EP2339225B1 - Agencement d'émission de lumière doté de plusieurs sources lumineuses ponctuelles - Google Patents

Agencement d'émission de lumière doté de plusieurs sources lumineuses ponctuelles Download PDF

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Publication number
EP2339225B1
EP2339225B1 EP09425526.2A EP09425526A EP2339225B1 EP 2339225 B1 EP2339225 B1 EP 2339225B1 EP 09425526 A EP09425526 A EP 09425526A EP 2339225 B1 EP2339225 B1 EP 2339225B1
Authority
EP
European Patent Office
Prior art keywords
light
arrangement
output
light sources
hollow body
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
EP09425526.2A
Other languages
German (de)
English (en)
Other versions
EP2339225A1 (fr
Inventor
Melanie Hagenbring
Sascha Skergeth
Peter Roos
Patrik Gassner
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
Original Assignee
Zumtobel Lighting GmbH Austria
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 Austria filed Critical Zumtobel Lighting GmbH Austria
Priority to EP09425526.2A priority Critical patent/EP2339225B1/fr
Publication of EP2339225A1 publication Critical patent/EP2339225A1/fr
Application granted granted Critical
Publication of EP2339225B1 publication Critical patent/EP2339225B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • 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, which has a plurality of substantially point-shaped light sources. Furthermore, the present invention relates to a luminaire with a corresponding arrangement for emitting light.
  • LEDs for lighting purposes has greatly increased in the past. Meanwhile, LEDs are used in a wide variety of application areas. Thus, both lights for interior lighting and lights in the outdoor area, such as street lights and the like, nowadays equipped with LEDs as light sources.
  • Such a light is off GB 2402998 known.
  • the present invention has for its object to provide a novel arrangement for emitting light with a plurality of substantially point-shaped light sources, in which the above criteria are met.
  • the solution according to the invention is based on the idea of arranging the light sources in a special manner such that the light emitted by them is not initially emitted in the light emission direction.
  • the light sources are arranged according to the present invention on the inside of a hollow body, which has substantially the shape of a ellipsoid of revolution, in particular a hemisphere.
  • the light sources are in this case aligned such that the light emitted by them is emitted in the direction of the center of the ellipsoid of revolution, in which case the light is deflected with the aid of appropriate optical means so that it is ultimately emitted substantially parallel to the axis of rotation of the hollow body.
  • the arrangement of the light sources on the inside of a hollow body is now achieved that with a constant surface area in comparison to a planar arrangement, the number of light sources can be significantly increased. This in turn has the consequence that the total resulting luminous flux is significantly increased.
  • an arrangement for emitting light is proposed with a plurality of substantially point-shaped light sources, in particular LEDs, wherein the arrangement is characterized in that the light sources are arranged on the inside of a hollow body which has substantially the shape of a ellipsoid of revolution ellipsoidal, wherein the Light sources are aligned so that the light emitted from each light source is emitted substantially in the direction of the center of the ellipsoid of revolution, and wherein the arrangement further comprises optical means which are adapted to deflect the light of the light sources such that it is substantially parallel to Rotation axis of the hollow body is discharged.
  • the optical means provided for the desired light deflection preferably have a refractive body arranged inside the hollow body.
  • a reflector may additionally be provided, wherein the combination of refractive element and reflector is suitable for deflecting the light emitted by the light sources in the desired manner.
  • the refractive body may in particular have a light entrance surface and a light exit surface, which are connected to one another via a lateral surface, the lateral surface having a reflective coating.
  • the lateral surface which is then used to deflect the light of those light sources which are arranged in the vicinity of the light exit opening of the arrangement, is then preferably formed frusto-conical.
  • the light sources are arranged on a common carrier element, on the outside of which means for cooling are arranged.
  • These may be active or passive cooling elements.
  • the aim of the present invention is, as already mentioned, to arrange a multiplicity of punctiform light sources in such a way that, with a relatively small space requirement, the highest possible luminous fluxes can be achieved.
  • a circular area with a diameter d is to be considered, on which a number N of LEDs, each having the luminous flux ⁇ , are considered.
  • N * ⁇ a luminous flux output of N * ⁇ is obtained.
  • A d 2/4 ⁇ ⁇ maintained, but the luminous flux of the entire system can be significantly increased.
  • a special arrangement of the LEDs is proposed.
  • the solution according to the invention is fundamentally based on the idea of not arranging the light sources in a common plane as hitherto usual. Instead, now the light sources on the inside of a hollow body arranged and aligned so that they emit light into the center of the hollow body, in which case the light is deflected by means of optical means in a suitable manner.
  • the light sources which are formed in the illustrated embodiment by LEDs 2, no longer arranged on a flat circular surface.
  • the LEDs 2 are arranged on the inside of a hollow body 3, which has the form of a rotational ellipsoid half shell, in particular a spherical half shell.
  • elements for cooling the arrangement can be provided on the outer surface of the hollow body 3, which consists for example of die-cast aluminum parts.
  • These may be active cooling elements and / or heat sinks, which are designed to dissipate the heat produced during operation of the LEDs 2 to the environment. For reasons of clarity, these cooling elements are not shown in the accompanying figures.
  • the arrangement of the LEDs 2 in the hollow body 3 is such that the LEDs 2 are aligned with the center of the spherical half-shell. This is located in the middle of the circular light exit surface of the arrangement.
  • the LEDs 2 are preferably formed with upstream lenses such that they direct narrow beam the light on this center. In this way, a virtual light source is generated in the center of the sphere, which emits light radially symmetrically into the upper half-space.
  • an optical device provided with the reference numeral 10 is disposed within the hollow body 3, the design of which in particular the Fig. 2 and 3 can be removed.
  • the optical device 10 consists of two components, a refractive element 11 and a reflector surface 12.
  • the embodiment of the refractive element 11 is in particular the illustration in FIG Fig. 3 removable. It has an approximately conical structure with a light entry surface 13 and a light exit surface 14. Both surfaces 13 and 14 are each curved on the inside, whereby a lens is formed.
  • Light which of the arranged in the lower part of the arrangement 1 LEDs 2 (in Fig. 1 labeled with a), enters the refractive element 11 via the light entry surface 13 and in turn leaves it via the light exit surface 14, the shape of the surfaces 13 and 14 being selected such that the light rays substantially parallel the element 11 to the axis of rotation leave.
  • An example of this is in Figure 3 the light beam A shown.
  • the light from the upper LEDs (in Fig. 1 denoted by b), however, is reflected on the lateral surface of the refractive element 11, to which it is provided with a reflective coating.
  • the here resulting reflection surface 12 is formed in a substantially cambered frusto-conical shape and has an inclination, which is such that the light rays by about 90 ° be deflected and thus again parallel to the axis of rotation 1 of the arrangement. This light path corresponds to the one in Fig. 3 shown light beam B.
  • the optical means would have to be adapted in a corresponding manner, whereby the combination consisting of reflector and refractive element need not necessarily be used. It would also be conceivable, for example, to use Fresnel lenses.
  • the arrangement shown is more effective than an arrangement with exclusive lens optics, since the flat light in the upper 1/3 can be redirected only with great effort - and thus loss of efficiency.
  • the radiation characteristic shows that this system can be used effectively more for the generation of low to wide distribution (involute, double focus) than for extremely low beam distribution.
  • Another possibility for influencing the light distribution results from the choice of isotropically or anisotropically scattering or refracting planes, which can be positioned at a possible covering level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (9)

