EP3853517B1 - Beleuchtungssystem für scheinwerfer und/oder signalleuchte eines kraftfahrzeuges - Google Patents

Beleuchtungssystem für scheinwerfer und/oder signalleuchte eines kraftfahrzeuges Download PDF

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Publication number
EP3853517B1
EP3853517B1 EP19766291.9A EP19766291A EP3853517B1 EP 3853517 B1 EP3853517 B1 EP 3853517B1 EP 19766291 A EP19766291 A EP 19766291A EP 3853517 B1 EP3853517 B1 EP 3853517B1
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EP
European Patent Office
Prior art keywords
optical element
light
optical
frame
source
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Active
Application number
EP19766291.9A
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English (en)
French (fr)
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EP3853517A1 (de
Inventor
Pierre Renaud
Benoit Delande
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Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP3853517A1 publication Critical patent/EP3853517A1/de
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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]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • 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
    • 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
    • F21S41/60—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
    • 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 the field of lighting and/or signaling, in particular for motor vehicles. More particularly, the invention relates to a light module for a lighting and/or signaling device for a motor vehicle
  • Motor vehicles are equipped with headlights to illuminate the road in front of the vehicle so that the driver can see the road when the outside light is reduced, particularly at night.
  • a projector comprises a housing and a transparent glass for closing the housing.
  • a light module comprising a light source and an optical element is arranged in the housing. The light source emits light rays towards an entrance face of the optical element which shapes said light rays.
  • the optical module makes it possible to form, from the light rays emitted by the light source, a final light beam with a precise light distribution which is projected onto the road through the closing glass of the headlight.
  • the light source is correctly positioned relative to the entry face of the optical element so that the light rays emitted by the light source are directed towards the entry face of the optical element. optical element.
  • the entrance face must intercept a maximum of the light rays emitted by the light source. To do this, the light source must be positioned as close as possible to the entry face of the optical element, for example at a distance less than 0.4 mm.
  • the light sources are not damaged, it is important that there remains a space between the entry face of the the optical element and the light source. Indeed, if the entry face of the optical element came to touch the light source, the optical element and the light source would be damaged.
  • the documents FR 3 056 700 A1 , CN 107 525 005 A And US 2008/253144 A1 show such projectors.
  • the light source when the light source is turned on, it produces heat. Due to the proximity of the light source and the optical element, the heat produced by the light source heats the optical element. This then deforms, which modifies the distance between the light source and the entrance face of the optical element. The relative position of the light source and the entrance face of the optical element is thus modified. The light rays emitted by the light source then enter differently through the entrance face of the optical element, which leads to a modification of the final light beam.
  • the document EP2306077 describes light modules comprising a light source positioned on a base structure via a printed circuit and an optical element held via a support to the base structure, the support and the optical element being in the same material.
  • the light source when activated, it heats both the optical element and its support.
  • the deformation of the optical element is then compensated by the deformation of the support.
  • An aim of the invention is to provide an alternative solution of a light module making it possible to guarantee the position of the optical element relative to the light source and to guarantee positioning of the light source as close as possible to the face input of the optical element without coming into contact with the latter.
  • Another aim of the invention is to maintain a substantially constant distance between the light source and the entrance face of the optical element, independently of temperature variations.
  • a light module for a motor vehicle lighting and/or signaling device according to claim 1 is provided.
  • Direct contact means that the pad touches the source support. There is therefore no intermediate part between the pad and the source support.
  • the optical element is then referenced directly relative to the source support using said at least one pad.
  • indirect contact we mean that the pad comes into contact with an intermediate part which is in contact with the source support.
  • the optical element is then referenced relative to the source support by means of an intermediate part.
  • the light source can be positioned relative to the optical element.
  • the pad whether in direct or indirect contact with the source support, makes it possible to reference the optical element in relation to the source support and therefore in relation to the light source which is also positioned on the support. from source.
  • the pad makes it possible to control the distance between the optical part and the light source.
  • the light source can therefore be positioned as close as possible to the entry face of the optical element without coming into contact with the latter.
  • the invention also makes it possible to maintain a substantially constant distance between the light source and the entrance face of the optical element, independently of temperature variations. Indeed, as the optical element and the pad are made of the same material, they deform in the same way depending on temperature variations. As the plot serves as referencing, its deformation compensates for the deformation of the optical element, which ensures a constant distance between the entry face of the optical element and the light source.
