EP3500794B1 - Beleuchtungseinheit für einen kraftfahrzeugscheinwerfer zum erzeugen von zumindest zwei lichtverteilungen - Google Patents

Beleuchtungseinheit für einen kraftfahrzeugscheinwerfer zum erzeugen von zumindest zwei lichtverteilungen Download PDF

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Publication number
EP3500794B1
EP3500794B1 EP17757667.5A EP17757667A EP3500794B1 EP 3500794 B1 EP3500794 B1 EP 3500794B1 EP 17757667 A EP17757667 A EP 17757667A EP 3500794 B1 EP3500794 B1 EP 3500794B1
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EP
European Patent Office
Prior art keywords
light
reflector
lighting unit
facet elements
surface area
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Active
Application number
EP17757667.5A
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German (de)
English (en)
French (fr)
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EP3500794A1 (de
Inventor
Markus Ecker-Endl
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ZKW Group GmbH
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ZKW Group GmbH
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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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/27—Thick lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lighting unit for a motor vehicle headlight for generating at least two, in particular different, light distributions (claims 1-13).
  • the invention further relates to a lighting device for a motor vehicle headlight (claim 14) which comprises one or more lighting units according to the invention.
  • the invention also relates to a motor vehicle headlight (claim 15) which comprises at least one lighting unit according to the invention and / or at least one lighting device according to the invention.
  • a lighting unit or a lighting device in connection with the present invention can be used in a motor vehicle headlight to implement one or, in particular, two or more light distributions.
  • Examples of such light distributions in connection with the present invention which can be generated by a lighting unit or lighting device according to the invention are: high beam distribution, partial high beam distribution, direction indicators, daytime running lights.
  • a lighting unit according to the invention or a lighting device according to the invention can be set up to generate a combination of high beam or partial high beam and direction indicator.
  • a lighting unit according to the invention or a lighting device according to the invention can be set up to generate a combination of daytime running lights and direction indicators.
  • a lighting unit according to the invention or a lighting device according to the invention can be set up to generate a combination of high beam and daytime running lights. If the daytime running lights are operated dimmed in such a lighting unit, a limiting light can be generated in this way and thus the combination limiting light and high beam can also be implemented.
  • a lighting unit mentioned at the beginning can also be set up to generate two lighting functions and / or signaling functions with a single light-permeable body.
  • EP 1 794 490 B1 and DE 10 2014 205 994 A1 disclose lighting devices for motor vehicle headlights.
  • the reflector has a first reflector surface area which receives light exclusively from the at least one first light source, and the reflector has a second reflector surface area which exclusively receives light receives from the at least one second light source, and wherein the exit lens has a first exit lens area which receives light exclusively from the first reflector surface area, and the exit lens has a second exit lens area which receives light exclusively from the second reflector surface area , and wherein light emitted via the first exit lens area is imaged as a first light distribution and light emitted via the second exit lens area is imaged as a second light distribution.
  • a segmented light distribution can also be generated, i.e. each light distribution generated with the lighting unit forms a light segment of an overall light distribution.
  • the light distribution generated can, however, also be part of an overall light distribution, for example in that each light distribution generates the shape of the overall light distribution, and the totality of all light distributions then provides the necessary light intensity in the light image.
  • these light distributions described above can also be generated if two or more lighting units form a lighting device which can form these light distributions described above.
  • the light sources each comprise one or more LEDs, the light sources (so-called “LED light sources”) preferably each being single-chip LEDs.
  • the exit lens is designed as a flat or planar surface.
  • the planar surface can also be curved, for example, but preferably without unevenness. It is advantageously provided that the planar surface is at least G1-continuous.
  • the exit lens extends at an angle of 90 ° to a light exit plane of at least one collimator.
  • the reflector is designed as a flat surface.
  • the reflector runs at an angle of 45 ° to a light exit plane of at least one collimator.
  • the light exit planes of all collimators can run parallel to each other, accordingly in this case the reflector is arranged at 45 ° to all light exit planes of collimators, and the exit lens is arranged at 90 ° to all light exit planes of the collimators.
