EP2799763B1 - Vehicle headlamp - Google Patents

Vehicle headlamp Download PDF

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Publication number
EP2799763B1
EP2799763B1 EP14165665.2A EP14165665A EP2799763B1 EP 2799763 B1 EP2799763 B1 EP 2799763B1 EP 14165665 A EP14165665 A EP 14165665A EP 2799763 B1 EP2799763 B1 EP 2799763B1
Authority
EP
European Patent Office
Prior art keywords
reflector
main
light source
diode
vehicle
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
EP14165665.2A
Other languages
German (de)
French (fr)
Other versions
EP2799763A1 (en
Inventor
Ziyed Thabet
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
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Publication of EP2799763A1 publication Critical patent/EP2799763A1/en
Application granted granted Critical
Publication of EP2799763B1 publication Critical patent/EP2799763B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout thereof

Definitions

  • the invention relates to a device for lighting and signaling a vehicle.
  • a vehicle and in particular a motor vehicle, is provided with a light source intended to illuminate a road in dark weather, in order to allow a driver to guide his vehicle safely, and a signaling light source of lower intensity, intended to inform other drivers of the presence of said vehicle in broad daylight.
  • the invention relates to an improved lighting and signaling device for a vehicle.
  • DRL from English Daytime Running Lamps
  • DRL is a device involving a white light placed in the front of the vehicle and which turns on automatically when the vehicle moves forward, in order to increase the visibility of the vehicle in daylight conditions.
  • This device is independent and comes in addition to the lighting device provided to illuminate the road. As a result, the coexistence of these two distinct devices leads to a significant bulk within the vehicle, and in particular at the level of the front headlights in which they are generally placed. Furthermore, since each of these two devices is based on a reflector which is specific to it, it is necessary to manufacture two separate reflectors, the overall machining time of which is long and therefore more expensive. Finally, the signaling lighting produced during the day is different from that which is generated at night to illuminate the road, so that the vehicle lighting does not constitute a distinctive and recognizable sign in all circumstances, allowing the model and / or brand of said vehicle to be identified.
  • a lighting and signaling device for a vehicle according to the preamble of claim 1 is for example known from document EP2075501 .
  • the subject of the invention is a lighting and signaling device for a vehicle, comprising at least one cavity delimited by a main reflector defining an optical axis, said cavity comprising at least one main light source capable of illuminating a road in combination. with said main reflector.
  • the main characteristic of a lighting and signaling device is that said at least one cavity contains a secondary light source and a secondary reflector, said secondary source being positioned in the cavity so that the reflector secondary recovers part of the luminous flux coming from said secondary source, said two sources and said two reflectors being arranged in the cavity to ensure both a lighting and signaling function of the vehicle.
  • the principle of the invention consists in adding to the main light source, a secondary light source associated with a secondary reflector, so that the two sources can provide a lighting function in dark weather or at night, and a function. daytime vehicle signaling.
  • the secondary light source emits a light beam of conical shape, ie a light cone, the secondary reflector collecting the majority of the light cone.
  • the main reflector is shaped to return the rays of the main light source below a mainly horizontal cut-off so as not to dazzle the motorists arriving in front.
  • the main reflector comprises a focus, the rays coming from this focus and directly reaching the main reflector, being reflected by the main reflector below a predominantly horizontal cutoff.
  • this main reflector also makes it possible to reflect the rays directly coming from the secondary source above said cut-off, and the rays coming from said secondary source and reflected a first time by the secondary reflector, in addition. below this cutoff.
  • the main reflector has a complex reflection surface, formed by an assembly of elementary sectors, each of said sectors being connected to the immediately neighboring sector by means of a generally vertical line.
  • Each sector is advantageously generated by a horizontal generator from which starts a set of vertical curves upwards and then downwards.
  • the horizontal generator is for example convex and its profile determines the horizontal distribution of the beam generated by the sector.
  • the generatrices of the sectors are chosen so that the rays coming from the source are reflected by the surface while being oriented downwards in order to form the cut, for example the cut of the code.
  • the vertical curves are for example the arcs of a parabola.
  • the focal points of each parabola upwards are generally distinct from the focal points of the parabolas leading downwards.
  • the main LED is placed on the optical axis of the main reflector in front of said reflector, to provide illumination of the road, in code mode or in high beam mode.
  • the secondary reflector serves as a mask making it possible to at least partially mask the two light sources from view.
  • the main reflector lines the rear base of said headlight and the secondary reflector is placed in front of the two light sources, avoiding to an individual placed in front of said vehicle and watching said projector to be dazzled by the two light sources.
  • the main and secondary light sources are fixed, and not adjustable on command.
  • the main light source and the secondary light source can each be unitary, or else be made up of a plurality of small-sized sources.
  • a source A unit light can for example be a light-emitting diode, also called an LED, with a single light emitting element.
  • a light source made up of a plurality of small-sized sources may for example be a light-emitting diode comprising several photoemitting elements.
  • the main reflector can be symmetrical or asymmetrical.
  • the headlight is designed to provide in combination with the primary light source a type lighting "Flat" (English term meaning flat), namely a beam illuminating in a substantially flat cut-off, e.g., a fog light beam or a beam which superimposed on a beam with oblique cut-off makes it possible to produce a passing beam.
  • a type lighting "Flat" English term meaning flat
  • a beam illuminating in a substantially flat cut-off e.g., a fog light beam or a beam which superimposed on a beam with oblique cut-off makes it possible to produce a passing beam.
  • the reflecting face of the main reflector and the reflecting face of the secondary reflector are oriented towards one another.
  • the main light source and the secondary light source are located between the main reflector and the secondary reflector. In this way, the light beams from the main light source and the light beams from the secondary light source can be reflected both on the main reflector and on the secondary reflector.
  • the secondary reflector is curved and delimits a space, the secondary light source being placed at said space and the main light source being placed between said secondary light source and the main reflector.
  • the secondary reflector is advantageously constituted by a curved wall which can be opened or closed, said wall defining an internal space. The secondary light source can thus be found inside said internal space, or outside this curved wall and in line with said space.
  • the sub-reflector is focused on the focus of the main reflector in two of these directions and shifted along the line. remaining direction.
  • this remaining direction is the vertical direction.
  • the primary reflector extends downward, below the light source, with the primary source positioned on top of the primary reflector and emitting downward, one or more of the sub-reflector's focus is vertically shifted and above. below the center of the main LED.
  • the main light source and the secondary light source are each represented by a light-emitting diode.
  • This type of light source is particularly efficient in terms of light intensity, while having a small footprint.
  • the secondary reflector is ellipsoidal and is able to return the beams coming from the secondary diode which impact it, systematically towards the main reflector.
  • the secondary reflector is a wall delimiting a quarter of an ellipsoid, said wall having a plane of symmetry.
  • the secondary diode and the main diode are aligned on the same plane.
  • This particular configuration is easy to achieve, and allows a control of the quality of the assembly of the two diodes thanks to a simple glance.
  • it facilitates the mounting of the LEDs on the same printed circuit board.
  • said alignment plane is horizontal.
  • the main diode is centered on the optical axis of the main reflector.
  • the secondary diode is placed at the level of the first focus of the secondary reflector.
  • the secondary diode is placed exactly at the first focus of the secondary reflector, and is therefore focused with respect to said reflector.
  • the secondary ellipsoidal reflector in an orthonormal frame defined by three orthogonal directions in space, the second focal point of the secondary reflector is focused on the main diode in two of these directions and offset in a remaining direction, perpendicular to the optical axis.
  • this remaining direction is the vertical direction.
  • the primary reflector extends downward, below the light source, with the primary source positioned on top of the primary reflector and emitting downward, one or more of the sub-reflector's focus is vertically shifted and above. below the center of the main LED.