  • the distance between the at least one light source and the entry face of the optical element is less than 0.4 mm, which allows the entry face to intercept the majority of the light rays. emitted by the light source.
  • the optical element comprises a plurality of pads, for example 2 pads, 3 pads or 4 pads.
  • the at least one pad is placed at the periphery of the input face of the optical element.
  • a single stud can be positioned all along the periphery.
  • several pads can be distributed along the periphery. They can be spaced regularly, that is to say the spaces between two successive pads are identical, or they can be spaced irregularly. They can also be distributed symmetrically on either side of an axis of symmetry of the input face of the optical element.
  • the optical element comprises a plurality of microlenses.
  • the optical element comprises a plurality of optical guides each comprising an entry face forming said entry face of the optical element.
  • the optical guides come from the optical element in the same direction as the pads.
  • the entry faces of the optical guides are thus arranged facing the source support.
  • the optical element comprises at least as many optical guides as light sources.
  • the number of light sources may be less than the number of optical guides. Certain optical guides are then not associated with any light source. Alternatively, the number of light sources can be equal to the number of optical guides, each optical guide is then associated with a light source.
  • Each of the light sources is associated with an optical guide.
  • the light source with which the optical guide is associated is arranged facing the entry face of the optical guide, so that light rays emitted by each of the light sources enter the optical element via the entry face of the optical guide with which it is associated.
  • the frame comprises a base by which it is in contact with said source support, and the orthogonal projection of the free end of at least one of the pads on a straight line perpendicular to the plane tangent to said base is located further upstream or at the same level in the direction of the base as the projection of the entry face of the optical guide which is located furthest downstream in this same direction among all the projections input faces of the optical guides.
  • the ends of the optical guides extend further in the direction of the base than the studs projected on a straight line perpendicular to the plane tangent to the base of the frame.
  • a spacer is in contact with the pad so as to guarantee a space between the entry face of the optical guides and the light sources.
  • the orthogonal projection of the element formed by the spacer and the pad with which it is associated on a straight line perpendicular to the plane tangent to the base is then located further downstream in the direction of the base than the projection of the entry face of the optical guide which is located furthest downstream in this same direction among all the projections of the entry faces of the optical guides.
  • the spacer is positioned on the source support, the pad bearing on the spacer.
  • the spacer is attached to the end of the stud.
  • the frame comprises a base by which it is in contact with said source support, and the orthogonal projection of the free end of at least one of the pads on a straight line perpendicular to the plane tangent to said base is located further downstream in the direction of the base than the projection of the entry face of the optical guide which is located furthest downstream in this same direction among all the projections of the entry faces optical guides.
  • the ends of the optical guides extend less far in the direction of the base than the studs, projecting on a straight line perpendicular to the plane tangent to the base of the frame.
  • the pads then make it possible to reference the optical element on the source support during assembly and make it possible to control the space between the entry face of the optical element and the light sources. They guarantee the maintenance of a space between the entrance face of the optical element and the light sources.
  • each pad before mounting the assembly formed by the optical element and the frame on the source support, each pad intersects the plane tangent to the base. Contact between the pads and the source support is thus ensured for temperatures ranging from -40°C to 25°C.
  • the light module includes an elastic junction between the optical element and the frame capable of deforming when mounting the assembly formed by the frame and the optical element on the source support.
  • the assembly formed by the optical element and the frame can thus be easily assembled on the source support.
  • the elastic junction is made of the same material as the optical element. This facilitates the manufacturing of the light module, a single material having to be injected to make the optical element and the elastic junction.
  • the optical element and the pads are made of an elastically deformable material.
  • the optical element and the pads can be made of silicone. This material has the advantage of offering good resistance to high temperatures, notably up to 150°C, commonly encountered in a environment of a motor vehicle lighting and/or signaling device.
  • the frame is made of a material that is less elastically deformable than the optical element and the pads. This makes it easier to handle and position the light guides in front of the light sources.
  • the frame is made of a material transparent to ultraviolet rays, in order to allow the frame to be fixed to the source support with an adhesive which crosslinks under the effect of ultraviolet radiation.
  • the frame can for example be made of polycarbonate (PC), polymethyl methacrylate (PMMA), polyurethane (PU) or polyetherimide (PEI).
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • PU polyurethane
  • PEI polyetherimide
  • the coefficient of expansion of the frame is much lower than the coefficient of expansion of the pads, which makes it possible to ensure contact between the pads and the source support in the event of a rise in temperature.
