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EP3575675B1 - Lighting module forming a cut-off line with a two zones reflector - Google Patents

Lighting module forming a cut-off line with a two zones reflector Download PDF

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Publication number
EP3575675B1
EP3575675B1 EP19176612.0A EP19176612A EP3575675B1 EP 3575675 B1 EP3575675 B1 EP 3575675B1 EP 19176612 A EP19176612 A EP 19176612A EP 3575675 B1 EP3575675 B1 EP 3575675B1
Authority
EP
European Patent Office
Prior art keywords
module
lateral
zone
cut
zones
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
EP19176612.0A
Other languages
German (de)
French (fr)
Other versions
EP3575675A1 (en
Inventor
Sylvain Giraud
Blaise Jars
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
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3575675A1 publication Critical patent/EP3575675A1/en
Application granted granted Critical
Publication of EP3575675B1 publication Critical patent/EP3575675B1/en
Active legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—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]
    • F21S41/155—Surface emitters, e.g. organic light emitting diodes [OLED]
    • 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
    • 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 invention relates to the field of lighting, more particularly lighting for motor vehicles.
  • the published patent document EP 2 309 172 A1 discloses a light projector for a motor vehicle, comprising a light module capable of producing a light beam with horizontal cut-off, corresponding to the lighting function commonly called "code" in French, or "low beam” in English.
  • the module comprises a reflecting surface of the parabolic type comprising several zones capable, from the light emitted by the light source towards the reflecting surface, of forming different specific light images and superimposing themselves to form the light beam.
  • the central zone which intersects with the optical axis and the light emission axis of the light source is configured to form a light image with horizontal cut-off, while the lateral zones and adjacent to the central zone form a light image with an oblique cut-off.
  • Such a configuration makes it possible to form several specific light images with a single module, more particularly a single light source and a single reflecting surface. This has the advantage of compactness.
  • this configuration imposes certain geometric constraints on the narrow central area in order to be able to form the horizontal cut-off light image, which then imposes significant variations in the radius of curvature for the adjacent lateral areas.
  • the sharpness of the oblique cut-off of the oblique cut-off light image may prove deficient, essentially in that the inclination of the cut-off is ensured by a particular configuration at the lateral areas of the reflecting surface, both at the level of the radius of curvature in a longitudinal plane and at the level of the radius of curvature in a transverse plane.
  • the invention aims to overcome at least one of the drawbacks of the aforementioned state of the art. More particularly, the invention aims to propose a light module capable of forming a cut-off lighting beam horizontal which provides more flexibility in the light image produced while remaining compact. More particularly, the invention aims to propose a light module capable of forming a horizontal cut-off lighting beam with a sharper oblique kink.
  • the invention relates to a light module for a motor vehicle as defined in claim 1 and comprising a semiconductor light source with a generally flat illuminating surface capable of emitting light along an emission axis perpendicular to said plane; a reflection surface capable of reflecting at least part of the light emitted by the light source so as to form, along an optical axis, a cut-off light beam, and comprising a central zone intersected by the optical axis and the emission axis; and at least one zone lateral to the central zone; said zones being configured to form specific light images forming the cut-off light beam; the or at least one of the lateral zones being configured to form a horizontal cut-off light image.
  • the emission axis of the illuminating surface is perpendicular to the optical axis.
  • the light source comprises, in the plane of the emission surface, at least one emission edge, preferably generally rectilinear, transverse to the optical axis.
  • the emission edge located towards the front when the reflection surface is located under the light source, or located towards the rear when the reflection surface is located above the light source, makes it possible to ensure a horizontal and/or oblique cutoff of the light beam.
  • the central zone is configured to form a light image with an inclined cut-off.
  • the lateral zone(s) configured to form the horizontal cut-off light image is or are adjacent to the central zone and on one side or on either side, respectively, relative to the optical axis, of said zone.
  • the central zone is configured to form a luminous diffusion image below the horizontal, more extensive than the other luminous images.
  • the lateral zone configured to form the luminous image with horizontal cut-off is a first lateral zone adjacent to the central zone, the lateral zones comprising a second lateral zone adjacent to the central zone, opposite the first adjacent lateral zone relative to the optical axis, the second adjacent lateral zone being configured to form a luminous image with inclined cut-off.
  • the light source comprises, in the plane of the emission surface, an emission edge and is inclined so that said edge forms an angle ⁇ with a perpendicular to the optical axis and to the emission axis.
  • the angle ⁇ is greater than or equal to 10° and less than or equal to 45°, preferably greater than or equal to 15° and less than or equal to 35°.
  • the light image with inclined cut-off has an inclination relative to a horizontal direction which corresponds to the angle ⁇ .
  • the light image with inclined cut-off has an inclination ⁇ relative to a horizontal direction which is different from the angle ⁇ .
  • the lateral zones further comprise at least one extra-lateral zone adjacent to the or one of the lateral zones adjacent to the central zone.
  • the at least one extra-lateral zone is configured to form a luminous diffusion image below the horizontal, more extensive than the other luminous images.
  • the at least one extra-lateral zone corresponds to the lateral zones configured to form the light image with horizontal cut-off.
  • the central zone has longitudinal edges adjacent to the lateral zones, said edges being inclined at an angle ⁇ relative to the optical axis.
  • the angle ⁇ is greater than or equal to 5° and/or less than or equal to 20°.
  • the angle ⁇ is greater than or equal to 10°.
  • the reflecting surface is of the parabolic type.
  • the invention also relates to a projector comprising a housing forming an opening, a glass for closing the opening, and at least one light module, remarkable in that the at least one light module conforms to the invention.
  • the measures of the invention are interesting in that they make it possible to use more surface area to achieve the horizontal cut-off of the light beam, and thus to concentrate the light rays at and directly below the cut-off. They also make it possible, by means of an inclination of the light source, to achieve a particularly sharp and robust oblique cut-off in that the cut-off is less sensitive to manufacturing tolerances of the light module and to possible deformations of the relevant area of the reflecting surface. They also provide greater freedom with regard to the arrangement of the areas, in particular for producing light images with horizontal cut-off, oblique cut-off and diffuse.
  • FIG. 1 illustrates a headlight for a motor vehicle, in accordance with the invention, comprising a light module also in accordance with the invention, according to any one of the embodiments.
  • FIG. 1 illustrates a motor vehicle headlight 2, essentially comprising a housing 4 forming an opening covered by a glass 6.
  • the housing 4 of the headlight 2 contains a light module 8 capable of forming a light beam with horizontal cut-off and optionally with an oblique part, corresponding to a lighting beam commonly referred to as "code” or "low-beam” in English.
  • the light module 8 essentially comprises a support 10, a light source 12 and a reflecting surface 14.
  • the latter is advantageously of the parabolic type, that is to say, generally speaking, a surface having a single focus, that is to say a zone of convergence of the light rays such that the light rays emitted by the light source placed at the level of this zone of convergence are projected at a great distance after reflection on the surface. Projected at a great distance means that these light rays do not converge towards an area located at least 10 times the dimensions of the reflector. In other words, the reflected rays do not converge to a convergence zone or, if they converge, this convergence zone is located at a distance greater than or equal to 10 times the dimensions of the reflector.
  • a parabolic surface may or may not have parabolic portions.
  • a reflector with such a surface is generally used alone to create a light beam.
  • the reflective surface 14 is configured to reflect the light rays emitted by the light source 12, along the optical axis 16.
  • the projector may comprise another light module, in this case located under the light module 8, in particular configured to form, with the light module 8, an uninterrupted light beam, commonly referred to as “road” or “high-beam” in English.
  • FIG. 2 illustrates in perspective the reflective surface and the light source of the light module of the projector of the figure 1 . It applies to all embodiments, it being understood that for the sixth embodiment the angle ⁇ mentioned in the description of this figure is equal to 0.
