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EP4051954B1 - Headlamp adjustable between left-hand drive and right-hand drive - Google Patents

Headlamp adjustable between left-hand drive and right-hand drive Download PDF

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Publication number
EP4051954B1
EP4051954B1 EP20789992.3A EP20789992A EP4051954B1 EP 4051954 B1 EP4051954 B1 EP 4051954B1 EP 20789992 A EP20789992 A EP 20789992A EP 4051954 B1 EP4051954 B1 EP 4051954B1
Authority
EP
European Patent Office
Prior art keywords
complementary
lighting module
optical
optical axis
illuminated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20789992.3A
Other languages
German (de)
French (fr)
Other versions
EP4051954A1 (en
Inventor
Yves Gromfeld
Corentin DEBAINE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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 SAS filed Critical Valeo Vision SAS
Publication of EP4051954A1 publication Critical patent/EP4051954A1/en
Application granted granted Critical
Publication of EP4051954B1 publication Critical patent/EP4051954B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/62—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution for adaptation between right-hand and left-hand traffic
    • 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
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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
    • F21W2102/155—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 having inclined and horizontal cutoff lines

Definitions

  • the invention relates to the field of lighting, in particular lighting for motor vehicles.
  • the nighttime automobile lighting function with oncoming traffic has a higher cut-off, in accordance with current regulations.
  • European regulations provide for an upper horizontal cut-off with an oblique portion in the center of the beam, so that a left or right half of the light beam has a lower horizontal cut-off than the other half. More particularly, for right-hand drive countries, that is to say where the driving position is on the left of the vehicle, the left half of the light beam is less than the right half. Conversely, in right-hand drive countries, that is to say where the driving position is to the right of the vehicle, the left half of the light beam is greater than the right half.
  • the American regulations provide, in particular, for a flat upper horizontal cutoff, that is to say without an oblique portion. This means that automotive headlights must be configured differently depending on these territories.
  • the document FR 2 903 946 A1 shows an automobile headlight allowing the generation of a code beam with oblique cut-off line for right-hand driving or left-hand driving.
  • the subject of the invention is a lighting module as described in claim 1.
  • the main light beam combined with the first complementary light beam corresponds to a cut-off lighting function with jump for right-hand driving.
  • the main light beam combined with the second complementary light beam corresponds to a cut-off lighting function with jump for left-hand driving.
  • the oblique lateral cuts of the first and second complementary beams are adjacent to the optical axis, the first complementary beam extending exclusively to the right of said optical axis and the second complementary beam extending exclusively to left of said optical axis.
  • the lighting module is configured so that the first and second optical systems are only active alternately.
  • each of the first and second complementary light beams also has an upper horizontal cutoff and/or a lower horizontal cutoff.
  • the surfaces capable of being illuminated of the first and second complementary optical systems are arranged laterally on either side of the optical axis.
  • the surfaces capable of being illuminated of the first and second complementary optical systems are arranged under the optical axis.
  • each of the surfaces capable of being illuminated of the first and second complementary optical systems has an average height H and an average width L greater than 5 times said average height H.
  • each of the surfaces capable of being illuminated of the first and second complementary optical systems comprises an inclined lateral edge capable of forming the oblique lateral cutoff of the corresponding complementary light beam.
  • the inclined lateral edges of the surfaces capable of being illuminated of the first and second complementary optical systems are adjacent to the optical axis and arranged laterally on either side of said optical axis.
  • the main optical system comprises a light source with a main direction of emission of light rays directed upwards and a collector with a reflective surface in the shape of a cap capable of receiving the light rays and with a lower rear edge adjacent to the optical axis.
  • the surfaces capable of being illuminated of the first and second complementary optical systems are, at the optical axis, adjacent to the rear and lower edge of the reflecting surface of the collector.
  • the projection device comprises a focus located on the optical axis at the level of the lower rear edge of the reflective surface of the collector or at the front of said edge.
  • the measures of the invention are interesting in that they make it possible to make the lighting module with upper horizontal cut-off lighting function of the “code” type (“low-beam” in English) compatible with different regulations and sides driving (left-hand drive and right-hand drive), in a simple, economical and compact way.
  • FIG. 1 is a perspective view of a lighting module according to a first embodiment.
  • lighting module we mean a unitary assembly, that is to say where all the optical parts are assembled and positioned with each other so as to be able to provide one or more lighting or light signaling functions.
  • Such a module is intended to be mounted in a housing closed by a glass, possibly with one or more other light or lighting modules, with a view to forming a spotlight.
  • the lighting module 2 comprises several optical systems capable of forming different lighting beams of one or more lighting functions, in this case a lighting function with upper horizontal cutoff, commonly referred to as "code” (or “code”). low-beam” in English) and a lighting function without horizontal cut-off, commonly referred to as “road” (or “high-beam” in English).
  • the lighting module 2 comprises a main optical system 4 capable of forming a main light beam with upper horizontal cut-off, intended to perform a lighting function designated “code”.
  • the main optical system 4 essentially comprises a light source 6 and a collector 8 with a reflective surface in the shape of a cap and configured to receive and reflect along the optical axis 10 the light rays emitted by said light source.
  • the lighting module 2 also includes two complementary optical systems 12 and 14, arranged under the optical axis 10 and configured to form light beams complementary to the main light beam formed by the main optical system 4, and this in an alternative manner.
  • Each of the complementary optical systems 12 and 14 essentially comprises a light source 16 or 18, respectively, and an optical part 20.1 or 20.2, respectively.
  • the optical parts 20.1 and 20.2 are unitary and form a common optical part 20.
  • Each of the complementary light beams formed by the complementary optical systems 12 and 14 completes the main light beam so as to form a projection at the level of the cutoff horizontal, in accordance with current regulations, particularly in Europe.
  • the first complementary optical system 12 forms a complementary light beam located to the right of the optical axis with an oblique lateral cutoff adjacent to the optical axis, so as to form a projection upwards to the right of the optical axis.
  • the second complementary optical system 14 forms a complementary light beam located to the left of the optical axis with an oblique lateral cut adjacent to the optical axis, so as to form a projection upwards to the left of the optical axis, in accordance with the regulations for left-hand driving.
  • the lighting module 2 comprises a projection device 22, in the form of a lens, capable of imaging and projecting the illuminated reflective surface of the collector 8 of the main optical system 4, as well as an illuminated surface of the optical part 20.1 or 20.2 of the first or second complementary optical systems 12 and 14.
  • the lighting module 2 may comprise one or more additional optical systems 24 configured to form light beams with a higher horizontal cutoff complementing the main light beam produced by the main optical system 4.
  • THE figures 2 and 3 are two perspective views of the optical parts 20.1 and 20.2 of the first and second complementary optical systems 12 and 14 ( figure 1 ). These two optical parts are made of transparent or translucent materials and form diopters, each with an entry face, a reflection face and an exit face of the light emitted by the associated light source. Entrance faces 20.1.1 and 20.2.1 present in a vertical plane a convex curved profile arranged opposite the light sources 16 and 18 respectively.
  • the reflection faces 20.1.2 and 20.2.2 are rear faces of the optical parts 20.1 and 20.2 and have a slightly curved and convex profile in a vertical plane.
  • the exit faces 20.1.3 and 20.2.3 are front faces of the optical parts 20.1 and 20.2, adjacent to the reflecting surface of the collector 8 of the main optical system 4 ( figure 1 ). They present in a horizontal plane a concave curved profile corresponding to the profile of the adjacent rear and lower edge of the reflective surface of the collector 8 of the main optical system 4 ( figure 1 ).
  • each of these faces has an average width L which is greater than a multiple of the average height H, for example greater than 5 times the average height H.
  • complementary light beam imaging such an illuminated face will thus have a corresponding shape, that is to say vertically thin. This image will be inverted as the projection device 22 passes ( figure 1 ).
  • the interior lateral edge relative to the optical axis (passing between the two optical parts 20.1 and 20.2, that is to say in the center the common optical part 20) designated by the reference signs 20.1.3.1 and 20.2.3.1 is inclined relative to the vertical, for example by an angle between 45° and 75° (corresponding to an inclination between 45° and 15° relative to the horizontal), so as to form the oblique lateral cutoff of the corresponding complementary light beam.
  • FIG. 4 is a schematic view in vertical longitudinal section of the lighting module of the figure 1 .