  • the secondary reflector is parabolic and is able to return the beams coming from the secondary diode which impact it, systematically towards the main reflector.
  • the secondary reflector is a curved wall having a plane of symmetry.
  • the secondary diode and the main diode are inclined with respect to one another.
  • the main diode is located in a horizontal plane and the secondary diode is parallel to an inclined edge of said secondary reflector.
  • a second object of the invention is a vehicle headlight comprising a lighting and signaling device according to the invention.
  • the lighting and signaling device has the advantage of being simplified and not bulky, insofar as it is the same cavity of the headlight which provides the lighting and signaling functions of the vehicle without having underwent a fundamental structural change. It also has the advantage of constituting a specific signature of the vehicle, by being recognizable day and night and by making it possible to identify the model and / or the make of said vehicle. Finally, it has the advantage of not dazzling an individual who has to look at a projector according to the invention, this thanks to the incorporation of a small sub-reflector, initially used to perform the two previous functions.
  • the detailed description is given with respect to a frame of reference linked to a vehicle, 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.
  • a lighting and signaling device is generally mounted in a headlight of a motor vehicle.
  • a vehicle headlight comprises a cavity in which is disposed a first mode of preferred embodiment of a lighting and signaling device 1 according to the invention, said device 1 comprising a main light-emitting diode 2, a secondary light-emitting diode 3, a main reflector 4 and an ellipsoidal secondary reflector 5.
  • a light emitting diode will be referred to as LED ( standing for Light Emitting Diode ).
  • the rear face of the cavity is partially delimited by the main reflector 4, which is shaped to provide, in combination with the main LED 2, a lighting beam spread out in a transverse direction Y of the vehicle.
  • This main reflector 4 may be symmetrical to ensure uniform illumination in front of the vehicle, or be asymmetrical to favor a right or left direction of said illumination in front of said vehicle.
  • a main reflector 4 has a complex reflection surface, formed by an assembly of elementary sectors 6, each of said sectors 6 being connected to the immediately adjacent sector 6 by means of a generally vertical line 7.
  • Each sector 6 is advantageously generated by a horizontal generatrix from which starts a set of vertical curves upwards and then downwards.
  • the horizontal generator is for example convex and its profile determines the horizontal distribution of the beam generated by the sector 6.
  • the generatrices of the sectors 6 are chosen so that the rays coming from the source are reflected by the surface while being oriented downwards in order to form the cut, for example the cut of the code.
  • the vertical curves are for example the arcs of a parabola.
  • the focal points of each parabola upwards are generally distinct from the focal points of the parabolas leading downwards.
  • the main LED 2 is placed on the optical axis of the main reflector 4 in front of said reflector 4, to provide illumination of the road, in code mode or in high beam mode.
  • the secondary reflector 5 is materialized by an ellipsoidal wall representing a quarter of an ellipsoid, said wall comprising a curved and reflecting internal surface.
  • This reflective internal surface has a vertical plane of symmetry extending along a longitudinal axis X of the vehicle.
  • This sub-reflector 5 is placed in front of the main reflector 4 so that its reflecting surface faces the reflecting face of the main reflector 4.
  • the sub-reflector 5 is located in front of the highest part of the main reflector 4, without ever emerging vertically from said main reflector 4.
  • the secondary LED 3 is placed inside the secondary reflector 5, at its uppermost zone, and more precisely at the exact location of the first focus of the ellipsoid partially delimited by said secondary reflector 5.
  • the secondary LED 3 consists of a rectangular parallelepipedic body 8 and of a photoemitter element 9 coated with a protective dome emerging from the center of one face of said body 8, said source emitting a diverging light cone, of which the angular opening ⁇ is, in this example, substantially equal to 140 °.
  • This secondary LED 3 is oriented in the secondary reflector 5 so that a fraction of the light beams that it emits in the angle cone ⁇ , is intercepted by said secondary reflector 5.
  • this fraction is materialized by a fraction of a cone, the angular opening ⁇ of which is inscribed in the cone of angle ⁇ , this angular opening ⁇ being in this example close to 100 °.
  • the secondary reflector 5 thus collects the majority of the light cone emitted by the secondary LED 3.
  • the main LED 2 consists of a rectangular parallelepipedic body 10, the light emitting element 11 of said main LED 2 emerging at the center of one face of said body 10. Like secondary LED 3, this main LED 2 is oriented in the cavity of the projector so that the light beams which it emits scan the entire space located under the body 10 of said main LED 2, over an angular sector of 180 °.
  • the main LED 2 and the secondary LED 3 are aligned in a horizontal plane.
  • the two photoemitter elements 9,11 of said LEDs 2,3 are aligned along a horizontal axis.
  • the main LED 2 is located between the main reflector 4, and the assembly consisting of the secondary reflector 5 and the secondary LED 3. More precisely, the light emitting element 11 of the main diode 2 is placed at the level of the second focus 12 of the ellipsoidal secondary reflector 5, in a longitudinal direction X of the vehicle, but is offset vertically with respect to said second focal point 12. In fact, the light emitting element 11 is placed above this fictitious second focal point 12, the corresponding offset in height at the height of a DRL beam. If the main reflector 4 is symmetrical, the light emitting element 11 of the main LED 2 and the second focus 12 are aligned along a vertical axis Z. If the main reflector 5 is asymmetrical, the light emitting element 11 and said second focus 12 are offset along a transverse axis Y of the vehicle.
  • the beams 13 coming from the main LED 2 and which are intercepted by the main reflector 4 are returned to the bottom of the cut-off to provide the vehicle lighting function.
  • a tiny part of the beams coming from said main LED 2 is intercepted by the secondary reflector 5, to then be reflected upwards, without fulfilling a specific function within the vehicle.
  • the secondary reflector 5 in no way disturbs the lighting function produced by the main LED 2 in combination with the main reflector 4.
  • the beams 14 coming from the secondary LED 3 and which directly impact the main reflector 4 are returned by the latter to the top of the vehicle, to provide the component of the DRL function above the cut-off.
  • the beams 15 coming from said secondary LED 3 and which are reflected a first time by the secondary reflector 5 and then a second time by the main reflector 4, are returned to the bottom of the vehicle, to ensure component of the DRL function below the cut.
  • a device grouping the main LED 2, the secondary LED 3, the main reflector 4 and the secondary reflector 5 as they are arranged in the first preferred embodiment described above, makes it possible to providing a vehicle lighting and signaling function with a common signature for said functions.
  • the secondary reflector 5 constituting the most forward part of the device 1 also makes it possible to play the role of a cover whose function is to at least partially obscure the two LEDs 2, 3 and to prevent an individual looking inside of the projector to be dazzled.
  • a second preferred embodiment of a device 100 according to the invention differs from the first embodiment described above, in that the secondary reflector 105 has a parabolic shape and no longer an ellipsoidal shape.
  • the main LED 102 and the main reflector 104 remain unchanged from the first embodiment, either in their intrinsic characteristics or in their relative arrangement.
  • the secondary reflector 105 is materialized by a curved parabolic wall 108, comprising a reflective internal surface.
  • This curved wall 108 has a maximum height at the level of its central part 121, and a minimum height at the level of each of its two ends 122 located on either side of said central zone 121, said height gradually reducing between said part central 121 and said ends 122.
  • the reflective internal surface has a vertical plane of symmetry extending along a longitudinal axis X of the vehicle.
  • This secondary reflector 105 is placed in front of the main reflector 104 so that its reflecting surface is oriented towards the reflecting face of said main reflector 104.
  • the secondary LED 103 is placed inside the secondary reflector 105, at its edge 120 le. higher, while being parallel to said edge 120. In this way, the secondary LED 103 is found inclined relative to the main LED 102 which is horizontal.
  • the light beams from the main LED 102 and from the secondary LED 103 have trajectories similar to those of the light beams described in figure 5 relating to the first embodiment, to make it possible to provide a vehicle lighting function and a daytime signaling function of said vehicle having the same signature.
  • the secondary reflector 105 also plays the role of an anti-glare mask.
  • the secondary reflector It is also possible to envisage other shapes and geometries for the secondary reflector, the main thing being that it has a certain symmetry in order to correctly place the secondary LED which will be associated with it.

