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EP2816277B1 - Lighting device of a vehicle using a multifunctional optical lens - Google Patents

Lighting device of a vehicle using a multifunctional optical lens Download PDF

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Publication number
EP2816277B1
EP2816277B1 EP14172985.5A EP14172985A EP2816277B1 EP 2816277 B1 EP2816277 B1 EP 2816277B1 EP 14172985 A EP14172985 A EP 14172985A EP 2816277 B1 EP2816277 B1 EP 2816277B1
Authority
EP
European Patent Office
Prior art keywords
dioptre
input
light
diopter
lighting device
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
EP14172985.5A
Other languages
German (de)
French (fr)
Other versions
EP2816277A1 (en
Inventor
Jean-Luc Meyrenaud
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 EP2816277A1 publication Critical patent/EP2816277A1/en
Application granted granted Critical
Publication of EP2816277B1 publication Critical patent/EP2816277B1/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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/27—Thick lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape

Definitions

  • the invention relates to a lighting device of a vehicle using a multifunction optical lens.
  • Lighting devices intended to be mounted in vehicle projectors exist and have already been the subject of patents.
  • Such a lighting device can produce a light beam for illuminating the road in front of the vehicle and having a rectilinear cut to separate a zone illuminated by said beam and an unlit area, so as not to dazzle the drivers of vehicles tracked or coming in the opposite direction.
  • Such a lighting device has the disadvantage of being able to produce only one type of light beam, such as for example, those emitted by low beam or high beam.
  • the patent application DE102007052696 discloses an optical system for a projector or a lighting device of a motor vehicle comprising two refractors and a lens.
  • the first refractor element comprises an input diopter and an output diopter. The light from this exit dioptre reaches the lens and exits to the projector's outer space.
  • the second refractor element has an input diopter, such that all the rays of light coming from this second input surface reach an intermediate reflecting diopter, which is located between the input diopter and the output diopter of the first element. refractor, and which returns said rays on the output diopter of the first refractor element.
  • a lighting device makes it possible to produce several types of light beams intended to fulfill different functions within a vehicle, while remaining compact in size due to a small number of parts involved.
  • the invention firstly relates to an optical lens comprising a first plane input diopter and an output diopter.
  • the main characteristic of a lens according to the invention is that it comprises a second non-coplanar planar entrance diopter with the first input diopter, and arranged in said lens so that all the rays coming from a point of this second input surface reaches an intermediate reflective diopter of the lens, which is located between the first input diopter and the output diopter, and which returns said rays on said output diopter.
  • a lens in association with light sources capable of illuminating the first and second input diopter, such a lens is configured to produce, by the output diopter, at least a first type of light beam coming directly from the first diopter of the light. input, and at least one second type of light beams from the second input diopter after reflection on the intermediate diopter.
  • this single lens provides several types of light beams, for example, to illuminate the road and to ensure a day signaling of the vehicle.
  • the geometry of this lens remains compact, since the second input diopter and the intermediate diopter are inserted between the first input diopter and the output diopter, without requiring an increase in the dimensions of said lens.
  • the two input dioptres are materialized by two plane surfaces forming an angle between them.
  • the first input diopter and the second input diopter are included in planes forming between them an angle of between 85 ° and 95 °.
  • This is a configuration easy to manufacture, and for which the trajectories of the light beams emitted by light sources illuminating said two input dioptres are well mastered.
  • the first input diopter extends in a plane which is substantially perpendicular to an axis connecting the center of said first diopter to the center of said output diopter, the second input diopter extending in a plane which is substantially parallel to said axis.
  • the output dioptre is a surface having two foci, the lens having an optical axis passing through these two foci.
  • one of these foci is positioned on the first diopter input, so that all the rays from this focus to the output dioptre, out of the lens by the output diopter being parallel to each other in a vertical plane parallel to or comprising the optical axis of the lens .
  • the exit diopter surface may be formed by an elliptical vertical generator sweeping a horizontal director, the latter may for example be an ellipse or a parabola.
  • This exit surface may for example be constructed in the same way as that of the lenses disclosed in the document EP2525142 .
  • the second input diopter and said intermediate diopter are placed on either side of the optical axis of the first input diopter.
  • the light beams emitted by a light source placed at the focus of the first input diopter and directed towards the exit diopter are located between the second input diopter and the intermediate diopter.
  • the intermediate diopter and the output diopter are arranged between them so as to create a focus at the second input diopter, so that all the rays starting from this focus and being reflected by the intermediate diopter towards the output dioptre, out of the lens being parallel to each other in a vertical plane parallel to or comprising the optical axis of the lens.
  • the output diopter is of ellipsoidal shape.
  • the major axis of the ellipse partially delimited by the output diopter coincides with the optical axis of the first input diopter.
  • the intermediate diopter is reflective by means of depositing a thin layer of aluminum.
  • an aluminum deposit can be performed on said intermediate diopter without disturbing the light beams from the first input diopter.
  • the subject of the invention is a lighting device for a vehicle, comprising a lens according to the invention.
  • the main characteristic of a lighting device is that it comprises at least a first light source capable of emitting light towards the first input diopter, and at least one second light source capable of to emit light towards the second input diopter, the light rays of the beams emitted by said first and second light sources are transmitted by the output diopter.
  • a lighting device according to the invention is intended to be mounted in a vehicle headlight.
  • a lighting device according to the invention implements a single optical lens according to the invention, to provide both a lighting function of the vehicle and a day signaling function of said vehicle.
  • Each of said functions can be indifferently provided by the first or second input diopter.
  • the luminous intensity of each light source is variable and can thus be adapted to the function it is intended to fill. It may for example be under-watted, if it is required to provide the day signaling of the vehicle.
  • the light rays transmitted by the output diopter form part of the road lighting beam or a day signaling beam of said vehicle, depending on whether they come from the first input surface, the second input surface or both of these dioptres.
  • each first light source and each second light source are constituted by a light emitting diode.
  • This is an effective embodiment in terms of light intensity, and space-saving because of the small size of the diodes compared to other types of light sources. It is possible for each light source cooperating with the lens according to the invention in the device according to the invention to be a light-emitting diode.
  • the light sources for example light-emitting diodes
  • the light sources are in contact with the input diopter which receives their light rays.
  • the exit diopter is formed by a surface admitting two foci, one of which is placed at the level of the input diopter, as previously described, the light rays emitted by the light sources emerge parallel to one another in a vertical plane parallel to or comprising the optical axis.
  • This exit surface may for example be constructed in the same way as that of the lenses disclosed in the document EP2525142 .
  • At least one first light source participates in the formation of the daylighting beam of the vehicle
  • at least one second light source in combination with the intermediate diopter participates in forming a portion of the light beam of the vehicle. the road.
  • each input diopter provides a different function, one for the illumination of the road, and the other for a day signaling of the vehicle.
  • the first diopter extends in a transverse and vertical plane and the second diopter extends in a horizontal plane.
  • said lighting device comprises two first light sources placed symmetrically with respect to a vertical and longitudinal plane intersecting the first diopter in the middle, said first sources making it possible to provide a vehicle day signaling function.
  • the concepts of "transverse”, “longitudinal”, “vertical” and “horizontal” are to be interpreted in relation to a frame linked to a vehicle in which a lighting device according to the invention would be mounted.
  • a lighting device comprises a first light source placed at a vertical and longitudinal plane intersecting the first diopter in its middle, said first source making it possible to provide a lighting function for the vehicle .