  • the section passes through the optical axis 10 while for the complementary optical devices 12 and 14 the section is offset perpendicular to the cutting plane of the main optical system 4 and passes optionally through one of said complementary optical systems and the corresponding light source.
  • the light source 6 illuminates the reflective surface of the collector 8, from the lower rear edge 8.1 to the front edge 8.2 of said reflective surface.
  • the projection device 22 comprises a focus 22.1 located on the optical axis 10, at the level of the lower rear edge 8.1 or at a position further forward, however still at the level of the collector 8, ideally over a first half of the length of the collector along the optical axis. With a certain depth of field, this allows the projection device 22 to image the reflective surface of the collector 8 while it is illuminated, where the area of the reflective surface located along the rear and lower edge 8.1 is imaged with clarity in order to achieve a clear upper horizontal cut. To image the illuminated reflective surface, the main optical system 4 including the projection device 22 must be stigmatic.
  • the optical device 22 advantageously has a large focal length, more advantageously still a large geometric aperture.
  • the focal length is greater than 40mm, preferably greater than 50mm, even more preferably greater than 60mm.
  • the focal length is advantageously less than 100m.
  • the path of the rays emitted by the corresponding light source 16 or 18 can be observed. These are potentially refracted at the diopter formed by the entrance face 20.1.1 or 20.2.1, then they are reflected by the reflection face 20.1.2 or 20.2.2, advantageously by the principle of total reflection when the angel of incidence is greater than the limiting angle of refraction, and then potentially refracted as the diopter formed by the exit face 20.1.3 or 20.2.3 then forming an illuminated surface.
  • This illuminated surface is advantageously adjacent to the optical axis 10 and to the lower rear edge 8.1 of the reflecting surface of the collector 8.
  • the illuminated surface 20.1.3 or 20.2.3 is adjacent to the focus 22.1 of the projection device 22 , or at least close to it. This illuminated surface is then imaged clearly, this which makes it possible to create a complementary light beam with clear cuts.
  • FIG. 5 illustrates the collector 8 of the main optical system 4 ( figures 1 And 4 ).
  • the view on the left is a perspective view showing the shape of the cap of the collector, advantageously with an elliptical or parabolic profile, advantageously of revolution, at least in first approximation, around an axis corresponding to the optical axis 10.
  • the view on the right shows the reflective surface when illuminated by the light source, seen from the front of the projection device 22 ( figures 1 And 4 ). This in fact causes an inversion of the image, explaining that the image of the lower rear edge 8.1 of the reflective surface in fact forms the upper horizontal edge of the projected image. Similarly, the front edge 8.2 of the reflective surface forms the lower edge of the projected image.
  • the light is concentrated in the middle of the surface, near the bottom rear edge.
  • the fact that the focus 22.1 of the projection device is on the optical axis and close to, or adjacent to the lower rear edge 8.1 of the reflective surface of the collector 8 means that the central part of the reflective surface, close to said edge, will be imaged with greater clarity. Under these conditions, the upper horizontal cutoff of the main light beam will be sharper in the center than on the sides.
  • FIG. 6 schematically illustrates the images of the main and complementary light beams.
  • the H axis corresponds to the horizontal direction passing through the optical axis and the V axis corresponds to the vertical direction also passing through the optical axis.
  • the image of the main light beam 26 includes an upper horizontal cutoff 26.1 that is generally flat or straight. It is formed by the image of the rear and lower edge 8.1 of the reflecting surface of the collector 8 of the main optical system 4 ( figures 4 and 5 ). It should be noted, however, that this upper horizontal cutoff 26.1 could have a non-flat profile since the lower rear edge 8.1 of the reflective surface of the collector 8 is not planar.
  • the image of the main light beam 26 includes a lower U-shaped cutoff 26.2, less sharp than the upper horizontal cutoff 26.1, formed by the front edge 8.2 of the reflecting surface of the collector 8 ( figures 4 and 5 ).
  • These four cuts are formed by the lateral, upper and lower edges of the illuminated surface formed by the exit face 20.1.3 of the corresponding diopter 20.1 ( figure 2 ) it being understood that there is an inversion of the image, corresponding to a rotation of 180° around the optical axis 10.
  • the image of the second complementary light beam 30, located to the left of the optical axis 10 is produced by the second complementary optical system 14 ( figure 1 ) located to the right of the optical axis. It similarly comprises an oblique lateral cutoff 30.1 adjacent to the optical axis 10, an exterior lateral cutoff 30.2 and upper 30.3 and lower horizontal cuts 30.4.
  • the combination of the main light beam 28 with the first complementary light beam 28 corresponds to a so-called “code” cut-off lighting function (“low-beam” in English) for right-hand driving according to the regulations in force in particular in Europe.
  • the combination of the main light beam 26 with the second complementary light beam 30 corresponds to a so-called “code” cut-off lighting function (“low-beam” in English) for left-hand driving following the same regulations.
  • the main light beam 26 alone can correspond to a so-called “code” cut-off lighting function (“low-beam” in English) according to the regulations in force in the United States of America.
  • THE figures 7 and 8 illustrate a lighting module according to a second embodiment of the invention.
  • the reference numbers of the first embodiment are used to designate identical or corresponding elements, these numbers being however increased by 100. Reference is also made to the description of these elements in relation to the first embodiment. Specific numbers between 100 and 200 are used to designate specific items.
  • FIG. 7 illustrates in perspective and schematically a lighting module 102 similar to that of the first embodiment. It stands out essentially by the construction of complementary optical systems 112 and 114, the optical parts 120.1 and 120.2 of which are no longer dioptric parts but reflectors. Similar to the first embodiment, the main optical system 104 produces a main light beam with an upper horizontal cutoff, preferably flat, and the complementary optical systems 112 and 114 produce complementary light beams located to the right and left of the optical axis. , respectively, with an oblique lateral cutoff adjacent to the optical axis.
  • FIG 8 is a perspective view of the main optical system 104 and the first and second complementary optical systems 112 and 114 respectively.
  • the collector 108 of the main optical system 104 comprises a reflective surface in the form of a cap with a lower rear edge 108.1 adjacent to the optical axis 110 and a front edge 108.2 which corresponds in this case to a truncation of the cap by a higher plane close to a horizontal orientation.
  • the light source 106 is configured to illuminate this reflective surface, the latter being imaged by the projection device 122 ( figure 1 ) to form the main beam with an upper horizontal cutoff formed by the essentially sharp image of the lower rear edge 108.1 of the reflective surface in question. The more or less clear image of the front edge 108.2 then forms the lower limit of the main light beam.
  • the reflectors 120.1 and 120.2 forming the optical parts of the first and second complementary optical systems 112 and 114 are adjacent to the lower rear edge 108.1 of the reflective surface of the collector 108 of the main optical system 104.
  • Each of the reflectors 120.1 and 120.2 comprises a first reflective surface 120.1.1 or 120.2.1 extending essentially horizontally from the lower rear edge 108.1 of the reflective surface of the collector 108 of the main optical system 104, and a second reflective surface 120.1.2 or 120.2.2 extending essentially vertically from the first reflective surface 120.1.1 or 120.2.1.
  • Each of the second reflective surfaces 120.1.2 or 120.2.2 has in a horizontal plane a concave curved profile of greater average radius than the rear and lower edge 108.1 of the reflective surface of the collector 108 of the optical system main 104.
  • the reflectors 120.1 and 120.2 are configured to collect the light emitted by the light sources 116 and 118 respectively so as to illuminate the second reflective surfaces 120.1.2 and 120.2.2 respectively. These are comparable to the illuminated surfaces of the diopters 20.1 and 20.2 of the first embodiment formed by the output faces 20.1.3 and 20.2.3 of said diopters (see figure 2 ).
  • Each of the second reflective surfaces 120.1.2 or 120.2.2 extends horizontally with an average width L greater than a multiple, for example 5 or 10, of the average height H.
  • Each of these surfaces has an inclined lateral edge 120.1.2.1 or 120.2.2.1 adjacent to the optical axis 110, so as to form an oblique lateral cut-off edge of the corresponding complementary light beam.
  • the projection device 122 images these illuminated reflective surfaces to form complementary light beams similar to the complementary light beams 28 and 30 of the first embodiment ( Figure 6 ).
  • the light source of the main optical system and the light sources of the complementary optical systems can be arranged on a common support, due to their proximity and the fact that they all shine in the same direction.
  • the complementary optical systems can take various forms, as long as they are configured to form alternative complementary beams with opposite oblique lateral cutoffs capable of forming with the main light beam with upper horizontal cutoff , advantageously of flat profile, an upper horizontal cut with a projection in the center, in accordance with the regulations in force particularly in Europe.
  • the main optical system can also take various forms, as long as it produces a light beam with a higher horizontal cutoff, advantageously flat.
  • the invention which has just been described is advantageous in that it makes it possible to produce a single lighting module for a “code” type cut-off lighting function (or “low-beam” in English) compatible for different regulations, such as European regulations with specific jump for left-hand and right-hand driving, and American regulations without jump. Compliance with the regulations to be respected is then done by specific activation of one or none of the complementary optical systems.

