EP3477193B1 - Couvercle pour un module lumineux et module lumineux - Google Patents

Couvercle pour un module lumineux et module lumineux Download PDF

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Publication number
EP3477193B1
EP3477193B1 EP18202403.4A EP18202403A EP3477193B1 EP 3477193 B1 EP3477193 B1 EP 3477193B1 EP 18202403 A EP18202403 A EP 18202403A EP 3477193 B1 EP3477193 B1 EP 3477193B1
Authority
EP
European Patent Office
Prior art keywords
light
structures
cover
lighting module
module according
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
EP18202403.4A
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German (de)
English (en)
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EP3477193A1 (fr
Inventor
Konstantin Engeter
Tobias Hösle
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 EP3477193A1 publication Critical patent/EP3477193A1/fr
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Publication of EP3477193B1 publication Critical patent/EP3477193B1/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
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements

Definitions

  • a cover for a lighting module is specified. Furthermore, a lighting module is specified, in particular with such a cover.
  • the pamphlets DE 10 2007 013082 A1 , DE 20 2014 101 954 U1 , DE 10 2013 226 181 A1 and DE 10 2015 114 310 A1 describe a cover for a lighting module and a lighting module.
  • One problem to be solved is to specify a cover for a lighting module with which a surface in a target area can be illuminated particularly uniformly and with a particularly high illuminance. Another problem to be solved is to specify a cover in which the luminance appears particularly homogeneous from all viewing directions on a light exit side. Another problem to be solved is to specify a lighting module with such a cover.
  • the invention relates to a lighting module according to claim 1, which has a multiplicity of light sources and a cover.
  • a cover for a lighting module is specified.
  • the cover is a translucent body that can have optical properties. This means that the cover can be provided for the purpose of optically influencing passing light, for example at least partially deflecting and/or bundling and/or scattering.
  • the cover is designed as a cover for a lighting module.
  • the lighting module comprises a multiplicity of light sources, which the cover is arranged downstream of in the emission direction of the light sources.
  • the cover includes a light entry side.
  • the light entry side is that side of the cover which is intended for light entry.
  • this side of the cover faces the at least one light source of the lighting module when the cover is used in a lighting module.
  • the cover also has a light exit side, which is arranged on the side of the cover facing away from the light entry side.
  • Light that enters the cover on the light entry side is optically influenced by the cover, for example, and exits the cover as optically influenced light on the light exit side of the cover.
  • the cover comprises a multiplicity of first structures on the light entry side.
  • the structuring includes a large number of first structures, which can be designed as elevations in the material of the cover.
  • the first structures can be formed geometrically similar to each other.
  • the first structures are provided for optically influencing light that enters the cover through the first structures.
  • the first structures can be light-refracting and/or light-reflecting structures.
  • the first structures are at least partially intended to deflect light entering them by total reflection.
  • the cover comprises a multiplicity of second structures on the light entry side.
  • the structuring on the light entry side of the cover comprises a second type of structure which is also designed to optically influence incoming light, for example to break and/or reflect it.
  • the second structures can be embodied as elevations in the material of the cover and can be embodied at least in part similarly to one another.
  • the second structures differ from the first structures, for example with regard to the location on the light entry side of the cover and/or a geometric design and/or a structure size and/or a curve along which they extend.
  • the first structures and the second structures perform different optical tasks in the cover and are therefore also different from one another with regard to their optical effect.
  • the first structures run along parallel curves.
  • the first structures can run, for example, along straight lines that are parallel to one another.
  • the first structures it is possible for the first structures to run along curved curves, along wavy curves or along polygonal lines that are shifted parallel to one another, for example.
  • the first structures then run at least along two parallel curves that are designed accordingly.
  • the cover it is possible for the cover to have more than two first structures, which run in pairs along parallel curves.
  • the parallel curves can be formed by mutually parallel straight lines.
  • the parallel curves along which the first structures extend can be in the form of concentric circles.
  • the second structures run transversely to the first structures. This means that the second structures do not run along the parallel curves along which the first structures run, but rather the second structures extend along a curve, for example along a straight line, which intersects the parallel curves of the first structures at least in extension.