  1. Dispositif (1) destiné à l'émission de lumière avec plusieurs sources lumineuses (2) essentiellement ponctuelles,
    Les sources lumineuses (2) étant disposées sur le côté intérieur d'un corps creux (3) qui présente essentiellement la forme d'une coque d'ellipsoïde de révolution, les sources lumineuses (2) étant orientées de telle sorte que la lumière émise par chaque source lumineuse (2) est émise essentiellement en direction du centre de l'ellipsoïde de révolution,
    et le dispositif (1) présentant également des moyens optiques (10) qui sont constitués pour dévier la lumière des sources lumineuses (2) de telle sorte qu'elle est émise essentiellement parallèlement à l'axe de rotation (I) du corps creux (3),
    caractérisé en ce que
    le corps creux (3) a la forme d'une demi-coque d'ellipsoïde de révolution.
  2. Dispositif destiné à l'émission de lumière selon la revendication 1,
    caractérisé en ce que
    le corps creux (2) présente la forme d'une demi-coque sphérique.
  3. Dispositif destiné à l'émission de lumière selon la revendication 1 ou 2,
    caractérisé en ce que
    les moyens optiques (10) destinés à dévier la lumière présentent un corps (11) réfringent disposé à l'intérieur du corps creux (2).
  4. Dispositif destiné à l'émission de lumière selon la revendication 3,
    caractérisé en ce que
    les moyens optiques (10) destinés à dévier la lumière présentent en plus un réflecteur (12).
  5. Dispositif destiné à l'émission de lumière selon la revendication 4,
    caractérisé en ce que
    le corps (11) réfringent présente une surface d'entrée de lumière (13) ainsi qu'une surface de sortie de lumière (14) qui sont raccordées l'une à l'autre par le biais d'une surface d'enveloppe, la surface d'enveloppe présentant un revêtement réfléchissant.
  6. Dispositif destiné à l'émission de lumière selon la revendication 5,
    caractérisé en ce que
    la surface d'enveloppe du corps (11) réfringent présente une forme de type tronconique.
  7. Dispositif destiné à l'émission de lumière selon l'une des revendications précédentes,
    caractérisé en ce que
    les sources lumineuses (2) sont disposées - de préférence conjointement - sur un élément de support sur le côté extérieur duquel sont disposés des moyens de refroidissement.
  8. Dispositif destiné à l'émission de lumière selon l'une des revendications précédentes,
    caractérisé en ce que
    les sources lumineuses (2) sont formées de LED.
  9. Luminaire avec un dispositif destiné à l'émission de lumière selon l'une des revendications précédentes.
EP09425526.2A 2009-12-22 2009-12-22 Agencement d'émission de lumière doté de plusieurs sources lumineuses ponctuelles Active EP2339225B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09425526.2A EP2339225B1 (fr) 2009-12-22 2009-12-22 Agencement d'émission de lumière doté de plusieurs sources lumineuses ponctuelles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09425526.2A EP2339225B1 (fr) 2009-12-22 2009-12-22 Agencement d'émission de lumière doté de plusieurs sources lumineuses ponctuelles

