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    • 专利摘要:
    The invention relates to a lighting module (10) for a motor vehicle and comprising: - a first light source (121) and a first collimator (122) for generating a first light beam of the "low beam" type in collaboration with a first projection lens (191); and a second (131) and a third (141) light source, the second light source (131) collaborating with a second collimator (132) to generate a first beam complementary to the first light beam to form a second light beam of the type "Driving light". In order to reduce the visibility of a cutoff zone (Zc) in the second beam, the third light source (141) collaborates with a third collimator (142) and / or a second projection lens (192) to form a second complementary beam which overlaps at least part of the cutoff zone (Zc). The invention also relates to a front projector (1) for a motor vehicle and comprising such a lighting module (10).
    公开号:FR3062457A1
    申请号:FR1750842
    申请日:2017-02-01
    公开日:2018-08-03
    发明作者:David Bourdin；Stephane ANDRE；Fabrice MAIRET；Orane MARCHAL；Ran FUJITA；Sergio DONOSO
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    Holder (s): folded.
    VALEO VISION Joint-stock company simO Extension request (s):
    Agent (s):
    VALEO VISION Limited company.
    * 54) LIGHTING MODULE OF A LIGHT BEAM FOR A MOTOR VEHICLE PROJECTOR
    FR 3,062,457 - A1 (© The invention relates to a lighting module (10) for a motor vehicle and comprising:
    - a first light source (121) and a first collimator (122) for generating a first light beam of the “low beam” type in collaboration with a first projection lens (191); and
    - a second (131) and a third (141) light sources, the second light source (131) collaborating with a second collimator (132) to generate a first beam complementary to the first light beam in order to form a second light beam of type " main beam ". In order to reduce the visibility of a cut-off zone (Zc) in the second beam, the third light source (141) collaborates with a third collimator (142) and / or a second projection lens (192) in order to form a second complementary beam which at least partly overlaps the cut-off zone (Zc).
    The invention also relates to a headlight (1) for a motor vehicle and comprising such a lighting module (10).

    -1 "Light beam lighting module for motor vehicle headlamp"
    Technical area
    The present invention is in the field of the automotive industry, and relates more particularly to lighting devices, in particular projectors for motor vehicles. In particular, the present invention relates to a lighting module making it possible to generate at least two light beams.
    State of the art
    In this field, lighting modules are known which make it possible to generate a light beam of the type of a low beam, or code, with a range of around 70 meters, used essentially at night, and the configuration of said light beam is such that it does not dazzle the driver of a crossed or followed motor vehicle. Typically, such a light beam has a cut-off zone taking in particular the form of a contrast change curve of which:
    - a first part is located below the horizon on a first side of the road on which a motor vehicle arriving in the opposite direction is likely to be;
    - a second part is located above the horizon of a second side of the road opposite the first side with respect to a center line of the said road;
    - an intermediate, oblique part, connecting the first part of the second part of the contrast change curve at a central region.
    Lighting modules are known which make it possible to alternately generate a first light beam of the type of low beam described above, and a second light beam of the type of high beam. Such lighting modules use a first light source associated with a first collimator in order to generate the first light beam, and a second light source associated with a second collimator in order to generate a first complementary beam which forms the second light beam in collaboration with the first light beam.
    -2 In the case of a perfectly adjusted lighting module, the first complementary beam generated by the second light source should be shaped, oriented and positioned so as to perfectly juxtapose the first light beam generated by the first light source, so that the second light beam would then have a photometry almost symmetrical with respect to a median axis, the lighting of the road being substantially homogeneous from one side to the other of said road, in particular above the axis of horizon.
    In practice, it is difficult to obtain a photometry that is both symmetrical and homogeneous for a high beam type light beam generated by such lighting modules. In fact, the complementarity of the shaping, the orientation and the positioning of the first complementary beam relative to the first light beam are very difficult to obtain, or even impossible to obtain.
    Subsequently, the lighting modules arranged to alternately generate the first light beam of the low beam type and the second light beam of the high beam type often have a zone of light contrast corresponding to the lack of correspondence between the first light beam and the first complementary beam. This area of contrast can be an area of lower contrast - corresponding to a darker area - if the first complementary beam is distant from the first light beam, or it can be an area of higher contrast - brighter - when the first complementary beam overlaps the first light beam. Often, the contrast zone corresponds at least in part to the cut-off zone of the first light beam.
    Subsequently, the impossibility of optimally adjusting such lighting modules at reasonable costs for the automotive field cause said lighting modules to be the source of discomfort for the driver of the motor vehicle who perceives at least a part of the cut-off zone, in the form of a variation in a lighting density of the part of the road illuminated by the high beam type light beam.
    The object of the present invention is to respond at least in large part to the above problems and also to lead to other advantages by proposing a new lighting module for a motor vehicle.
    Another object of the present invention is to reduce the visibility of the cut-off zone during the generation of a light beam of the type of a high beam for such a lighting module.
    Another object of the present invention is to facilitate the integration of the light modules in a motor vehicle headlamp.
