EP2527724A2 - Headlight for automobile - Google Patents

Headlight for automobile Download PDF

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Publication number
EP2527724A2
EP2527724A2 EP12169383A EP12169383A EP2527724A2 EP 2527724 A2 EP2527724 A2 EP 2527724A2 EP 12169383 A EP12169383 A EP 12169383A EP 12169383 A EP12169383 A EP 12169383A EP 2527724 A2 EP2527724 A2 EP 2527724A2
Authority
EP
European Patent Office
Prior art keywords
projector
bar
light beam
motor
support
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
EP12169383A
Other languages
German (de)
French (fr)
Other versions
EP2527724B1 (en
EP2527724A3 (en
Inventor
Cyril Rivier
Hassan Koulouh
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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Publication date
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Publication of EP2527724A2 publication Critical patent/EP2527724A2/en
Publication of EP2527724A3 publication Critical patent/EP2527724A3/en
Application granted granted Critical
Publication of EP2527724B1 publication Critical patent/EP2527724B1/en
Active legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/698—Shaft-shaped screens rotating along its longitudinal axis

Definitions

  • the present invention relates to a projector for a motor vehicle.
  • the invention relates to the field of motor vehicle headlamps of the type comprising a reflector in which are disposed a light source producing a light beam and deformation means of the light beam to suit the circumstances of the pipe.
  • the cutoff bar can adopt more than two angular positions to selectively obscure the light beam.
  • Such strips are actuated electrically by an actuator comprising an electric motor and a detector of the angular position of the cut-off bar.
  • a detector frequently used to detect the angular position of the bar is the Hall effect sensor comprising a sensor and magnet.
  • the magnet is disposed on a magnet hub located at the bar.
  • the motor is connected to a first printed circuit board and the sensor is connected to a second printed circuit board.
  • This arrangement has a size detrimental to the integration of the actuator in any reflector.
  • the invention aims to improve the situation.
  • the projector of the invention is characterized in that the motor and the sensor are mounted on a single electronic circuit support.
  • the actuator of the invention is more compact than the actuators of the state of the art. This makes it possible to integrate it on any reflector, thus making it universal.
  • the angular position detector is a Hall effect detector.
  • the detector comprises a sensor and a magnet disposed on the bar.
  • the electric motor is a stepper motor.
  • This motor makes it possible to have a high precision of the rotational movement of the bar caused by this motor.
  • the support is a printed circuit board, preferably located on the motor and on which the sensor can advantageously be mounted.
  • the sensor can advantageously be mounted.
  • said actuator comprises an electrical connector located at a portion of the projector centered with respect to the light beam, said central portion.
  • said actuator comprises an electrical connector located at a portion of the projector centered with respect to the light beam, said central portion.
  • said actuator comprises an electrical connector located at a portion of the projector centered with respect to the light beam, said central portion.
  • the electronic circuit support extends longitudinally substantially perpendicular to the light beam. In this way, the size of the actuator is reduced.
  • the electronic circuit support extends at least at a portion of the projector centered with respect to the light beam, said central portion.
  • the connector can be arranged directly on the electronic circuit support so as to reduce the size of the actuator.
  • the actuator comprises a temperature sensor connected to the support.
  • the temperature sensor is, in particular, connected to the electrical connector. This temperature sensor makes it possible, in particular, to measure the temperature inside the headlamp and to control the engine, for example, when this temperature exceeds a threshold, in order to adapt the operation of the engine and thus prevent it from occurring. warms up too much.
  • the reflector is of elliptical type.
  • This elliptical shape has the advantage of concentrating a lot of light with a low reflector height which improves the compactness of the projector.
  • the light source is a xenon lamp or a halogen lamp or a light emitting diode lamp.
  • the invention also relates to an electric actuator of a cut-off bar of a projector according to the invention, comprising an electric motor and an angular position detector of the bar, characterized in that the motor and the position detector are connected to a single electronic circuit support.
  • the invention also relates to a motor vehicle equipped with a projector according to the invention.
  • the figure 1 represents an embodiment of the projector 2 for a motor vehicle according to the invention.
  • the projector 2 comprises an elliptical reflector 4, a light source 6 and a lens 8.
  • a lens holder 10 ensures the attachment of the lens 8 to the reflector 4.
  • the light source 6 is of any suitable type, for example a halogen lamp or a xenon lamp or a light emitting diode.
  • the light rays of the source 6 are emitted towards the lens 8 after reflection on the reflector 4. These rays then form a light beam.
  • the light beam produced is directed along a substantially horizontal optical axis and directed towards the front of the vehicle in order to optimally illuminate a route taken.
  • the optical axis defines the center of the light beam.
  • the projector 2 also comprises a cut-off bar 12 around an axis 14 substantially perpendicular to the optical axis.
  • a cutoff bar is a cover intended to intercept at least partially, depending on its position, the light beam emitted by the source.
  • the shape of the bar defines the desired cut in the beam.
  • the cutoff bar 12 is mounted on a frame 16 integrated in the projector 2.
  • the cutoff bar 12 can take different angular positions, including at least one so-called optically active position, that is to say a position in which it hides a portion of the light beam, so that the projector 2 emits a beam "Cut", including a cross-type beam or anti-fog.
  • the bar 12 may have one or more active positions and a so-called passive position in which it does not obscure the light beam, thus allowing the projector 2 to emit an uninterrupted light beam of the "fire" road type.