  • the second structures can also be arranged at least partially along parallel curves. This means that the second structures can be arranged, for example, along straight lines that are parallel to one another and then run, for example, transversely or perpendicularly to the parallel curves of the first structures.
  • At least two of the second structures are arranged adjacent and spaced apart such that light from a light source arranged in an open area between the adjacent and spaced-apart second structures partially impinges directly on at least one of the first structures.
  • each light source comprises at least one light-emitting diode
  • the cover is free of second structures.
  • the second structures which are adjacent to one another and delimit the open area on two sides, for example, are spaced far enough from one another that they in particular do not touch the light source and run, for example, at the edge of a light exit surface of the light source.
  • the second structures can have a multiplicity of mutually adjacent and spaced pairs, between which a light source can be arranged in each case.
  • each second structure can be assigned to exactly one light source, with each light source being assigned, for example, exactly two second structures, namely second structures that are adjacent to one another and spaced apart.
  • the second structures are then in particular present in an even number and in particular are arranged in pairs.
  • the second structures of each paired arrangement of second structures, between which a light source can be arranged in each case can be mirror-symmetrical to one another.
  • the cover can have second structures which are adjacent to one another but are not spaced apart from one another. Between these second structures is then no open area is arranged and it is not intended to arrange a light source between these second structures.
  • These second structures can be in direct contact with one another, for example.
  • the cover can then, for example, have alternating pairs of second structures which are in contact with one another and pairs of second structures between which an open area is arranged and which are therefore arranged at a distance from one another.
  • each second structure is assigned exactly one light source, it being possible, for example, for the second structure to absorb light exclusively from the assigned light source.
  • the first structures can be illuminated by light from all light sources. At least two or more light sources are assigned to each first structure, the light of which is optically influenced by the first structure.
  • the open area between the adjacent and spaced-apart second structures is formed in such a way that part of the light from the light source impinges directly on at least one of the first structures.
  • Light that is not emitted towards the second structures can impinge on at least one of the first structures through the open area.
  • the individual light sources of the assigned second structures to have a desired Influence or adjust the luminous intensity distribution curve of the light emerging from the cover, in particular in a first plane, and the first structures influence or adjust the light distribution curve in particular in a plane perpendicular thereto.
  • the cover described here is based, among other things, on the following considerations: Light modules with high optical efficiency and good light distribution curves, which are distinguished, for example, by a particularly low UGR (Unified Glare Rating) value and therefore have particularly low glare, often do not appear homogeneous when looking at the light exit side of the cover. This means that, for example, the illuminance on a light exit side of a cover of the lighting module is inhomogeneous.
  • UGR Unified Glare Rating
  • each light source with its own optics, which are embodied as lenses, for example.
  • the viewer's homogeneity can be improved by distributing the light sources particularly homogeneously over a large area.
  • this means that the space required for the light sources is particularly large, which means, for example, that a large-area printed circuit board is required for the assembly and the electrical connection of the light sources, which leads to a particularly expensive lighting module.
  • the light is optically influenced by two types of structures, the first structures and the second structures, which are designed differently from one another.
  • a cover can, in particular, be designed in one piece and in one piece, and it is possible for such a cover to be arranged directly downstream of the light sources without a further optical element being required between a light source and the cover.
  • the different structures can set the luminous intensity distribution curves in different levels of the lighting module.
  • At least one first structure extends in the open area between the adjacent and spaced-apart second structures on the light entry side.
  • the mutually adjacent and spaced-apart structures in the open area do not border on a smooth, unstructured surface of the cover, but rather at least one of the first structures continues in the open area, for example.
  • the introduction of the first structures ensures that the light passing through breaks or scatters into the desired light intensity distribution curves, which increases the homogeneity on the light exit side of the cover. In particular, this can reduce the brightness of direct images of the light sources on the light exit side of the cover, so that areas that are too bright can be avoided.
  • the adjacent and spaced-apart second structures extend as far as a cover surface of the light source, which faces the light entry side.
  • the second structures protrude in the direction of the light sources on the light entry side of the cover.
