EP2603732B1 - Agencement pour émission de lumière comportant un élément de guidage lumineux et un réflecteur - Google Patents

Agencement pour émission de lumière comportant un élément de guidage lumineux et un réflecteur Download PDF

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Publication number
EP2603732B1
EP2603732B1 EP11757786.6A EP11757786A EP2603732B1 EP 2603732 B1 EP2603732 B1 EP 2603732B1 EP 11757786 A EP11757786 A EP 11757786A EP 2603732 B1 EP2603732 B1 EP 2603732B1
Authority
EP
European Patent Office
Prior art keywords
light
guiding element
reflector
cylinder
arrangement
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
EP11757786.6A
Other languages
German (de)
English (en)
Other versions
EP2603732A1 (fr
Inventor
Burkhard Von Kloeden
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 Germany
Original Assignee
Zumtobel Lighting GmbH Germany
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 Zumtobel Lighting GmbH Germany filed Critical Zumtobel Lighting GmbH Germany
Publication of EP2603732A1 publication Critical patent/EP2603732A1/fr
Application granted granted Critical
Publication of EP2603732B1 publication Critical patent/EP2603732B1/fr
Active legal-status Critical Current
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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
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F21V5/005—Refractors for light sources using microoptical elements for redirecting or diffusing light using microprisms
    • 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
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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 according to the preamble of claim 1, which has at least one substantially punctiform light source, wherein the light emission by means of a light source upstream of the light-guiding element and a light-guiding element surrounding the reflector.
  • the punctual light source used is in particular an LED.
  • LEDs are increasingly being used in lighting technology, as they have numerous advantages over conventional light sources such as fluorescent lamps or light bulbs.
  • One advantage of LEDs for example, is that they emit their light predominantly in the direction in which the actual light output is to take place in a luminaire construction, ie in the direction of the light exit.
  • targeted influencing of the emitted light beams for directing the light is only possible by positioning specific optical elements directly in the region of the light emission of the LEDs. Due to the high direct component of the light emitted by LEDs and the low influenceability inevitably results in a certain amount of scattered light, which has a very disturbing effect, especially in narrow-beam distributions.
  • LED modules in which multicolor LEDs are used for example in the case of RGB modules
  • a specific color mixture is required in order ultimately to achieve homogeneous light output with a desired mixed color.
  • the present invention is accordingly based on the object, a novel concept for influencing the light output in lighting arrangements with substantially point-shaped light sources, in particular LEDs, indicate, with the help of which the above-mentioned objectives are achieved.
  • an effective influencing of the light output should be possible, on the other hand should be achieved in the case of using different colored light sources effective color mixing.
  • the solution according to the invention is based on the use of a specially designed light-guiding element, by means of which, on the one hand, an effective light steering is made possible, on the other hand, the mixing of the light emitted by the light source (s) is promoted.
  • This special light-guiding element is designed substantially cylinder-like, wherein an end face of the cylinder forms a light entry surface. One of the light entry surface opposite side of the cylinder is then at least partially aligned with respect to a longitudinal axis of the cylinder. It is thus transparent to some of the light and reflective for another part of the light, in which case the reflected portion of the light is emitted via the lateral surface of the cylinder, which is provided with structures for light extraction, to a reflector surrounding the light guide element.
  • This special design makes it possible to effectively use all the components of the light emitted by the light source.
  • an arrangement for emitting light which has at least one substantially punctiform light source, a light source in the emission direction of a light-guiding element made of a transparent material and a reflector surrounding the light guide element, wherein according to the invention, the light guide element is substantially cylindrical, wherein an end face of Cylinder forms a light entrance surface and the light inlet surface opposite side of the cylinder is at least partially inclined relative to a longitudinal axis of the cylinder such that it is transparent to a part of the light and reflective for another part of the light, and wherein the lateral surface of the cylinder with structures for Light extraction is provided.
  • LEDs are used, which may in particular be different colored LEDs.
  • the light entry surface of the light-guiding element is provided with a scattering structure, in particular a microstructure.
  • an optical element for example a foil, which has a corresponding scattering structure, in particular a microstructure, can also be provided in the region of the light entry surface.
  • the light exit surface of the light-guiding element is formed by a lateral surface a formed in the light guide element extending recess, wherein the recess is conical.
  • the cone of the cone can be selected. This can be in particular in the range between 0 ° and 45 °.