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

Description

Domaine techniqueTechnical area

L'invention a trait au domaine de l'éclairage, en particulier de l'éclairage pour véhicule automobile.The invention relates to the field of lighting, in particular lighting for motor vehicles.

Technique antérieurePrior art

La fonction d'éclairage automobile de nuit avec une circulation en sens inverse, couramment appelée « code » (« low beam » en anglais), présente une coupure supérieure, conformément aux réglementations en vigueur. La réglementation européenne prévoit cependant une coupure supérieure horizontale avec une portion oblique au centre du faisceau, de manière à ce qu'une moitié gauche ou droite du faisceau lumineux présente une coupure horizontale inférieure à l'autre moitié. Plus particulièrement, pour les pays à conduite à droite, c'est-à-dire où le poste de conduite est à gauche du véhicule, la moitié gauche du faisceau lumineux est inférieure à la moitié droite. Inversement, dans les pays à conduite à droite, c'est-à-dire où le poste de conduite est à droite du véhicule, la moitié gauche du faisceau lumineux est supérieure à la moitié droite. La réglementation américaine prévoit quant à elle, notamment, une coupure horizontale supérieure plate, c'est-à-dire sans portion oblique. Cela signifie que les projecteurs automobiles doivent être configurés différemment en fonction de ces territoires.The nighttime automobile lighting function with oncoming traffic, commonly called “code” (“low beam” in English), has a higher cut-off, in accordance with current regulations. European regulations, however, provide for an upper horizontal cut-off with an oblique portion in the center of the beam, so that a left or right half of the light beam has a lower horizontal cut-off than the other half. More particularly, for right-hand drive countries, that is to say where the driving position is on the left of the vehicle, the left half of the light beam is less than the right half. Conversely, in right-hand drive countries, that is to say where the driving position is to the right of the vehicle, the left half of the light beam is greater than the right half. The American regulations provide, in particular, for a flat upper horizontal cutoff, that is to say without an oblique portion. This means that automotive headlights must be configured differently depending on these territories.

Le document de brevet publié US 2018180246 A1 divulgue un projecteur automobile comprenant un écran disposé dans le chemin optique des rayons lumineux formant un faisceau lumineux à coupure, dont la transmittance est variable localement, comme par exemple un écran à cristaux liquides, couramment désigné par l'acronyme LCD (« Liquid Crystal Display »). Plus particulièrement, les pixels de cet écran peuvent être commandés spécifiquement pour réaliser les coupures horizontales supérieures susmentionnées pour conduite à gauche et conduite à droite, respectivement, c'est-à-dire avec des portions obliques centrales opposées. En d'autres termes, cet enseignement prévoit une configuration par commande électrique du projecteur pour différentes réglementations, en particulier conduite à gauche et conduite à droite. Cependant la présence de l'écran dont la transmittance est variable localement est coûteuse et présente aussi l'inconvénient de générer des pertes de lumière importantes, dues à la transmittance maximale limitée. Le document FR 2 903 946 A1 montre un projecteur automobile permettant de générer un faisceau code avec ligne de coupure oblique pour conduite à droite ou pour conduite à gauche.The published patent document US 2018180246 A1 discloses an automobile headlight comprising a screen arranged in the optical path of the light rays forming a cut-off light beam, the transmittance of which is locally variable, such as for example a liquid crystal screen, commonly designated by the acronym LCD ("Liquid Crystal Display") "). More particularly, the pixels of this screen can be specifically controlled to produce the aforementioned upper horizontal cuts for left-hand drive and right-hand drive, respectively, that is to say with opposite central oblique portions. In other words, this teaching provides a configuration by electrical control of the projector for different regulations, in particular led to left and right hand drive. However, the presence of the screen whose transmittance is locally variable is expensive and also has the disadvantage of generating significant light losses, due to the limited maximum transmittance. The document FR 2 903 946 A1 shows an automobile headlight allowing the generation of a code beam with oblique cut-off line for right-hand driving or left-hand driving.

Exposé de l'inventionPresentation of the invention

L'invention a pour objet un module d'éclairage tel que décrit dans la revendication 1.The subject of the invention is a lighting module as described in claim 1.

Le faisceau lumineux principal combiné au premier faisceau lumineux complémentaire correspond à une fonction d'éclairage à coupure avec ressaut pour conduite à droite. Le faisceau lumineux principal combiné au deuxième faisceau lumineux complémentaire correspond à une fonction d'éclairage à coupure avec ressaut pour conduite à gauche.The main light beam combined with the first complementary light beam corresponds to a cut-off lighting function with jump for right-hand driving. The main light beam combined with the second complementary light beam corresponds to a cut-off lighting function with jump for left-hand driving.

Selon un mode avantageux de l'invention, les coupures latérales obliques des premier et deuxième faisceaux complémentaires sont adjacentes à l'axe optique, le premier faisceau complémentaire s'étendant exclusivement à droite dudit axe optique et le deuxième faisceau complémentaire s'étendant exclusivement à gauche dudit axe optique.According to an advantageous embodiment of the invention, the oblique lateral cuts of the first and second complementary beams are adjacent to the optical axis, the first complementary beam extending exclusively to the right of said optical axis and the second complementary beam extending exclusively to left of said optical axis.

Selon un mode avantageux de l'invention, le module d'éclairage est configuré pour que les premier et deuxième systèmes optiques ne soient actifs que de manière alternative.According to an advantageous embodiment of the invention, the lighting module is configured so that the first and second optical systems are only active alternately.

Selon un mode avantageux de l'invention, chacun des premier et deuxième faisceaux lumineux complémentaires présente, en outre, une coupure horizontale supérieure et/ou une coupure horizontale inférieure.According to an advantageous embodiment of the invention, each of the first and second complementary light beams also has an upper horizontal cutoff and/or a lower horizontal cutoff.

Selon un mode avantageux de l'invention, les surfaces aptes à être éclairées des premier et deuxième systèmes optiques complémentaires sont disposées latéralement de part et d'autre de l'axe optique.According to an advantageous embodiment of the invention, the surfaces capable of being illuminated of the first and second complementary optical systems are arranged laterally on either side of the optical axis.

Selon un mode avantageux de l'invention, les surfaces aptes à être éclairées des premier et deuxième systèmes optiques complémentaires sont disposées sous l'axe optique.According to an advantageous embodiment of the invention, the surfaces capable of being illuminated of the first and second complementary optical systems are arranged under the optical axis.

Selon un mode avantageux de l'invention, chacune des surfaces aptes à être éclairées des premier et deuxième systèmes optiques complémentaires présente une hauteur moyenne H et une largeur moyenne L supérieure à 5 fois ladite hauteur moyenne H.According to an advantageous embodiment of the invention, each of the surfaces capable of being illuminated of the first and second complementary optical systems has an average height H and an average width L greater than 5 times said average height H.

Selon un mode avantageux de l'invention, chacune des surfaces aptes à être éclairées des premier et deuxième systèmes optiques complémentaires comprend un bord latéral incliné apte à former la coupure latérale oblique du faisceau lumineux complémentaire correspondant.According to an advantageous embodiment of the invention, each of the surfaces capable of being illuminated of the first and second complementary optical systems comprises an inclined lateral edge capable of forming the oblique lateral cutoff of the corresponding complementary light beam.

Selon un mode avantageux de l'invention, les bords latéraux inclinés des surfaces aptes à être éclairées des premier et deuxième systèmes optiques complémentaires sont adjacents à l'axe optique et disposés latéralement de part et d'autre dudit axe optique.According to an advantageous embodiment of the invention, the inclined lateral edges of the surfaces capable of being illuminated of the first and second complementary optical systems are adjacent to the optical axis and arranged laterally on either side of said optical axis.

Selon un mode avantageux de l'invention, le système optique principal comprend une source lumineuse avec une direction principale d'émission de rayons lumineux dirigée vers le haut et un collecteur avec une surface réfléchissante en forme de calotte apte à recevoir les rayons lumineux et avec un bord arrière inférieur adjacent à l'axe optique.According to an advantageous embodiment of the invention, the main optical system comprises a light source with a main direction of emission of light rays directed upwards and a collector with a reflective surface in the shape of a cap capable of receiving the light rays and with a lower rear edge adjacent to the optical axis.

