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EP2754950A1 - Lighting flare for a motor vehicle - Google Patents

Lighting flare for a motor vehicle Download PDF

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Publication number
EP2754950A1
EP2754950A1 EP14151123.8A EP14151123A EP2754950A1 EP 2754950 A1 EP2754950 A1 EP 2754950A1 EP 14151123 A EP14151123 A EP 14151123A EP 2754950 A1 EP2754950 A1 EP 2754950A1
Authority
EP
European Patent Office
Prior art keywords
axis
lens
torch
lighting
light source
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.)
Granted
Application number
EP14151123.8A
Other languages
German (de)
French (fr)
Other versions
EP2754950B1 (en
Inventor
Cyril Rivier
Hassan Koulouh
Alexandre Aubry
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.)
AML Systems SAS
Original Assignee
AML Systems SAS
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Filing date
Publication date
Application filed by AML Systems SAS filed Critical AML Systems SAS
Publication of EP2754950A1 publication Critical patent/EP2754950A1/en
Application granted granted Critical
Publication of EP2754950B1 publication Critical patent/EP2754950B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • 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
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates

Definitions

  • the field of the invention is that of projectors for motor vehicles.
  • a projector generally comprises a light source producing a light beam and means for moving and / or deforming the light beam to adapt it to the driving circumstances.
  • the invention is more particularly concerned with lighting torch type projectors capable of continuously directing the light beam produced, in addition to the usual road projectors, towards an identified object present on or in the vicinity of the vehicle path. .
  • Driving assistance systems are known that make it possible to detect a potential obstacle, for example a pedestrian or an animal, on the road.
  • These systems that are useful in a dark environment, for example at night or in a tunnel, generally comprise a sensor, such as an infra-red camera, which detects the presence of such an obstacle.
  • a light source is then controlled to illuminate the obstacle and an actuator moves the entire lighting torch so that the beam follows the obstacle.
  • the light source must move quickly so that the obstacle remains illuminated and it is thus necessary to have an actuator capable of setting the torch in motion accurately and quickly.
  • Such actuators are however complex and bulky.
  • the invention thus aims at improving the situation by proposing a lighting torch for a motor vehicle comprising a light source producing a light beam directed along a first axis intended to be oriented towards the front of the vehicle, said torch comprising a lens, characterized in that said light source projects the entire beam directly onto the lens, without reflection or closure, said lens being arranged to move in rotation about a second axis intended to be oriented towards the top of the vehicle.
  • the light beam is projected directly on the lens and is never reflected on its path between the light source and the lens.
  • the light torch therefore does not include an optical element between the light source and the lens, and the invention thus makes it possible to obtain a simplified lighting torch.
  • the lens needs to be moved to rotate the beam.
  • the rotation around the vertical axis makes it possible to move the light beam so that it continuously illuminates a particular object, for example an obstacle on the road both when the vehicle is stopped and when it is in motion . Since the mass of the lens is smaller than that of the entire illumination torch, it will be possible to use a more compact actuating system and / or to move the lens more rapidly.
  • the slight deformation of the beam directed by the lens is not a problem here because the light / dark border must not respect the same rules as those existing for elliptical floodlights intended to illuminate the road.
  • said light beam is of substantially elongate shape along the second axis.
  • the deformation of a beam which is due to the displacement of the lens is greater at the upper end of the beam than at the levels of the lateral ends which remain little changed.
  • the lateral amplitude of the beam is thus little modified by the rotation of the lens and the torch of the invention thus makes it possible to accurately target objects located on the roadside without the deformation of the beam poses problems.
  • the verticality of the beam makes it possible to illuminate any obstacle by only rotating about a vertical axis.
  • the torch is thus able to illuminate objects both near and far of the vehicle, or to follow the evolution of the obstacle relative to the vehicle by rotating about a single axis of rotation.
  • the light beam is projected by the lens and forms an image forming part of a rectangle in a plane perpendicular to the first axis, the long sides of the rectangle extending along the second axis and the small sides rectangle extending along a third axis perpendicular to the first axis and the second axis.
  • a verticality of the beam is obtained making it possible to aim near and far objects of the vehicle by rotating about a single axis of rotation, that is to say the second axis.
  • a rectangle is understood to mean a form, preferably convex, that comes tangent to the four sides of said rectangle.
  • the length of the long sides is 2 to 10 times greater than the length of the short sides, including 4 to 6 times greater.
  • the light beam is projected by the lens and forms an image projected at a given length of the illumination torch measured along the first axis, the image then having a width measured along a third axis perpendicular to the first axis. axis and the second axis which is between 1 and 5% of said length.
  • the light source comprises at least one light emitting diode.
  • Light-emitting diodes are particularly advantageous because they are point sources of light.
  • the light source comprises a series of light-emitting diodes arranged linearly along the second axis. These diodes are oriented towards the optical axis of the lens when the latter is in its rest position.
  • the lighting torch comprises a lighting module on which is positioned the light source.
  • the lens is mounted on the lighting module by means of at least one connection allowing rotation of the lens relative to the lighting module along the second axis.
  • said lighting torch comprises an actuator arranged to rotate said lens around the second axis. Thanks to the invention, the actuator can be chosen more compact and lighter to rotate only the lens.
  • the invention also relates to a motor vehicle headlamp comprising a lighting torch as defined above
  • the invention finally relates to a motor vehicle comprising a lighting torch as defined above.
  • the figures 1 , 2 , 3a and 3b represent an embodiment of the lighting torch 2 for a motor vehicle according to the invention.
  • the torch 2 comprises a light source 4, here a light emitting diode, and a lens 6 mounted on a lens holder 7 disposed on a lighting module 8.