  • the light sources each have a top surface, which is, for example, the light exit surface of the light sources.
  • the second structures are preferably only long enough in the direction of the cover surface that they do not overlap with the cover surface and/or the light source in a vertical direction, which is, for example, perpendicular to a mounting plane of the light sources. That is, the second structures are formed right up to the top surface, for example, but do not protrude beyond the top surface in the vertical direction.
  • the light sources are not enclosed by the second structures in lateral directions perpendicular to the vertical direction. This makes it easier, for example, to adjust the cover relative to the light sources, since there can be no contact between the cover, ie in particular the second structures, and the light sources. Damage to the light sources, for example sensitive light-emitting diodes, through the cover is therefore impossible.
  • the second structures it is possible for the second structures to be designed so long in the vertical direction that they overlap with the light sources and, for example, reach as far as a bottom surface facing away from the top surface.
  • the second structures are designed to direct impinging light to a light exit side. That is to say, light from the light source which enters a second structure is directed by the second structure in the direction of the light exit side of the cover which is opposite the light entry side.
  • the second structures it is possible for the second structures to be formed when using the cover in an elongate lighting module with a main extension direction for generating a desired light distribution curve in the C90°/C270° plane, i.e. in the longitudinal direction, and thus have an anti-glare effect.
  • the second structures extend at least in places along the CO°/C180° plane.
  • a light beam path of the incident light is reflected exactly once on an outer surface of a second structure before it emerges from the cover.
  • the second structures are designed to be totally reflective, for example. If a light beam path of the light emitted by an associated light source enters a second structure, it is reflected once on an outer surface of the second structure and then emerges from the cover on the light exit side.
  • the cover is less tolerance-sensitive than with multiple internal total reflections before the light exits. This means that the cover is less sensitive with regard to an adjustment of the cover relative to the light sources than a cover in which multiple total internal reflections occur on structures of the cover.
  • Light distribution curve is particularly insensitive to adjustment fluctuations. Less sensitive to tolerances also means that contour deviations, which always occur during production, for example during injection molding, will have less of an impact on the optical efficiency and the light intensity distribution curves.
  • the second structures are exclusively arranged in a central area of the cover and every second structure is on at least two sides bounded by a plurality of first structures which are spaced apart from the second structure.
  • the cover is symmetrical with respect to a longitudinal center axis or a longitudinal center curve.
  • the second structures are located—arranged along the central longitudinal axis or the central longitudinal curve—in the center of the cover and do not extend over its entire width in a direction perpendicular to the central longitudinal axis or central longitudinal curve and parallel to the mounting plane of the light source.
  • First structures are arranged on both sides of the second structures, for example parallel to the longitudinal center axis or to the longitudinal center curve, which are spaced apart from the second structure and delimit it on both sides.
  • the first structures are embodied as longitudinal lamellae, which extend completely over the cover along a main extension direction of the cover.
  • the second structures are then designed as transverse lamellae that run transversely or perpendicularly to the first structures and do not extend over the entire width of the cover.
  • the second structures have a length along their main extension direction which is, for example, at most three times the length of the light exit surface of the light source in this direction.
  • the second structures thus have an extension in this direction which is of the order of magnitude of the extension of the light source in this direction.
  • the second structures can also engage around the light source.
  • the first structures are designed to direct incident light to the light exit side by total reflection a light beam path of the impinging light is in particular reflected exactly once before it emerges from the cover. That means finding the first structures preferably no multiple reflections take place, but a light beam path of a light source hits a first structure, so it is guided by total reflection to the light exit side of the cover, with exactly one reflection being provided in particular. This in turn reduces absorption losses.
  • Light emitted by a light source can reach the first structures located further outside through the open area between second structures which are adjacent to one another and are spaced apart.
  • the first structures are shaped in such a way that this light is reflected, specifically by total reflection.
  • the first structures therefore all contribute to generating the desired light intensity distribution curve, for example in the CO°/C180° plane of the light source.
  • the first structures become larger towards the edge, it is possible to capture the full emission angle of the light source, which can be a Lambertian radiator, for example. Due to the Lambertian light intensity distribution of the light emitted by the light source during operation, images of the light source on a light exit side of the cover become darker towards the edge; this can be compensated for by increasing the maximum extension of the first structures in a vertical direction.