    Statement of the invention
    According to a first aspect of the invention, at least one of the abovementioned objectives is achieved with a lighting module for a motor vehicle, said lighting module comprising (i) a support, (ii) a first light source and a second light source secured to the support, (iii) a first collimator and a second collimator, the first collimator being arranged to collect at least part of the light rays emitted by the first light source, and the second collimator being arranged to collect at least one part of the light rays emitted by the second light source, each collimator also being arranged to redirect said light rays towards a projection lens secured to the support, the projection lens being arranged to shape at least part of the light rays emitted by the light sources in order to:
    _ projecting at least part of the light rays collected by the first collimator into a first light beam comprising a cut-off zone; and _ projecting at least a part of the light rays collected by the first collimator and at least a part of the light rays collected by the second collimator into a second light beam, the part of the light rays collected by the second collimator forming a first beam complementary to the first light beam, said second light beam being formed by said first light beam and said first complementary beam, said first complementary beam being delimited at least in part by the cut-off zone.
    The lighting module according to the first aspect of the invention comprises at least a third light source and an optical device arranged to shape at least part of the light rays emitted by the third light source so as to form a second complementary beam at least partially overlapping the cut-off area of the
    -4first light beam, the third source and the optical device being integral with the support.
    The support of the lighting module according to the first aspect of the invention is a mechanical reference part on which the different elements of said lighting module are referenced in order to allow them to collaborate together in order to generate at least the first and second beams bright to produce a high beam and - alternatively a low beam as described above. By way of nonlimiting example, the support of the lighting module according to the first aspect of the invention can take the form of a plate or at least part of a casing of said lighting module. The support can be metallic or plastic.
    By elements of the lighting module, it is appropriate to understand in particular the first, the second and the third light source, the first and second collimators, the projection lens, as well as, in general, any member of the lighting module. lighting actively or passively participating in its operation.
    The lighting module according to the first aspect of the invention thus comprises at least three separate light sources allowing alternately or cumulatively to respectively form the first light beam or the second light beam. Each light source comprises at least one light emitting element arranged to emit light rays when it is polarized by an electric current. Preferably, the light emitting element takes the form of a light emitting diode emitting at least part of its light rays in the spectral range visible to a human eye. Thus, each light source of the lighting module according to the first aspect of the invention may comprise one or a plurality of light-emitting diodes making it possible to generate the first and / or the second light beam. The light emitting diodes forming each light source are selectively or collectively addressable in order to more precisely illuminate specific areas of the road located in front of the motor vehicle.
    The first and / or second and / or third light sources are integral with the support in order to allow them to collaborate with each other, in particular in order to generate the second light beam and / or to allow alignment along an optical axis of the module d lighting according to the first aspect of the invention and / or with respect to the lens
    -5projection. Advantageously, the first and / or second and / or third light sources are fixed integrally to the support according to any known fixing means, removable or not removable. In particular, each light source can be fixed immobile to the support, through a mechanical connection that does not allow any degree of freedom between the light source and the support. In this case, the position and / or orientation and / or alignment of each light source relative to the support and / or to the projection lens in particular are produced when said light source is mounted on said support, according to an adjustment cannot be changed later. Alternatively, each light source can be fixed to the support through a mechanical connection allowing at least one degree of freedom with respect to the support and / or the projection lens and / or the corresponding collimator, in order to allow adjustment of said light source to achieve for example an optical alignment necessary for the proper functioning of the lighting module.
    In the lighting module according to the first aspect of the invention, each light source is associated with at least one collimator in order to collect at least part of the light rays generated by said corresponding light source and to redirect them towards a particular direction, in particular the projection lens of said lighting module. Advantageously, at least part of the collimators are arranged to form a cut-off profile on the light beam generated by the lighting module, without requiring any additional element, such as for example a metal plate fixed between the first and the second collimator. In this case, the at least one collimator arranged to form the cutoff profile also makes it possible to reflect at least part of the light rays collected by the other collimator (s), towards the projection lens.
    According to a variant of the invention, the lighting module can comprise a plurality of first light sources associated with a plurality of first collimators, and / or a plurality of second light sources associated with a plurality of second collimators, and / or a plurality of third light sources associated with a plurality of third collimators.
    In all the variant embodiments of the invention, the light sources can be addressed selectively or collectively.
    -6Each collimator is made of plastic and / or glass. Advantageously, each collimator is formed from a transparent material having a refractive index greater than the refractive index of air. Polycarbonate (PC) is preferably used which is suitable for withstanding the heat generated by light sources. The choice of this material is particularly advantageous, insofar as the light sources are located near the corresponding collimators. In other embodiments, the collimators can be made of polypropylene carbonate (PPC) or polymethyl methacrylate (PMMA).
    In the lighting module according to the first aspect of the invention, the projection lens is arranged to shape the light rays generated by the light sources and collected by the corresponding collimators in order to form the corresponding light beam and in accordance with a main beam or low beam as described above.
    The projection lens is made of a plastic and / or glass material. Polycarbonate (PC), polypropylene carbonate (PPC) or polymethyl methacrylate (PMMA) will preferably be used.