  • the lighting module comprises a base 9, on which the lens holder 7 is mounted, and a body 10 on which the light source is mounted.
  • the light rays of the light source 4 are emitted directly towards the lens 6 to form a light beam of great intensity and long range. It is noted here that the beam is not deviated or obstructed in its path between the light source 4 and the lens 6. In other words, the whole of the light beam emitted by the light source 4, that is to say the all of the light energy emitted by the source, to the parasitic losses near, is projected directly on the lens 6.
  • the light-emitting diode is arranged on a printed circuit board 5, located here on the body 10 of the lighting module.
  • the light beam produced by the light-emitting diode is directed along a first axis X oriented towards the front of the vehicle in order to optimally illuminate any obstacle occurring on or beside the road taken by the vehicle.
  • Forward direction of the vehicle means any direction from a plane perpendicular to a longitudinal axis of the vehicle and heading towards the front of the vehicle.
  • the torch 2 is intended to be used in a dark environment, for example at night or in a tunnel, to illuminate a potential obstacle moving on the road or at the edge of this road.
  • This obstacle is for example a pedestrian or an animal that may, for example, be about to cross the road or already crossing it.
  • the lens 6 is arranged to turn about a second axis Z oriented towards the top of the vehicle.
  • the second axis is in particular vertical and in particular perpendicular to the first axis.
  • the beam can then be directed on both sides of the road.
  • the light beam is further elongated along the second axis Z, so that the torch 2 can illuminate obstacles located laterally, near or far from the vehicle by rotating the lens only along one axis, namely the second axis Z
  • the light source here comprises a series of light-emitting diodes arranged linearly along the second vertical axis Z; they are oriented towards the optical axis of the lens 6.
  • the optical axis 6 is here defined when the lens is in the rest position, that is to say when it has not rotated to illuminate an obstacle. The optical axis is then aligned with the light source.
  • light beam elongated along the second axis Z we mean an elongated beam so that the image of the beam projected on a plane perpendicular to the first axis X and located in front of the torch is in a vertical rectangle, that is to say said elongated according to the second axis Z.
  • the vertical rectangle comprises large sides, measured along the second axis Z, 2 to 10 times larger than the small sides of the rectangle measured along a third axis Y, in particular perpendicular to the first axis X and the second axis Z.
  • the illumination may be from 2 to 20m high.
  • a rectangle is preferably chosen whose length of the long sides is much greater than that of the small sides, for example ten times larger, in the case where it is desired that the distance between the vehicle carrying the lighting torch of the invention and the first point of impact on the ground of the beam is low while illuminating an obstacle, either short or long distance, the lighting torch.
  • the torch of the invention is particularly interesting in the case where the driver can view a line on the ground indicating the direction of the obstacle to avoid.
  • the image of the beam projected by the lens has a width of between 1 to 5%, that is to say that the image of the beam projected by the lens on a wall located 100 meters from the present torch. a width of 1 meter to 5 meters on the wall.
  • a target located at 50 meters it allows to have an illumination on 0.5 to 2.5 meters wide, which is enough to mark an obstacle on the edge of the road, including a pedestrian.
  • the lens support 7 is rotatably mounted on the lighting module 8 between two links 11, 12.
  • the torch of the invention thus has a first rotatable connection 11 between the lens support 7 and the lighting module 8, which is situated above the lens along the second axis Z and a second rotary connection 12 between the lens support 7 and the lighting module 8, which is located below the lens according to the second axis Z.
  • the first link 11, the second link 12 and the optical axis of the lens 6 are aligned along the second axis Z.
  • the third axis Y in particular perpendicular to the first axis X and the second axis Z, defines, with the axis X, the horizontal.
  • the first link 11 is formed here of an outgrowth 13 of the lighting module 8 and a pin 14 of the lens support 7 inserted into the protrusion 13.
  • the second link 12 is formed in particular of a pin of the lens support 7 and of an orifice situated on the base 9 of the lighting module 8.
  • the pin of the first link 11 and that of the second link 12 are aligned along the second axis Z and thus allow the lens 6 to rotate about this axis.
  • the figures 1 and 2 represent the case where the lens is centered with respect to the torch, that is to say the case where the beam coming out of the lens is directed straight ahead of the vehicle.
  • the Figures 3a and 3b represent the cases in which the actuator has rotated the lens 6, in particular to follow an obstacle. In such a case, the beam is slightly deformed, but the resulting stray light, which develops mainly at its high and low ends, does not pose a problem here since it can not dazzle the passengers of the vehicles traveling in the direction reverse.
  • the torch 2 of the invention can be controlled by a driver assistance system.
  • a driver assistance system comprises image detection means comprising at least one sensor which collects information relating to the environment in which the vehicle is traveling.
  • This sensor is in particular an infrared camera directed according to the direction of movement of the vehicle to cover a distance of up to several hundred meters in front of the vehicle.
  • the detection means output at least one signal comprising data of the detected image to image processing means.
  • the image processing means here comprise a real-time video processor arranged to process rapidly, for example in less than one tenth of a second, the image data collected by the detection means.
  • This processor is also able to identify different types of objects on the road, to discriminate between stationary objects and moving objects and to calculate the trajectories of these objects.
  • the image processing means identify an obstacle, such as an animal or a pedestrian, moving on the road or in the vicinity of the road, they calculate its trajectory and provide its position in real time to means of controlling the actuating assembly of the torch 2 to position the light beam produced by the source 4 as appropriate to illuminate the obstacle.
  • an obstacle such as an animal or a pedestrian
  • control means controls the motor of the actuating assembly for driving the lens 6 in rotation.
  • the torch of the invention can form a separate projector in its own right, in particular dedicated to the tracking of obstacles. It can also be part of an existing projector, including a fog lamp.

