EP1197387A1 - Motor vehicle headlamp comprising an adjustable shade - Google Patents

Motor vehicle headlamp comprising an adjustable shade Download PDF

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Publication number
EP1197387A1
EP1197387A1 EP01402571A EP01402571A EP1197387A1 EP 1197387 A1 EP1197387 A1 EP 1197387A1 EP 01402571 A EP01402571 A EP 01402571A EP 01402571 A EP01402571 A EP 01402571A EP 1197387 A1 EP1197387 A1 EP 1197387A1
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EP
European Patent Office
Prior art keywords
axis
projector according
projector
screen
screens
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
EP01402571A
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German (de)
French (fr)
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EP1197387B1 (en
Inventor
Joel Leleve
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP1197387A1 publication Critical patent/EP1197387A1/en
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    • 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
    • F21S41/695—Screens rotating around a vertical axis

Definitions

  • the invention relates to vehicle headlights, in particular those fitted with an elliptical type reflector.
  • a projector of this type conventionally comprises a light source, an elliptical type reflector, a first focus of which is located near the source, a converging lens including a focal plane passes in the vicinity of a second focus of the reflector and a lens for closing the projector.
  • the lens may be formed by the lens itself.
  • Such a headlamp When such a headlamp must generate a cut-off beam regulatory such as a passing beam or a fog beam, it has a cover or screen interposed between the light source and the lens, which obscures the part of the radiation, which would otherwise spread over this cut.
  • a cut-off beam regulatory such as a passing beam or a fog beam
  • a difficulty with this type of projector then lies in the modification of the cut profile.
  • Such modification should be considered especially when a projector, designed for example for a sense of right-hand traffic, must form a light beam, cut, suitable for a left hand traffic. It may also be desirable to carry out a universal projector capable of selectively generating a beam of crossing, an anti-fog beam or an unbroken beam.
  • the document EP 0794 382 for example presents a projector equipped with a movable screen with vertical sliding to form on command a beam cut-off and operated for this purpose by an actuator.
  • An object of the invention is to provide a projector allowing to generate one or more cut beams by means of a transition dangerous and visually comfortable.
  • a vehicle headlamp comprising a frame and at least one screening screen mounted movable in rotation about an axis of rotation relative to the frame, in which the axis is inclined relative to a main axis of lighting of the projector.
  • the inclination of the axis causes a visual transition relatively soft when changing the beam.
  • This movement of the screen does not generate an aberration. This transition is not dangerous.
  • the screen or screens can be given relatively dimensions important without encountering problems of space in the projector.
  • the projector 2 comprises a reflector 4 in the form of an ellipsoid of revolution around a horizontal longitudinal axis 6 forming a main lighting direction of the projector.
  • the projector has a lamp holder 8 attached to the reflector in part back of it.
  • the projector also includes a fixed lens holder 10 in the front part of the reflector 4 and a lens 12 fixed in the front part of the lens holder, a local plane of the lens passing in the vicinity of a second focal point of the reflector.
  • the lamp holder, the reflector, the lens holder and the lens are follow along the axis 6.
  • the reflector 4 and the lens holder 10 constitute here a projector frame.
  • the projector may further include a housing containing these elements.
  • the projector has a screen 14 rigidly fixed to the frame.
  • the screen 14 has a curved shape, substantially cylindrical with generator vertical and center of curvature located towards the front of the projector.
  • Screen 14 extends vertically over a small height and horizontally over approximately the entire width of the lamp holder. It has a horizontal upper edge extending 0.5% below the axis 6 with reference to the focus of the lens 12.
  • This fixed screen avoids any risk of glare during the movement of the screen support part as will be seen below.
  • This screen is fixed by two side tabs 15 pinched and sandwiched between the edges of the reflector and of the lamp holder.
  • the projector comprises a support part 16 of general shape conical although its shape is not strictly that of a cone.
  • the room 16 is mounted movable in rotation about an axis 18, the axis of the "quasi cone". This axis extends in a vertical plane and is intersecting with the main axis 6. It intersects this axis in front of the fixed screen 14, approximately at the level of the lens 12.
  • the support part 16 is rigidly fixed to a shaft 20 extending along axis 18.
  • the support part 16 forms four mobile screens 22, 24, 26, 28 each capable of intercepting a portion of the beam reflected by the reflector 4 when the screen extends in the vicinity of the main axis 6.
