light directing features of a light fixture 20.
  • FIG 3 shows an embodiment of a louver 10 in isolation
  • the louver 10 comprises the plurality of apertures 16 separated by fins 14.
  • the individual apertures 16 and corresponding fins 14 are configured such that, when installed on the PCB 18 or in the lighting fixture 20, the apertures 16 may align with individual or small groupings of LEDs 24.
  • the louver 10 may be a long, rectangular component designed for a PCB 18 with one, two, or more rows of LEDs 24.
  • the louver 10 may take on any shape and/or the apertures 16 provided on the louver 10 in any number, location, and orientation as necessary for a particular PCB 18 or lighting fixture 20.
  • the louver 10 may be square, rectangular, circular, or any other shape as desired or required for a particular PCB 18 or lighting fixture 20.
  • Multiple louvers 10 may also be used with a single fixture 20, light engine 22, or PCB 18.
  • the louver 10 may be manufactured from a variety of materials including polymeric materials, metals, composites, or any other material that may be shaped or formed into the necessary geometry.
  • the louver 10 may be a stamped metal component or injection molded from a polymeric material.
  • the louver 10 may also be constructed of multiple smaller components that are assembled together, as with fasteners or adhesives, to form the full-size part. Coatings may be used to enhance or tailor the reflective, refractive, or specular properties of the louver 10.
  • the louver 10 may be painted or otherwise colored for aesthetic purposes.
  • Figures 4 and 5 are enlarged sectional and perspective views, respectively, of embodiments of the louver 10.
  • the base of the louver 10 may be flush with the emitting surface of the LEDs 24. This configuration may provide an efficient use of the space between the LEDs 24 and provides clearance for any solder points.
  • the base of the louver 10 and the top emitting surface of the LEDs 24 are not flush.
  • the sides of the base defining the apertures 16 may extend below the LEDs 24.
  • the light control properties of the louver 10 may be at least partially dictated by fin height H, fin separation or pitch S, the shape/profile of the fins 14, and the size of louver apertures 16. Altering any of these variables permits tailoring the light control properties of the louver 10 to a particular application.
  • the louver apertures 16 may be of any size or shape.
  • the size of the louver apertures 16 may be determined by the fin pitch S and the fin thickness at the a base 41 of the fins 14. Closer fin spacing (i.e., smaller fin pitch S values) and narrower louver apertures 16 may restrict direct emission of light from the LEDs 24 to lower angles, and prevent more high angle emissions. In contrast, spacing the fins 14 farther apart (i.e., larger fin pitch S values) and wider louver apertures 16 may place the cutoff for high angle emissions at a greater angle such that more high angle light is emitted from the fixture 20. In some cases, smaller fin spacing may restrict the height that can be manufactured to the extent that the angle of light that can be influenced is restricted. A larger spacing may allow an increased influence over the light emission, but at the expense of compactness of the LED light engine.
  • Fin height H may also influence the angle of light emission. Greater fin heights H may restrict direct light emissions from the LEDs 24 to lower angles while lower fin heights H may increase the angle of emission.
  • the effectiveness and extent of the light control properties of the louver 10 may also be characterized by the ratio of the fin height H to the fin pitch S (i.e. the ratio of H:S), and by the location of individual LEDs 24 within the louver apertures 16. For example and without limitation, if a particular LED 24 is offset with respect to the louver aperture 16, the light control properties of the louver 10 may be asymmetrical. Fin height H, fin pitch S, and the location of individual LEDs 24 within the fin aperture 16 may determine what percentage of light emitted from the LED 24 may be influenced by the louver 10.
  • the ratio of H:S, as well as other characteristics of the fins 14 and apertures 16, may be adjusted such that the cutoff angle from horizontal may be from about 0 degrees to about 90 degrees, such as from about 10 degrees to about 75 degrees, such as from about 15 degrees to about 70 degrees, such as from about 20 degrees to about 65 degrees, such as from about 25 degrees to about 60 degrees, such as from about 30 degrees to about 55 degrees, or various other suitable angles.
  • the shape and optical properties of the fins 14 may further influence how the affected light emissions may be scattered, reflected, or otherwise directed.
  • Figure 4 illustrates one non-limiting example of a high angle ray of light 43 emanating from an LED 24 and through the louver aperture 16 that may strike a fin 14. This ray of light 43 may then be redirected, reflected, refracted, or diffused depending on the shape and any surface coatings or other optical characteristics of the louver fins 14.
  • Some individual fins 14 may have two faces 32 and 62, and a crown 34 between the two faces 32 and 62.
  • the faces 32 and 62 and crown 34 may have profiles or shapes selected to reflect or refract light in a particular direction, distribution, or illumination pattern.
  • the fin faces 32 and 62 may be of any curved shape (including convex and concave) as well as planar.
  • the face 32 of one fin 14 may be different than the face 62 of the fin 14.
  • Figure 5 shows fins 14 where face 32 is concavely curved and face 62 is convexly curved.
  • the fin crown 34 may be curved, angled, or squared off.
  • Surface coatings applied to the louver 10 or fins 14 may further tailor the optical properties of the louver 10. Reflective, refractive, specular, or diffusive coatings may be applied to the louver 10 or individual fins 14 to influence the direction and intensity of light in the illumination pattern.
  • the fins 14 illustrated in Figure 4 have a substantially parabolic shape and extend substantially perpendicular to a louver base 36 at regular intervals. However, in some embodiments, the fins 14 may have other shapes or profiles. Figures 6A-F illustrate various other non-limiting examples of shapes or profiles of the fins 14. A fin profile may be symmetrical or asymmetrical and not all fins 14 on a louver 10 need be identical. The fins 14 may also be spaced at regular or irregular intervals on the louver base 36.
  • the fins 14 may be shaped to extend at least partially over one or more LEDs 24 mounted on the PCB 18, light fixture 20, and/or light engine 22 so as to create, for example, an asymmetric distribution (see, e.g., Figures 6B, 6C ).
  • the fins 14 extending from the louver 10 may form a grid pattern on the PCB 18.
  • Such a configuration may be suitable when multiple rows of LEDs 24 extend along the length of the PCB 18.
  • one or more longitudinal rib(s) may extend down the length of the louver 10 and divide the fins 14, thus creating more discrete apertures 16 to accommodate the rows of LEDs 24.
  • any other geometric or curvilinear shape of the fins 14 is contemplated to achieve the desired light distribution from the fixture 20.
  • Individual louver fins 14 may be molded or formed with, or mounted to, the louver base 36 at any angle to influence the directionality and light distribution light from the louver 10.
  • the particular characteristics of any individual fin 14 and its associated louver aperture 16, including but not limited to, its height H, angle with respect to the louver base 36, separation (i.e., pitch S) from adjacent fins 14, fin shape, profile of the fin face 32, profile of the fin crown 34, applied coatings, or offset with respect to individual LEDs 24 may differ with respect to any other individual fin 14 on the louver 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
EP16191180.5A 2015-09-28 2016-09-28 Jalousie für led-beleuchtungsvorrichtungen Active EP3147559B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US201562284359P 2015-09-28 2015-09-28