Selon un mode avantageux de l'invention, les surfaces aptes à être éclairées des premier et deuxième systèmes optiques complémentaires sont, à l'axe optique, adjacentes au bord arrière et inférieur de la surface réfléchissante du collecteur. Selon un mode avantageux de l'invention, le dispositif de projection comprend un foyer situé sur l'axe optique au niveau du bord arrière inférieur de la surface réfléchissante du collecteur ou à l'avant dudit bord.According to an advantageous embodiment of the invention, the surfaces capable of being illuminated of the first and second complementary optical systems are, at the optical axis, adjacent to the rear and lower edge of the reflecting surface of the collector. According to an advantageous embodiment of the invention, the projection device comprises a focus located on the optical axis at the level of the lower rear edge of the reflective surface of the collector or at the front of said edge.

Les mesures de l'invention sont intéressantes en ce qu'elles permettent de rendre le module d'éclairage avec fonction d'éclairage à coupure horizontale supérieure du type « code » (« low-beam » en anglais) compatible avec différentes réglementations et côtés de conduite (conduite à gauche et conduite à droite), et ce de manière simple, économique et compacte.The measures of the invention are interesting in that they make it possible to make the lighting module with upper horizontal cut-off lighting function of the “code” type (“low-beam” in English) compatible with different regulations and sides driving (left-hand drive and right-hand drive), in a simple, economical and compact way.

Brève description des dessinsBrief description of the drawings

  • [Fig 1] est une vue en perspective d'un module d'éclairage selon un premier mode de réalisation de l'invention ;[ Figure 1 ] is a perspective view of a lighting module according to a first embodiment of the invention;
  • [Fig 2] est une vue de face de la pièce optique des systèmes optiques complémentaires du module d'éclairage de la figure 1 ;[ Figure 2 ] is a front view of the optical part of the complementary optical systems of the lighting module of the figure 1 ;
  • [Fig 3] est une vue arrière de la pièce optique de la figure 2 ;[ Figure 3 ] is a rear view of the optical part of the figure 2 ;
  • [Fig 4] est une vue schématique en coupe du module d'éclairage de la figure 1 ;[ Figure 4 ] is a schematic sectional view of the lighting module of the figure 1 ;
  • [Fig 5] est une vue arrière et une vue de face via le dispositif de projection du collecteur du module d'éclairage de la figure 1 ;[ Figure 5 ] is a rear view and a front view via the projection device of the collector of the lighting module of the figure 1 ;
  • [Fig 6] est une représentation schématique des images lumineuses des faisceaux lumineux du module d'éclairage de la figure 1 ;[ Figure 6 ] is a schematic representation of the light images of the light beams of the lighting module of the figure 1 ;
  • [Fig 7] est une vue en perspective d'un module d'éclairage selon un deuxième mode de réalisation de l'invention ;[ Figure 7 ] is a perspective view of a lighting module according to a second embodiment of the invention;
  • [Fig 8] est une vue en perspective du collecteur du système optique principal et de la pièce optique des systèmes optiques complémentaires du module d'éclairage de la figure 7.[ Figure 8 ] is a perspective view of the collector of the main optical system and the optical part of the complementary optical systems of the lighting module of the Figure 7 .
Description détailléedetailed description

Dans la description qui va suivre, les notions « avant » et « arrière » sont à comprendre suivant l'axe optique du module d'éclairage, dans le sens normal de propagation des rayons lumineux. Aussi les notions « haut », « bas », « horizontal(e) » et « vertical(e) » sont à comprendre lorsque le module d'éclairage est en position opérationnelle, telle qu'illustrée notamment aux figures 1 et 7.In the description which follows, the notions “front” and “rear” are to be understood along the optical axis of the lighting module, in the normal direction of propagation of the light rays. Also the notions “top”, “bottom”, “horizontal” and “vertical” are to be understood when the lighting module is in the operational position, as illustrated in particular in figures 1 And 7 .

La figure 1 est une vue en perspective d'un module d'éclairage suivant un premier mode de réalisation. Par module d'éclairage on entend un ensemble unitaire, c'est-à-dire où toutes les pièces optiques sont assemblées et positionnées les unes aux autres de manière à pouvoir assurer une ou plusieurs fonctions d'éclairage ou de signalisation lumineuses. Un tel module est destiné à être monté dans un boîtier refermé par une glace, éventuellement avec un ou plusieurs autres modules lumineux ou d'éclairage, en vue de former un projecteur.There figure 1 is a perspective view of a lighting module according to a first embodiment. By lighting module we mean a unitary assembly, that is to say where all the optical parts are assembled and positioned with each other so as to be able to provide one or more lighting or light signaling functions. Such a module is intended to be mounted in a housing closed by a glass, possibly with one or more other light or lighting modules, with a view to forming a spotlight.

Le module d'éclairage 2 comprend plusieurs systèmes optiques aptes à former différents faisceaux d'éclairage d'une ou plusieurs fonctions d'éclairage, en l'occurrence une fonction d'éclairage à coupure horizontale supérieure, couramment désignée « code » (ou « low-beam » en anglais) et une fonction d'éclairage sans coupure horizontale, couramment désignée « route » (ou « high-beam » en anglais). Le module d'éclairage 2 comprend un système optique principal 4 apte à former un faisceau lumineux principal à coupure horizontale supérieure, destiné à réaliser une fonction d'éclairage désignée « code ». Le système optique principal 4 comprend essentiellement une source lumineuse 6 et un collecteur 8 avec une surface réfléchissante en forme de calotte et configurée pour recevoir et réfléchir suivant l'axe optique 10 les rayons lumineux émis par ladite source lumineuse. Le module d'éclairage 2 comprend également deux systèmes optiques complémentaires 12 et 14, disposés sous l'axe optique 10 et configurés pour former des faisceaux lumineux complémentaires au faisceau lumineux principal formé par le système optique principal 4, et ce de manière alternative. Chacun des systèmes optiques complémentaires 12 et 14 comprend essentiellement une source lumineuse 16 ou 18, respectivement, et une pièce optique 20.1 ou 20.2, respectivement. En l'occurrence les pièces optiques 20.1 et 20.2 sont unitaires et forment une pièce optique commune 20. Chacun des faisceaux lumineux complémentaires formés par les systèmes optiques complémentaires 12 et 14 complète le faisceau lumineux principal de manière à former un ressaut au niveau de la coupure horizontale, conformément à la réglementation en vigueur notamment en Europe. En pratique, le premier système optique complémentaire 12 forme un faisceau lumineux complémentaire situé à droite de l'axe optique avec une coupure latérale oblique adjacente à l'axe optique, de manière à former un ressaut vers le haut à droite de l'axe optique, conformément à la réglementation pour la conduite à droite. Similairement, le deuxième système optique complémentaire 14 forme un faisceau lumineux complémentaire situé à gauche de l'axe optique avec une coupure latérale oblique adjacente à l'axe optique, de manière à former un ressaut vers le haut à gauche de l'axe optique, conformément à la réglementation pour la conduite à gauche.The lighting module 2 comprises several optical systems capable of forming different lighting beams of one or more lighting functions, in this case a lighting function with upper horizontal cutoff, commonly referred to as "code" (or "code"). low-beam" in English) and a lighting function without horizontal cut-off, commonly referred to as "road" (or "high-beam" in English). The lighting module 2 comprises a main optical system 4 capable of forming a main light beam with upper horizontal cut-off, intended to perform a lighting function designated “code”. The main optical system 4 essentially comprises a light source 6 and a collector 8 with a reflective surface in the shape of a cap and configured to receive and reflect along the optical axis 10 the light rays emitted by said light source. The lighting module 2 also includes two complementary optical systems 12 and 14, arranged under the optical axis 10 and configured to form light beams complementary to the main light beam formed by the main optical system 4, and this in an alternative manner. Each of the complementary optical systems 12 and 14 essentially comprises a light source 16 or 18, respectively, and an optical part 20.1 or 20.2, respectively. In this case the optical parts 20.1 and 20.2 are unitary and form a common optical part 20. Each of the complementary light beams formed by the complementary optical systems 12 and 14 completes the main light beam so as to form a projection at the level of the cutoff horizontal, in accordance with current regulations, particularly in Europe. In practice, the first complementary optical system 12 forms a complementary light beam located to the right of the optical axis with an oblique lateral cutoff adjacent to the optical axis, so as to form a projection upwards to the right of the optical axis. , in accordance with the regulations for right-hand driving. Similarly, the second complementary optical system 14 forms a complementary light beam located to the left of the optical axis with an oblique lateral cut adjacent to the optical axis, so as to form a projection upwards to the left of the optical axis, in accordance with the regulations for left-hand driving.

