EP3351849B1 - Module à led et dispositif d'éclairage pour un véhicule automobile pourvu d'une pluralité de tels modules à led - Google Patents

Module à led et dispositif d'éclairage pour un véhicule automobile pourvu d'une pluralité de tels modules à led Download PDF

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Publication number
EP3351849B1
EP3351849B1 EP17204713.6A EP17204713A EP3351849B1 EP 3351849 B1 EP3351849 B1 EP 3351849B1 EP 17204713 A EP17204713 A EP 17204713A EP 3351849 B1 EP3351849 B1 EP 3351849B1
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EP
European Patent Office
Prior art keywords
light
focal point
reflector element
reflector
light module
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.)
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Application number
EP17204713.6A
Other languages
German (de)
English (en)
Other versions
EP3351849A1 (fr
Inventor
Ben Huber
Wolfgang Hossfeld
Ernst-Olaf Rosenhahn
Patrick Ziegler
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.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Marelli Automotive Lighting Reutlingen Germany GmbH
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Publication of EP3351849A1 publication Critical patent/EP3351849A1/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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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]
    • 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
    • F21S41/25—Projection 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
    • F21S41/30—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
    • F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/26—Elongated 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment thereof
    • 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
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a light module of a lighting device of a motor vehicle according to claim 1.
  • the lighting device is preferably designed as a headlight for a motor vehicle.
  • the light module is therefore used to generate a headlight function (e.g. low beam, high beam, fog light, dynamic cornering light, adaptive light distribution such as city light, country road light or motorway light) or part of it.
  • a headlight function e.g. low beam, high beam, fog light, dynamic cornering light, adaptive light distribution such as city light, country road light or motorway light
  • EP 1 935 715 A1 reveals a light module.
  • the light module includes an elliptical reflector, a semiconductor light source, a projection lens, and a flat reflection surface disposed between the projection lens and the lens focal point.
  • Another lighting device is from the DE 10 2005 058 936 A1 known.
  • a lighting device is known in which a first and a second optical element of the light module are both designed as reflector elements.
  • the light module In the beam path between the first and second reflector elements, the light module has a diaphragm arrangement which shades part of the light reflected by the first reflector element and prevents it from hitting the second reflector element, so that the light module has a dimmed light distribution with a substantially horizontal Chiaroscuro border created.
  • the light distribution is, for example, a fog light or a low beam with a straight or asymmetrical light-dark border.
  • a light source of the light module is arranged in a first focal point of the first reflector element.
  • a first focal point of the second reflector element is congruent with a second focal point of the first reflector element.
  • One edge of the aperture arrangement is arranged in the first focal point of the second reflector element. The edge of the aperture arrangement is used to form the light-dark boundary of the dimmed light distribution.
  • the first reflector element has an elliptical shape in a vertical section and/or in a horizontal section.
  • the second reflector element is formed by conical segments, or points or sections of the second reflector element can be formed as a free-form reflector whose reflecting surface can be described mathematically.
  • the known light module does not have a lens element, so that the variability of the light module with regard to the achievable magnification factors by which an image of the light source can be enlarged to realize the light distribution is limited to the magnification factors that can be achieved by using the two reflector elements.
  • a lighting device with a single light module which in a first exemplary embodiment has a reflector element as the first optical element and a lens element as the second optical element.
  • the lens element is used to 'correct' the light distribution, for example in the horizontal direction.
  • the lens element manipulates the light rays without attempting to maintain imaging functionality.
  • a second embodiment is similar to that from EP 0 126 281 A1 well-known light module.
  • the known light module includes an elliptical first reflector element, a diaphragm arrangement and a parabolic second reflector element.
  • EP 0 126 281 A1 is a surface extent of the aperture arrangement along (and not perpendicular to) an optical axis of the first Reflector element aligned and forms a reflective surface, so that a dimmed light distribution with a light-dark boundary is formed by reflecting the corresponding light rays in the direction of the second reflector element instead of simply shading them.