  • the light source which can be a Lambertian radiator, for example. Due to the Lambertian light intensity distribution of the light emitted by the light source during operation, images of the light source on a light exit side of the cover become darker towards the edge; this can be compensated for by increasing the maximum extension of the first structures in a vertical direction.
  • the first structures are embodied symmetrically or asymmetrically with respect to a plane that runs in the center of the cover parallel to the first structures and is perpendicular to a cover surface on the light exit side of the cover.
  • different first structures are designed to generate different images of the light source on the light exit side of the cover.
  • the individual first structures thus produce images on the light exit side of the cover at different points on the cover.
  • the shape of the first structures makes it possible to set the viewing angle at which these images are visible from the outside.
  • the cover comprises a fastening element, which is arranged in such a way that light from the light source, which can be arranged between the adjacent and spaced-apart second structures, does not strike the fastening element directly.
  • the fastener can be, for example, a Act dowel pin or a snap hook.
  • the fastening element is arranged along the transverse direction not in the region of the open area, but where two adjacent second structures are arranged which are in direct contact with one another. In this way, light from a light source in the open area, which is emitted in the direction of the first structures, cannot impinge on the fastening element, as a result of which optical interference from the fastening element is minimized.
  • the cover is designed in one piece.
  • the cover is formed, for example, with a radiation-transmissive matrix material that can be clear-seeingly transparent.
  • the matrix material can be, for example, a glass or a plastic such as PMMA. Particles of a light-scattering and/or a light-reflecting and/or a light-absorbing material can be introduced into the matrix material at least in places.
  • the entire cover can be formed in one piece and in one piece with these materials, so that in particular the first structures and the second structures are formed integrally with one another.
  • a corresponding cover can be produced, for example, by injection molding or transfer molding.
  • the cover is free of structuring on its light exit side, at least in the central area where the second structures are arranged on the light entry side.
  • the cover is smooth and/or flat at least there, for example.
  • the cover does not have a V-shaped ditch in cross section extends in the direction of the longitudinal central axis or longitudinal central curve of the cover. In this way, for example, dust can be removed from the cover on the light exit side in a particularly simple manner by wiping.
  • a light-emitting module is also specified.
  • the lighting module can in particular also be a lamp that can be mounted at a destination.
  • the lighting module includes in particular a cover described here. This means that all the features disclosed for the lighting module are also disclosed for the cover and vice versa.
  • the lighting module comprises a multiplicity of light sources which are designed to emit light.
  • Each of the light sources includes at least one light-emitting diode. It is possible that each light source also includes two or more light-emitting diodes.
  • the light-emitting diodes can each include at least one light-emitting diode chip or consist of a light-emitting diode chip.
  • At least some, in particular each light source is arranged between two of the adjacent and spaced second structures of the cover. This means that the light from the light sources can reach the first structures of the cover because the second structures do not completely enclose the light source laterally, but rather there is an open area in which the second structures are spaced apart from one another.
  • the light source includes two or more light-emitting diodes, these are arranged next to one another, for example.
  • the light sources can each be arranged centrally between two second structures.
  • the two second structures, which are associated with a light source, are in particular designed to be mirror-symmetrical to one another.
  • the area between the light sources and the cover is free of further optical elements. This means that there is no further optical element, for example no lens, between the light source, for example a light-emitting diode, and the cover.
  • the light source can have a curved light exit surface, which is formed, for example, by encapsulating the light-emitting diode chip or chips of the light-emitting diode of the light source. However, this curved light exit surface does not form an imaging lens, but only serves to reduce the probability of total reflection at the interface between the light exit surface and the surrounding material, in particular air.
  • the second structures are designed to direct the incident light of the light sources to the light exit side of the cover and in particular, viewed in a C90/270 plane of the lighting module, the light intensity at emission angles between +- 40° and +- 90° compared to the luminous intensity of a Lambertian distribution, in particular to reduce it by more than 25%. This significantly improves the UGR value, i.e. reduces glare.
