WO2019175389A1 - Projecteur pourvu de groupes de del - Google Patents

Projecteur pourvu de groupes de del Download PDF

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Publication number
WO2019175389A1
WO2019175389A1 PCT/EP2019/056551 EP2019056551W WO2019175389A1 WO 2019175389 A1 WO2019175389 A1 WO 2019175389A1 EP 2019056551 W EP2019056551 W EP 2019056551W WO 2019175389 A1 WO2019175389 A1 WO 2019175389A1
Authority
WO
WIPO (PCT)
Prior art keywords
led
clusters
headlight according
array
leds
Prior art date
Application number
PCT/EP2019/056551
Other languages
German (de)
English (en)
Inventor
Timo Eichele
Jochen Holzbauer
Bernhard Wuppinger
Original Assignee
Siteco Beleuchtungstechnik Gmbh
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 Siteco Beleuchtungstechnik Gmbh filed Critical Siteco Beleuchtungstechnik Gmbh
Publication of WO2019175389A1 publication Critical patent/WO2019175389A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/003—Searchlights, i.e. outdoor lighting device producing powerful beam of parallel rays, e.g. for military or attraction purposes
    • 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
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for 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
    • 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
    • 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
    • F21Y2105/12—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
    • 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • F21Y2113/17—Combination of light sources of different colours comprising an assembly of point-like light sources forming a single encapsulated light source
    • 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 a headlamp for stationary mounting in the exterior or interior, in particular a stadium headlamp, and in particular relates to the arrangement of the LED within the headlamp.
  • a plurality of LEDs in a headlight which is understood here to mean any form of semiconductor light sources, including organic LEDs
  • a cluster has a matrix arrangement of 3x3 LEDs
  • the result is a slightly quadratic distortion in the luminous intensity distribution measured in a plane perpendicular to the optical axis of the headlamp. This effect is exacerbated as the size of the cluster increases.
  • optical components or faceted reflectors is trying to generate from the square or rectangular distorted light distribution curve again a rotationally symmetric light distribution.
  • Object of the present invention is to provide a headlamp with LEDs, which a possible rotationally symmetric light distribution curve at the same time lower half-beam angle, ie a sharp maximum of the light distribution curve along the optical axis of the headlight generated.
  • a special feature of the headlight according to the present invention is that several LED clusters are provided in an array in the headlight and the clusters are rotated against each other about their central axis.
  • the same matrix-shaped, cross-shaped or other arrangements of LEDs can be provided within each cluster and the clusters are each rotated by an angle to a nearest neighbor.
  • a superposition of the individual light distribution curves results in a rotationally symmetrical overall light distribution curve, without widening the overall light distribution, i. to generate a larger half-beam angle around the maximum of the light intensity along the optical axis.
  • the angle of rotation of the individual LED clusters depends on the cluster size. Generally, for rectangular LED clusters, the larger the cluster, the smaller the angle of rotation must be to produce a rotationally symmetric light distribution.
  • each of the LED clusters each has a row of LEDs, in particular three LEDs.
  • a single row of LEDs would produce an elliptically distorted light distribution.
  • the LED clusters comprise a rectangular or square matrix of LEDs. These LED clusters would also individually produce an elliptical or square-distorted LVK in a cone-shaped curve around the optical axis. The superimposition of the mutually rotated individual LVKs results in a rotationally symmetric LVK again.
  • some of the LED clusters comprise a cross-shaped arrangement of two mutually perpendicular LED rows or rectangular LED arrays.
  • the individual LVKs of these clusters would already be closer to a circular shape, but still distorted in relation to the circular shape.
  • the plurality of LED clusters are rotated by the angles ⁇ a and ⁇ 2a to each other, where a is an angle ⁇ 45 °.
  • a is an angle ⁇ 45 °.
  • larger square LED clusters require a smaller twist angle compared to linearly extending clusters.
  • the LED clusters must be rotated by ⁇ 22.5 ° and ⁇ 45 ° to each other.
  • the angle of rotation must be greater.
  • the angle of a 45 ° is preferred.
  • This arrangement has further advantages in terms of possible thermal distortion of the LED array.
  • the effects of thermal distortion occur in a symmetric array of at least nine or more clusters inside the LED clusters out.
  • the rotationally symmetrical LVK is maintained even when the headlamp is heated.
  • a 45 ° as previously stated
  • the total light distribution produced by all LED clusters measured in a conical-section section of the lamp, in particular a cone-shaped section perpendicular to the main emission of the lamp is constant. This results in a uniform illuminance on a flat surface, which is arranged at an angle to the optical axis of the headlamp. In the event that the headlamp is aligned exactly perpendicular to the surface to be illuminated, a constant light distribution curve in each conical section of the lamp perpendicular to the main emission of the lamp is desirable.
  • each of the LED clusters has its own optical device.
  • the optical Device can serve to bundle the light distribution of the respective cluster. However, it does not have to be designed to spread the light distribution. Accordingly, a faceted reflector or a lens having light-diffusing properties is not necessary. The scattering of the light to even out the LVK, as is common in the prior art, is not necessary due to the mutually rotated LED clusters. The optics can therefore be made more light bundling, if a strong focusing headlights is desired.
  • the distance of adjacent LED clusters in the array is greater than or equal to the optical device.
  • the optical devices for each cluster can be arranged close to the array.
  • the optical devices may also be connected together, each associated with one of the LED clusters, which is inexpensive to manufacture. Separate optical devices for each cluster have the advantage of being less sensitive to thermal distortion of the entire device.
  • the LEDs within the LED cluster have different colors.
  • the LED colors in an LED cluster may include red, green and blue.
  • white light can be generated.