  • the first input diopter can also participate in the lighting function of the vehicle.
  • a lighting device comprises two second light sources placed symmetrically with respect to a vertical and longitudinal plane intersecting the second diopter in the middle, the beams coming from said second light sources being reflected by the intermediate diopter. before being transmitted by the output diopter to generate a lighting beam of the road.
  • the first light sources are placed on the same first plane printed circuit board.
  • the second light source or sources are not placed on this flat circuit board.
  • the second light sources are placed on the same second flat circuit board.
  • the first light source or sources are not placed on this flat circuit board.
  • the first input diopter is placed at the rear of the output diopter, the second input diopter and the intermediate reflecting diopter being positioned between said first input diopter and said output diopter, said intermediate diopter being located above said second entrance diopter.
  • the third object of the invention is a vehicle headlamp, the main feature of which is that it comprises a lighting device according to the invention.
  • a lighting device has the advantage of implementing a single multi-sided optical lens, and whose compact geometry can be exploited in association with suitable light sources, for perform a road lighting function and a vehicle day signaling function. Therefore, such a device is compact, and generates moderate costs by avoiding the establishment of several lenses each dedicated to a particular lighting function within the vehicle. Finally, it has the advantage of being able to produce a great variability of light beams according to the number and location of the associated light sources, to meet different needs and requirements in terms of lighting.
  • an optical lens and a lighting device will be made with respect to a frame linked to a vehicle in which said lens and said device are mounted, and for which the X axis materializes.
  • figure 6 is not a sectional view along a plane XZ, since the various diodes involved in a lighting device according to the invention are not all listed in the same vertical and longitudinal plane. This view is essentially to show the trajectory in a plane XZ of the different light beams emitted by the different first and second diodes.
  • an optical lens 1 according to the invention comprises a first input diopter 2, a second input diopter 3, an intermediate reflecting diopter 4 and an output diopter 5.
  • the first input diopter 2 is constituted by a planar face inscribed in a transverse and vertical plane YZ, and whose longitudinal axis extends in a transverse direction Y and horizontal.
  • This face 2 is constituted by a central portion 6 of low height and extending horizontally, said central portion 6 being extended at each of its two ends by an enlarged trapezoidal portion 7, projecting in height.
  • the central portion 6 comprises a central protuberance 20 of rounded shape and projecting also in height.
  • This first input diopter 2 constitutes the rearmost part of the optical lens 1.
  • the exit diopter 5 is for example a surface of ellipsoidal shape having a double curvature: a first curvature in a horizontal plane XY as shown by FIGS. figures 2 and 4 , and a second curvature in a vertical and longitudinal plane XZ as shown by figures 3 and 6 . More precisely, this output dioptre 5 constitutes an ellipsoid portion, of which a first focus F1 is situated at the level of the first input diopter 2 and whose second focus F2 is positioned within this output diopter 5. This diopter 5 is the foremost part of the optical lens 1.
  • the center of the output diopter 5 considered along a transverse axis Y and the center of the first input diopter 2 considered along a transverse axis Y, are aligned along a longitudinal axis X. More specifically, the lens 1 has a plane of symmetry vertical and longitudinal, passing through the points materializing said centers.
  • the second input diopter 3 is materialized by a rectangular face 8 and horizontal, and whose long side is parallel to a transverse axis Y.
  • the length of a large side of this rectangular face 8 is equal to the length of the first diopter input 2 considered along a transverse axis Y, and including the central portion 6 and the two trapezoidal portions 7.
  • the first 2 and the second 3 diopter input 2 are perpendicular, the second dioptre 3 constituting the lower part of the lens 1.
  • the reflecting intermediate diopter 4 is represented by an inclined wall that can be either rigorously flat, with a slight relief.
  • This wall 4 is substantially rectangular, the two long sides defining said wall 4 extending along a transverse axis Y, and the short sides being in planes forming an angle of the order of 45 ° with a vertical YZ plane.
  • This intermediate diopter 4 originates at the level of the horizontal upper edge of the central portion 6 of the first input diopter 2 and extends towards the front of the lens 1, towards the exit diopter 5.
  • the second diopter of input 3 and the intermediate diopter 4 are placed on either side of the optical axis of the first input diopter 1, said axis passing through a focus of said first diopter 2.
  • the intermediate diopter 4 and the output diopter 5 are arranged between them so as to create a focus at the second input diopter 3.
  • the first input diopter 2 constitutes the rearmost part of the lens 1 and the output dioptre 5 its foremost part, the intermediate diopter 4 and the second input diopter 3 being positioned between said first diopter 2 and said output diopter 5.
  • the intermediate diopter 4 is placed above the second input diopter 3.
  • the various diopters 2,3,4,5 are interconnected by means of transparent surfaces having no influence on the optical properties of the lens 1.
  • the reflective properties of the intermediate diopter 4 can be improved by means of aluminum deposition.
  • a lighting device comprises an optical lens 1 according to the invention, three first electroluminescent diodes 9, 10, 11 capable of emitting light towards the first input diopter 2, as well as two second diodes 12 , 13 electroluminescent capable of emitting light towards the second dioptre 3 input.
  • a light-emitting diode will be called LED ( Light Emitting Diode).
  • the two second LEDs 12, 13 are arranged on the second input diopter 3, symmetrically with respect to a vertical and longitudinal plane XZ intersecting said second diopter 3 at its center.
  • the light beams emitted 14 by said diodes 12,13 through the second input diopter 3, first reach the intermediate diopter 4, before being reflected towards the output diopter 5, then to be transmitted by said exit diopter 5 in parallel light beams.
  • the two second LEDs 12, 13 are placed at the centers of the second input diopter 3 defined by the intermediate diopter 4 and the output diopter 5.
  • the parallel beams transmitted by the output diopter 5 and which are emitted by the two second LEDs 12,13 placed at the foci of the second input diopter 3, are directed downwards, under a horizontal cutoff, to provide a smoothing function. vehicle lighting.
  • a lighting device comprises three first LED 9,10,11 able to emit light towards the first input diopter 2.
  • One of these three LEDs is located centrally on said first input diopter 2, at the central protuberance 20 of the central portion 6 of said diopter 2.
  • this first central LED 9 is placed at a focus of the first input diopter 2, so that the beams 15 that it emits and which pass through the first input diopter 2 are directly sent to the output diopter 5 which transmits them in beams of parallel light rays in a vertical plane.
  • the parallel light beams coming from the first central LED 9 and which are transmitted by the output diopter 5 are directed downwards, under a horizontal cutoff, to provide a lighting function of the vehicle.
  • the other two first LEDs 10,11 are arranged on the first input diopter 2, at the two trapezoidal end portions 7.
  • these first two LEDs 10,11 are arranged laterally on the first input diopter 2, and symmetrically with respect to the central LED 9, the height of said lateral LEDs 10,11 being lower than that of the central LED 9 .
  • the light beams 16 emitted by the first two LEDs 10, 11 in lateral position and which pass through the first input diopter 2, are sent directly to the output diopter 5, which transmits them towards the front of the lens 1.
  • the light beams 16 coming from the first two lateral LEDs 10, 11 and which are transmitted by the exit diopter 5, are directed both upwards and downwards, on either side of a horizontal cut, to provide a vehicle day signaling function.
  • the overall light beam produced by a lighting device according to the invention could be illustrated by a final diagram which would result from the superimposition of the three diagrams of the Figures 7,8 and 9 .
  • a lighting device by virtue of three first LEDs 9, 10, 11 capable of sending light towards the first input diopter 2 and thanks to two LEDs 12, 13 capable of send light to the second input diopter 3, can provide a lighting function and a vehicle day signaling function using a single optical lens 1.
  • a projector P according to the invention is schematically illustrated, with a housing B closed by a wall G, passing the beam emitted by the device 1 according to the invention.
  • This wall G is in particular a transparent ice. This scheme is generally applicable to the projector according to the invention.

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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 se rapporte à un dispositif d'éclairage d'un véhicule utilisant une lentille optique multifonction.The invention relates to a lighting device of a vehicle using a multifunction optical lens.

