EP3803195B1 - Dispositif d'éclairage pour un phare de véhicule automobile - Google Patents

Dispositif d'éclairage pour un phare de véhicule automobile Download PDF

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Publication number
EP3803195B1
EP3803195B1 EP19723421.4A EP19723421A EP3803195B1 EP 3803195 B1 EP3803195 B1 EP 3803195B1 EP 19723421 A EP19723421 A EP 19723421A EP 3803195 B1 EP3803195 B1 EP 3803195B1
Authority
EP
European Patent Office
Prior art keywords
light
holder
illumination device
primary optics
light guide
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
EP19723421.4A
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German (de)
English (en)
Other versions
EP3803195A1 (fr
Inventor
Lukas Taudt
Nina Brauner
Mathias SCHRAGL
Christoph Längauer
Johann Höfler
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.)
ZKW Group GmbH
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ZKW Group GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP3803195A1 publication Critical patent/EP3803195A1/fr
Application granted granted Critical
Publication of EP3803195B1 publication Critical patent/EP3803195B1/fr
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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
    • F21S41/60—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
    • 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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel 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
    • F21S41/20—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
    • F21S41/29—Attachment thereof
    • 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
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • 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
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • 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

Definitions

  • the invention relates to a lighting device for a motor vehicle headlight having the features of the preamble of claim 1.
  • the invention also relates to a light module with at least one lighting device according to the invention (see claim 12).
  • the invention also relates to a motor vehicle headlight with at least one lighting device according to the invention or with at least one light module with at least one lighting device according to the invention (see claim 13).
  • the WO 2013/166535 , the WO 2015/061822 , the WO 2014/124477 , the WO 2014/012128 , the EP 3 339 720 and the WO 2014/094018 show lighting devices for motor vehicle headlights from the prior art.
  • the above lighting devices are associated with Light modules or motor vehicle headlights used to light distributions generate.
  • primary optics made of glass are generally used, with which simple geometries for primary optics can be implemented. If, on the other hand, more complex geometries are necessary for a primary optic, the use of glass is often unsuitable for this.
  • the disadvantage of using such plastics, in particular silicone, for the production of primary optics is that such a primary optic does not have the strength of a glass body. From an optical point of view, however, it is advantageous or necessary for the primary optics to have a shape that is as stable as possible, particularly with regard to the positioning of its light entry surface or surfaces in relation to an illuminant or light source. An offset of the light entry surfaces in relation to the lighting means or light sources, particularly when using light-emitting diodes as light sources, leads, for example, to undesired light losses.
  • a misalignment of the light exit surfaces of the attachment optics can mean that the light image shown does not meet the desired requirements.
  • the lighting device is a "pixel light device” with the light sources arranged in rows and columns.
  • the light sources can be controlled independently of one another, as a result of which different light distributions can be generated, in particular an adaptive high beam light distribution.
  • the counter-locking element is designed as a locking lug or as an undercut.
  • the at least one latching element has a latching lug and the counter-latching element is designed as an undercut.
  • a plurality of undercuts can be arranged along the longitudinal axis of the primary optics.
  • locking elements are arranged on the holder.
  • At least two latching elements each with an associated undercut, can preferably be provided.
  • undercuts or corresponding locking elements are arranged above or below the light exit surface or the light sources, with "above”/"below” referring to the already mentioned longitudinal axis of the primary optics transverse to the main emission direction of the light sources in the assembled state of the lighting device.
  • the "main emission direction” is to be understood as meaning the direction in which the light sources emit the strongest or most light due to their directivity.
  • the latching element is designed as an undercut and the counter-latching element has a latching lug.
  • the holder is made of a thermoplastic.
  • thermoplastics can be shaped better or more easily.
  • the holder is made of a material that shades stray light, i.e. an opaque material, e.g. black plastic, in particular - for example black - thermoplastic, so that stray light is sealed off in particular from neighboring light sources.
  • an opaque material e.g. black plastic, in particular - for example black - thermoplastic
  • a further, alternative or preferably additional measure to avoid light loss into the position holder is that the position holder is designed in such a way that the contact surface of a light guide body (or the light guide body) with the position holder is as small as possible.
