WO2024002727A1 - Light module for a motor vehicle - Google Patents

Light module for a motor vehicle Download PDF

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Publication number
WO2024002727A1
WO2024002727A1 PCT/EP2023/066308 EP2023066308W WO2024002727A1 WO 2024002727 A1 WO2024002727 A1 WO 2024002727A1 EP 2023066308 W EP2023066308 W EP 2023066308W WO 2024002727 A1 WO2024002727 A1 WO 2024002727A1
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WO
WIPO (PCT)
Prior art keywords
light
local deformation
light module
projection lens
light rays
Prior art date
Application number
PCT/EP2023/066308
Other languages
French (fr)
Inventor
Antoine HARIVEL
Lu Bai
Original Assignee
Valeo Vision
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision filed Critical Valeo Vision
Publication of WO2024002727A1 publication Critical patent/WO2024002727A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/26—Elongated lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions

Definitions

  • the present invention relates to the field of lighting devices embedded in a motor vehicle.
  • the field of lighting of motor vehicles is subject to regulations which require that the lighting system of each motor vehicle be capable of projecting light beams fulfilling lighting functions respecting specific safety standards, and in particular a function high beam type lighting function and a low beam type lighting function.
  • the low beam type lighting function allows a motor vehicle to be seen by other users and its driver to properly see the roadway up to 30 meters away, without dazzling users on the road.
  • the high beam function emits light beams with a longer range, so that the driver of the motor vehicle can clearly see the roadway, at least 200 meters away, particularly in nighttime conditions.
  • These low beam and high beam lights can be implemented by light modules, which are integrated into light devices arranged on the front of motor vehicles.
  • Such light modules include in particular a light source, an optical element comprising a reflective surface, and a projection lens.
  • the light source can for example take the form of light-emitting diodes, installed on at least one printed circuit board, which is generally placed on a support such as a radiator integrated into the light module.
  • the light source which emits a plurality of light rays omnidirectionally, and the optical element are arranged relative to each other so that the optical element can collect and/or reflect the light rays emitted by the diodes electroluminescent in order to form a beam and direct it towards the projection lens according to a predetermined distribution.
  • the optical element In light modules intended to generate a low beam beam, it is known to extend the optical element with a flat cutting surface having in particular the role of cutting the light rays emitted by the light source and preventing them from propagating in output of the light module.
  • the light module is configured so that light rays which encounter this cutoff surface emanating directly from the light source are blocked in the light module.
  • some of the light rays emitted from the light source and reflected by the optical element may encounter the planar cutting surface with an angle of incidence such that they are directed towards the projection lens and form stray light rays.
  • These parasitic light rays can locally increase the light intensity of the light beams forming the low beam function, and this lack of homogeneity of the low beam beam can cause discomfort for the user of the vehicle or road users. coming, for example, in the opposite direction.
  • the present invention aims to overcome the drawbacks of the prior art, in particular by proposing a light module capable of cutting the light beams in accordance with the regulations in force and of limiting the number of parasitic light rays reaching the projection lens.
  • the main object of the present invention is a light module for a lighting device of a vehicle, comprising at least one light source capable of emitting light rays and a collector comprising a reflective surface intended to collect and reflect the less a part of the light rays emitted by said light source in the direction of a projection lens of the light module to form a lighting beam, characterized in that it comprises a flat cutting surface extending the reflective surface of the collector in the direction of the projection lens, the planar cutting surface comprising a local deformation forming a deflection zone of the light rays deflected by the reflecting surface of the collector.
  • Such a light module with at least one light source whose light rays are reflected by a reflective surface in the direction of the projection lens and a planar cut-off surface, makes it possible to generate a focused lighting beam with a cut-off edge to perform a “low beam” type lighting function.
  • the planar optical surface extending from the reflective surface towards the projection lens is configured to generate the cutoff edge of said illumination beam.
  • the flat optical surface makes it possible to limit the height of the light beam leaving the light module so as not to dazzle road users when the vehicle is traveling with the "low beam” lighting mode.
  • the cut-off surface is sized and oriented relative to the reflecting surface to block part of the rays emitted by the light source and prevent them from reaching the projection lens, in particular by deflecting them towards a zone where they are absorbed or deflected away from the projection lens.
  • the planar cutting surface is configured to locally include a local deformation, that is to say in other words a cavity, forming a zone of local deviation of certain of the light rays emitted by the light source and deflected by the reflecting surface.
  • This local deformation makes it possible to deflect the light rays towards a portion of the light module which is distinct from the projection lens.
  • the local deformation is delimited by a peripheral edge formed by a rounding.
  • the delimitation of the local deformation by a peripheral edge formed by a rounding, and not by a sharp edge, makes it possible to control the homogeneity of propagation of the light rays deviated by the local deformation.
  • the local deformation comprises a diffusing surface on at least part of its surface.
  • This diffusing surface of the cavity forming the local deformation makes it possible to diffuse and effectively deflect the light rays reaching the local deformation.
  • the diffusing surface may in particular have a plurality of reliefs forming a succession of projections and hollows. The reliefs of the diffusing surface can be obtained, for example, by a process of graining the diffusing surface.
  • the majority, preferably all, of the light rays reaching the local deformation are deflected by an angle greater than or equal to 60°. For each light ray reaching the local deformation, this deviation angle is measured between the direction of the light ray before it reaches the local deformation and the direction of the light ray after deflection by the local deformation.
  • the local deformation is configured to direct a part, preferably the majority, of the light rays reaching the local deformation away from the projection lens.
  • the local deformation is configured to direct at least 85% of the light rays reaching the local deformation away from the projection lens.
  • This rate of light rays deflected towards a portion of the light module distinct from the projection lens is advantageously obtained by the dimensions, the surface condition as well as the position on the plane cut-off surface of the local deformation.
  • the deflection surface may include reliefs such as prisms, to deflect the light rays deviated by the local deformation, or include a coating configured to absorb the light rays deviated by the local deformation.
  • the deflection surface is configured to absorb or deflect the light rays towards a portion of the light module different from the projection lens.
  • the local deformation has an oblong shape whose main axis of elongation is directed towards the projection lens.
  • the local deformation has a dimension, along the main axis of elongation, of at least 10 mm.
  • the light source is configured to form a lighting beam along an optical axis, the main elongation axis and the optical axis being substantially parallel.
  • the projection lens is configured so that a focus of the projection lens is arranged at a rear end edge of the collector, opposite the flat cutting surface . In this way, the projection lens is configured to form an image of the reflective surface of the collector.
  • the local deformation extends in a direction of depression perpendicular to the main plane of extension for at least 2 mm.
  • the light source, the reflecting surface, the planar cut-off surface and the projection lens are configured and arranged relative to each other to generate a cut-off lighting beam.
  • the light module according to the invention is intended to perform the “low beam” type lighting function of the motor vehicle.
  • FIG. 1 is a schematic representation of the subassembly generating the “low beam” lighting function in which light rays emitted by a light source and deflected by a reflective surface are made visible, some of these rays being deflected by local deformation.
  • the characteristics, variants and different embodiments of the invention can be associated with each other, in various combinations, to the extent that they are not incompatible or exclusive with respect to each other.
  • variants of the invention comprising only a selection of characteristics described subsequently in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage and/or to differentiate the invention. compared to the prior art.
  • the designations "longitudinal”, “transverse” and “vertical” refer to the orientation of the light module according to the invention, with in particular a longitudinal direction which corresponds to a main direction of emission of the light rays exiting this light module, this longitudinal direction being parallel to a longitudinal axis L of a mark L, V, T illustrated in the figures.
  • a vertical direction and a transverse direction correspond respectively to directions parallel to a vertical axis V and a transverse axis T of the reference frame L, V, T.
  • Figures 1 and 2 respectively represent a general view of a light module 1 and a sectional view of said light module 1 according to the section plane AA visible on the .
  • the light module 1 extends in a direction of main longitudinal elongation, substantially parallel to the axis L, and which corresponds to the direction of elongation of the motor vehicle that it is intended to equip.
  • the light module 1 is, in the embodiments shown, a light module capable of generating a first lighting function according to a “low beam” lighting mode generated by a first subassembly S1 of the light module 1, and a second lighting function according to a “high beam” lighting mode generated by a second sub-assembly S2 of the light module 1.
  • the light module 1 is here a module with dual light function, that is that is to say a module comprising a support 2 on either side of which are arranged two subassemblies S1, S2 configured to emit light beams that are different from each other.
  • the invention consists in particular, as will be described below, of providing a zone of deflection of parasitic light rays on a cut-off surface extending a reflective surface, in a part of a light module intended to generate a first function lighting according to a “low beam” lighting mode, whether or not the light module comprises two sub-assemblies with a second sub-assembly capable of generating a second lighting function according to a lighting mode " Redlights ".
  • the first subassembly S1, and here also the second subassembly S2, is configured to direct light rays towards a projection lens 3 which here participates in forming the first and second lighting functions.
  • the light module 1 further comprises a radiator 4 configured to evacuate the calories generated by the operation of the light sources of the light module 1.
  • the radiator 4 and the support 2 here form a common part, in one piece.
  • the support 2 forms a substantially flat surface extending along a longitudinal and transverse plane, substantially parallel to the axis L and to the axis T.
  • the flat surface of the support 2 has a first face 21 and a second face 22, these faces 21 and 22 being opposite in the vertical direction, substantially parallel to the axis V.
  • a zone for receiving a printed circuit board of each of the subassemblies S1, S2 is formed on each of these faces.
  • the first subassembly S1 comprises a printed circuit board 5, fixed on the first face 21 of the support 2, several light sources 6 fixed on the printed circuit board 5, one of which is visible in the sectional view of the , and several collectors 7 configured respectively to deflect the light rays emitted by one of the light sources towards the projection lens 3.