  • the pads come from the material of the optical element. They can thus be produced at the same time as the optical element. Alternatively, the pads are attached to the optical element. They are then produced separately then assembled with the optical element.
  • the optical element is molded onto the frame.
  • the source support is a printed circuit.
  • the light sources are light-emitting diodes also called LEDs for the English acronym “Light Emitting Diode”
  • the frame includes an interface for fixing the frame to the source support.
  • the framework may include one or more holes in which a screw can be positioned.
  • the fixing interface could also be formed by a shoulder of the frame or by a bonding groove on the frame.
  • FIG. 1 illustrates a light module 1 intended to equip a motor vehicle lighting or signaling device.
  • the light module 1 is capable of generating a forward light beam.
  • the light module comprises a source support 10 on which a plurality of light sources 14 are positioned.
  • the source support 10 shown here is formed by a printed circuit 10'.
  • the light sources 14, visible in particular at the Figure 3 are distributed in a lower row 12 and an upper row 13. Each row has thirteen light sources 14. The superposition of the two rows thus forms a matrix 15 of light sources 14.
  • the light sources are light-emitting diodes.
  • the matrix 15 of light sources 14 extends in a plane orthogonal to the longitudinal direction “L”.
  • the light sources 14 are carried by the front face of the source support 10.
  • the light sources 14 are likely to emit heat during their operation.
  • the source support 10 on which the light sources 14 are positioned is positioned on a heat sink 11.
  • the heat sink 11 comprising a plurality of fins 16 extending in the direction opposite to the source support 10 thus makes it possible to dissipate the heat emitted by light sources 14.
  • the light sources 14 emit light rays. These light rays must be shaped so that the optical module can project a light beam onto the road.
  • the optical module 1 has for this purpose an optical element 30 capable of receiving the light rays coming from the light sources 14.
  • the light sources 14 For the light rays to be correctly shaped, the light sources 14 must be positioned precisely relative to the optical element 30.
  • the position of the optical element relative to the source support is established via a frame 20.
  • the frame 20 makes it possible to hold the optical element 30.
  • the frame 20 is provided with a central hole around which the optical element 30 is overmolded.
  • the frame also has three orifices 21, 22, 23 in which a screw can be positioned so as to form a fixing interface between the frame 20 and the source support 10.
  • the frame 20 can then be fixed to the source support 30 by via screws not shown which are inserted into the orifices 21, 22, 23.
  • the fixing interface could also be formed by a shoulder of the frame 20 or by a bonding groove on the frame 20.
  • the frame 20 includes a base 200 through which it is in contact with the source support 10.
  • the optical element 30 comprises a front portion 30a visible at the figure 2 and a rear portion 30b visible at the Figure 4 .
  • the rear portion 30b is formed by a plurality of optical guides 33, 34.
  • the optical guides 33, 34 extend along a main longitudinal axis from an entry face 33a, 34a to a front end face 36a for exiting the light rays.
  • Each light guide is designed to guide the light rays entering through the entrance face 33a, 34a to the front end face 36a. All of the entry faces 33a, 34a of the optical guides 33, 34 thus form the entry face of the optical element 30 and each front end face 36a forms a secondary light source 36.
  • the rear portion 30b comprises at least as many optical guides 33, 34 as light sources 14.
  • the rear portion 30b comprises as many optical guides 33, 34 as the number of light sources 14 of the light module 1.
  • the rear portion 30b comprises a lower row 312 comprising thirteen optical guides 33 and an upper row 313 comprising thirteen optical guides 34.
  • Each optical guide 33 of the lower row 312 is associated with a light source 14 of the row lower 12 and each optical guide 34 of the upper row 313 is associated with a light source 14 of the upper row 13.
  • the light source 14 with which the optical guide 33, 34 is associated is arranged facing the input face 33a, 34a of the optical guide 33, 34.
  • the face input 33a, 34a of the associated optical guide 33, 34 then intercepts the light rays emitted by the light source 14 with which it is associated.
  • the optical element 30 could comprise a plurality of microlenses.
  • the entrance faces 33a, 34a of the light guides 33, 34 are arranged in a common plane which is parallel to the plane of the source support 10.
  • each face of entrance 33a, 34a of the optical guides 33, 34 is positioned opposite and close to an associated light source 14 so that the majority of the light rays emitted by each light source 14 enter the guide associated optics.
  • Each optical guide 33, 34 has a section adapted to produce an elementary light beam emerging from the desired shape to perform the function of the optical module equipping the lighting or signaling device.