  • the present invention is based on the object of designing and developing a light module of the type mentioned in such a way that it forms an imaging system with a large number of degrees of freedom, through which a broad, homogeneous light distribution on the road in front of the Motor vehicle can be produced.
  • the light module has a third optical element arranged in the beam path, the first optical element comprising a first reflector element which reflects at least part of the light rays emitted by the light source, the second optical element which The first reflector element is arranged downstream in the beam path, comprises a second reflector element and the third optical element, which is arranged downstream of the second reflector element in the beam path, comprises a projection lens, which, in cooperation with the second reflector element, the light beams previously deflected on the two reflector elements to realize the predetermined light distribution projected onto the road in front of the motor vehicle.
  • the two reflector elements have collecting or concentrating light properties.
  • the light module according to the invention thus comprises two reflector elements and a lens element implemented as a projection lens in order to be able to implement a legally specified headlight function.
  • the system has approximately imaging properties with respect to a position on the semiconductor light source with a high luminance. This ensures a sufficiently large maximum illuminance to provide a long range along the road.
  • the large number of optical elements in the light module enables a large number of degrees of freedom, which allow the formation of a broad, homogeneous light distribution pattern on the road in front of the motor vehicle.
  • the light module can be designed to be relatively small.
  • the light exit surface from the light module which generally corresponds to the surface of the lens element, can be made small at least in one plane. With a small design of the light exit surface in a vertical plane, the light module can be designed to be narrow and efficient with vertical dimensions of the lens element of less than 30 mm.
  • the light module has a diaphragm element on, which is arranged in the beam path between the first reflector element and the second reflector element.
  • the diaphragm element can have a surface extent that runs essentially perpendicular to a main reflection direction of the first reflector element.
  • the diaphragm element can also have a surface extension which runs essentially parallel to a main reflection direction of the first reflector element, with at least those surfaces of the diaphragm element which are acted upon by light rays which are shaded by the diaphragm element being designed to be reflective.
  • the imaging properties of the light module remain with respect to a position on the semiconductor light source that has a high luminance and - if present - with respect to an edge of the aperture element. This leads to a particularly efficient generation of the maximum illuminance near a horizontal light-dark limit, while at the same time Range along the road is increased.
  • the interaction of the different focal lengths used in the light module allows adjustment and optimization of the scattering of the light on the various optical elements, so that efficient light transmission can be combined with a relatively small light exit area.
  • the optical magnification factors of the first reflector element would be the same in the vertical and horizontal sections.
  • the optical magnification factors of the first reflector element are different in the vertical and horizontal sections if the focal points or focal point clouds of the two sections do not overlap.
  • the light source is at a first focal point or in the vicinity of a first focal point cloud of the first reflector element arranged.
  • the light rays emitted by the almost point-shaped semiconductor light source are then bundled in the second focal point or in the vicinity of the second focal point cloud of the first reflector element.
  • the second reflector element preferably has a focal point or a focal point cloud in a vertical section and in a horizontal section. Focal points or focal point clouds of the two sections can overlap or be arranged differently in space.
  • the second reflector element can have a parabolic shape at least in a section, preferably in a vertical section.
  • the second reflector element can have a longitudinal extension essentially transverse to an optical axis of the first reflector element, preferably in the horizontal direction.
  • the longitudinal extension can be straight or curved or curved around the second focal point or the second focal point cloud of the first reflector element.
  • the second reflector element it would also be conceivable for the second reflector element to have a free form.
  • a focal point or a focal point cloud comprising a plurality of closely spaced focal points of the second reflector element is arranged in a second focal point or in the vicinity of a second focal point cloud of the first reflector element or that a focal point line comprising a plurality of focal points arranged next to one another of the second reflector element runs through a second focal point or a second focal point cloud of the first reflector element.
  • the second reflector element and the Lens element together form a projection unit and are shaped dependently of one another and arranged relative to one another in such a way that, in cooperation, they project an edge of the aperture element as a light-dark boundary of the dimmed light distribution onto the road in front of the motor vehicle.