  • the first subassembly S1 comprises on the one hand a first set 81 of four collectors 7 arranged respectively opposite one of the light sources and configured to form a lower part of the “low beam” lighting function , with a rectilinear cut-off, and in particular a horizontal cut-off, and on the other hand a second set 82 and a third set 83 of collectors, arranged on either side of the first set 81 and configured to form an additional part of the function “low beam” lighting and in particular a particular cut-off profile, for example a horizontal cut-off with a projection.
  • the second set 82 of collectors comprises a single collector and the third set 83 of collectors comprises two collectors arranged respectively facing a light source.
  • Each of the sets of collectors 81, 82, 83 comprises one or more reflective surfaces arranged facing a corresponding light source and which are extended towards the projection lens by a cut-off surface 71, 85 which helps to block some of the light rays emitted by the light sources to give a regulatory appearance to the light beam generated by the projection lens after reflection by this set of collectors.
  • the third set 83 of collectors and more particularly still one of the collectors 7 of this third set 83, insofar as it comprises the zone of deviation of parasitic light rays according to the invention , as mentioned previously, but it should be noted that a deviation zone could, without departing from the context of the invention, be implemented on each of the cutting surfaces, or at least on several cutting surfaces.
  • the collector 7 of this third assembly 83 through which the cutting plane A-A passes, and which will subsequently be described as the collector 7, comprises a reflective surface 72, arranged opposite a light-emitting diode 6, and a flat cutting surface 71 which extends the reflective surface 72 in the direction of the projection lens 3.
  • the deflection zone 74 is formed on this flat cutting surface 71, here by the production of a convex part opposite the inside the light module.
  • the reflective surface 72 forms an internal face of the collector, facing towards the interior of the light module and in particular towards a light source 6, and this reflective surface 72 is configured such that the rays light emitted omnidirectionally by said light source 6 are reflected on the reflective surface 72 in the direction of the projection lens 3.
  • the reflecting surface 72 of the collector 7 can have, in section in a plane passing through the light source and comprising the longitudinal axis L, an elliptical or parabolic shape, with the light source 6 which is arranged in the vicinity of a focus of this reflective surface so that the collector can collect the light rays emitted by the light source 6 and reflect them towards the projection lens 3.
  • the reflective surface 72 has a rear end edge 73, arranged opposite the projection lens 3.
  • the light module can be configured so that this projection lens 3 has an object focus which is substantially in the vicinity of the edge rear end edge 73, and this projection lens is thus configured to form an image of the reflective surface 72 of the collector 7, with a very sharp edge of the image corresponding to the projection of the rear end edge.
  • Nearby we mean at a distance less than or equal to 10 mm.
  • the reflecting surface 72 is extended by the flat cutting surface 71 which extends along a main extension plane from the collector 7 towards the projection lens 3, that is to say opposite the edge rear end 73.
  • the flat cutting surface 71 extends mainly in a plane inclined with respect to a plane extending longitudinally and transversely, that is to say with respect to a plane extending along the axis L and the axis T and in relation, here, to a plane of the support 2, the inclination of the flat cutting surface being such that the free end, or front edge 77, of this flat cutting surface 71, opposite to the associated reflective surface is the part of the flat optical surface closest to the support 2.
  • the light module comprises an obstructing element 13, integral with the support 2 and projecting from the support 2 towards the collector 7.
  • This obstructing element 13 makes it possible to block part of the light rays emitted by the light source 6 and it also allows the printed circuit board to be correctly positioned relative to the support 2, by matching a light present in the printed circuit board with this obstructing element.
  • the obstructing element 13 has the effect of blocking the most grazing light rays emitted by the light source, and the flat cutting surface 71 extends longitudinally so that the front edge 77 can block the light rays emitted by the light source.
  • light source 6 which have not been blocked by the obstructing element 13 and which have not been reflected by the collector 7.
  • the position of this front edge 77 is thus determined to block almost all of the directed rays towards the lens emanating directly from the light source.
  • part of the flat cutting surface 71 can be on the path of propagation of light rays emitted by the light source 6 and deflected by the reflective surface 72 towards the projection lens 3.
  • An example of such light rays is in particular represented in mixed lines on the .
  • the flat cut-off surface 71 comprises, according to the invention, a local deformation 74 forming a zone of deflection of the light rays emitted by the light source 6 and deflected by the reflecting surface 72.
  • This local deformation 74 makes it possible to deflect a part, see a majority or all of the light rays which reach it at a distance from the projection lens 3, and in particular, in the direction of an absorption or deflection surface distinct from the projection lens.
  • the absorption or deflection surface is arranged directly opposite the flat cutting surface 71, on the support 2.
  • some are for example deflected towards an absorption or deflection surface 78 which is formed by a casing element of the subassembly S2.
  • These light rays pass in particular through an opening 23 of the support 2 in order to reach the absorption or deflection surface 78.
  • the absorption or deflection surface 78 is configured to deflect the light rays emitted by the light source 6 towards a portion of the light module 1 distinct from the projection lens 3, and capable of absorbing, or at all less deflect light rays away from the projection lens.
  • the absorption or deflection surface 78 is formed facing the flat cut-off surface 71, for example, by a surface comprising a coating capable of absorbing at least in part the light rays, or else, by a flat surface comprising prisms making it possible to deflect the light rays towards a portion of the light module 1 distinct from the projection lens 3.
  • the absorption or deflection surface 78 such as for example the printed circuit board 5.
  • These other elements also constitute an absorption or deflection surface, and make it possible to deflect the light rays emitted by the light source 6 towards a portion of the light module 1, distinct from the projection lens 3, and capable of absorbing, or to at the very least to deflect the light rays, away from the projection lens.
  • the light rays which are deflected by the local deformation 74 can undergo several reflections on elements of the light module forming an absorption or deflection surface. Part of the light rays is then absorbed with each reflection, so that the intensity of these light rays decreases significantly. These light rays can thus end up being completely absorbed by the light module 1, or if they reach the projection lens 3 after these multiple reflections, their intensity is sufficiently low not to interfere with the formation of the regulatory lighting function, and in particular that of low beam headlights.
  • the local deformation 74 is produced by a cavity when looking at the internal face of the flat cutting surface 71 facing the support 2, that is to say by a depression of the flat optical surface 71 in an opposite direction to support 2.
  • The represents a low-angle view of the collector 7 revealing the reflective surface 72 and the face of the flat cut-off surface 71 which is turned towards the inside of the light module and which is intended to be impacted by the light rays.
  • the local deformation 74 takes the form of a cavity formed in the planar cutting surface.
  • the local deformation is a relief which tends to move away from the interior of the light module. Local deformation 74 is thus formed by a cavity.
  • the local deformation 74 is configured so that the majority, preferably all of the light rays 102 emitted by the light source 6 and reaching the local deformation 74 after deflection by the reflecting surface 72 are deflected by an angle greater than or equal to 60° . It can be observed that the light rays 102 reaching the local deformation arrive in a first direction on the local deformation 74, and are returned, after deflection by the local deformation 74, in a second direction. The angle of deviation is the angle formed between these first and second directions. It can be observed on the that for the two light rays 102 traced, the angle of deviation is even greater than 90°.
  • the local deformation 74 is configured, in shape and dimensions, to direct a part, preferably at least the majority, of the light rays 102 emitted by the light source 6 and reaching the local deformation 74 after deflection by the reflecting surface 72 , at a distance from the projection lens 3.
  • At least 85% of the light rays emitted by the light source 6 and reaching the local deformation 74 after deflection by the reflective surface 72 are deflected towards a portion of the light module 1 distinct from the projection lens 3.
  • the cavity forming the local deformation 74 has an oblong shape extending in length along a first axis of elongation 76. It should be noted that the first axis of elongation 76 is, advantageously, substantially parallel to the optical axis of the light rays generated by the light source 6 associated with the collector 7 comprising this local deformation 74.
  • the local deformation 74 extends in length over at least 10 mm and more particularly between 10 mm and 17 mm and in width over at least 5 mm and more particularly between 5 mm and 10 mm.
  • the hollow forming the local deformation 74 extends in a direction of depression perpendicular to the main plane of extension of the flat cutting surface over 2 mm.
  • the cavity of the local deformation 74 is delimited by a peripheral edge 75 forming a smooth transition between the flat optical surface 71 and the local deformation 74. It is understood that the peripheral edge 75 makes it possible to form a junction without sharp edges between the cavity and the flat optical surface 71. More particularly, in the embodiment shown, the peripheral edge 75 is formed by a rounding.
  • the local deformation 74 may present a surface whose roughness is different from that of the rest of the flat cutting surface 71. More particularly, the peripheral edge 75 can serve as a demarcation between a smooth surface on almost the entire cutting surface. plane and a diffusing surface corresponding to the surface of the local deformation 74.
  • This diffusing surface may in particular comprise a plurality of reliefs forming a graining. This graining makes it possible in particular to disperse the parasitic rays and to ensure that if certain parasitic rays should however be deflected towards the projection lens, they are isolated and do not generate a problem of homogeneity of the lighting beam brought to be projected by the projection lens.
  • the local deformation 74 may present a surface whose roughness is identical to that of the rest of the planar cut-off surface 71.
  • the planar cut-off surface may present a smooth surface, and the surface of the local deformation 74 may also be smooth. This makes it possible to avoid providing a part to form the graining of the local deformation in the mold.
  • the allows the representation of a partial trace of the light rays emitted by the light source 6, some of which are deflected by the local deformation 74 towards an absorption or deflection surface 78.
  • the light source 6 emits light rays whose first light rays 101 and the second light rays 102.
  • the first light rays 101 are collected by the reflective surface 72 and are reflected in the direction of the projection lens 3 and, more precisely, directly reach said projection lens 3.
  • the second rays light 102 are, like the first light rays 101, collected by the reflecting surface 72 and reflected in the direction of the projection lens 3.
  • This absorption or deflection surface 78 here comprises a plurality of prisms 91 capable of deflecting the second light rays 102 towards a portion of the light module 1 distinct from the projection lens 3.