  • the light-guiding body thus makes contact with the position holder only in a narrow contact area, for example in a line running around the respective light guide.
  • the primary optics can be made in one piece from a transparent, light-conducting and moldable plastic.
  • In one piece is to be understood as meaning production of the primary optics from one piece, preferably by means of an injection molding process.
  • the primary optics with all of its “components”, for example the light exit surface, the fiber optics, the counter-locking elements and other “components” arranged on the primary optics have been manufactured in one piece or in one piece in a manufacturing process or method.
  • the primary optics can be made of a silicone material.
  • the primary optic Due to the elastomer properties of a silicone material, it is possible to demould the primary optic without an additional slide, since the primary optic is preferably produced by means of an injection molding process.
  • the primary optics are made of a poly(organo)siloxane.
  • the individual fiber optics can be held particularly well in their position in relation to the light sources if the holder has an opening for each fiber optic body in which the associated fiber optic body is accommodated and positioned with a precise fit.
  • the openings are holes or receptacles in the holder, with a cross-section that is precisely adapted for the respective fiber-optic element; these are inserted into the associated openings and held in the desired position by the holder.
  • the holder accommodates the light guide bodies at their end regions facing the light entry surfaces.
  • the fiber-optic elements can protrude slightly backwards out of the mount or can be flush with the holder.
  • the holder has at least one positioning wall that protrudes in the main emission direction and is set up to engage in a recess provided on the primary optics.
  • wall is to be understood not only as a projection in one plane. This term can also mean a combination of several flat walls, which are arranged, for example, at right angles to one another and/or form a kind of open square, i.e. together form a U-shape.
  • the at least one positioning wall generally ensures further stability of the primary optics in the assembled state of the lighting device, so that oscillation transverse to the main emission direction of the light sources can be largely avoided.
  • At least one projection is arranged on the at least one positioning wall, which projection extends longitudinally in the direction of the main emission direction and is set up to positively engage in a guide groove in the primary optics associated with the at least one projection.
  • the at least one projection brings about additional stability when the primary optics is in the fastened state on the holder.
  • a material is inserted in the openings between the holder and the light-guiding bodies, which has a lower refractive index than the material of the light-guiding bodies.
  • the material with a lower refractive index surrounds the light guide bodies in such a way that they do not touch the position holder.
  • the fiber-optic elements can be elongate, with a greater extension in the main emission direction of the light beams than transversely thereto.
  • the holder can only be slid onto the light-guiding bodies up to a certain point.
  • the light-guiding bodies are designed in the shape of a truncated cone or a trapezium.
  • all multi-sided truncated pyramids are possible, e.g. hexagonal, for example in the form of wedge-shaped honeycombs.
  • the footprint shape is closely related to the LED chip arrangements and the desired light entry and exit.
  • the light sources each include one or more light-emitting diodes.
  • each light source can preferably be controlled separately and switched on and off accordingly, preferably also dimmable. If a light source consists of several light-emitting diodes, it can also be advantageous if each of the light-emitting diodes can be controlled separately.
  • the object is also achieved by a light module with at least one lighting device according to the invention.
  • the object is achieved with a motor vehicle headlight having at least one lighting device according to the invention or a light module having at least one lighting device according to the invention.
  • a low beam and/or a high beam can be generated, for which, for example, the left headlight and the right headlight each have a lighting device according to the invention, with which the left and the right part of the light distribution are generated.
  • a secondary optics usually a lens, is also provided, by means of which the respective light distribution can be generated.
  • the lighting device according to the invention can also be used for a reversing light.
  • FIG. 1 shows an exemplary lighting device, which has several light sources 10 that are set up to emit light beams in a main emission direction, a primary optics 100 with several light guide bodies 110, which light guide bodies 110 are arranged in the main emission direction of the light sources 10 and each have a light entry surface 120 and a light exit surface 130 , and a holder 200 , which holder 200 is set up to hold the light entry surfaces 120 of the light guide bodies 110 in relation to the light sources 10 in position. Furthermore, the light guide bodies 110 open into a common light exit surface 130.