  • FIG 2 illustrates in perspective the light source 12 and the reflective surface 14 of the light module of the figure 1 .
  • the reflecting surface 14 is subdivided into several zones 14.1-14.5 extending essentially longitudinally, that is to say along the optical axis 16, and arranged side by side laterally.
  • these different zones are configured to form, from the same light source 12, different light images which, superimposed, will form the light beam.
  • these zones although advantageously generally parabolic, have specific surfaces in that they are deformed relative to portions of the parabolic surface of revolution, depending on the light image that they must form.
  • the light source 12 is a semiconductor and has a generally flat illuminating surface provided with a front edge 12.1 and a rear edge 12.2.
  • the front edge 12.1 is advantageously rectilinear and is capable of forming with the reflecting surface 14 the horizontal cutoff of the light beam.
  • the illuminating surface is advantageously generally rectangular and has a main axis 12.3 parallel to the front and rear edges 12.1 and 12.2. It can be observed that the source light source 12 is inclined so that its main axis 12.3 forms an angle ⁇ with a direction 18 perpendicular to the optical axis 16. This direction 18 and the main axis 12.3 of the light source 12 are advantageously in a horizontal plane when the light module is in the mounting position, as illustrated in FIG. figure 1 .
  • the angle ⁇ can be greater than or equal to 10° and/or less than or equal to 45°. In this case it is of the order of 15°.
  • the angle ⁇ represented in the figure 2 (also at the figure 3 ) is exaggerated for the sake of clarity of exposition.
  • FIGS. 3 and 4 illustrate somewhat schematically the functions of the different zones 14.1-14.5 of the reflecting surface 14.
  • the hatching on these zones at the figure 3 and the hatching on the light images at the figure 4 correspond, that is, the area(s) covered by one type of hatching form a light image represented by the same type of hatching.
  • the central zone 14.1 is intersected by the optical axis 16 as well as by the emission axis 12.4 of the light source 12, this axis being perpendicular to the plane of the illuminating surface of said source.
  • This zone is configured to form the light image 20.1 with oblique cutoff at the figure 4 .
  • the angle ⁇ of inclination of the light source 12 corresponds to the angle of inclination of the oblique cut-off.
  • the front emission edge 12.1 of the light source 12 then forms the oblique cut-off.
  • the central zone 14.1 is then a surface portion, advantageously of the parabolic type, somewhat deformed to form an image that is more concentrated vertically and horizontally and also laterally offset.
  • Such adaptations of surface portions can be carried out by those skilled in the art, in particular by commercially available digital means, provided that the operating conditions as described above are known.
  • the lateral zones 14.2 and 14.3, adjacent to the central zone 14.1, and on either side of the optical axis 16, are configured to form the luminous image 20.2 with horizontal cut-off.
  • This is a vertically concentrated image, extended horizontally and having a horizontal cut-off edge located just below the horizontal axis H.
  • These adjacent lateral zones 14.2 and 14.3 are then deformed, in particular with respect to a parabolic surface of revolution, in particular so as to vertically concentrate the reflected light rays. They must also correct the inclination ⁇ of the front emission edge 12.1 in order to form an image of said horizontal edge, corresponding to the cut-off edge of the light beam 20.
  • the extra-lateral zones 14.4 and 14.5, adjacent to the adjacent lateral zones 14.2 and 14.3, are configured to form a diffuse image 20.3, located below the horizontal axis H.
  • This arrangement of the functional areas of the reflective surface thus makes it possible to use more surface area to form the horizontal cut-off and thus to make this image brighter.
  • the inclination of the light source also makes it possible to achieve a sharper oblique cut-off.
  • FIGS. 5 and 6 illustrate a second embodiment of the invention.
  • the reference numbers of the first embodiment are used to designate identical or corresponding elements, these numbers being increased by 100. Reference is also made to the description of these elements in the context of the first embodiment.
  • the configuration of the reflective surface 114 at the figure 5 is similar to that at the figure 3 of the first embodiment.
  • the reflective surface 114 is however distinguished from the reflective surface 14 ( figure 3 ) in that the central zone 114.1 is configured to form a light image 120.1 with an oblique cut-off of a different shape, namely in the form of a parallelogram inclined at an angle ⁇ potentially different from the angle ⁇ of inclination of the light source 112.
  • the overall light image 120 thus formed thus has a Z cut-off unlike the light image 20 ( figure 4 ) of the first embodiment which has a V-shaped cut.
  • FIGS. 7 and 8 illustrate a third 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 200. Reference is also made to the description of these elements in the context of the first embodiment.
  • the reflective surface 214 is distinguished from the reflective surface 14 of the first embodiment ( figure 3 ) essentially in that the central zone 214.1 is inclined by an angle ⁇ relative to the optical axis 216, greater than or equal to 5° and/or less than or equal to 20°, advantageously greater than or equal to 10°.
  • the boundaries between the adjacent lateral zones 214.2 and 214.3 and the central zone 214.1 are thus inclined by the angle ⁇ .
  • the overall light image 220 produced is similar to that of the figure 4 relating to the first embodiment.
  • the configuration of the Figures 7 and 8 may be advantageous in that it homogenizes oblique cut-off and horizontal cut-off light images by collecting light differentially laterally and longitudinally.
  • This configuration is advantageous in the case of a reflector material, such as thermosetting plastic, requiring the application of a varnish before the reflective treatment.
  • FIGS. 9 and 10 illustrate a fourth 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 300. Reference is also made to the description of these elements in the context of the first embodiment.
  • the reflective surface 314 is distinguished from the reflective surface 14 of the first embodiment ( figure 3 ) essentially in that the central zone 314.1 is configured to form the diffuse light image 320.3, one of the adjacent lateral zones 314.2 and 314.3, in this case the zone 314.2 is configured to form the horizontal cut-off light image 320.2 and the other 314.3 of said adjacent lateral zones is configured to form the oblique cut-off light image 320.1. Extra-lateral zones with functions distinct from the others are then not present. In this configuration, the central zones 314.1 and adjacent lateral zones 314.2 and 314.3 may be wider than in the previous embodiments.
  • the oblique cut-off light image 320.1 has the general shape of a parallelogram so as to form with the horizontal cut-off light image 320.2 a horizontal cut-off in Z.
  • the angle of inclination ⁇ of the cut-off is advantageously greater than the angle of inclination ⁇ of the light source 312.
  • FIGS. 11 and 12 illustrate a fifth 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 400. Reference is also made to the description of these elements in the context of the first embodiment.
  • the reflective surface 414 is distinguished from the reflective surface 14 of the first embodiment ( figure 3 ) essentially in that the adjacent lateral areas and the extra-lateral areas are reversed. More specifically, the lateral areas 414.2 and 414.3, adjacent to the central area 414.1, are configured to form the diffuse light image 420.3, while the extra-lateral areas 414.4 and 414.5, adjacent to the lateral areas 414.2 and 414.3 adjacent to the central area 414.1, are configured to form the horizontal cut-off light image 420.2.
  • the oblique cut-off light image 420.1 has the general shape of a parallelogram so as to form a horizontal Z cut-off with the horizontal cut-off light image 420.2.
  • the angle of inclination ⁇ of the cut-off corresponds to the angle of inclination ⁇ of the light source 412.
  • FIGS. 13 and 14 illustrate a sixth embodiment of the invention.
  • the reference numbers of the first embodiment are used to designate identical or corresponding elements, these numbers being increased by 500. Reference is also made to the description of these elements in the context of the first embodiment.
  • the reflective surface 514 is distinguished from the reflective surface 14 of the first embodiment ( figure 3 ) essentially in that it does not comprise an area configured to form an oblique cut-off light image. More specifically, the reflective surface 514 comprises a central area 514.1 and two adjacent lateral areas 514.2 and 514.3 configured to form a horizontal cut-off light image 520.2, and two extra-lateral areas, adjacent to the two lateral areas 514.2 and 514.3 adjacent to the central area 514.1, configured to form a diffuse light image 520.3. Since no oblique cut-off is present, the light source 520 advantageously is not inclined.
  • the overall light image 520 has a horizontal cut, without an oblique cut.
  • the different configurations described above illustrate the advantages of flexibility in producing the cut-off light beam, in particular depending on the type of light source and the space available for the reflecting surface.
  • the reflecting surface can thus be configured in different ways, in particular with a view to optimizing its complexity, the connections between the different zones, and also with a view to forming a specific light image, such as in particular with a horizontal Z cut-off.
  • the different configurations described above are not exhaustive, other configurations being conceivable.