  • the present invention fulfills the aims which it has set itself, namely to propose a light module in which a collector is associated with a flat cutting surface to limit the propagation of rays emanating directly from a light source, and in which the flat cutting surface is configured to limit the parasitic rays that they can generate by deflecting light rays emitted by this light source and previously deflected by a reflective surface from which it is sought to project the image through a projection lens.
  • the present invention cannot, however, be limited to the means and configurations described and illustrated here and it also extends to any equivalent means and configuration as well as to any technically effective combination of such means, since it allows, by a deformation of the flat cutting surface to deflect possible parasitic light rays towards a portion of the light module distinct from the projection lens.

Abstract

The present invention relates to a light module (1) for a vehicle lighting device, comprising at least one light source (6) which is capable of emitting light rays to form a lighting beam, the light module (1) comprising a collector (7) having a reflecting surface (72) which is intended to collect and reflect at least part of the light rays emitted by the light source (6) towards a projection lens (3) of the light module (1), characterised in that the light module (1) comprises a flat optical surface (71) which extends the reflecting surface (72) of the collector (7), the flat optical surface (71) comprising a local deformation (74) which forms a zone for deflecting the light rays emitted by the light source (6).

Description

Module lumineux pour véhicule automobile.Light module for motor vehicle.
La présente invention concerne le domaine des dispositifs d’éclairage embarqués dans un véhicule automobile.The present invention relates to the field of lighting devices embedded in a motor vehicle.
Le domaine de l’éclairage des véhicules automobiles est soumis à une réglementation qui impose que le système d’éclairage de chaque véhicule automobile soit apte à projeter des faisceaux lumineux remplissant des fonctions d’éclairage respectant des normes spécifiques de sécurité, et notamment une fonction d’éclairage de type feux de route et une fonction d’éclairage de type feux de croisement. La fonction d’éclairage de type feux de croisement permet à un véhicule automobile d’être vu des autres usagers et à son conducteur de voir convenablement la chaussée jusqu’à 30 mètres, sans éblouir les usagers présents sur la route. La fonction de feux de route émet des faisceaux lumineux avec une portée plus longue, pour que le conducteur du véhicule automobile puisse voir convenablement la chaussée, à au moins 200 mètres, notamment en conditions nocturnes.The field of lighting of motor vehicles is subject to regulations which require that the lighting system of each motor vehicle be capable of projecting light beams fulfilling lighting functions respecting specific safety standards, and in particular a function high beam type lighting function and a low beam type lighting function. The low beam type lighting function allows a motor vehicle to be seen by other users and its driver to properly see the roadway up to 30 meters away, without dazzling users on the road. The high beam function emits light beams with a longer range, so that the driver of the motor vehicle can clearly see the roadway, at least 200 meters away, particularly in nighttime conditions.
Ces feux de croisement et de route peuvent être mis en œuvre par des modules lumineux, qui sont intégrés dans des dispositifs lumineux disposés en face avant des véhicules automobiles. De tels modules lumineux comprennent notamment une source lumineuse, un élément optique comportant une surface réfléchissante, et une lentille de projection. These low beam and high beam lights can be implemented by light modules, which are integrated into light devices arranged on the front of motor vehicles. Such light modules include in particular a light source, an optical element comprising a reflective surface, and a projection lens.
La source lumineuse peut par exemple prendre la forme de diodes électroluminescentes, implantées sur au moins une carte de circuit imprimé, qui est généralement disposée sur un support tel qu’un radiateur intégré au module lumineux.The light source can for example take the form of light-emitting diodes, installed on at least one printed circuit board, which is generally placed on a support such as a radiator integrated into the light module.
La source lumineuse, qui émet une pluralité de rayons lumineux de façon omnidirectionnelle, et l’élément optique sont disposés l’un par rapport à l’autre pour que l’élément optique puisse collecter et/ou réfléchir les rayons lumineux émis par les diodes électroluminescentes afin de former un faisceau et l’orienter vers la lentille de projection selon une distribution prédéterminée.The light source, which emits a plurality of light rays omnidirectionally, and the optical element are arranged relative to each other so that the optical element can collect and/or reflect the light rays emitted by the diodes electroluminescent in order to form a beam and direct it towards the projection lens according to a predetermined distribution.
Dans les modules lumineux destinés à générer un faisceau de feux de croisement, il est connu de prolonger l’élément optique par une surface de coupure plane ayant notamment pour rôle de couper les rayons lumineux émis par la source lumineuse et les empêcher de se propager en sortie du module lumineux. Le module lumineux est configuré pour que les rayons lumineux qui rencontrent cette surface de coupure en émanant directement de la source lumineuse soient bloqués dans le module lumineux. Cependant, certains des rayons lumineux émis depuis la source lumineuse et réfléchis par l’élément optique peuvent rencontrer la surface de coupure plane avec un angle d’incidence tel qu’ils sont dirigés vers la lentille de projection et forment des rayons lumineux parasites. Ces rayons lumineux parasites peuvent augmenter localement l’intensité lumineuse des faisceaux lumineux formant la fonction de feux de croisement, et ce manque d’homogénéité du faisceau de feux de croisement peut provoquer une gêne pour l’utilisateur du véhicule ou des usagers de la route venant, par exemple, en sens inverse.In light modules intended to generate a low beam beam, it is known to extend the optical element with a flat cutting surface having in particular the role of cutting the light rays emitted by the light source and preventing them from propagating in output of the light module. The light module is configured so that light rays which encounter this cutoff surface emanating directly from the light source are blocked in the light module. However, some of the light rays emitted from the light source and reflected by the optical element may encounter the planar cutting surface with an angle of incidence such that they are directed towards the projection lens and form stray light rays. These parasitic light rays can locally increase the light intensity of the light beams forming the low beam function, and this lack of homogeneity of the low beam beam can cause discomfort for the user of the vehicle or road users. coming, for example, in the opposite direction.
La présente invention vise à pallier les inconvénients de l’art antérieur, notamment en proposant un module lumineux apte à couper les faisceaux lumineux conformément aux réglementations en vigueur et à limiter le nombre de rayons lumineux parasites atteignant la lentille de projection.The present invention aims to overcome the drawbacks of the prior art, in particular by proposing a light module capable of cutting the light beams in accordance with the regulations in force and of limiting the number of parasitic light rays reaching the projection lens.
Dans ce contexte, la présente invention a pour principal objet un module lumineux pour dispositif d’éclairage d’un véhicule, comprenant au moins une source lumineuse apte à émettre des rayons lumineux et un collecteur comportant une surface réfléchissante destinée à collecter et à réfléchir au moins une partie des rayons lumineux émis par ladite source lumineuse en direction d’une lentille de projection du module lumineux pour former un faisceau d’éclairage, caractérisé en ce qu’il comprend une surface de coupure plane prolongeant la surface réfléchissante du collecteur en direction de la lentille de projection, la surface de coupure plane comportant une déformation locale formant une zone de déviation des rayons lumineux déviés par la surface réfléchissante du collecteur.In this context, the main object of the present invention is a light module for a lighting device of a vehicle, comprising at least one light source capable of emitting light rays and a collector comprising a reflective surface intended to collect and reflect the less a part of the light rays emitted by said light source in the direction of a projection lens of the light module to form a lighting beam, characterized in that it comprises a flat cutting surface extending the reflective surface of the collector in the direction of the projection lens, the planar cutting surface comprising a local deformation forming a deflection zone of the light rays deflected by the reflecting surface of the collector.
Un tel module lumineux, avec au moins une source lumineuse dont les rayons lumineux sont réfléchis par une surface réfléchissante en direction de la lentille de projection et une surface de coupure plane, permet de générer un faisceau d’éclairage focalisé et avec un bord de coupure pour réaliser une fonction d’éclairage de type « feux de croisement ». La surface optique plane s’étendant depuis la surface réfléchissante en direction de la lentille de projection est configurée pour générer le bord de coupure dudit faisceau d’éclairage. En d’autres termes, la surface optique plane permet de limiter la hauteur du faisceau lumineux en sortie du module lumineux afin de ne pas éblouir les usagers de la route lorsque le véhicule circule avec le mode d’éclairage « feux de croisement ». Such a light module, with at least one light source whose light rays are reflected by a reflective surface in the direction of the projection lens and a planar cut-off surface, makes it possible to generate a focused lighting beam with a cut-off edge to perform a “low beam” type lighting function. The planar optical surface extending from the reflective surface towards the projection lens is configured to generate the cutoff edge of said illumination beam. In other words, the flat optical surface makes it possible to limit the height of the light beam leaving the light module so as not to dazzle road users when the vehicle is traveling with the "low beam" lighting mode.
La surface de coupure est dimensionnée et orientée par rapport à la surface réfléchissante pour bloquer une partie des rayons émis par la source lumineuse et éviter qu’ils n’atteignent la lentille de projection notamment en les déviant vers une zone où ils sont absorbés ou déviés à distance de la lentille de projection. The cut-off surface is sized and oriented relative to the reflecting surface to block part of the rays emitted by the light source and prevent them from reaching the projection lens, in particular by deflecting them towards a zone where they are absorbed or deflected away from the projection lens.
Selon l’invention, la surface de coupure plane est configurée pour comporter localement une déformation locale, c’est-à-dire en d’autres termes une cavité, formant une zone de déviation locale de certains des rayons lumineux émis par la source lumineuse et déviés par la surface réfléchissante. Cette déformation locale permet de dévier les rayons lumineux en direction d’une portion du module lumineux qui est distincte de la lentille de projection.According to the invention, the planar cutting surface is configured to locally include a local deformation, that is to say in other words a cavity, forming a zone of local deviation of certain of the light rays emitted by the light source and deflected by the reflecting surface. This local deformation makes it possible to deflect the light rays towards a portion of the light module which is distinct from the projection lens.
On peut ainsi limiter la propagation de rayons lumineux parasites en direction de la lentille de projection, ces rayons lumineux parasites étant les rayons qui sont émis par la source lumineuse et déviés par le collecteur en direction d’une zone spécifique de la surface optique de coupure.It is thus possible to limit the propagation of parasitic light rays in the direction of the projection lens, these parasitic light rays being the rays which are emitted by the light source and deflected by the collector towards a specific zone of the optical cut-off surface .