  • the front end faces of the optical guides 33, 34 forming the secondary light sources 36 are arranged along a curved surface C.
  • the optical guides 33, 34 located towards the outside of the optical element 30 thus have a length greater than the optical guides 33, 34 located in the center of the optical element 30.
  • the front end faces of the optical guides 33, 34 could be arranged in a common plane.
  • the front end faces of the optical guides 33, 34 thus form a matrix of secondary light sources 36 which emit elementary light beams.
  • These elementary light beams are shaped by the front portion 30a of the optical element 30.
  • This front portion 30a makes it possible, for example, to spread the elementary light beams vertically and/or horizontally.
  • the front portion 30a has a common front end face 37 for exiting the light rays from the optical element 30.
  • the front portion 30a is integral with the optical guides 33, 34 so that the optical element 30 is a single-piece element.
  • the light module 1 also includes projection optics 41 arranged longitudinally at a distance in front of the optical element 30.
  • the projection optics is capable of projecting the secondary light sources formed by the optical guides towards infinity to form the final light beam.
  • the projection optics comprises an object focal surface S.
  • This focal surface has a concave spherical curvature defect. This defect is called Petzval field aberration.
  • each secondary light source must be located on the focal surface object of the projection optics 41.
  • a field correction optics 40 is interposed between the optical element 30 and the projection lens 41.
  • This field correction optics 40 is designed to correct part of the field curvature aberration of the projection optics 41, the other part of the field curvature aberration of the projection optics 41 being corrected thanks to the curvature formed by the sources of secondary lights 36.
  • the field correction optics 40 is shaped so that the image of the object focal surface S curved by the field correction optics 41 extends in an object focal plane in coincidence with the curved emission surface C of the matrix of secondary light sources 36.
  • the rear portion 30b of the optical element 30 comprises four pads 350 having a free end projecting towards the source support 10.
  • the other end of the pads 350 is integral with the optical element 30.
  • the pads are thus produced monobloc with optical element 30.
  • the pads 350 are distributed along the periphery of the input face of the optical element 30.
  • the pads 350 are positioned symmetrically on either side of a transverse axis passing through the middle of the face d entrance of the optical element 30 and on either side of a vertical axis passing through the middle of the entrance face of the optical element 30.
  • each of the pads 350 has the same length. In a variant, it would be possible to have pads of different lengths.
  • the distribution of the pads 350 at the periphery of the input face of the optical element 30 makes it possible to distribute the support points of the optical element 30 on the source support 10. In fact, during assembly, the pads 350 come into direct or indirect contact with the source support 10.
  • the pads 350 come into indirect contact with the source support 10.
  • the orthogonal projection of the free end of the pads 350 on a straight line D perpendicular to the tangent plane Ta at the base 200 is located further upstream or at the same level in the direction of the base 200 as the projection of the entrance face of the optical guide which is located furthest downstream in this same direction among all the projections of the entrance faces 33a, 34a of the optical guides 33, 34.
  • the pads 350 are then further away from the source support 10 than the input faces 33a, 34a of the optical guides 33, 34.
  • the pads 350 each come into contact with a spacer 351 which is in contact with the source support 10.
  • the optical element 30 is then referenced relative to the source support 10 via the spacers 351.
  • the orthogonal projection of the element formed by a spacer 351 and the pad 350 with which it is associated on a straight line D perpendicular to the tangent plane Ta at the base 200 is then located further downstream in the direction of the base 200 than the projection of the entrance face of the optical guide which is located furthest downstream in this same direction among all the projections of the entrance faces 33a, 34a of the optical guides 33, 34.
  • the spacers 351 thus guarantee the maintenance of a space E between the light sources 14 and the entry faces 33a, 34a of associated optical guides 33, 34, while making it possible to minimize this space E so that a maximum of light rays from the light sources 14 enter through the entrance face 33a, 34a of the associated optical guide 33, 34.
  • This gap can for example be chosen to be less than 0.4 mm.
  • the spacers 351 can be positioned on the source support 10, each pad 350 then bearing on a spacer 351. Alternatively, the spacers 351 can be attached to the end of the pads 350. The assembly formed by the pads 350 and the spacers 351 make it possible to position the optical element relative to the source support 10. Thus, the light source 14 can be positioned as close as possible to the entrance face of the optical element without coming into contact with the latter.
  • the pads 350 come into direct contact with the source support 10.