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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

L'invention a trait au domaine de l'éclairage, plus particulièrement de l'éclairage pour véhicule automobile.The invention relates to the field of lighting, more particularly lighting for motor vehicles.

Les documents JP 2012 059675 A et US 2017/261172 A1 décrivent des modules lumineux pour véhicules automobiles comprenant une source lumineuse et une surface de réflexion subdivisée en plusieurs zones.The documents JP 2012 059675 A And US 2017/261172 A1 describe light modules for motor vehicles comprising a light source and a reflection surface subdivided into several zones.

Le document de brevet publié EP 2 309 172 A1 divulgue un projecteur lumineux pour véhicule automobile, comprenant un module lumineux apte à produire un faisceau lumineux à coupure horizontale, correspondant à la fonction d'éclairage couramment dénommée « code » en français, ou encore « low beam » en anglais. Pour ce faire, le module comprend une surface réfléchissante du type parabolique comprenant plusieurs zones aptes, à partir de la lumière émise par la source lumineuse vers la surface réfléchissante, à former différentes images lumineuses spécifiques et se superposant pour former le faisceau lumineux. A cet effet, la zone centrale qui est en intersection avec l'axe optique et l'axe d'émission de lumière de la source lumineuse est configurée pour former une image lumineuse à coupure horizontale, alors que les zones latérales et adjacentes à la zone centrale forment une image lumineuse avec une coupure oblique. Des zones extra-latérales, adjacentes aux zones latérales elles-mêmes adjacentes à la zone centrale forment quant à elles une image lumineuse diffuse, davantage étendue que les images à coupure. Une telle configuration permet de former plusieurs images lumineuses spécifiques avec un seul module, plus particulièrement une seule source lumineuse et une seule surface réfléchissante. Cela présente un avantage de compacité. Cependant, cette configuration impose certaines contraintes géométriques à la zone centrale étroite afin de pouvoir former l'image lumineuse à coupure horizontale, ce qui impose alors des variations importantes de rayon de courbure pour les zones latérales adjacentes. Par ailleurs, la netteté de la coupure oblique de l'image lumineuse à coupure oblique peut s'avérer déficiente, essentiellement en ce que l'inclinaison de la coupure est assurée par une configuration particulière aux zones latérales de la surface réfléchissante, tant au niveau du rayon de courbure dans un plan longitudinal que du rayon de courbure dans un plan transversal.The published patent document EP 2 309 172 A1 discloses a light projector for a motor vehicle, comprising a light module capable of producing a light beam with horizontal cut-off, corresponding to the lighting function commonly called "code" in French, or "low beam" in English. To do this, the module comprises a reflecting surface of the parabolic type comprising several zones capable, from the light emitted by the light source towards the reflecting surface, of forming different specific light images and superimposing themselves to form the light beam. To this end, the central zone which intersects with the optical axis and the light emission axis of the light source is configured to form a light image with horizontal cut-off, while the lateral zones and adjacent to the central zone form a light image with an oblique cut-off. Extra-lateral zones, adjacent to the lateral zones themselves adjacent to the central zone, form a diffuse light image, more extensive than the cut-off images. Such a configuration makes it possible to form several specific light images with a single module, more particularly a single light source and a single reflecting surface. This has the advantage of compactness. However, this configuration imposes certain geometric constraints on the narrow central area in order to be able to form the horizontal cut-off light image, which then imposes significant variations in the radius of curvature for the adjacent lateral areas. Furthermore, the sharpness of the oblique cut-off of the oblique cut-off light image may prove deficient, essentially in that the inclination of the cut-off is ensured by a particular configuration at the lateral areas of the reflecting surface, both at the level of the radius of curvature in a longitudinal plane and at the level of the radius of curvature in a transverse plane.

L'invention a pour objectif de pallier au moins un des inconvénients de l'état de la technique susmentionné. Plus particulièrement, l'invention a pour objectif de proposer un module lumineux apte à former un faisceau d'éclairage à coupure horizontale qui procure davantage de flexibilité quant à l'image lumineuse produite tout en restant compact. Plus particulièrement encore, l'invention a pour objectif de proposer un module lumineux apte à former un faisceau d'éclairage à coupure horizontale avec un ressaut (« kink » en anglais) oblique davantage net.The invention aims to overcome at least one of the drawbacks of the aforementioned state of the art. More particularly, the invention aims to propose a light module capable of forming a cut-off lighting beam horizontal which provides more flexibility in the light image produced while remaining compact. More particularly, the invention aims to propose a light module capable of forming a horizontal cut-off lighting beam with a sharper oblique kink.

L'invention a pour objet un module lumineux pour véhicule automobile tel que défini dans la revendication 1 et comprenant une source lumineuse à semi-conducteur avec une surface éclairante généralement plane apte à émettre de la lumière suivant un axe d'émission perpendiculaire audit plan ; une surface de réflexion apte à réfléchir au moins une partie de la lumière émise par la source lumineuse de manière à former, suivant un axe optique, un faisceau lumineux à coupure, et comprenant une zone centrale intersectée par l'axe optique et l'axe d'émission ; et au moins une zone latérale à la zone centrale ; lesdites zones étant configurées pour former des images lumineuses spécifiques formant le faisceau lumineux à coupure ; la ou au moins une des zones latérales étant configurée pour former une image lumineuse à coupure horizontale.The invention relates to a light module for a motor vehicle as defined in claim 1 and comprising a semiconductor light source with a generally flat illuminating surface capable of emitting light along an emission axis perpendicular to said plane; a reflection surface capable of reflecting at least part of the light emitted by the light source so as to form, along an optical axis, a cut-off light beam, and comprising a central zone intersected by the optical axis and the emission axis; and at least one zone lateral to the central zone; said zones being configured to form specific light images forming the cut-off light beam; the or at least one of the lateral zones being configured to form a horizontal cut-off light image.

Avantageusement l'axe d'émission de la surface éclairante est perpendiculaire à l'axe optique.Advantageously, the emission axis of the illuminating surface is perpendicular to the optical axis.

Selon l'invention, la source lumineuse comprend, dans le plan de la surface d'émission, au moins un bord d'émission, préférentiellement généralement rectiligne, transversal à l'axe optique. Avantageusement, le bord d'émission situé vers l'avant lorsque la surface de réflexion est située sous la source lumineuse, ou situé vers l'arrière lorsque la surface de réflexion est située au-dessus de la source lumineuse, permet d'assurer une coupure horizontale et/ou oblique du faisceau lumineux.According to the invention, the light source comprises, in the plane of the emission surface, at least one emission edge, preferably generally rectilinear, transverse to the optical axis. Advantageously, the emission edge located towards the front when the reflection surface is located under the light source, or located towards the rear when the reflection surface is located above the light source, makes it possible to ensure a horizontal and/or oblique cutoff of the light beam.

Selon un mode avantageux de l'invention, la zone centrale est configurée pour former une image lumineuse à coupure inclinée.According to an advantageous embodiment of the invention, the central zone is configured to form a light image with an inclined cut-off.

Selon un mode avantageux de l'invention, la ou les zones latérales configurées pour former l'image lumineuse à coupure horizontale est ou sont adjacente(s) à la zone centrale et d'un côté ou de part et d'autre, respectivement, par rapport à l'axe optique, de ladite zone.According to an advantageous embodiment of the invention, the lateral zone(s) configured to form the horizontal cut-off light image is or are adjacent to the central zone and on one side or on either side, respectively, relative to the optical axis, of said zone.

Selon un mode avantageux de l'invention, la zone centrale est configurée pour former une image lumineuse de diffusion sous l'horizontale, plus étendue que les autres images lumineuses.According to an advantageous embodiment of the invention, the central zone is configured to form a luminous diffusion image below the horizontal, more extensive than the other luminous images.

Selon un mode avantageux de l'invention, la zone latérale configurée pour former l'image lumineuse à coupure horizontale est une première zone latérale adjacente à la zone centrale, les zones latérales comprenant une deuxième zone latérale adjacente à la zone centrale, opposée à la première zone latérale adjacente par rapport à l'axe optique, la deuxième zone latérale adjacente étant configurée pour former une image lumineuse à coupure inclinée.According to an advantageous embodiment of the invention, the lateral zone configured to form the luminous image with horizontal cut-off is a first lateral zone adjacent to the central zone, the lateral zones comprising a second lateral zone adjacent to the central zone, opposite the first adjacent lateral zone relative to the optical axis, the second adjacent lateral zone being configured to form a luminous image with inclined cut-off.