Selon une caractéristique de l’invention, la déformation locale est délimitée par un bord périphérique formé par un arrondi. La délimitation de la déformation locale par un bord périphérique formée par un arrondi, et non par un bord net, permet de contrôler l’homogénéité de propagation des rayons lumineux déviés par la déformation locale. According to one characteristic of the invention, the local deformation is delimited by a peripheral edge formed by a rounding. The delimitation of the local deformation by a peripheral edge formed by a rounding, and not by a sharp edge, makes it possible to control the homogeneity of propagation of the light rays deviated by the local deformation.
Selon une autre caractéristique de l’invention, la déformation locale comprend sur au moins une partie de sa surface une surface diffusante. Cette surface diffusante de la cavité formant la déformation locale permet de rendre diffus et dévier efficacement les rayons lumineux atteignant la déformation locale. La surface diffusante peut notamment présenter une pluralité de reliefs formant une succession de saillies et de creux. Les reliefs de la surface diffusante peuvent être obtenues, par exemple, par un procédé de grainage de la surface diffusante. According to another characteristic of the invention, the local deformation comprises a diffusing surface on at least part of its surface. This diffusing surface of the cavity forming the local deformation makes it possible to diffuse and effectively deflect the light rays reaching the local deformation. The diffusing surface may in particular have a plurality of reliefs forming a succession of projections and hollows. The reliefs of the diffusing surface can be obtained, for example, by a process of graining the diffusing surface.
Selon une caractéristique de l’invention, la majorité, de préférence la totalité, des rayons lumineux atteignant la déformation locale sont déviés d’un angle supérieur ou égal à 60°. Pour chaque rayon lumineux atteignant la déformation locale, cet angle de déviation est mesuré entre la direction du rayon lumineux avant qu’il n’atteigne la déformation locale et la direction du rayon lumineux après déviation par la déformation locale. According to one characteristic of the invention, the majority, preferably all, of the light rays reaching the local deformation are deflected by an angle greater than or equal to 60°. For each light ray reaching the local deformation, this deviation angle is measured between the direction of the light ray before it reaches the local deformation and the direction of the light ray after deflection by the local deformation.
Selon une caractéristique de l’invention, la déformation locale est configurée pour diriger une partie, de préférence la majorité, des rayons lumineux atteignant la déformation locale à distance de la lentille de projection.According to one characteristic of the invention, the local deformation is configured to direct a part, preferably the majority, of the light rays reaching the local deformation away from the projection lens.
Selon une caractéristique de l’invention, la déformation locale est configurée pour diriger au moins 85% des rayons lumineux atteignant la déformation locale à distance de la lentille de projection. Ce taux de rayons lumineux déviés en direction d’une portion du module lumineux distincte de la lentille de projection est avantageusement obtenu par les dimensions, l’état de surface ainsi que la position sur la surface de coupure plane de la déformation locale.According to one characteristic of the invention, the local deformation is configured to direct at least 85% of the light rays reaching the local deformation away from the projection lens. This rate of light rays deflected towards a portion of the light module distinct from the projection lens is advantageously obtained by the dimensions, the surface condition as well as the position on the plane cut-off surface of the local deformation.
Selon une autre caractéristique de l’invention, au moins une partie des rayons lumineux atteignant la déformation locale est déviée en direction d’une surface d’absorption ou de déviation disposée en regard de la surface de coupure plane. La surface d’absorption ou de déviation peut comprendre des reliefs tels que des prismes, pour dévier les rayons lumineux déviés par la déformation locale, ou comprendre un revêtement configuré pour absorber les rayons lumineux déviés par la déformation locale. En d’autres termes, la surface de déviation est configurée pour absorber ou dévier les rayons lumineux vers une portion du module lumineux différente de la lentille de projection.According to another characteristic of the invention, at least part of the light rays reaching the local deformation are deflected in the direction of an absorption or deflection surface arranged opposite the planar cut-off surface. The absorption or deflection surface may include reliefs such as prisms, to deflect the light rays deviated by the local deformation, or include a coating configured to absorb the light rays deviated by the local deformation. In other words, the deflection surface is configured to absorb or deflect the light rays towards a portion of the light module different from the projection lens.
Selon une caractéristique de l’invention, la déformation locale présente une forme oblongue dont l’axe principal d’allongement est dirigé vers la lentille de projection.According to one characteristic of the invention, the local deformation has an oblong shape whose main axis of elongation is directed towards the projection lens.
Selon une autre caractéristique de l’invention, la déformation locale présente une dimension, le long de l’axe d’allongement principal, d’au moins 10 mm.According to another characteristic of the invention, the local deformation has a dimension, along the main axis of elongation, of at least 10 mm.
Selon une caractéristique de l’invention, la source lumineuse est configurée pour former un faisceau d’éclairage selon un axe optique, l’axe d’allongement principal et l’axe optique étant sensiblement parallèles.According to one characteristic of the invention, the light source is configured to form a lighting beam along an optical axis, the main elongation axis and the optical axis being substantially parallel.
Selon une autre caractéristique de l’invention, la lentille de projection est configurée pour qu’un foyer de la lentille de projection soit disposé au niveau d’un bord d’extrémité arrière du collecteur, à l’opposé de la surface de coupure plane. De la sorte, la lentille de projection est configurée pour former une image de la surface réfléchissante du collecteur.According to another characteristic of the invention, the projection lens is configured so that a focus of the projection lens is arranged at a rear end edge of the collector, opposite the flat cutting surface . In this way, the projection lens is configured to form an image of the reflective surface of the collector.
Selon une caractéristique de l’invention, la déformation locale s’étend selon une direction d’enfoncement perpendiculaire au plan d’extension principal sur au moins 2 mm.According to one characteristic of the invention, the local deformation extends in a direction of depression perpendicular to the main plane of extension for at least 2 mm.
Selon une autre caractéristique de l’invention, la source lumineuse, la surface réfléchissante, la surface de coupure plane et la lentille de projection sont configurées et agencées les unes par rapport aux autres pour générer un faisceau d’éclairage à coupure. En d’autres termes, le module lumineux selon l’invention est prévu pour réaliser la fonction d’éclairage de type « feux de croisement » du véhicule automobile.According to another characteristic of the invention, the light source, the reflecting surface, the planar cut-off surface and the projection lens are configured and arranged relative to each other to generate a cut-off lighting beam. In other words, the light module according to the invention is intended to perform the “low beam” type lighting function of the motor vehicle.
D’autres caractéristiques, détails et avantages de l’invention ressortiront plus clairement à la lecture de la description qui suit d’une part, et de plusieurs exemples de réalisation donnés à titre indicatif et non limitatif en référence aux dessins schématiques annexés d’autre part, sur lesquels :Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and several examples of embodiment given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand. share, on which:
représente en perspective une vue générale d’un module lumineux selon un mode de réalisation de l’invention ; represents in perspective a general view of a light module according to one embodiment of the invention;
représente une vue de coupe du module lumineux rendant notamment visible l’intérieur du sous-ensemble générant la fonction d’éclairage « feux de croisement » ; represents a sectional view of the light module making visible in particular the interior of the sub-assembly generating the “low beam” lighting function;
représente une vue de dessous du collecteur du sous-ensemble générant la fonction d’éclairage « feux de croisement » laissant apercevoir une déformation locale dans une surface de coupure plane ; represents a bottom view of the collector of the subassembly generating the “low beam” lighting function revealing a local deformation in a flat cut-off surface;
est une représentation schématique du sous-ensemble générant la fonction d’éclairage « feux de croisement » dans laquelle sont rendus visibles des rayons lumineux émis par une source lumineuse et déviés par une surface réfléchissante, certains de ces rayons étant déviés par la déformation locale. is a schematic representation of the subassembly generating the “low beam” lighting function in which light rays emitted by a light source and deflected by a reflective surface are made visible, some of these rays being deflected by local deformation.
Les caractéristiques, variantes et les différentes formes de réalisation de l’invention peuvent être associées les unes avec les autres, selon diverses combinaisons, dans la mesure où elles ne sont pas incompatibles ou exclusives les unes par rapport aux autres. On pourra notamment imaginer des variantes de l’invention ne comprenant qu’une sélection de caractéristiques décrites par la suite de manière isolée des autres caractéristiques décrites, si cette sélection de caractéristiques est suffisante pour conférer un avantage technique et/ou pour différencier l’invention par rapport à l’état de la technique antérieur.The characteristics, variants and different embodiments of the invention can be associated with each other, in various combinations, to the extent that they are not incompatible or exclusive with respect to each other. In particular, it will be possible to imagine variants of the invention comprising only a selection of characteristics described subsequently in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage and/or to differentiate the invention. compared to the prior art.
Sur les figures, les éléments communs à plusieurs figures conservent la même référence.In the figures, elements common to several figures retain the same reference.
Dans la description détaillée qui va suivre, les dénominations « longitudinale », « transversale » et « verticale » se réfèrent à l’orientation du module lumineux selon l’invention, avec notamment une direction longitudinale qui correspond à une direction principale d’émission des rayons lumineux en sortie de ce module lumineux, cette direction longitudinale étant parallèle à un axe longitudinal L d’un repère L, V, T illustré sur les figures. Une direction verticale et une direction transversale correspondent respectivement à des directions parallèles à un axe vertical V et un axe transversal T du repère L, V, T.In the detailed description which follows, the designations "longitudinal", "transverse" and "vertical" refer to the orientation of the light module according to the invention, with in particular a longitudinal direction which corresponds to a main direction of emission of the light rays exiting this light module, this longitudinal direction being parallel to a longitudinal axis L of a mark L, V, T illustrated in the figures. A vertical direction and a transverse direction correspond respectively to directions parallel to a vertical axis V and a transverse axis T of the reference frame L, V, T.