  • the bar 12 shown here comprises an oblique edge 19 making it possible to obtain an oblique cutoff for the emission of a code beam.
  • An actuator represented on the figure 2 , makes it possible to drive the cut-off bar 12 in rotation from an active position to a passive position, with several possible active positions.
  • This actuator comprises an electric stepper motor 20 mounted on the frame 16.
  • the use of a stepper motor allows a great flexibility of driving the bar 12 from one position to another, this which is advantageous when the projector 2 is of multi-function type.
  • the motor 20 rotates a motor shaft 21 supporting a pinion 22.
  • the pinion 22 then drives the bar 12 by means of a transmission gear 24 located at one end of the bar 12.
  • the actuator also comprises a Hall effect detector comprising a sensor 26 and a magnet 28 mounted on the toothed wheel 24, for accurately detecting the angular position of the bar 12 relative to a reference angle.
  • the magnet 28 can be replaced by a metal element or by any other magnetic element.
  • the sensor 26 determines a magnetic field variation due to the displacement of the magnet 28. It deduces the angular position of the magnet 28 and therefore that of the bar 12.
  • a printed circuit support 30 is located on the motor 20. This support 30 makes it possible to control the operation of the motor 20 by knowing the angular position of the bar 12 detected by the sensor 26.
  • the senor 26 is mounted on the support 30 located on the motor 20.
  • the motor 20 and the sensor 26 are thus connected to a single electronic circuit support 30.
  • the motor 20 is, in particular, welded to the support 30 The direct contact between the motor 20 and the support 30 thus makes it possible to reduce the size of the actuator.
  • the support may be a housing or a card as shown in the figure 2 .
  • the support 30 extends longitudinally perpendicular to the beam, that is to say perpendicularly to the optical axis. It extends in particular at a portion of the projector centered with respect to the light beam, said central portion.
  • the support 30 extends here from a lateral side of the projector to the central portion.
  • the central portion is included inside the frame 16. It is defined, in a plane perpendicular to the beam, as extending in a direction, said first direction, parallel to a direction of longitudinal extension of the cutoff bar 12 and around a axis, said vertical axis, perpendicular to the previous direction and passing through the optical axis.
  • the vertical axis passes through the central part. Its extension in the first direction is preferably between 30% and 50% of the length of the frame 16 measured in the direction of longitudinal extension of the cutoff bar.
  • the central portion is located, in particular, below the optical axis of the projector.
  • the sensor 26 is located opposite the magnet 28. It is located on the support 30 and extends in particular perpendicularly to the support 30. It is located at the lateral side of the projector from which extends the support 30.
  • the mounting of the sensor 26 on the support 30 makes it possible to overcome the length of the bar 12 and to arrange the assembly of the actuator on the same side of the reflector 4. In this way, the space requirement of the actuator and therefore the projector.
  • the actuator also comprises an electrical connector 31.
  • This electrical connector 31 is, for example, carried by the support 30 and, in particular, connected thereto. It can also be carried by the motor 20. This particular arrangement allows, here again, a gain in size of the actuator.
  • the figure 3 schematically illustrates the electrical connections of the support and associated connector 31, for example.
  • the connector 31 comprises 8 connection channels.
  • a first channel 32 is intended to be connected to ground.
  • Two input channels 34, 36 are intended to be connected to the sensor 26.
  • a third input channel 38 is also provided to be connected to a not shown temperature sensor.
  • the support 30 extends at least at the central portion, it is possible, thanks to the invention, to have the electrical connector 31 in this central portion.
  • the electrical connector 31 extends perpendicular to the plane in which the support 30 extends.
  • Connecting wires serving, in particular, for connection to the motor 20, fit into the connector 31 and are thus oriented perpendicular to the plane in which the support 30 extends.
  • the projector may be rotatably mounted about a vertical axis, i.e., perpendicular to the extension of the cutoff bar 12 and the optical axis. Because of the central position of the electrical connector 31 and its orientation, the connecting son are oriented perpendicular to the axis of rotation of the projector and centrally with respect thereto. The rotation of the headlamp is then facilitated by the fact that the connecting threads do not exert any constraint hindering this rotation. This avoids, for example, that a rotation of the projector causes a disconnection of the connection son.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The headlight has an elliptical reflector in which a light source e.g. LED lamp, is arranged to produce a light beam. A light beam deformation unit comprises a disconnecting strip (12) moving between a position in which the strip does not intercept the beam and another position in which the strip intercepts a portion of the beam. An electric actuator of the strip includes a step-by-step electric motor (20) and a detector e.g. Hall effect detector, to detect angular position of the strip by using a sensor (26). The motor and the sensor are mounted on a single printed circuit support (30).

Description

La présente invention se rapporte à un projecteur pour véhicule automobile.The present invention relates to a projector for a motor vehicle.

Plus particulièrement, l'invention concerne le domaine des projecteurs pour véhicule automobile du type comprenant un réflecteur dans lequel sont disposés une source lumineuse produisant un faisceau lumineux et des moyens de déformation du faisceau lumineux pour l'adapter aux circonstances de la conduite.More particularly, the invention relates to the field of motor vehicle headlamps of the type comprising a reflector in which are disposed a light source producing a light beam and deformation means of the light beam to suit the circumstances of the pipe.