Selon l'invention, la source lumineuse comprend, dans le plan de la surface d'émission, un bord d'émission et est inclinée de manière à ce que ledit bord forme un angle α avec une perpendiculaire à l'axe optique et à l'axe d'émission.According to the invention, the light source comprises, in the plane of the emission surface, an emission edge and is inclined so that said edge forms an angle α with a perpendicular to the optical axis and to the emission axis.

Selon l'invention, l'angle α est supérieur ou égal à 10° et inférieur ou égal à 45°, préférentiellement supérieur ou égal à 15° et inférieur ou égal à 35°.According to the invention, the angle α is greater than or equal to 10° and less than or equal to 45°, preferably greater than or equal to 15° and less than or equal to 35°.

Selon un mode avantageux de l'invention, l'image lumineuse à coupure inclinée présente une inclinaison par rapport à une direction horizontale qui correspond à l'angle α.According to an advantageous embodiment of the invention, the light image with inclined cut-off has an inclination relative to a horizontal direction which corresponds to the angle α.

Selon un mode avantageux de l'invention, l'image lumineuse à coupure inclinée présente une inclinaison β par rapport à une direction horizontale qui est différent de l'angle α.According to an advantageous embodiment of the invention, the light image with inclined cut-off has an inclination β relative to a horizontal direction which is different from the angle α.

Selon un mode avantageux de l'invention, les zones latérales comprennent, en outre, au moins une zone extra-latérale adjacente à la ou une des zones latérales adjacentes à la zone centrale.According to an advantageous embodiment of the invention, the lateral zones further comprise at least one extra-lateral zone adjacent to the or one of the lateral zones adjacent to the central zone.

Selon un mode avantageux de l'invention, l'au moins une zone extra-latérale est configurée pour former une image lumineuse de diffusion sous l'horizontale, plus étendue que les autres images lumineuses.According to an advantageous embodiment of the invention, the at least one extra-lateral zone is configured to form a luminous diffusion image below the horizontal, more extensive than the other luminous images.

Selon un mode avantageux de l'invention, l'au moins une zone extra-latérale correspond aux zones latérales configurées pour former l'image lumineuse à coupure horizontale.According to an advantageous embodiment of the invention, the at least one extra-lateral zone corresponds to the lateral zones configured to form the light image with horizontal cut-off.

Selon un mode avantageux de l'invention, la zone centrale présente des bords longitudinaux adjacents aux zones latérales, lesdits bords étant inclinés d'un angle γ par rapport à l'axe optique.According to an advantageous embodiment of the invention, the central zone has longitudinal edges adjacent to the lateral zones, said edges being inclined at an angle γ relative to the optical axis.

Selon un mode avantageux de l'invention, l'angle γ est supérieur ou égal à 5° et/ou inférieur ou égal à 20°. Avantageusement, l'angle γ est supérieur ou égal à 10°.According to an advantageous embodiment of the invention, the angle γ is greater than or equal to 5° and/or less than or equal to 20°. Advantageously, the angle γ is greater than or equal to 10°.

Selon un mode avantageux de l'invention, la surface réfléchissante est du type parabolique.According to an advantageous embodiment of the invention, the reflecting surface is of the parabolic type.

L'invention a également pour objet un projecteur comprenant un boîtier formant une ouverture, une glace de fermeture de l'ouverture, et au moins un module lumineux, remarquable en ce que l'au moins un module lumineux est conforme à l'invention.The invention also relates to a projector comprising a housing forming an opening, a glass for closing the opening, and at least one light module, remarkable in that the at least one light module conforms to the invention.

Les mesures de l'invention sont intéressantes en ce qu'elles permettent d'utiliser davantage de surface pour réaliser la coupure horizontale du faisceau lumineux, et ainsi de concentrer les rayons lumineux au niveau et directement sous la coupure. Elles permettent également, moyennant une inclinaison de la source lumineuse, de réaliser une coupure oblique particulièrement nette et robuste en ce que la coupure est moins sensible aux tolérances de fabrication du module lumineux et aux éventuelles déformées de la zone concernée de la surface réfléchissante. Elles confèrent également davantage de liberté quant à l'agencement des zones, notamment pour réaliser des images lumineuses à coupure horizontale, à coupure oblique et diffuses.The measures of the invention are interesting in that they make it possible to use more surface area to achieve the horizontal cut-off of the light beam, and thus to concentrate the light rays at and directly below the cut-off. They also make it possible, by means of an inclination of the light source, to achieve a particularly sharp and robust oblique cut-off in that the cut-off is less sensitive to manufacturing tolerances of the light module and to possible deformations of the relevant area of the reflecting surface. They also provide greater freedom with regard to the arrangement of the areas, in particular for producing light images with horizontal cut-off, oblique cut-off and diffuse.

D'autres caractéristiques et avantages de la présente invention seront mieux compris à l'aide de la description et des dessins parmi lesquels :

  • La figure 1 est une vue schématique en coupe d'un projecteur pour véhicule automobile, conforme à l'invention, comprenant un module lumineux également conforme à l'invention ;
  • La figure 2 est une représentation en perspective de la surface réfléchissante et de la source lumineuse du module lumineux du projecteur de la figure 1 ;
  • La figure 3 est une représentation schématique, de dessus, de la surface réfléchissante et de la source lumineuse de la figure 2, selon un premier mode de réalisation de l'invention ;
  • La figure 4 est une représentation schématique, suivant des axes horizontaux et verticaux, des images lumineuses produites par les différentes zones de la surface réfléchissante de la figure 3 ;
  • La figure 5 est une représentation schématique, de dessus, de la surface réfléchissante et de la source lumineuse, selon un deuxième mode de réalisation de l'invention ;
  • La figure 6 est une représentation schématique, suivant des axes horizontaux et verticaux, des images lumineuses produites par les différentes zones de la surface réfléchissante de la figure 5 ;
  • La figure 7 est une représentation schématique, de dessus, de la surface réfléchissante et de la source lumineuse, selon un troisième mode de réalisation de l'invention ;
  • La figure 8 est une représentation schématique, suivant des axes horizontaux et verticaux, des images lumineuses produites par les différentes zones de la surface réfléchissante de la figure 7 ;
  • La figure 9 est une représentation schématique, de dessus, de la surface réfléchissante et de la source lumineuse, selon un quatrième mode de réalisation de l'invention ;
  • La figure 10 est une représentation schématique, suivant des axes horizontaux et verticaux, des images lumineuses produites par les différentes zones de la surface réfléchissante de la figure 9 ;
  • La figure 11 est une représentation schématique, de dessus, de la surface réfléchissante et de la source lumineuse, selon un cinquième mode de réalisation de l'invention ;
  • La figure 12 est une représentation schématique, suivant des axes horizontaux et verticaux, des images lumineuses produites par les différentes zones de la surface réfléchissante de la figure 11 ;
  • La figure 13 est une représentation schématique, de dessus, de la surface réfléchissante et de la source lumineuse, selon un sixième mode de réalisation de l'invention ;
  • La figure 14 est une représentation schématique, suivant des axes horizontaux et verticaux, des images lumineuses produites par les différentes zones de la surface réfléchissante de la figure 13.
Other features and advantages of the present invention will be better understood with the aid of the description and the drawings among which:
  • There figure 1 is a schematic sectional view of a headlight for a motor vehicle, in accordance with the invention, comprising a light module also in accordance with the invention;
  • There figure 2 is a perspective representation of the reflective surface and light source of the projector's light module of the figure 1 ;
  • There figure 3 is a schematic representation, from above, of the reflecting surface and the light source of the figure 2 , according to a first embodiment of the invention;
  • There figure 4 is a schematic representation, along horizontal and vertical axes, of the light images produced by the different areas of the reflective surface of the figure 3 ;
  • There figure 5 is a schematic representation, from above, of the reflective surface and the light source, according to a second embodiment of the invention;
  • There figure 6 is a schematic representation, along horizontal and vertical axes, of the light images produced by the different areas of the reflective surface of the figure 5 ;
  • There figure 7 is a schematic representation, from above, of the reflective surface and the light source, according to a third embodiment of the invention;
  • There figure 8 is a schematic representation, along horizontal and vertical axes, of the light images produced by the different areas of the reflective surface of the figure 7 ;
  • There figure 9 is a schematic representation, from above, of the reflective surface and the light source, according to a fourth embodiment of the invention;
  • There figure 10 is a schematic representation, along horizontal and vertical axes, of the light images produced by the different areas of the reflective surface of the figure 9 ;
  • There figure 11 is a schematic representation, from above, of the reflective surface and the light source, according to a fifth embodiment of the invention;
  • There figure 12 is a schematic representation, along horizontal and vertical axes, of the light images produced by the different areas of the reflective surface of the figure 11 ;
  • There figure 13 is a schematic representation, from above, of the reflective surface and the light source, according to a sixth embodiment of the invention;
  • There figure 14 is a schematic representation, along horizontal and vertical axes, of the light images produced by the different areas of the reflective surface of the figure 13 .