    The projection lens is integral with the support in order to collaborate with the light source (s) and their respective collimators to generate the first and second light beams to facilitate its alignment relative to the optical axis of the lighting module conforming to the first aspect of the invention. Advantageously, the projection lens is fixed integrally to the support according to any known fixing means, removable or non-removable. In particular, the projection lens can be fixed immovably to the support, through a mechanical connection allowing no degree of freedom between said projection lens and the support. In this case, the position and / or orientation and / or alignment of the projection lens relative to the support and / or to the light sources and / or to the corresponding collimators are produced when said projection lens is mounted on said support, according to a factory setting that cannot be modified later. Alternatively, the projection lens can be fixed to the support through a mechanical connection allowing at least one degree of freedom with respect to said support and / or to the light sources and / or to the corresponding collimators, in order to allow adjustment of said projection lens for its optical alignment necessary for the proper functioning of the lighting module.
    The lighting module in accordance with the first aspect of the invention thus makes it possible to alternately generate the first light beam corresponding to the low beam described above, or the second light beam corresponding to the high beam as described above. Advantageously, the lighting module according to the first aspect of the invention makes it possible to obtain the second light beam by superimposing the second complementary beam on the first and second light rays generated respectively by the first and second light sources. The second complementary beam is generated by the third light source and dedicated specifically to the treatment of the cut-off area of the first light beam and visible in the second light beam of known lighting modules. To this end, the second complementary beam is shaped and / or oriented and / or positioned by the optical device so as to at least partially cover the cutting zone. The optical device can take several forms according to different variants of the invention and which will be described in the following paragraphs. In general, the optical device can comprise a lens and / or a reflector, used alone or in combination with in particular other optical elements such as the third collimator.
    The lighting module according to the first aspect of the invention may advantageously comprise at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:
    - The optical device is arranged to form the second complementary beam so that said second complementary beam is oriented towards a central part of the cutting zone in order to reduce the discomfort linked to said cutting zone;
    - According to a first alternative embodiment, the optical device comprises at least a third collimator for collecting at least part of the light rays emitted by the third light source and for redirecting them so as to overlap at least partially the cut-off zone of the first light beam and / or the second light beam. Optionally, the projection lens arranged to shape at least a portion of the light rays emitted by the first and second light sources forms a first projection lens, and the lighting module comprises a second projection lens of neutral shape with regard to the gaze light rays collected by the third collimator. In this case, the optical device also includes the second projection lens. In this first alternative embodiment, the third collimator collecting the light rays generated by the third light source is configured to directly shape said light rays in order to form the second complementary beam according to the invention. When the optical device comprises the second projection lens, said second projection lens does not play a shaping role: its neutral shape allows the light rays collected by the third collimator to pass without modifying the trajectory thereof. In this case, the second projection lens plays a role of closing the lighting module in accordance with the first aspect of the invention, in order to avoid a loss of performance;
    - According to a second alternative embodiment to the first alternative embodiment, the projection lens arranged to shape at least part of the light rays emitted by the first and second light sources forms a first projection lens, and the optical device includes at least a third collimator for collecting at least a portion of the light rays emitted by the third light source and for redirecting them to a second projection lens configured to project at least a portion of the light rays collected by the third collimator in order to form a second complementary beam overlapping at least in part the cut-off zone of the first light beam and / or of the second light beam. In this case, the optical device comprises the second projection lens. Advantageously, the second projection lens is of cylindrical shape with regard to the light rays collected by the third collimator. In this second alternative embodiment, the third collimator collecting the light rays generated by the third light source collaborates with the second projection lens in order to form the second complementary beam according to the invention. In this case, the second projection lens plays a role in shaping the light rays. The second light beam is thus generated by the lighting module according to the first aspect of the invention by the collaboration of the first and second light sources - associated with their respective collimators - with the first projection lens on the one hand, and the third light source - associated with the third collimator - with the second projection lens;
    - The second and the third collimator can be made from material in order to reduce the manufacturing costs of said collimators and to facilitate the assembly and assembly of the lighting module in accordance with the first aspect of the invention;
    - The third collimator and / or the third light source are located above or below a plane comprising the optical axis of the lighting module in order to reduce the compactness of said lighting module;
    - the second projection lens is located below or above the first projection lens in order to reduce the compactness of the lighting module;
    - According to a first embodiment, the second projection lens is made in one piece with the first projection lens. In other words, the first and second lenses are formed by the same optical part comprising several different optical zones, with different optical properties and / or focal distances, a first optical zone corresponding to the first projection lens, and a second optical zone corresponding to the second projection lens. Alternatively, according to a second embodiment, the second projection lens is attached to the first projection lens and fixed integrally to said first projection lens by fixing means. Optionally, the first projection lens and the second projection lens may be secured to one another by the support, each projection lens being fixedly attached to the support, without said projection lenses being fixedly attached to each other through a direct mechanical connection between them;
    - The first projection lens comprises a single focal plane towards which the first collimator and the second collimator are arranged to redirect the corresponding light rays. This advantageous configuration simplifies the design and assembly of the lighting module;
    - The third collimator is arranged to redirect light rays from the third light source to a focal plane of the second projection lens distinct from the focal plane of the first projection lens;