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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 et de signalisation d'un véhicule. Généralement un véhicule, et notamment un véhicule automobile, est doté d'une source d'éclairage destinée à illuminer par temps sombre une route, afin de permettre à un conducteur de guider son véhicule avec sécurité, et une source lumineuse de signalisation de plus faible intensité, prévue pour informer les autres conducteurs de la présence dudit véhicule en plein jour. Plus spécifiquement, l'invention porte sur un dispositif d'éclairage et de signalisation amélioré d'un véhicule.The invention relates to a device for lighting and signaling a vehicle. Generally, a vehicle, and in particular a motor vehicle, is provided with a light source intended to illuminate a road in dark weather, in order to allow a driver to guide his vehicle safely, and a signaling light source of lower intensity, intended to inform other drivers of the presence of said vehicle in broad daylight. More specifically, the invention relates to an improved lighting and signaling device for a vehicle.

Habituellement la fonction de signalisation du véhicule est réalisée au moyen de feux de circulation diurne ou DRL (de l'anglais Daytime Running Lamps), qui est un dispositif impliquant une lumière blanche placée à l'avant du véhicule et qui s'allume automatiquement lorsque le véhicule se déplace vers l'avant, afin d'accroître la visibilité du véhicule dans des conditions de lumière de jour.Usually the signaling function of the vehicle is carried out by means of daytime running lights or DRL (from English Daytime Running Lamps ), which is a device involving a white light placed in the front of the vehicle and which turns on automatically when the vehicle moves forward, in order to increase the visibility of the vehicle in daylight conditions.

Un tel dispositif de signalisation est actuellement réalisé sous différentes formes :

  • soit une pluralité de diodes électroluminescentes ou LED (de l'anglais Light Emitting Diode) disposées selon une géométrie particulière,
  • soit un guide de lumière,
  • soit des miroirs et/ou des lentilles.
Such a signaling device is currently produced in different forms:
  • either a plurality of electroluminescent diodes or LEDs ( standing for Light Emitting Diode ) arranged according to a particular geometry,
  • either a light guide,
  • either mirrors and / or lenses.

Ce dispositif est indépendant et vient s'ajouter au dispositif d'éclairage prévu pour éclairer la route. Il en résulte que la coexistence de ces deux dispositifs distincts entraine un encombrement important au sein du véhicule, et en particulier au niveau des projecteurs avant dans lesquels ils sont généralement placés. De plus, puisque chacun de ces deux dispositifs se fonde sur un réflecteur qui lui est spécifique, il est nécessaire de fabriquer deux réflecteurs distincts, dont le temps d'usinage global est long et donc plus coûteux. Enfin, l'éclairage de signalisation produit le jour est différent de celui qui est généré la nuit pour éclairer la route, si bien que l'éclairage du véhicule ne constitue pas un signe distinctif et reconnaissable en toutes circonstances, permettant d'identifier le modèle et/ou la marque dudit véhicule. Un dispositif d'éclairage et de signalisation d'un véhicule selon le préambule de la revendication 1 est par exemple connu du document EP2075501 .This device is independent and comes in addition to the lighting device provided to illuminate the road. As a result, the coexistence of these two distinct devices leads to a significant bulk within the vehicle, and in particular at the level of the front headlights in which they are generally placed. Furthermore, since each of these two devices is based on a reflector which is specific to it, it is necessary to manufacture two separate reflectors, the overall machining time of which is long and therefore more expensive. Finally, the signaling lighting produced during the day is different from that which is generated at night to illuminate the road, so that the vehicle lighting does not constitute a distinctive and recognizable sign in all circumstances, allowing the model and / or brand of said vehicle to be identified. A lighting and signaling device for a vehicle according to the preamble of claim 1 is for example known from document EP2075501 .

Les dispositifs d'éclairage et de signalisation d'un véhicule selon l'invention qui comprennent les caractéristiques de la revendication 1, permettent de remédier aux inconvénients relevés dans l'état de la technique.The lighting and signaling devices of a vehicle according to the invention which comprise the characteristics of claim 1, make it possible to remedy the drawbacks noted in the state of the art.

L'invention a pour objet un dispositif d'éclairage et de signalisation d'un véhicule, comprenant au moins une cavité délimitée par un réflecteur principal définissant un axe optique, ladite cavité comportant au moins une source lumineuse principale apte à éclairer une route en combinaison avec ledit réflecteur principal.The subject of the invention is a lighting and signaling device for a vehicle, comprising at least one cavity delimited by a main reflector defining an optical axis, said cavity comprising at least one main light source capable of illuminating a road in combination. with said main reflector.

La principale caractéristique d'un dispositif d'éclairage et de signalisation selon l'invention, est que ladite au moins une cavité contient une source lumineuse secondaire et un réflecteur secondaire, ladite source secondaire étant positionnée dans la cavité de manière à ce que le réflecteur secondaire récupère un partie du flux lumineux en provenance de ladite source secondaire, lesdites deux sources et lesdits deux réflecteurs étant agencés dans la cavité pour assurer à la fois une fonction d'éclairage et de signalisation du véhicule. Le principe de l'invention consiste à adjoindre à la source lumineuse principale, une source lumineuse secondaire associée à un réflecteur secondaire, de manière à ce que les deux sources puissent assurer une fonction d'éclairage par temps sombre ou de nuit, et une fonction de signalisation de jour du véhicule. Selon une réalisation de l'invention, la source lumineuse secondaire émet un faisceau lumineux de forme conique, soit un cône lumineux, le réflecteur secondaire collectant la majorité du cône lumineux.The main characteristic of a lighting and signaling device according to the invention is that said at least one cavity contains a secondary light source and a secondary reflector, said secondary source being positioned in the cavity so that the reflector secondary recovers part of the luminous flux coming from said secondary source, said two sources and said two reflectors being arranged in the cavity to ensure both a lighting and signaling function of the vehicle. The principle of the invention consists in adding to the main light source, a secondary light source associated with a secondary reflector, so that the two sources can provide a lighting function in dark weather or at night, and a function. daytime vehicle signaling. According to one embodiment of the invention, the secondary light source emits a light beam of conical shape, ie a light cone, the secondary reflector collecting the majority of the light cone.

Selon une réalisation de l'invention, pour éclairer la route, le réflecteur principal est conformé pour renvoyer les rayons de la source lumineuse principale en dessous d'une coupure majoritairement horizontale afin de ne pas éblouir les automobilistes qui arrivent en face. Selon une réalisation de l'invention le réflecteur principal comprend un foyer, les rayons provenant de ce foyer et atteignant directement le réflecteur principal, étant réfléchis par le réflecteur principal en dessous d'une coupure majoritairement horizontale. Selon une réalisation de l'invention, ce réflecteur principal permet également de réfléchir les rayons directement issus de la source secondaire au-dessus de ladite coupure, et les rayons issus de ladite source secondaire et réfléchis une première fois par le réflecteur secondaire, au-dessous de cette coupure.According to one embodiment of the invention, to illuminate the road, the main reflector is shaped to return the rays of the main light source below a mainly horizontal cut-off so as not to dazzle the motorists arriving in front. According to one embodiment of the invention, the main reflector comprises a focus, the rays coming from this focus and directly reaching the main reflector, being reflected by the main reflector below a predominantly horizontal cutoff. According to one embodiment of the invention, this main reflector also makes it possible to reflect the rays directly coming from the secondary source above said cut-off, and the rays coming from said secondary source and reflected a first time by the secondary reflector, in addition. below this cutoff.