Toujours en référence à la figure 1, le module d'éclairage 2 comprend un dispositif de projection 22, sous la forme d'une lentille, apte à imager et projeter la surface réfléchissante éclairée du collecteur 8 du système optique principal 4, ainsi qu'une surface éclairée de la pièce optique 20.1 ou 20.2 du premier ou deuxième systèmes optiques complémentaires 12 et 14.Still with reference to the figure 1 , the lighting module 2 comprises a projection device 22, in the form of a lens, capable of imaging and projecting the illuminated reflective surface of the collector 8 of the main optical system 4, as well as an illuminated surface of the optical part 20.1 or 20.2 of the first or second complementary optical systems 12 and 14.

Encore en référence à la figure 1, le module d'éclairage 2 peut comprendre un ou plusieurs systèmes optiques additionnels 24 configurés pour former des faisceaux lumineux à coupure horizontale supérieure complétant le faisceau lumineux principal produit par le système optique principal 4.Again with reference to the figure 1 , the lighting module 2 may comprise one or more additional optical systems 24 configured to form light beams with a higher horizontal cutoff complementing the main light beam produced by the main optical system 4.

Les figures 2 et 3 sont deux vues en perspective des pièces optiques 20.1 et 20.2 des premier et deuxième systèmes optiques complémentaires 12 et 14 (figure 1). Ces deux pièces optiques sont en matériaux transparent ou translucide et forment des dioptres avec, chacun, une face d'entrée, une face de réflexion et une face de sortie de la lumière émise par la source lumineuse associée. Les faces d'entrées 20.1.1 et 20.2.1 présentent dans un plan vertical un profil courbe convexe disposé en face des sources lumineuses 16 et 18 respectivement. Les faces de réflexion 20.1.2 et 20.2.2 sont des faces arrière des pièces optiques 20.1 et 20.2 et présentent dans un plan vertical un profil légèrement courbe et convexe. Les faces de sortie 20.1.3 et 20.2.3 sont des faces avant des pièces optiques 20.1 et 20.2, adjacentes à la surface réfléchissante du collecteur 8 du système optique principal 4 (figure 1). Elles présentent dans un plan horizontal un profil courbe concave correspondant au profil du bord arrière et inférieur adjacent de la surface réfléchissante du collecteur 8 du système optique principal 4 (figure 1).THE figures 2 and 3 are two perspective views of the optical parts 20.1 and 20.2 of the first and second complementary optical systems 12 and 14 ( figure 1 ). These two optical parts are made of transparent or translucent materials and form diopters, each with an entry face, a reflection face and an exit face of the light emitted by the associated light source. Entrance faces 20.1.1 and 20.2.1 present in a vertical plane a convex curved profile arranged opposite the light sources 16 and 18 respectively. The reflection faces 20.1.2 and 20.2.2 are rear faces of the optical parts 20.1 and 20.2 and have a slightly curved and convex profile in a vertical plane. The exit faces 20.1.3 and 20.2.3 are front faces of the optical parts 20.1 and 20.2, adjacent to the reflecting surface of the collector 8 of the main optical system 4 ( figure 1 ). They present in a horizontal plane a concave curved profile corresponding to the profile of the adjacent rear and lower edge of the reflective surface of the collector 8 of the main optical system 4 ( figure 1 ).

En référence plus spécifiquement à la figure 2 montrant les faces de sortie 20.1.3 et 20.2.3, on peut observer que chacune de ces faces présente une largeur moyenne L qui est supérieure à un multiple de la hauteur moyenne H, par exemple supérieure à 5 fois la hauteur moyenne H. Le faisceau lumineux complémentaire imageant une telle face éclairée va ainsi présenter une forme correspondante, c'est-à-dire mince verticalement. Cette image va être inversée au passage du dispositif de projection 22 (figure 1). A cet effet, le bord latéral intérieur par rapport à l'axe optique (passant entre les deux pièces optiques 20.1 et 20.2, c'est-à-dire au centre la pièce optique commune 20) désigné par les signes de référence 20.1.3.1 et 20.2.3.1 est incliné par rapport à la verticale, par exemple d'un angle compris entre 45° et 75° (correspondant à une inclinaison comprise entre 45° et 15° par rapport à l'horizontale), de manière à former la coupure latérale oblique du faisceau lumineux complémentaire correspondant.With more specific reference to the figure 2 showing the exit faces 20.1.3 and 20.2.3, it can be observed that each of these faces has an average width L which is greater than a multiple of the average height H, for example greater than 5 times the average height H. complementary light beam imaging such an illuminated face will thus have a corresponding shape, that is to say vertically thin. This image will be inverted as the projection device 22 passes ( figure 1 ). For this purpose, the interior lateral edge relative to the optical axis (passing between the two optical parts 20.1 and 20.2, that is to say in the center the common optical part 20) designated by the reference signs 20.1.3.1 and 20.2.3.1 is inclined relative to the vertical, for example by an angle between 45° and 75° (corresponding to an inclination between 45° and 15° relative to the horizontal), so as to form the oblique lateral cutoff of the corresponding complementary light beam.

La figure 4 est une vue schématique en coupe longitudinale verticale du module d'éclairage de la figure 1. Pour le système optique principal 4 et le dispositif de projection, la coupe passe par l'axe optique 10 alors que pour les dispositifs optiques complémentaires 12 et 14 la coupe est décalée perpendiculairement au plan de coupe du système optique principal 4 et passe au choix par l'un desdits systèmes optiques complémentaires et la source lumineuse correspondante.There Figure 4 is a schematic view in vertical longitudinal section of the lighting module of the figure 1 . For the main optical system 4 and the projection device, the section passes through the optical axis 10 while for the complementary optical devices 12 and 14 the section is offset perpendicular to the cutting plane of the main optical system 4 and passes optionally through one of said complementary optical systems and the corresponding light source.

Au système optique principal 4, on peut observer que la source lumineuse 6 éclaire la surface réfléchissante du collecteur 8, du bord arrière inférieur 8.1 jusqu'au bord avant 8.2 de ladite surface réfléchissante. Le dispositif de projection 22 comprend un foyer 22.1 situé sur l'axe optique 10, au niveau du bord arrière inférieur 8.1 ou à une position plus en avant, cependant toujours au niveau du collecteur 8, idéalement sur une premier moitié de la longueur du collecteur suivant l'axe optique. Moyennant une certaine profondeur de champ, cela permet au dispositif de projection 22 d'imager la surface réfléchissante du collecteur 8 alors qu'elle est éclairée, où la zone de la surface réfléchissante située le long du bord arrière et inférieur 8.1 est imagée avec netteté afin de réaliser une coupure horizontale supérieure nette. Pour imager la surface réfléchissante éclairée, le système optique principal 4 incluant le dispositif de projection 22 doit être stigmatique. Un stigmatisme rigoureux est présent lorsque pour deux points l'ensemble des rayons lumineux issus d'un des points et traversant le système forment d'autres rayons lumineux dont les supports passent par le second point. En pratique, il s'agira plutôt d'un stigmatisme dit approché, obtenu notamment en se plaçant dans les conditions de Gauss. Celles-ci prévoient que les angles d'incidence des rayons par rapport à l'axe optique de l'élément sont faibles, typiquement inférieurs ou égaux à 20°, et/ou que le point d'incidence est proche de l'axe optique. A cet effet, le dispositif optique 22 présente avantageusement une distance focale importante, plus avantageusement encore une ouverture géométrique importante. A titre d'exemple, la distance focale est supérieure à 40mm, préférentiellement supérieure à 50mm, plus préférentiellement encore supérieure à 60mm. La distance focale est avantageusement inférieure à 100m.At the main optical system 4, it can be observed that the light source 6 illuminates the reflective surface of the collector 8, from the lower rear edge 8.1 to the front edge 8.2 of said reflective surface. The projection device 22 comprises a focus 22.1 located on the optical axis 10, at the level of the lower rear edge 8.1 or at a position further forward, however still at the level of the collector 8, ideally over a first half of the length of the collector along the optical axis. With a certain depth of field, this allows the projection device 22 to image the reflective surface of the collector 8 while it is illuminated, where the area of the reflective surface located along the rear and lower edge 8.1 is imaged with clarity in order to achieve a clear upper horizontal cut. To image the illuminated reflective surface, the main optical system 4 including the projection device 22 must be stigmatic. A rigorous stigmatism is present when for two points all the light rays coming from one of the points and crossing the system form other light rays whose supports pass through the second point. In practice, it will rather be a so-called approximate stigmatism, obtained in particular by placing oneself in Gauss's conditions. These provide that the angles of incidence of the rays relative to the optical axis of the element are low, typically less than or equal to 20°, and/or that the point of incidence is close to the optical axis . For this purpose, the optical device 22 advantageously has a large focal length, more advantageously still a large geometric aperture. For example, the focal length is greater than 40mm, preferably greater than 50mm, even more preferably greater than 60mm. The focal length is advantageously less than 100m.