    - A first focal distance separating the first projection lens from the focal plane of said first projection lens is greater than a second focal distance separating the second projection lens from the focal plane of said second projection lens. Alternatively, a first focal distance separating the first projection lens from the focal plane of said first projection lens is less than a second focal distance separating the second projection lens from the focal plane of said second projection lens;
    at least one of the first and second collimators extends in the direction of the focal plane of the first projection lens to reflect part of the light emitted by the other collimator so as to form the cut-off zone of the first light beam and / or the second light beam;
    - According to a first embodiment, at least one of the first and second collimators is arranged to form the cut-off zone by external reflection of at least part of the light rays collected by the other collimator. In this first embodiment, the external reflection is obtained for example by the application of a metallic coating on at least part of a face of at least one of the first or second collimators situated opposite the other. collimator, preferably parallel - or even tangent - to the optical axis, so that at least some of the light rays collected by the other collimator are reflected on the metal coating so as to be redirected towards the projection lens. According to a second alternative embodiment to the first embodiment, at least one of the first and second collimators is arranged to form the cut-off zone by glass reflection of at least part of the light rays collected by the other collimator. According to a third alternative or complementary embodiment to the first and second embodiments, at least one of the first and second collimators is arranged to form the cut-off zone by total reflection of at least part of the light rays coming from the light source associated. For this purpose, the at least one collimator is formed in a material of refractive index such as a light ray arriving on a wall of the at least one collimator with an angle of incidence greater than a predetermined value, is totally reflected on this wall, without a non-negligible part of the energy of said light ray being transmitted through said wall;
    - at least one of the first and second collimators comprises a reflective coating disposed on a part of said collimator and intended to reflect at least a part of the light rays collected by the other collimator in order to allow total reflection as described above;
    - the part of the collimator on which the coating is arranged extends from the focal plane towards the corresponding light source;
    - the first and / or the second and / or the third collimator are separated by a medium of refractive index lower than a refractive index of said collimators:
    - The first and / or the second and / or the third light sources are arranged so as to emit light rays in directions substantially parallel to an optical axis of the lighting module.
    According to a second aspect of the invention, there is provided a motor vehicle headlamp comprising at least one lighting module in accordance with the first aspect of the invention or according to any one of its improvements.
    Various embodiments of the invention are provided, integrating according to all of their possible combinations the different optional characteristics set out here.
    Description of the figures
    Other characteristics and advantages of the invention will appear further from the following description on the one hand, and from several exemplary embodiments given by way of non-limiting indication with reference to the appended schematic drawings on the other hand, in which :
    - FIGURE 1 illustrates a perspective view of an exemplary embodiment of a headlight for a motor vehicle according to the second aspect of the invention;
    - FIGURE 2 illustrates a side view of an exemplary embodiment of a light module according to the first aspect of the invention;
    - FIGURE 3 illustrates a top view of the embodiment of the light module illustrated in FIGURE 2
    FIGURES 4A, 4B and 4C respectively illustrate a first light beam generated by the lighting module illustrated in the preceding FIGURES, a first beam complementary to the first light beam and a second complementary beam making it possible to reduce the light contrast at the level of the break zone.
    Of course, the characteristics, the variants and the various embodiments of the invention can be associated with one another, according to various combinations, insofar as they are not incompatible or mutually exclusive of each other. One can in particular imagine variants of the invention comprising only a selection of characteristics described below in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from in the prior art.
    In particular, all the variants and all the embodiments described can be combined with one another if nothing is technically opposed to this combination.
    In the figures, the elements common to several figures keep the same reference.
    Detailed description of the invention
    In the following description, the designations "longitudinal", "lateral", "above", "below", "front", "behind" refer to the orientation of the light module as it is intended to be integrated in a headlight of a motor vehicle. More particularly, a longitudinal direction corresponds to an optical axis A along which the light rays generated by the lighting module 100 extend mainly. The lateral orientation corresponds to a first direction perpendicular to the optical axis A and which extends horizontally. Finally, the vertical direction corresponds to a second direction perpendicular to the optical axis A and to the first perpendicular direction, the vertical direction extending vertically.
    With reference to LIGURE 1, a headlamp 1 for a motor vehicle is shown, and more particularly a front headlamp, the headlamp 1 comprising a lighting module 10 arranged to generate and project one or more types of light beams on a road. In particular, the lighting module 10 is arranged to be able to generate alternately or simultaneously a light beam of the low beam type and a light beam of the high beam type. As described above, the low beam type light beam has a cut-off zone Zc in order to avoid dazzling the conductors of the
    -13 vehicles traveling in opposite directions on the road; and the high beam type light beam has the desired road lighting without cutoff profile. To this end, and in accordance with the first aspect of the invention, the lighting module 10 implements an optical device making it possible to improve the homogeneity of the lighting of the high beam type beam, in particular by reducing the variations of light contrast at the cut-off zone Zc. The specific features of the lighting module 10 in accordance with the first aspect of the invention will be described more particularly with reference to FIGURES 2 and 3.
    The projector 1 comprises a mounting plate 15 situated on the rear face of said projector and on which are mounted light sources and collimators 122, 132 of the lighting module 10. The mounting plate is associated with a housing 18 held by lugs fixing 17 located on the periphery of the mounting plate 15, preferably on the lateral edges of the projector 1. Towards the front, the projector 1 is closed by a transparent glass 11 which can be crossed by the light beams generated and projected by the module lighting 10 according to the first aspect of the invention. In general, the projector 1 can thus receive in its internal volume, delimited in particular by the housing 18, the support plate 15 and the transparent glass 11, a plurality of light modules 10 in accordance with the first aspect of the invention.
