EP2644982B1 - Agencement d'émission de lumière - Google Patents

Agencement d'émission de lumière Download PDF

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Publication number
EP2644982B1
EP2644982B1 EP13161035.4A EP13161035A EP2644982B1 EP 2644982 B1 EP2644982 B1 EP 2644982B1 EP 13161035 A EP13161035 A EP 13161035A EP 2644982 B1 EP2644982 B1 EP 2644982B1
Authority
EP
European Patent Office
Prior art keywords
diffuser
light emitting
led light
light source
emitting assembly
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.)
Active
Application number
EP13161035.4A
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German (de)
English (en)
Other versions
EP2644982A1 (fr
Inventor
Patrik Gassner
Bogna Ludwiczak
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.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
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Publication of EP2644982A1 publication Critical patent/EP2644982A1/fr
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    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/12—Combinations of only three kinds of 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
    • 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

  • the present invention relates to an arrangement for emitting light with at least one LED light source and a diffuser arranged in the light emission direction in front of the LED light source, wherein the light emission of the arrangement takes place via the diffuser.
  • LED lamps have hitherto frequently been used as light sources.
  • the progressive development of LEDs now leads more and more to the fact that, for example, fluorescent lamps are replaced by corresponding LEDs. This results, on the one hand, from the fact that LED light sources have considerable advantages in terms of lifetime and energy efficiency compared to conventional light sources.
  • the luminous intensity achievable with the help of LEDs is now sufficiently high that LED light sources can easily replace conventional light sources such as fluorescent lamps.
  • FIG. 1 is an example of a possible embodiment of such a slotlight lamp 1 shown in cross section, wherein the lamp 1 has an elongate housing 6 with a light exit opening. At the light exit opening a diffuser 3 is arranged, which closes the light exit opening. Accordingly, the light output of the lamp 1 via the diffuser 3rd
  • an LED light source 2 is further provided, which is placed in the housing 6 such that the diffuser 3 substantially in Light emission direction in front of the LED light source 2 is located.
  • a reflector 5 is also provided, which has two reflector wings 7 arranged laterally on the inside of the housing 6 the two reflector wings 7 are located substantially between the LED light source 2 and the diffuser 3.
  • this reflector wing 7 ensures that a majority of the light emitted from the LED light source 2 is directed to the diffuser 3, as well as the light emitted from the LED light source 2, which is not directly blasted in the direction of the diffuser 3, by Multiple reflections can be directed to the reflector wings 7 in the direction of the diffuser 3.
  • the reflector vanes 7 In order to achieve the highest possible efficiency or high efficiency of the luminaire 1, however, it is necessary for the reflector vanes 7 to have the highest possible reflector material in order to have the best possible reflection properties.
  • lamp 1 in the housing 6 additionally provided a transparent plate 4, which is arranged between the LED light source 2 and the diffuser 3. Through this it is achieved that even after the removal of the diffuser 3, a corresponding contact protection for the LED light source 2 is given.
  • lamp 1 is provided that the transparent plate 4 is held by the reflector 5.
  • the reflector 5 is in this case substantially U-shaped, wherein the LED light source 2 is arranged centrally within the U-shape and the opening of the U-shape in the direction of the diffuser 3 shows.
  • the reflector wings 7, which form the wings of the U-shape, are slightly curved in this case and connected to each other via a central region of the U-shape, wherein in the reflector wings 7 in the vicinity of the central region corresponding recesses or recesses are provided, in each case the ends of the transparent plate 4 are arranged, whereby the transparent plate 4 is held by the reflector 5.
  • the present invention is accordingly based on the object of further developing the arrangement outlined above for emitting light such that the efficiency or the efficiency is increased and at the same time ensuring that inadvertently touching the LED light source or the corresponding components can be prevented.
  • an arrangement for emitting light which has at least one LED light source and a diffuser arranged in the light emission direction in front of the LED light source, wherein the light emission of the arrangement takes place via the diffuser.
  • a lens assembly formed between the LED light source and the diffuser such that all the light emitted by the LED light source is substantially completely and uniformly directed to the diffuser.