Les figures 1 et 2 représentent respectivement une vue générale d’un module lumineux 1 et une vue de coupe dudit module lumineux 1 selon le plan de coupe A-A visible sur la . Le module lumineux 1 s’étend selon une direction d’allongement principal longitudinale, sensiblement parallèle à l’axe L, et qui correspond à la direction d’allongement du véhicule automobile qu’il est destiné à équiper. Le module lumineux 1 est, dans les modes de réalisation représentés, un module lumineux apte à générer une première fonction d’éclairage selon un mode d’éclairage « feux de croisement » générée par un premier sous-ensemble S1 du module lumineux 1, et une deuxième fonction d’éclairage selon un mode d’éclairage « feux de route » générée par un deuxième sous-ensemble S2 du module lumineux 1. On comprend que le module lumineux 1 est ici un module à double fonction lumineuse, c’est-à-dire un module comportant un support 2 de part et d’autre duquel sont disposés deux sous-ensembles S1, S2 configurés pour émettre des faisceaux lumineux différents l’un et l’autre. Figures 1 and 2 respectively represent a general view of a light module 1 and a sectional view of said light module 1 according to the section plane AA visible on the . The light module 1 extends in a direction of main longitudinal elongation, substantially parallel to the axis L, and which corresponds to the direction of elongation of the motor vehicle that it is intended to equip. The light module 1 is, in the embodiments shown, a light module capable of generating a first lighting function according to a “low beam” lighting mode generated by a first subassembly S1 of the light module 1, and a second lighting function according to a “high beam” lighting mode generated by a second sub-assembly S2 of the light module 1. We understand that the light module 1 is here a module with dual light function, that is that is to say a module comprising a support 2 on either side of which are arranged two subassemblies S1, S2 configured to emit light beams that are different from each other.
L’invention consiste notamment, tel que cela va être décrit ci-après, à prévoir une zone de déviation de rayons lumineux parasites sur une surface de coupure prolongeant une surface réfléchissante, dans une partie d’un module lumineux destiné à générer une première fonction d’éclairage selon un mode d’éclairage « feux de croisement », et ce, que le module lumineux comporte ou non deux sous-ensembles avec un deuxième sous-ensemble apte à générer une deuxième fonction d’éclairage selon un mode d’éclairage « feux de route ».The invention consists in particular, as will be described below, of providing a zone of deflection of parasitic light rays on a cut-off surface extending a reflective surface, in a part of a light module intended to generate a first function lighting according to a “low beam” lighting mode, whether or not the light module comprises two sub-assemblies with a second sub-assembly capable of generating a second lighting function according to a lighting mode " Redlights ".
Le premier sous-ensemble S1, et ici également le deuxième sous-ensemble S2, est configuré pour diriger des rayons lumineux en direction d’une lentille de projection 3 qui participe ici à former les première et deuxième fonctions d’éclairage. Le module lumineux 1 comprend en outre un radiateur 4 configuré pour évacuer les calories générés par le fonctionnement des sources lumineuses du module lumineux 1. The first subassembly S1, and here also the second subassembly S2, is configured to direct light rays towards a projection lens 3 which here participates in forming the first and second lighting functions. The light module 1 further comprises a radiator 4 configured to evacuate the calories generated by the operation of the light sources of the light module 1.
Le radiateur 4 et le support 2 forment ici une pièce commune, d’un seul tenant. Le support 2 forme une surface sensiblement plane s’étendant selon un plan longitudinal et transversal, sensiblement parallèle à l’axe L et à l’axe T. La surface plane du support 2 présente une première face 21 et une deuxième face 22, ces faces 21 et 22 étant opposées selon la direction verticale, sensiblement parallèle à l’axe V. Une zone de réception d’une carte de circuits imprimés de chacun des sous-ensembles S1, S2 est formée sur chacune de ces faces.The radiator 4 and the support 2 here form a common part, in one piece. The support 2 forms a substantially flat surface extending along a longitudinal and transverse plane, substantially parallel to the axis L and to the axis T. The flat surface of the support 2 has a first face 21 and a second face 22, these faces 21 and 22 being opposite in the vertical direction, substantially parallel to the axis V. A zone for receiving a printed circuit board of each of the subassemblies S1, S2 is formed on each of these faces.
Le premier sous-ensemble S1 comporte une carte de circuits imprimés 5, fixée sur la première face 21 du support 2, plusieurs sources lumineuses 6 fixées sur la carte de circuits imprimés 5, dont une est visible sur la vue en coupe de la , et plusieurs collecteurs 7 configurés respectivement pour dévier les rayons lumineux émis par l’une des sources lumineuses en direction de la lentille de projection 3. The first subassembly S1 comprises a printed circuit board 5, fixed on the first face 21 of the support 2, several light sources 6 fixed on the printed circuit board 5, one of which is visible in the sectional view of the , and several collectors 7 configured respectively to deflect the light rays emitted by one of the light sources towards the projection lens 3.
Plus particulièrement, le premier sous-ensemble S1 comporte d’une part un premier ensemble 81 de quatre collecteurs 7 disposés respectivement en regard d’une des sources lumineuses et configurés pour former une partie basse de la fonction d’éclairage « feux de croisement », avec une coupure rectiligne, et notamment une coupure horizontale, et d’autre part un deuxième ensemble 82 et un troisième ensemble 83 de collecteurs, disposés de part et d’autre du premier ensemble 81 et configurés pour former une partie additionnelle de la fonction d’éclairage « feux de croisement » et notamment un profil de coupure particulier, par exemple une coupure horizontale avec un ressaut. Tel que cela est visible sur la , le deuxième ensemble 82 de collecteurs comporte un unique collecteur et le troisième ensemble 83 de collecteurs comporte deux collecteurs disposés respectivement en regard d’une source lumineuse.More particularly, the first subassembly S1 comprises on the one hand a first set 81 of four collectors 7 arranged respectively opposite one of the light sources and configured to form a lower part of the “low beam” lighting function , with a rectilinear cut-off, and in particular a horizontal cut-off, and on the other hand a second set 82 and a third set 83 of collectors, arranged on either side of the first set 81 and configured to form an additional part of the function “low beam” lighting and in particular a particular cut-off profile, for example a horizontal cut-off with a projection. As visible on the , the second set 82 of collectors comprises a single collector and the third set 83 of collectors comprises two collectors arranged respectively facing a light source.
Chacun des ensembles de collecteurs 81, 82, 83 comporte une ou plusieurs surfaces réfléchissantes disposées en regard d’une source lumineuse correspondante et qui sont prolongées en direction de la lentille de projection par une surface de coupure 71, 85 qui participe à bloquer certains des rayons lumineux émis par les sources lumineuses pour donner un aspect règlementaire au faisceau lumineux généré par la lentille de projection après réflexion par cet ensemble de collecteurs.Each of the sets of collectors 81, 82, 83 comprises one or more reflective surfaces arranged facing a corresponding light source and which are extended towards the projection lens by a cut- off surface 71, 85 which helps to block some of the light rays emitted by the light sources to give a regulatory appearance to the light beam generated by the projection lens after reflection by this set of collectors.
On va plus particulièrement décrire par la suite le troisième ensemble 83 de collecteurs, et plus particulièrement encore l’un des collecteurs 7 de ce troisième ensemble 83, dans la mesure où il comporte la zone de déviation de rayons lumineux parasites conforme à l’invention, telle qu’elle a été évoquée précédemment, mais il convient de noter qu’une zone de déviation pourrait sans sortir du contexte de l’invention être mise en œuvre sur chacune des surface de coupure, ou au moins sur plusieurs surfaces de coupure.We will more particularly describe below the third set 83 of collectors, and more particularly still one of the collectors 7 of this third set 83, insofar as it comprises the zone of deviation of parasitic light rays according to the invention , as mentioned previously, but it should be noted that a deviation zone could, without departing from the context of the invention, be implemented on each of the cutting surfaces, or at least on several cutting surfaces.
Le collecteur 7 de ce troisième ensemble 83, à travers lequel passe le plan de coupe A-A, et qui va être par la suite décrit comme le collecteur 7, comporte une surface réfléchissante 72, disposée en regard d’une diode électroluminescente 6, et une surface de coupure plane 71 qui prolonge la surface réfléchissante 72 en direction de la lentille de projection 3. La zone de déviation 74 est formée sur cette surface de coupure plane 71, ici par la réalisation d’une partie bombée à l’opposé de l’intérieur du module lumineux. The collector 7 of this third assembly 83, through which the cutting plane A-A passes, and which will subsequently be described as the collector 7, comprises a reflective surface 72, arranged opposite a light-emitting diode 6, and a flat cutting surface 71 which extends the reflective surface 72 in the direction of the projection lens 3. The deflection zone 74 is formed on this flat cutting surface 71, here by the production of a convex part opposite the inside the light module.
Tel que visible sur les figures 2 et 4, la surface réfléchissante 72 forme une face interne du collecteur, tournée vers l’intérieur du module lumineux et notamment vers une source lumineuse 6, et cette surface réfléchissante 72 est configurée de telle sorte que les rayons lumineux émis de façon omnidirectionnelle par ladite source lumineuse 6 sont réfléchis sur la surface réfléchissante 72 en direction de la lentille de projection 3. A cet effet, la surface réfléchissante 72 du collecteur 7 peut présenter, en section dans un plan passant par la source lumineuse et comprenant l’axe longitudinal L, une forme elliptique ou parabolique, avec la source lumineuse 6 qui est disposée au voisinage d’un foyer de cette surface réfléchissante pour que le collecteur puisse collecter les rayons lumineux émis par la source lumineuse 6 et les réfléchir en direction de la lentille de projection 3. As visible in Figures 2 and 4, the reflective surface 72 forms an internal face of the collector, facing towards the interior of the light module and in particular towards a light source 6, and this reflective surface 72 is configured such that the rays light emitted omnidirectionally by said light source 6 are reflected on the reflective surface 72 in the direction of the projection lens 3. For this purpose, the reflecting surface 72 of the collector 7 can have, in section in a plane passing through the light source and comprising the longitudinal axis L, an elliptical or parabolic shape, with the light source 6 which is arranged in the vicinity of a focus of this reflective surface so that the collector can collect the light rays emitted by the light source 6 and reflect them towards the projection lens 3.