II est connu d'utiliser une barrette de coupure rotative actionnée électriquement pour se déplacer, sur commande, d'une première position angulaire dans laquelle elle occulte une partie du faisceau lumineux afin de limiter la portée du projecteur à celle des feux de croisement pour ne pas éblouir les autres conducteurs circulant en sens inverse, à une deuxième position angulaire dans laquelle elle n'occulte pas le faisceau lumineux, la portée du projecteur correspondant alors à celle des feux de route.It is known to use an electrically actuated rotary cut-off bar to move, on command, a first angular position in which it obscures a portion of the light beam in order to limit the range of the headlamp to that of the dipped headlamps in order to not dazzle the other drivers traveling in the opposite direction, to a second angular position in which it does not hide the light beam, the range of the projector corresponding to that of high beam.

II existe également des projecteurs dits multi-fonctions, dans lesquels la barrette de coupure peut adopter plus de deux positions angulaires pour occulter de façon sélective le faisceau lumineux.There are also so-called multi-function projectors, in which the cutoff bar can adopt more than two angular positions to selectively obscure the light beam.

De telles barrettes sont actionnées électriquement par un actionneur comprenant un moteur électrique et un détecteur de la position angulaire de la barrette de coupure.Such strips are actuated electrically by an actuator comprising an electric motor and a detector of the angular position of the cut-off bar.

Un détecteur fréquemment utilisé pour détecter la position angulaire de la barrette est le détecteur à effet Hall comprenant un capteur et aimant.A detector frequently used to detect the angular position of the bar is the Hall effect sensor comprising a sensor and magnet.

Dans les projecteurs de l'état de la technique, l'aimant est disposé sur un moyeu porte-aimant situé au niveau de la barrette. En outre, le moteur est raccordé à une première carte de circuit imprimé et le capteur est raccordé à une deuxième carte de circuit imprimé.In the projectors of the state of the art, the magnet is disposed on a magnet hub located at the bar. In addition, the motor is connected to a first printed circuit board and the sensor is connected to a second printed circuit board.

Cet agencement présente un encombrement préjudiciable à l'intégration de l'actionneur dans tout réflecteur.This arrangement has a size detrimental to the integration of the actuator in any reflector.

L'invention vise à améliorer la situation.The invention aims to improve the situation.

La présente invention concerne tout d'abord un projecteur pour véhicule automobile comprenant un réflecteur dans lequel sont disposés une source lumineuse produisant un faisceau lumineux et des moyens de déformation du faisceau lumineux, lesdits moyens de déformation comprenant :

  • une barrette de coupure rotative pouvant se déplacer entre au moins une première position dans laquelle elle n'intercepte pas le faisceau lumineux et une deuxième position dans laquelle elle intercepte au moins une partie du faisceau lumineux ; et
  • un actionneur électrique de la barrette de coupure comprenant un moteur électrique et un détecteur de la position angulaire de la barrette à l'aide d'un capteur.
The present invention firstly relates to a motor vehicle headlight comprising a reflector in which are disposed a light source producing a light beam and deformation means of the light beam, said deformation means comprising:
  • a rotary cutoff bar movable between at least a first position in which it does not intercept the light beam and a second position in which it intercepts at least a portion of the light beam; and
  • an electric actuator of the cut-off bar comprising an electric motor and a detector of the angular position of the bar by means of a sensor.

Le projecteur de l'invention est caractérisé par le fait que le moteur et le capteur sont montés sur un unique support de circuit électronique.The projector of the invention is characterized in that the motor and the sensor are mounted on a single electronic circuit support.

De manière remarquable, grâce à la connexion du moteur et du détecteur de position sur un même support, l'actionneur de l'invention est plus compact que les actionneurs de l'état de la technique. Cela permet de l'intégrer sur tout réflecteur, le rendant ainsi universel.Remarkably, thanks to the connection of the motor and the position detector on the same support, the actuator of the invention is more compact than the actuators of the state of the art. This makes it possible to integrate it on any reflector, thus making it universal.

Selon une réalisation préférée, le détecteur de position angulaire est un détecteur à effet Hall.In a preferred embodiment, the angular position detector is a Hall effect detector.

L'utilisation d'un détecteur à effet Hall permet de connaître précisément, à chaque instant, un angle de rotation de la barrette par rapport à un angle de référence.The use of a Hall effect detector makes it possible to precisely know, at each instant, an angle of rotation of the bar with respect to a reference angle.

Avantageusement, le détecteur comprend un capteur et un aimant disposé sur la barrette.Advantageously, the detector comprises a sensor and a magnet disposed on the bar.

Contrairement aux actionneurs de l'état de la technique, il n'est pas nécessaire de prévoir un moyeu porte-aimant. Cela permet d'améliorer encore le gain de place dans le projecteur de l'invention.Unlike actuators of the state of the art, it is not necessary to provide a hub magnet. This further improves the space saving in the projector of the invention.

De préférence, le moteur électrique est un moteur pas-à-pas.Preferably, the electric motor is a stepper motor.