Landscapes

  • 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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The spotlight (2) has a light source producing a light beam directed along a first axis (X) that is oriented toward front of a vehicle, where the spotlight comprises a lens. The light source projects the beam directly onto the lens without reflection or obturation. The lens is arranged to move in rotation about a second axis (Z) oriented toward a top part of the vehicle. The light beam has a shape elongated along the second axis. The light beam is projected by the lens, and forms an image with rectangular shape having short sides and long sides in a plane perpendicular to the first axis.

Description

Le domaine de l'invention est celui des projecteurs pour véhicules automobiles.The field of the invention is that of projectors for motor vehicles.

Un projecteur comprend généralement une source lumineuse produisant un faisceau lumineux et des moyens de déplacement et/ou de déformation du faisceau lumineux pour l'adapter aux circonstances de la conduite.A projector generally comprises a light source producing a light beam and means for moving and / or deforming the light beam to adapt it to the driving circumstances.

L'invention s'intéresse plus particulièrement aux projecteurs de type torche d'éclairage aptes à diriger de manière continue le faisceau lumineux produit, en sus des projecteurs de route habituels, vers un objet identifié présent sur, ou au voisinage, du trajet du véhicule.The invention is more particularly concerned with lighting torch type projectors capable of continuously directing the light beam produced, in addition to the usual road projectors, towards an identified object present on or in the vicinity of the vehicle path. .

On connaît des systèmes d'aide à la conduite permettant de détecter un obstacle potentiel, par exemple un piéton ou un animal, sur la route. Ces systèmes utiles dans un environnement sombre, par exemple la nuit ou dans un tunnel, comprennent généralement un capteur, de type caméra infra-rouge, qui détecte la présence d'un tel obstacle. Une source lumineuse est alors commandée pour éclairer l'obstacle et un actionneur met en mouvement l'ensemble de la torche d'éclairage afin que le faisceau suive l'obstacle.Driving assistance systems are known that make it possible to detect a potential obstacle, for example a pedestrian or an animal, on the road. These systems that are useful in a dark environment, for example at night or in a tunnel, generally comprise a sensor, such as an infra-red camera, which detects the presence of such an obstacle. A light source is then controlled to illuminate the obstacle and an actuator moves the entire lighting torch so that the beam follows the obstacle.

Etant donné que le véhicule et l'obstacle peuvent se déplacer simultanément dans des directions différentes, la source lumineuse doit se déplacer rapidement pour que l'obstacle reste éclairé et il est ainsi nécessaire de disposer d'un actionneur capable de mettre en mouvement la torche de manière précise et rapide. De tels actionneurs sont cependant complexes et encombrants.Since the vehicle and the obstacle can move simultaneously in different directions, the light source must move quickly so that the obstacle remains illuminated and it is thus necessary to have an actuator capable of setting the torch in motion accurately and quickly. Such actuators are however complex and bulky.

Dans le domaine des projecteurs elliptiques destinés à éclairer la route, il est connu pour diriger le faisceau dans les virages, de faire pivoter non pas le projecteur elliptique en entier mais seulement la lentille. Ce genre de solution rencontre cependant des difficultés d'applications car le faisceau lumineux est déformé lors du déplacement de la lentille. Il en résulte que la frontière lumière/obscurité peut ne plus respecter les normes en vigueur pour les projecteurs destinés à éclairer la route. Des solutions existent pour contrôler la position de la frontière lumière /obscurité lorsque la lentille est déplacée mais elles impliquent la présence dans le projecteur elliptique d'éléments optiques complexes, déviant le faisceau avant qu'il n'atteigne la lentille.In the field of elliptical floodlights intended to illuminate the road, it is known to direct the beam in bends, to rotate not the whole elliptical projector but only the lens. This kind of solution, however, faces application difficulties because the light beam is deformed during the displacement of the lens. As a result, the light / dark border may no longer meet the standards in force for projectors intended to illuminate the road. Solutions exist to control the position of the light / dark boundary when the lens is displaced but they involve the presence in the elliptical projector of complex optical elements, deflecting the beam before it reaches the lens.

L'invention vise ainsi à améliorer la situation en proposant une torche d'éclairage pour véhicule automobile comportant une source lumineuse produisant un faisceau lumineux dirigé selon un premier axe destiné à être orienté vers l'avant du véhicule, ladite torche comprenant une lentille, caractérisé par le fait que ladite source lumineuse projette l'ensemble du faisceau directement sur la lentille, sans réflexion ni obturation, ladite lentille étant agencée pour se déplacer en rotation autour d'un deuxième axe destiné à être orienté vers le haut du véhicule.The invention thus aims at improving the situation by proposing a lighting torch for a motor vehicle comprising a light source producing a light beam directed along a first axis intended to be oriented towards the front of the vehicle, said torch comprising a lens, characterized in that said light source projects the entire beam directly onto the lens, without reflection or closure, said lens being arranged to move in rotation about a second axis intended to be oriented towards the top of the vehicle.

Ainsi, le faisceau lumineux est projeté directement sur la lentille et n'est jamais réfléchi sur son trajet entre la source lumineuse et la lentille. La torche lumineuse ne comprend donc pas d'élément d'optique entre la source lumineuse et la lentille et l'invention permet ainsi d'obtenir une torche d'éclairage simplifiée.Thus, the light beam is projected directly on the lens and is never reflected on its path between the light source and the lens. The light torch therefore does not include an optical element between the light source and the lens, and the invention thus makes it possible to obtain a simplified lighting torch.