Des dispositifs d'éclairage destinés à être montés dans des projecteurs de véhicule, existent et ont déjà fait l'objet de brevets. On peut, par exemple, citer la demande de brevet EP2525142 qui se rapporte à un dispositif d'éclairage comprenant une lentille comportant un dioptre d'entrée et un dioptre de sortie et au moins une source de lumière capable d'émettre de la lumière vers ledit dioptre d'entrée. Un tel dispositif d'éclairage permet de produire un faisceau de lumière permettant d'éclairer la route devant le véhicule et présentant une coupure rectiligne permettant de séparer une zone éclairée par ledit faisceau et une zone non éclairée, afin de ne pas éblouir les conducteurs de véhicules suivis ou venant en sens inverse. Un tel dispositif d'éclairage présente l'inconvénient de ne pouvoir produire qu'un seul type de faisceau lumineux, comme par exemple, ceux émis par les feux de croisement ou les feux de route. Or, les véhicules actuels ont de plus en plus tendance à posséder au moins deux types de faisceaux lumineux, un premier type étant dédié à l'éclairage de la route par temps sombre ou de nuit, et un autre type étant consacré à la signalisation du véhicule de jour. Généralement, ce double besoin se règle au moyen d'au moins deux dispositifs lumineux distincts, placés dans un projecteur avant de véhicule, augmentant le temps de fabrication et le temps de montage desdits dispositifs dans ledit projecteur, et accroissant l'encombrement au sein desdits projecteurs.Lighting devices intended to be mounted in vehicle projectors, exist and have already been the subject of patents. One can, for example, quote the patent application EP2525142 which refers to a lighting device comprising a lens having an input diopter and an output diopter and at least one light source capable of emitting light to said input diopter. Such a lighting device can produce a light beam for illuminating the road in front of the vehicle and having a rectilinear cut to separate a zone illuminated by said beam and an unlit area, so as not to dazzle the drivers of vehicles tracked or coming in the opposite direction. Such a lighting device has the disadvantage of being able to produce only one type of light beam, such as for example, those emitted by low beam or high beam. However, current vehicles increasingly tend to have at least two types of light beams, one type being dedicated to lighting the road in dark weather or at night, and another type is dedicated to the signaling of the road. day vehicle. Generally, this dual need is regulated by means of at least two separate luminous devices, placed in a vehicle front projector, increasing the manufacturing time and mounting time of said devices in said projector, and increasing the bulk within said projectors.

La demande de brevet DE102007052696 divulgue un système optique pour un projecteur ou un dispositif d'éclairage d'un véhicule automobile comprenant deux éléments réfracteurs et une lentille. Le premier élément réfracteur comprend un dioptre d'entrée et un dioptre de sortie. La lumière issue de ce dioptre de sortie atteint la lentille et sort vers l'espace extérieur du projecteur. Le deuxième élément réfracteur a un dioptre d'entrée, tel que tous les rayons de la lumière issus de ce deuxième dioptre d'entrée atteignent un dioptre intermédiaire réfléchissant, qui est situé entre le dioptre d'entrée et le dioptre de sortie du premier élément réfracteur, et qui renvoie lesdits rayons sur le dioptre de sortie du premier élément réfracteur.The patent application DE102007052696 discloses an optical system for a projector or a lighting device of a motor vehicle comprising two refractors and a lens. The first refractor element comprises an input diopter and an output diopter. The light from this exit dioptre reaches the lens and exits to the projector's outer space. The second refractor element has an input diopter, such that all the rays of light coming from this second input surface reach an intermediate reflecting diopter, which is located between the input diopter and the output diopter of the first element. refractor, and which returns said rays on the output diopter of the first refractor element.

Un dispositif d'éclairage selon l'invention permet de produire plusieurs types de faisceaux lumineux destinés à remplir des fonctions différentes au sein d'un véhicule, tout en demeurant d'un encombrement compact en raison d'un nombre restreint de pièces impliquées.A lighting device according to the invention makes it possible to produce several types of light beams intended to fulfill different functions within a vehicle, while remaining compact in size due to a small number of parts involved.

L'invention a pour premier objet une Lentille optique comprenant un premier dioptre d'entrée plan et un dioptre de sortie.The invention firstly relates to an optical lens comprising a first plane input diopter and an output diopter.

La principale caractéristique d'une lentille selon l'invention, est qu'elle comprend un deuxième dioptre d'entrée plan non coplanaire avec le premier dioptre d'entrée, et agencé dans ladite lentille pour que tous les rayons issus d'un point de ce deuxième dioptre d'entrée atteignent un dioptre intermédiaire réfléchissant de la lentille, qui est situé entre le premier dioptre d'entrée et le dioptre de sortie, et qui renvoie lesdits rayons sur le ledit dioptre de sortie. De cette manière, en association avec des sources lumineuses aptes à éclairer le premier et le deuxième dioptre d'entrée, une telle lentille est configurée pour produire par le dioptre de sortie, au moins un premier type de faisceaux lumineux issus directement du premier dioptre d'entrée, et au moins un deuxième type de faisceaux lumineux issus du deuxième dioptre d'entrée après une réflexion sur le dioptre intermédiaire. Ainsi, grâce à cette lentille unique, plusieurs types de faisceaux lumineux peuvent être émis, pour par exemple, éclairer la route et pour assurer une signalisation de jour du véhicule. La géométrie de cette lentille demeure compacte, puisque le deuxième dioptre d'entrée et le dioptre intermédiaire sont insérés entre le premier dioptre d'entrée et le dioptre de sortie, sans nécessiter un accroissement des dimensions de ladite lentille. Les deux dioptres d'entrée sont matérialisés par deux surfaces planes faisant un angle entre elles.The main characteristic of a lens according to the invention is that it comprises a second non-coplanar planar entrance diopter with the first input diopter, and arranged in said lens so that all the rays coming from a point of this second input surface reaches an intermediate reflective diopter of the lens, which is located between the first input diopter and the output diopter, and which returns said rays on said output diopter. In this way, in association with light sources capable of illuminating the first and second input diopter, such a lens is configured to produce, by the output diopter, at least a first type of light beam coming directly from the first diopter of the light. input, and at least one second type of light beams from the second input diopter after reflection on the intermediate diopter. Thus, thanks to this single lens, several types of light beams can be emitted, for example, to illuminate the road and to ensure a day signaling of the vehicle. The geometry of this lens remains compact, since the second input diopter and the intermediate diopter are inserted between the first input diopter and the output diopter, without requiring an increase in the dimensions of said lens. The two input dioptres are materialized by two plane surfaces forming an angle between them.

Avantageusement, le premier dioptre d'entrée et le deuxième dioptre d'entrée sont compris dans des plans faisant entre eux un angle compris entre 85° et 95°. Il s'agit d'une configuration facile à fabriquer, et pour laquelle les trajectoires des faisceaux lumineux émis par des sources lumineuses éclairant lesdits deux dioptres d'entrée sont bien maitrisées. De façon préférentielle, le premier dioptre d'entrée s'étend dans un plan qui est sensiblement perpendiculaire à un axe reliant le centre dudit premier dioptre au centre dudit dioptre de sortie, le deuxième dioptre d'entrée s'étendant dans un plan qui est sensiblement parallèle audit axe.Advantageously, the first input diopter and the second input diopter are included in planes forming between them an angle of between 85 ° and 95 °. This is a configuration easy to manufacture, and for which the trajectories of the light beams emitted by light sources illuminating said two input dioptres are well mastered. Preferably, the first input diopter extends in a plane which is substantially perpendicular to an axis connecting the center of said first diopter to the center of said output diopter, the second input diopter extending in a plane which is substantially parallel to said axis.

Selon une réalisation de l'invention, le dioptre de sortie est une surface présentant deux foyers, la lentille présentant un axe optique passant par ces deux foyers. Avantageusement l'un de ces foyers est positionné sur le premier dioptre d'entrée, de sorte que tous les rayons partant de ce foyer vers le dioptre de sortie, sortent de la lentille par le dioptre de sortie en étant parallèles entre eux dans un plan vertical parallèle à ou comprenant l'axe optique de la lentille. Ainsi la surface de dioptre de sortie peut être formée par une génératrice verticale elliptique balayant une directrice horizontale, cette dernière pouvant par exemple être une ellipse ou une parabole. Ce dioptre de sortie peut être par exemple construit de la même manière que celui des lentilles divulguées dans le document EP2525142 .According to one embodiment of the invention, the output dioptre is a surface having two foci, the lens having an optical axis passing through these two foci. Advantageously, one of these foci is positioned on the first diopter input, so that all the rays from this focus to the output dioptre, out of the lens by the output diopter being parallel to each other in a vertical plane parallel to or comprising the optical axis of the lens . Thus the exit diopter surface may be formed by an elliptical vertical generator sweeping a horizontal director, the latter may for example be an ellipse or a parabola. This exit surface may for example be constructed in the same way as that of the lenses disclosed in the document EP2525142 .