    Advantageously, such a lighting module 10 forms a unitary sub-assembly: it is arranged so as to be able to create and shape at least the beams of the main beam and low beam type described above, without having to be associated with other light sources located outside said lighting module 10. The lighting module 10 is secured to the projector housing via an adjustment means making it possible to modify a height of the optical axis A, and / or a lateral direction.
    In order to dissipate the calories produced in particular by the light sources and / or their associated electronics, the projector 1 comprises a heat exchanger which here takes the form of a fin dissipator 16. The fins are arranged on the support plate 15, opposite transparent glass 11, and peripherally to said light sources and / or collimators 122, 132. Optionally, the projector 1 may also include another heat sink with fins located on the rear face of said projector 1, opposite the dissipator with fins 16 relative to the support plate 15.
    The lighting module 10 comprises at least one visible light source in FIGS. 2 and 3. It also comprises at least one projection lens 2 arranged in the lighting module 10 so as to be traversed by the light rays emitted by the light source. Such a projection lens participates in the formation of the desired light beam, whether it is a beam of the low beam type or a beam of the high beam type. The projection lens 2 forms a first longitudinal end of the lighting module 10.
    With reference to LIGURES 2 and 3, an exemplary embodiment of a lighting module 10 in accordance with the first aspect of the invention will now be described in more detail.
    The lighting module 10 includes:
    - the support plate 15;
    a first light source 121 associated with the first collimator 122 arranged on the one hand to collect at least part of the light rays emitted by at least the first light source 121 and on the other hand to redirect said light rays to a first projection lens 191 secured to the support plate 15;
    - A second light source associated with the second collimator 132 arranged on the one hand to collect at least part of the light rays emitted by at least the second light source 131 and on the other hand to redirect said light rays towards the first projection lens 191 .
    The first projection lens 191 is arranged along the optical axis A. It is arranged to project the light rays collected by at least the first and second collimators 122, 132 in order to produce one of the two lighting modes described previously, depending on the ignition of one or both light sources 121, 131. In other words, the first projection lens 191 makes it possible to:
    _ projecting at least part of the light rays collected by the first collimator 122 into a first light beam comprising a cut-off zone Zc; and _ projecting at least a part of the light rays collected by the first collimator 122 and at least a part of the light rays collected by the second collimator 132 into a second light beam, the part of the light rays collected by the second collimator 132 forming a first complementary beam of the first
    Light beam, said second light beam being formed by said first light beam and said first complementary beam, said first complementary beam being delimited at least in part by the cut-off zone Zc.
    The first projection lens 191 is preferably of the converging type. The first projection lens 191 is integral with the lighting module 10, and more particularly with the support plate 15, by means of at least one lens support - not shown allowing the mechanical support of the first lens to be produced. projection 191 and a mechanical referencing of the position of the first projection lens 191 relative to the first 121 and second 131 light sources.
    According to the first aspect of the invention, the lighting module 10 comprises at least a third light source 141 and an optical device 142, 192 arranged to shape at least part of the light rays emitted by the third light source 141 of so as to form a second complementary beam overlapping at least partially the cut-off zone Zc of the first light beam and / or of the second light beam.
    The first light beam corresponds to the beam of the low beam type described above; and the second light beam corresponds to the high beam type beam described above.
    The first 121, the second 131 and the third 141 light sources are integral with the support plate 15. For example, they are welded to the support plate 15.
    In the example illustrated in FIGURES 2 and 3, the lighting module 10 comprises a second projection lens arranged to form the second complementary beam overlapping at least in part the cut-off zone Zc of the first light beam and / or the second light bleam. Thus, in this exemplary embodiment, the optical device 142, 192 is formed by the second projection lens 192 and by the third collimator 142 configured to collect the light rays generated by the third light source 141 and to redirect them to said second lens projection 192.
    As described above, each light source 121, 131, 141 is assigned to the generation of light rays and allows, alone or in combination, in collaboration with the collimators 122, 132, 142 and the first projection lens 191 and / or the second
    -16 projection lens 192 to project a light beam of the "low beam" or "high beam" type.
    To this end, the light sources are advantageously located in the same plane shown in FIGURE 2 by the plane of the support plate 15. Optionally, the light sources can be located in different planes. Advantageously, they are all integral with the same support.
    In the exemplary embodiment, the second projection lens 192 is made in one piece with the first projection lens 19 E Optionally, the second projection lens 192 can be attached to the first projection lens 191. The second projection lens 192 is advantageously located below the first projection lens 191
    FIGURE 2 showing the lighting module 10 in a sectional view along a vertical plane, the light sources 121, 131, 141 and their respective collimators 122, 132, 142 are distributed vertically one above the other. More particularly, the first light source 121 and the second light source 131 are located on a first side of the optical axis A, and the third light source 141 is located on a second side of the optical axis A, opposite to said first side with respect to said optical axis A. Furthermore, the first light source 121 is located at a greater distance from the optical axis A than the second light source 131.
    Similarly, the first collimator 122 and the second collimator 132 are located on the first side of the optical axis A, and the third collimator 142 is located on the second side of the optical axis A, opposite said first side relative to said axis optical A. In addition, the first collimator 122 is located at a greater distance from the optical axis A than the second collimator 132.