La figure 1 illustre un projecteur pour véhicule automobile, conforme à l'invention, comprenant un module lumineux également conforme à l'invention, selon l'un quelconque des modes de réalisation.There figure 1 illustrates a headlight for a motor vehicle, in accordance with the invention, comprising a light module also in accordance with the invention, according to any one of the embodiments.

La figure 1 illustre un projecteur 2 de véhicule automobile, comprenant essentiellement un boîtier 4 formant ouverture recouverte par une glace 6. Le boîtier 4 du projecteur 2 renferme un module lumineux 8 apte à former un faisceau lumineux à coupure horizontale et optionnellement avec une partie oblique, correspondant à un faisceau d'éclairage couramment désigné « code » ou encore « low-beam » en anglais. Le module lumineux 8 comprend, essentiellement un support 10, une source lumineuse 12 et une surface réfléchissante 14. Cette dernière est avantageusement du type parabolique, c'est-à-dire, de manière générale, une surface présentant un seul foyer, c'est-à-dire une zone de convergence des rayons lumineux telle que les rayons lumineux émis par la source lumineuse placée au niveau de cette zone de convergence sont projetés à grande distance après réflexion sur la surface. Projeté à grande distance signifie que ces rayons lumineux ne convergent pas vers une zone située à moins 10 fois les dimensions du réflecteur. Autrement dit, les rayons réfléchis ne convergent pas vers une zone de convergence ou, s'ils convergent, cette zone de convergence est située à une distance supérieure ou égale à 10 fois les dimensions du réflecteur. Une surface de type parabolique peut donc présenter ou non des portions paraboliques. Un réflecteur présentant une telle surface est généralement utilisé seul pour créer un faisceau lumineux. Comme cela est visible à la figure 1, la surface réfléchissante 14 est configurée pour réfléchir les rayons lumineux émis par la source lumineuse 12, suivant l'axe optique 16.There figure 1 illustrates a motor vehicle headlight 2, essentially comprising a housing 4 forming an opening covered by a glass 6. The housing 4 of the headlight 2 contains a light module 8 capable of forming a light beam with horizontal cut-off and optionally with an oblique part, corresponding to a lighting beam commonly referred to as "code" or "low-beam" in English. The light module 8 essentially comprises a support 10, a light source 12 and a reflecting surface 14. The latter is advantageously of the parabolic type, that is to say, generally speaking, a surface having a single focus, that is to say a zone of convergence of the light rays such that the light rays emitted by the light source placed at the level of this zone of convergence are projected at a great distance after reflection on the surface. Projected at a great distance means that these light rays do not converge towards an area located at least 10 times the dimensions of the reflector. In other words, the reflected rays do not converge to a convergence zone or, if they converge, this convergence zone is located at a distance greater than or equal to 10 times the dimensions of the reflector. A parabolic surface may or may not have parabolic portions. A reflector with such a surface is generally used alone to create a light beam. As can be seen in the figure 1 , the reflective surface 14 is configured to reflect the light rays emitted by the light source 12, along the optical axis 16.

Toujours en référence à la figure 1, le projecteur peut comprendre un autre module lumineux, en l'occurrence situé sous le module lumineux 8, notamment configuré pour former, avec le module lumineux 8, un faisceau lumineux sans coupure, couramment désigné « route » ou encore « high-beam » en anglais.Still referring to the figure 1 , the projector may comprise another light module, in this case located under the light module 8, in particular configured to form, with the light module 8, an uninterrupted light beam, commonly referred to as “road” or “high-beam” in English.

La figure 2 illustre en perspective de la surface réfléchissante et de la source lumineuse du module lumineux du projecteur de la figure 1. Elle s'applique à tous les modes de réalisation, étant entendu que pour le sixième mode de réalisation l'angle α mentionné dans la description de cette figure est égal à 0.There figure 2 illustrates in perspective the reflective surface and the light source of the light module of the projector of the figure 1 . It applies to all embodiments, it being understood that for the sixth embodiment the angle α mentioned in the description of this figure is equal to 0.

La figure 2 illustre en perspective la source lumineuse 12 et la surface réfléchissante 14 du module lumineux de la figure 1. On peut observer que la surface réfléchissante 14 est subdivisée en plusieurs zones 14.1-14.5 s'étendant essentiellement longitudinalement, c'est-à-dire suivant l'axe optique 16, et disposées côte-à-côte latéralement. De manière générale, ces différentes zones sont configurées pour former, à partir de la même source lumineuse 12, différentes images lumineuses qui, superposées, vont former le faisceau lumineux. A cet effet, ces zones, bien qu'avantageusement généralement paraboliques, présentent des surfaces spécifiques en ce qu'elles sont déformées par rapport à des portions de surface parabolique de révolution, en fonction de l'image lumineuses qu'elles doivent former.There figure 2 illustrates in perspective the light source 12 and the reflective surface 14 of the light module of the figure 1 . It can be observed that the reflecting surface 14 is subdivided into several zones 14.1-14.5 extending essentially longitudinally, that is to say along the optical axis 16, and arranged side by side laterally. Generally, these different zones are configured to form, from the same light source 12, different light images which, superimposed, will form the light beam. For this purpose, these zones, although advantageously generally parabolic, have specific surfaces in that they are deformed relative to portions of the parabolic surface of revolution, depending on the light image that they must form.

La source lumineuse 12 est à semi-conducteur et présente une surface éclairante généralement plane et pourvue d'un bord avant 12.1 et d'un bord arrière 12.2. Le bord avant 12.1 est avantageusement rectiligne et est apte à former avec la surface réfléchissante 14 la coupure horizontale du faisceau lumineux. La surface éclairante est avantageusement généralement rectangulaire et présente un axe principal 12.3 parallèle aux bord avant et arrière 12.1 et 12.2. On peut observer que la source lumineuse 12 est inclinée de sorte à ce que son axe principal 12.3 forme un angle α avec une direction 18 perpendiculaire à l'axe optique 16. Cette direction 18 et l'axe principal 12.3 de la source lumineuse 12 sont avantageusement dans un plan horizontal lorsque le module lumineux est en position de montage, tel qu'illustrée à la figure 1. L'angle α peut être supérieur ou égal à 10° et/ou inférieur ou égal à 45°. En l'occurrence il est de l'ordre de 15°. L'angle α représenté à la figure 2 (également à la figure 3) est exagéré à des fins de clarté d'exposé.The light source 12 is a semiconductor and has a generally flat illuminating surface provided with a front edge 12.1 and a rear edge 12.2. The front edge 12.1 is advantageously rectilinear and is capable of forming with the reflecting surface 14 the horizontal cutoff of the light beam. The illuminating surface is advantageously generally rectangular and has a main axis 12.3 parallel to the front and rear edges 12.1 and 12.2. It can be observed that the source light source 12 is inclined so that its main axis 12.3 forms an angle α with a direction 18 perpendicular to the optical axis 16. This direction 18 and the main axis 12.3 of the light source 12 are advantageously in a horizontal plane when the light module is in the mounting position, as illustrated in FIG. figure 1 . The angle α can be greater than or equal to 10° and/or less than or equal to 45°. In this case it is of the order of 15°. The angle α represented in the figure 2 (also at the figure 3 ) is exaggerated for the sake of clarity of exposition.