Publications (2)

Publication Number Publication Date
EP2339225A1 EP2339225A1 (fr) 2011-06-29
EP2339225B1 true EP2339225B1 (fr) 2016-07-27

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ID=42184025

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EP09425526.2A Active EP2339225B1 (fr) 2009-12-22 2009-12-22 Agencement d'émission de lumière doté de plusieurs sources lumineuses ponctuelles

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EP (1) EP2339225B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011079741A1 (de) * 2011-07-25 2013-01-31 Osram Ag Leuchte mit einer vielzahl von leds
DE102020133218A1 (de) * 2020-12-11 2022-06-15 Bartenbach Holding Gmbh Lichtreaktor sowie Verfahren zur synthetischen Stofferzeugung mittels Lichtbestrahlung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7152996B2 (en) * 2001-04-27 2006-12-26 Altman Stage Lighting Co., Inc. Diode lighting system
JP2005038605A (ja) * 2002-02-12 2005-02-10 Daisei Denki Kk 照明器具
FR2856135B1 (fr) * 2003-06-16 2006-08-04 Valeo Vision Systeme d'eclairage ou de signalisation pour vehicule automobile.
JP2010506348A (ja) * 2006-10-19 2010-02-25 パナソニック株式会社 発光装置とこれを用いた表示装置及び照明装置

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Publication number Publication date
EP2339225A1 (fr) 2011-06-29

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