  • reflector wings arranged laterally between the lens arrangement and the diffuser are also provided, which also possibly direct stray light to the diffuser.
  • the reflector wings are also arranged laterally next to the lens arrangement, wherein the lens arrangement is fixed by the reflector wings in the arrangement for emitting light.
  • the lens arrangement thus enables almost all of the light emitted by the LED light source to strike the diffuser and complete it uniformly illuminated without having to reflect a significant portion of the light emitted by the LED light source on a reflector, thereby ensuring that the light emitted from the LED light source is efficiently and with high efficiency in a nearly complete and uniform manner over the Diffuser can be dispensed.
  • the reflector wings may be part of a substantially U-shaped reflector, wherein the LED light source is arranged centrally within the U-shape and shows the opening of the U-shape in the direction of the diffuser.
  • the lens arrangement is formed in cross-section substantially frusto-conical, wherein it is the LED light source facing end portion to the top surface of the truncated cone and at the end facing the diffuser to the base of the truncated cone.
  • the end portion of the truncated cone facing the LED light source may in this case have a recess with a bottom surface and two side surfaces, wherein the LED light source is arranged substantially in the recess, such that the bottom surface and the side surfaces of the light entry surface of the lens assembly for that of LED light emitted, the bottom surface convex and the side surfaces may be concave.
  • the end region of the truncated cone facing the diffuser can be substantially planar and form the light exit surface of the lens arrangement and can be configured such that the light leaving the lens arrangement is slightly widened.
  • the two lateral lateral surfaces of the truncated cone can be curved and designed to be totally reflective.
  • This special lens arrangement permits efficient collection, bundling and uniform distribution of the light emitted by the LED light source to an underlying or subsequent diffuser.
  • the end region of the truncated cone facing the diffuser is laterally arranged, in particular multiply unwound arms for mounting the lens assembly in the light emitting device.
  • the arrangement for emitting light is elongated and has a plurality of longitudinally arranged LED light sources. It can then be provided that a common lens arrangement is provided for all LED light sources, which has the same cross section over the entire length.
  • the lens arrangement influences the uniform illumination of the diffuser, in particular over the width of the light exit opening, since over the entire length the lens arrangement has the same cross section. Accordingly, the light emitted by the LED light source is essentially only transversely affected and thus in one plane.
  • each lens arrangement is associated with at least one LED light source.
  • each LED light source is assigned a single lens arrangement, which in addition to the transverse direction also an influence in the longitudinal direction and thus in two planes is possible.
  • the light may then be influenced such that it is directed substantially completely towards the diffuser in the transverse direction and, on the contrary, tends to be distributed widely in the longitudinal direction. Due to this rather broad distribution, a better mixing of the light in the longitudinal direction is achieved, whereby the influence of individual LED failures or different color or luminous flux densities (deviations and consequent irregularities) can be minimized.
  • the arrangement for emitting light has a housing with a light exit opening, wherein in the Housing the at least one LED light source and the lens assembly are arranged and the diffuser closes the light exit opening.
  • FIG. 1 shows, as already explained above, by way of example, an already known from the prior art Slotlight lamp 1 of the applicant.
  • a transparent plate 4 is provided between the LED light source 2 and the diffuser 3, which serves in particular as protection against contact.
  • the light guide of the light emitted by the LED light source 2 essentially takes place through the reflector vanes 7 of the reflector 5.
  • the reflector vanes 7 have corresponding recesses or recesses in which the ends of the transparent plate 4 are arranged and, accordingly, by the reflector 5 are kept.
  • a significant portion of the light emitted from the LED light source 2 is directed by multiple reflections on the reflector wings 7 on the diffuser 3, whereby the reflector wings 7 must have a correspondingly high-quality reflector material.
  • FIG. 2 shows a corresponding light fixture 11 according to the invention or arrangement for emitting light, which in turn has a diffuser 3 and an LED light source 2.
  • lamp 1 is also in the in FIG. 2 shown light source 2, the LED light source 2 disposed within a housing 6, wherein the diffuser 3, the light exit opening of the housing 6 closes.