Préférentiellement, le deuxième dioptre d'entrée et ledit dioptre intermédiaire sont placés de part et d'autre de l'axe optique du premier dioptre d'entrée. Autrement dit, les faisceaux lumineux émis par une source lumineuse placée au foyer du premier dioptre d'entrée et dirigés vers le dioptre de sortie sont situés entre le deuxième dioptre d'entrée et le dioptre intermédiaire.Preferably, the second input diopter and said intermediate diopter are placed on either side of the optical axis of the first input diopter. In other words, the light beams emitted by a light source placed at the focus of the first input diopter and directed towards the exit diopter are located between the second input diopter and the intermediate diopter.

De façon avantageuse, le dioptre intermédiaire et le dioptre de sortie sont agencés entre eux de manière à créer un foyer au niveau du deuxième dioptre d'entrée, de sorte que tous les rayons partant de ce foyer et étant réfléchis par le dioptre intermédiaire vers le dioptre de sortie, sortent de la lentille en étant parallèles entre eux dans un plan vertical parallèle à ou comprenant l'axe optique de la lentille.Advantageously, the intermediate diopter and the output diopter are arranged between them so as to create a focus at the second input diopter, so that all the rays starting from this focus and being reflected by the intermediate diopter towards the output dioptre, out of the lens being parallel to each other in a vertical plane parallel to or comprising the optical axis of the lens.

Avantageusement, le dioptre de sortie est de forme ellipsoïdale. Avantageusement, le grand axe de l'ellipse partiellement délimitée par le dioptre de sortie est confondu avec l'axe optique du premier dioptre d'entrée.Advantageously, the output diopter is of ellipsoidal shape. Advantageously, the major axis of the ellipse partially delimited by the output diopter coincides with the optical axis of the first input diopter.

De façon préférentielle, le dioptre intermédiaire est réfléchissant au moyen du dépôt d'une fine couche d'aluminium. En effet, afin d'améliorer les propriétés réfléchissantes du dioptre intermédiaire, un dépôt d'aluminium peut être effectué sur ledit dioptre intermédiaire sans perturber les faisceaux lumineux en provenance du premier dioptre d'entrée.Preferably, the intermediate diopter is reflective by means of depositing a thin layer of aluminum. Indeed, in order to improve the reflective properties of the intermediate diopter, an aluminum deposit can be performed on said intermediate diopter without disturbing the light beams from the first input diopter.

L'invention a pour deuxième objet un dispositif d'éclairage pour un véhicule, comprenant une lentille selon l'invention.The subject of the invention is a lighting device for a vehicle, comprising a lens according to the invention.

La principale caractéristique d'un dispositif d'éclairage selon l'invention, est qu'il comprend au moins une première source lumineuse capable d'émettre de la lumière vers le premier dioptre d'entrée, et au moins une deuxième source lumineuse capable d'émettre de la lumière vers le deuxième dioptre d'entrée, les rayons lumineux des faisceaux émis par lesdites première et deuxième sources lumineuses sont transmis par le dioptre de sortie. Il est supposé qu'un dispositif d'éclairage selon l'invention est destiné à être monté dans un projecteur avant de véhicule. De cette manière, un dispositif d'éclairage selon l'invention met en oeuvre une lentille optique unique selon l'invention, pour assurer à la fois une fonction d'éclairage du véhicule et une fonction de signalisation de jour dudit véhicule. Chacune desdites fonctions peut indifféremment être assurée par le premier ou le deuxième dioptre d'entrée. L'intensité lumineuse de chaque source lumineuse est variable et peut ainsi être adaptée à la fonction qu'elle est destinée à remplir. Elle peut être par exemple sous-wattée, si elle est amenée à assurer la signalisation de jour du véhicule.The main characteristic of a lighting device according to the invention is that it comprises at least a first light source capable of emitting light towards the first input diopter, and at least one second light source capable of to emit light towards the second input diopter, the light rays of the beams emitted by said first and second light sources are transmitted by the output diopter. It is assumed that a lighting device according to the invention is intended to be mounted in a vehicle headlight. In this way, a lighting device according to the invention implements a single optical lens according to the invention, to provide both a lighting function of the vehicle and a day signaling function of said vehicle. Each of said functions can be indifferently provided by the first or second input diopter. The luminous intensity of each light source is variable and can thus be adapted to the function it is intended to fill. It may for example be under-watted, if it is required to provide the day signaling of the vehicle.

Avantageusement, les rayons lumineux transmis par le dioptre de sortie forment une partie de faisceau d'éclairage de la route ou un faisceau de signalisation de jour dudit véhicule, selon qu'ils proviennent du premier dioptre d'entrée, du deuxième dioptre d'entrée ou à la fois de ces deux dioptres.Advantageously, the light rays transmitted by the output diopter form part of the road lighting beam or a day signaling beam of said vehicle, depending on whether they come from the first input surface, the second input surface or both of these dioptres.

Selon une réalisation de l'invention, chaque première source lumineuse et chaque deuxième source lumineuse sont constituées par une diode électroluminescente. Il s'agit d'un mode de réalisation performant en matière d'intensité lumineuse, et peu encombrant en raison de la taille réduite des diodes par rapport aux autres types de sources lumineuses. Il est possible que chaque source lumineuse coopérant avec la lentille selon l'invention dans le dispositif selon l'invention, soit une diode électroluminescente.According to one embodiment of the invention, each first light source and each second light source are constituted by a light emitting diode. This is an effective embodiment in terms of light intensity, and space-saving because of the small size of the diodes compared to other types of light sources. It is possible for each light source cooperating with the lens according to the invention in the device according to the invention to be a light-emitting diode.

Avantageusement les sources lumineuses, par exemple des diodes électroluminescentes, sont en contact avec le dioptre d'entrée qui reçoit leurs rayons lumineux. Lorsque le dioptre de sortie est formé par une surface admettant deux foyers, dont un placé au niveau du dioptre d'entrée, comme précédemment décrit, les rayons lumineux émis par les sources lumineuses ressortent parallèles entre eux dans un plan vertical parallèle à ou comprenant l'axe optique. Ce dioptre de sortie peut être par exemple construit de la même manière que celui des lentilles divulguées dans le document EP2525142 .Advantageously, the light sources, for example light-emitting diodes, are in contact with the input diopter which receives their light rays. When the exit diopter is formed by a surface admitting two foci, one of which is placed at the level of the input diopter, as previously described, the light rays emitted by the light sources emerge parallel to one another in a vertical plane parallel to or comprising the optical axis. This exit surface may for example be constructed in the same way as that of the lenses disclosed in the document EP2525142 .

De façon préférentielle, au moins une première source lumineuse participe à la formation du faisceau de signalisation de jour du véhicule, et au moins une deuxième source lumineuse en combinaison avec le dioptre intermédiaire participe à la formation d'une partie de faisceau d'éclairage de la route.Preferably, at least one first light source participates in the formation of the daylighting beam of the vehicle, and at least one second light source in combination with the intermediate diopter participates in forming a portion of the light beam of the vehicle. the road.

De cette manière, chaque dioptre d'entrée assure une fonction différente, l'une pour l'éclairage de la route, et l'autre pour une signalisation de jour du véhicule.In this way, each input diopter provides a different function, one for the illumination of the road, and the other for a day signaling of the vehicle.

Préférentiellement, le premier dioptre s'étend dans un plan transversal et vertical et le deuxième dioptre s'étend dans un plan horizontal.Preferably, the first diopter extends in a transverse and vertical plane and the second diopter extends in a horizontal plane.