  • a single cluster would still show color differences, because the mixture of light within a cluster with an optic, as far as it is not light scattering, not sufficient for complete mixing of the light of the LEDs.
  • the inventive arrangement of several clusters, which are twisted to each other, however, this effect is compensated, so that the different LED colors in the entire headlamp are mixed so far that, for example, white light can be generated. Any other mixed color can also be generated, in which case the number of red, green and blue LED colors are selected accordingly.
  • the headlight may also comprise at least two different groups of respective same LED clusters in an array.
  • the groups of LED clusters in the array are each rotated as described above for the same LED clusters.
  • the twist angles within the groups of clusters need not be the same.
  • the smaller clusters may have a greater angle of rotation than the larger clusters.
  • individual or multiple LED clusters in the array can be switched on and off separately and / or dimmable independently of the other clusters in the array.
  • different light distribution curves can be generated by a headlight.
  • the light distribution can be switched, for example between oval and circular.
  • dimming the light distribution can even be changed continuously.
  • individual LEDs within the clusters can be switched separately from the remaining LEDs of the relevant cluster.
  • Also in these embodiments can be different Create light distributions by turning on or off or dimming LEDs within the clusters.
  • Figure 1 shows an array of nine 3x3 LED clusters.
  • FIG. 2 shows an array of nine LED clusters with LEDs arranged in a cruciform manner.
  • FIG. 3 shows two LED clusters, each with 21 LEDs, which are rotated relative to one another around the angle a.
  • FIGS 4a and 4b show LED boards with linear 3x3 LED
  • Clusters rotated at 45 ° and 90 ° to each other in an array of new clusters, where gur 4b involves thermal distortion.
  • FIG. 5 shows mutually rotated 4x4 LED clusters in one
  • Figures 6a and 6b show LVKs in a vertical
  • Section plane through the luminaire without rotated clusters (a) and with clusters rotated by 30 ° (b).
  • FIG. 7 shows an array with two mixed cluster sizes.
  • FIG. 1 there is shown a first embodiment of a headlamp, wherein the headlamp only the top view of the LED array in the headlight is shown.
  • the arrangement comprises nine LED clusters 2, each comprising a 3x3 matrix of LEDs 1.
  • the clusters are offset by a distance a from each other, wherein the distance a is substantially greater than the distance of the LEDs 1 within the cluster.
  • Each cluster is associated with an optical component 3, for example a lens.
  • the clusters 2 are twisted relative to one another, the relative angle between clusters a and 2a being.
  • a can be an acute angle ⁇ 45 °, in particular 22.5 °. In another embodiment, the angle a may also be 30 °.
  • Each of the clusters 2 with associated optics 3 generates its own light distribution, which differ in a cone-shaped section from an ideal circular light distribution.
  • the overall result is an approximately circularly symmetrical light distribution.
  • FIG. 2 shows an alternative embodiment in which the clusters 2 each comprise five LEDs 1, the LEDs being arranged in two mutually perpendicular rows to three LEDs.
  • This type of cross-shaped cluster also, taken together with the optics, produces an asymmetrically distorted light distribution. Due to the rotation angle, however, this effect is canceled out in the LVK of the entire headlamp by the rotation of the LED cluster 2 relative to one another.
  • FIG. 3 shows an arrangement with two LED clusters 2, each having 21 LEDs 1.
  • the LEDs within the clusters are aligned in the form of two rectangular LED matrices (3x5 matrix) arranged perpendicular to each other.
  • This type of cluster is already approximated to a circular shape, making these clusters especially for circular optical Facilities 3 are suitable.
  • the rotation about the angle a releases the asymmetry of the light distributions in the total light distribution.
  • relatively small twist angles a are sufficient.
  • the use of only two clusters, which are rotated at an angle of less than 30 ° to each other is sufficient to compensate for the effect in the light distribution.
  • Figures 4a and 4b show a special arrangement of 3x1 LED cluster 2, which are not only set up to produce a circular distribution as possible, but also to compensate for the effect of thermal expansion of the board on which the clusters are arranged.
  • all LED rows of the clusters are aligned in the center of the LED board 5 in a square array of a total of nine 3 ⁇ 1 clusters 2.
  • the center 8 of the optical system 3 should be as central as possible above the middle LED.
  • FIG. 5 shows an embodiment with six LED clusters 12, each having a 4x4 matrix of LEDs.
  • differently colored LEDs 9, 10 and 11 in the colors red, green and blue are combined in each cluster.
  • the clusters are rotated at the angle a against each other, as in the previous embodiments described.
  • the light of the cluster 12 is already mixed within the clusters, so that the color red, green and blue produces approximately white light.
  • the light mixture within the clusters 12 is still insufficient.
  • FIGS. 6a and 6b show the effect of the rotation of the clusters relative to one another.
  • the figures show a LVK in a vertical plane through the light exit surface of the headlamp, wherein in the x-axis, the polar angle is plotted against the mid-perpendicular in the sectional plane.
  • the dashed and solid lines indicate the values for two mutually perpendicular planes (C0 / 180 plane and C90 / 270 plane of the luminaire).
  • Figure 6a shows a comparative example in which 3x3 LED clusters in an array of six clusters are all arranged in parallel.
  • the LVK in the plane parallel to the rows of LEDs indicates distinct spikes (in Figure 6a the solid line).
  • Figure 6b shows an embodiment in which the 3x3 LED clusters are rotated in 30 ° increments to each other.
  • the LVK is much more rotationally symmetric, which can be seen from the fact that the dashed and the solid line of the two different cutting planes are congruent to each other.
  • FIG. 7 shows a circuit board 5 with three 3x3 LED clusters 2 and two 2x2 clusters.
  • the two different clusters are positioned in an array of 2x3 clusters.
  • the 3x3 LED clusters are rotated around and 2a to each other.
  • the three 2x2 LED clusters are rotated by ⁇ 45 ° to each other.
  • a larger one is for the smaller cluster sizes Angle of rotation necessary than for the larger cluster sizes to achieve the desired effect of a rotationally symmetric light distribution as possible.
  • optical component e.g. Lens or reflector