  • the exit lens extends at an angle of 45 ° to the reflector.
  • the first reflector surface area has a structure, for example in that the first reflector surface area is divided into facets, by means of which structuring the light beams reflected by the reflector surface area in the vertical and / or horizontal direction to generate the first light distribution to get distracted.
  • the light distribution generated by means of the first reflector surface area [corresponds to light bundle S1 in the figures] can be optimally adapted.
  • the second reflector surface area has a structuring, for example by dividing the second reflector surface area into facets, by means of which structuring the light beams reflected by the reflector surface area are generated in the vertical and / or horizontal direction the second light distribution are deflected.
  • the light distribution generated by means of the second reflector surface area [corresponds to light bundle S2 in the figures] can be optimally adapted.
  • both reflector surface areas have a structure, in particular facets
  • the structures, in particular the facets, of the two reflector surface areas are designed differently.
  • the first reflector surface area has one or more rows of facet elements running transversely, in particular in the horizontal direction.
  • adjacent facet elements in one row and / or facet elements in adjacent rows merge discontinuously into one another.
  • all facet elements are convex or concave or some of the facet elements are convex and another part is concave, or at least all facet elements of a row or all facet elements are convex or at least all facet elements of a row or all facet elements are concave or the Facet elements of at least one row, preferably all rows, are alternately convex-concave.
  • the second reflector surface area has one or more rows of facet elements running transversely, in particular in the horizontal direction.
  • all facet elements are convex or concave or some of the facet elements are convex and another part is concave, or at least all facet elements of a row or all facet elements are convex or at least all facet elements of a row or all facet elements are concave or the facet elements at least one row, preferably all rows, are alternately convex-concave.
  • the radiation cone of the emitted light depends on the curvature of the respective facet, a smaller curvature for (in the far field) to a smaller radiation cone. Smaller radiation cones lead to a concentration of the luminous flux, for example in the horizontal direction.
  • Convex-curved facets can improve the homogeneity of the light distribution, concave-curved facets can be molded better using injection molding tools.
  • the luminous flux from the at least one collimator which is assigned to the at least one first light source, runs normally to an exit plane of the collimator.
  • the at least one collimator which is assigned to the at least one second light source, when the lighting unit is installed in a vehicle, the luminous flux of the second light source in a first, vertical direction is essentially parallel, and fans out in a second, horizontal direction.
  • a separation into the first reflector surface area and the second reflector surface area runs horizontally when the lighting unit is installed in a vehicle.
  • the invention further relates to a lighting device for a motor vehicle headlight (claim 14) which comprises one or more lighting units described above.
  • a lighting unit described above is able to implement a large number of combinations of different light distributions. However, it can happen that the illuminance levels that can be achieved with just one lighting unit are too low to achieve the minimum values required by law. With a lighting device that comprises two or more corresponding lighting units, the required values of the illuminance can be achieved if the number of lighting units is selected such that they can deliver the required luminous flux.
  • a lighting device with two or more lighting units according to the invention is also useful when a segmented light distribution is to be generated.
  • each LED light source of a lighting unit generates a light segment of a light distribution, with either each LED light source of a lighting unit contributing to a different segmented (overall) light distribution (the lighting device in this case is set up to provide two different segmented overall light distributions which can be switched on and off independently of each other), or both / all LED light sources of a lighting unit contribute to a single (overall) light distribution, ie the lighting device is set up to generate only a single segmented overall light distribution.
  • the invention also relates to a motor vehicle headlight (claim 15) with at least one lighting unit described above or with at least one lighting device described above.
  • top In the context of this description, the terms “top”, “bottom”, “horizontal”, “vertical” are to be understood as indicating the orientation when the unit is arranged in the normal position of use after it has been installed in a lighting device mounted in the vehicle.