Selon une réalisation de l'invention, le réflecteur principal possède une surface de réflexion complexe, formée par un assemblage de secteurs élémentaires, chacun desdits secteurs se raccordant au secteur immédiatement voisin au moyen d'une ligne globalement verticale. Chaque secteur est avantageusement généré par une génératrice horizontale d'où part un ensemble de courbes verticales vers le haut puis vers le bas. La génératrice horizontale est par exemple convexe et son profil détermine la répartition horizontale du faisceau généré par le secteur. Les génératrices des secteurs sont choisies pour que les rayons issus de la source soient réfléchis par la surface en étant orienté vers le bas afin de former la coupure, par exemple la coupure du code. Les courbes verticales sont par exemple des arcs de parabole. Les foyers de chaque parabole vers le haut sont en général distincts des foyers des paraboles partant vers le bas. La LED principale est placée sur l'axe optique du réflecteur principal devant ledit réflecteur, pour assurer un éclairage de la route, en mode code ou en mode feu de route.According to one embodiment of the invention, the main reflector has a complex reflection surface, formed by an assembly of elementary sectors, each of said sectors being connected to the immediately neighboring sector by means of a generally vertical line. Each sector is advantageously generated by a horizontal generator from which starts a set of vertical curves upwards and then downwards. The horizontal generator is for example convex and its profile determines the horizontal distribution of the beam generated by the sector. The generatrices of the sectors are chosen so that the rays coming from the source are reflected by the surface while being oriented downwards in order to form the cut, for example the cut of the code. The vertical curves are for example the arcs of a parabola. The focal points of each parabola upwards are generally distinct from the focal points of the parabolas leading downwards. The main LED is placed on the optical axis of the main reflector in front of said reflector, to provide illumination of the road, in code mode or in high beam mode.

Selon une réalisation de l'invention, le réflecteur secondaire sert de cache permettant de masquer à la vue au moins partiellement les deux sources lumineuses. En effet, lorsque le dispositif selon l'invention est placé dans un véhicule, et plus spécifiquement dans un projecteur avant, le réflecteur principal tapisse le fond arrière dudit projecteur et le réflecteur secondaire est placé à l'avant des deux sources lumineuses, évitant à un individu placé à l'avant dudit véhicule et regardant ledit projecteur d'être ébloui par les deux sources lumineuses.According to one embodiment of the invention, the secondary reflector serves as a mask making it possible to at least partially mask the two light sources from view. In fact, when the device according to the invention is placed in a vehicle, and more specifically in a front headlight, the main reflector lines the rear base of said headlight and the secondary reflector is placed in front of the two light sources, avoiding to an individual placed in front of said vehicle and watching said projector to be dazzled by the two light sources.

Avantageusement, les sources lumineuses principale et secondaire sont fixes, et non orientables sur commande. La source lumineuse principale et la source lumineuse secondaire peuvent être chacune unitaires, ou bien être constituées d'une pluralité de sources de petites dimensions. Une source lumineuse unitaire peut par exemple être une diode électroluminescente, encore appelée LED, avec un seul élément photoémetteur. Une source lumineuse constituée d'une pluralité de sources de petites dimensions peut par exemple être une diode électroluminescente comprenant plusieurs éléments photoémetteurs.Advantageously, the main and secondary light sources are fixed, and not adjustable on command. The main light source and the secondary light source can each be unitary, or else be made up of a plurality of small-sized sources. A source A unit light can for example be a light-emitting diode, also called an LED, with a single light emitting element. A light source made up of a plurality of small-sized sources may for example be a light-emitting diode comprising several photoemitting elements.

Le réflecteur principal peut être symétrique ou asymétrique. Préférentiellement, le projecteur principal est conformé pour assurer en combinaison avec la source lumineuse principale un éclairage de type «Flat» (terme anglais signifiant plat), à savoir un faisceau éclairant sous une coupure essentiellement plate, par exemple un faisceau antibrouillard ou encore un faisceau qui superposé à un faisceau à coupure oblique permet de réaliser un faisceau de croisement.The main reflector can be symmetrical or asymmetrical. Preferably, the headlight is designed to provide in combination with the primary light source a type lighting "Flat" (English term meaning flat), namely a beam illuminating in a substantially flat cut-off, e.g., a fog light beam or a beam which superimposed on a beam with oblique cut-off makes it possible to produce a passing beam.

Avantageusement, la face réfléchissante du réflecteur principal et la face réfléchissante du réflecteur secondaire sont orientées l'une vers l'autre.Advantageously, the reflecting face of the main reflector and the reflecting face of the secondary reflector are oriented towards one another.

De façon préférentielle, la source lumineuse principale et la source lumineuse secondaire sont situées entre le réflecteur principal et le réflecteur secondaire. De cette manière, les faisceaux lumineux issus de la source lumineuse principale et les faisceaux lumineux issus de la source lumineuse secondaire pourront se réfléchir à la fois sur le réflecteur principal et sur le réflecteur secondaire.Preferably, the main light source and the secondary light source are located between the main reflector and the secondary reflector. In this way, the light beams from the main light source and the light beams from the secondary light source can be reflected both on the main reflector and on the secondary reflector.

Préférentiellement, le réflecteur secondaire est incurvé et délimite un espace, la source lumineuse secondaire étant placée au niveau dudit espace et la source lumineuse principale étant placée entre ladite source lumineuse secondaire et le réflecteur principal. En effet, le réflecteur secondaire est avantageusement constitué par une paroi incurvée pouvant être ouverte ou fermée, ladite paroi délimitant un espace interne. La source lumineuse secondaire peut ainsi se retrouver à l'intérieur dudit espace interne, ou à l'extérieur de cette paroi incurvée et au droit dudit espace.Preferably, the secondary reflector is curved and delimits a space, the secondary light source being placed at said space and the main light source being placed between said secondary light source and the main reflector. Indeed, the secondary reflector is advantageously constituted by a curved wall which can be opened or closed, said wall defining an internal space. The secondary light source can thus be found inside said internal space, or outside this curved wall and in line with said space.

De façon avantageuse, dans un repère orthonormé défini par trois directions orthogonales dans l'espace, le réflecteur secondaire est focalisé sur le foyer du réflecteur principal selon deux de ces directions et décalé selon la direction restante. Préférentiellement cette direction restante est la direction verticale. Par exemple, lorsque le réflecteur principal s'étend vers la bas, en dessous de la source lumineuse, la source principale étant positionnée en haut du réflecteur principal et émettant vers le bas, un ou le foyer du réflecteur secondaire est verticalement décalé et au-dessous du centre de la LED principale. En revanche, il n'y a pas de décalage transversal ou longitudinal.Advantageously, in an orthonormal frame defined by three orthogonal directions in space, the sub-reflector is focused on the focus of the main reflector in two of these directions and shifted along the line. remaining direction. Preferably, this remaining direction is the vertical direction. For example, when the primary reflector extends downward, below the light source, with the primary source positioned on top of the primary reflector and emitting downward, one or more of the sub-reflector's focus is vertically shifted and above. below the center of the main LED. On the other hand, there is no transverse or longitudinal offset.