Landscapes

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

Abstract

L'invention concerne un projecteur pour un montage stationnaire dans une zone intérieure ou extérieure, en particulier un projecteur de stade, comprenant une barrette constituée d'une pluralité de groupes identiques de DEL, chaque groupe de DEL comportant plusieurs DEL, et les groupes de DEL étant agencés les uns par rapport aux autres dans la barrette à une distance qui est supérieure à la distance des DEL à l'intérieur du groupe de DEL, au moins quelques-uns des plusieurs groupes de DEL identiques s étant agencés les uns par rapport aux autres dans la barrette de manière à être tournés les uns contre les autres autour de leur axe central.
PCT/EP2019/056551 2018-03-16 2019-03-15 Projecteur pourvu de groupes de del WO2019175389A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018106225.7A DE102018106225A1 (de) 2018-03-16 2018-03-16 Scheinwerfer mit LED-Cluster
DE102018106225.7 2018-03-16

Publications (1)

Publication Number Publication Date
WO2019175389A1 true WO2019175389A1 (fr) 2019-09-19

Family

ID=65951532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/056551 WO2019175389A1 (fr) 2018-03-16 2019-03-15 Projecteur pourvu de groupes de del

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Country Link
DE (1) DE102018106225A1 (fr)
WO (1) WO2019175389A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090316393A1 (en) * 2006-07-18 2009-12-24 Koninklijke Philips Electronics N V Composite light source
EP2154423A1 (fr) * 2008-08-12 2010-02-17 Bega Gantenbrink-Leuchten KG Emetteur LED à couleur
WO2014117704A2 (fr) * 2013-01-31 2014-08-07 深圳市光峰光电技术有限公司 Système de source de lumière à del et dispositif d'éclairage à del
EP2918900A1 (fr) * 2014-03-14 2015-09-16 Hella KGaA Hueck & Co. Dispositif d'éclairage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007044566A1 (de) * 2007-09-07 2009-03-12 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Beleuchtungssystem
DE102015004969B4 (de) * 2015-04-20 2016-12-22 Drägerwerk AG & Co. KGaA Operationsleuchte zur Erzeugung eines aus Teillichtfeldern bestehenden Gesamtlichtfeldes
DE202015104292U1 (de) * 2015-08-14 2016-11-15 Zumtobel Lighting Gmbh LED-Anordnung mit Pitch-Kompensation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090316393A1 (en) * 2006-07-18 2009-12-24 Koninklijke Philips Electronics N V Composite light source
EP2154423A1 (fr) * 2008-08-12 2010-02-17 Bega Gantenbrink-Leuchten KG Emetteur LED à couleur
WO2014117704A2 (fr) * 2013-01-31 2014-08-07 深圳市光峰光电技术有限公司 Système de source de lumière à del et dispositif d'éclairage à del
EP2918900A1 (fr) * 2014-03-14 2015-09-16 Hella KGaA Hueck & Co. Dispositif d'éclairage

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Publication number Publication date
DE102018106225A1 (de) 2019-09-19

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