  • the edge of the aperture element which is projected by the projection unit of the light module as a light-dark boundary of the light distribution onto the road in front of the motor vehicle, advantageously runs through a second focal point or in the vicinity of a second focal point cloud of the first reflector element.
  • the design of the second reflector element and the lens element are coordinated with one another in such a way that, for example, depending on whether the second reflector element has a second focal point, a second focal point cloud or a second focal point line, the lens element correspondingly has a first focal point, a first focal point cloud or a first focal point line having.
  • a second reflector element for example elongated in the horizontal direction, has a focal line with a plurality of second focal points of the different vertical sections of the reflector element arranged next to one another. In a vertical section, the second reflector element can have a parabolic shape or a free shape deviating from it.
  • a light module 5 is arranged inside the housing 2.
  • the light module 5 can be arranged in the housing 2 in a fixed manner or pivotably about a horizontal axis and/or a vertical axis.
  • the light module 5 emits light in a main exit direction 6, which preferably runs parallel to a direction of travel 7 of the motor vehicle.
  • the main exit direction 6 of the light module 5 can also run at least at times slightly inclined with respect to the direction of travel 7, for example when varying the headlight range (up or down) or when implementing a cornering light functionality (to the right or left).
  • the light module 5 is used to generate a headlight function (e.g. low beam, high beam, fog light, dynamic cornering light, adaptive light distribution such as city light, country road light or motorway light, etc.).
  • a headlight function e.g. low beam, high beam, fog light, dynamic cornering light, adaptive light distribution such as city light, country road light or motorway light, etc.
  • the light module 5 includes a semiconductor light source 10 for emitting light.
  • the light source 10 includes, for example, one or more light-emitting diodes (LED).
  • Each light-emitting diode can have one or more semiconductor chips, each with a light-emitting surface.
  • the light module 5 comprises at least two optical elements 11, 12 arranged one after the other in the beam path of the emitted light for redirecting the light rays emitted by the light source 10 with the aim of generating a predetermined light distribution on a road in front of the motor vehicle.
  • the light module 5 comprises a third optical element 13 arranged in the beam path.
  • the third optical element 13, which is arranged downstream of the second reflector element 12 in the beam path, comprises a lens element which projects the light beams 16 previously deflected on the two reflector elements 11, 12 onto a roadway in front of the motor vehicle in order to realize the predetermined light distribution in the main exit direction 6.
  • the vertical magnification is greater than the horizontal magnification
  • the horizontal magnification is greater than the vertical magnification.
  • the image 21 has been scaled by a factor of 1/10 after the lens element 13 for the purpose of better representation.
  • a Patoscuro border with a predetermined shape for example an asymmetrical Cadinum-containing apexuminum-containing apexuminum-containing apexuminum-containing apexuminum-containing apexuminum-containing apexuminum-containing apexuminum-containing apexuminum-containing apexuminum-containing apexuminsky a asymmetrical Volta prefix (PAN) pre-linked to the first horizontal section, which lies above the first section, and an oblique section approximately between the two traffic sides, which Connecting the two horizontal sections together can be created with the help of a correspondingly shaped edge 18 of the aperture arrangement 17.
  • the adjustment of the focal lengths on the second reflector element 12 can be used to influence the angle of expansion (scattering) of the light rays 16 and accordingly the illuminated area on the light entry surface of the lens element 13. Even a converging course of the light rays 16 between the second reflector element 12 and the lens element 13 would be conceivable. These additional degrees of freedom are available for shaping the beam path of the light beams 16, which is advantageous for the design and development of narrow, slim and efficient light modules 5 and lighting devices 1 with small vertical dimensions of the light exit surface (of the lens element 13), preferably less than 30 mm, is.
  • the ratio of the selected focal lengths of the second reflector element 12 determines the horizontal and vertical magnification factors M12h, M12v of the second reflector element 12.