    In general, the configuration of the collimators 122, 132, 142 is identical to the configuration of the light sources 121, 131, 141.
    Of course, other configurations of the first 121, second 131 and third 141 light sources and / or the first 122, second 132 and third 142 collimators could be envisaged without departing from the context of the present invention.
    In the example of embodiment illustrated in FIGS. 2 and 3, the first and second collimators 122, 132 are configured to redirect the light rays generated by the first and second light sources 121, 131 towards a first FIA focus and a second focus F1B of the first projection lens 191; and the third collimator 142 is configured to redirect the light rays generated by the third light source 141 towards a focus F2 of the second projection lens 192. Advantageously, the first FIA and second F1B foci of the first projection lens 191 are located in the same focal plane perpendicular to the optical axis A. Optionally, the first FIA and second F1B foci of the first projection lens 191 can be located in different focal planes.
    Similarly, the focal point F2 of the second projection lens 192 on the one hand and the first FIA and second F1B focal points of the first projection lens 191 on the other hand are located in different focal planes. A focal distance separating the first FIA and second F1B focal points from the first projection lens 191 is less than a focal distance separating the focal point F2 from the second projection lens 192.
    In the horizontal plane illustrated in FIGURE 3, the lighting module 10 comprises a plurality of light sources and collimators in order to increase the lighting power available for said lighting module 10, and to make it conform to standards lighting in force in the automotive field. Each light source comprises at least one light-emitting diode and / or a laser diode. More specifically:
    - The first light source 121 comprises a first lighting element 121a located near the optical axis A, a second lighting element 121b located on a first side of the optical axis A and a third lighting element 121c located on a second side of the optical axis, opposite the first side with respect to the first lighting element 121a, and preferably in a symmetrical configuration;
    the second light source 131 comprises a first lighting element 131a located near the optical axis A, a second lighting element 131b located on a first side of the optical axis A and a third lighting element 131c located on a second side of the optical axis, opposite the first side with respect to the first lighting element 131a, and preferably in a symmetrical configuration;
    the third light source 141 comprises a first lighting element 141a located near the optical axis A, a second lighting element 141b located on a first side of the optical axis A and a third lighting element 141c located on a second side of the optical axis, opposite the first side with respect to the first lighting element 141a, and preferably in a symmetrical configuration.
    Each collimator 122, 132, 142 extends in the direction of the first 191 and / or the second 192 projection lens to reflect at least part of the light rays coming from the light source 121, 131, 141 with which they are associated .
    The lighting module 10 comprises an optical element 20 arranged to reflect at least part of the light rays in order to define the cut-off zone Zc of the first light beam projected by the lighting module 10. In the example illustrated in the LIGURE 2, the optical element 20 is formed by a so-called folding metal plate.
    Preferably, the optical element 20 is formed by an axial extension along the optical axis A of the first collimator 122 which can extend in the direction of the first lens to the first and second focal points Lia, Elb of the first projection lens 191 in order to reflect at least part of the light rays collected by one and / or the other of the first 122 and / or second 132 collimators to form the cut-off zone Zc of the first light beam projected by the module lighting 10 and / or the second light beam projected by the lighting module 10.
    To this end, in this preferred embodiment, the optical element 20 comprises a surface for reflecting the light coming from the second collimator 132. More specifically, the cut-off zone Zc is produced by a surface element of the optical element 20 located near the first and / or second focal point Fia, Flb of the first projection lens 191, said surface element forming a diopter between the first collimator 122 and an ambient medium of the lighting module 10, preferably consisting of air . The cut-off zone Zc is implemented by a partial external reflection of the glassy reflection type.
    According to its first aspect, and as visible in FIGURES 4A, 4B and 4C, the lighting module 10 makes it possible to generate:
    a first light beam of the "low beam" type by the generation of light rays by the first light source 121, the light rays of which are collected by the first collimator 122 and sent in the direction of the first projection lens 191. Such a first light beam is illustrated in FIGURE 4A;
    - a second high beam type light beam by simultaneously:
    o the generation of the first light beam described above;
    o the generation of a first complementary beam thanks to the second light source 131 and whose light rays are collected by the second collimator 132 and sent in the direction of the first projection lens 191. Such a first complementary beam is illustrated in FIGURE 4B. the first complementary beam illuminates a part of the road located above the cut-off zone Zc of the first light beam and located in the center of the road. It can be seen that the cut-off zone Zc is always visible on the first complementary beam;
    o the generation of a second complementary beam thanks to the third light source 141 and whose light rays are sent towards the optical device 142, 192. Such a second complementary beam is illustrated in FIGURE 4C, making it possible to blur the visibility of the cut-off zone Zc once combined with the first light beam and the first complementary beam.
    Thus, according to the invention in accordance with its first aspect, the lighting module 10 makes it possible to produce a second light beam of the "high beam" type in which the cut-off zone Zc is blurred thanks to the generation of the second complementary beam.
    According to a first alternative embodiment of the invention, the optical device 142, 192 comprises the third collimator 142 arranged to collect at least part of the light rays emitted by the third light source 141 and to redirect them so as to overlap at least in part of the cut-off zone Zc. In this first alternative embodiment, the third collimator is arranged to allow directly - without any other optical component - to shape the second complementary beam so that it reaches a central region of the road and slightly above the cut-off zone Zc in order to at least partially overlap said cut-off zone Zc.