Avantageusement, ledit dispositif d'éclairage comprend deux premières sources lumineuses placées de façon symétrique par rapport à un plan vertical et longitudinal coupant le premier dioptre en son milieu, lesdites premières sources permettant d'assurer une fonction de signalisation de jour du véhicule. Les notions de « transversal », « longitudinal », « vertical » et « horizontal » sont à interpréter par rapport à un référentiel lié à un véhicule dans lequel serait monté un dispositif d'éclairage selon l'invention.Advantageously, said lighting device comprises two first light sources placed symmetrically with respect to a vertical and longitudinal plane intersecting the first diopter in the middle, said first sources making it possible to provide a vehicle day signaling function. The concepts of "transverse", "longitudinal", "vertical" and "horizontal" are to be interpreted in relation to a frame linked to a vehicle in which a lighting device according to the invention would be mounted.

De façon avantageuse, un dispositif d'éclairage selon l'invention comprend une première source lumineuse placée au niveau d'un plan vertical et longitudinal coupant le premier dioptre en son milieu, ladite première source permettant d'assurer une fonction d'éclairage du véhicule. Autrement dit, outre une fonction de signalisation de jour du véhicule, le premier dioptre d'entrée peut également participer à la fonction d'éclairage du véhicule.Advantageously, a lighting device according to the invention comprises a first light source placed at a vertical and longitudinal plane intersecting the first diopter in its middle, said first source making it possible to provide a lighting function for the vehicle . In other words, in addition to a vehicle day signaling function, the first input diopter can also participate in the lighting function of the vehicle.

Avantageusement, un dispositif d'éclairage selon l'invention, comprend deux deuxièmes sources lumineuses placées de façon symétrique par rapport à un plan vertical et longitudinal coupant le deuxième dioptre en son milieu, les faisceaux issus desdites deuxièmes sources lumineuses étant réfléchis par le dioptre intermédiaire avant d'être transmis par le dioptre de sortie pour générer un faisceau d'éclairage de la route.Advantageously, a lighting device according to the invention comprises two second light sources placed symmetrically with respect to a vertical and longitudinal plane intersecting the second diopter in the middle, the beams coming from said second light sources being reflected by the intermediate diopter. before being transmitted by the output diopter to generate a lighting beam of the road.

Selon une réalisation de l'invention, les premières sources lumineuses sont placées sur une même première carte de circuit imprimé plane. Avantageusement, la ou les deuxièmes sources lumineuses ne sont pas placées sur cette carte de circuit imprimé plane.According to one embodiment of the invention, the first light sources are placed on the same first plane printed circuit board. Advantageously, the second light source or sources are not placed on this flat circuit board.

Selon une réalisation de l'invention, les deuxièmes sources lumineuses sont placées sur une même deuxième carte de circuit imprimé plane. Avantageusement, la ou les premières sources lumineuses ne sont pas placées sur cette carte de circuit imprimé plane.According to one embodiment of the invention, the second light sources are placed on the same second flat circuit board. Advantageously, the first light source or sources are not placed on this flat circuit board.

De façon préférentielle, le premier dioptre d'entrée est placé à l'arrière du dioptre de sortie, le deuxième dioptre d'entrée et le dioptre intermédiaire réfléchissant étant positionnés entre ledit premier dioptre d'entrée et ledit dioptre de sortie, ledit dioptre intermédiaire étant situé au-dessus dudit deuxième dioptre d'entrée.Preferably, the first input diopter is placed at the rear of the output diopter, the second input diopter and the intermediate reflecting diopter being positioned between said first input diopter and said output diopter, said intermediate diopter being located above said second entrance diopter.

Dans la présente demande, les termes au-dessus, au-dessous, dessus, dessous, inférieur, supérieur sont en référence à la position dans laquelle la lentille ou le dispositif selon l'invention sont destinés à fonctionner à l'intérieur d'un véhicule.In the present application, the terms above, below, above, below, below, and above are in reference to the position in which the lens or device according to the invention is intended to function within a vehicle.

L'invention a pour troisième objet un projecteur avant de véhicule, dont la principale caractéristique est qu'il comprend un dispositif d'éclairage selon l'invention.The third object of the invention is a vehicle headlamp, the main feature of which is that it comprises a lighting device according to the invention.

Un dispositif d'éclairage selon l'invention présente l'avantage de mettre en oeuvre une seule lentille optique multi faces, et dont la géométrie compacte peut être exploitée en association avec des sources lumineuses adaptées, pour remplir une fonction d'éclairage de la route et une fonction de signalisation de jour du véhicule. Par conséquent, un tel dispositif est peu encombrant, et engendre des coûts modérés en évitant la mise en place de plusieurs lentilles dédiées chacune à une fonction particulière d'éclairage au sein du véhicule. Il présente enfin, l'avantage de pouvoir produire une grande variabilité de faisceaux lumineux en fonction du nombre et de l'emplacement des sources lumineuses associées, pour répondre à différents besoins et exigences en matière d'éclairage.A lighting device according to the invention has the advantage of implementing a single multi-sided optical lens, and whose compact geometry can be exploited in association with suitable light sources, for perform a road lighting function and a vehicle day signaling function. Therefore, such a device is compact, and generates moderate costs by avoiding the establishment of several lenses each dedicated to a particular lighting function within the vehicle. Finally, it has the advantage of being able to produce a great variability of light beams according to the number and location of the associated light sources, to meet different needs and requirements in terms of lighting.

On donne, ci-après, une description détaillée d'un mode de réalisation préféré d'une lentille optique et d'un dispositif d'éclairage selon l'invention en se référant aux figures 1 à 9.

  • La figure 1 est une vue en perspective d'une lentille optique selon l'invention,
  • La figure 2 est une du dessous de la lentille de la figure 1, montrant deux deuxièmes diodes d'un dispositif d'éclairage selon l'invention,
  • La figure 3 est une vue en coupe de la lentille de la figure 1, dans un plan XZ passant par une deuxième diode d'un dispositif d'éclairage selon l'invention et montrant la trajectoire des faisceaux lumineux émis par lesdites deuxièmes diodes,
  • La figure 4 est une du dessus de la lentille de la figure 1, montrant trois premières diodes d'un dispositif d'éclairage selon l'invention,
  • La figure 5 est une vue de derrière de la lentille optique de la figure 1, montrant trois premières diodes et deux deuxièmes diodes d'un système d'éclairage selon l'invention,
  • La figure 6 est une vue schématique de côté de la lentille de la figure 1 montant la trajectoire des faisceaux lumineux émis par les trois premières diodes d'un dispositif d'éclairage selon l'invention.
  • La figure 7 illustre un diagramme isolux d'un faisceau lumineux produit par les deux deuxièmes diodes d'un dispositif d'éclairage selon l'invention,
  • La figure 8 illustre un diagramme isolux d'un faisceau lumineux produit par une première diode centrale d'un dispositif d'éclairage selon l'invention,
  • La figure 9 illustre un diagramme isolux d'un faisceau lumineux produit par deux premières diodes latérales d'un dispositif d'éclairage selon l'invention,
  • La figure 10 est un schéma illustrant un projecteur de véhicule selon l'invention.
The following is a detailed description of a preferred embodiment of an optical lens and a lighting device according to the invention with reference to the Figures 1 to 9 .
  • The figure 1 is a perspective view of an optical lens according to the invention,
  • The figure 2 is one of the underside of the lens of the figure 1 , showing two second diodes of a lighting device according to the invention,
  • The figure 3 is a sectional view of the lens of the figure 1 in an XZ plane passing through a second diode of a lighting device according to the invention and showing the path of the light beams emitted by said second diodes,
  • The figure 4 is one of the top of the lens of the figure 1 , showing three first diodes of a lighting device according to the invention,
  • The figure 5 is a back view of the optical lens of the figure 1 , showing three first diodes and two second diodes of a lighting system according to the invention,
  • The figure 6 is a schematic side view of the lens of the figure 1 mounting the path of the light beams emitted by the first three diodes of a lighting device according to the invention.
  • The figure 7 illustrates an isolux diagram of a light beam produced by the two second diodes of a lighting device according to the invention,
  • The figure 8 illustrates an isolux diagram of a light beam produced by a first central diode of a lighting device according to the invention,
  • The figure 9 illustrates an isolux diagram of a light beam produced by two first lateral diodes of a lighting device according to the invention,
  • The figure 10 is a diagram illustrating a vehicle headlight according to the invention.

