EP3765783B1 - Projecteur présentant une distribution de lumière régulable - Google Patents

Projecteur présentant une distribution de lumière régulable Download PDF

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Publication number
EP3765783B1
EP3765783B1 EP19712718.6A EP19712718A EP3765783B1 EP 3765783 B1 EP3765783 B1 EP 3765783B1 EP 19712718 A EP19712718 A EP 19712718A EP 3765783 B1 EP3765783 B1 EP 3765783B1
Authority
EP
European Patent Office
Prior art keywords
leds
clusters
cluster
led
headlamp
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
EP19712718.6A
Other languages
German (de)
English (en)
Other versions
EP3765783A1 (fr
Inventor
Timo Eichele
Jochen Holzbauer
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.)
Siteco GmbH
Original Assignee
Siteco GmbH
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Publication date
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Publication of EP3765783A1 publication Critical patent/EP3765783A1/fr
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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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/105—Outdoor lighting of arenas or the like
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements

Definitions

  • the present invention relates to a headlight for stationary mounting in an indoor or outdoor space, in particular to stadium headlights, and in particular to headlights with LEDs (which means any form of semiconductor light sources, including organic LEDs) arranged in a cluster in the headlight are.
  • LEDs which means any form of semiconductor light sources, including organic LEDs
  • LVK light distribution curve to be generated
  • LVK which should generally be rotationally symmetrical in a conic curve, have a given half divergence angle and a maximum luminous intensity, which preferably lies along the optical axis of the headlight.
  • certain levels of illuminance must be achieved. This can only be achieved by superimposing different LDCs with different half beam angles and maximum light intensities, since the position of the spotlights in the stadium is different and the distance between the spotlights and the area to be illuminated is different.
  • Lighting devices with one or more LED clusters are disclosed in the following publications: U.S. 2015/009677 A1 , U.S. 2009/046453 A1 , WO 2014/117704 A2 , U.S. 2012/068615 A1 , U.S. 2012/319616 A1 , U.S. 2017/002987 A1 and EP 2 985 512 A1 .
  • the object of the present invention is to provide a stationary headlight whose light distribution with LEDs can be adapted to the local conditions for fulfilling the lighting task in the simplest possible way.
  • a special feature of the headlight according to the invention is that the LEDs within a cluster can be switched on and off and/or dimmed independently of at least some of the other LEDs within the cluster.
  • different LDCs can be achieved by a cluster, possibly with an associated optical component of the cluster.
  • Both symmetrical and asymmetrical LDCs can be achieved by switching LEDs on and off within the cluster depending on the design of the cluster and the different patterns in which the LEDs are switched on and off within the cluster.
  • the LVKs can even be continuously transformed into each other. In a cluster, LEDs that are not needed for the desired light distribution of the headlight simply cannot be fitted on the LED circuit board. A continuous transformation of the LVKs is then only possible to a limited extent due to the remaining LEDs in the cluster.
  • the cluster has common optics for all LEDs in the cluster.
  • a reflector and/or a lens in particular a lens with total internal reflection, can be provided for all LEDs in the cluster.
  • the optical component does not have to be changed to adjust the LVK. It is fixed to the LEDs in the cluster and the light is distributed by switching the LEDs on and off or dimming them within the cluster. This is a significant advantage compared to the systems in the prior art, in which a lens or a reflector has to be moved in a complex manner relative to the light sources or has to be manufactured individually for the headlight in order to fulfill the special lighting task according to the local conditions of the headlight be able.
  • the cluster is formed by a square matrix of LEDs.
  • an LED cluster may include a 3x3, 4x4, or 5x5 matrix of LEDs.
  • the larger the cluster the more variations are possible for switching the LEDs within the cluster.
  • the larger the basic cluster the more different assembly variants of LEDs are possible.
  • the cluster can also be formed by two LED rows running perpendicular to one another or rectangular LED matrices running perpendicular to one another.
  • the LED cluster has an arrangement of LEDs that is symmetrical to two mirror planes, the mirror planes having the perpendicular bisector through the cluster as a common line of intersection and being perpendicular to one another.
  • This symmetry of the LED cluster is suitable for circular light distributions and also light distributions that extend in different directions along the main axes of the mirror-symmetrically arranged LEDs by switching LEDs on and off in a targeted manner or by dimming LEDs.
  • asymmetrical LDCs can also be achieved with this arrangement.
  • this type of LED cluster offers a high degree of variation in terms of the light distribution to be achieved.
  • the headlight also has a plurality of the clusters mentioned above, which are arranged in the headlight at a distance from one another, and in particular in a regular array.
  • the clusters can all be designed identically and arranged identically to one another.
  • the LEDs within the cluster can also be controlled identically. This results in the same advantage as in the previously mentioned embodiments in relation to the variation of the light distribution, with the light intensity being increased overall.