  • the imaging task is performed by the second reflector element 12 in cooperation with the lens element 13, with the edge 18 of the aperture element 17 being projected into a position far in front of the motor vehicle, which approximately corresponds to a point-to-point projection. Therefore, the shape of the lens element is mathematically directly related to the shape of the second reflector element 12 or its reflection surface and varies depending on the degree of light divergence or convergence.
  • the lens element 13 uses a first focus (eg focal point, focal point cloud or focal point line, straight or curved) which is the same is designed like the second focus (eg focal point, focal point cloud or focal point line, straight or curved) of the second reflector element 12.
  • the second focus of the lens element 13, which is usually designed as a focal point is arranged far in front of the vehicle.
  • the corresponding ratio of the focal lengths leads to the horizontal and vertical magnification factors M13h, M13v of the lens element 13.
  • the aperture element 17 can essentially be implemented in two ways. On the one hand, it can be implemented as a pure aperture element, which 'only' shades incident light rays that would leave the lens element 13 in directions above the desired horizontal light-dark limit of the resulting light distribution, so that these light rays do not contribute to generating the light distribution. With the help of a slight offset of the light source 10 from the first focal point of the first reflector element 11, which ensures that the majority of the light rays 15 bundled by the first reflector element 11 can pass through the light module 5 and participate in generating the light distribution (and not from it Aperture element 17 can be shaded), the efficiency of the light module 5 can be significantly improved. A component of the main radiation direction of the light source 10 is directed counter to the direction of travel of the motor vehicle.
  • the panel element 17 can have at least partially mirrored surfaces.
  • the mirrored surface is preferably aligned with the optical axis of the first reflector element 11 and is formed at a corresponding location on the aperture element 17.
  • Such a light module 5 is, for example, in the Figures 4 and 5 shown.
  • the aperture element 17 has a Surface extension which runs essentially parallel to a main reflection direction or to an optical axis of the first reflector element 11.
  • at least those surfaces of the diaphragm element 17 that are acted upon by light beams 15 are designed to be reflective. In this way, the light rays 15 shaded by the diaphragm element 17 are not lost, but can be reflected into the resulting dimmed light distribution, preferably just below the light-dark limit.
  • An edge 18 of the aperture element 17, in the case shown here a front edge 18 of the aperture element 17, is projected onto the road in front of the motor vehicle by the imaging unit 12, 13 (so-called projection unit) of the light module 5 as a light-dark boundary of the dimmed light distribution.
  • a component of the main radiation direction of the light source 10 is directed in the direction of travel of the motor vehicle.
  • the shape and orientation of the aperture element 17 is then used to form the horizontal light-dark boundary of the light distribution. Due to the reflective properties of the aperture element 17, the second reflector element 12 must be able to handle an intermediate light distribution that is compared to the intermediate light distribution in the light module 5 Figures 1 and 2 is oriented the other way around. This explains the opposite orientation and arrangement of the first reflector element 11 in the two different light modules 5.
  • the diaphragm element 17 can also be designed to be movable in order to enable a mechanical switching of the resulting light distribution between the dimmed light distribution and a high beam distribution.
  • the individual light distributions of the individual sub-modules 5.1, 5.2 and/or 5.3 can be coordinated and adjusted by slightly moving the modules, for example by vertically adjusting a horizontal light-dark limit of the resulting overall light distribution or by horizontally adjusting light distribution focal points in order to meet the legal requirements for the resulting overall light distribution to be met.
  • the modules are preferably moved by moving (perpendicular to the direction of travel of the motor vehicle) the second focal point (at "infinity") of the system (second reflector element 12 and lens element 13) and can be individually adapted for each of the sub-modules 5.1, 5.2, 5.3.
  • a light module 5 can be rotated or tilted about an optical axis (parallel to the light exit direction 6), or the light source 10 is arranged outside the focal point of the first reflector element 11.