  • the lamp 11 has a reflector 5 with two arranged laterally within the housing 6 reflector wings 7, wherein the lens assembly 14 is secured or held in the same recesses or recesses in which the ends of the transparent plate 4 in FIG. 1 be held or attached.
  • the lens arrangement 14 has two multiply angled arms which are each arranged laterally on the main body of the lens arrangement 14.
  • the main body of the lens assembly 14 is in this case frusto-conical, wherein it is the LED light source 2 end portion facing the top surface of the truncated cone and at the end facing the diffuser 3 to the base of the truncated cone and the multi-angled arms at the diffuser 3 facing end portion of the truncated cone are arranged laterally.
  • the end region of the truncated cone facing the LED light source 2 additionally has a depression, wherein the LED light source 2 is arranged substantially in the depression.
  • the depression consists essentially of a bottom surface and two side surfaces which correspondingly form the light entry surface of the lens arrangement 14 for the light emitted by the LED light source 2.
  • the bottom surface is in this case formed as a convex, spherical lens having a radius of, for example, 13 mm, wherein the geometry is selected such that the light emitted by the LED light source 2 strikes the bottom surface, for example in an angle range of -50 ° to + 50 ° and is bundled by the convex shape.
  • This light then leaves the lens arrangement 14 via the end region of the truncated cone facing the diffuser 3, this end region being substantially planar and forming the light exit surface of the lens arrangement 14.
  • this end region is also designed such that the light leaving the lens arrangement 14 is slightly widened or broken, for example in one Angle range of -35 ° to 35 °, such that this proportion of light is distributed uniformly over the entire width of the diffuser 3.
  • FIG. 3 is the in FIG. 2 illustrated lamp 11 according to the invention shown with corresponding light rays, where in particular the light emitted from the LED light source 2 is shown, which strikes the bottom surface of the recess. Due to the convex shape of the bottom surface, the light is first bundled, and then slightly expanded again on leaving the lens arrangement 14 via the end region facing the diffuser 3, so that the light leaving the lens arrangement 14 leaves the diffuser 3 illuminated as completely and evenly as possible.
  • the side surfaces of the recess are in contrast formed as a concave, spherical lens having a radius of for example about 4.5 mm, wherein it is provided that these side surfaces emitted by the LED light source 2 light in an angular range, for example, from -90 ° to -50 and from + 50 ° to + 90 °.
  • the LED light source 2 can in this case be arranged in the recess such that it is located in the center of the circle of the two side surfaces, so that no change in direction of the light is produced.
  • the side surfaces then transmit the light radially (i.e., without diffraction) to the lateral lateral surfaces of the truncated cone.
  • These lateral lateral surfaces are in this case curved and formed totally reflecting, so that the directed from the side surfaces to the lateral surfaces of light is deflected by total reflection, such that after leaving the lens assembly 14 via the diffuser 3 end facing the light also illuminates the diffuser completely and evenly , It should be noted that this light is again slightly widened by refraction through the end region facing the diffuser.
  • FIG. 4 Now corresponding light beams are shown, which pass from the LED light source 2 in the lens assembly 14 via the side surfaces of the recess.
  • FIG. 4 again shows the in FIG. 2 shown lamp 11.
  • Both the light entering the lens assembly 14 via the bottom surface of the recess and the light entering the lens assembly 14 via the side surfaces of the recess Lens assembly 14 entering light is influenced by the lens assembly 14 such that it after leaving the lens assembly 14, the diffuser 3 evenly and completely illuminated, resulting in a higher efficiency and a better efficiency.
  • the design of the lens assembly 14 and in particular also by the attachment in the same recesses or recesses, the lens assembly 14, as well as the transparent plate 4, serves as protection against contact for the LED light source 2 and the corresponding components and accordingly accidental contact with these parts when opening the diffuser 3 can be largely prevented.
  • the known slotlight luminaires are elongate luminaires which have a plurality of LED light sources distributed over the length.
  • a common lens arrangement is provided for all LED light sources, which has an unchanged cross-section in the longitudinal direction.
  • the light is then essentially influenced only in the transverse direction and thus only in one plane.
  • a plurality of lens arrangements could also be provided, for example a lens arrangement for each LED light source.
  • the light can be influenced both in the transverse direction and in the longitudinal direction and thus in several planes.
  • a very wide distribution or generation of very flat light may be desired in order to achieve even better light mixing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (12)