  • this embodiment also offers the advantage that the different clusters can be controlled differently. Entire clusters can be switched on or off. Furthermore, the LEDs within the cluster can be switched on and off or dimmed differently. As a result, a very high variation in the LVKs to be achieved is possible.
  • the multiple clusters each individually have associated optics, e.g. B. a reflector or a lens, preferably a lens with total internal reflection on.
  • associated optics e.g. B. a reflector or a lens, preferably a lens with total internal reflection on.
  • the clusters can also be arranged in the headlight with different rotations to one another.
  • the LVKs of the individual clusters are superimposed to form an overall light distribution that differs from the light distribution of the individual clusters. For example, asymmetries in the overall light distribution can be compensated for, which the individual clusters would produce due to the shape of the cluster.
  • a single LED cluster 2 is shown. It comprises nine LEDs 1 arranged in a 3x3 matrix.
  • only one LED cluster is required to form a headlight.
  • multiple of the LED clusters 2 are provided in the headlight to form a multiple cluster array.
  • the clusters 2 are each arranged at a distance a in the array. The distance a between the clusters and their nearest neighbors (measured from center to center) is greater than the distance between the LEDs 1 within the cluster.
  • the LEDs within the clusters can be switched on and off or dimmed individually.
  • the influence of this circuit on the light intensity distribution curve (specified in the light intensity normalized to the total luminous flux), the light intensity (absolute), the half beam angle and the luminous flux in the various switching states is shown in the Figures 3a to 3c shown.
  • Figure 3a shows the 3x3 LED cluster in which only the middle LED 4 is switched on and the remaining LEDs 5 are switched off or are not populated on the circuit board.
  • Figure 3b shows the case in which only the four outer LEDs 5 are switched off or are not present on the circuit board and the remaining LEDs 4 are switched on.
  • Figure 3c shows the case that all nine LEDs 5 of the 3x3 LED cluster are switched on. Since the optical components of the cluster are always the same, the LEDs that are switched on differently result in different LDCs or luminous fluxes and efficiencies.
  • Figure 3a is the greatest luminous intensity (Imax1) in relation to the total luminous flux of the luminaire.
  • the half peak angle (half peak angle 1) is the lowest and at the same time the luminous flux is at the lowest value at Imax1.
  • FIGs 4 and 5 show alternatives for the LED cluster.
  • an LED cluster 6 is shown with a 4x4 matrix of LEDs.
  • figure 5 shows an LED cluster 7 in the form of a 5 ⁇ 5 matrix.
  • the larger clusters allow a higher variation of patterns in which the LEDs can be switched on and off or dimmed.
  • symmetrical or oval light distribution curves can also be generated using switching states of the LEDs, as in Figures 6 and 7 are shown.
  • an asymmetrical LVK is generated in that in the 5x5 matrix of the LED cluster 7 only 3x3 LEDs 4 are operated in one corner, while the other LEDs 5 are switched off.
  • LEDs 4 turned on, which are turned on symmetrically about a central axis of the LED cluster 7 of the 5x5 matrix.
  • an oval LVK can be generated.
  • the details of asymmetric or oval LVK each relate to an LVK measured in a section of the envelope of a cone perpendicular to the optical axis of the headlight, which runs along the perpendicular bisector of the cluster.
  • a lens 3 is provided above a 3 ⁇ 3 LED cluster 2.
  • the lens 3 includes a light entry area and a light exit area at which light radiation is refracted. Furthermore, the lens 3 also has side wall areas at which light rays are totally reflected. Different beam paths in the lens are activated by switching on or off individual LEDs 4, 5 in the LED cluster.
  • Figure 8a only the middle LED 4 is switched on while all other LEDs 5 are switched off. Due to the fact that only a middle LED 5 is switched on, the light beams L11, L12 and L13 leave the lens 3 almost parallel and thus produce a high Imax or a small half divergence angle.
  • Figure 8b all nine lenses 5 of the 3x3 LED cluster switched on.
  • an LED cluster 8 is shown, in which the LEDs approximate a circle.
  • Embodiments with LED clusters, in which the LEDs are mirror-symmetrical to two on top of one another, are very general perpendicular vertical mirror planes are aligned, preferred because they can approximate a circular shape and are therefore particularly suitable for the usual optical devices.
  • the high number of LEDs 1 - in figure 9 37 pieces in total - are preferred to create a wide variety of possible LVKs.
  • FIG 10 an embodiment is shown in which a cluster 11 with 5 LEDs arranged in a cross shape is combined with only a single LED 12 in an array.
  • figure 11 10 shows an arrangement with dimmed LEDs in two clusters 10.
  • the outer four LEDs in a 3 ⁇ 3 cluster are dimmed by around 50%. This results in an Imax that is between an arrangement with nine LEDs on and an arrangement with five LEDs on. A stepless setting of Imax or the half-value angle is therefore possible.
  • nxn clusters can be used.
  • Asymmetric clusters are also possible.
  • individual LEDs within a cluster that are not required for the desired light distributions can also be omitted completely. In this case, a blank is simply provided at the relevant point in the cluster. However, the remaining LEDs in the cluster are controllable as previously described.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (7)