Au système optique complémentaire 12 ou 14, on peut observer le parcours des rayons émis par la source lumineuse correspondante 16 ou 18. Ceux-ci sont potentiellement réfractés au dioptre formé par la face d'entrée 20.1.1 ou 20.2.1, ensuite ils sont réfléchis par la face de réflexion 20.1.2 ou 20.2.2, avantageusement par le principe de réflexion totale lorsque l'ange d'incidence est supérieur à l'angle limite de réfraction, et ensuite potentiellement réfractés au passage du dioptre formé par la face de sortie 20.1.3 ou 20.2.3 formant alors une surface éclairée. Cette surface éclairée est avantageusement adjacente à l'axe optique 10 et au bord arrière inférieur 8.1 de la surface réfléchissant du collecteur 8. De ce fait, la surface éclairée 20.1.3 ou 20.2.3 est adjacente au foyer 22.1 du dispositif de projection 22, ou du moins proche de celui-ci. Cette surface éclairée est alors imagée avec netteté, ce qui permet de réaliser un faisceau lumineux complémentaire avec des coupures nettes.At the complementary optical system 12 or 14, the path of the rays emitted by the corresponding light source 16 or 18 can be observed. These are potentially refracted at the diopter formed by the entrance face 20.1.1 or 20.2.1, then they are reflected by the reflection face 20.1.2 or 20.2.2, advantageously by the principle of total reflection when the angel of incidence is greater than the limiting angle of refraction, and then potentially refracted as the diopter formed by the exit face 20.1.3 or 20.2.3 then forming an illuminated surface. This illuminated surface is advantageously adjacent to the optical axis 10 and to the lower rear edge 8.1 of the reflecting surface of the collector 8. As a result, the illuminated surface 20.1.3 or 20.2.3 is adjacent to the focus 22.1 of the projection device 22 , or at least close to it. This illuminated surface is then imaged clearly, this which makes it possible to create a complementary light beam with clear cuts.

La figure 5 illustre le collecteur 8 du système optique principal 4 (figures 1 et 4). La vue de gauche est une vue en perspective montrant la forme de calotte du collecteur, avantageusement avec un profil elliptique ou parabolique, avantageusement de révolution, du moins en première approximation, autour d'un axe correspondant à l'axe optique 10. La vue de droite montre la surface réfléchissante lorsqu'elle est éclairée par la source lumineuse, vue depuis l'avant du dispositif de projection 22 (figures 1 et 4). Celui-ci provoque en effet une inversion de l'image, expliquant que l'image du bord arrière inférieur 8.1 de la surface réfléchissante forme en fait le bord horizontal supérieur de l'image projetée. Similairement, le bord avant 8.2 de la surface réfléchissante forme le bord inférieur de l'image projetée. On peut observer que la lumière se concentre au milieu de la surface, à proximité du bord arrière inférieur. En référence avec la figure 4, le fait que le foyer 22.1 du dispositif de projection soit sur l'axe optique et proche du, ou adjacent au bord arrière inférieur 8.1 de la surface réfléchissante du collecteur 8 fait que la partie centrale de la surface réfléchissante, proche dudit bord, sera imagée avec davantage de netteté. Dans ces conditions, la coupure horizontale supérieure du faisceau lumineux principal sera plus nette au centre que sur les côtés.There figure 5 illustrates the collector 8 of the main optical system 4 ( figures 1 And 4 ). The view on the left is a perspective view showing the shape of the cap of the collector, advantageously with an elliptical or parabolic profile, advantageously of revolution, at least in first approximation, around an axis corresponding to the optical axis 10. The view on the right shows the reflective surface when illuminated by the light source, seen from the front of the projection device 22 ( figures 1 And 4 ). This in fact causes an inversion of the image, explaining that the image of the lower rear edge 8.1 of the reflective surface in fact forms the upper horizontal edge of the projected image. Similarly, the front edge 8.2 of the reflective surface forms the lower edge of the projected image. It can be observed that the light is concentrated in the middle of the surface, near the bottom rear edge. In reference to the figure 4 , the fact that the focus 22.1 of the projection device is on the optical axis and close to, or adjacent to the lower rear edge 8.1 of the reflective surface of the collector 8 means that the central part of the reflective surface, close to said edge, will be imaged with greater clarity. Under these conditions, the upper horizontal cutoff of the main light beam will be sharper in the center than on the sides.

La figure 6 illustre de manière schématique les images des faisceaux lumineux principaux et complémentaires. L'axe H correspond à la direction horizontale passant par l'axe optique et l'axe V correspond à la direction verticale passant également par l'axe optique.There Figure 6 schematically illustrates the images of the main and complementary light beams. The H axis corresponds to the horizontal direction passing through the optical axis and the V axis corresponds to the vertical direction also passing through the optical axis.

L'image du faisceau lumineux principal 26 comprend une coupure horizontale supérieure 26.1 généralement plate ou droite. Elle est formée par l'image du bord arrière et inférieur 8.1 de la surface réfléchissante du collecteur 8 du système optique principal 4 (figures 4 et 5). Il est toutefois à noter que cette coupure horizontale supérieure 26.1 pourrait présenter un profil non-plat dès lors que le bord arrière inférieur 8.1 de la surface réfléchissante du collecteur 8 n'est pas plan. L'image du faisceau lumineux principal 26 comprend une coupure inférieure 26.2 en forme de U, moins nette que la coupure horizontale supérieure 26.1, formée par le bord avant 8.2 de la surface réfléchissante du collecteur 8 (figures 4 et 5).The image of the main light beam 26 includes an upper horizontal cutoff 26.1 that is generally flat or straight. It is formed by the image of the rear and lower edge 8.1 of the reflecting surface of the collector 8 of the main optical system 4 ( figures 4 and 5 ). It should be noted, however, that this upper horizontal cutoff 26.1 could have a non-flat profile since the lower rear edge 8.1 of the reflective surface of the collector 8 is not planar. The image of the main light beam 26 includes a lower U-shaped cutoff 26.2, less sharp than the upper horizontal cutoff 26.1, formed by the front edge 8.2 of the reflecting surface of the collector 8 ( figures 4 and 5 ).

L'image du premier faisceau lumineux complémentaire 28, située à droite de l'axe optique 10 (au croisement des axes H et V), est produite par le premier système optique complémentaire 12 (figure 1) situé à gauche de l'axe optique. On peut observer la coupure latérale oblique 28.1 adjacente à l'axe optique 10, la coupure latérale extérieure 28.2 et les coupures horizontales supérieure 28.3 et inférieure 28.4. Ces quatre coupures sont formées par les bords latéraux, supérieur et inférieur de la surface éclairée formée par la face de sortie 20.1.3 du dioptre correspondant 20.1 (figure 2) étant entendu qu'il y a une inversion de l'image, correspondant à une rotation de 180° autour de l'axe optique 10. Similairement, l'image du deuxième faisceau lumineux complémentaire 30, située à gauche de l'axe optique 10, est produite par le deuxième système optique complémentaire 14 (figure 1) situé à droite de l'axe optique. Elle comprend similairement une coupure latérale oblique 30.1 adjacente à l'axe optique 10, une coupure latérale extérieure 30.2 et des coupures horizontales supérieure 30.3 et inférieure 30.4.The image of the first complementary light beam 28, located to the right of the optical axis 10 (at the intersection of the H and V axes), is produced by the first complementary optical system 12 ( figure 1 ) located to the left of the optical axis. We can observe the oblique lateral cutoff 28.1 adjacent to the optical axis 10, the exterior lateral cutoff 28.2 and the upper horizontal cuts 28.3 and lower 28.4. These four cuts are formed by the lateral, upper and lower edges of the illuminated surface formed by the exit face 20.1.3 of the corresponding diopter 20.1 ( figure 2 ) it being understood that there is an inversion of the image, corresponding to a rotation of 180° around the optical axis 10. Similarly, the image of the second complementary light beam 30, located to the left of the optical axis 10, is produced by the second complementary optical system 14 ( figure 1 ) located to the right of the optical axis. It similarly comprises an oblique lateral cutoff 30.1 adjacent to the optical axis 10, an exterior lateral cutoff 30.2 and upper 30.3 and lower horizontal cuts 30.4.