En outre, seule la lentille doit être déplacée pour faire tourner le faisceau. La rotation autour de l'axe vertical permet de déplacer le faisceau lumineux afin qu'il éclaire de manière continue un objet particulier, par exemple un obstacle sur la route aussi bien lorsque le véhicule est à l'arrêt que lorsqu'il est en mouvement. La masse de la lentille étant plus faible que celle de l'ensemble de la torche d'éclairage, il sera possible d'utiliser un système d'actionnement plus compact et/ou de déplacer la lentille de manière plus rapide.In addition, only the lens needs to be moved to rotate the beam. The rotation around the vertical axis makes it possible to move the light beam so that it continuously illuminates a particular object, for example an obstacle on the road both when the vehicle is stopped and when it is in motion . Since the mass of the lens is smaller than that of the entire illumination torch, it will be possible to use a more compact actuating system and / or to move the lens more rapidly.

La légère déformation du faisceau dirigé par la lentille n'est pas gênante ici car la frontière lumière/obscurité ne doit pas respecter les mêmes règles que celles existantes pour les projecteurs elliptiques destinés à éclairer la route.The slight deformation of the beam directed by the lens is not a problem here because the light / dark border must not respect the same rules as those existing for elliptical floodlights intended to illuminate the road.

Selon un aspect de l'invention, ledit faisceau lumineux est de forme sensiblement allongée selon le deuxième axe. Or, la déformation d'un faisceau qui est due au déplacement de la lentille est plus importante au niveau de l'extrémité haute du faisceau qu'aux niveaux des extrémités latérales qui restent peu modifiées. L'amplitude latérale du faisceau est ainsi peu modifiée par la rotation de la lentille et la torche de l'invention permet donc de viser de manière précise les objets situés sur le bord de la route sans que les déformations du faisceau ne posent problèmes.According to one aspect of the invention, said light beam is of substantially elongate shape along the second axis. However, the deformation of a beam which is due to the displacement of the lens is greater at the upper end of the beam than at the levels of the lateral ends which remain little changed. The lateral amplitude of the beam is thus little modified by the rotation of the lens and the torch of the invention thus makes it possible to accurately target objects located on the roadside without the deformation of the beam poses problems.

Ainsi, la verticalité du faisceau permet d'éclairer tout obstacle en effectuant seulement une rotation autour d'un axe vertical. En effet, la torche est ainsi capable d'illuminer des objets tant proches que lointains du véhicule, ou de suivre l'évolution de l'obstacle par rapport au véhicule en effectuant une rotation autour d'un seul axe de rotation.Thus, the verticality of the beam makes it possible to illuminate any obstacle by only rotating about a vertical axis. Indeed, the torch is thus able to illuminate objects both near and far of the vehicle, or to follow the evolution of the obstacle relative to the vehicle by rotating about a single axis of rotation.

Selon un aspect de l'invention, le faisceau lumineux est projeté par la lentille et forme une image s'inscrivant dans un rectangle dans un plan perpendiculaire au premier axe, les grands cotés du rectangle s'étendant selon le deuxième axe et les petits cotés du rectangle s'étendant selon un troisième axe perpendiculaire au premier axe et au deuxième axe. On obtient de la sorte une verticalité du faisceau permettant de viser des objets proches et lointains du véhicule en effectuant une rotation autour d'un seul axe de rotation, c'est-à-dire le deuxième axe. On entend par s'inscrivant dans un rectangle une forme, de préférence convexe, qui vient tangenter les quatre cotés dudit rectangle.According to one aspect of the invention, the light beam is projected by the lens and forms an image forming part of a rectangle in a plane perpendicular to the first axis, the long sides of the rectangle extending along the second axis and the small sides rectangle extending along a third axis perpendicular to the first axis and the second axis. In this way, a verticality of the beam is obtained making it possible to aim near and far objects of the vehicle by rotating about a single axis of rotation, that is to say the second axis. A rectangle is understood to mean a form, preferably convex, that comes tangent to the four sides of said rectangle.

Avantageusement, la longueur des grands cotés est 2 à 10 fois supérieure à la longueur des petits cotés, notamment 4 à 6 fois supérieure.Advantageously, the length of the long sides is 2 to 10 times greater than the length of the short sides, including 4 to 6 times greater.

Selon un exemple de réalisation, le faisceau lumineux est projeté par la lentille et forme une image projetée à une longueur donnée de la torche d'éclairage mesurée selon le premier axe, l'image présentant alors une largeur mesurée selon un troisième axe perpendiculaire au premier axe et au deuxième axe qui est comprise entre 1 et 5% de ladite longueur.According to an exemplary embodiment, the light beam is projected by the lens and forms an image projected at a given length of the illumination torch measured along the first axis, the image then having a width measured along a third axis perpendicular to the first axis. axis and the second axis which is between 1 and 5% of said length.

Selon un exemple de réalisation de l'invention, la source lumineuse comprend au moins une diode électroluminescente. Les diodes électroluminescentes sont particulièrement avantageuses car elles sont des sources de lumière ponctuelles.According to an exemplary embodiment of the invention, the light source comprises at least one light emitting diode. Light-emitting diodes are particularly advantageous because they are point sources of light.

Selon un aspect de l'invention, la source lumineuse comprend une série de diodes électroluminescentes, disposées linéairement selon le deuxième axe. Ces diodes sont orientées en direction de l'axe optique de la lentille lorsque celle-ci est dans sa position de repos.According to one aspect of the invention, the light source comprises a series of light-emitting diodes arranged linearly along the second axis. These diodes are oriented towards the optical axis of the lens when the latter is in its rest position.