La surface réfléchissante 72 présente un bord d’extrémité arrière 73, disposée à l’opposé de la lentille de projection 3. Le module lumineux peut être configuré de sorte que cette lentille de projection 3 présente un foyer objet qui est sensiblement au voisinage du bord d’extrémité arrière 73, et cette lentille de projection est ainsi configurée pour former une image de la surface réfléchissante 72 du collecteur 7, avec un bord de l’image très net correspondant à la projection du bord d’extrémité arrière. Par « au voisinage », on entend à une distance inférieure ou égale à 10 mm.The reflective surface 72 has a rear end edge 73, arranged opposite the projection lens 3. The light module can be configured so that this projection lens 3 has an object focus which is substantially in the vicinity of the edge rear end edge 73, and this projection lens is thus configured to form an image of the reflective surface 72 of the collector 7, with a very sharp edge of the image corresponding to the projection of the rear end edge. By “nearby” we mean at a distance less than or equal to 10 mm.
Le surface réfléchissante 72 est prolongée par la surface de coupure plane 71 qui s’étend selon un plan d’extension principal depuis le collecteur 7 en direction de la lentille de projection 3, c’est-à-dire à l’opposé du bord d’extrémité arrière 73. Tel que cela est notamment visible sur la , la surface de coupure plane 71 s’étend principalement dans un plan incliné par rapport à un plan s’étendant longitudinalement et transversalement, c’est-à-dire par rapport à un plan s’étendant selon l’axe L et l’axe T et par rapport, ici, à un plan du support 2, l’inclinaison de la surface de coupure plane étant telle que l’extrémité libre, ou bord avant 77, de cette surface de coupure plane 71, à l’opposé de la surface réfléchissante associée est la partie de la surface optique plane la plus proche du support 2. The reflecting surface 72 is extended by the flat cutting surface 71 which extends along a main extension plane from the collector 7 towards the projection lens 3, that is to say opposite the edge rear end 73. As is particularly visible on the , the flat cutting surface 71 extends mainly in a plane inclined with respect to a plane extending longitudinally and transversely, that is to say with respect to a plane extending along the axis L and the axis T and in relation, here, to a plane of the support 2, the inclination of the flat cutting surface being such that the free end, or front edge 77, of this flat cutting surface 71, opposite to the associated reflective surface is the part of the flat optical surface closest to the support 2.
La vue en coupe de la rend visible que le module lumineux comporte un élément d’obstruction 13, solidaire du support 2 et faisant saillie depuis le support 2 vers le collecteur 7. Cet élément d’obstruction 13 permet de bloquer une partie des rayons lumineux émis par la source lumineuse 6 et il permet en outre de positionner correctement la carte de circuit imprimé par rapport au support 2, en faisant correspondre une lumière présente dans la carte de circuit imprimé avec cet élément d’obstruction.The sectional view of the makes it visible that the light module comprises an obstructing element 13, integral with the support 2 and projecting from the support 2 towards the collector 7. This obstructing element 13 makes it possible to block part of the light rays emitted by the light source 6 and it also allows the printed circuit board to be correctly positioned relative to the support 2, by matching a light present in the printed circuit board with this obstructing element.
L’élément d’obstruction 13 a pour effet de bloquer les rayons lumineux émis par la source lumineuse les plus rasants, et la surface de coupure plane 71 s’étend longitudinalement de sorte que le bord avant 77 puisse bloquer les rayons lumineux émis par la source lumineuse 6 qui n’ont pas été bloqués par l’élément d’obstruction 13 et qui n’ont pas été réfléchis par le collecteur 7. La position de ce bord avant 77 est ainsi déterminée pour bloquer quasiment l’intégralité des rayons dirigés vers la lentille émanant directement de la source lumineuse.The obstructing element 13 has the effect of blocking the most grazing light rays emitted by the light source, and the flat cutting surface 71 extends longitudinally so that the front edge 77 can block the light rays emitted by the light source. light source 6 which have not been blocked by the obstructing element 13 and which have not been reflected by the collector 7. The position of this front edge 77 is thus determined to block almost all of the directed rays towards the lens emanating directly from the light source.
Il résulte de cette position de la surface optique plane 71, et de la position de son bord avant 77, qu’une partie de la surface de coupure plane 71 peut être sur le trajet de propagation de rayons lumineux émis par la source lumineuse 6 et déviés par la surface réfléchissante 72 en direction de la lentille de projection 3. Un exemple de tels rayons lumineux est notamment représenté en traits mixtes sur la . It results from this position of the flat optical surface 71, and from the position of its front edge 77, that part of the flat cutting surface 71 can be on the path of propagation of light rays emitted by the light source 6 and deflected by the reflective surface 72 towards the projection lens 3. An example of such light rays is in particular represented in mixed lines on the .
Afin d’éviter que ces rayons lumineux arrivent avec un angle d’incidence sur la surface de coupure plane tel que ces rayons lumineux restent dirigés vers la lentille de projection mais dans une zone non souhaitée pour la formation d’un faisceau d’éclairage règlementaire, la surface de coupure plane 71 comporte, selon l’invention, une déformation locale 74 formant une zone de déviation des rayons lumineux émis par la source lumineuse 6 et déviés par la surface réfléchissante 72. Cette déformation locale 74 permet de dévier une partie, voir une majorité ou la totalité des rayons lumineux qui l’atteignent à distance de la lentille de projection 3, et en particulier, en direction d’une surface d’absorption ou de déviation distincte de la lentille de projection. Dans la représentation schématique de la , la surface d’absorption ou de déviation est disposée directement en regard de la surface de coupure plane 71, sur le support 2. Dans le mode de réalisation représenté par la , parmi les rayons lumineux émis par la source lumineuse 6 et atteignant la déformation locale 74, certains sont par exemple déviés en direction d’une surface d’absorption ou de déviation 78 qui est formée par un élément de carter du sous-ensemble S2. Ces rayons lumineux passent notamment par une ouverture 23 du support 2 afin d’atteindre la surface d’absorption ou de déviation 78.In order to prevent these light rays arriving with an angle of incidence on the flat cutting surface such that these light rays remain directed towards the projection lens but in an area not desired for the formation of a regulatory lighting beam , the flat cut-off surface 71 comprises, according to the invention, a local deformation 74 forming a zone of deflection of the light rays emitted by the light source 6 and deflected by the reflecting surface 72. This local deformation 74 makes it possible to deflect a part, see a majority or all of the light rays which reach it at a distance from the projection lens 3, and in particular, in the direction of an absorption or deflection surface distinct from the projection lens. In the schematic representation of the , the absorption or deflection surface is arranged directly opposite the flat cutting surface 71, on the support 2. In the embodiment represented by the , among the light rays emitted by the light source 6 and reaching the local deformation 74, some are for example deflected towards an absorption or deflection surface 78 which is formed by a casing element of the subassembly S2. These light rays pass in particular through an opening 23 of the support 2 in order to reach the absorption or deflection surface 78.
On comprend que la surface d’absorption ou de déviation 78 est configurée pour dévier les rayons lumineux émis par la source lumineuse 6 vers une portion du module lumineux 1 distincte de la lentille de projection 3, et susceptible d’absorber, ou à tout le moins de dévier, les rayons lumineux à distance de la lentille de projection. It is understood that the absorption or deflection surface 78 is configured to deflect the light rays emitted by the light source 6 towards a portion of the light module 1 distinct from the projection lens 3, and capable of absorbing, or at all less deflect light rays away from the projection lens.
La surface d’absorption ou de déviation 78, est formée en regard de la surface de coupure plane 71, par exemple, par une surface comprenant un revêtement apte à absorber au moins en partie les rayons lumineux, ou encore, par une surface plane comprenant des prismes permettant de dévier les rayons lumineux vers une portion du module lumineux 1 distincte de la lentille de projection 3.The absorption or deflection surface 78 is formed facing the flat cut-off surface 71, for example, by a surface comprising a coating capable of absorbing at least in part the light rays, or else, by a flat surface comprising prisms making it possible to deflect the light rays towards a portion of the light module 1 distinct from the projection lens 3.
Parmi les rayons lumineux émis par la source lumineuse 6 et atteignant la déformation locale 74, certains sont déviés vers d’autres éléments du module lumineux que la surface d’absorption ou de déviation 78, comme par exemple la carte de circuits imprimés 5. Ces autres éléments constituent également une surface d’absorption ou de déviation, et permettent de dévier les rayons lumineux émis par la source lumineuse 6 vers une portion du module lumineux 1, distincte de la lentille de projection 3, et susceptible d’absorber, ou à tout le moins de dévier les rayons lumineux, à distance de la lentille de projection.Among the light rays emitted by the light source 6 and reaching the local deformation 74, some are deflected towards other elements of the light module than the absorption or deflection surface 78, such as for example the printed circuit board 5. These other elements also constitute an absorption or deflection surface, and make it possible to deflect the light rays emitted by the light source 6 towards a portion of the light module 1, distinct from the projection lens 3, and capable of absorbing, or to at the very least to deflect the light rays, away from the projection lens.
En particulier, les rayons lumineux qui sont déviés par la déformation locale 74 peuvent subir plusieurs réflexions sur des éléments du module lumineux formant une surface d’absorption ou de déviation. Une partie des rayons lumineux est alors absorbée à chaque réflexion, de sorte que l’intensité de ces rayons lumineux diminue significativement. Ces rayons lumineux peuvent ainsi finir par être totalement absorbés par le module lumineux 1, ou s’ils atteignent la lentille de projection 3 après ces multiples réflexions, leur intensité est suffisamment faible pour ne pas gêner la formation de la fonction d’éclairage réglementaire, et notamment celle de feux de croisement.In particular, the light rays which are deflected by the local deformation 74 can undergo several reflections on elements of the light module forming an absorption or deflection surface. Part of the light rays is then absorbed with each reflection, so that the intensity of these light rays decreases significantly. These light rays can thus end up being completely absorbed by the light module 1, or if they reach the projection lens 3 after these multiple reflections, their intensity is sufficiently low not to interfere with the formation of the regulatory lighting function, and in particular that of low beam headlights.