    Optionally, as an alternative to the third collimator, the optical device 142, 192 may comprise a lens or a reflector making it possible to collect the light rays generated
    -20 by the third light source in order to shape them and redirect them along the optical axis A so as to overlap at least partially the cut-off zone Zc.
    Advantageously, the optical device 142, 192 of the lighting module 10 can comprise the second projection lens 192 of neutral shape with regard to the light rays collected by the third collimator 142 in order to protect the lighting module 10.
    According to a second alternative embodiment of the invention, the optical device 142, 192 comprises the third collimator 142 and the second projection lens 192. In this case, the third optical collimator 142 is arranged to collect at least part of the light rays emitted by the third light source 141 and to redirect them towards the second projection lens 192. Unlike the first alternative embodiment, the third collimator 142 does not shape the collected light rays so that they are configured to at least partially overlap the cut-off zone Zc; it is the second projection lens 192 which performs this function of shaping the second complementary beam. To this end, the second projection lens 192 is advantageously of cylindrical shape.
    The collimators 122, 132, 142 are advantageously formed from a transparent material having a refractive index greater than the refractive index of air, preferably polycarbonate (PC) adapted to withstand the heat generated by the sources. luminous 121, 131, 141 or a material comprising at least in part polypropylene carbonate (PPC) or polymethyl methacrylate (PMMA).
    In summary, the invention relates in particular to a lighting module for a motor vehicle and comprising:
    - a first light source and a first collimator for generating a first light beam of the “low beam” type in collaboration with a first projection lens; and
    - A second and a third light sources, the second light source collaborating with a second collimator to generate a first beam complementary to the first light beam in order to form a second light beam of the "high beam" type. In order to reduce the visibility of a cut-off zone Zc in the second beam, the third light source collaborates with a third collimator and / or a second projection lens in order to form a second complementary beam which at least partly overlaps the zone of Zc break.
    Of course, the invention is not limited to the examples which have just been described and numerous modifications can be made to these examples without departing from the scope of the invention. In particular, the different characteristics, forms, variants and embodiments of the invention can be associated with each other in various combinations as long as they are not incompatible or mutually exclusive. In particular, all the variants and embodiments described above can be combined with one another.
    权利要求:
    Claims (22)
    [1" id="c-fr-0001]
    Claims
    1. Lighting module (10) for a motor vehicle, said lighting module (10) comprising:
    - a support (15);
    - a first light source (121) and a second light source (131) integral with the support (15);
    - a first collimator (122) and a second collimator (132), the first collimator (122) being arranged to collect at least part of the light rays emitted by the first light source (121) and the second collimator (132) being arranged to collect at least part of the light rays emitted by the second light source (131), each collimator also being arranged to redirect said light rays to a projection lens (191) secured to the support (15);
    the projection lens (191) being arranged to shape at least part of the light rays emitted by the light sources in order to:
    o projecting at least a part of the light rays collected by the first collimator (122) into a first light beam comprising a cut-off zone (Zc); and o projecting at least part of the light rays collected by the first collimator (122) and at least part of the light rays collected by the second collimator (132) in a second light beam, the part of the light rays collected by the second collimator (132) forming a first beam complementary to the first light beam, said second light beam being formed by said first light beam and said first complementary beam, said first complementary beam being delimited at least in part by the cut-off zone (Zc);
    characterized in that the lighting module (10) comprises at least a third light source (141) and an optical device (142, 192) arranged to shape at least part of the light rays emitted by the third light source ( 141) so as to form a second complementary beam overlapping at least in part the cut-off zone (Zc) of the first light beam, the third source (141) and the optical device (142, 192) being integral with the support (15).
    [2" id="c-fr-0002]
    2. Lighting module (10) according to claim 1, in which the optical device (142, 192) is arranged to form the second complementary beam so that said second complementary beam is oriented towards a central part of the zone. cutoff (Zc).
    [3" id="c-fr-0003]
    3. Lighting module (10) according to claim 1 or 2, wherein the optical device (142, 192) comprises at least a third collimator (142) for collecting at least part of the light rays emitted by the third light source (141) and to redirect them so as to overlap at least in part the cut-off zone (Zc) of the first light beam and / or of the second light beam.
    [4" id="c-fr-0004]
    4. Lighting module (10) according to the preceding claim, wherein the projection lens arranged to shape at least part of the light rays emitted by the first (121) and second (131) light sources forms a first lens projection (191), the lighting module (10) comprising a second projection lens (192) of neutral shape with regard to the light rays collected by the third collimator (142).
    [5" id="c-fr-0005]
    5. Lighting module (10) according to claim 1 or 2, wherein the projection lens arranged to shape at least part of the light rays emitted by the first (121) and second (122) light sources forms a first projection lens (191), and wherein the optical device (142, 192) comprises at least a third collimator (142) for collecting at least part of the light rays emitted by the third light source (141) and for redirecting them to a second projection lens (192) configured to project at least part of the light rays collected by the third collimator (142) in order to form a second complementary beam overlapping at least partially the cut-off zone (Zc) of the first light beam and / or the second light beam.