Les figures 3 et 4 illustrent un premier mode de réalisation de l'invention.THE Figures 3 and 4 illustrate a first embodiment of the invention.

Les figures 3 et 4 illustrent de manière quelque peu schématique les fonctions des différentes zones 14.1-14.5 de la surface réfléchissante 14. A cet effet, les hachures sur ces zones à la figure 3 et les hachures sur les images lumineuses à la figure 4 se correspondent, c'est-à-dire que la ou les zones couvertes par un type hachures forment une image lumineuse représentée par le même type de hachures.THE Figures 3 and 4 illustrate somewhat schematically the functions of the different zones 14.1-14.5 of the reflecting surface 14. For this purpose, the hatching on these zones at the figure 3 and the hatching on the light images at the figure 4 correspond, that is, the area(s) covered by one type of hatching form a light image represented by the same type of hatching.

La zone centrale 14.1 est intersectée par l'axe optique 16 ainsi que par l'axe d'émission 12.4 de la source lumineuse 12, cet axe étant perpendiculaire au plan de la surface éclairante de ladite source. Cette zone est configurée pour former l'image lumineuse 20.1 à coupure oblique à la figure 4. En l'occurrence l'angle α d'inclinaison de la source lumineuse 12 correspond à l'angle d'inclinaison de la coupure oblique. Le bord d'émission avant 12.1 de la source lumineuse 12 forme alors la coupure oblique. A cet effet, la zone centrale 14.1 est alors une portion de surface, avantageusement du type parabolique, quelque peu déformée pour former une image davantage concentrée verticalement et horizontalement et également décalée latéralement. De telles adaptations de portions de surface sont réalisables par l'homme de métier, notamment par des moyens numériques commercialement disponibles, dès lors que les conditions de fonctionnement telles décrites ci-avant sont connues.The central zone 14.1 is intersected by the optical axis 16 as well as by the emission axis 12.4 of the light source 12, this axis being perpendicular to the plane of the illuminating surface of said source. This zone is configured to form the light image 20.1 with oblique cutoff at the figure 4 . In this case, the angle α of inclination of the light source 12 corresponds to the angle of inclination of the oblique cut-off. The front emission edge 12.1 of the light source 12 then forms the oblique cut-off. For this purpose, the central zone 14.1 is then a surface portion, advantageously of the parabolic type, somewhat deformed to form an image that is more concentrated vertically and horizontally and also laterally offset. Such adaptations of surface portions can be carried out by those skilled in the art, in particular by commercially available digital means, provided that the operating conditions as described above are known.

Les zones latérales 14.2 et 14.3, adjacentes à la zone centrale 14.1, et de part et d'autre de l'axe optique 16, sont configurées pour former l'image lumineuse 20.2 à coupure horizontale. Il s'agit d'une image concentrée verticalement, étendue horizontalement et présentant un bord de coupure horizontale situé juste en dessous de l'axe horizontal H. Ces zones latérales adjacentes 14.2 et 14.3 sont alors déformées, notamment par rapport à une surface parabolique de révolution, de manière notamment à concentrer verticalement les rayons lumineux réfléchis. Elles doivent également corriger l'inclinaison α du bord avant d'émission 12.1 afin de former une image dudit bord horizontale, correspondant au bord de coupure du faisceau lumineux 20.The lateral zones 14.2 and 14.3, adjacent to the central zone 14.1, and on either side of the optical axis 16, are configured to form the luminous image 20.2 with horizontal cut-off. This is a vertically concentrated image, extended horizontally and having a horizontal cut-off edge located just below the horizontal axis H. These adjacent lateral zones 14.2 and 14.3 are then deformed, in particular with respect to a parabolic surface of revolution, in particular so as to vertically concentrate the reflected light rays. They must also correct the inclination α of the front emission edge 12.1 in order to form an image of said horizontal edge, corresponding to the cut-off edge of the light beam 20.

Les zones extra-latérales 14.4 et 14.5, adjacentes aux zones latérales adjacentes 14.2 et 14.3, sont quant à elles configurées pour former une image diffuse 20.3, située sous l'axe horizontal H.The extra-lateral zones 14.4 and 14.5, adjacent to the adjacent lateral zones 14.2 and 14.3, are configured to form a diffuse image 20.3, located below the horizontal axis H.

Cet agencement des zones fonctionnelles de la surface réfléchissante permet ainsi d'utiliser davantage de surface pour former la coupure horizontale et ainsi de de rendre cette image plus lumineuse. L'inclinaison de la source lumineuse permet également de réaliser une coupure oblique plus nette.This arrangement of the functional areas of the reflective surface thus makes it possible to use more surface area to form the horizontal cut-off and thus to make this image brighter. The inclination of the light source also makes it possible to achieve a sharper oblique cut-off.

Les figures 5 et 6 illustrent 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 dans le cadre du premier mode de réalisation.THE Figures 5 and 6 illustrate a second embodiment of the invention. The reference numbers of the first embodiment are used to designate identical or corresponding elements, these numbers being increased by 100. Reference is also made to the description of these elements in the context of the first embodiment.

La configuration de la surface réfléchissante 114 à la figure 5 est similaire à celle à la figure 3 du premier mode de réalisation. La surface réfléchissante 114 se distingue cependant de la surface réfléchissante 14 (figure 3) en ce que la zone centrale 114.1 est configurée pour former une image lumineuse 120.1 à coupure oblique d'une forme différente, à savoir en forme de parallélogramme incliné d'un angle β potentiellement différent de l'angle α d'inclinaison de la source lumineuse 112. L'image lumineuse globale 120 ainsi formé présente ainsi une coupure en Z contrairement à l'image lumineuse 20 (figure 4) du premier mode de réalisation qui présente une coupure en V.The configuration of the reflective surface 114 at the figure 5 is similar to that at the figure 3 of the first embodiment. The reflective surface 114 is however distinguished from the reflective surface 14 ( figure 3 ) in that the central zone 114.1 is configured to form a light image 120.1 with an oblique cut-off of a different shape, namely in the form of a parallelogram inclined at an angle β potentially different from the angle α of inclination of the light source 112. The overall light image 120 thus formed thus has a Z cut-off unlike the light image 20 ( figure 4 ) of the first embodiment which has a V-shaped cut.

Les figures 7 et 8 illustrent un troisième 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 200. Il est par ailleurs fait référence à la description de ces éléments dans le cadre du premier mode de réalisation.THE Figures 7 and 8 illustrate a third 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 200. Reference is also made to the description of these elements in the context of the first embodiment.

A la figure 7, la surface réfléchissante 214 se distingue de la surface réfléchissante 14 du premier mode de réalisation (figure 3) essentiellement en ce que la zone centrale 214.1 est inclinée d'un angle γ par rapport à l'axe optique 216, supérieur ou égal à 5° et/ou inférieur ou égal à 20°, avantageusement supérieur ou égale à 10°. Les frontières entre les zones latérales adjacentes 214.2 et 214.3 et la zone centrale 214.1 sont ainsi inclinées de l'angle γ.To the figure 7 , the reflective surface 214 is distinguished from the reflective surface 14 of the first embodiment ( figure 3 ) essentially in that the central zone 214.1 is inclined by an angle γ relative to the optical axis 216, greater than or equal to 5° and/or less than or equal to 20°, advantageously greater than or equal to 10°. The boundaries between the adjacent lateral zones 214.2 and 214.3 and the central zone 214.1 are thus inclined by the angle γ.

A la figure 8, l'image lumineuse globale 220 produite est similaire à celle de la figure 4 relative au premier mode de réalisation.To the figure 8 , the overall light image 220 produced is similar to that of the figure 4 relating to the first embodiment.

La configuration des figures 7 et 8 peut être avantageuse en ce qu'elle homogénéise les images lumineuses à coupure oblique et à coupure horizontale en collectant de la lumière de manière différenciée latéralement et longitudinalement. Cette configuration est avantageuse dans le cas d'un matériau de réflecteur, tel que du plastique thermodurcissable, nécessitant l'application d'un vernis avant le traitement réfléchissant.The configuration of the Figures 7 and 8 may be advantageous in that it homogenizes oblique cut-off and horizontal cut-off light images by collecting light differentially laterally and longitudinally. This configuration is advantageous in the case of a reflector material, such as thermosetting plastic, requiring the application of a varnish before the reflective treatment.