  • FIG. 1A shows a schematic perspective view of an embodiment of a cover 10 described here.
  • the cover 10 is shown in an oblique view of the light entry side 10a of the cover 10.
  • FIG. 1A shows a schematic perspective view of an embodiment of a cover 10 described here.
  • the cover 10 is shown in an oblique view of the light entry side 10a of the cover 10.
  • the shroud 10 includes a central region 12 formed along a central longitudinal axis M of the elongate shroud 10 .
  • the cover 10 could, unlike in the Figure 1A shown, for example, also be ring-shaped.
  • the center portion 12 would then extend along a circular or elliptical longitudinal center curve.
  • the cover 10 comprises a multiplicity of first structures 1 and a multiplicity of second structures 2 on the light entry side 10a.
  • the first structures 1 run along parallel curves, which in the present case are parallel straight lines that run parallel to the longitudinal central axis. In cross section, the first structures are formed, for example, as spikes.
  • the second structures 2 run transversely to the first structures 1. As can be seen in particular from the top view of the underside of the cover 10 in the schematic representation of FIG Figure 1B As can be seen, two of the second structures 2 are arranged adjacent and spaced apart from one another, such that an open area 4 is formed between them. Due to the open area 4, in which the second structures, which are arranged adjacent and spaced apart from one another, are not in contact with one another, light from a light source 3—compare in particular the Figures 1D through 1H - Partially meet at least one of the first structures 1 directly. In other words, the light source 3 is not enclosed laterally, for example parallel to a mounting plane of the light sources 3, by the second structures 2, but there are open areas 4 towards the first structures 1. The light source 3 is therefore not directly adjacent to the first structures 1 or to the second structures 3, but for example in air.
  • the open area 4 is also in the view obliquely from below the perspective view of FIG Figure 1C visible.
  • a light source 3 the is arranged between two adjacent and spaced-apart second structures, its light 5 partially emits in the direction of the downstream second structures 2 .
  • the second structures 2 are designed for total reflection of the light passing through, such that each light beam path 51 of the light is preferably totally reflected exactly once on an outer surface of the second structure and then emerges from the cover 10 at the light exit surface 10b.
  • the light source 4 is a Lambertian emitter or approximately a Lambertian emitter.
  • the light source has a top surface 3a, which is the light exit surface, for example.
  • the second structures 2 extend up to the top surface 3a and do not overlap with the light source 3 in the vertical direction V. In this way, there can be no contact between the cover 10 and the light sources 3.
  • the second structures have, for example, a maximum length of 1.5 cm, in particular a maximum length of 1.0 cm.
  • the structures can also be designed so long that the structures grip around the light sources 3 .
  • the second structures 2 are formed, for example, on their outer surface facing away from the light source 3 in the form of an optical concentrator.
  • the outer surface can be described, for example, by parabolic, hyperbolic, elliptical or combinations of these curves.
  • the outer surfaces of the second structures 2 facing the light sources 3 can, for example, also be flat and/or smooth.
  • the second structures 2 are in the embodiment of Figures 1A to 1H arranged in the central area 12 of the cover and delimited laterally on both sides by a multiplicity of first structures 1 .
  • the Figure 1D shows in cross section from the side, the beam paths 51 of the light 5 passing through, as they result from a simulation program
  • the Figure 1E shows representative light beam paths 51 of the light 5 for improved visibility.
  • the second structures 2 are used to generate a desired light intensity distribution curve in the C90°/C270° plane, ie in the longitudinal direction, and thus act to reduce glare.
  • the second structures extend at least in places along the CO°/C180° plane.
  • the light intensity distribution curve in the C45°/C315° plane is largely determined by the contour of the second structures 2 and can be adjusted as a result.
  • the first structures 1 have maximum extensions E in the vertical direction V perpendicular to the lateral direction L, which are larger the closer a first structure is arranged to an edge 13 of the cover. In this way, as much as possible of the light from the light source 3 can be captured.
  • the Figure 1G shows, in a schematic sectional representation, representative light beam paths 51 of the light 5 which impinges on the first structures 1
  • Figure 1H indicates corresponding simulation results.