Avantageusement, la source lumineuse principale et la source lumineuse secondaire sont représentées chacune par une diode électroluminescente. Ce type de source lumineuse est particulièrement performant en matière d'intensité lumineuse, tout en ayant un encombrement restreint.Advantageously, the main light source and the secondary light source are each represented by a light-emitting diode. This type of light source is particularly efficient in terms of light intensity, while having a small footprint.

Selon un premier mode de réalisation préféré d'un dispositif selon l'invention, le réflecteur secondaire est ellipsoïdal et est apte à renvoyer les faisceaux issus de la diode secondaire qui l'impactent, systématiquement vers le réflecteur principal. Préférentiellement, le réflecteur secondaire est une paroi délimitant un quart d'ellipsoïde, ladite paroi présentant un plan de symétrie.According to a first preferred embodiment of a device according to the invention, the secondary reflector is ellipsoidal and is able to return the beams coming from the secondary diode which impact it, systematically towards the main reflector. Preferably, the secondary reflector is a wall delimiting a quarter of an ellipsoid, said wall having a plane of symmetry.

Selon une réalisation de l'invention, la diode secondaire et la diode principale sont alignées sur un même plan. Cette configuration particulière est facile à réaliser, et permet un contrôle de la qualité du montage des deux diodes grâce à un simple coup d'œil. De plus, cela facilite le montage des LEDs sur une même carte de circuit imprimé. Lorsque le dispositif selon l'invention est placé dans un projecteur avant de véhicule, ledit plan d'alignement est horizontal.According to one embodiment of the invention, the secondary diode and the main diode are aligned on the same plane. This particular configuration is easy to achieve, and allows a control of the quality of the assembly of the two diodes thanks to a simple glance. In addition, it facilitates the mounting of the LEDs on the same printed circuit board. When the device according to the invention is placed in a vehicle headlight, said alignment plane is horizontal.

De façon préférentielle, la diode principale est centrée sur l'axe optique du réflecteur principal.Preferably, the main diode is centered on the optical axis of the main reflector.

Préférentiellement, la diode secondaire est placée au niveau du premier foyer du réflecteur secondaire. De façon préférentielle, la diode secondaire est placée exactement au premier foyer du réflecteur secondaire, et est donc focalisée par rapport audit réflecteur.Preferably, the secondary diode is placed at the level of the first focus of the secondary reflector. Preferably, the secondary diode is placed exactly at the first focus of the secondary reflector, and is therefore focused with respect to said reflector.

De façon avantageuse, le réflecteur ellipsoïdal secondaire dans un repère orthonormé défini par trois directions orthogonales dans l'espace, le deuxième foyer du réflecteur secondaire est focalisé sur la diode principale selon deux de ces directions et décalé selon une direction restante, perpendiculaire à l'axe optique. Préférentiellement cette direction restante est la direction verticale. Par exemple, lorsque le réflecteur principal s'étend vers la bas, en dessous de la source lumineuse, la source principale étant positionnée en haut du réflecteur principal et émettant vers le bas, un ou le foyer du réflecteur secondaire est verticalement décalé et au-dessous du centre de la LED principale. En revanche, il n'y a pas de décalage transversal ou longitudinal.Advantageously, the secondary ellipsoidal reflector in an orthonormal frame defined by three orthogonal directions in space, the second focal point of the secondary reflector is focused on the main diode in two of these directions and offset in a remaining direction, perpendicular to the optical axis. Preferably, this remaining direction is the vertical direction. For example, when the primary reflector extends downward, below the light source, with the primary source positioned on top of the primary reflector and emitting downward, one or more of the sub-reflector's focus is vertically shifted and above. below the center of the main LED. On the other hand, there is no transverse or longitudinal offset.

Selon un deuxième mode de réalisation préféré d'un dispositif selon l'invention, le réflecteur secondaire est parabolique et est apte à renvoyer les faisceaux issus de la diode secondaire qui l'impactent, systématiquement vers le réflecteur principal. Préférentiellement, le réflecteur secondaire est une paroi incurvée présentant un plan de symétrie.According to a second preferred embodiment of a device according to the invention, the secondary reflector is parabolic and is able to return the beams coming from the secondary diode which impact it, systematically towards the main reflector. Preferably, the secondary reflector is a curved wall having a plane of symmetry.

Avantageusement, la diode secondaire et la diode principale sont inclinées l'une par rapport à l'autre. Lorsque le dispositif selon l'invention se retrouve dans un projecteur de véhicule, la diode principale est située dans un plan horizontal et la diode secondaire est parallèle à un bord incliné dudit réflecteur secondaire.Advantageously, the secondary diode and the main diode are inclined with respect to one another. When the device according to the invention is found in a vehicle headlight, the main diode is located in a horizontal plane and the secondary diode is parallel to an inclined edge of said secondary reflector.

L'invention a pour deuxième objet un projecteur de véhicule comprenant un dispositif d'éclairage et de signalisation selon l'invention.A second object of the invention is a vehicle headlight comprising a lighting and signaling device according to the invention.

Le dispositif d'éclairage et de signalisation selon l'invention présente l'avantage d'être simplifié et peu encombrant, dans la mesure où c'est la même cavité du projecteur qui assure les fonctions d'éclairage et de signalisation du véhicule sans avoir subi une modification structurelle de fond. Il a de plus l'avantage de constituer une signature spécifique du véhicule, en étant reconnaissable de jour comme de nuit et en permettant d'identifier le modèle et/ou la marque dudit véhicule. Il présente enfin l'avantage de ne pas éblouir un individu amené à regarder un projecteur selon l'invention, ceci grâce à l'incorporation d'un réflecteur secondaire de petite dimension, utilisé initialement pour assurer les deux fonctions précédentes.The lighting and signaling device according to the invention has the advantage of being simplified and not bulky, insofar as it is the same cavity of the headlight which provides the lighting and signaling functions of the vehicle without having underwent a fundamental structural change. It also has the advantage of constituting a specific signature of the vehicle, by being recognizable day and night and by making it possible to identify the model and / or the make of said vehicle. Finally, it has the advantage of not dazzling an individual who has to look at a projector according to the invention, this thanks to the incorporation of a small sub-reflector, initially used to perform the two previous functions.

On donne, ci-après, une description détaillée de deux modes de réalisation préférés d'un dispositif d'éclairage et de signalisation selon l'invention, en se référant aux figures 1 à 8.

  • La figure 1 est une vue en perspective d'un premier mode de réalisation préféré d'un dispositif d'éclairage et de signalisation selon l'invention,
  • La figure 2 est une vue agrandie en perspective de dessus du dispositif de la figure 1,
  • La figure 3 est une vue schématique de coté d'une diode principale, d'une diode secondaire et d'un réflecteur du dispositif de la figure 1,
  • La figure 4 est une vue en perspective de dessous des trois principaux éléments illustrés à la figure 3,
  • La figure 5 est une vue schématique de coté du dispositif de la figure 1, montrant les trajectoires des différents faisceaux lumineux issus de la diode principale et de la diode secondaire.
  • La figure 6 est une vue en perspective d'un deuxième mode de réalisation préféré d'un dispositif d'éclairage et de signalisation selon l'invention,
  • La figure 7 est une vue de coté du dispositif de la figure 6.
A detailed description is given below of two preferred embodiments of a lighting and signaling device according to the invention, with reference to figures 1 to 8 .
  • The figure 1 is a perspective view of a first preferred embodiment of a lighting and signaling device according to the invention,
  • The figure 2 is an enlarged perspective view from above of the device of the figure 1 ,
  • The figure 3 is a schematic side view of a main diode, a secondary diode and a reflector of the device of the figure 1 ,
  • The figure 4 is a perspective view from below of the three main elements shown on figure 3 ,
  • The figure 5 is a schematic side view of the device of the figure 1 , showing the trajectories of the different light beams coming from the main diode and the secondary diode.
  • The figure 6 is a perspective view of a second preferred embodiment of a lighting and signaling device according to the invention,
  • The figure 7 is a side view of the device of the figure 6 .