  • the light entry surface of the light-guiding element is provided with a scattering structure, or a film with a scattering structure is arranged upstream of the light entry surface of the light-directing element.
  • an asymmetrical light output can also be provided.
  • the light incident surface opposite surface of the light-guiding element, on the one hand, a refraction of light and on the other hand, a reflection takes place, preferably formed by an oblique face.
  • the reflector surrounding the light guide element according to the invention is preferably in the form of a pot. Again, the shape of the reflection surface can be changed in order to influence the light output in the desired manner.
  • the inventive arrangement makes it possible to influence the emission of light from point light sources, in particular LEDs, in a simple but effective manner.
  • luminaires with different light emission characteristics can be achieved in a simple manner, without being distinguishable from the outside at first sight.
  • Arrangement according to the invention serves to direct the light which is emitted by a plurality of punctiform light sources, in particular by LEDs.
  • LEDs in particular, differently colored LEDs - for example in the colors red, green and blue - are used in order to achieve, by controlling the intensities of the different colors, mixed light of almost any color locus or any desired color temperature.
  • the arrangement 1 can be used, for example, in so-called LED emitters.
  • Essential elements of the arrangement 1 according to the invention are on the one hand a pot-shaped reflector 2 and on the other hand a transparent light-guiding element 10, which is arranged approximately in the region of the center of the reflector 2.
  • the embodiment of the light-guiding element 10 will be described in detail below. Both elements, ie reflector 2 and light-directing element 10, are held by an annular ausgestaltetes holding element 3, via which at the same time also an attachment to or in which - not shown - housing of an LED emitter.
  • the central element of the arrangement according to the invention is the transparent light-guiding element 10, whose configuration is described below with reference to FIGS. 2 to 5 will be explained in more detail.
  • the light-guiding element 10 which consists of a light-transmitting material, preferably of a transparent plastic, is designed essentially as a cylinder.
  • the rear side of the cylinder forms a light entry surface 11 and accordingly faces the light sources.
  • a disc-shaped recess 13 is formed, which corresponds to the sectional view of FIG. 5 the recording of the LEDs 5 shown here schematically serves.
  • the light of the LEDs 5 is then coupled into the light-directing element 10 via the rear side or the corresponding light entry surface 11.
  • the light entry surface 11 is provided with a light-scattering microstructure.
  • the light-scattering effect of this structure achieves a uniform distribution of the light rays without extreme discontinuities. At the same time this ensures the desired color mixing.
  • a flat optical element for example a foil with a corresponding microstructure appeal. Also in this way, the above-mentioned uniform distribution of the light and a color mixing is achieved.
  • the forwarding of the light coupled into the light-directing element 10 then takes place essentially in two different ways, which are shown schematically in the sectional view of FIG FIG. 5 are shown.
  • the surface 15 is formed by a extending into the light guide member 10 recess 16, which is cone-shaped is trained.
  • the surface 15 is thereby formed inclined with respect to the longitudinal axis I of the cylinder and is formed by the lateral surface of the recess 16.
  • both the light rays emitted by the LEDs 5 in the direction of light emission, that is to say downwards, and the light rays emitted laterally, that is to say the scattered light of the LEDs 5, are emitted towards the bottom side.
  • the light distribution can be influenced by the choice of the opening angle of the conical recess 16.
  • the cone of the cone can be in the range between 0 ° and 45 °.
  • the structure 19 provided there is preferably configured in such a way that the Lichtlenkelement 10 laterally leaving rays are emitted as perpendicular to the longitudinal axis I as possible. This ensures that the light can be effectively deflected by the reflector 2 in the light emission direction.
  • This preferred lateral light emission is achieved in that the structure 19 is again designed as a microprism structure. In particular, this structure is formed by an alternating arrangement over the circumference of the lateral surface 18 extending grooves and projections.
  • the combination of the light-directing element 10 with the reflector 2 opens up the possibility of achieving very narrow-beam light distributions, despite which a thorough mixing of the light of the LEDs 5 is achieved.
  • FIGS. 6 to 8 A second variant of a non-inventive light-guiding element is in the FIGS. 6 to 8 shown.
  • This is a variant in which an asymmetrical light emission is achieved.
  • the surface 15 of the light-directing element 10 opposite the light entry surface 11 does not form the lateral surface of a conical recess. Instead, the surface 15 is now formed as a one-sided bevel or bevelled end face of the cylinder.
  • Part of the light rays will pass through the light-directing element 10 almost unhindered and leave via the surface 15.
  • another part of the light rays is reflected on the surface 15 and emitted to the reflector 2 via the lateral surface 18.
  • an asymmetrical light emission characteristic ultimately results, which could be used, for example, for illuminating a wall or an object arranged laterally below the LED emitter.
  • the light emitted by the LEDs is used completely for illumination, with effective mixing of the light again taking place.