  • the orthogonal projection of the free end of the pads 350 on a straight line D perpendicular to the tangent plane Ta at the base 200 of the frame 20 is located further downstream in the direction of the base 200 than the projection of the entry face of the guide optical which is located furthest downstream in this same direction among all the projections of the input faces 33a, 34a of the optical guides 33, 34.
  • the pads 350 are then closer to the source support 10 than the input faces 33a, 34a of the optical guides 33, 34.
  • the pads 350 come into contact with the source support 10 and then allow a space to be maintained between the entry face 33a, 34a of the optical guides and the source support 10.
  • the distance between the source support 10 and the entry faces of the optical guides is therefore controlled by the length of the pads 350.
  • the length of the pads 350 is calculated so that this space is greater than the height of the light sources 14 considered in orthogonal projection on this same straight line D perpendicular to the tangent plane Ta at the base 200.
  • a space E is guaranteed between the light sources 14 which are positioned on the source support 10 and the input faces 33a, 34a of the associated optical guides 33, 34.
  • This space E is also such that a maximum of the light rays coming from the light sources 14 enter through the entrance face 33a, 34a of the associated optical guide 33, 34.
  • This gap can for example be chosen to be less than 0.4 mm.
  • each pad 350 intersects the tangent plane Ta at the base 200 of the frame 20, before mounting the assembly formed by the optical element 30 and the frame 20 on the support from source 10. This is particularly visible in the Figure 7 .
  • the light module 1 comprises an elastic junction 24 between the optical element 30 and the frame 20 capable of deforming when mounting the assembly formed by the frame 20 and the optical element 30 on the source support 10. This elastic junction 24 then makes it possible to position the element formed by the frame 20 and the optical element 30 on the source support 10 without deforming the optical element 30, and in particular without damaging the optical guides 33, 34.
  • pads 350 would have different lengths, it would be possible to combine the two embodiments so that certain pads 350 are in indirect contact with the source support, via a spacer and other pads 350 are in direct contact with the source support.
  • the pads 350 are made of the same material as the optical element 10.
  • the optical element 30 and the pads 350 deform in the same way depending on temperature variations.
  • the deformation of the optical element 30 is therefore compensated by the deformation of the pads 350.
  • a substantially constant distance can be maintained between the entry face of the optical element 30 and the light sources 14, independently of variations in temperatures.
  • the optical element 30 and the pads 350 are made of an elastically deformable material, for example silicone.
  • elastically deformable means that the material deforms without breaking when it is subjected to a constraint force. It is therefore flexible.
  • the elastic junction 24 is advantageously made of the same material as the optical element 30 and the pads 350.
  • the optical element 30, the pads 350 and the elastic junction 24 undergo the same deformation, which contributes to maintaining the distance between the light sources 14 and the input faces 33a, 34a of the optical guides 33, 34 substantially constant.
  • the frame 20 is made of a less elastically deformable material than the optical element and the pads, and thus makes it possible to ensure good fixing of the element formed by the frame 20 and the optical element 30 to the source support 10 and to facilitate the positioning of the optical guides 33, 34 opposite the light sources 14.
  • the coefficient of expansion of the frame 20 is much lower than the coefficient of expansion of the pads 350.