Afin de faciliter la compréhension de l'invention, la description détaillée est effectuée par rapport à un référentiel lié à un véhicule, 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.In order to facilitate understanding of the invention, the detailed description is given with respect to a frame of reference linked to a vehicle, 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.

Un dispositif d'éclairage et de signalisation selon l'invention est généralement monté dans un projecteur avant d'un véhicule automobile.A lighting and signaling device according to the invention is generally mounted in a headlight of a motor vehicle.

En se référant aux figures 1, 2, 3, et 4, un projecteur de véhicule selon l'invention, comporte une cavité dans laquelle est disposé un premier mode de réalisation préféré d'un dispositif 1 d'éclairage et de signalisation selon l'invention, ledit dispositif 1 comprenant une diode électroluminescente principale 2, une diode électroluminescente secondaire 3, un réflecteur principal 4 et un réflecteur secondaire ellipsoïdal 5. Afin de simplifier la description, une diode électroluminescente sera désignée sous l'appellation de LED (de l'anglais Light Emitting Diode). La face arrière de la cavité est délimitée partiellement par le réflecteur 4 principal, qui est conformé pour assurer, en combinaison avec la LED principale 2, un faisceau d'éclairage étalé selon une direction transversale Y du véhicule. Ce réflecteur principal 4 peut être symétrique pour assurer un éclairage homogène devant le véhicule, ou être asymétrique pour privilégier une direction droite ou gauche dudit éclairage devant ledit véhicule. Généralement, un tel réflecteur principal 4 possède une surface de réflexion complexe, formée par un assemblage de secteurs élémentaires 6, chacun desdits secteurs 6 se raccordant au secteur 6 immédiatement voisin au moyen d'une ligne 7 globalement verticale. Chaque secteur 6 est avantageusement généré par une génératrice horizontale d'où part un ensemble de courbes verticales vers le haut puis vers le bas. La génératrice horizontale est par exemple convexe et son profil détermine la répartition horizontale du faisceau généré par le secteur 6. Les génératrices des secteurs 6 sont choisies pour que les rayons issus de la source soient réfléchis par la surface en étant orienté vers le bas afin de former la coupure, par exemple la coupure du code. Les courbes verticales sont par exemple des arcs de parabole. Les foyers de chaque parabole vers le haut sont en général distincts des foyers des paraboles partant vers le bas. La LED principale 2 est placée sur l'axe optique du réflecteur principal 4 devant ledit réflecteur 4, pour assurer un éclairage de la route, en mode code ou en mode feu de route.With reference to figures 1, 2, 3, and 4 , a vehicle headlight according to the invention, comprises a cavity in which is disposed a first mode of preferred embodiment of a lighting and signaling device 1 according to the invention, said device 1 comprising a main light-emitting diode 2, a secondary light-emitting diode 3, a main reflector 4 and an ellipsoidal secondary reflector 5. In order to simplify the description , a light emitting diode will be referred to as LED ( standing for Light Emitting Diode ). The rear face of the cavity is partially delimited by the main reflector 4, which is shaped to provide, in combination with the main LED 2, a lighting beam spread out in a transverse direction Y of the vehicle. This main reflector 4 may be symmetrical to ensure uniform illumination in front of the vehicle, or be asymmetrical to favor a right or left direction of said illumination in front of said vehicle. Generally, such a main reflector 4 has a complex reflection surface, formed by an assembly of elementary sectors 6, each of said sectors 6 being connected to the immediately adjacent sector 6 by means of a generally vertical line 7. Each sector 6 is advantageously generated by a horizontal generatrix from which starts a set of vertical curves upwards and then downwards. The horizontal generator is for example convex and its profile determines the horizontal distribution of the beam generated by the sector 6. The generatrices of the sectors 6 are chosen so that the rays coming from the source are reflected by the surface while being oriented downwards in order to form the cut, for example the cut of the code. The vertical curves are for example the arcs of a parabola. The focal points of each parabola upwards are generally distinct from the focal points of the parabolas leading downwards. The main LED 2 is placed on the optical axis of the main reflector 4 in front of said reflector 4, to provide illumination of the road, in code mode or in high beam mode.

En se référant aux figures 2 et 4, le réflecteur secondaire 5 est matérialisée par une paroi ellipsoïdale représentant le quart d'une ellipsoïde, ladite paroi comportant une surface interne incurvée et réfléchissante. Cette surface interne réfléchissante possède un plan de symétrie vertical s'étendant selon un axe longitudinal X du véhicule. Ce réflecteur secondaire 5 est placé devant le réflecteur principal 4 de sorte que sa surface réfléchissante soit orientée vers la face réfléchissante du réflecteur principal 4.With reference to figures 2 and 4 , the secondary reflector 5 is materialized by an ellipsoidal wall representing a quarter of an ellipsoid, said wall comprising a curved and reflecting internal surface. This reflective internal surface has a vertical plane of symmetry extending along a longitudinal axis X of the vehicle. This sub-reflector 5 is placed in front of the main reflector 4 so that its reflecting surface faces the reflecting face of the main reflector 4.

Comme l'illustrent les figures 1 et 5, le réflecteur secondaire 5 est situé en face de la partie la plus haute du réflecteur principal 4, sans jamais émerger verticalement dudit réflecteur principal 4.As illustrated by figures 1 and 5 , the sub-reflector 5 is located in front of the highest part of the main reflector 4, without ever emerging vertically from said main reflector 4.

En se référant aux figures 2, 3 et 4, la LED secondaire 3 est placée à l'intérieur du réflecteur secondaire 5, au niveau de sa zone la plus haute, et plus précisément à l'emplacement exact du premier foyer de l'ellipsoïde délimitée partiellement par ledit réflecteur secondaire 5.With reference to figures 2, 3 and 4 , the secondary LED 3 is placed inside the secondary reflector 5, at its uppermost zone, and more precisely at the exact location of the first focus of the ellipsoid partially delimited by said secondary reflector 5.

En se référant à la figure 3, la LED secondaire 3 se compose d'un corps parallélépipédique 8 rectangle et d'un élément photoémetteur 9 revêtu d'un dôme de protection émergeant au centre d'une face dudit corps 8, ladite source émettant un cône lumineux divergent, dont l'ouverture angulaire β est, dans cet exemple, sensiblement égale à 140°. Cette LED secondaire 3 est orientée dans le réflecteur secondaire 5 de façon à ce qu'une fraction des faisceaux lumineux qu'elle émet dans le cône d'angle β, soit interceptée par ledit réflecteur secondaire 5. Préférentiellement, cette fraction est matérialisée par une fraction de cône, dont l'ouverture angulaire α est inscrite dans le cône d'angle β, cette ouverture angulaire α étant voisine dans cet exemple de 100°. Le réflecteur secondaire 5 collecte ainsi la majorité du cône lumineux émis par la LED secondaire 3.With reference to the figure 3 , the secondary LED 3 consists of a rectangular parallelepipedic body 8 and of a photoemitter element 9 coated with a protective dome emerging from the center of one face of said body 8, said source emitting a diverging light cone, of which the angular opening β is, in this example, substantially equal to 140 °. This secondary LED 3 is oriented in the secondary reflector 5 so that a fraction of the light beams that it emits in the angle cone β, is intercepted by said secondary reflector 5. Preferably, this fraction is materialized by a fraction of a cone, the angular opening α of which is inscribed in the cone of angle β, this angular opening α being in this example close to 100 °. The secondary reflector 5 thus collects the majority of the light cone emitted by the secondary LED 3.