  • the light source 10 can be moved laterally perpendicular to the drawing plane. In this way, light distribution can also be shifted. This means that, for example, a basic light can be moved to the outside of the vehicle and the overall light distribution can be broadened.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Geometry (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (14)

  1. Module de lumière (5; 5.1, 5.2, 5.3) d'un dispositif d'éclairage (1) d'un véhicule automobile, le module de lumière (5; 5.1, 5.2, 5.3) comprenant une source de lumière à semi-conducteur (10) pour émettre de la lumière et au moins deux éléments optiques disposés l'un après l'autre dans le trajet du faisceau de la lumière émise et destinés à dévier les faisceaux lumineux émis par la source de lumière (10) dans le but de générer une répartition de lumière prédéterminée sur une chaussée devant le véhicule automobile, dans lequel le module de lumière (5; 5.1, 5.2, 5.3) comprend un troisième élément optique disposé dans le trajet du faisceau, dans lequel le premier élément optique comprend un premier élément réflecteur (11) qui réfléchit au moins une partie des rayons lumineux (14) émis par la source de lumière (10), le deuxième élément optique qui est disposé en aval du premier élément réflecteur (11) dans le trajet du faisceau, comprend un deuxième élément réflecteur (12) et le troisième élément optique qui est disposé en aval du deuxième élément réflecteur (12) dans le trajet du faisceau, comprend une lentille de projection comme un élément de lentille (13), qui, en coopération avec le deuxième élément réflecteur (12), projette les faisceaux lumineux préalablement dévié sur les deux éléments réflecteurs (11, 12), sur la chaussée devant le véhicule automobile pour réaliser la répartition de lumière prédéterminée, dans lequel le premier élément réflecteur (11) présente des propriétés collectrices et dans lequel le module de lumière (5; 5.1, 5.2, 5.3) comprend un élément de diaphragme (17) qui est disposé dans le trajet du faisceau entre le premier élément réflecteur (11) et le deuxième élément réflecteur (12), dans lequel le deuxième élément réflecteur (12) et la lentille de projection comme l'élément de lentille (13) forment ensemble une unité de projection et sont formés de manière indépendante l'un de l'autre et disposés l'un par rapport à l'autre de telle sorte qu'ils projettent en coopération un bord (18) de l'élément de diaphragme (17) en tant que limite claire-obscure de la répartition de lumière sur la chaussée devant le véhicule automobile, caractérisé par le fait que le deuxième élément réflecteur (12) présente des propriétés collectrices et qu'un foyer ou un nuage de foyers comprenant plusieurs foyers proches les uns des autres du deuxième élément réflecteur (12) est disposé dans un deuxième foyer ou à proximité d'un deuxième nuage de foyers du premier élément réflecteur (11) ou qu'une ligne de foyers comprenant plusieurs foyers disposés les uns à côte des autres du deuxième élément réflecteur (12) passe à travers un deuxième foyer ou un deuxième nuage de foyers du premier élément réflecteur (11) .
  2. Module de lumière (5; 5.1, 5.2, 5.3) selon la revendication 1, caractérisé par le fait que l'élément de diaphragme (17) présente une extension de surface qui s'étend pour l'essentiel perpendiculairement à une direction de réflexion principale du premier élément réflecteur (11).
  3. Module de lumière (5; 5.1, 5.2, 5.3) selon la revendication 1, caractérisé par le fait que l'élément de diaphragme (17) présente une extension de surface qui s'étend pour l'essentiel parallèlement à une direction de réflexion principale du premier élément réflecteur (11), dans lequel au moins les surfaces de l'élément de diaphragme (17) qui sont soumises à des rayons lumineux (15) lesquels sont ombragés par l'élément de diaphragme (17) sont conçues de manière être réfléchissantes.
  4. Module de lumière (5; 5.1, 5.2, 5.3) selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que le premier élément réflecteur (11) présente une forme elliptique en une coupe verticale et en une coupe horizontale.