Ce moteur permet d'avoir une grande précision du mouvement de rotation de la barrette provoqué par ce moteur.This motor makes it possible to have a high precision of the rotational movement of the bar caused by this motor.

Avantageusement, le support est une carte de circuit imprimé, de préférence située sur le moteur et sur laquelle le capteur peut avantageusement être monté. Ainsi, non seulement on peut s'affranchir de la longueur de la barrette mais on peut disposer l'ensemble de l'actionneur d'un même côté du réflecteur.Advantageously, the support is a printed circuit board, preferably located on the motor and on which the sensor can advantageously be mounted. Thus, not only can we overcome the length of the bar, but we can have the entire actuator on the same side of the reflector.

De préférence, ledit actionneur comprend un connecteur électrique situé au niveau d'une partie du projecteur centrée par rapport au faisceau lumineux, dite partie centrale. De cette manière, il est possible de raccorder des fils raccord au connecteur électrique au centre du faisceau et donc au centre du projecteur. Ces fils ne gêneront donc pas une rotation horizontale du projecteur, en particulier une rotation selon un axe centré par rapport au faisceau et perpendiculaire au plan horizontal défini par la direction d'extension de la barrette de coupure et une direction d'extension du faisceau. La rotation du projecteur selon cet axe ne risque alors pas de débrancher les fils raccord du connecteur électrique.Preferably, said actuator comprises an electrical connector located at a portion of the projector centered with respect to the light beam, said central portion. In this way, it is possible to connect connecting wires to the electrical connector in the center of the beam and therefore in the center of the projector. These wires will not interfere with a horizontal rotation of the projector, in particular a rotation along an axis centered with respect to the beam and perpendicular to the horizontal plane defined by the direction of extension of the cutoff bar and a direction of extension of the beam. The rotation of the projector along this axis is then not likely to disconnect the connection son of the electrical connector.

De préférence, le support de circuit électronique s'étend longitudinalement de manière sensiblement perpendiculaire au faisceau lumineux. De cette manière, on réduit l'encombrement de l'actionneur.Preferably, the electronic circuit support extends longitudinally substantially perpendicular to the light beam. In this way, the size of the actuator is reduced.

Avantageusement, le support de circuit électronique s'étend au moins au niveau d'une partie du projecteur centrée par rapport au faisceau lumineux, dite partie centrale. De cette façon, on peut disposer le connecteur directement sur le support de circuit électronique de manière à réduire l'encombrement de l'actionneur.Advantageously, the electronic circuit support extends at least at a portion of the projector centered with respect to the light beam, said central portion. In this way, the connector can be arranged directly on the electronic circuit support so as to reduce the size of the actuator.

Selon une réalisation préférée, l'actionneur comprend un capteur de température raccordé au support. Le capteur de température est, notamment, raccordé au connecteur électrique. Ce capteur de température permet, notamment, de mesurer la température à l'intérieur du projecteur et de contrôler le moteur, par exemple, lorsque cette température dépasse un seuil, afin d'adapter le fonctionnement du moteur et éviter ainsi qu'il ne s'échauffe trop.In a preferred embodiment, the actuator comprises a temperature sensor connected to the support. The temperature sensor is, in particular, connected to the electrical connector. This temperature sensor makes it possible, in particular, to measure the temperature inside the headlamp and to control the engine, for example, when this temperature exceeds a threshold, in order to adapt the operation of the engine and thus prevent it from occurring. warms up too much.

De préférence, le réflecteur est de type elliptique.Preferably, the reflector is of elliptical type.

Cette forme elliptique présente l'avantage de concentrer beaucoup de lumière avec une faible hauteur de réflecteur ce qui améliore la compacité du projecteur.This elliptical shape has the advantage of concentrating a lot of light with a low reflector height which improves the compactness of the projector.

Avantageusement, la source lumineuse est une lampe xénon ou une lampe halogène ou une lampe à diode électroluminescente.Advantageously, the light source is a xenon lamp or a halogen lamp or a light emitting diode lamp.

L'invention concerne également un actionneur électrique d'une barrette de coupure d'un projecteur selon l'invention, comprenant un moteur électrique et un détecteur de position angulaire de la barrette, caractérisé par le fait que le moteur et le détecteur de position sont raccordés à un unique support de circuit électronique.The invention also relates to an electric actuator of a cut-off bar of a projector according to the invention, comprising an electric motor and an angular position detector of the bar, characterized in that the motor and the position detector are connected to a single electronic circuit support.

L'invention concerne aussi un véhicule automobile équipé d'un projecteur selon l'invention.The invention also relates to a motor vehicle equipped with a projector according to the invention.

Des modes de réalisation de l'invention vont maintenant être décrits de façon plus précise mais non limitative en regard du dessin annexé sur lequel :

  • la figure 1 est une vue en perspective représentant un projecteur selon un mode de réalisation de l'invention ;
  • la figure 2 est une vue en perspective représentant la structure d'un actionneur d'une barrette de coupure pour un projecteur selon un mode de réalisation de l'invention ; et
  • la figure 3 est un schéma représentant un exemple de connexion électrique de l'actionneur de la figure 2.
Embodiments of the invention will now be described in a more precise but nonlimiting manner with reference to the appended drawing in which:
  • the figure 1 is a perspective view showing a projector according to an embodiment of the invention;
  • the figure 2 is a perspective view showing the structure of an actuator of a cut-off bar for a projector according to an embodiment of the invention; and
  • the figure 3 is a diagram showing an example of electrical connection of the actuator of the figure 2 .