    [6" id="c-fr-0006]
    6. Lighting module (10) according to the preceding claim, wherein the second projection lens (192) is cylindrical in shape with regard to the light rays collected by the third collimator (142).
    [7" id="c-fr-0007]
    7. Lighting module (10) according to any one of claims 3 to 6, wherein the third collimator (142) and / or the third light source (141) are located above or below a plane comprising an optical axis (A) of the lighting module (10).
    [8" id="c-fr-0008]
    8. Lighting module (10) according to any one of claims 4 to 7, wherein the second projection lens (192) is located below or above the first projection lens (191).
    [9" id="c-fr-0009]
    9. Lighting module (10) according to any one of claims 4 to 8, wherein the second projection lens (192) is made in one piece with the first projection lens (191).
    [10" id="c-fr-0010]
    10. Lighting module (10) according to any one of claims 4 to 8, in which the second projection lens (192) is attached to the first projection lens (191) and fixed integrally to said first projection lens (191) by fixing means.
    [11" id="c-fr-0011]
    11. Lighting module (10) according to any one of claims 4 to 10, in which the first projection lens (191) comprises a single focal plane towards which the first collimator (122) and the second collimator (132) are arranged to redirect the corresponding light rays.
    [12" id="c-fr-0012]
    12. Lighting module (10) according to any one of claims 4 to 11, wherein the third collimator (142) is arranged to redirect light rays from the third light source (141) to a focal plane of the second lens projection lens (192) separate from the focal plane of the first projection lens (191).
    [13" id="c-fr-0013]
    13. The lighting module (10) according to claim 12, in which a first focal distance separating the first projection lens (191) from the focal plane of said first projection lens (191) is greater than a second focal distance separating the second projection lens (192) of the focal plane of said second projection lens (192).
    [14" id="c-fr-0014]
    14. The lighting module (10) according to claim 12, in which a first focal distance separating the first projection lens (191) from the focal plane of said first projection lens (191) is less than a second focal distance separating the second projection lens (192) of the focal plane of said second projection lens (192).
    [15" id="c-fr-0015]
    15. Lighting module (10) according to any one of the preceding claims, in which at least one of the first (122) and second (132) collimators extends in the direction of the focal plane of the first projection lens (191 ) to reflect a part of the light emitted by the other collimator (122, 132) so as to form the cut-off zone (Zc) of the first light beam and / or of the second light beam.
    [16" id="c-fr-0016]
    16. Lighting module (10) according to any one of claims 1 to 15, in which at least one of the first (122) and second (132) collimators is arranged to form the cut-off zone (Zc) by external reflection at least part of the light rays collected by the other collimator (122, 132).
    [17" id="c-fr-0017]
    17. Lighting module (10) according to any one of claims 1 to 15, in which at least one of the first (122) and second (132) collimators is arranged to form the cut-off zone (Zc) of the first beam light by glassy reflection of at least part of the light rays collected by the other collimator (122, 132).
    [18" id="c-fr-0018]
    18. Lighting module (10) according to any one of the preceding claims, in which at least one of the first (122) and second (132) collimators comprises a reflective coating disposed on a part of said collimator (122, 132) and intended to reflect at least part of the light rays collected by the other collimator (122, 132).
    [19" id="c-fr-0019]
    19. Lighting module (10) according to the preceding claim, in which the part of the collimator (122, 132) on which the coating is arranged extends from the focal plane in the direction of the light source (121, 131) corresponding.
    [20" id="c-fr-0020]
    20. Lighting module (10) according to any one of the preceding claims, in which the first (122) and / or the second (132) and / or the third (142) collimator are separated by an index medium of refraction lower than a refractive index of said collimators (122, 132, 142).
    5
    [21" id="c-fr-0021]
    21. Lighting module (10) according to any one of the preceding claims, in which the first (121) and / or the second (131) and / or the third (141) light sources are arranged so as to emit light rays in directions substantially parallel to the optical axis (A) of the lighting module (10).
    [22" id="c-fr-0022]
    22. Motor vehicle headlamp (1) comprising at least one lighting module (10) 10 according to any one of the preceding claims.
    1/2
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    法律状态:
    2018-02-26| PLFP| Fee payment|Year of fee payment: 2 |
    2018-08-03| PLSC| Search report ready|Effective date: 20180803 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 4 |
    2021-02-26| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1750842|2017-02-01|
    FR1750842A|FR3062457B1|2017-02-01|2017-02-01|LIGHTING MODULE FOR A LIGHT BEAM FOR AUTOMOTIVE VEHICLE HEADLIGHT|FR1750842A| FR3062457B1|2017-02-01|2017-02-01|LIGHTING MODULE FOR A LIGHT BEAM FOR AUTOMOTIVE VEHICLE HEADLIGHT|
    EP18153896.8A| EP3357752A1|2017-02-01|2018-01-29|Lighting module of a light beam for a motor vehicle headlight|
    US15/886,436| US10267477B2|2017-02-01|2018-02-01|Light beam lighting module for motor vehicle headlight|
    CN201810104077.1A| CN108375042B|2017-02-01|2018-02-01|Beam lighting module for a motor vehicle headlight|
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