Claims (6)

  1. Agencement (1) destiné à l'émission de lumière, avec au moins une source de lumière (5) essentiellement ponctuelle, un élément de guidage de lumière (10), disposé en amont de la source de lumière (5) dans la direction de rayonnement, composé d'un matériau transparent, ainsi qu'avec un réflecteur (2) entourant l'élément de guidage de lumière (10),
    l'élément de guidage de lumière (10) étant constitué essentiellement à la façon d'un cylindre,
    • un côté avant du cylindre formant une surface d'entrée de lumière (11) et
    • la surface d'enveloppe (18) du cylindre étant munie de structures (19) destinées au découplage de la lumière,
    le côté du cylindre opposé à la surface d'entrée de lumière (11) étant incliné au moins partiellement par rapport à un axe longitudinal (I) du cylindre de telle sorte qu'il est transparent pour une partie de la lumière et réfléchissant pour une autre partie de la lumière,
    et
    la surface de sortie de lumière (15) de l'élément de guidage de lumière (10) formée par la surface inclinée étant formée par la surface d'enveloppe (16) d'un creux de forme conique s'étendant dans l'élément de guidage de lumière,
    caractérisé en ce que
    la surface d'entrée de lumière (11) de l'élément de guidage de lumière (10) est munie d'une structure diffusante, ou une feuille avec une structure diffusante est disposée en amont de la surface d'entrée de lumière (11) de l'élément de guidage de lumière (10).
  2. Agencement selon la revendication 1,
    caractérisé en ce que
    la structure diffusante est une microstructure.
  3. Agencement selon l'une des revendications précédentes,
    caractérisé en ce que
    le cône du creux (16) de forme conique se situe dans la plage entre 0 ° et 45 °.
  4. Agencement selon l'une des revendications précédentes,
    caractérisé en ce que
    le réflecteur (2) est constitué en forme de pot.
  5. Agencement selon l'une des revendications précédentes,
    caractérisé en ce que
    la source de lumière est formée par une LED.
  6. Agencement selon la revendication 5,
    caractérisé en ce que
    celui-ci présente plusieurs LED de différentes couleurs.
EP11757786.6A 2010-08-13 2011-08-11 Agencement pour émission de lumière comportant un élément de guidage lumineux et un réflecteur Active EP2603732B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010039306A DE102010039306A1 (de) 2010-08-13 2010-08-13 Anordnung zur Lichtabgabe mit Lichtlenkelement und Reflektor
PCT/EP2011/063837 WO2012020082A1 (fr) 2010-08-13 2011-08-11 Agencement pour émission de lumière comportant un élément de guidage lumineux et un réflecteur

Publications (2)

Publication Number Publication Date
EP2603732A1 EP2603732A1 (fr) 2013-06-19
EP2603732B1 true EP2603732B1 (fr) 2017-06-07

Family

ID=44653262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11757786.6A Active EP2603732B1 (fr) 2010-08-13 2011-08-11 Agencement pour émission de lumière comportant un élément de guidage lumineux et un réflecteur

Country Status (4)

Country Link
EP (1) EP2603732B1 (fr)
CN (1) CN102985751A (fr)
DE (1) DE102010039306A1 (fr)
WO (1) WO2012020082A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015219117A1 (de) 2015-10-02 2017-04-06 Zumtobel Lighting Gmbh Leuchtenoptik
DE102016201347A1 (de) * 2016-01-29 2017-08-03 Zumtobel Lighting Gmbh Optisches System zum Beeinflussen der Lichtabgabe einer Lichtquelle
DE102016207143A1 (de) 2016-04-27 2017-11-02 Zumtobel Lighting Gmbh Leuchtenoptik
CN111746386B (zh) * 2019-03-28 2023-08-15 奥托立夫开发公司 安全带组件和车辆
JP7360012B2 (ja) * 2019-06-27 2023-10-12 日亜化学工業株式会社 光学装置および照明装置

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
US6598998B2 (en) * 2001-05-04 2003-07-29 Lumileds Lighting, U.S., Llc Side emitting light emitting device
US7369329B2 (en) * 2006-05-04 2008-05-06 Philips Lumileds Lighting Company, Llc Producing distinguishable light in the presence of ambient light
CN101150159B (zh) * 2006-09-22 2011-05-11 鸿富锦精密工业（深圳）有限公司 发光二极管及其透镜体
CN101226924A (zh) * 2007-01-18 2008-07-23 葳天科技股份有限公司 侧射型发光二极管
US7766509B1 (en) * 2008-06-13 2010-08-03 Lumec Inc. Orientable lens for an LED fixture
CN100595478C (zh) * 2008-08-07 2010-03-24 上海亚明灯泡厂有限公司 发光装置及其所用的透镜
DE102008056049B4 (de) * 2008-11-05 2019-01-03 Automotive Lighting Reutlingen Gmbh Licht emittierende Vorrichtung umfassend mindestens eine Leuchtdiode und Beleuchtungseinrichtung für ein Kraftfahrzeug umfassend eine solche Vorrichtung

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
CN102985751A (zh) 2013-03-20
WO2012020082A1 (fr) 2012-02-16
DE102010039306A1 (de) 2012-02-16
EP2603732A1 (fr) 2013-06-19

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