La figure 1 représente une forme de réalisation du projecteur 2 pour véhicule automobile selon l'invention.The figure 1 represents an embodiment of the projector 2 for a motor vehicle according to the invention.

Le projecteur 2 comprend un réflecteur elliptique 4, une source lumineuse 6 et une lentille 8. Un porte-lentille 10 assure la fixation de la lentille 8 au réflecteur 4.The projector 2 comprises an elliptical reflector 4, a light source 6 and a lens 8. A lens holder 10 ensures the attachment of the lens 8 to the reflector 4.

La source lumineuse 6 est de tout type approprié, par exemple une lampe halogène ou une lampe xénon ou encore une diode électroluminescente. Les rayons lumineux de la source 6 sont émis en direction de la lentille 8 après réflexion sur le réflecteur 4. Ces rayons forment alors un faisceau lumineux.The light source 6 is of any suitable type, for example a halogen lamp or a xenon lamp or a light emitting diode. The light rays of the source 6 are emitted towards the lens 8 after reflection on the reflector 4. These rays then form a light beam.

Le faisceau lumineux produit est dirigé selon un axe optique sensiblement horizontal et dirigé vers l'avant du véhicule afin d'éclairer de manière optimale une route empruntée. L'axe optique définit le centre du faisceau lumineux.The light beam produced is directed along a substantially horizontal optical axis and directed towards the front of the vehicle in order to optimally illuminate a route taken. The optical axis defines the center of the light beam.

Le projecteur 2 comprend également une barrette de coupure 12 rotative autour d'un axe 14 sensiblement perpendiculaire à l'axe optique.The projector 2 also comprises a cut-off bar 12 around an axis 14 substantially perpendicular to the optical axis.

Une barrette de coupure est un cache destiné à intercepter au moins partiellement, selon sa position, le faisceau lumineux émis par la source. La forme de la barrette permet de délimiter la coupure voulue dans le faisceau.A cutoff bar is a cover intended to intercept at least partially, depending on its position, the light beam emitted by the source. The shape of the bar defines the desired cut in the beam.

La barrette de coupure 12 est montée sur un cadre 16 intégré dans le projecteur 2.The cutoff bar 12 is mounted on a frame 16 integrated in the projector 2.

Sur commande, la barrette de coupure 12 peut prendre différentes positions angulaires, dont au moins une position dite active optiquement, c'est-à-dire une position dans laquelle elle occulte une partie du faisceau lumineux, pour que le projecteur 2 émette un faisceau « coupé », notamment un faisceau de type croisement ou anti-brouillard. La barrette 12 peut présenter une ou plusieurs positions actives et une position dite passive dans laquelle elle n'occulte pas le faisceau lumineux, permettant ainsi au projecteur 2 d'émettre un faisceau lumineux sans coupure du type « feu » de route.On command, the cutoff bar 12 can take different angular positions, including at least one so-called optically active position, that is to say a position in which it hides a portion of the light beam, so that the projector 2 emits a beam "Cut", including a cross-type beam or anti-fog. The bar 12 may have one or more active positions and a so-called passive position in which it does not obscure the light beam, thus allowing the projector 2 to emit an uninterrupted light beam of the "fire" road type.

La barrette 12 représentée ici comprend un bord 19 oblique permettant d'obtenir une coupure oblique pour l'émission d'un faisceau code.The bar 12 shown here comprises an oblique edge 19 making it possible to obtain an oblique cutoff for the emission of a code beam.

Un actionneur, représenté sur la figure 2, permet d'entraîner la barrette de coupure 12 en rotation d'une position active à une position passive, avec plusieurs positions actives possibles.An actuator, represented on the figure 2 , makes it possible to drive the cut-off bar 12 in rotation from an active position to a passive position, with several possible active positions.

Cet actionneur comprend un moteur électrique pas-à-pas 20 monté sur le cadre 16. L'utilisation d'un moteur pas-à-pas permet une grande flexibilité d'entraînement de la barrette 12 d'une position à une autre, ce qui est avantageux lorsque le projecteur 2 est de type multi-fonctions.This actuator comprises an electric stepper motor 20 mounted on the frame 16. The use of a stepper motor allows a great flexibility of driving the bar 12 from one position to another, this which is advantageous when the projector 2 is of multi-function type.

Le moteur 20 entraîne en rotation un arbre moteur 21 supportant un pignon 22. Le pignon 22 entraîne alors la barrette 12 par l'intermédiaire d'une roue dentée 24 de transmission située à une extrémité de la barrette 12.The motor 20 rotates a motor shaft 21 supporting a pinion 22. The pinion 22 then drives the bar 12 by means of a transmission gear 24 located at one end of the bar 12.