  5. Module de lumière (5; 5.1, 5.2, 5.3) selon la revendication 4, caractérisé par le fait que le premier élément réflecteur (11) présente en coupe verticale et en coupe horizontale respectivement deux foyers ou nuages de foyers comprenant plusieurs foyers qui sont proches les uns des autres.
  6. Module de lumière (5; 5.1, 5.2, 5.3) selon la revendication 5, caractérisé par le fait que les foyers ou bien nuages de foyers des deux coupes se chevauchent.
  7. Module de lumière (5; 5.1, 5.2, 5.3) selon l'une quelconque des revendications 1 à 6, caractérisé par le fait que la source de lumière (10) est disposée dans un premier foyer ou au voisinage d'un premier nuage de foyers du premier élément réflecteur (11).
  8. Module de lumière (5; 5.1, 5.2, 5.3) selon la revendication 1, caractérisé par le fait que, en position installée dans le véhicule automobile, un grossissement vertical est supérieur à un grossissement horizontal dans le deuxième élément réflecteur (12) et un grossissement horizontal est supérieur à un grossissement vertical dans l'élément de lentille (13).
  9. Module de lumière (5; 5.1, 5.2, 5.3) selon l'une quelconque des revendications 1 à 7, caractérisé par le fait qu'un bord (18) de l'élément de diaphragme (17) s'étend à travers un deuxième foyer ou au voisinage d'un deuxième nuage de foyers du premier élément réflecteur (11).
  10. Module de lumière (5; 5.1, 5.2, 5.3) selon l'une quelconque des revendications 1 à 7, caractérisé par le fait que, en fonction du fait si le deuxième élément réflecteur (12) présente un deuxième foyer, un deuxième nuage de foyers ou une deuxième ligne de foyers, l'élément de lentille (13) présente de manière correspondante un premier foyer, un premier nuage de foyers ou une première ligne de foyers.
  11. Module de lumière (5; 5.1, 5.2, 5.3) selon la revendication 9, caractérisé par le fait que l'élément de lentille (13) présente un deuxième foyer ou un deuxième nuage de foyers qui est disposé à grande distance du module de lumière (5; 5.1, 5.2, 5.3) devant le véhicule automobile.
  12. Dispositif d'éclairage (1) d'un véhicule automobile pour générer une répartition de lumière prédéterminée sur une chaussée devant le véhicule automobile, caractérisé par le fait que le dispositif d'éclairage (1) comprend plusieurs modules de lumière (5; 5.1, 5.2, 5.3) selon l'une quelconque des revendications 1 à 10, qui sont disposés les uns à côtés des autres en état installé dans le véhicule automobile, dans lequel les répartitions de lumière des modules de lumière (5; 5.1, 5.2, 5.3) individuels se superposent à la répartition de lumière prédéterminée du dispositif d'éclairage (1).
  13. Dispositif d'éclairage (1) selon la revendication 12, caractérisé par le fait qu'au moins deux des modules de lumière (5; 5.1, 5.2, 5.3) du dispositif d'éclairage (1) génèrent des répartitions de lumière différentes.
  14. Dispositif d'éclairage (1) selon la revendication 12 ou 13, caractérisé par le fait que les premiers éléments réflecteurs (11), les deuxièmes éléments réflecteurs (12) et/ou les éléments de lentille (13) des modules de lumière (5; 5.1, 5.2, 5.3) du dispositif d'éclairage (1) sont respectivement conçus comme une première unité d'élément réflecteur, une deuxième unité d'élément réflecteur ou une unité d'élément de lentille intégrales communes.
EP17204713.6A 2016-12-23 2017-11-30 Module à led et dispositif d'éclairage pour un véhicule automobile pourvu d'une pluralité de tels modules à led Active EP3351849B1 (fr)

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US20180180241A1 (en) 2018-06-28
CN108240603B (zh) 2022-12-13
EP3351849A1 (fr) 2018-07-25
CN108240603A (zh) 2018-07-03
DE102016125676A1 (de) 2018-06-28

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