Avantageusement, la torche d'éclairage comprend un module d'éclairage sur lequel est positionnée la source lumineuse.Advantageously, the lighting torch comprises a lighting module on which is positioned the light source.

Selon un aspect de l'invention, la lentille est montée sur le module d'éclairage par l'intermédiaire d'au moins une liaison autorisant la rotation de la lentille par rapport au module d'éclairage selon le deuxième axe.According to one aspect of the invention, the lens is mounted on the lighting module by means of at least one connection allowing rotation of the lens relative to the lighting module along the second axis.

Selon un exemple de réalisation de l'invention, ladite torche d'éclairage comprend un actionneur agencé pour faire tourner ladite lentille autour du deuxième axe. Grâce à l'invention, l'actionneur peut être choisi plus compact et moins lourd afin de faire pivoter uniquement la lentille.According to an exemplary embodiment of the invention, said lighting torch comprises an actuator arranged to rotate said lens around the second axis. Thanks to the invention, the actuator can be chosen more compact and lighter to rotate only the lens.

L'invention concerne aussi un projecteur pour véhicule automobile comprenant une torche d'éclairage telle que définie précédemmentThe invention also relates to a motor vehicle headlamp comprising a lighting torch as defined above

L'invention concerne enfin un véhicule automobile comprenant une torche d'éclairage telle que définie précédemment.The invention finally relates to a motor vehicle comprising a lighting torch as defined above.

L'invention sera mieux comprise à la lumière de la description suivante qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter, accompagnée des dessins joints parmi lesquels :

  • la figure 1 est une vue schématique en perspective d'une torche selon un mode de réalisation de l'invention ;
  • les figures 2, 3a et 3b sont des vues schématiques de la torche de la figure 1 vue de haut, avec une lentille respectivement en position de repos et dans ses positions extrêmes de rotation.
The invention will be better understood in the light of the following description which is given only as an indication and which is not intended to limit it, accompanied by the appended drawings among which:
  • the figure 1 is a schematic perspective view of a torch according to one embodiment of the invention;
  • the figures 2 , 3a and 3b are schematic views of the torch of the figure 1 view from above, with a lens respectively in the rest position and in its extreme rotational positions.

Les figures 1, 2, 3a et 3b représentent une forme de réalisation de la torche d'éclairage 2 pour véhicule automobile selon l'invention.The figures 1 , 2 , 3a and 3b represent an embodiment of the lighting torch 2 for a motor vehicle according to the invention.

La torche 2 comprend une source lumineuse 4, ici une diode électroluminescente, et une lentille 6 montée sur un support de lentille 7 disposé sur un module d'éclairage 8. Le module d'éclairage comprend une base 9, sur laquelle le support de lentille 7 est monté, et un corps 10 sur lequel la source lumineuse est montée. Les rayons lumineux de la source lumineuse 4 sont émis directement en direction de la lentille 6 pour former un faisceau lumineux de très grande intensité et de longue portée. On remarque ici que le faisceau n'est aucunement dévié ni obstrué dans son trajet entre la source lumineuse 4 et la lentille 6. Autrement dit, l'ensemble du faisceau lumineux émis par la source lumineuse 4, c'est-à-dire la totalité de l'énergie lumineuse émise par la source, aux déperditions parasites près, est projetée directement sur la lentille 6.The torch 2 comprises a light source 4, here a light emitting diode, and a lens 6 mounted on a lens holder 7 disposed on a lighting module 8. The lighting module comprises a base 9, on which the lens holder 7 is mounted, and a body 10 on which the light source is mounted. The light rays of the light source 4 are emitted directly towards the lens 6 to form a light beam of great intensity and long range. It is noted here that the beam is not deviated or obstructed in its path between the light source 4 and the lens 6. In other words, the whole of the light beam emitted by the light source 4, that is to say the all of the light energy emitted by the source, to the parasitic losses near, is projected directly on the lens 6.

La diode électroluminescente est agencée sur une carte à circuit imprimé 5, située ici sur le corps 10 du module d'éclairage. Le faisceau lumineux produit par cette diode électroluminescente est dirigé selon un premier axe X orienté vers l'avant du véhicule afin d'éclairer de manière optimale tout obstacle se présentant sur ou à côté de la route empruntée par le véhicule. On entend par orientation vers l'avant du véhicule, toute direction partant d'un plan perpendiculaire à un axe longitudinal du véhicule et se dirigeant vers l'avant du véhicule.The light-emitting diode is arranged on a printed circuit board 5, located here on the body 10 of the lighting module. The light beam produced by the light-emitting diode is directed along a first axis X oriented towards the front of the vehicle in order to optimally illuminate any obstacle occurring on or beside the road taken by the vehicle. Forward direction of the vehicle means any direction from a plane perpendicular to a longitudinal axis of the vehicle and heading towards the front of the vehicle.

La torche 2 est destinée à être utilisée dans un environnement sombre, par exemple la nuit ou dans un tunnel, pour éclairer un obstacle potentiel en mouvement sur la route ou au bord de cette route. Cet obstacle est par exemple un piéton ou un animal qui peut, par exemple, être sur le point de traverser la route ou déjà en train de la traverser.The torch 2 is intended to be used in a dark environment, for example at night or in a tunnel, to illuminate a potential obstacle moving on the road or at the edge of this road. This obstacle is for example a pedestrian or an animal that may, for example, be about to cross the road or already crossing it.