En se référant aux figures 2, 3 et 4, la LED principale 2 se compose d'un corps parallélépipédique 10 rectangle, l'élément photoémetteur 11 de ladite LED principale 2 émergeant au centre d'une face dudit corps 10. A l'image de la LED secondaire 3, cette LED principale 2 est orientée dans la cavité du projecteur de façon à ce que les faisceaux lumineux qu'elle émet balayent tout l'espace situé sous le corps 10 de ladite LED principale 2, sur un secteur angulaire de 180°.With reference to figures 2, 3 and 4 , the main LED 2 consists of a rectangular parallelepipedic body 10, the light emitting element 11 of said main LED 2 emerging at the center of one face of said body 10. Like secondary LED 3, this main LED 2 is oriented in the cavity of the projector so that the light beams which it emits scan the entire space located under the body 10 of said main LED 2, over an angular sector of 180 °.

En se référant à la figure 3, la LED principale 2 et la LED secondaire 3 sont alignées selon un plan horizontal. Préférentiellement, les deux éléments photoémetteurs 9,11 desdites LED 2,3 sont alignés suivant un axe horizontal.With reference to the figure 3 , the main LED 2 and the secondary LED 3 are aligned in a horizontal plane. Preferably, the two photoemitter elements 9,11 of said LEDs 2,3 are aligned along a horizontal axis.

En se référant aux figures 1 et 2, la LED principale 2 est située entre le réflecteur principal 4, et l'ensemble constitué par le réflecteur secondaire 5 et la LED secondaire 3. Plus précisément, l'élément photoémetteur 11 de la diode principale 2 est placé au niveau du deuxième foyer 12 du réflecteur secondaire ellipsoïdal 5, selon une direction longitudinal X du véhicule, mais est décalée verticalement par rapport audit deuxième foyer 12. En effet, l'élément photoémetteur 11 est placé au-dessus de ce deuxième foyer 12 fictif, le décalage en hauteur correspondant à la hauteur d'un faisceau DRL. Si le réflecteur principal 4 est symétrique, l'élément photoémetteur 11 de la LED principale 2 et le deuxième foyer 12 sont alignés selon un axe vertical Z. Si le réflecteur principal 5 est asymétrique, l'élément photoémetteur 11 et ledit deuxième foyer 12 sont décalés selon un axe transversal Y du véhicule.With reference to figures 1 and 2 , the main LED 2 is located between the main reflector 4, and the assembly consisting of the secondary reflector 5 and the secondary LED 3. More precisely, the light emitting element 11 of the main diode 2 is placed at the level of the second focus 12 of the ellipsoidal secondary reflector 5, in a longitudinal direction X of the vehicle, but is offset vertically with respect to said second focal point 12. In fact, the light emitting element 11 is placed above this fictitious second focal point 12, the corresponding offset in height at the height of a DRL beam. If the main reflector 4 is symmetrical, the light emitting element 11 of the main LED 2 and the second focus 12 are aligned along a vertical axis Z. If the main reflector 5 is asymmetrical, the light emitting element 11 and said second focus 12 are offset along a transverse axis Y of the vehicle.

En se référant à la figure 5, les faisceaux 13 issus de la LED principale 2 et qui sont interceptés par le réflecteur principal 4 sont renvoyés vers le bas de la coupure pour assurer la fonction éclairage du véhicule. Une infime partie des faisceaux issus de ladite LED principale 2 est interceptée par le réflecteur secondaire 5, pour être ensuite réfléchie vers le haut, sans remplir de fonction spécifique au sein du véhicule. Il est à préciser que le réflecteur secondaire 5 ne perturbe en aucune façon la fonction éclairage produite par la LED principale 2 en combinaison avec le réflecteur principal 4. Les faisceaux 14 issus de la LED secondaire 3 et qui impactent directement le réflecteur principal 4, sont renvoyés par celui-ci vers le haut du véhicule, pour assurer la composante de la fonction DRL au-dessus de la coupure. Les faisceaux 15 issus de ladite LED secondaire 3 et qui sont réfléchis une première fois par le réflecteur secondaire 5 puis une seconde fois par le réflecteur principal 4, sont renvoyés vers le bas du véhicule, pour assurer composante de la fonction DRL au-dessous la coupure.With reference to the figure 5 , the beams 13 coming from the main LED 2 and which are intercepted by the main reflector 4 are returned to the bottom of the cut-off to provide the vehicle lighting function. A tiny part of the beams coming from said main LED 2 is intercepted by the secondary reflector 5, to then be reflected upwards, without fulfilling a specific function within the vehicle. It should be noted that the secondary reflector 5 in no way disturbs the lighting function produced by the main LED 2 in combination with the main reflector 4. The beams 14 coming from the secondary LED 3 and which directly impact the main reflector 4, are returned by the latter to the top of the vehicle, to provide the component of the DRL function above the cut-off. The beams 15 coming from said secondary LED 3 and which are reflected a first time by the secondary reflector 5 and then a second time by the main reflector 4, are returned to the bottom of the vehicle, to ensure component of the DRL function below the cut.

Ainsi, un dispositif selon l'invention, regroupant la LED principale 2, la LED secondaire 3, le réflecteur principal 4 et le réflecteur secondaire 5 tels qu'ils sont agencés dans le premier mode de réalisation préféré décrit ci-avant, permet d'assurer une fonction d'éclairage et de signalisation du véhicule avec une signature commune pour lesdites fonctions. De plus, le réflecteur secondaire 5 constituant la partie la plus en avant du dispositif 1, permet également de jouer le rôle d'un cache ayant pour fonction d'occulter au moins partiellement les deux LED 2,3 et d'éviter à un individu regardant l'intérieur du projecteur d'être ébloui.Thus, a device according to the invention, grouping the main LED 2, the secondary LED 3, the main reflector 4 and the secondary reflector 5 as they are arranged in the first preferred embodiment described above, makes it possible to providing a vehicle lighting and signaling function with a common signature for said functions. In addition, the secondary reflector 5 constituting the most forward part of the device 1, also makes it possible to play the role of a cover whose function is to at least partially obscure the two LEDs 2, 3 and to prevent an individual looking inside of the projector to be dazzled.

En se référant aux figures 6 et 7 un deuxième mode de réalisation préféré d'un dispositif 100 selon l'invention se différencie du premier mode ci-avant décrit, par le fait que le réflecteur secondaire 105 a une forme parabolique et non plus ellipsoïdale. La LED principale 102 et le réflecteur principal 104 demeurent inchangés par rapport au premier mode de réalisation, que ce soit au niveau de leurs caractéristiques intrinsèques ou de leur agencement relatif.With reference to figures 6 and 7 a second preferred embodiment of a device 100 according to the invention differs from the first embodiment described above, in that the secondary reflector 105 has a parabolic shape and no longer an ellipsoidal shape. The main LED 102 and the main reflector 104 remain unchanged from the first embodiment, either in their intrinsic characteristics or in their relative arrangement.