  • Figure 1 shows a lighting unit 100 according to the invention for a motor vehicle headlight for generating two light distributions, in particular two different light distributions. It is assumed below that the illustrated lighting unit 100 is set up to generate a first overall light distribution in the form of a high beam distribution and a second overall light distribution in the form of a daytime running light distribution. Other combinations can also be implemented with an illustrated lighting unit 100, as will be discussed in more detail below.
  • the lighting unit 100 comprises a first light source 1 for generating the first light distribution, i.e. the high beam distribution, and three second light sources 2 for generating the second light distribution, i.e. the daytime running light distribution.
  • the lighting unit 100 comprises a reflector 3, an exit lens 4, for example in the form of a projection lens, and collimators 5, 6a, 6b, 6c into which the light sources 1, 2 feed light when they are activated.
  • each light source 2 is assigned exactly one collimator into which the respective light source couples its light.
  • Light from the second light sources 2 is coupled into the collimators 6a, 6b, 6c assigned to them by the second light sources 2, when the light sources 2 are switched on, and are each aligned to form a second light bundle.
  • three second, preferably overlapping, light bundles are generated, with which the second light distribution is generated jointly.
  • the reflector 3 deflects the light beams of the light bundles emerging from the collimators 5, 6a, 6b, 6c in the direction of the exit lens 4, and the exit lens 4 images the light beams reflected by the reflector 3 in the form of the first and second light distribution.
  • the exit lens 4 can be flat and the rays reflected by the reflector 3 preferably strike the flat exit lens 4 normally so that they can pass through it without further deflection.
  • - light only passes through the exit lens 4 and is refracted in the process.
  • the actual light shaping is done by the reflector.
  • the width of the resulting light distribution can, for example, be adapted / set.
  • Reflector 3, exit lens 4 and collimators 5, 6a, 6b, 6c are formed from a translucent, preferably one-piece body 101 - also referred to as "optic body" - on the reflector boundary surface 3 'of the reflector 3 and on the collimator boundary surfaces 5 ', 6a', 6b ', 6c' of the collimators 5, 6a, 6b, 6c, the light rays propagating in the transparent body 101 are totally reflected.
  • the reflector 3 has a first reflector surface area 30, which receives light exclusively from the first light source 1, and a second reflector surface area 31, which receives light exclusively from the second light source 2.
  • the exit lens 4 has a first exit lens area 40, which receives light exclusively from the first reflector surface area 30, and a second exit lens area 41, which receives light exclusively from the second reflector surface area 31.
  • the two reflector surface areas 30, 31 and the two exit lens areas 40, 41 are preferably separated by a horizontally running separation (separating line) 300, 400, that is to say they lie vertically, possibly offset, one above the other.
  • Light emitted via the first exit lens area 40 is imaged as the first light distribution, in this example as a high beam distribution, and light emitted via the second exit lens area 41 is imaged as a second light distribution, in this example as a daytime running light distribution.
  • An advantage of the invention in the general, general context, ie not limited to the present embodiment, is that two or more light distributions can be generated with a single optic body in which coupled light propagates via total reflection do not influence the different light distributions and can also be designed independently of one another.
  • the light sources 1, 2 preferably each comprise a light-emitting diode or a plurality of light-emitting diodes, and the light sources 1, 2 for each light distribution can be controlled independently of one another, i.e. in particular switched on and off. It can also be provided that the light sources 1, 2 - again not limited to the embodiment shown, but also in the most general sense of the invention - can be dimmed, in particular also dimmed independently of one another.
  • the light-permeable material from which the body 100 is formed for example a plastic, preferably has a refractive index greater than that of air.
  • the material contains, for example, PMMA (polymethyl methacrylate) or PC (polycarbonate) and is particularly preferably formed therefrom.
  • the exit lens 4 is designed as a flat surface
  • the exit lens 4 extends at an angle of 90 ° to at least one light exit plane of a collimator 5, 6a, 6b, 6c or 5, 6.
  • the reflector 3 is designed as a flat surface in terms of its basic shape. As will be explained below, structuring can be provided on this flat surface.
  • the reflector 3 extends at an angle of 45 ° to at least one light exit plane of a collimator 5, 6a, 6b, 6c or 5, 6.