Publications (2)

Publication Number Publication Date
EP3147559A1 true EP3147559A1 (de) 2017-03-29
EP3147559B1 EP3147559B1 (de) 2019-01-30

Family

ID=57083138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16191180.5A Active EP3147559B1 (de) 2015-09-28 2016-09-28 Jalousie für led-beleuchtungsvorrichtungen

Country Status (2)

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EP (1) EP3147559B1 (de)
GB (1) GB2543418B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10101005B2 (en) 2016-08-03 2018-10-16 Abl Ip Holding Llc Light shield
KR20220001837U (ko) * 2021-01-19 2022-07-26 이리코조명 주식회사 눈부심 방지 조명등
KR20220104852A (ko) * 2021-01-19 2022-07-26 이리코조명 주식회사 눈부심 방지 조명등 및 이의 제조방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2051001A2 (de) * 2007-10-17 2009-04-22 LSI Industries, Inc. Straßenbeleuchtung und Verwendungsverfahren
DE202009002978U1 (de) * 2009-03-04 2010-07-22 Zumtobel Lighting Gmbh Optisches Element für LED-Leuchten
US7934851B1 (en) * 2008-08-19 2011-05-03 Koninklijke Philips Electronics N.V. Vertical luminaire
US20130107527A1 (en) * 2011-11-01 2013-05-02 Lsi Industries, Inc. Luminaires and lighting structures

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101614367B (zh) * 2008-06-25 2011-12-28 富准精密工业(深圳)有限公司 发光二极管灯具
JP5368774B2 (ja) * 2008-11-11 2013-12-18 パナソニック株式会社 照明器具
CA2898902A1 (en) * 2014-07-30 2016-01-30 Abl Ip Holding Llc Led light module and method for installing same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2051001A2 (de) * 2007-10-17 2009-04-22 LSI Industries, Inc. Straßenbeleuchtung und Verwendungsverfahren
US7934851B1 (en) * 2008-08-19 2011-05-03 Koninklijke Philips Electronics N.V. Vertical luminaire
DE202009002978U1 (de) * 2009-03-04 2010-07-22 Zumtobel Lighting Gmbh Optisches Element für LED-Leuchten
US20130107527A1 (en) * 2011-11-01 2013-05-02 Lsi Industries, Inc. Luminaires and lighting structures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10101005B2 (en) 2016-08-03 2018-10-16 Abl Ip Holding Llc Light shield
KR20220001837U (ko) * 2021-01-19 2022-07-26 이리코조명 주식회사 눈부심 방지 조명등
KR20220104852A (ko) * 2021-01-19 2022-07-26 이리코조명 주식회사 눈부심 방지 조명등 및 이의 제조방법

Also Published As

Publication number Publication date
GB2543418A (en) 2017-04-19
GB201616459D0 (en) 2016-11-09
GB2543418B (en) 2018-03-14
EP3147559B1 (de) 2019-01-30

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