EP3765783A1 - Scheinwerfer mit regelbarer lichtverteilung - Google Patents
Scheinwerfer mit regelbarer lichtverteilungInfo
- Publication number
- EP3765783A1 EP3765783A1 EP19712718.6A EP19712718A EP3765783A1 EP 3765783 A1 EP3765783 A1 EP 3765783A1 EP 19712718 A EP19712718 A EP 19712718A EP 3765783 A1 EP3765783 A1 EP 3765783A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leds
- cluster
- led
- headlight
- clusters
- 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.)
- Granted
Links
- 238000009826 distribution Methods 0.000 title description 16
- 239000011159 matrix material Substances 0.000 claims description 9
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 230000004907 flux Effects 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 10
- 230000007423 decrease Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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 on stadium headlights, and more particularly to headlights with LEDs (by which any form of semiconductor light sources are understood, including organic LEDs) arranged in a cluster in the headlight are.
- LEDs by which any form of semiconductor light sources are understood, 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-beam angle and a maximum light intensity, which is preferably along the optical axis of the headlight.
- certain illuminance levels must be achieved. This can only be achieved by superimposing different light sources, with different half-beam angles and maximum light intensities, because the position of the headlights in the stadium is different and the distance between the headlights and the surface to be illuminated is different.
- Object of the present invention is to provide a stationary headlamp, the light distribution with LEDs in the simplest possible way can be adapted to the local conditions to fulfill the lighting task.
- a special feature of the headlight according to the invention is that the LEDs within a cluster are independent of at least some of the remaining LEDs within the cluster and switched off and / or dimmable. This ensures that a different cluster, possibly with an associated optical component of the cluster, can achieve different LVKs. Both symmetric and asymmetric LVKs can be achieved by turning on and off LEDs within the cluster, depending on the design of the cluster and the different patterns in which the LEDs within the cluster are turned on and off. By independently dimming the LEDs 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 headlamp, just can not be fitted on the LED board. A continuous transformation of the LVKs is then only possible to a limited extent by the remaining LEDs in the cluster.
- the cluster has a common optic 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 need to be changed to set the LVK. It is fixed to the LEDs in the cluster and the Light distribution is achieved by switching on or off or dimming the LEDs within the cluster. This is a significant advantage over the systems in the prior art, in which a lens or a reflector over the bulbs must be moved in a complex manner or must be made individually for the headlight to meet the particular lighting task according to the local conditions of the headlamp can.
- the cluster is formed by a square matrix of LEDs.
- an LED cluster may comprise a 3x3, 4x4 or 5x5 matrix of LEDs.
- the larger the cluster the more variations are possible for the switching of the LEDs within the cluster.
- the larger the basic cluster the more different component variants of LEDs are possible.
- the cluster may also be formed by two mutually perpendicular LED rows or mutually perpendicular rectangular LED matrices.
- Embodiments in which the LED cluster has an arrangement of LEDs which is symmetrical to two mirror planes are preferred, wherein the mirror planes have the perpendicular bisector through the cluster as a common intersection straight line and lie perpendicular to one another.
- This symmetry of the LED cluster is suitable for generating circular light distributions as well as targeted switching on and off of LEDs or dimming of LEDs and light distributions that extend in different directions along the major axes of the mirror-symmetrically arranged LEDs.
- By asymmetrically switching the LEDs within the symmetrical arrangement can be with this arrangement also achieve asymmetric LVKs.
- this type of LED cluster offers a high variation in terms of light distribution to be achieved.
- the headlight may also have a plurality of the aforementioned clusters, which are spaced apart in the headlight, and in particular in a regular array, are arranged.
- the clusters can all be identical and arranged identically to each other.
- the LEDs within the clusters can also be controlled identically. This results in the same advantage as in the above-mentioned embodiments with respect to the variation of the light distribution, wherein overall the light intensity is increased.
- this embodiment also has the advantage that the different clusters can be controlled differently. Entire clusters can be connected or disconnected. Furthermore, the LEDs within the clusters can be switched on and off differently or dimmed. As a result, a very high variation in the achievable LVKs is possible.
- the plurality of clusters in the latter embodiments preferably each individually have an associated optic, e.g. As a reflector or a lens, preferably a lens with internal total reflection, on.
- an associated optic e.g. As a reflector or a lens, preferably a lens with internal total reflection, on.
- the clusters can furthermore also be arranged differently rotated relative to one another in the headlight.
- the LVKs overlap the individual cluster to a total light distribution, which differs from the light distribution of the individual clusters. For example, asymmetries in the overall light distribution which the respective individual clusters would produce as a result of the shaping of the cluster can be compensated thereby.
- Figure 1 shows a 3x3 LED cluster.
- FIG. 2 shows a 3 ⁇ 3 array, each with a 3 ⁇ 3 LED cluster.
- Figures 3a - 3c show the LVK and the luminous flux of a
- 3x3 LED cluster with one, five or nine LEDs on.
- FIG. 4 shows a 4x4 LED cluster.
- Figure 5 shows a 5x5 LED cluster.
- FIGS 6 and 7 show the 5x5 LED cluster with LEDs in different patterns turned on.
- Figures 8a and 8b show a sectional view of a 3x3 LED
- FIG. 9 shows an approximately round LED cluster with 37 LEDs.
- FIG. 10 shows an array with two different LED clusters.
- FIG. 11 shows an array with two identical LED clusters.
- a single LED cluster 2 is shown. It includes nine LEDs 1 arranged in a 3x3 matrix.