  • the light sources 10 each include one or more light-emitting diodes, with each light source preferably including one or more light-emitting diodes. Each light source can preferably be controlled separately and switched on and off accordingly, preferably also dimmable If a light source consists of several light-emitting diodes, it can also be advantageous if each of the light-emitting diodes can be controlled separately.
  • the “main emission direction” is generally to be understood as meaning the direction in which the light sources 10 emit the strongest or most light as a result of their directivity. In the figures shown, the main emission direction corresponds to the x-direction of the coordinate system drawn in the figures.
  • the holder 200 has two latching elements 210 formed with a latching lug 220 , the latching lugs being set up to engage in an undercut 140 respectively assigned to the latching lugs, which undercut 140 is arranged on the primary optics 100 , but in 1 cannot be seen because of the view.
  • the latching elements 210 are produced in one piece with the holder 200 .
  • the primary optics 100 is made from a transparent, light-conducting and moldable plastic, preferably from a silicone material or a poly(organo)siloxane.
  • the holder 200 has a receiving section 230 with openings 231 provided corresponding to the number of light guide bodies, which openings 231 are each assigned to a light guide body 110 and in which the light guide bodies 110 of the primary optics 100 can be received and positioned, the holder 200 the Optical fiber 110 accommodates at its end portion facing the light entry surfaces 120 .
  • the holder 200 has two positioning walls 240 protruding in the main emission direction or x-direction, which are set up to engage in a depression provided on the primary optics 100 .
  • a “positioning wall” is not just to be understood as a projection in one plane. This term can also refer to a combination of several levels Walls that are connected to each other, preferably at their respective lateral end edges, as shown in the exemplary lighting device in the figures.
  • the individual walls are at right angles to one another and form a kind of open cart or a U-shape, with the connecting edge areas being able to be rounded off.
  • the individual walls of a positioning wall 240 do not have the same height, with gradual height differences or gradients in 1 you can see.
  • the positioning walls 240 generally ensure further stability of the primary optics 100 in the assembled state of the lighting device, so that oscillation transverse to the main emission direction or oscillation in the y-direction can be largely avoided.
  • projections 241 can be arranged on the positioning walls 240 , which projections 241 extend longitudinally in the direction of the main emission direction or x-direction and are set up to positively engage in a guide groove assigned to the projections 241 in the primary optics 100 . Such projections 241 bring about additional stability when the primary optics 100 is fastened to the holder 200.
  • the positioning walls 240 are each arranged laterally or along the y-axis of the receiving section 230 , with the open sides of the positioning walls 240 being aligned with one another and partially delimiting or delimiting the receiving section 230 .
  • FIG. 12 shows a rear view of the lighting device 1 , where in 2 it can be seen that the fiber-optic elements 110 in the lighting device shown are elongate, with a greater extension in the main emission direction of the light beams or the x-axis than transversely thereto.
  • the light guide bodies 110 have a cross section that tapers towards their light entry surfaces 120 .
  • the holder 200 can only be slid onto the light-guiding bodies 110 up to a certain point.
  • FIG. 3 shows the assembled state of the lighting device from the previous figures, where Figure 3a Figure 12 is a cross-sectional view along section CC.
  • Figure 12 is a cross-sectional view along section CC.
  • the individual fiber-optic elements 110 are accommodated and positioned with a precise fit in the openings 231 .
  • the openings 231 are holes or receptacles in the holder, with a cross-section that is precisely adapted for the respective fiber-optic element 110; these are inserted into the associated openings 231 and can protrude slightly backwards out of the openings 231 , as in Figure 3a can be seen, or flush with the holder 200 or with the openings 231 .
  • the light module 4 shows an exemplary light module with a lighting device from the previous figures, the light module additionally having a printed circuit board 11 on which the light sources 10 are arranged, a heat sink 500, which is designed to dissipate the heat generated during operation of the light sources, secondary optics 300 and a Housing 400, which is provided for accommodating the remaining components, the secondary optics being set up to shape the light beams emanating from the light exit surface 130 of the lighting device in order to obtain a desired light distribution, for example a low beam and/or a high beam distribution, with other or further light distributions are possible.
  • a desired light distribution for example a low beam and/or a high beam distribution, with other or further light distributions are possible.
  • the printed circuit board 11 containing the light sources 10 is held between the heat sink 500 and the holder 200 , with pins arranged on the heat sink passing through the printed circuit boards through openings provided for this purpose.
  • circuit board 11 primary optics 100 fiber optic body 110 light entry surface 120 light exit surface 130 undercut 140 holder 200 locking element 210 detent 220 recording section 230 opening 231 positioning wall 240 head Start 241 secondary optics 300 Housing 400 heatsink 500