  1. Agencement d'émission de lumière (11) comportant au moins une source lumineuse à DEL (2) et un diffuseur (3) disposé dans la direction d'émission de lumière en face de la source lumineuse à DEL (2), dans lequel l'émission de lumière de l'agencement (11) se déroule par l'intermédiaire du diffuseur (3) et un agencement de lentilles (14), prévu entre la source lumineuse à DEL (2) et le diffuseur (3) est configuré et disposé entre la source lumineuse à DEL (2) et le diffuseur (3) de manière à ce que la lumière émise de la source lumineuse à DEL (2) soit essentiellement complètement et uniformément orientée vers le diffuseur (3), et dans lequel des ailes de réflecteur (7) sont prévues latéralement entre l'agencement de lentilles (14) et le diffuseur (3), caractérisé en ce que les ailes de réflecteur (7) sont aussi disposées latéralement à proximité de l'agencement de lentilles (14) et l'agencement de lentilles (14) est fixé par les ailes de réflecteur (7) dans l'agencement d'émission de lumière (11).
  2. Agencement d'émission de lumière selon la revendication 1, caractérisé en ce que les ailes de réflecteur (7) font partie d'un réflecteur essentiellement en forme de « U » (5), dans lequel la source lumineuse à DEL (2) est disposée centralement à l'intérieur de la forme en « U » et l'ouverture des points en forme de « U » est tournée vers le diffuseur (3).
  3. Agencement d'émission de lumière selon l'une des revendications précédentes, caractérisé en ce que l'agencement de lentilles (14) est configuré en section transversale essentiellement selon la forme d'un cône tronconique, dans lequel la section terminale située face à la source lumineuse à DEL (2) est la surface supérieure du cône tronconique et la section terminale située face au diffuseur (3) est la surface de base du cône tronconique.
  4. Agencement d'émission de lumière selon la revendication 3, caractérisé en ce que la section terminale du cône tronconique située face à la source lumineuse à DEL (2) possède une indentation avec une surface inférieure et deux surfaces latérales, dans lequel la source lumineuse à DEL (2) est essentiellement disposée dans l'indentation de manière à ce que la surface inférieure et les surfaces latérales forment la surface d'entrée de lumière de l'agencement de lentilles (14) pour la lumière émise par la source lumineuse à DEL (2).
  5. Agencement d'émission de lumière selon la revendication 4, caractérisé en ce que la surface inférieure est convexe et les surfaces latérales sont concaves.
  6. Agencement d'émission de lumière selon l'une des revendications de 3 à 5, caractérisé en ce que la section terminale du cône tronconique située face au diffuseur (3) est essentiellement plane et forme la surface de sortie de lumière de l'agencement de lentilles (14) et est ainsi configurée de manière à ce que la lumière quittant l'agencement de lentilles (14) soit légèrement étendue.
  7. Agencement d'émission de lumière selon l'une des revendications de 3 à 6, caractérisé en ce que les deux surfaces latérales enveloppantes du cône tronconique sont configurées incurvées et totalement réflectives.
  8. Agencement d'émission de lumière selon l'une des revendications de 3 à 7, caractérisé en ce que la section terminale du cône tronconique située face au diffuseur (3) possède des bras, en particulier à multiples angles droits, disposés latéralement pour fixer l'agencement de lentilles (14) dans l'agencement d'émission de lumière (11).
  9. Agencement d'émission de lumière selon l'une des revendications précédentes, caractérisé en ce que l'agencement d'émission de lumière (11) est configuré oblong et possède plusieurs sources lumineuses à DEL (2) disposées dans une direction longitudinale.
  10. Agencement d'émission de lumière selon la revendication 9, caractérisé en ce qu'un agencement de lentilles mutuelles (14) est prévu pour toutes les sources lumineuses à DEL (2) ayant la même section transversale sur toute la longueur.
  11. Agencement d'émission de lumière selon la revendication 9, caractérisé en ce que plusieurs agencements de lentilles (14) sont prévus, dans lequel une source lumineuse à DEL (2) est attribuée à chaque agencement de lentilles (14).
  12. Agencement d'émission de lumière selon l'une des revendications précédentes, caractérisé en ce que l'agencement d'émission de lumière (11) possède un logement (6) disposant d'une ouverture de sortie de lumière, dans lequel l'au moins une source lumineuse à DEL (2) et l'agencement de lentilles (14) sont disposés dans le logement (6) et le diffuseur (3) ferme l'ouverture de sortie de lumière.
EP13161035.4A 2012-03-29 2013-03-26 Agencement d'émission de lumière Active EP2644982B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012205067A DE102012205067A1 (de) 2012-03-29 2012-03-29 Anordnung zur Lichtabgabe