  • the light exit planes of all collimators can run parallel to each other, as is the case in the embodiments shown, and accordingly in this case the reflector is arranged at 45 ° to all light exit planes of collimators, and the exit lens is arranged at 90 ° to all light exit planes of the collimators .
  • the exit lens 4 extends at an angle of 45 ° to the reflector 3.
  • the Figures 3 and 4th show on the basis of a section AA Figure 2 nor the beam path in the optic body 101: Light from the first light source 1, when it is switched on, is coupled into the associated collimator 5 and aligned by this to form a first light bundle S1.
  • the light bundle S1 generated by the collimator 5 is preferably a light bundle of parallel light rays ( Figure 3 ).
  • the light bundle S2 generated by the collimator 6 is preferably a light bundle of parallel light rays ( Figure 4 ).
  • the reflector 3 deflects the light beams of the light bundles S1, S2 emerging from the collimators 5, 6 in the direction of the exit lens 4, and the exit lens 4 images the light beams reflected by the reflector 3 in the form of the first and second light distribution.
  • the first exit lens area 40 receives light exclusively from the first reflector surface area 30 ( Figure 3 )
  • the second exit lens area 41 receives light exclusively from the second reflector surface area 31 ( Figure 4 ).
  • the exit lens 4 can be flat and the rays reflected by the reflector 3 preferably strike the flat exit lens 4 normally so that they can pass through it without further deflection.
  • this function can also be implemented by an exit lens, and the term “imaging” in this text can also be understood to mean that light passes through the exit lens without further deflection.
  • the reflector generates a single parallel beam.
  • the reflector also emits diverging rays which then do not strike the, in particular flat, interface / exit lens at less than 90 °, so that the described relationship that the light rays are not deflected then does not apply.
  • the exit lens then deflects the rays accordingly and "projects" a light distribution into the traffic area.
  • the at least one collimator 5 which is assigned to the at least one first light source 1, directs the luminous flux of the first light source 1 essentially in parallel, with the luminous flux preferably running normally on an exit plane of the collimator 5.
  • the at least one collimator 6; 6a, 6b, 6c which is assigned to the at least one second light source 2, directs the luminous flux of the second light source 2 in a first, vertical direction essentially parallel, and fans it out in a second, horizontal direction.
  • the reflector 3, ie in particular the first reflector surface area 30, has a structuring, for example in that the first reflector surface area 30 is divided into facets, by means of which structuring the Area 30 reflected light beams can be deflected in the vertical and / or horizontal direction to generate the first light distribution.
  • the light distribution generated by means of the first reflector surface area can be optimally adapted.
  • the second reflector surface area 31 has a structuring, for example in that the second reflector surface area 31 is divided into facets, by means of which structuring the light rays reflected by the reflector surface area 31 are vertically and / or horizontally Direction for generating the second light distribution are deflected.
  • the light distribution generated by means of the second reflector surface area can be optimally adapted.
  • FIG. 12 shows a first example of such a structuring, in which both reflector surface areas have a structuring, in particular facets, the structuring, in particular the facets, of the two reflector surface areas 30, 31 being designed differently.
  • the amplitudes are both in the Figures 5a as well as 5b drawn out strongly exaggerated.
  • Figure 5 and Figure 5b showing the cut DD from Figure 5 shows a first reflector surface area 30 with a number of facet elements 30 '(high beam).
  • Figure 5 and Figure 5a showing the cut CC from Figure 5 shows a second reflector surface area 31 with two horizontal rows of facet elements 31 '(daytime running lights).
  • Figure 6 with the cuts EE ( Figure 6a , Daytime running lights) and FF ( Figure 6b , High beam) shows another basic design option.
  • the light image is preferably formed via the reflector and the exit lens preferably only serves as a light exit surface, which allows the light to exit from the optic body 101 either without deflection or with deflection depending on the angle of incidence.
  • concave facets can be used to make the radiation cones overlap, so that the homogeneity of the light distribution generated increases. This applies both to the light distribution that occurs in the far field and to the light impression that an observer of the lighting unit or the motor vehicle headlight has.