La déformation locale 74 est réalisée par une cavité lorsque l’on regarde la face interne de la surface de coupure plane 71 en regard du support 2, c’est-à-dire par un enfoncement de la surface optique plane 71 dans une direction opposée au support 2. La représente une vue en contre-plongée du collecteur 7 laissant apercevoir la surface réfléchissante 72 et la face de la surface de coupure plane 71 qui est tournée vers l’intérieur du module lumineux et qui est destinée à être impactée par les rayons lumineux. Avec cet angle de vue, la déformation locale 74 prend la forme d’une cavité formée dans la surface de coupure plane. On comprend ainsi, en regardant les figures 1 à 4, que la déformation locale est un relief qui tend à s’éloigner de l’intérieur du module lumineux. La déformation locale 74 est ainsi formée par une cavité.The local deformation 74 is produced by a cavity when looking at the internal face of the flat cutting surface 71 facing the support 2, that is to say by a depression of the flat optical surface 71 in an opposite direction to support 2. The represents a low-angle view of the collector 7 revealing the reflective surface 72 and the face of the flat cut-off surface 71 which is turned towards the inside of the light module and which is intended to be impacted by the light rays. With this viewing angle, the local deformation 74 takes the form of a cavity formed in the planar cutting surface. We thus understand, by looking at Figures 1 to 4, that the local deformation is a relief which tends to move away from the interior of the light module. Local deformation 74 is thus formed by a cavity.
La déformation locale 74 est configurée pour que la majorité, de préférence la totalité des rayons lumineux 102 émis par la source lumineuse 6 et atteignant la déformation locale 74 après déviation par la surface réfléchissante 72 soient déviés d’un angle supérieur ou égal à 60°. On peut observer que les rayons lumineux 102 atteignant la déformation locale arrivent selon une première direction sur la déformation locale 74, et sont renvoyés, après déviation par la déformation locale 74, selon une deuxième direction. L’angle de déviation est l’angle formé entre ces première et deuxième directions. On peut observer sur la que pour les deux rayons lumineux 102 tracés, l’angle de déviation est même supérieur à 90°. The local deformation 74 is configured so that the majority, preferably all of the light rays 102 emitted by the light source 6 and reaching the local deformation 74 after deflection by the reflecting surface 72 are deflected by an angle greater than or equal to 60° . It can be observed that the light rays 102 reaching the local deformation arrive in a first direction on the local deformation 74, and are returned, after deflection by the local deformation 74, in a second direction. The angle of deviation is the angle formed between these first and second directions. It can be observed on the that for the two light rays 102 traced, the angle of deviation is even greater than 90°.
Ainsi, la déformation locale 74 est configurée, en formes et en dimensions, pour diriger une partie, de préférence au moins la majorité, des rayons lumineux 102 émis par la source lumineuse 6 et atteignant la déformation locale 74 après déviation par la surface réfléchissante 72, à distance de la lentille de projection 3. Thus, the local deformation 74 is configured, in shape and dimensions, to direct a part, preferably at least the majority, of the light rays 102 emitted by the light source 6 and reaching the local deformation 74 after deflection by the reflecting surface 72 , at a distance from the projection lens 3.
Dans l’exemple illustré, au moins 85% des rayons lumineux émis par la source lumineuse 6 et atteignant la déformation locale 74 après déviation par la surface réfléchissante 72 sont déviés en direction d’une portion du module lumineux 1 distincte de la lentille de projection 3.In the example illustrated, at least 85% of the light rays emitted by the light source 6 and reaching the local deformation 74 after deflection by the reflective surface 72 are deflected towards a portion of the light module 1 distinct from the projection lens 3.
Dans l’exemple illustré et notamment visible sur la et sur la , la cavité formant la déformation locale 74 présente une forme oblongue s’étendant en longueur selon un premier axe d’allongement 76. Il est à noter que le premier axe d’allongement 76 est, avantageusement, sensiblement parallèle à l’axe optique des rayons lumineux générés par la source lumineuse 6 associée au collecteur 7 comportant cette déformation locale 74.In the example illustrated and in particular visible on the and on the , the cavity forming the local deformation 74 has an oblong shape extending in length along a first axis of elongation 76. It should be noted that the first axis of elongation 76 is, advantageously, substantially parallel to the optical axis of the light rays generated by the light source 6 associated with the collector 7 comprising this local deformation 74.
Dans le mode de réalisation représenté, la déformation locale 74 s’étend en longueur sur au moins 10 mm et plus particulièrement entre 10 mm et 17mm et en largeur sur au moins 5 mm et plus particulièrement entre 5 mm et 10 mm. Dans le mode de réalisation représenté, le creux formant la déformation locale 74 s’étend selon une direction d’enfoncement perpendiculaire au plan d’extension principal de la surface de coupure plane sur 2 mm. In the embodiment shown, the local deformation 74 extends in length over at least 10 mm and more particularly between 10 mm and 17 mm and in width over at least 5 mm and more particularly between 5 mm and 10 mm. In the embodiment shown, the hollow forming the local deformation 74 extends in a direction of depression perpendicular to the main plane of extension of the flat cutting surface over 2 mm.
Par ailleurs, la cavité de la déformation locale 74 est délimitée par un bord périphérique 75 formant une transition douce entre la surface optique plane 71 et la déformation locale 74. On comprend que le bord périphérique 75 permet de former une jonction sans arête vive entre la cavité et la surface optique plane 71. Plus particulièrement, dans le mode de réalisation représenté, le bord périphérique 75 est formé par un arrondi. Furthermore, the cavity of the local deformation 74 is delimited by a peripheral edge 75 forming a smooth transition between the flat optical surface 71 and the local deformation 74. It is understood that the peripheral edge 75 makes it possible to form a junction without sharp edges between the cavity and the flat optical surface 71. More particularly, in the embodiment shown, the peripheral edge 75 is formed by a rounding.
La déformation locale 74 peut présenter une surface dont la rugosité est différente de celle du reste de la surface de coupure plane 71. Plus particulièrement, le bord périphérique 75 peut servir de démarcation entre une surface lisse sur quasiment l’ensemble de la surface de coupure plane et une surface diffusante correspondant à la surface de la déformation locale 74. Cette surface diffusante peut notamment comprendre une pluralité de reliefs formant un grainage. Ce grainage permet notamment de disperser les rayons parasites et de s’assurer que si certains rayons parasites devaient toutefois être déviés en direction de la lentille de projection, ils soient isolés et ne génèrent pas un problème d’homogénéité du faisceau d’éclairage amené à être projeté par la lentille de projection.The local deformation 74 may present a surface whose roughness is different from that of the rest of the flat cutting surface 71. More particularly, the peripheral edge 75 can serve as a demarcation between a smooth surface on almost the entire cutting surface. plane and a diffusing surface corresponding to the surface of the local deformation 74. This diffusing surface may in particular comprise a plurality of reliefs forming a graining. This graining makes it possible in particular to disperse the parasitic rays and to ensure that if certain parasitic rays should however be deflected towards the projection lens, they are isolated and do not generate a problem of homogeneity of the lighting beam brought to be projected by the projection lens.
Alternativement, la déformation locale 74 peut présenter une surface dont la rugosité est identique à celle du reste de la surface de coupure plane 71. En particulier, la surface de coupure plane peut présenter une surface lisse, et la surface de la déformation locale 74 peut être également lisse. Cela permet d’éviter de prévoir une partie pour former le grainage de la déformation locale dans le moule.Alternatively, the local deformation 74 may present a surface whose roughness is identical to that of the rest of the planar cut-off surface 71. In particular, the planar cut-off surface may present a smooth surface, and the surface of the local deformation 74 may also be smooth. This makes it possible to avoid providing a part to form the graining of the local deformation in the mold.
Tel que cela a pu être évoqué, la permet la représentation d’un tracé partiel des rayons lumineux émis par la source lumineuse 6 dont certains sont déviés par la déformation locale 74 en direction d’une surface d’absorption ou de déviation 78. La source lumineuse 6 émet des rayons lumineux dont les premiers rayons lumineux 101 et les deuxièmes rayons lumineux 102. Les premiers rayon lumineux 101 sont collectés par la surface réfléchissante 72 et sont réfléchis en direction de la lentille de projection 3 et, plus précisément, atteignent directement ladite lentille de projection 3. Les deuxièmes rayons lumineux 102 sont, à l’instar des premiers rayons lumineux 101, collectés par la surface réfléchissante 72 et réfléchis en direction de la lentille de projection 3. Ces deuxièmes rayons lumineux 102 ne sont pas prévus pour traverser la lentille de projection 3 et le rôle de la déformation locale 74 est de les diriger dans une portion distincte de la lentille de projection 3, ici en direction de la surface d’absorption ou de déviation 78. Cette surface d’absorption ou de déviation 78 comprend ici une pluralité de prismes 91 aptes à dévier les deuxièmes rayons lumineux 102 en direction d’une portion du module lumineux 1 distincte de la lentille de projection 3.As has been mentioned, the allows the representation of a partial trace of the light rays emitted by the light source 6, some of which are deflected by the local deformation 74 towards an absorption or deflection surface 78. The light source 6 emits light rays whose first light rays 101 and the second light rays 102. The first light rays 101 are collected by the reflective surface 72 and are reflected in the direction of the projection lens 3 and, more precisely, directly reach said projection lens 3. The second rays light 102 are, like the first light rays 101, collected by the reflecting surface 72 and reflected in the direction of the projection lens 3. These second light rays 102 are not intended to pass through the projection lens 3 and the role of the local deformation 74 is to direct them in a distinct portion of the projection lens 3, here in the direction of the absorption or deflection surface 78. This absorption or deflection surface 78 here comprises a plurality of prisms 91 capable of deflecting the second light rays 102 towards a portion of the light module 1 distinct from the projection lens 3.