Publications (2)

Publication Number Publication Date
EP2644982A1 EP2644982A1 (fr) 2013-10-02
EP2644982B1 true EP2644982B1 (fr) 2015-09-09

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EP13161035.4A Active EP2644982B1 (fr) 2012-03-29 2013-03-26 Agencement d'émission de lumière

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DE (1) DE102012205067A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013226181B4 (de) 2013-12-17 2021-01-28 Zumtobel Lighting Gmbh Optisches Element, sowie Anordnung zur Lichtabgabe
DE102020208079A1 (de) 2020-06-30 2021-12-30 Robert Bosch Gesellschaft mit beschränkter Haftung Beleuchtungseinheit zum Beleuchten eines oder mehrerer Fahrzeuginsassen
DE102020208091A1 (de) 2020-06-30 2021-12-30 Robert Bosch Gesellschaft mit beschränkter Haftung Beleuchtungseinheit zum Beleuchten eines Fahrzeuginnenraums eines Fahrzeugs
WO2023084101A1 (fr) 2021-11-15 2023-05-19 Zumtobel Lighting Gmbh Élément optique et appareil d'éclairage équipé de celui-ci
EP4180712A1 (fr) 2021-11-15 2023-05-17 Zumtobel Lighting GmbH Cadre d'étanchéité pour une optique d'éclairage

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Publication number Priority date Publication date Assignee Title
US7425077B2 (en) * 2005-05-02 2008-09-16 Pelton & Crane LED-powered dental operatory light
US7918583B2 (en) * 2006-08-16 2011-04-05 Rpc Photonics, Inc. Illumination devices
DE102007002403B4 (de) * 2007-01-17 2016-03-03 Osram Gmbh Beleuchtungsanordnung, Mehrfach-Lichtmodul, Leuchte und deren Verwendung
DE202009013230U1 (de) * 2009-09-16 2011-02-03 Ledon Lighting Jennersdorf Gmbh LED-Leuchtenelement zur Beleuchtung eines Lichtkastens mit homogener Lichtverteilung
DE102010014289B4 (de) * 2010-04-08 2014-03-27 Trilux Gmbh & Co. Kg Leuchtmodul und Leuchte mit Leuchtmodul
DE202010008480U1 (de) * 2010-09-08 2011-12-09 Zumtobel Lighting Gmbh LED-Leuchte zur Erzeugung von weißem Licht

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DE102012205067A1 (de) 2013-10-02

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