  • a lighting unit according to the invention for example as described in the embodiments, but also in the general inventive context, two mutually independent light distributions can be generated with one optical body.
  • a combination of high beam and daytime running lights can be generated. If the light sources are sufficiently strong, a lighting unit can generate these light distributions on its own. Otherwise there will be two or more identical or largely identical lighting units are combined to form a lighting device which supplies the necessary luminous flux for legally compliant light distributions.
  • any combination of light distributions can be generated, for example a combination of high beam and direction indicator (blinker), in particular in the form of a wiper blinker.
  • the first light sources generate e.g. the high beam distribution and the second light sources the flashing light, whereby the second light sources can also be switched on one after the other to generate a wiper indicator with which the direction of the turning process can be displayed .
  • each exit lens area of a light distribution generates only one segment of this light distribution, so that a segmented light distribution, e.g. a segmented high beam distribution, can be generated.
  • a lighting unit according to the invention is in principle able to implement a large number of combinations of different light distributions.
  • the illuminance levels that can be achieved with just one lighting unit are too low to achieve the minimum values required by law.
  • the required values of the illuminance can be achieved if the number of lighting units is selected such that they can deliver the required luminous flux.
  • a lighting device with two or more lighting units according to the invention is also useful when a segmented light distribution is to be generated.
  • each LED light source of a lighting unit generates a light segment of a light distribution, with either each LED light source of a lighting unit contributing to a different segmented (overall) light distribution (the In this case, the lighting device is set up to generate two different segmented overall light distributions that can be switched on and off independently of each other), or both LED light sources of a lighting unit contribute to a single (overall) light distribution, ie the lighting device is set up to generate only a single segmented overall light distribution.
  • FIG. 7 shows an example of such a lighting device 1000.
  • this consists of four lighting units 100, which again each have first light sources 1 and second light sources 2 as described above.
  • first light sources 1 and second light sources 2 as described above.
  • no further optical elements are preferably connected downstream of a lighting unit or lighting device according to the invention.
  • an additional imaging lens is connected downstream of one or each lighting unit or a lighting device.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP17757667.5A 2016-08-19 2017-07-31 Beleuchtungseinheit für einen kraftfahrzeugscheinwerfer zum erzeugen von zumindest zwei lichtverteilungen Active EP3500794B1 (de)

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ATA50749/2016A AT518552B1 (de) 2016-08-19 2016-08-19 Beleuchtungseinheit für einen Kraftfahrzeugscheinwerfer zum Erzeugen von zumindest zwei Lichtverteilungen
PCT/AT2017/060193 WO2018032025A1 (de) 2016-08-19 2017-07-31 Beleuchtungseinheit für einen kraftfahrzeugscheinwerfer zum erzeugen von zumindest zwei lichtverteilungen

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EP3500794A1 EP3500794A1 (de) 2019-06-26
EP3500794B1 true EP3500794B1 (de) 2021-11-10

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US (1) US10605428B2 (ja)
EP (1) EP3500794B1 (ja)
JP (1) JP6842532B2 (ja)
KR (1) KR102278912B1 (ja)
CN (1) CN109563974B (ja)
AT (1) AT518552B1 (ja)
ES (1) ES2902514T3 (ja)
WO (1) WO2018032025A1 (ja)

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US10605428B2 (en) 2020-03-31
AT518552B1 (de) 2017-11-15
WO2018032025A1 (de) 2018-02-22
KR20190040269A (ko) 2019-04-17
KR102278912B1 (ko) 2021-07-20
CN109563974B (zh) 2021-08-31
US20190186708A1 (en) 2019-06-20
CN109563974A (zh) 2019-04-02
EP3500794A1 (de) 2019-06-26
JP2019525431A (ja) 2019-09-05
ES2902514T3 (es) 2022-03-28
AT518552A4 (de) 2017-11-15
JP6842532B2 (ja) 2021-03-17

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