La combinaison du faisceau lumineux principal 28 avec le premier faisceau lumineux complémentaire 28 correspond à une fonction d'éclairage à coupure dite « code » (« low-beam » en anglais) pour conduite à droite suivant la réglementation en vigueur notamment en Europe. Similairement, la combinaison du faisceau lumineux principal 26 avec le deuxième faisceau lumineux complémentaire 30 correspond à une fonction d'éclairage à coupure dite « code » (« low-beam » en anglais) pour conduite à gauche suivant la même réglementation. Le faisceau lumineux principal 26 seul peut correspondre à une fonction d'éclairage à coupure dite « code » (« low-beam » en anglais) suivant la réglementation en vigueur aux Etats-Unis d'Amérique.The combination of the main light beam 28 with the first complementary light beam 28 corresponds to a so-called “code” cut-off lighting function (“low-beam” in English) for right-hand driving according to the regulations in force in particular in Europe. Similarly, the combination of the main light beam 26 with the second complementary light beam 30 corresponds to a so-called “code” cut-off lighting function (“low-beam” in English) for left-hand driving following the same regulations. The main light beam 26 alone can correspond to a so-called “code” cut-off lighting function (“low-beam” in English) according to the regulations in force in the United States of America.

Les figures 7 et 8 illustrent un module d'éclairage selon un deuxième mode de réalisation de l'invention. Les numéros de référence du premier mode de réalisation sont utilisés pour désigner les éléments identiques ou correspondants, ces numéros étant toutefois majorés de 100. Il est par ailleurs fait référence à la description de ces éléments en relation avec le premier mode de réalisation. Des numéros spécifiques compris entre 100 et 200 sont utilisés pour désigner les éléments spécifiques.THE figures 7 and 8 illustrate a lighting module according to a second embodiment of the invention. The reference numbers of the first embodiment are used to designate identical or corresponding elements, these numbers being however increased by 100. Reference is also made to the description of these elements in relation to the first embodiment. Specific numbers between 100 and 200 are used to designate specific items.

La figure 7 illustre en perspective et de manière schématique un module d'éclairage 102 similaire à celui du premier mode de réalisation. Il s'en distingue essentiellement par la construction des systèmes optiques complémentaires 112 et 114 dont les pièces optiques 120.1 et 120.2 ne sont plus des pièces dioptriques mais bien des réflecteurs. Similairement au premier mode de réalisation, le système optique principal 104 produit un faisceau lumineux principal avec une coupure horizontale supérieure, préférentiellement plate, et les systèmes optiques complémentaires 112 et 114 produisent des faisceaux lumineux complémentaires situés à droite et à gauche de l'axe optique, respectivement, avec une coupure latérale oblique adjacente à l'axe optique.There Figure 7 illustrates in perspective and schematically a lighting module 102 similar to that of the first embodiment. It stands out essentially by the construction of complementary optical systems 112 and 114, the optical parts 120.1 and 120.2 of which are no longer dioptric parts but reflectors. Similar to the first embodiment, the main optical system 104 produces a main light beam with an upper horizontal cutoff, preferably flat, and the complementary optical systems 112 and 114 produce complementary light beams located to the right and left of the optical axis. , respectively, with an oblique lateral cutoff adjacent to the optical axis.

La figure 8 est une vue en perspective du système optique principal 104 et des premier et deuxième systèmes optiques complémentaires 112 et 114 respectivement.There figure 8 is a perspective view of the main optical system 104 and the first and second complementary optical systems 112 and 114 respectively.

Le collecteur 108 du système optique principal 104 comprend une surface réfléchissante en forme de calotte avec un bord arrière inférieur 108.1 adjacent à l'axe optique 110 et un bord avant 108.2 qui correspond en l'occurrence à une troncature de la calotte par un plan supérieur proche d'une orientation horizontale. La source lumineuse 106 est configurée pour éclairer cette surface réfléchissante, celle-ci étant imagée par le dispositif de projection 122 (figure 1) pour former le faisceau principal avec une coupure horizontale supérieure formée par l'image essentiellement nette du bord arrière inférieur 108.1 de la surface réfléchissante en question. L'image plus ou moins nette du bord avant 108.2 forme alors la limite inférieure du faisceau lumineux principal. Les réflecteurs 120.1 et 120.2 formant les pièces optiques des premier et deuxième systèmes optiques complémentaires 112 et 114 sont adjacents au bord arrière inférieur 108.1 de la surface réfléchissante du collecteur 108 du système optique principal 104. Chacun des réflecteurs 120.1 et 120.2 comprend une première surface réfléchissante 120.1.1 ou 120.2.1 s'étendant essentiellement horizontalement depuis le bord arrière inférieur 108.1 de la surface réfléchissante du collecteur 108 du système optique principal 104, et une deuxième surface réfléchissante 120.1.2 ou 120.2.2 s'étendant essentiellement verticalement depuis la première surface réfléchissante 120.1.1 ou 120.2.1. Chacune des deuxièmes surfaces réfléchissantes 120.1.2 ou 120.2.2 présente dans un plan horizontal un profil courbe concave de plus grand rayon moyen que le bord arrière et inférieur 108.1 de la surface réfléchissante du collecteur 108 du système optique principal 104. Les réflecteurs 120.1 et 120.2 sont configurés pour collecter la lumière émise par les sources lumineuses 116 et 118 respectivement de manière à éclairer les deuxième surfaces réfléchissantes 120.1.2 et 120.2.2 respectivement. Celles-ci sont comparables aux surfaces éclairées des dioptres 20.1 et 20.2 du premier mode de réalisation formées par les faces de sorties 20.1.3 et 20.2.3 desdits dioptres (voir figure 2). Chacune des deuxièmes surfaces réfléchissantes 120.1.2 ou 120.2.2 s'étend horizontalement avec une largeur moyenne L supérieure à un multiple, par exemple 5 ou 10, à la hauteur moyenne H. Chacune de ces surfaces présente un bord latéral incliné 120.1.2.1 ou 120.2.2.1 adjacent à l'axe optique 110, de manière à former un bord de coupure latéral oblique du faisceau lumineux complémentaire correspondant. Similairement au premier mode de réalisation, le dispositif de projection 122 image ces surfaces réfléchissantes éclairées pour former les faisceaux lumineux complémentaires similaires aux faisceaux lumineux complémentaires 28 et 30 du premier mode de réalisation (figure 6).The collector 108 of the main optical system 104 comprises a reflective surface in the form of a cap with a lower rear edge 108.1 adjacent to the optical axis 110 and a front edge 108.2 which corresponds in this case to a truncation of the cap by a higher plane close to a horizontal orientation. The light source 106 is configured to illuminate this reflective surface, the latter being imaged by the projection device 122 ( figure 1 ) to form the main beam with an upper horizontal cutoff formed by the essentially sharp image of the lower rear edge 108.1 of the reflective surface in question. The more or less clear image of the front edge 108.2 then forms the lower limit of the main light beam. The reflectors 120.1 and 120.2 forming the optical parts of the first and second complementary optical systems 112 and 114 are adjacent to the lower rear edge 108.1 of the reflective surface of the collector 108 of the main optical system 104. Each of the reflectors 120.1 and 120.2 comprises a first reflective surface 120.1.1 or 120.2.1 extending essentially horizontally from the lower rear edge 108.1 of the reflective surface of the collector 108 of the main optical system 104, and a second reflective surface 120.1.2 or 120.2.2 extending essentially vertically from the first reflective surface 120.1.1 or 120.2.1. Each of the second reflective surfaces 120.1.2 or 120.2.2 has in a horizontal plane a concave curved profile of greater average radius than the rear and lower edge 108.1 of the reflective surface of the collector 108 of the optical system main 104. The reflectors 120.1 and 120.2 are configured to collect the light emitted by the light sources 116 and 118 respectively so as to illuminate the second reflective surfaces 120.1.2 and 120.2.2 respectively. These are comparable to the illuminated surfaces of the diopters 20.1 and 20.2 of the first embodiment formed by the output faces 20.1.3 and 20.2.3 of said diopters (see figure 2 ). Each of the second reflective surfaces 120.1.2 or 120.2.2 extends horizontally with an average width L greater than a multiple, for example 5 or 10, of the average height H. Each of these surfaces has an inclined lateral edge 120.1.2.1 or 120.2.2.1 adjacent to the optical axis 110, so as to form an oblique lateral cut-off edge of the corresponding complementary light beam. Similar to the first embodiment, the projection device 122 images these illuminated reflective surfaces to form complementary light beams similar to the complementary light beams 28 and 30 of the first embodiment ( Figure 6 ).