  • the individual first structures 1 are shaped in such a way that they direct incident light to the light exit side 10b of the cover 10 by total reflection and thus all generate part of the desired light intensity distribution curve in the CO°/C180° plane.
  • the individual first structures 1 generate images of the light sources 3 at different points on the cover.
  • a prismatic structure or a VDI structure can be provided towards the edges 13 , as a result of which individual images of the light sources 3 can be blurred in order to increase the homogeneity of the luminosity distribution on the light exit side 10b of the cover 10 . This can also be achieved by the targeted introduction of light-scattering particles, for example, into a matrix material of the cover 10 .
  • the light intensity distribution curve in the transverse direction i.e. in the CO°/C180° plane, is significantly more important for elongated lighting modules in particular than the light distribution curve in the longitudinal direction, the C90°/C270° plane. Due to the large distance between the light sources 3 and the first structures 1 of the cover, the lighting module is significantly less sensitive in the transverse direction with regard to tolerance fluctuations when adjusting the cover relative to the lighting means 3.
  • the Figure 1I shows resulting light intensity distribution curves 52 in the C0°/C180° plane and 53 in the C90°/C270° plane.
  • the schematic sectional view of the Figure 2A shows an embodiment of a light-emitting module described here, which in contrast to the light-emitting module Figures 1A to 1H two light-emitting diodes 31, 32 per light source 3 includes. This arrangement of several light-emitting diodes is next to each other due to the fact that the second structures do not overlap with the light source 3 in the vertical direction V, without collision between the cover 10 and the light source 3 is possible.
  • FIGS. 3A and 3B show exemplary embodiments of the covers described here, in which fastening means 6 are present on the edge 13 .
  • the fastening means 6 are, for example, snap hooks.
  • the fastening means 6 are arranged in such a way that light from the light source, which is arranged between the adjacent and spaced-apart second structures 2, does not strike the fastening means 6 directly. Rather, the fasteners 6 are there arranged where two adjacent second structures 2 are in direct contact with each other.
  • the cover has a curvature towards the edge 13 such that the cover 10 is structured in a U-trench shape in the edge area on the light exit side 10b.
  • This structuring on the outer surface makes it possible to compensate for the maximum extension E of the first structures 1, which increases towards the edge 13, in such a way that the edge thickness differences across the cover are reduced.
  • the first structures 1 have a greater extent E towards the edge, the overall edge thickness of the cover remains relatively constant. This enables a reduction in material, which can contribute to cost savings.
  • the cover is easier to produce due to smaller differences in wall thickness, for example easier to spray.
  • the cycle time for creating such a cover is lower, which in turn reduces the cost of the cover.
  • the contour deviations of the optics are also reduced with smaller wall thickness differences.
  • the first structures 1 are designed in cross section as spikes, which have a larger area than, for example, the first structures in the exemplary embodiment of FIG Figures 1A to 1H .
  • the first structures 1 are designed in cross section as spikes, which have a larger area than, for example, the first structures in the exemplary embodiment of FIG Figures 1A to 1H .
  • fewer images of the light source 3 are generated on the light exit surface 10b, but these are brighter than the images that are generated, for example, in the previous exemplary embodiments.
  • the first structures are formed in a wave-like manner. They serve to bring the light 5 into the to break or scatter the desired luminous intensity distribution.
  • the first structures 1 in the central region 12 are also designed as spikes in cross section, which can generate images of the light source 3 on the light exit surface 10b by total reflection.
  • a cover described here is particularly easy to care for due to the only slight structuring of the outer surface on the light exit side 10b, since it can be wiped off particularly well, for example.
  • Light beam paths 51 are reflected only once if possible, which means that the cover is particularly insensitive to tolerances, which has a positive effect on the light distribution curve that is generated and on the optical efficiency, and each light beam path 51 takes the shortest path through the material of cover 10, resulting in absorption in the material of cover 10 are minimized.
  • the lighting module therefore has a particularly high optical efficiency in comparison to a lighting module with many reflections that are matched to one another.
  • a lighting module with many reflections that are matched to one another is sensitive to tolerances. Contour deviations and deviations in positioning then lead to undesired scattered light.