Les figures 9 et 10 illustrent un quatrième 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 300. Il est par ailleurs fait référence à la description de ces éléments dans le cadre du premier mode de réalisation.THE Figures 9 and 10 illustrate a fourth 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 300. Reference is also made to the description of these elements in the context of the first embodiment.

Aux figures 9 et 10, la surface réfléchissante 314 se distingue de la surface réfléchissante 14 du premier mode de réalisation (figure 3) essentiellement en ce que la zone centrale 314.1 est configurée pour former l'image lumineuse diffuse 320.3, une des zones latérales adjacentes 314.2 et 314.3, en l'occurrence la zone 314.2 est configurée pour former l'image lumineuse à coupure horizontale 320.2 et l'autre 314.3 desdites zones latérales adjacentes est configurée pour former l'image lumineuse à coupure oblique 320.1. Des zones extra-latérales avec des fonctions distinctes des autres ne sont alors pas présentes. Dans cette configuration, les zones centrale 314.1 et latérales adjacentes 314.2 et 314.3 pourront être plus larges que dans les modes de réalisation précédents.To Figures 9 and 10 , the reflective surface 314 is distinguished from the reflective surface 14 of the first embodiment ( figure 3 ) essentially in that the central zone 314.1 is configured to form the diffuse light image 320.3, one of the adjacent lateral zones 314.2 and 314.3, in this case the zone 314.2 is configured to form the horizontal cut-off light image 320.2 and the other 314.3 of said adjacent lateral zones is configured to form the oblique cut-off light image 320.1. Extra-lateral zones with functions distinct from the others are then not present. In this configuration, the central zones 314.1 and adjacent lateral zones 314.2 and 314.3 may be wider than in the previous embodiments.

Similairement au deuxième mode de réalisation aux figures 5 et 6, l'image lumineuse à coupure oblique 320.1 a une forme générale de parallélogramme de manière à former avec l'image lumineuse à coupure horizontale 320.2 une coupure horizontale en Z. L'angle d'inclinaison β de la coupure est avantageusement supérieur à l'angle d'inclinaison α de la source lumineuse 312.Similar to the second embodiment to the Figures 5 and 6 , the oblique cut-off light image 320.1 has the general shape of a parallelogram so as to form with the horizontal cut-off light image 320.2 a horizontal cut-off in Z. The angle of inclination β of the cut-off is advantageously greater than the angle of inclination α of the light source 312.

Les figures 11 et 12 illustrent un cinquième 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 400. Il est par ailleurs fait référence à la description de ces éléments dans le cadre du premier mode de réalisation.THE Figures 11 and 12 illustrate a fifth 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 400. Reference is also made to the description of these elements in the context of the first embodiment.

Aux figures 11 et 12, la surface réfléchissante 414 se distingue de la surface réfléchissante 14 du premier mode de réalisation (figure 3) essentiellement en ce que les zones latérales adjacentes et les zones extra-latérales sont inversées. Plus précisément, les zones latérales 414.2 et 414.3, adjacentes à la zone centrale 414.1, sont configurées pour former l'image lumineuse diffuse 420.3, alors que les zones extra-latérales 414.4 et 414.5, adjacentes aux zones latérales 414.2 et 414.3 adjacentes à la zone centrale 414.1, sont configurées pour former l'image lumineuse à coupure horizontale 420.2.To Figures 11 and 12 , the reflective surface 414 is distinguished from the reflective surface 14 of the first embodiment ( figure 3 ) essentially in that the adjacent lateral areas and the extra-lateral areas are reversed. More specifically, the lateral areas 414.2 and 414.3, adjacent to the central area 414.1, are configured to form the diffuse light image 420.3, while the extra-lateral areas 414.4 and 414.5, adjacent to the lateral areas 414.2 and 414.3 adjacent to the central area 414.1, are configured to form the horizontal cut-off light image 420.2.

Similairement aux deuxième et quatrième modes de réalisation aux figures 5 et 6 et aux figures 9 et 10, l'image lumineuse à coupure oblique 420.1 a une forme générale de parallélogramme de manière à former avec l'image lumineuse à coupure horizontale 420.2 une coupure horizontale en Z. L'angle d'inclinaison α de la coupure correspondant cependant ici à l'angle d'inclinaison α de la source lumineuse 412.Similar to the second and fourth embodiments of the Figures 5 and 6 and to Figures 9 and 10 , the oblique cut-off light image 420.1 has the general shape of a parallelogram so as to form a horizontal Z cut-off with the horizontal cut-off light image 420.2. The angle of inclination α of the cut-off, however, here corresponds to the angle of inclination α of the light source 412.

Les figures 13 et 14 illustrent un sixième 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 500. Il est par ailleurs fait référence à la description de ces éléments dans le cadre du premier mode de réalisation.THE Figures 13 and 14 illustrate a sixth embodiment of the invention. The reference numbers of the first embodiment are used to designate identical or corresponding elements, these numbers being increased by 500. Reference is also made to the description of these elements in the context of the first embodiment.

En référence aux figures 13 et 14, la surface réfléchissante 514 se distingue de la surface réfléchissante 14 du premier mode de réalisation (figure 3) essentiellement en ce qu'elle ne comprend pas de zone configurée pour former une image lumineuse à coupure oblique. Plus précisément, la surface réfléchissante 514 comprend une zone centrale 514.1 et deux zones latérales adjacentes 514.2 et 514.3 configurées pour former une image lumineuse à coupure horizontale 520.2, et deux zones extra-latérales, adjacentes aux deux zones latérales 514.2 et 514.3 adjacentes à la zone centrale 514.1, configurées pour former une image lumineuse diffuse 520.3. En étant donné qu'aucune coupure oblique n'est présente, la source lumineuse 520 avantageusement n'est pas inclinée.In reference to the Figures 13 and 14 , the reflective surface 514 is distinguished from the reflective surface 14 of the first embodiment ( figure 3 ) essentially in that it does not comprise an area configured to form an oblique cut-off light image. More specifically, the reflective surface 514 comprises a central area 514.1 and two adjacent lateral areas 514.2 and 514.3 configured to form a horizontal cut-off light image 520.2, and two extra-lateral areas, adjacent to the two lateral areas 514.2 and 514.3 adjacent to the central area 514.1, configured to form a diffuse light image 520.3. Since no oblique cut-off is present, the light source 520 advantageously is not inclined.

En référence à la figure 14, on peut observer que l'image lumineuse globale 520 présente une coupure horizontale, sans coupure oblique.In reference to the figure 14 , it can be observed that the overall light image 520 has a horizontal cut, without an oblique cut.

Les différentes configurations qui sont décrites ci-avant illustrent les avantages de flexibilité quant à la réalisation du faisceau lumineux à coupure, notamment en fonction du type de source lumineuse et de l'espace disponible pour la surface réfléchissante. La surface réfléchissante peut ainsi être configurée de différentes manières, notamment en vue d'une optimisation de sa complexité, des raccordements entre les différentes zones, et aussi en vue de former une image lumineuse spécifique, comme notamment avec une coupure horizontale en Z. Les différentes configurations décrites ci-avant ne sont pas exhaustives, d'autres configurations étant envisageables.The different configurations described above illustrate the advantages of flexibility in producing the cut-off light beam, in particular depending on the type of light source and the space available for the reflecting surface. The reflecting surface can thus be configured in different ways, in particular with a view to optimizing its complexity, the connections between the different zones, and also with a view to forming a specific light image, such as in particular with a horizontal Z cut-off. The different configurations described above are not exhaustive, other configurations being conceivable.