De manière générale, c'est-à-dire notamment pour les deux modes de réalisation, la source lumineuse du système optique principal et les sources lumineuses des systèmes optiques complémentaires peuvent être disposées sur un support commun, en raison de leur proximité et du fait qu'elles éclairent toutes dans la même direction.In general, that is to say in particular for the two embodiments, the light source of the main optical system and the light sources of the complementary optical systems can be arranged on a common support, due to their proximity and the fact that they all shine in the same direction.

A la lumière de ce qui précède, on comprend que les systèmes optiques complémentaires peuvent prendre diverses formes, dès lors qu'ils sont configurés pour former des faisceaux complémentaires alternatifs avec coupures latérales obliques opposées aptes à former avec le faisceau lumineux principal à coupure horizontale supérieure, avantageusement de profil plat, une coupure horizontale supérieure avec un ressaut au centre, conformément à la réglementation en vigueur notamment en Europe.In light of the above, it is understood that the complementary optical systems can take various forms, as long as they are configured to form alternative complementary beams with opposite oblique lateral cutoffs capable of forming with the main light beam with upper horizontal cutoff , advantageously of flat profile, an upper horizontal cut with a projection in the center, in accordance with the regulations in force particularly in Europe.

A la lumière de ce qui précède, on comprend également que le système optique principal peut également prendre diverses formes, pour autant qu'il produise un faisceau lumineux à coupure horizontale supérieure, avantageusement plate.In light of the above, we also understand that the main optical system can also take various forms, as long as it produces a light beam with a higher horizontal cutoff, advantageously flat.

L'invention qui vient d'être décrite est avantageuse en ce qu'elle permet de réaliser un seul module d'éclairage pour une fonction d'éclairage à coupure du type « code » (ou « low-beam » en anglais) compatible pour différentes réglementations, comme la réglementation européenne avec ressaut spécifique pour conduite à gauche et conduite à droite, et la réglementation américaine sans ressaut. La mise en conformité avec la réglementation à respecter se fait alors par activation spécifique d'un ou d'aucun des systèmes optiques complémentaires.The invention which has just been described is advantageous in that it makes it possible to produce a single lighting module for a “code” type cut-off lighting function (or “low-beam” in English) compatible for different regulations, such as European regulations with specific jump for left-hand and right-hand driving, and American regulations without jump. Compliance with the regulations to be respected is then done by specific activation of one or none of the complementary optical systems.

Claims (12)

  1. A lighting module (2; 102), in particular for a motor vehicle, comprising:
    - a main optical system (4; 104) able to form a main light beam (26) along an optical axis (10; 110) of the lighting module, with an upper horizontal cut-off (26.1);
    - a first complementary optical system (12; 112) able to form a first complementary light beam (28) along the optical axis (10; 110), narrower than the main light beam (26) and with an oblique lateral cut-off (28.1);
    - a second complementary optical system (14; 114) able to form an alternative, second complementary light beam (30) along the optical axis (10; 110), narrower than the main light beam (26) and with an oblique lateral cut-off (30.1) opposite the oblique lateral cut-off (28.1) of the first complementary light beam (28)
    characterized in that each of the first and second complementary optical systems (12, 14; 112, 114) comprises a light source (16, 18; 116, 118) and an optical element (20.1, 20.2; 120.1, 120.2) with a surface able to be illuminated (20.1.3, 20.2.3; 120.1.2, 120.2.2) by said light source, the optical element (20.1, 20.2) of each of the first and second complementary optical systems (12, 14) is a diopter with an inlet face (20.1.1,20.2.1) of the light emitted by the corresponding light source (16, 18), a reflecting face (20.1.2, 20.2.2) of said light, and an outlet face (20.1.3, 20.2.3) of said light, forming the surface able to be illuminated, or the optical element (120.1, 120.2) of each of the first and second complementary optical systems (112, 114) comprises a reflective surface (120.1.2, 120.2.2) forming the surface able to be illuminated,
    and in that the lighting module comprises a lens (22; 122) for projecting the first and second complementary light beams (28, 30), which is configured to form an image of the illuminated surface (20.1.3, 20.2.3; 120.1.2, 120.2.2) of the optical element (20.1, 20.2; 120.1, 120.2) of each of the first and second optical systems (12, 14; 112, 114).
  2. The lighting module (2; 102) as claimed in claim 1, characterized in that the oblique lateral cut-offs (28.1, 30.1) of the first and second complementary light beams (28, 30) are adjacent to the optical axis (10; 110), the first complementary light beam (28) extending exclusively to the right of said optical axis (10; 110) and the second complementary light beam (30) extending exclusively to the left of said optical axis (10, 110).
  3. The lighting module (2; 102) as claimed in one of claims 1 and 2, characterized in that the lighting module is configured such that the first and second optical systems (12, 14; 112, 114) are only active alternatively.
  4. The lighting module (2; 102) as claimed in any of claims 1 to 3, characterized in that each of the first and second complementary light beams (28, 30) also has an upper horizontal cut-off (28.3, 30.3) and/or a lower horizontal cut-off (28.4, 30.4).
  5. The lighting module (2; 102) as claimed in in any of claims 1 to 4, characterized in that the surfaces able to be illuminated (20.1.3, 20.2.3; 120.1.2, 120.2.2) of the first and second complementary optical systems (12, 14; 112, 114) are arranged laterally on either side of the optical axis (10; 110).
  6. The lighting module (2; 102) as claimed in any of claims 1 to 5, characterized in that the surfaces able to be illuminated (20.1.3, 20.2.3; 120.1.2, 120.2.2) of the first and second complementary optical systems (12, 14; 112, 114) are arranged below the optical axis (10; 110).
  7. The lighting module (2; 102) as claimed in any of claims 1 to 6, characterized in that each of the surfaces able to be illuminated (20.1.3, 20.2.3; 120.1.2, 120.2.2) of the first and second complementary optical systems (12, 14; 112, 114) has a mean height H and a mean width L greater than 5 times said mean height H.
  8. The lighting module (2; 102) as claimed in any of claims 1 to 7, characterized in that each of the surfaces able to be illuminated (20.1.3, 20.2.3; 120.1.2, 120.2.2) of the first and second complementary optical systems (12, 14; 112, 114) comprises an inclined lateral edge (20.1.3.1, 20.2.3.1; 120.1.2.1, 120.2.2.1) able to form the oblique lateral cut-off (28.1, 30.1) of the corresponding complementary light beam (58, 30).
  9. The lighting module (2; 102) as claimed in claim 8, characterized in that the inclined lateral edges (20.1.3.1, 20.2.3.1; 120.1.2.1, 120.2.2.1) of the surfaces able to be illuminated (20.1.3, 20.2.3; 120.1.2, 120.2.2) of the first and second complementary optical systems (12, 14; 112, 114) are adjacent to the optical axis (10; 110) and arranged laterally on either side of said optical axis.
  10. The lighting module (2; 102) as claimed in any of claims 1 to 9, characterized in that the main optical system (4; 104) comprises a light source (6; 106) with a main direction of emission of light beams which is directed upward, and a collector (8; 108) with a reflective surface in the form of a cap able to receive the light beams and with a lower rear edge (8.1, 108.1) adjacent to the optical axis (10; 110).
  11. The lighting module (2; 102) as claimed in claim 10, characterized in that the surfaces able to be illuminated (20.1.3, 20.2.3; 120.1.2, 120.2.2) of the first and second complementary optical systems (12, 14; 112, 114) are adjacent to the lower rear edge (8.1; 108.1) of the reflective surface of the collector (8; 108).
  12. The lighting module (2; 102) as claimed in claim 11, characterized in that the projection device (22; 122) comprises a focal point (22.1; 22.1) situated on the optical axis (10; 110) at the level of the lower rear edge (8.1; 108.1) of the reflective surface of the collector (8; 108) or in front of said edge.
EP20789992.3A 2019-10-29 2020-10-14 Headlamp adjustable between left-hand drive and right-hand drive Active EP4051954B1 (en)

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FR1912144A FR3102535B1 (en) 2019-10-29 2019-10-29 MODULAR AUTOMOTIVE HEADLIGHT BETWEEN LEFT-HAND DRIVE AND RIGHT-HAND DRIVE
PCT/EP2020/078940 WO2021083671A1 (en) 2019-10-29 2020-10-14 Motor vehicle headlight that can be modularised between right-hand drive and left-hand drive

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US20230034372A1 (en) 2023-02-02
FR3102535B1 (en) 2022-07-08

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