Pour pouvoir éclairer de manière continue cet obstacle en mouvement, le véhicule lui-même étant en mouvement, la lentille 6 est agencée pour tourner autour d'un deuxième axe Z orienté vers le haut du véhicule. Le deuxième axe est notamment vertical et en particulier perpendiculaire au premier axe. Le faisceau pourra alors être dirigé de part et d'autre de la route. Le faisceau lumineux est en outre allongé selon le deuxième axe Z, de sorte que la torche 2 puisse éclairer des obstacles, situés latéralement, proches ou lointains du véhicule en effectuant une rotation de la lentille uniquement selon un axe, à savoir le deuxième axe Z. Pour cela, la source lumineuse comprend ici une série de diodes électroluminescentes, disposées linéairement selon le deuxième axe vertical Z; elles sont orientées en direction de l'axe optique de la lentille 6. L'axe optique 6 est ici défini lorsque la lentille est en position de repos, c'est-à-dire lorsqu'elle n'a pas effectué de rotation pour éclairer un obstacle. L'axe optique est alors aligné avec la source lumineuse.In order to be able to continuously illuminate this obstacle in motion, the vehicle itself being in motion, the lens 6 is arranged to turn about a second axis Z oriented towards the top of the vehicle. The second axis is in particular vertical and in particular perpendicular to the first axis. The beam can then be directed on both sides of the road. The light beam is further elongated along the second axis Z, so that the torch 2 can illuminate obstacles located laterally, near or far from the vehicle by rotating the lens only along one axis, namely the second axis Z For this, the light source here comprises a series of light-emitting diodes arranged linearly along the second vertical axis Z; they are oriented towards the optical axis of the lens 6. The optical axis 6 is here defined when the lens is in the rest position, that is to say when it has not rotated to illuminate an obstacle. The optical axis is then aligned with the light source.

Par faisceau lumineux allongé selon le deuxième axe Z, nous entendons un faisceau allongé de sorte que l'image du faisceau projetée sur un plan perpendiculaire au premier axe X et situé devant la torche s'inscrit dans un rectangle vertical, c'est-à-dire allongé selon le deuxième axe Z. Avantageusement, le rectangle verticale comprend des grands cotés, mesurés selon le deuxième axe Z, 2 à 10 fois plus grand que les petits cotés du rectangle mesurés selon un troisième axe Y, notamment perpendiculaire au premier axe X et au deuxième axe Z. Par exemple, dans le cas d'un éclairement de 1 à 2 m de large sur un mur vertical situé à 50m du projecteur, l'éclairement pourra être de 2 à 20m de haut.By light beam elongated along the second axis Z, we mean an elongated beam so that the image of the beam projected on a plane perpendicular to the first axis X and located in front of the torch is in a vertical rectangle, that is to say said elongated according to the second axis Z. Advantageously, the vertical rectangle comprises large sides, measured along the second axis Z, 2 to 10 times larger than the small sides of the rectangle measured along a third axis Y, in particular perpendicular to the first axis X and the second axis Z. For example, in the case of an illumination of 1 to 2 m wide on a vertical wall located 50m from the projector, the illumination may be from 2 to 20m high.

On choisira de préférence un rectangle dont la longueur des grands cotés est beaucoup plus grande que celle des petits cotés, par exemple dix fois plus grande, dans le cas où l'on souhaite que la distance entre le véhicule embarquant la torche d'éclairage de l'invention et le premier point d'impact au sol du faisceau soit faible tout en éclairant un obstacle, soit à courte, soit à longue distance, de la torche d'éclairage. En effet, la torche de l'invention est particulièrement intéressante dans le cas où le conducteur peut visualiser une ligne au sol indiquant la direction de l'obstacle à éviter.A rectangle is preferably chosen whose length of the long sides is much greater than that of the small sides, for example ten times larger, in the case where it is desired that the distance between the vehicle carrying the lighting torch of the invention and the first point of impact on the ground of the beam is low while illuminating an obstacle, either short or long distance, the lighting torch. Indeed, the torch of the invention is particularly interesting in the case where the driver can view a line on the ground indicating the direction of the obstacle to avoid.

Au contraire, il est également possible de réduire le marquage au sol en proposant un rectangle dont la longueur des grands cotés est légèrement supérieure à celle des petits cotés, par exemple, deux fois supérieure, pour le cas où l'on souhaite un plus faible éclairement de la route.On the contrary, it is also possible to reduce the marking on the ground by proposing a rectangle whose length of the long sides is slightly greater than that of small sides, for example, two times greater, in case we want a lower illumination of the road.

Avantageusement, l'image du faisceau projetée par la lentille présente une largeur comprise entre de 1 à 5 %, c'est-à-dire que l'image du faisceau projetée par la lentille sur un mur situé à 100 mètres de la torche présente une largeur de 1 mètre à 5 mètres sur le mur.Advantageously, the image of the beam projected by the lens has a width of between 1 to 5%, that is to say that the image of the beam projected by the lens on a wall located 100 meters from the present torch. a width of 1 meter to 5 meters on the wall.

A titre d'exemple pour une cible situé à 50 mètres cela permet d'avoir un éclairement sur 0,5 à 2,5 mètres de large, ce qui est suffisant pour marquer un obstacle sur le bord de la route, notamment un piéton.As an example for a target located at 50 meters it allows to have an illumination on 0.5 to 2.5 meters wide, which is enough to mark an obstacle on the edge of the road, including a pedestrian.