  • the light-emitting module it is possible to equip the light-emitting module with a different number of light-emitting diodes 31, 32 without adversely affecting the luminous intensity distribution curves. A particularly homogeneous impression is obtained when viewing the light-emitting module on its light exit side 10b.
  • the open area between adjacent and spaced second structures allows the light from each light source to penetrate to the edge 13 of the cover. on In this way it is not necessary to cover the entire area below the cover with light-emitting diodes 31, 32, but the light-emitting diodes can be arranged along a narrow band exclusively in the central area 12. In this way, the circuit board area required is reduced, which also contributes to cost reduction.

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

Claims (16)

  1. Module d'éclairage avec
    - une pluralité de sources de lumière (3), qui sont conçues pour émettre de la lumière,
    - une protection (10), qui est disposée en aval des sources de lumière (3), dans lequel
    - chaque source de lumière (3) comprend au moins une diode électroluminescente (31, 32), dans lequel la protection (10) comprend :
    - un côté d'entrée de la lumière (10a),
    - une pluralité de premières structures (1) sur le côté d'entrée de la lumière (10a),
    - une pluralité de deuxièmes structures (2) sur le côté d'entrée de la lumière (10a), dans lequel
    - les premières structures (1) s'étendent le long de courbes parallèles,
    - les deuxièmes structures (2) s'étendent transversalement par rapport aux premières structures (1) et
    - au moins deux des deuxièmes structures (2) sont disposées de manière adjacente et distantes l'une de l'autre et au moins certaines, plus particulièrement chaque source de lumière (3), sont disposées entre deux deuxièmes structures (2) adjacentes et distantes entre elles, de façon à ce que la lumière (5) d'au moins une des sources de lumière (3), qui est disposée dans une zone ouverte (4) entre les deuxièmes structures (2) adjacentes et distantes, arrive en partie directement sur au moins une des premières structures (1), dans lequel
    - les deuxièmes structures (2) sont conçues pour dévier la lumière incidente (5) vers un côté de sortie de lumière (10b), qui est disposé sur le côté de la protection (10) opposé au côté d'entrée de la lumière et
    - un trajet de rayon lumineux (51) de la lumière (5) arrivant sur une des deuxièmes structures (2) est réfléchi exactement une fois sur la surface externe d'une deuxième structure (2) avant de sortir de la protection (10), caractérisé en ce que
    les premières structures (1) sont conçues pour dévier la lumière incidente (5) vers le côté de sortie de la lumière (10b) par réflexion totale.
  2. Module d'éclairage selon la revendication précédente, dans lequel, dans la zone ouverte (4), entre les deuxièmes structures adjacentes et distantes (2), s'étend au moins une première structure (1) sur le côté d'entrée de la lumière (10a).
  3. Module d'éclairage selon l'une des revendications précédentes, dans lequel les deuxièmes structures adjacentes et distantes (2) s'étendent jusqu'à une surface de recouvrement (3a) de la source de lumière (3) qui est orientée vers le côté d'entrée de la lumière (10a).
  4. Module d'éclairage selon l'une des revendications précédentes, dans lequel les deuxièmes structures adjacentes et distantes (2) ne se superposent pas avec la source de lumière (3) dans une direction verticale (V).
  5. Module d'éclairage selon l'une des revendications précédentes, dans lequel les deuxièmes structures (2) sont en nombre pair et sont disposées plus particulièrement par paires.
  6. Module d'éclairage selon l'une des revendications précédentes, dans lequel les deuxièmes structures (2) sont disposées par paires et sont réalisées de manière symétrique en miroir les unes par rapport aux autres dans chaque disposition par paire.
  7. Module d'éclairage selon l'une des revendications précédentes, dans lequel les deuxièmes structures (2) sont disposées exclusivement dans une zone centrale (12) de la protection (10) et chaque deuxième structure est délimitée sur au moins deux côtés par une pluralité de premières structures (1), qui sont disposées à une certaine distance de la deuxième structure (2).