Il ressort de la description qui vient d’être faite que la présente invention remplit les buts qu’elle s’est fixés, à savoir proposer un module lumineux dans lequel un collecteur est associé à une surface de coupure plane pour limiter la propagation de rayons émanant directement d’une source lumineuse, et dans lequel la surface de coupure plane est configurée pour limiter les rayons parasites qu’elles peut générer en déviant des rayons lumineux émis par cette source lumineuse et préalablement déviés par une surface réfléchissante dont on cherche à projeter l’image par l’intermédiaire d’une lentille de projection.It appears from the description which has just been made that the present invention fulfills the aims which it has set itself, namely to propose a light module in which a collector is associated with a flat cutting surface to limit the propagation of rays emanating directly from a light source, and in which the flat cutting surface is configured to limit the parasitic rays that they can generate by deflecting light rays emitted by this light source and previously deflected by a reflective surface from which it is sought to project the image through a projection lens.
La présente invention ne saurait toutefois se limiter aux moyens et configurations décrits et illustrés ici et elle s’étend également à tout moyen et toute configuration équivalents ainsi qu’à toute combinaison techniquement opérante de tels moyens, dès lors qu’elle permet, par une déformation de la surface de coupure plane de dévier d’éventuels rayons lumineux parasites vers une portion du module lumineux distincte de la lentille de projection.
The present invention cannot, however, be limited to the means and configurations described and illustrated here and it also extends to any equivalent means and configuration as well as to any technically effective combination of such means, since it allows, by a deformation of the flat cutting surface to deflect possible parasitic light rays towards a portion of the light module distinct from the projection lens.

Claims (13)

  1. Module lumineux (1) pour dispositif d’éclairage d’un véhicule, comprenant au moins une source lumineuse (6) apte à émettre des rayons lumineux (101, 102) et un collecteur (7) comportant une surface réfléchissante (72) destinée à collecter et à réfléchir au moins une partie des rayons lumineux (101, 102) émis par ladite source lumineuse (6) en direction d’une lentille de projection (3) du module lumineux (1) pour former un faisceau d’éclairage, caractérisé en ce qu‘il comprend une surface de coupure plane (71) prolongeant la surface réfléchissante (72) du collecteur (7) en direction de la lentille de projection (3), la surface de coupure plane (71) comportant une déformation locale (74) formant une zone de déviation des rayons lumineux (102) déviés par la surface réfléchissante du collecteur.Light module (1) for a vehicle lighting device, comprising at least one light source (6) capable of emitting light rays (101, 102) and a collector (7) comprising a reflective surface (72) intended to collecting and reflecting at least part of the light rays (101, 102) emitted by said light source (6) towards a projection lens (3) of the light module (1) to form a lighting beam, characterized in that it comprises a flat cutting surface (71) extending the reflecting surface (72) of the collector (7) towards the projection lens (3), the flat cutting surface (71) comprising a local deformation ( 74) forming a deflection zone for the light rays (102) deflected by the reflecting surface of the collector.
  2. Module lumineux (1) selon la revendication précédente, caractérisé en ce que la déformation locale (74) est délimitée par un bord périphérique (75) formé par un arrondi.Light module (1) according to the preceding claim, characterized in that the local deformation (74) is delimited by a peripheral edge (75) formed by a rounding.
  3. Module lumineux (1) selon l’une quelconque des revendications précédentes, caractérisé en ce que la déformation locale (74) comprend sur au moins une partie de sa surface une surface diffusante. Light module (1) according to any one of the preceding claims, characterized in that the local deformation (74) comprises on at least part of its surface a diffusing surface.
  4. Module lumineux (1) selon l’une quelconque des revendications précédentes, caractérisé en ce que la majorité, de préférence la totalité, des rayons lumineux (102) atteignant la déformation locale (74) sont déviés d’un angle supérieur ou égal à 60°.Light module (1) according to any one of the preceding claims, characterized in that the majority, preferably all, of the light rays (102) reaching the local deformation (74) are deflected by an angle greater than or equal to 60 °.
  5. Module lumineux (1) selon l’une quelconque des revendications précédentes, caractérisé en ce que la déformation locale (74) est configurée pour diriger une partie, de préférence la majorité, des rayons lumineux (102) atteignant la déformation locale (74) à distance de la lentille de projection (3).Light module (1) according to any one of the preceding claims, characterized in that the local deformation (74) is configured to direct a part, preferably the majority, of the light rays (102) reaching the local deformation (74) to distance from the projection lens (3).
  6. Module lumineux (1) selon la revendication précédente, caractérisé en ce que la déformation locale (74) est configurée pour diriger au moins 85% des rayons lumineux (102) atteignant la déformation locale (74) à distance de la lentille de projection (3).Light module (1) according to the preceding claim, characterized in that the local deformation (74) is configured to direct at least 85% of the light rays (102) reaching the local deformation (74) away from the projection lens (3). ).
  7. Module lumineux (1) selon l’une des revendications précédentes, dans lequel au moins une partie des rayons lumineux (102) atteignant la déformation locale (74) est déviée en direction d’une surface d’absorption ou de déviation (78) disposée en regard de la surface de coupure plane (71). Light module (1) according to one of the preceding claims, in which at least part of the light rays (102) reaching the local deformation (74) is deflected in the direction of an absorption or deflection surface (78) arranged facing the flat cutting surface (71).
  8. Module lumineux (1) selon l’une quelconque des revendications précédentes, caractérisé en ce que la déformation locale (74) présente une forme oblongue dont l’axe principal d’allongement (76) est dirigé vers la lentille de projection.Light module (1) according to any one of the preceding claims, characterized in that the local deformation (74) has an oblong shape whose main axis of elongation (76) is directed towards the projection lens.
  9. Module lumineux (1) selon la revendication précédente, caractérisé en ce que la déformation locale (74) présente une dimension, le long de l’axe d’allongement principal (76), d’au moins 10 mm.Light module (1) according to the preceding claim, characterized in that the local deformation (74) has a dimension, along the main axis of elongation (76), of at least 10 mm.
  10. Module lumineux (1) selon l’une des revendications 8 ou 9, dans lequel la source lumineuse (6) est configurée pour former un faisceau d’éclairage selon un axe optique, caractérisé en ce que l’axe d’allongement principal (76) et l’axe optique sont sensiblement parallèles.Light module (1) according to one of claims 8 or 9, in which the light source (6) is configured to form a lighting beam along an optical axis, characterized in that the main elongation axis (76 ) and the optical axis are substantially parallel.
  11. Module lumineux (1) selon l’une quelconque des revendications précédentes, caractérisé en ce que la lentille de projection (3) est configurée pour qu’un foyer objet de la lentille de projection soit disposé au niveau d’un bord d’extrémité arrière (73) du collecteur (7), à l’opposé de la surface de coupure plane (71).Light module (1) according to any one of the preceding claims, characterized in that the projection lens (3) is configured so that an object focus of the projection lens is arranged at a rear end edge (73) of the collector (7), opposite the flat cutting surface (71).
  12. Module lumineux selon l’une quelconque des revendications précédentes, caractérisé en ce la déformation locale (74) s’étend selon une direction d’enfoncement perpendiculaire au plan d’extension principal sur au moins 2 mm.Light module according to any one of the preceding claims, characterized in that the local deformation (74) extends in a direction of depression perpendicular to the main extension plane for at least 2 mm.
  13. Module lumineux (1) selon l’une quelconque des revendications précédentes, caractérisé en ce que la source lumineuse (6), la surface réfléchissante, la surface de coupure plane et la lentille de projection sont configurées et agencées les unes par rapport aux autres pour générer un faisceau d’éclairage à coupure.Light module (1) according to any one of the preceding claims, characterized in that the light source (6), the reflecting surface, the planar cut-off surface and the projection lens are configured and arranged relative to each other to generate a cut-off lighting beam.
PCT/EP2023/066308 2022-06-29 2023-06-16 Light module for a motor vehicle WO2024002727A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR2206552 2022-06-29
FR2206552A FR3137436A1 (en) 2022-06-29 2022-06-29 Light module for motor vehicle.

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WO2024002727A1 true WO2024002727A1 (en) 2024-01-04

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2733413A1 (en) * 2012-11-16 2014-05-21 Valeo Vision Optical module for headlamps for automotive vehicles
DE102016103225A1 (en) * 2015-03-11 2016-09-15 Panasonic Intellectual Property Management Co., Ltd. Lighting device and mobile object containing the same
DE202017102646U1 (en) * 2017-03-14 2017-05-29 Yujing Technology Co., Ltd. Modular lens lamp for vehicles equipped with a high beam and low beam assembly
CN210740275U (en) * 2019-11-13 2020-06-12 华域视觉科技(上海)有限公司 Optical element, optical module and vehicle lamp
WO2022129420A1 (en) * 2020-12-17 2022-06-23 Valeo Vision Light-emitting module that images the illuminated surface of a collector, with a blocker of parasitic rays
WO2022129426A1 (en) * 2020-12-18 2022-06-23 Valeo Vision Motor-vehicle lighting module

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2733413A1 (en) * 2012-11-16 2014-05-21 Valeo Vision Optical module for headlamps for automotive vehicles
DE102016103225A1 (en) * 2015-03-11 2016-09-15 Panasonic Intellectual Property Management Co., Ltd. Lighting device and mobile object containing the same
DE202017102646U1 (en) * 2017-03-14 2017-05-29 Yujing Technology Co., Ltd. Modular lens lamp for vehicles equipped with a high beam and low beam assembly
CN210740275U (en) * 2019-11-13 2020-06-12 华域视觉科技(上海)有限公司 Optical element, optical module and vehicle lamp
WO2022129420A1 (en) * 2020-12-17 2022-06-23 Valeo Vision Light-emitting module that images the illuminated surface of a collector, with a blocker of parasitic rays
WO2022129426A1 (en) * 2020-12-18 2022-06-23 Valeo Vision Motor-vehicle lighting module

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