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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)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Planar Illumination Modules (AREA)

Claims (13)

  1. Dispositif d'éclairage pour un projecteur de véhicule automobile, lequel dispositif d'éclairage comprend :
    - une pluralité de sources lumineuses (10) qui sont adaptées pour émettre des rayons lumineux dans une direction de rayonnement principale,
    - une optique primaire (100) avec plusieurs corps de guidage de lumière (110), lesquels corps de guidage de lumière (110) sont disposés dans la direction principale de rayonnement des sources lumineuses (10) et présentent chacun une surface d'entrée de lumière (120), dans laquelle les rayons lumineux des sources lumineuses peuvent être injectés, ainsi qu'une surface de sortie de lumière commune (130), les corps de guidage de lumière (110) débouchant dans la surface de sortie de lumière commune (130), et
    - un support (200) qui est conçu pour maintenir les surfaces d'entrée de lumière (120) des corps de guidage de lumière (110) en position par rapport aux sources de lumière (10), dans lequel
    le support (200) présente au moins un élément d'encliquetage (210) pour la fixation de l'optique primaire (100), l'élément d'encliquetage (210) étant conçu pour s'engager dans un contre-élément d'encliquetage (140) associé à l'élément d'encliquetage (210) et prévu sur l'optique primaire (100), caractérisé en ce que le support (200) présente au moins une paroi de positionnement (240) qui fait saillie dans la direction principale de rayonnement et qui est conçue pour s'engager dans un renfoncement prévu sur l'optique primaire (110),
    où
    sur la au moins une paroi de positionnement (240) est disposée au moins une saillie (241) qui s'étend longitudinalement dans la direction du rayonnement principal et qui est conçue pour s'engager par complémentarité de forme dans une rainure de guidage dans l'optique primaire (100) associée à la au moins une saillie (241).
  2. Dispositif d'éclairage selon la revendication 1, caractérisé en ce que l'au moins un élément d'encliquetage (210) présente un ergot d'encliquetage (220) ou est conçu comme une contre-dépouille.
  3. Dispositif d'éclairage selon la revendication 1 ou 2, caractérisé en ce que le contre-élément d'encliquetage (140) est un ergot d'encliquetage ou est conçu comme une contre-dépouille (140).
  4. Dispositif d'éclairage selon l'une des revendications 1 à 4, caractérisé en ce que ledit au moins un élément d'encliquetage (210) est réalisé d'un seul tenant avec le support (200).
  5. Dispositif d'éclairage selon l'une des revendications 1 à 4, caractérisé en ce que l'optique primaire (100) est réalisée d'une seule pièce en une matière plastique transparente, conductrice de la lumière et moulable.
  6. Dispositif d'éclairage selon l'une des revendications 1 à 5, caractérisé en ce que l'optique primaire (100) est réalisée en un matériau silicone, de préférence en un poly(organo)siloxane.
  7. Dispositif d'éclairage selon l'une des revendications 1 à 6, caractérisé en ce que le support (200) présente une portion de réception (230) avec au moins une ouverture (231) dans laquelle les corps de guidage de lumière (110) peuvent être reçus et positionnés, le support (200) présentant de préférence des ouvertures (231) correspondant au nombre de corps de guidage de lumière (110), chacune étant associée à un corps de guidage de lumière (110).
  8. Dispositif d'éclairage selon la revendication 7, caractérisé en ce que, dans la direction principale de rayonnement, au moins une paroi de positionnement (240) est respectivement disposée latéralement à la section de réception (230) du support (200).
  9. Dispositif d'éclairage selon l'une quelconque des revendications 1 à 8, caractérisé en ce que les corps de guidage de lumière (110) sont de forme allongée, avec une extension plus importante dans la direction principale de rayonnement des rayons lumineux que transversalement à celle-ci.
  10. Dispositif d'éclairage selon l'une quelconque des revendications 1 à 9, caractérisé en ce que les corps de guidage de lumière (110) présentent une section transversale qui se rétrécit en direction de leurs surfaces d'entrée de lumière (120).
  11. Dispositif d'éclairage selon l'une des revendications 1 à 10, caractérisé en ce que les sources lumineuses (10) comprennent chacune une ou plusieurs diodes électroluminescentes.
  12. Module d'éclairage comprenant au moins un dispositif d'éclairage selon l'une des revendications 1 à 11.
  13. Projecteur de véhicule automobile comportant au moins un dispositif d'éclairage selon l'une des revendications 1 à 11 ou au moins un module d'éclairage selon la revendication 12.
EP19723421.4A 2018-06-04 2019-05-14 Dispositif d'éclairage pour un phare de véhicule automobile Active EP3803195B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18175740.2A EP3578874A1 (fr) 2018-06-04 2018-06-04 Dispositif d'éclairage pour un phare de véhicule automobile
PCT/EP2019/062307 WO2019233713A1 (fr) 2018-06-04 2019-05-14 Dispositif d'éclairage pour projecteur de véhicule automobile