  8. Module d'éclairage selon l'une des revendications précédentes, dans lequel un trajet de rayon lumineux (51) de la lumière (5) arrivant sur une des premières structures (1) est réfléchi exactement une fois sur une des premières structures (1) avant de sortir de la protection (10).
  9. Module d'éclairage selon l'une des revendications précédentes, dans lequel l'extension maximale (E) d'une première structure (1) dans une direction verticale (V) est d'autant plus grande que la première structure (1) est proche d'un bord (13) de la protection (10).
  10. Module d'éclairage selon l'une des revendications précédentes, dans lequel différentes premières structures (1) sont réalisées afin de générer différentes représentations de la source de lumière (3) sur le côté de sortie de la lumière (10b) de la protection (10).
  11. Module d'éclairage selon l'une des revendications précédentes, dans lequel la protection (10) comprend un élément de fixation (6), dans lequel l'élément de fixation (6) est disposé de façon à ce que la lumière (5) de la source de lumière (3) qui peut être disposée entre les deuxièmes structures adjacentes et distantes (2) n'arrive pas directement sur l'élément de fixation (6).
  12. Module d'éclairage selon l'une des revendications précédentes, dans lequel la protection (10) est réalisée d'une seule pièce.
  13. Module d'éclairage selon l'une des revendications précédentes, dans lequel la protection (10) est exempte de structurations au niveau de son côté de sortie de la lumière (10b) au moins dans la zone centrale (12).
  14. Module d'éclairage selon l'une des revendications précédentes, qui est exempt d'éléments optiques entre les sources de lumière et la protection (10).
  15. Module d'éclairage selon l'une des revendications précédentes,
    dans lequel les deuxièmes structures (2) sont conçues pour dévier la lumière incidente (5) des sources de lumière (3) vers un côté de sortie de la lumière (10b) de la protection (10) et, plus particulièrement, dans un plan C90/270 du module d'éclairage, pour réduire nettement l'intensité lumineuse pour des angles de sortie entre ±40° et ±90° par rapport à l'intensité lumineuse d'une répartition lambertienne, plus particulièrement de plus de 25 %.
  16. Module d'éclairage selon la revendication précédente, dans lequel les premières structures (1) et les deuxièmes structures (2) forment un corps de répartition de l'intensité lumineuse ovale.
EP18202403.4A 2017-10-27 2018-10-24 Couvercle pour un module lumineux et module lumineux Active EP3477193B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017125236.3A DE102017125236A1 (de) 2017-10-27 2017-10-27 Abdeckung für ein Leuchtmodul und Leuchtmodul

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EP3477193A1 EP3477193A1 (fr) 2019-05-01
EP3477193B1 true EP3477193B1 (fr) 2022-08-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022124745A1 (de) 2022-09-27 2024-03-28 Zumtobel Lighting Gmbh Optisches Element mit Kaschierungsabschnitt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3101695B1 (fr) * 2019-10-08 2023-01-06 Dav Système optique, et élément optique de mise en forme d’un faisceau optique et dispositif d’éclairage, de signalisation et/ou à vocation cosmétique correspondants

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007013082A1 (de) 2007-03-14 2008-09-18 Hella Kgaa Hueck & Co. Signalleuchte
DE102013226181B4 (de) * 2013-12-17 2021-01-28 Zumtobel Lighting Gmbh Optisches Element, sowie Anordnung zur Lichtabgabe
DE102014202461A1 (de) * 2014-02-11 2015-08-13 Zumtobel Lighting Gmbh Längliche mehrteilige Linsenanordnung sowie Leuchte mit einer solchen Linsenanordnung
DE202014101954U1 (de) * 2014-04-25 2015-07-28 Zumtobel Lighting Gmbh Optisches Element für eine LED, LED-Anordnung mit einem solchen optischen Element, sowie Leuchte mit einer solchen LED-Anordnung
DE102015114310A1 (de) * 2015-08-28 2017-03-02 Itz Innovations- Und Technologiezentrum Gmbh Optisches Element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022124745A1 (de) 2022-09-27 2024-03-28 Zumtobel Lighting Gmbh Optisches Element mit Kaschierungsabschnitt

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EP3477193A1 (fr) 2019-05-01

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