L'actionneur comprend également un détecteur à effet Hall comportant un capteur 26 et un aimant 28 monté sur la roue dentée 24, permettant de détecter précisément la position angulaire de la barrette 12 par rapport à un angle de référence. L'aimant 28 peut être remplacé par un élément métallique ou par tout autre élément magnétique. Lors de la rotation de la barrette 12, le capteur 26 détermine une variation de champ magnétique due au déplacement de l'aimant 28. II en déduit la position angulaire de l'aimant 28 et donc celle de la barrette 12.The actuator also comprises a Hall effect detector comprising a sensor 26 and a magnet 28 mounted on the toothed wheel 24, for accurately detecting the angular position of the bar 12 relative to a reference angle. The magnet 28 can be replaced by a metal element or by any other magnetic element. During the rotation of the bar 12, the sensor 26 determines a magnetic field variation due to the displacement of the magnet 28. It deduces the angular position of the magnet 28 and therefore that of the bar 12.

Un support de circuit imprimé 30 est situé sur le moteur 20. Ce support 30 permet de commander le fonctionnement du moteur 20 en connaissant la position angulaire de la barrette 12 détectée par le capteur 26.A printed circuit support 30 is located on the motor 20. This support 30 makes it possible to control the operation of the motor 20 by knowing the angular position of the bar 12 detected by the sensor 26.

De manière remarquable, le capteur 26 est monté sur le support 30 situé sur le moteur 20. Le moteur 20 et le capteur 26 sont ainsi raccordés à un unique support de circuit électronique 30. Le moteur 20 est, notamment, soudé sur le support 30. Le contact direct entre le moteur 20 et le support 30 permet ainsi de réduire l'encombrement de l'actionneur.Remarkably, the sensor 26 is mounted on the support 30 located on the motor 20. The motor 20 and the sensor 26 are thus connected to a single electronic circuit support 30. The motor 20 is, in particular, welded to the support 30 The direct contact between the motor 20 and the support 30 thus makes it possible to reduce the size of the actuator.

On notera que le support peut être un boîtier ou une carte comme représenté sur la figure 2. Le support 30 s'étend longitudinalement de manière perpendiculaire au faisceau, c'est-à-dire de manière perpendiculaire à l'axe optique. II s'étend en particulier au niveau d'une partie du projecteur centrée par rapport au faisceau lumineux, dite partie centrale. Le support 30 s'étend ici depuis un coté latéral du projecteur jusqu'à la partie centrale. Tel que représentée, la partie centrale est comprise à l'intérieur du cadre 16. Elle est définie, dans un plan perpendiculaire au faisceau, comme s'étendant selon une direction, dite première direction, parallèle à une direction d'extension longitudinale de la barrette de coupure 12 et autour d'un axe, dit axe vertical, perpendiculaire à la direction précédente et passant par l'axe optique. Autrement dit, l'axe vertical traverse la partie centrale. Son extension selon la première direction est préférentiellement comprise entre 30% et 50 % de la longueur du cadre 16 mesurée selon la direction d'extension longitudinale de la barrette de coupure. La partie centrale est située, notamment, en dessous de l'axe optique du projecteur.Note that the support may be a housing or a card as shown in the figure 2 . The support 30 extends longitudinally perpendicular to the beam, that is to say perpendicularly to the optical axis. It extends in particular at a portion of the projector centered with respect to the light beam, said central portion. The support 30 extends here from a lateral side of the projector to the central portion. As shown, the central portion is included inside the frame 16. It is defined, in a plane perpendicular to the beam, as extending in a direction, said first direction, parallel to a direction of longitudinal extension of the cutoff bar 12 and around a axis, said vertical axis, perpendicular to the previous direction and passing through the optical axis. In other words, the vertical axis passes through the central part. Its extension in the first direction is preferably between 30% and 50% of the length of the frame 16 measured in the direction of longitudinal extension of the cutoff bar. The central portion is located, in particular, below the optical axis of the projector.

Le capteur 26 est situé en vis-à-vis de l'aimant 28. II est situé sur le support 30 et s'étend notamment de manière perpendiculaire au support 30. II est situé au niveau du coté latéral du projecteur à partir duquel s'étend le support 30.The sensor 26 is located opposite the magnet 28. It is located on the support 30 and extends in particular perpendicularly to the support 30. It is located at the lateral side of the projector from which extends the support 30.

Le montage du capteur 26 sur le support 30 permet de s'affranchir de la longueur de la barrette 12 et de disposer l'ensemble de l'actionneur d'un même côté du réflecteur 4. De cette manière, on réduit l'encombrement de l'actionneur et donc du projecteur.The mounting of the sensor 26 on the support 30 makes it possible to overcome the length of the bar 12 and to arrange the assembly of the actuator on the same side of the reflector 4. In this way, the space requirement of the actuator and therefore the projector.

L'actionneur comprend également un connecteur électrique 31. Ce connecteur électrique 31 est, par exemple, porté par le support 30 et, notamment, raccordé à ce dernier. II peut également être porté par le moteur 20. Cette disposition particulière permet, là encore, un gain d'encombrement de l'actionneur.The actuator also comprises an electrical connector 31. This electrical connector 31 is, for example, carried by the support 30 and, in particular, connected thereto. It can also be carried by the motor 20. This particular arrangement allows, here again, a gain in size of the actuator.

La figure 3 illustre schématiquement les connexions électriques du support et du connecteur 31 associé, à titre d'exemple.The figure 3 schematically illustrates the electrical connections of the support and associated connector 31, for example.