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

Claims (8)

  1. Leuchtmodul (1) für eine Beleuchtungs- und/oder Signalisierungsvorrichtung eines Kraftfahrzeugs, umfassend:
    mindestens eine Lichtquelle (14), die auf einem Quellenträger (10) angeordnet ist,
    ein optisches Element (30), das eine Eintrittsseite umfasst, die von der mindestens einen Lichtquelle (14) ausgesendete Lichtstrahlen empfängt und dieser gegenüber angeordnet ist,
    einen Rahmen (20), der das optische Element (30) trägt und an dem Quellenträger (10) befestigt ist,
    wobei das optische Element (30) mindestens ein Kontaktstück (350) aufweist, das ein zum Quellenträger (10) hin abstehendes freies Ende aufweist, wobei das mindestens eine Kontaktstück (350) aus dem gleichen Material wie das optische Element (30) ausgeführt ist und in direktem oder indirektem Kontakt mit dem Quellenträger (10) ist, wenn das Leuchtmodul (1) zusammengebaut ist, und dadurch, dass das optische Element (30) eine Mehrzahl von Lichtleitern (33, 34) umfasst, die jeweils eine Eintrittsseite (33a, 34a) umfassen, welche die Eintrittsseite des optischen Elements (30) bildet, und
    dadurch, dass das optische Element (30) zudem mindestens ebenso viele Lichtleiter wie Lichtquellen (14) umfasst,
    wobei jede der Lichtquellen (14) einem Lichtleiter (33, 34) zugeordnet ist, so dass Lichtstrahlen, die von jeder Lichtquelle (14) ausgesendet werden, in das optische Element (30) durch die Eintrittsseite (33a, 34a) des Lichtleiters (33, 34), dem sie zugeordnet ist, eintreten,
    wobei der Rahmen (20) eine Basis (200) umfasst, über die er mit dem Quellenträger (10) in Kontakt ist, und die orthogonale Projektion des freien Endes mindestens eines der Kontaktstücke (350) auf einer Geraden D, die senkrecht zu der Tangentialebene Ta zu der Basis (200) ist, weiter stromabwärts in Richtung der Basis (200) gelegen ist als die Projektion der Eintrittsseite (33a, 34a) des Lichtleiters, die am weitesten stromabwärts entlang dieser selben Richtung unter allen Projektionen der Eintrittsseiten (33a, 34a) der Lichtleiter (33, 34) gelegen ist, und vor der Montage der aus dem optischen Element (30) und dem Rahmen (20) gebildeten Anordnung an dem Quellenträger (10), jedes Kontaktstück (350) die Tangentialebene Ta zu der Basis (200) schneidet,
    dadurch gekennzeichnet, dass der Ausdehnungskoeffizient des Rahmens (20) sehr viel kleiner als der Ausdehnungskoeffizient der Kontaktstücke (350) ist.
  2. Leuchtmodul (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass der Abstand zwischen der mindestens einen Lichtquelle (14) und der Eintrittsseite des optischen Elements (30) weniger als 0,4 mm beträgt.
  3. Leuchtmodul (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das optische Element (30) eine Mehrzahl von Kontaktstücken (350) umfasst, beispielsweise 2 Kontaktstücke, 3 Kontaktstücke oder 4 Kontaktstücke.
  4. Leuchtmodul (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das mindestens eine Kontaktstück (350) am Umfang der Eintrittsseite des optischen Elements (30) positioniert ist.
  5. Leuchtmodul (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es eine elastische Verbindung (24) zwischen dem optischen Element (30) und dem Rahmen (20) umfasst, die geeignet ist, sich bei der Montage der aus dem Rahmen (20) und dem optischen Element (30) gebildeten Anordnung an dem Quellenträger (10) zu verformen.
  6. Leuchtmodul (1) nach Anspruch 5, dadurch gekennzeichnet, dass die elastische Verbindung (24) aus dem gleichen Material wie das optische Element (30) ausgeführt ist.
  7. Leuchtmodul (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das optische Element (30) und die Kontaktstücke (350) aus einem elastisch verformbaren Material ausgeführt sind.
  8. Leuchtmodul (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Rahmen (20) aus einem Material ausgeführt ist, das elastisch weniger verformbar als das optische Element (30) und die Kontaktstücke (350) ist.
EP19766291.9A 2018-09-19 2019-09-17 Beleuchtungssystem für scheinwerfer und/oder signalleuchte eines kraftfahrzeuges Active EP3853517B1 (de)

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FR1858477A FR3085903B1 (fr) 2018-09-19 2018-09-19 Systeme lumineux pour dispositif d'eclairage et/ou de signalisation d'un vehicule automobile
PCT/EP2019/074907 WO2020058289A1 (fr) 2018-09-19 2019-09-17 Systeme lumineux pour dispositif d'eclairage et/ou de signalisation d'un vehicule automobile

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FR3115856A1 (fr) * 2020-10-29 2022-05-06 Psa Automobiles Sa Fixation d’une lentille de module lumineux de vehicule
JP2022113003A (ja) * 2021-01-22 2022-08-03 スタンレー電気株式会社 車両用灯具
USD1019995S1 (en) * 2021-03-11 2024-03-26 Hasco Vision Technology Co., Ltd. Lens module for automobile lamp

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CN112739948A (zh) 2021-04-30
CN112739948B (zh) 2023-04-04
FR3085903B1 (fr) 2021-06-25
US20210348732A1 (en) 2021-11-11
FR3085903A1 (fr) 2020-03-20
WO2020058289A1 (fr) 2020-03-26
JP7330266B2 (ja) 2023-08-21
EP3853517A1 (de) 2021-07-28
US11435046B2 (en) 2022-09-06

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