La description d'une lentille optique et d'un dispositif d'éclairage selon l'invention va s'effectuer par rapport à un référentiel lié à un véhicule dans lequel ladite lentille et ledit dispositif seraient montés, et pour lequel l'axe X matérialise un axe longitudinal du véhicule, l'axe Y un axe transversal du véhicule et l'axe Z un axe vertical.The description of an optical lens and a lighting device according to the invention will be made with respect to a frame linked to a vehicle in which said lens and said device are mounted, and for which the X axis materializes. a longitudinal axis of the vehicle, the Y axis a transverse axis of the vehicle and the Z axis a vertical axis.

Il est important de préciser que la figure 6 n'est pas une vue en coupe selon un plan XZ, puisque les différentes diodes impliquées dans un dispositif d'éclairage selon l'invention, ne sont pas toutes inscrites dans un même plan vertical et longitudinal. Cette vue a pour but essentiel de montrer la trajectoire dans un plan XZ des différents faisceaux lumineux émis par les différentes premières et deuxièmes diodes.It is important to clarify that the figure 6 is not a sectional view along a plane XZ, since the various diodes involved in a lighting device according to the invention are not all listed in the same vertical and longitudinal plane. This view is essentially to show the trajectory in a plane XZ of the different light beams emitted by the different first and second diodes.

En se référant à la figure 1, une lentille optique 1 selon l'invention comprend un premier dioptre d'entrée 2, un deuxième dioptre 3 d'entrée, un dioptre intermédiaire réfléchissant 4 et un dioptre de sortie 5.Referring to the figure 1 an optical lens 1 according to the invention comprises a first input diopter 2, a second input diopter 3, an intermediate reflecting diopter 4 and an output diopter 5.

En se référant aux figures 1 et 5, le premier dioptre d'entrée 2 est constitué par une face plane inscrite dans un plan transversal et vertical YZ, et dont l'axe longitudinal s'étend selon une direction transversale Y et horizontale. Cette face 2 est constituée par une partie centrale 6 de faible hauteur et s'étendant horizontalement, ladite partie centrale 6 étant prolongée à chacune de ses deux extrémités par une partie trapézoïdale 7 élargie, saillant en hauteur. La partie centrale 6 comprend une protubérance centrale 20 de forme arrondie et saillant également en hauteur. Ce premier dioptre d'entrée 2 constitue la partie la plus en arrière de la lentille optique 1.Referring to figures 1 and 5 , the first input diopter 2 is constituted by a planar face inscribed in a transverse and vertical plane YZ, and whose longitudinal axis extends in a transverse direction Y and horizontal. This face 2 is constituted by a central portion 6 of low height and extending horizontally, said central portion 6 being extended at each of its two ends by an enlarged trapezoidal portion 7, projecting in height. The central portion 6 comprises a central protuberance 20 of rounded shape and projecting also in height. This first input diopter 2 constitutes the rearmost part of the optical lens 1.

Le dioptre de sortie 5 est par exemple une surface de forme ellipsoïdale présentant une double courbure : une première courbure dans un plan horizontal XY comme le montrent les figures 2 et 4, et une deuxième courbure dans un plan vertical et longitudinal XZ comme le montrent les figures 3 et 6. Plus précisément, ce dioptre de sortie 5 constitue une portion d'ellipsoïde, dont un premier foyer F1 est situé au niveau du premier dioptre d'entrée 2 et dont le deuxième foyer F2 est positionné au sein de ce dioptre de sortie 5. Ce dioptre de sortie 5 constitue la partie la plus en avant de la lentille optique 1.The exit diopter 5 is for example a surface of ellipsoidal shape having a double curvature: a first curvature in a horizontal plane XY as shown by FIGS. figures 2 and 4 , and a second curvature in a vertical and longitudinal plane XZ as shown by figures 3 and 6 . More precisely, this output dioptre 5 constitutes an ellipsoid portion, of which a first focus F1 is situated at the level of the first input diopter 2 and whose second focus F2 is positioned within this output diopter 5. This diopter 5 is the foremost part of the optical lens 1.

En se référant aux figures 2 et 4, le centre du dioptre de sortie 5 considéré suivant un axe transversal Y et le centre du premier dioptre d'entrée 2 considéré suivant un axe transversal Y, sont alignés suivant un axe longitudinal X. Plus précisément, la lentille 1 présente un plan de symétrie vertical et longitudinal, passant par les points matérialisant lesdits centres.Referring to figures 2 and 4 , the center of the output diopter 5 considered along a transverse axis Y and the center of the first input diopter 2 considered along a transverse axis Y, are aligned along a longitudinal axis X. More specifically, the lens 1 has a plane of symmetry vertical and longitudinal, passing through the points materializing said centers.

En se référant à la figure 2, le deuxième dioptre d'entrée 3 est matérialisé par une face rectangulaire 8 et horizontale, et dont le grand côté est parallèle à un axe transversal Y. La longueur d'un grand côté de cette face 8 rectangulaire, est égal à la longueur du premier dioptre d'entrée 2 considérée suivant un axe transversal Y, et incluant la partie centrale 6 et les deux parties trapézoïdales 7. Le premier 2 et le deuxième 3 dioptre d'entrée 2 sont perpendiculaires, le deuxième dioptre 3 constituant la partie inférieure de la lentille 1.Referring to the figure 2 , the second input diopter 3 is materialized by a rectangular face 8 and horizontal, and whose long side is parallel to a transverse axis Y. The length of a large side of this rectangular face 8 is equal to the length of the first diopter input 2 considered along a transverse axis Y, and including the central portion 6 and the two trapezoidal portions 7. The first 2 and the second 3 diopter input 2 are perpendicular, the second dioptre 3 constituting the lower part of the lens 1.

En se référant aux figures 1, 3, 4, 5 et 6 le dioptre 4 intermédiaire réfléchissant est représenté par une paroi inclinée pouvant être, soit rigoureusement plane, soit dotée d'un léger relief. Cette paroi 4 est sensiblement rectangulaire, les deux grands côtés délimitant ladite paroi 4 s'étendant suivant un axe transversal Y, et les petits côtés s'inscrivant dans des plans faisant un angle de l'ordre de 45° avec un plan YZ vertical. Ce dioptre 4 intermédiaire prend naissance au niveau du bord supérieur horizontal de la partie centrale 6 du premier dioptre d'entrée 2 et s'étend vers l'avant de la lentille 1, en direction du dioptre de sortie 5. Le deuxième dioptre d'entrée 3 et le dioptre intermédiaire 4 sont placées de part et d'autre de l'axe optique du premier dioptre d'entrée 1, ledit axe passant par un foyer dudit premier dioptre 2. Le dioptre 4 intermédiaire et le dioptre de sortie 5 sont agencés entre eux de manière à créer un foyer au niveau du deuxième dioptre d'entrée 3.Referring to figures 1 , 3, 4, 5 and 6 the reflecting intermediate diopter 4 is represented by an inclined wall that can be either rigorously flat, with a slight relief. This wall 4 is substantially rectangular, the two long sides defining said wall 4 extending along a transverse axis Y, and the short sides being in planes forming an angle of the order of 45 ° with a vertical YZ plane. This intermediate diopter 4 originates at the level of the horizontal upper edge of the central portion 6 of the first input diopter 2 and extends towards the front of the lens 1, towards the exit diopter 5. The second diopter of input 3 and the intermediate diopter 4 are placed on either side of the optical axis of the first input diopter 1, said axis passing through a focus of said first diopter 2. The intermediate diopter 4 and the output diopter 5 are arranged between them so as to create a focus at the second input diopter 3.