Pour ce deuxième mode de réalisation préféré, le réflecteur secondaire 105 est matérialisée par une paroi 108 parabolique incurvée, comportant une surface interne réfléchissante. Cette paroi incurvée 108 présente une hauteur maximale au niveau de sa partie centrale 121, et une hauteur minimale au niveau de chacune de ses deux extrémités 122 situées de par et d'autre de ladite zone centrale 121, ladite hauteur se réduisant progressivement entre ladite partie centrale 121 et lesdites extrémités 122. La surface interne réfléchissante possède un plan de symétrie vertical s'étendant selon un axe longitudinal X du véhicule. Ce réflecteur secondaire 105 est placé devant le réflecteur principal 104 de sorte que sa surface réfléchissante soit orientée vers la face réfléchissante dudit réflecteur principal 104. La LED secondaire 103 est placée à l'intérieur du réflecteur secondaire 105, au niveau de son bord 120 le plus haut, en étant parallèle audit bord 120. De cette manière, la LED secondaire 103 se retrouve inclinée par rapport à la LED principale 102 qui est horizontale.For this second preferred embodiment, the secondary reflector 105 is materialized by a curved parabolic wall 108, comprising a reflective internal surface. This curved wall 108 has a maximum height at the level of its central part 121, and a minimum height at the level of each of its two ends 122 located on either side of said central zone 121, said height gradually reducing between said part central 121 and said ends 122. The reflective internal surface has a vertical plane of symmetry extending along a longitudinal axis X of the vehicle. This secondary reflector 105 is placed in front of the main reflector 104 so that its reflecting surface is oriented towards the reflecting face of said main reflector 104. The secondary LED 103 is placed inside the secondary reflector 105, at its edge 120 le. higher, while being parallel to said edge 120. In this way, the secondary LED 103 is found inclined relative to the main LED 102 which is horizontal.

Les faisceaux lumineux issus de la LED principale 102 et de la LED secondaire 103 ont des trajectoires analogues à celles des faisceaux lumineux décrits à la figure 5 relative au premier mode de réalisation, pour permettre d'assurer une fonction d'éclairage du véhicule et une fonction de signalisation de jour dudit véhicule ayant la même signature. Pour ce deuxième mode de réalisation, le réflecteur secondaire 105 joue également le rôle d'un cache anti éblouissement.The light beams from the main LED 102 and from the secondary LED 103 have trajectories similar to those of the light beams described in figure 5 relating to the first embodiment, to make it possible to provide a vehicle lighting function and a daytime signaling function of said vehicle having the same signature. For this second mode of embodiment, the secondary reflector 105 also plays the role of an anti-glare mask.

Il peut également être envisagé d'autres formes et de géométries pour le réflecteur secondaire, l'essentiel étant qu'il possède une certaine symétrie afin de placer correctement la LED secondaire qui lui sera associée.It is also possible to envisage other shapes and geometries for the secondary reflector, the main thing being that it has a certain symmetry in order to correctly place the secondary LED which will be associated with it.

Claims (10)

  1. Device (1, 100) for lighting and signaling a vehicle, comprising at least one cavity delimited by a main reflector (4, 104) defining an optical axis, said cavity comprising at least one main light source (2, 102) capable of illuminating a road in combination with said main reflector (4, 104), said at least one cavity contains a secondary light source (3, 103) and a secondary reflector (5, 105), said secondary source (3, 103) being positioned in the cavity in such a way that the secondary reflector (5,105) recovers part of the luminous flux from said secondary source (3, 103), and in that said two sources (2, 3, 102, 103) and said two reflectors (4, 5, 104, 105) are arranged in the cavity to provide both a lighting and a signaling function for the vehicle, characterized in that the main light source and the secondary light source are each represented by a light-emitting diode (2, 3, 102, 103), in that to illuminate the road, the main reflector is shaped to reflect the rays of the main light source below a predominantly horizontal cut-off so as not to dazzle motorists arriving in front and in that the said main reflector comprises a focus, the rays coming from this focus and reaching the main reflector directly being reflected by the main reflector below a predominantly horizontal cut-off, the main reflector also makes it possible to reflect the rays coming directly from the secondary source above the said cut-off as well as the rays coming from the said secondary source and reflected a first time by the secondary reflector, below this cut-off, and in that, in an orthonormal mark defined by three orthogonal directions in space, the secondary reflector (5, 105) is focused on the focus of the main reflector (4, 104) in two of these directions and offset in the remaining direction, the said secondary reflector (5, 105) being ellipsoidal or parabolic and capable of returning the beams coming from the secondary diode (3, 103) which impact it, systematically towards the main reflector (4, 104).
  2. Device according to claim 1, characterized in that the reflecting side of the main reflector (4,104) and the reflecting side of the secondary reflector (5,105) face each other.
  3. A device according to any one of claims 1 or 2, characterized in that the main light source (2,102) and the secondary light source (3,103) are located between the main reflector (4,104) and the secondary reflector (5,105).
  4. A device according to claim 3, characterized in that the secondary reflector (5,105) is curved and delimits a space, and in that the secondary light source (3,103) is placed at said space and the main light source (2,102) is placed between said secondary light source (5,105) and the main reflector (4,104).
  5. A device according to any one of claims 1 to 4, characterized in that the secondary reflector (5) being ellipsoidal, the secondary diode (3) and the main diode (2) are aligned on the same plane.
  6. A device according to any one of claims 1 or 5, characterized in that the secondary reflector (5) being ellipsoidal, the main diode (2) is centered on the optical axis of the main reflector (4).
  7. A device according to any one of claims 1, 5 or 6, characterized in that the secondary reflector (5) being ellipsoidal, the secondary diode (3) is placed at the first focus of the secondary reflector (5).
  8. A device according to claim 7, characterized in that the secondary ellipsoidal reflector (5) in an orthonormal mark defined by three orthogonal directions in space, the second focus (12) of the secondary reflector (5, 105) is focused on the main diode (2) in two of these directions and offset in a remaining direction, perpendicular to the optical axis.
  9. A device according to any one of claims 1 to 4, characterized in that the secondary reflector (105) being parabolic, the secondary diode (103) and the main diode (102) are inclined with respect to each other.
  10. A vehicle headlamp, comprising a device (1,100) complying with any of claims 1 to 9.
EP14165665.2A 2013-05-03 2014-04-23 Vehicle headlamp Active EP2799763B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1354109A FR3005342B1 (en) 2013-05-03 2013-05-03 DEVICE FOR LIGHTING AND SIGNALING A VEHICLE

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EP2799763A1 EP2799763A1 (en) 2014-11-05
EP2799763B1 true EP2799763B1 (en) 2020-11-18

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Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
JP2016181388A (en) * 2015-03-24 2016-10-13 スタンレー電気株式会社 Lighting appliance of vehicle
FR3039624B1 (en) * 2015-07-31 2020-01-17 Valeo Vision LIGHTING AND / OR SIGNALING DEVICE FOR VEHICLE

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1694485A (en) * 1926-01-28 1928-12-11 Newland Kelly Vehicle head lamp
IT1256883B (en) * 1992-07-17 1995-12-27 Carello Spa VEHICLE PROJECTOR, IN PARTICULAR OTHER VEHICLES.
FR2913750A1 (en) * 2007-03-14 2008-09-19 Valeo Vision Sa OPTICAL MODULE FOR MOTOR VEHICLE PROJECTOR
JP2009158386A (en) * 2007-12-27 2009-07-16 Koito Mfg Co Ltd Vehicle headlight
JP5643630B2 (en) * 2010-12-14 2014-12-17 株式会社小糸製作所 Lighting fixtures for vehicles

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EP2799763A1 (en) 2014-11-05
FR3005342B1 (en) 2017-08-11

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