Claims (14)

  1. Motor vehicle lighting module (8) comprising:
    - a semiconductor light source (12; 112; 212; 312; 412; 512) with a generally plane lighting surface adapted to emit light along an emission axis (12.4; 112.4; 212.4; 312.4; 412.4; 512.4) perpendicular to said plane;
    - a reflection surface (14; 114; 214; 314; 414; 514) adapted to reflect at least some of the light emitted by the light source (12; 112; 212; 312; 412; 512) so as to form, along an optical axis (16; 116; 216; 316; 416; 516), a cut-off light beam (20; 120; 220; 320; 420; 520), and comprising:
    ∘ a central zone (14.1; 114.1; 214.1; 314.1; 414.1; 514.1) intersected by the optical axis (16; 116; 216; 316; 416; 516) and the emission axis (12.4; 112.4; 212.4; 312.4; 412.4; 512.4); and
    ∘ at least one zone (14.2-14.5; 114.2-114.5; 214.2-214.5; 314.2, 314.3; 414.2-414.5; 514.2-515.5) lateral with respect to the central zone (14.1; 114.1; 214.1; 314.1; 414.1; 514.1);
    said zones (14.1-14.5; 114.1-114.5; 214.1-214.5; 314.1-314.5; 414.1-414.5; 514.1-515.5) being configured to form specific luminous images (20.1-20.3; 120.1-120.3; 220.1-220.3; 320.1-320.3; 420.1-420.3; 520.2-520.3) forming the cut-off light beam (20; 120; 220; 320; 420; 520);
    characterized in that
    the or at least one of the lateral zones (14.2, 14.3; 114.2, 114.3; 214.2, 214.3; 314.2; 414.4, 414.5; 514.2, 515.3) is configured to form a horizonal cut-off luminous image (20.2; 120.2; 220.2; 320.2; 420.2; 520.2),
    and in that the light source (12; 112; 212; 312; 412) comprises, in the plane of the emission surface, an emission edge (12.1; 112.1; 212.1; 312.1; 412.1) and is inclined so that said emission edge forms an angle α with a perpendicular (18; 118; 218; 318; 418) to the optical axis and to the emission axis,
    and in that the angle α is greater than or equal to 10° and less than or equal to 45°.
  2. Module (8) according to Claim 1, characterized in that the central zone (14.1; 114.1; 214.1; 414.1) is configured to form an inclined cut-off luminous image (20.1; 120.1; 220.1; 420.1).
  3. Module (8) according to either one of Claims 1 and 2, characterized in that the lateral zone or zones (14.2, 14.3; 114.2, 114.3; 214.2, 214.3; 314.2; 514.2, 515.3) configured to form the horizontal cut-off luminous image (20.2; 120.2; 220.2; 320.2; 520.2) is or are adjacent to the central zone (14.1; 114.1; 214.1; 314.1; 514.1) and on one side or on either side, respectively, of said zone relative to the optical axis (16; 116; 216; 516).
  4. Module (8) according to Claim 1, characterized in that the central zone (314.1) is configured to form a diffusion luminous image (320.3) below the horizontal, more extensive than the other luminous images (320.1, 320.2).
  5. Module (8) according to Claim 4, characterized in that the lateral zone (314.2) configured to form the horizontal cut-off luminous image (320.2) is a first lateral zone adjacent to the central zone (314.1), the lateral zones comprising a second lateral zone (314.3) adjacent to the central zone (314.1), opposite the first adjacent lateral zone (314.2) relative to the optical axis (316), the adjacent second lateral zone (314.3) being configured to form an inclined cut-off luminous image (320.1).
  6. Module (8) according to either one of Claims 2 and 5, characterized in that the inclined cut-off luminous image (20.1; 220.1; 420.1) has an inclination relative to a horizontal direction that corresponds to the angle a.
  7. Module (8) according to either one of Claims 2 and 5, characterized in that the inclined cut-off luminous image (120.1; 320.1) has an inclination β relative to a horizontal direction that is different from the angle α.
  8. Module (8) according to any one of Claims 1 to 7, characterized in that the lateral zones (14.2-14.5; 114.2-114.5; 214.2-214.5; 414.2-414.5; 514.2-515.5) further comprise at least one extra-lateral zone (14.4, 14.5; 114.4, 114.5; 214.4, 214.5; 414.4, 414.5; 514.4, 515.5) adjacent to the or one of the lateral zones (14.2, 14.3; 114.2, 114.3; 214.2, 214.3; 414.2, 414.3; 514.2, 515.3) adjacent to the central zone (14.1; 114.1; 214.1; 414.1; 514.1).
  9. Module (8) according to Claim 8, characterized in that the at least one extra-lateral zone (14.4, 14.5; 114.4, 114.5; 214.4, 214.5; 514.4, 515.5) is configured to form a diffusion luminous image (20.3; 120.3; 220.3; 520.3) below the horizontal more extensive than the other luminous images (20.1, 20.2; 120.1, 120.2; 220.1, 220.2; 520.1, 520.2).
  10. Module (8) according to Claim 8, characterized in that the at least one extra-lateral zone (414.4, 414.5) corresponds to the lateral zones configured to form the horizontal cut-off luminous image (420.2).
  11. Module (8) according to any one of Claims 1 to 10, characterized in that the central zone (214.1) has longitudinal edges adjacent to the lateral zones (214.2, 214.3), said edges being inclined at an angle γ relative to the optical axis (216).
  12. Module (8) according to Claim 11, characterized in that the angle γ is greater than or equal to 10° and/or less than or equal to 20°.
  13. Module (8) according to any one of Claims 1 to 12, characterized in that the reflecting surface (14; 114, 214; 314; 414; 514) is of the parabolic type.
  14. Headlamp (2) comprising a housing (4) forming an opening, an outer lens (6) closing the opening, and at least one lighting module (8), characterized in that the at least one lighting module (8) is a lighting module according to any one of Claims 1 to 13.
EP19176612.0A 2018-05-31 2019-05-24 Lighting module forming a cut-off line with a two zones reflector Active EP3575675B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1854736A FR3081970B1 (en) 2018-05-31 2018-05-31 CUT-OFF LIGHT MODULE WITH ZONE REFLECTOR

Publications (2)

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EP3575675A1 EP3575675A1 (en) 2019-12-04
EP3575675B1 true EP3575675B1 (en) 2024-10-09

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JP (1) JP7551281B2 (en)
CN (1) CN110553221B (en)
ES (1) ES3008461T3 (en)
FR (1) FR3081970B1 (en)

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JP7505186B2 (en) * 2020-01-17 2024-06-25 市光工業株式会社 Vehicle lighting fixtures

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Publication number Priority date Publication date Assignee Title
CN100483013C (en) * 2004-01-09 2009-04-29 株式会社小糸制作所 Vehicular front headlamp
JP2008171743A (en) * 2007-01-15 2008-07-24 Koito Mfg Co Ltd Headlamp for vehicle
JP2009277482A (en) 2008-05-14 2009-11-26 Ichikoh Ind Ltd Lighting fixture for vehicle
JP5460225B2 (en) * 2009-10-09 2014-04-02 株式会社小糸製作所 Vehicle headlamp device
JP2011171121A (en) 2010-02-18 2011-09-01 Ichikoh Ind Ltd Headlight for vehicle
JP5526453B2 (en) * 2010-09-13 2014-06-18 スタンレー電気株式会社 Vehicle headlamp
JP5698065B2 (en) 2011-04-22 2015-04-08 株式会社小糸製作所 Obstacle detection device
JP5722691B2 (en) * 2011-04-22 2015-05-27 株式会社小糸製作所 Vehicle headlamp
JP6042741B2 (en) * 2013-02-14 2016-12-14 スタンレー電気株式会社 Vehicle lighting
JP6474122B2 (en) 2014-09-16 2019-02-27 株式会社小糸製作所 Vehicle lighting
WO2016043059A1 (en) * 2014-09-16 2016-03-24 株式会社小糸製作所 Vehicle lamp
FR3047541B1 (en) * 2015-12-10 2019-10-04 Valeo Vision AUTOMOTIVE LIGHTING MODULE WITH COMBINED CODE AND ROAD FUNCTIONS AND ADJUSTABLE LIGHT SOURCE

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EP3575675A1 (en) 2019-12-04
JP7551281B2 (en) 2024-09-17
FR3081970A1 (en) 2019-12-06
CN110553221A (en) 2019-12-10
FR3081970B1 (en) 2021-06-11
JP2019212625A (en) 2019-12-12
ES3008461T3 (en) 2025-03-24
CN110553221B (en) 2023-06-06

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