Pour permettre cette rotation, le support de lentille 7 est monté libre en rotation sur le module d'éclairage 8 entre deux liaisons 11, 12. La torche de l'invention présente ainsi une première liaison rotative 11 entre le support de lentille 7 et le module d'éclairage 8, qui est située au-dessus de la lentille selon le deuxième axe Z et une deuxième liaison rotative 12 entre le support de lentille 7 et le module d'éclairage 8, qui est située en dessous de la lentille selon le deuxième axe Z. La première liaison 11, la deuxième liaison 12 et l'axe optique de la lentille 6 sont alignés selon le deuxième axe Z.To enable this rotation, the lens support 7 is rotatably mounted on the lighting module 8 between two links 11, 12. The torch of the invention thus has a first rotatable connection 11 between the lens support 7 and the lighting module 8, which is situated above the lens along the second axis Z and a second rotary connection 12 between the lens support 7 and the lighting module 8, which is located below the lens according to the second axis Z. The first link 11, the second link 12 and the optical axis of the lens 6 are aligned along the second axis Z.

Le troisième axe Y, notamment perpendiculaire au premier axe X et au deuxième axe Z, définit, avec l'axe X, l'horizontale.The third axis Y, in particular perpendicular to the first axis X and the second axis Z, defines, with the axis X, the horizontal.

La première liaison 11 est formée ici d'une excroissance 13 du module d'éclairage 8 et d'un pion 14 du support de lentille 7 inséré dans l'excroissance 13.The first link 11 is formed here of an outgrowth 13 of the lighting module 8 and a pin 14 of the lens support 7 inserted into the protrusion 13.

La deuxième liaison 12 est formée notamment d'un pion du support de lentille 7 et d'un orifice situé sur la base 9 du module d'éclairage 8.The second link 12 is formed in particular of a pin of the lens support 7 and of an orifice situated on the base 9 of the lighting module 8.

Le pion de la première liaison 11 et celui de la deuxième liaison 12 sont alignés selon le deuxième axe Z et permettent ainsi à la lentille 6 de tourner autour de cet axe.The pin of the first link 11 and that of the second link 12 are aligned along the second axis Z and thus allow the lens 6 to rotate about this axis.

Les figures 1 et 2 représentent le cas où la lentille est centrée par rapport à la torche, c'est-à-dire le cas où le faisceau sortant de la lentille est dirigé droit devant le véhicule. Les figures 3a et 3b représentent les cas dans lesquels l'actionneur a déplacé en rotation la lentille 6, notamment pour suivre un obstacle. Dans un tel cas, le faisceau est légèrement déformé, mais la lumière parasite qui en résulte et qui se développe principalement à ses extrémités hautes et basses, ne pose ici pas de problème puisqu'elle ne peut pas éblouir les passagers des véhicules circulant en sens inverse.The figures 1 and 2 represent the case where the lens is centered with respect to the torch, that is to say the case where the beam coming out of the lens is directed straight ahead of the vehicle. The Figures 3a and 3b represent the cases in which the actuator has rotated the lens 6, in particular to follow an obstacle. In such a case, the beam is slightly deformed, but the resulting stray light, which develops mainly at its high and low ends, does not pose a problem here since it can not dazzle the passengers of the vehicles traveling in the direction reverse.

La torche 2 de l'invention peut être contrôlée par un système d'aide à la conduite. Un tel système d'aide à la conduite comprend des moyens de détection d'image comprenant au moins un capteur qui collecte des informations relatives à l'environnement dans lequel le véhicule se déplace. Ce capteur est notamment une caméra infrarouge dirigée selon la direction de déplacement du véhicule pour couvrir une distance pouvant aller jusqu'à plusieurs centaines de mètres devant le véhicule.The torch 2 of the invention can be controlled by a driver assistance system. Such a driver assistance system comprises image detection means comprising at least one sensor which collects information relating to the environment in which the vehicle is traveling. This sensor is in particular an infrared camera directed according to the direction of movement of the vehicle to cover a distance of up to several hundred meters in front of the vehicle.

Les moyens de détection fournissent en sortie au moins un signal comprenant des données de l'image détectée à des moyens de traitement d'image.The detection means output at least one signal comprising data of the detected image to image processing means.

Les moyens de traitement d'image comprennent ici un processeur vidéo en temps réel agencé pour traiter rapidement, par exemple en moins d'un dixième de seconde, les données d'image collectées par les moyens de détection. Ce processeur est en outre capable d'identifier différents types d'objets sur la route, de discriminer entre les objets stationnaires et les objets en mouvement et de calculer les trajectoires de ces derniers.The image processing means here comprise a real-time video processor arranged to process rapidly, for example in less than one tenth of a second, the image data collected by the detection means. This processor is also able to identify different types of objects on the road, to discriminate between stationary objects and moving objects and to calculate the trajectories of these objects.

Ainsi, lorsque les moyens de traitement d'image identifient un obstacle, tel un animal ou un piéton, en mouvement sur la route ou au voisinage de la route, ils calculent sa trajectoire et fournissent sa position en temps réel à des moyens de commande de l'ensemble d'actionnement de la torche 2 afin de positionner le faisceau lumineux produit par la source 4 de manière appropriée pour éclairer l'obstacle.Thus, when the image processing means identify an obstacle, such as an animal or a pedestrian, moving on the road or in the vicinity of the road, they calculate its trajectory and provide its position in real time to means of controlling the actuating assembly of the torch 2 to position the light beam produced by the source 4 as appropriate to illuminate the obstacle.

Ensuite, selon le mouvement de l'obstacle et du véhicule, les moyens de commande commandent le moteur de l'ensemble d'actionnement pour entraîner la lentille 6 en rotation.Then, according to the movement of the obstacle and the vehicle, the control means controls the motor of the actuating assembly for driving the lens 6 in rotation.

Bien entendu, d'autres modes de réalisation encore peuvent être envisagés.Of course, other embodiments may be envisaged.