En résumé, le premier dioptre 2 d'entrée constitue la partie la plus en arrière de la lentille 1 et le dioptre de sortie 5 sa partie la plus en avant, le dioptre intermédiaire 4 et le deuxième dioptre d'entrée 3 étant positionnés entre ledit premier dioptre 2 et ledit dioptre de sortie 5. Préférentiellement, le dioptre 4 intermédiaire est placé au dessus du deuxième dioptre d'entrée 3. Les différents dioptres 2,3,4,5 sont reliés entre eux au moyen de surfaces transparentes n'ayant aucune influence sur les propriétés optiques de la lentille 1.In summary, the first input diopter 2 constitutes the rearmost part of the lens 1 and the output dioptre 5 its foremost part, the intermediate diopter 4 and the second input diopter 3 being positioned between said first diopter 2 and said output diopter 5. Preferably, the intermediate diopter 4 is placed above the second input diopter 3. The various diopters 2,3,4,5 are interconnected by means of transparent surfaces having no influence on the optical properties of the lens 1.

Les propriétés réfléchissantes du dioptre 4 intermédiaire peuvent être améliorées au moyen d'un dépôt d'aluminium.The reflective properties of the intermediate diopter 4 can be improved by means of aluminum deposition.

Un dispositif d'éclairage selon l'invention comprend une lentille 1 optique selon l'invention, trois premières diodes électroluminescentes 9,10,11 capables d'émettre de la lumière vers le premier dioptre d'entrée 2, ainsi que deux deuxièmes diodes 12,13 électroluminescentes capables d'émettre de la lumière vers le deuxième dioptre 3 d'entrée. Pour la suite de la description une diode électroluminescente sera dénommée LED (de l'anglais « Light Emitting Diode »). A lighting device according to the invention comprises an optical lens 1 according to the invention, three first electroluminescent diodes 9, 10, 11 capable of emitting light towards the first input diopter 2, as well as two second diodes 12 , 13 electroluminescent capable of emitting light towards the second dioptre 3 input. For the rest of the description, a light-emitting diode will be called LED ( Light Emitting Diode).

En se référant à la figure 2, les deux deuxièmes LED 12,13 sont disposées sur le deuxième dioptre d'entrée 3, de façon symétrique par rapport à un plan vertical et longitudinal XZ coupant ledit deuxième dioptre 3 en son centre.Referring to the figure 2 , the two second LEDs 12, 13 are arranged on the second input diopter 3, symmetrically with respect to a vertical and longitudinal plane XZ intersecting said second diopter 3 at its center.

En se référant à la figure 3, les faisceaux lumineux émis 14 par lesdites diodes 12,13 à travers le deuxième dioptre d'entrée 3, atteignent d'abord le dioptre intermédiaire 4, avant d'être réfléchis vers le dioptre de sortie 5, puis d'être transmis par ledit dioptre de sortie 5 en faisceaux lumineux parallèles. Les deux deuxièmes LED 12,13 sont placées aux foyers du deuxième dioptre d'entrée 3 définis par le dioptre 4 intermédiaire et le dioptre de sortie 5.Referring to the figure 3 the light beams emitted 14 by said diodes 12,13 through the second input diopter 3, first reach the intermediate diopter 4, before being reflected towards the output diopter 5, then to be transmitted by said exit diopter 5 in parallel light beams. The two second LEDs 12, 13 are placed at the centers of the second input diopter 3 defined by the intermediate diopter 4 and the output diopter 5.

En se référant à la figure 7, les faisceaux parallèles transmis par le dioptre de sortie 5 et qui sont émis par les deux deuxièmes LED 12,13 placées aux foyers du deuxième dioptre d'entrée 3, sont dirigés vers le bas, sous une coupure horizontale, pour assurer une fonction d'éclairage du véhicule.Referring to the figure 7 , the parallel beams transmitted by the output diopter 5 and which are emitted by the two second LEDs 12,13 placed at the foci of the second input diopter 3, are directed downwards, under a horizontal cutoff, to provide a smoothing function. vehicle lighting.

En se référant aux figures 2, 4, 5 et 6, un dispositif d'éclairage selon l'invention comprend trois premières LED 9,10,11 capables d'émettre de la lumière vers le premier dioptre 2 d'entrée. L'une 9 de ces trois LED se retrouve en position centrale sur ledit premier dioptre d'entrée 2, au niveau de la protubérance centrale 20 de la partie centrale 6 dudit dioptre 2.Referring to figures 2 , 4 , 5 and 6 , a lighting device according to the invention comprises three first LED 9,10,11 able to emit light towards the first input diopter 2. One of these three LEDs is located centrally on said first input diopter 2, at the central protuberance 20 of the central portion 6 of said diopter 2.

En se référant à la figure 6, cette première LED centrale 9 est placée à un foyer du premier dioptre d'entrée 2, si bien que les faisceaux 15 qu'elle émet et qui passent à travers le premier dioptre d'entrée 2 sont directement envoyés vers le dioptre de sortie 5, qui les transmet en faisceaux de rayons lumineux parallèles selon un plan vertical.Referring to the figure 6 this first central LED 9 is placed at a focus of the first input diopter 2, so that the beams 15 that it emits and which pass through the first input diopter 2 are directly sent to the output diopter 5 which transmits them in beams of parallel light rays in a vertical plane.

En se référant à la figure 8, les faisceaux lumineux parallèles issus de la première LED 9 centrale et qui sont transmis par le dioptre de sortie 5 sont dirigés vers le bas, sous une coupure horizontale, afin d'assurer une fonction d'éclairage du véhicule.Referring to the figure 8 the parallel light beams coming from the first central LED 9 and which are transmitted by the output diopter 5 are directed downwards, under a horizontal cutoff, to provide a lighting function of the vehicle.

En se référant aux figures 2, 4, 5, et 6 les deux autres premières LED 10,11 sont disposées sur le premier dioptre d'entrée 2, au niveau des deux parties d'extrémités 7 trapézoïdales. Ainsi, ces deux premières LED 10,11 sont disposées latéralement sur le premier dioptre d'entrée 2, et de façon symétrique par rapport à la LED centrale 9, la hauteur desdites LED latérales 10,11 étant inférieure à celle de la LED centrale 9.Referring to figures 2 , 4 , 5 , and 6 the other two first LEDs 10,11 are arranged on the first input diopter 2, at the two trapezoidal end portions 7. Thus, these first two LEDs 10,11 are arranged laterally on the first input diopter 2, and symmetrically with respect to the central LED 9, the height of said lateral LEDs 10,11 being lower than that of the central LED 9 .

En se référant à la figure 6, les faisceaux lumineux 16 émis par les deux premières LED 10,11 en position latérale et qui passent à travers le premier dioptre d'entrée 2, sont directement envoyés vers le dioptre de sortie 5, qui les transmet vers l'avant de la lentille 1.Referring to the figure 6 , the light beams 16 emitted by the first two LEDs 10, 11 in lateral position and which pass through the first input diopter 2, are sent directly to the output diopter 5, which transmits them towards the front of the lens 1.

En se référant à la figure 9, les faisceaux lumineux 16 issus des deux premières LED 10,11 latérales et qui sont transmis par le dioptre de sortie 5, sont dirigés à la fois vers le haut et vers le bas, de part et d'autre d'une coupure horizontale, afin d'assurer une fonction de signalisation de jour du véhicule.Referring to the figure 9 the light beams 16 coming from the first two lateral LEDs 10, 11 and which are transmitted by the exit diopter 5, are directed both upwards and downwards, on either side of a horizontal cut, to provide a vehicle day signaling function.

Le faisceau lumineux global produit par un dispositif d'éclairage selon l'invention, pourrait être illustré par un diagramme final qui résulterait de la superposition des trois diagrammes des figures 7,8 et 9.The overall light beam produced by a lighting device according to the invention could be illustrated by a final diagram which would result from the superimposition of the three diagrams of the Figures 7,8 and 9 .