Selon cet exemple, le connecteur 31 comprend 8 voies de connexion. Une première voie 32 est destinée à être raccordée à la masse.According to this example, the connector 31 comprises 8 connection channels. A first channel 32 is intended to be connected to ground.

Deux voies d'entrée 34, 36 sont destinées à être raccordées au capteur 26.Two input channels 34, 36 are intended to be connected to the sensor 26.

Une troisième voie d'entrée 38 est également prévue pour être raccordée à un capteur de température non représenté.A third input channel 38 is also provided to be connected to a not shown temperature sensor.

Quatre voies de sortie 40, 42, 44, 46 sont destinées à être raccordées au moteur 20 pour gérer son fonctionnement.Four output channels 40, 42, 44, 46 are intended to be connected to the motor 20 to manage its operation.

Du fait que le support 30 s'étend au moins au niveau de la partie centrale, il est possible, grâce à l'invention, de disposer le connecteur électrique 31 dans cette partie centrale.Since the support 30 extends at least at the central portion, it is possible, thanks to the invention, to have the electrical connector 31 in this central portion.

Tel que représenté, le connecteur électrique 31 s'étend de manière perpendiculaire au plan dans lequel s'étend le support 30. Des fils de raccord (non représentés) servant, notamment, de connexion au moteur 20, s'insèrent dans le connecteur 31 et sont ainsi orientés perpendiculairement au plan dans lequel s'étend le support 30.As shown, the electrical connector 31 extends perpendicular to the plane in which the support 30 extends. Connecting wires (not shown) serving, in particular, for connection to the motor 20, fit into the connector 31 and are thus oriented perpendicular to the plane in which the support 30 extends.

Le projecteur peut être monté rotatif autour d'un axe vertical, c'est-à-dire perpendiculaire à l'extension de la barrette de coupure 12 et à l'axe optique. Du fait de la position centrale du connecteur électrique 31 et de son orientation, les fils de raccord sont orientés perpendiculairement à l'axe de rotation du projecteur et de manière centrée par rapport à ce dernier. La rotation du projecteur est alors facilitée par le fait que les fils de raccord n'exercent pas de contrainte gênant cette rotation. On évite ainsi, par exemple, qu'une rotation du projecteur n'entraine une déconnection des fils de raccord.The projector may be rotatably mounted about a vertical axis, i.e., perpendicular to the extension of the cutoff bar 12 and the optical axis. Because of the central position of the electrical connector 31 and its orientation, the connecting son are oriented perpendicular to the axis of rotation of the projector and centrally with respect thereto. The rotation of the headlamp is then facilitated by the fact that the connecting threads do not exert any constraint hindering this rotation. This avoids, for example, that a rotation of the projector causes a disconnection of the connection son.

Bien entendu, d'autres modes de réalisation encore peuvent être envisagés, comme, par exemple un moteur à courant continu.Of course, other embodiments can be envisaged, such as, for example, a DC motor.

Claims (13)