Publications (2)

Publication Number Publication Date
EP3803195A1 EP3803195A1 (fr) 2021-04-14
EP3803195B1 true EP3803195B1 (fr) 2023-07-19

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ID=62528325

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Application Number Title Priority Date Filing Date
EP18175740.2A Withdrawn EP3578874A1 (fr) 2018-06-04 2018-06-04 Dispositif d'éclairage pour un phare de véhicule automobile
EP19723421.4A Active EP3803195B1 (fr) 2018-06-04 2019-05-14 Dispositif d'éclairage pour un phare de véhicule automobile

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Application Number Title Priority Date Filing Date
EP18175740.2A Withdrawn EP3578874A1 (fr) 2018-06-04 2018-06-04 Dispositif d'éclairage pour un phare de véhicule automobile

Country Status (6)

Country Link
US (1) US11415289B2 (fr)
EP (2) EP3578874A1 (fr)
JP (1) JP7146956B2 (fr)
KR (1) KR102481253B1 (fr)
CN (1) CN112166283B (fr)
WO (1) WO2019233713A1 (fr)

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KR102607316B1 (ko) * 2021-03-31 2023-11-29 에스엘 주식회사 차량용 램프
EP4303482A1 (fr) * 2022-07-07 2024-01-10 ZKW Group GmbH Dispositif d'éclairage pour phare de véhicule automobile pourvu d'unités d'éclairage adjacentes

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CN108397743A (zh) * 2018-04-13 2018-08-14 华域视觉科技(上海)有限公司 光学模组及车灯

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WO2019233713A1 (fr) 2019-12-12
JP7146956B2 (ja) 2022-10-04
CN112166283B (zh) 2023-08-04
CN112166283A (zh) 2021-01-01
EP3578874A1 (fr) 2019-12-11
EP3803195A1 (fr) 2021-04-14
US20210231283A1 (en) 2021-07-29
JP2021525447A (ja) 2021-09-24
US11415289B2 (en) 2022-08-16
KR102481253B1 (ko) 2022-12-27
KR20210006953A (ko) 2021-01-19

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