De cette manière, un dispositif d'éclairage selon l'invention, grâce à trois premières LED 9,10,11 capables d'envoyer de la lumière vers le premier dioptre d'entrée 2 et grâce à deux LED 12,13 capables d'envoyer de la lumière vers le deuxième dioptre d'entrée 3, peut assurer une fonction d'éclairage et une fonction de signalisation de jour du véhicule en utilisant une seule lentille optique 1.In this way, a lighting device according to the invention, by virtue of three first LEDs 9, 10, 11 capable of sending light towards the first input diopter 2 and thanks to two LEDs 12, 13 capable of send light to the second input diopter 3, can provide a lighting function and a vehicle day signaling function using a single optical lens 1.

En figure 10, un projecteur P selon l'invention est schématiquement illustré, avec un boîtier B fermé par une paroi G, laissant passer le faisceau émis par le dispositif 1 selon l'invention. Cette paroi G est notamment une glace transparente. Ce schéma est applicable de manière générale au projecteur selon l'invention.In figure 10 , a projector P according to the invention is schematically illustrated, with a housing B closed by a wall G, passing the beam emitted by the device 1 according to the invention. This wall G is in particular a transparent ice. This scheme is generally applicable to the projector according to the invention.

Claims (17)

  1. Optical lens (1) comprising a first flat input dioptre (2) and an output dioptre (5), characterised in that it comprises a second flat input dioptre (3) which is not coplanar with the first input dioptre (2), and is arranged in the said lens (1) such that all the rays emitted from a point of this second input dioptre (3) reach an intermediate dioptre (4) which reflects the lens (1), which dioptre is situated between the first input dioptre (2) and the output dioptre (5), and returns the said rays to the said output dioptre (5).
  2. Optical lens according to claim 1, characterised in that the first input dioptre (2) and the second input dioptre (3) are contained on planes which form between one another an angle of between 85° and 95°.
  3. Optical lens according to either of claims 1 or 2, characterised in that the output dioptre (5) is a surface with two focal points F1 and F2, the lens (1) having an optical axis which passes via these two focal points F1 and F2.
  4. Optical lens according to claim 3, characterised in that the second input dioptre (3) and the intermediate dioptre (4) are placed on both sides of the optical axis of the first input dioptre (2).
  5. Optical lens according to any one of claims 1 to 4, characterised in that the intermediate dioptre (4) and the output dioptre (5) are arranged between one another such as to create a focal point at the second input dioptre (3), so that all the rays which are emitted starting from this focal point and are reflected by the intermediate dioptre (4) towards the output dioptre (5) emerge from the lens (1) whilst being parallel to one another on a vertical plane parallel to, or comprising, the optical axis of the lens (1).
  6. Optical lens according to any one of claims 1 to 5, characterised in that the output dioptre (5) has an ellipsoid form.
  7. Optical lens according to any one of claims 1 to 6, characterised in that the intermediate dioptre (4) is reflective by means of depositing of a fine layer of aluminium.
  8. Lighting device for a vehicle comprising a lens according to any one of claims 1 to 7, characterised in that it comprises at least one first source of light (9, 10, 11) which can emit light towards the first input dioptre (2), and at least one second source of light (12, 13) which can emit light towards the second input dioptre (3), and in that the rays of light of the beams emitted by the said first (9, 10, 11) and second (12, 13) sources of light are transmitted by the output dioptre (5).
  9. Lighting device according to claim 8, characterised in that the rays of light transmitted by the output dioptre (5) form a part of a road lighting beam or a daytime signalling beam of the said vehicle, according to whether they are derived from the first input dioptre (2), the second input dioptre (3), or both these dioptres at the same time (2, 3).
  10. Lighting device according to claim 8 or 9, characterised in that each first source of light (9, 10, 11) and each second source of light (12, 13) are constituted by a light-emitting diode.
  11. Lighting device according to any one of claims 8 to 10, characterised in that at least one first source of light (9) participates in the formation of the daytime signalling beam of the vehicle, and in that at least one second source of light (12, 13) in combination with the intermediate dioptre (4) participates in the formation of a part of a road lighting beam.
  12. Lighting device according to claim 11, characterised in that the first dioptre (2) extends on a vertical and transverse plane, and the second dioptre (3) extends on a horizontal plane.
  13. Lighting device according to claim 12, characterised in that it comprises two first sources of light (10, 11) which are placed symmetrically relative to a longitudinal and vertical plane which intersects the first dioptre (2) in its middle, and in that the said first sources (10, 11) make it possible to ensure a daytime signalling function of the vehicle.
  14. Lighting device according to any one of claims 11 to 13, characterised in that it comprises a first source of light (9) which is placed on a longitudinal and vertical plane which intersects the first dioptre (2) in its middle, and in that the said first source (9) makes it possible to ensure a lighting function of the vehicle.
  15. Lighting device according to any one of claims 11 to 14, characterised in that it comprises two second sources of light (12, 13) which are placed symmetrically relative to a longitudinal and vertical plane which intersects the second dioptre (3) in its middle, and in that the beams derived from the said second sources of light (12, 13) are reflected by the intermediate dioptre (4) before being transmitted by the output dioptre (5) in order to generate a road lighting beam.
  16. Lighting device according to any one of claims 9 to 15, characterised in that the first input dioptre (2) is placed at the rear of the output dioptre (5), and in that the second input dioptre (3) and the reflective intermediate dioptre (4) are positioned between the said first input dioptre (2) and the said output dioptre (5), the said intermediate dioptre (4) being situated above the said second input dioptre (3).
  17. Front headlight of a vehicle, characterised in that it comprises a lighting device according to any one of claims 8 to 16.
EP14172985.5A 2013-06-20 2014-06-18 Lighting device of a vehicle using a multifunctional optical lens Active EP2816277B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1355832A FR3007501B1 (en) 2013-06-20 2013-06-20 DEVICE FOR LIGHTING A VEHICLE USING A MULTIFUNCTION OPTICAL LENS

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EP2816277A1 EP2816277A1 (en) 2014-12-24
EP2816277B1 true EP2816277B1 (en) 2015-11-04

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EP (1) EP2816277B1 (en)
FR (1) FR3007501B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018133250A1 (en) * 2017-01-19 2018-07-26 上海小糸车灯有限公司 Led light source high-beam and low-beam integrated automobile lamp module with adb function
EP3803198B1 (en) * 2018-06-01 2024-08-28 Valeo Vision Lighting module for automotive vehicle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3032517B1 (en) * 2015-02-05 2018-06-29 Valeo Vision VEHICLE LIGHT DEVICE
FR3108181B1 (en) 2020-03-12 2022-05-06 Vignal Systems Lens, work light incorporating such a lens, and vehicle
EP4650652A1 (en) * 2024-05-17 2025-11-19 T.Y.C. Brother Industrial Co., Ltd. Vehicle light device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT504668B1 (en) * 2007-01-11 2008-07-15 Zizala Lichtsysteme Gmbh TOTAL REFLECTION SYSTEM FOR A HEADLIGHT OR A LIGHT UNIT OF A MOTOR VEHICLE
FR2913095B1 (en) * 2007-02-28 2013-07-05 Valeo Vision PROJECTOR FOR MOTOR VEHICLE
FR2975462B1 (en) * 2011-05-17 2013-05-17 Valeo Vision OPTICAL UNIT, IN PARTICULAR FOR MOTOR VEHICLE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018133250A1 (en) * 2017-01-19 2018-07-26 上海小糸车灯有限公司 Led light source high-beam and low-beam integrated automobile lamp module with adb function
EP3803198B1 (en) * 2018-06-01 2024-08-28 Valeo Vision Lighting module for automotive vehicle

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FR3007501A1 (en) 2014-12-26
EP2816277A1 (en) 2014-12-24
FR3007501B1 (en) 2015-07-31

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