- a headlight in the simplest form, only one LED cluster is necessary. However, according to a preferred embodiment, which is illustrated in FIG. 2, several of the LED clusters 2 are provided in the headlight in order to form an array of several clusters.
- the clusters 2 are arranged in the array at a distance a, respectively.
- the distance a between the clusters to the nearest neighbor is greater than the distance of the LEDs 1 within the cluster.
- the LEDs within the clusters may be individually turned on and off or dimmed.
- the influence of this circuit on the luminous intensity distribution curve (indicated in the luminous intensity normalized to the total luminous flux), the luminous intensity (absolute), the halfway angle and the luminous flux in the various circuit states is shown in FIGS. 3a to 3c.
- Figure 3a shows the 3x3 LED cluster, in which only the middle LED 4 is turned on and the remaining LEDs 5 are turned off or are not equipped on the board.
- FIG. 3b shows the case that only the four outer LEDs 5 are switched off or not present on the board and the remaining LEDs 4 are turned on.
- Figure 3c shows the case that all nine LEDs 5 of the 3x3 LED cluster are turned on. Since the optical components of the clusters are always the same, the differently switched LEDs result in different LVKs or luminous fluxes and efficiencies.
- the maximum light intensity (Imaxl) based on the total light flux of the lamp is highest.
- the half-beam angle (half-beam angle 1) is the lowest and at the same time the luminous flux at Imaxl is at its lowest value. If more LEDs 4 are switched on, as shown in FIG. 3b, the half-beam angle increases, Imax2 decreases and the luminous flux increases. When all the LEDs 4 are in operation, as shown in FIG. 3 c, the maximum luminous flux with respect to the total light flux drops to the lowest value Imax 3, while the half-angle angle assumes the largest value. The luminous flux in Imax3 is highest.
- FIG. 4 shows an LED cluster 6 with a 4x4 matrix of LEDs.
- FIG. 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 by means of circuit states of the LEDs, as shown in FIGS. 6 and 7.
- an asymmetric LVK is generated in that in the 5 ⁇ 5 matrix of the LED cluster 7 only 3 ⁇ 3 LEDs 4 are operated in one corner while the other LEDs 5 are switched off.
- FIG. 6 shows an asymmetric LVK in that in the 5 ⁇ 5 matrix of the LED cluster 7 only 3 ⁇ 3 LEDs 4 are operated in one corner while the other LEDs 5 are switched off.
- LEDs 4 are switched on, which are connected symmetrically about a central axis of the LED cluster 7 of the 5 ⁇ 5 matrix.
- an oval LVK can be generated.
- the specifications asymmetric and oval LVK refer to it each measured on a LVK in a cone-shaped section perpendicular to the optical axis of the headlamp, which extends along the mid-perpendicular of the cluster.
- a lens 3 is provided above a 3x3 LED cluster 2.
- the lens 3 comprises a light entry region and a light exit region, at which light radiation is refracted. Further, the lens 3 also has side wall portions where light beams are totally reflected.
- By switching on or off of individual LEDs 4, 5 in the LED cluster different beam paths are activated in the lens.
- FIG. 8a only the middle LED 4 is switched on while all other LEDs 5 are switched off. Because only one 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-beam angle.
- FIG. 8b all nine lenses 5 of the 3 ⁇ 3 LED cluster are 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 mutually perpendicular vertical mirror planes preferred because they can approximate a circular shape and therefore are particularly suitable for the common optical devices.
- the high number of LEDs 1 - 37 in total in FIG. 9 - are preferred in order to produce a large variation of possible LVKs.
- FIG. 10 shows an embodiment in which a cluster 11 with 5 LEDs arranged in a cross-shaped manner is combined with only a single LED 12 in an array.
- FIG. 11 shows an arrangement with insulated LEDs in two clusters 10.
- the outer four LEDs in each of a 3 ⁇ 3 cluster are dimmed by approximately 50%. This results in an Imax, which is located between an arrangement with nine LEDs on and an arrangement with five LEDs on. A continuous adjustment of Imax or the half-value angle is possible.
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)
Abstract
Description
Claims
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 (de) | 2018-03-16 | 2019-03-15 | Scheinwerfer mit regelbarer lichtverteilung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3765783A1 true EP3765783A1 (de) | 2021-01-20 |
EP3765783B1 EP3765783B1 (de) | 2022-05-04 |
Family
ID=65894981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19712718.6A Active EP3765783B1 (de) | 2018-03-16 | 2019-03-15 | Scheinwerfer mit regelbarer lichtverteilung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3765783B1 (de) |
DE (1) | DE102018106223A1 (de) |
PL (1) | PL3765783T3 (de) |
WO (1) | WO2019175390A1 (de) |
Families Citing this family (1)
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)
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***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*** |
JP6682773B2 (ja) * | 2015-07-03 | 2020-04-15 | ウシオ電機株式会社 | Led照明装置 |
-
2018
- 2018-03-16 DE DE102018106223.0A patent/DE102018106223A1/de active Pending
-
2019
- 2019-03-15 PL PL19712718.6T patent/PL3765783T3/pl unknown
- 2019-03-15 EP EP19712718.6A patent/EP3765783B1/de active Active
- 2019-03-15 WO PCT/EP2019/056552 patent/WO2019175390A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2019175390A1 (de) | 2019-09-19 |
EP3765783B1 (de) | 2022-05-04 |
DE102018106223A1 (de) | 2019-09-19 |
PL3765783T3 (pl) | 2022-08-01 |
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