Ainsi, la torche de l'invention peut former un projecteur séparé à part entière, notamment dédié à la poursuite d'obstacles. Elle peut également faire partie d'un projecteur existant, notamment un projecteur antibrouillard.Thus, the torch of the invention can form a separate projector in its own right, in particular dedicated to the tracking of obstacles. It can also be part of an existing projector, including a fog lamp.

Claims (12)

Torche d'éclairage (2) pour véhicule automobile comportant une source lumineuse (4) produisant un faisceau lumineux dirigé selon un premier axe (X) destiné à être orienté vers l'avant du véhicule, ladite torche comprenant une lentille (6), caractérisée par le fait que ladite source lumineuse (4) projette l'ensemble du faisceau directement sur la lentille (6), sans réflexion ni obturation, ladite lentille (6) étant agencée pour se déplacer en rotation autour d'un deuxième axe (Z) destiné à être orienté vers le haut du véhicule.Lighting torch (2) for a motor vehicle having a light source (4) producing a light beam directed along a first axis (X) intended to be oriented towards the front of the vehicle, said torch comprising a lens (6), characterized in that said light source (4) projects the entire beam directly onto the lens (6), without reflection or closure, said lens (6) being arranged to move in rotation about a second axis (Z) intended to be oriented towards the top of the vehicle. Torche d'éclairage (2) selon la revendication 1, dans laquelle ledit faisceau lumineux est de forme sensiblement allongée selon le deuxième axe (Z).A lighting torch (2) according to claim 1, wherein said light beam is substantially elongate in shape along the second axis (Z). Torche d'éclairage (2) selon la revendication 2, dans laquelle le faisceau lumineux est projeté par la lentille (6) et forme une image s'inscrivant dans un rectangle dans un plan perpendiculaire au premier axe (X), les grands cotés du rectangle s'étendant selon le deuxième axe (Z) et les petits cotés du rectangle s'étendant selon un troisième axe (Y) perpendiculaire au premier axe (X) et au deuxième axe (Z).Lighting torch (2) according to claim 2, wherein the light beam is projected by the lens (6) and forms an image forming a rectangle in a plane perpendicular to the first axis (X), the long sides of the rectangle extending along the second axis (Z) and the small sides of the rectangle extending along a third axis (Y) perpendicular to the first axis (X) and the second axis (Z). Torche d'éclairage (2) selon la revendication 3, dans laquelle la longueur des grands cotés est 2 à 10 fois supérieure à la longueur des petits cotés.A lighting torch (2) according to claim 3, wherein the length of the long sides is 2 to 10 times greater than the length of the short sides. Torche d'éclairage (2) selon l'une des revendications 2 à 4, dans laquelle le faisceau lumineux est projeté par la lentille (6) et forme une image projetée à une longueur donnée de la torche d'éclairage (2) mesurée selon le premier axe (X), l'image présentant une largeur mesurée selon un troisième axe (Y) perpendiculaire au premier axe (X) et au deuxième axe (Z), qui est comprise entre 1 et 5% de ladite longueur.Lighting torch (2) according to one of claims 2 to 4, wherein the light beam is projected by the lens (6) and forms an image projected at a given length of the lighting torch (2) measured according to the first axis (X), the image having a width measured along a third axis (Y) perpendicular to the first axis (X) and the second axis (Z), which is between 1 and 5% of said length. Torche d'éclairage (2) selon l'une quelconque des revendications précédentes, dans laquelle la source lumineuse (4) comprend au moins une diode électroluminescente.A lighting torch (2) according to any one of the preceding claims, wherein the light source (4) comprises at least one light emitting diode. Torche d'éclairage (2) selon la revendication 6, dans laquelle la source lumineuse (4) comprend une série de diodes électroluminescentes, disposées linéairement selon le deuxième axe (Z).A lighting torch (2) according to claim 6, wherein the light source (4) comprises a series of light-emitting diodes arranged linearly along the second axis (Z). Torche d'éclairage (2) selon l'une quelconque des revendications précédentes, comprenant un module d'éclairage (8) sur lequel est positionnée la source lumineuse (4).Lighting torch (2) according to any one of the preceding claims, comprising a lighting module (8) on which is positioned the light source (4). Torche d'éclairage (2) selon la revendication 8, dans laquelle la lentille (6) est montée sur le module d'éclairage (8) par l'intermédiaire d'au moins une liaison (11, 12) autorisant la rotation de la lentille (6) par rapport au module d'éclairage (8) selon le deuxième axe Z.Lighting torch (2) according to claim 8, wherein the lens (6) is mounted on the lighting module (8) via at least one connection (11, 12) allowing the rotation of the lens (6) relative to the lighting module (8) along the second axis Z. Torche d'éclairage (2) selon l'une quelconque des revendications précédentes, comprenant un actionneur agencé pour faire tourner ladite lentille (6) autour du deuxième axe (Z).A lighting torch (2) according to any one of the preceding claims, comprising an actuator arranged to rotate said lens (6) about the second axis (Z). Projecteur pour véhicule automobile comprenant une torche d'éclairage (2) selon l'une quelconque des revendications précédentes.Motor vehicle headlamp comprising a lighting torch (2) according to any one of the preceding claims. Véhicule automobile comprenant une torche d'éclairage (2) selon l'une quelconque des revendications 1 à 10.Motor vehicle comprising a lighting torch (2) according to any one of claims 1 to 10.
EP14151123.8A 2013-01-14 2014-01-14 Lighting flare for a motor vehicle Active EP2754950B1 (en)

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US20140198514A1 (en) 2014-07-17
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CN103925541A (en) 2014-07-16
FR3001028A1 (en) 2014-07-18
FR3001028B1 (en) 2018-05-04
JP2014135281A (en) 2014-07-24
US9657911B2 (en) 2017-05-23

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