  1. Projecteur destiné au montage stationnaire dans un espace intérieur ou extérieur, plus particulièrement un projecteur de stade, dans lequel le projecteur comprend plusieurs groupes (2, 6, 7, 11) avec chacun plusieurs LED (1), dans lequel les groupes sont disposés de manière distante entre eux, dans lequel certaines des LED dans chacun des groupes peuvent être allumées et éteintes et/ou réglables indépendamment d'au moins certaines des autres LED du groupe, dans lequel chacun des groupes comprend sa propre optique (3) pour respectivement toutes les LED du groupe concerné et dans lequel les groupes de LED comprennent chacun une disposition de LED qui est symétrique par rapport à deux plans de symétrie, dans lequel les plans de symétrie comprennent la verticale centrale à travers le groupe en tant que droite d'intersection commune et sont perpendiculaires entre eux, caractérisé en ce que les LED de chacun des groupes peuvent être commutées et/ou réglées séparément afin d'obtenir différents motifs, qui sont chacun symétriques par rapport aux plans de symétrie mentionnés et les LED peuvent également être commutées ou réglées afin d'obtenir des motifs qui sont asymétriques par rapport aux plans de symétrie mentionnés, dans lequel la commutation asymétrique des LED à l'intérieur de la disposition symétrique permet d'obtenir une courbe de répartition de la lumière asymétrique.
  2. Projecteur selon la revendication 1, dans lequel les optiques sont constituées d'un réflecteur et/ou d'une lentille, plus particulièrement d'une lentille (3) avec une réflexion interne totale.
  3. Projecteur selon l'une des revendications précédentes, dans lequel les groupes (2,6,7) comprennent chacun une matrice carrée de LED (1).
  4. Projecteur selon la revendication 3, dans lequel les groupes de LED (2, 6, 7) sont constitués chacun d'une matrice 3x3, 4x4 ou 5x5 de LED.
  5. Projecteur selon l'une des revendications 1 à 3, dans lequel les groupes (11) sont constitués chacun de deux rangées de LED perpendiculaires entre elles ou matrices de LED rectangulaires perpendiculaires entre elles.
  6. Projecteur selon l'une des revendications précédentes, dans lequel les groupes (2, 6, 7, 11) sont disposés de façon à être tournés les uns par rapport aux autres dans le projecteur.
  7. Projecteur selon l'une des revendications précédentes, dans lequel au moins deux groupes (2, 6, 7, 11) disposent d'un nombre, d'une disposition et/ou d'une couleur différente de LED.
EP19712718.6A 2018-03-16 2019-03-15 Projecteur présentant une distribution de lumière régulable Active EP3765783B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018106223.0A DE102018106223A1 (de) 2018-03-16 2018-03-16 Scheinwerfer mit regelbarer Lichtverteilung
PCT/EP2019/056552 WO2019175390A1 (fr) 2018-03-16 2019-03-15 Projecteur présentant une distribution de lumière régulable

Publications (2)

Publication Number Publication Date
EP3765783A1 EP3765783A1 (fr) 2021-01-20
EP3765783B1 true EP3765783B1 (fr) 2022-05-04

Family

ID=65894981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19712718.6A Active EP3765783B1 (fr) 2018-03-16 2019-03-15 Projecteur présentant une distribution de lumière régulable

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EP (1) EP3765783B1 (fr)
DE (1) DE102018106223A1 (fr)
PL (1) PL3765783T3 (fr)
WO (1) WO2019175390A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020130685A1 (de) 2020-11-20 2022-05-25 Bartenbach Holding Gmbh Strahler sowie Leuchte mit einer Vielzahl solcher Strahler

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005022832A1 (de) * 2005-05-11 2006-11-16 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Scheinwerfer für Film- und Videoaufnahmen
DE102007046873A1 (de) * 2006-09-28 2008-04-10 Zweverink, Birgit Wand- oder Bodenbelag
US8585253B2 (en) * 2009-08-20 2013-11-19 Illumitex, Inc. System and method for color mixing lens array
US8820963B2 (en) * 2011-06-14 2014-09-02 Osram Sylvania Inc. Solid state light fixture with a tunable angular distribution
US9470406B2 (en) * 2012-09-24 2016-10-18 Terralux, Inc. Variable-beam light source and related methods
CN103968268B (zh) * 2013-01-31 2016-09-21 深圳市光峰光电技术有限公司 一种led光源系统和led照明装置
CN203258423U (zh) * 2013-04-11 2013-10-30 深圳市绎立锐光科技开发有限公司 Led单元模组、发光装置以及光源系统
JP6682773B2 (ja) * 2015-07-03 2020-04-15 ウシオ電機株式会社 Ｌｅｄ照明装置

Also Published As

Publication number Publication date
DE102018106223A1 (de) 2019-09-19
PL3765783T3 (pl) 2022-08-01
WO2019175390A1 (fr) 2019-09-19
EP3765783A1 (fr) 2021-01-20

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