Projecteur (2) pour véhicule automobile comprenant un réflecteur (4) dans lequel sont disposés une source lumineuse (6) produisant un faisceau lumineux et des moyens de déformation du faisceau lumineux, lesdits moyens de déformation comprenant : - une barrette de coupure (12) rotative pouvant se déplacer entre au moins une première position dans laquelle elle n'intercepte pas le faisceau lumineux et une deuxième position dans laquelle elle intercepte au moins une partie du faisceau lumineux ; et - un actionneur électrique de la barrette de coupure (12) comprenant un moteur électrique (20) et un détecteur de la position angulaire de la barrette à l'aide d'un capteur (26),
caractérisé par le fait que le moteur (20) et le capteur (26) sont montés sur un unique support de circuit électronique (30). Projector (2) for a motor vehicle comprising a reflector (4) in which are disposed a light source (6) producing a light beam and means for deformation of the light beam, said deformation means comprising: a rotary cut-off bar (12) able to move between at least a first position in which it does not intercept the light beam and a second position in which it intercepts at least a portion of the light beam; and an electric actuator of the cut-off bar (12) comprising an electric motor (20) and a detector of the angular position of the bar by means of a sensor (26),
characterized in that the motor (20) and the sensor (26) are mounted on a single electronic circuit support (30). Projecteur (2) selon la revendication 1, caractérisé par le fait que le détecteur de position angulaire est un détecteur à effet Hall (26,28).Projector (2) according to Claim 1, characterized in that the angular position detector is a Hall effect detector (26, 28). Projecteur (2) selon la revendication 2, caractérisé par le fait que le détecteur comprend un aimant (28) disposé sur la barrette (12).Projector (2) according to claim 2, characterized in that the detector comprises a magnet (28) disposed on the bar (12). Projecteur (2) selon l'une des revendications 1 à 3, caractérisé par le fait que le moteur électrique (20) est un moteur pas-à-pas.Projector (2) according to one of claims 1 to 3, characterized in that the electric motor (20) is a stepper motor. Projecteur (2) selon l'une des revendications 1 à 4, caractérisé par le fait que le support de circuit électronique (30) s'étend au moins au niveau d'une partie du projecteur (2) centrée par rapport au faisceau lumineux.Projector (2) according to one of claims 1 to 4, characterized in that the electronic circuit support (30) extends at least at a portion of the projector (2) centered with respect to the light beam. Projecteur (2) selon l'une des revendications 1 à 5, caractérisé par le fait que le support de circuit électronique (30) s'étend longitudinalement de manière sensiblement perpendiculaire au faisceau lumineux.Projector (2) according to one of claims 1 to 5, characterized in that the electronic circuit support (30) extends longitudinally substantially perpendicular to the light beam. Projecteur (2) selon l'une des revendications 1 à 6, caractérisé par le fait que ledit actionneur comprend un connecteur électrique (31) situé au niveau d'une partie du projecteur (2) centrée par rapport au faisceau lumineux.Projector (2) according to one of claims 1 to 6, characterized in that said actuator comprises an electrical connector (31) located at a portion of the projector (2) centered with respect to the light beam. Projecteur (2) selon l'une des revendications 1 à 7, caractérisé par le fait que le support est une carte de circuit imprimé (30).Projector (2) according to one of claims 1 to 7, characterized in that the support is a printed circuit board (30). Projecteur (2) selon l'une des revendications 1 à 8, caractérisé par le fait que l'actionneur comprend un capteur de température raccordé au support.Projector (2) according to one of claims 1 to 8, characterized in that the actuator comprises a temperature sensor connected to the support. Projecteur (2) selon l'une des revendications 1 à 9, caractérisé par le fait que le réflecteur (4) est de type elliptique.Projector (2) according to one of claims 1 to 9, characterized in that the reflector (4) is of elliptical type. Projecteur (2) selon l'une des revendications1 à 10, caractérisé par le fait que la source lumineuse (6) est une lampe xénon ou une lampe halogène ou une lampe à diode électroluminescente.Projector (2) according to one of claims 1 to 10, characterized in that the light source (6) is a xenon lamp or a halogen lamp or a light-emitting diode lamp. Actionneur électrique d'une barrette de coupure (12) d'un projecteur (2) selon l'une des revendications 1 à 11, comprenant un moteur électrique (20) et un détecteur de position angulaire de la barrette (12), caractérisé par le fait que le moteur (20) et le détecteur de position sont raccordés à un unique support de circuit électronique (30).Electric actuator of a cut-off bar (12) of a headlamp (2) according to one of claims 1 to 11, comprising an electric motor (20) and an angular position detector of the bar (12), characterized by the motor (20) and the position detector are connected to a single electronic circuit carrier (30). Véhicule automobile équipé d'un projecteur (2) selon l'une des revendications 1 à 11.Motor vehicle equipped with a headlamp (2) according to one of Claims 1 to 11.
EP12169383.2A 2011-05-25 2012-05-24 Headlight for automobile Active EP2527724B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1154568A FR2975646B1 (en) 2011-05-25 2011-05-25 PROJECTOR FOR MOTOR VEHICLE

Publications (3)

Publication Number Publication Date
EP2527724A2 true EP2527724A2 (en) 2012-11-28
EP2527724A3 EP2527724A3 (en) 2013-07-10
EP2527724B1 EP2527724B1 (en) 2020-11-18

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EP12169383.2A Active EP2527724B1 (en) 2011-05-25 2012-05-24 Headlight for automobile

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EP (1) EP2527724B1 (en)
FR (1) FR2975646B1 (en)

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CN108275065A (en) * 2017-01-05 2018-07-13 常州星宇车灯股份有限公司 A kind of adaptive front lamp light type switching module based on Hall sensor
CN109827142A (en) * 2018-07-02 2019-05-31 华域视觉科技(上海)有限公司 A kind of rotatably light modulation execution system and rotary light adjustment method

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CH696067A5 (en) * 2003-01-10 2006-12-15 Saia Burgess Murten Ag Actuator for vehicle headlights.
DE102006017132A1 (en) * 2006-04-12 2007-10-18 Hella Kgaa Hueck & Co. Headlight for vehicle, has diaphragm shaft coupled with electric motor by gearbox that has stepping gear such that shaft is adjustable successively between selectable rotating positions
DE102007050207A1 (en) * 2007-10-20 2009-04-23 Hella Kgaa Hueck & Co. Projection headlight for vehicle, has screen device with movable part adjustably arranged in horizontal direction, where device is brought from one operating position into another position by horizontal adjustment of movable part
ATE530849T1 (en) * 2008-02-08 2011-11-15 Hella Kgaa Hueck & Co PROJECTION HEADLIGHTS FOR VEHICLES
FR2936591B1 (en) * 2008-09-30 2014-09-12 Valeo Vision Sas OPTICAL MODULE FOR A MOTOR VEHICLE FOR SELECTIVELY LIGHTING A ZONE

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108275065A (en) * 2017-01-05 2018-07-13 常州星宇车灯股份有限公司 A kind of adaptive front lamp light type switching module based on Hall sensor
CN109827142A (en) * 2018-07-02 2019-05-31 华域视觉科技(上海)有限公司 A kind of rotatably light modulation execution system and rotary light adjustment method

Also Published As

Publication number Publication date
EP2527724B1 (en) 2020-11-18
FR2975646A1 (en) 2012-11-30
FR2975646B1 (en) 2015-06-26
EP2527724A3 (en) 2013-07-10

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