  • the support part 16 is mounted movable in rotation about its axis 18 so that it can occupy four positions relative to the frame, separate from each other by a quarter turn and corresponding to the cooperation of respective screens with the beam.
  • the support part 16 when the screen 22 cooperates with the beam, as in the figures. This cooperation allows define the entire upper quarter of the support piece. So the support piece has a front face 30 centered on the axis 18 and inclined upwards and towards forward. It also has a “quasi-conical” face 32 of which a portion 32a associated with the screen 22 extends generally towards the rear in FIGS. 1 to 3. The generator of the portion 32a of this face 32 intercepting the cutting plane vertical in Figure 1 is vertical.
  • the screen 22 is formed at the junction between the face 32a and the face 30.
  • This junction extends from one to the other of its ends in a general plane horizontal passing in the vicinity of axis 6, as shown in Figure 1. From more, this junction has in top view a general curved shape similar to that of the fixed screen 14.
  • the mobile screen 22 extends over the entire width to a distance from the fixed screen 14 which is small and essentially constant the along the fixed screen. However, the ends of the fixed screen extend laterally beyond those of the mobile screen 22 which is shorter.
  • the junction between the faces 32a and 30 is truncated by a song of a certain thickness constituting the screen 22. This song has generators intersecting at focal point of the lens 6. The generator at the axis 6 is confused with this axis.
  • the cutoff profile is that referenced TD in FIG. 4 and is suitable for conventionally generate a passing beam for right-hand drive.
  • the rear portion 32a is shaped to connect the edge 22 to the shaft 20 of the in the least bulky way possible. It has a shape approaching that of a portion of cone.
  • the other three parts of the support part 16 are defined so similar in combination with the other three screens 24, 26 and 28.
  • the face front 30 thus has a generally square shape with curved edges with center of curvature directed forward.
  • the mobile screens 24, 26 and 28 are here formed to define bundles known per se and respectively illustrated in FIG. 4. These are respectively a left-hand drive (TG) passing beam, a main beam and a passing beam for driving on roads wet (AW). The latter in addition to cutting the passing beam avoids lighting of the road area in front of vehicles coming in reverse. Also, the conductors are not dazzled by the beam which otherwise it would reflect on them.
  • ML highway driving
  • the projector has an actuator 34 in the form of a stepper motor no shaft 20, controllable by the driver from the dashboard of the vehicle.
  • This actuator is associated with a stabilization device 36 comprising a duct 37 radial to the shaft 20 and opening onto the latter, in which is movable a ball 39 biased towards the shaft by means of a spring.
  • the shaft has four ball housings corresponding to the four positions of the support part. This device reduces the risk of untimely rotation of the mobile screen support part 16 without the engine being activated.
  • the motor 34 makes it possible to rotate in rotation around the axis 18 the four screens 22, 24, 26 and 28 and to position the support part so as to define the cut-off with the mobile screen selected by the driver by depending on the circumstances.
  • the support piece 16 can be made so that its more large dimension, for example between the extreme edges of two screens opposite, less than about five centimeters. It can also be made of a thin metallic material, for example a few tenths of a millimeter. As a result, the moving part, support for different types of screens, presents only a very low inertia.
  • the motor 24 may have only a low power, of the order of 1 to 2 Watts. Such an engine will then be inexpensive, and will consume little Electric power. We could even use a friction actuator system driven by a deformable piezoelectric element.
  • the time to response of this structure could be very weak: it is possible to switch from one position to another by a rotation at high speed, the time of transition between two positions being of the order of 100 milliseconds. With some switching time of this order of magnitude, the driver of the vehicle does feels any discomfort that could be caused by the shape of the cut in transition phase. Similarly, drivers of oncoming vehicles reverse are not likely to be dazzled during a cut change.
  • the lamp 9 may be a halogen lamp or a lamp with dump.
  • the actuator 34, the ball device 36 and the screen support mobile 16 may extend in whole or in part through openings reflector 4 and / or lens holder 10. These openings are few visible from outside the projector. In addition, they practically do not alter not the operation of the projector.
  • the lower openings of the reflector 4 do not alter not substantially the beam formed by the reflector.
  • the motor, the stabilization device and the screen support extend opposite an area of the reflector not very useful for the definition of the beam and therefore not detrimental to its formation.
  • a mobile screen when a mobile screen extends in the vicinity of axis 6 in position to form a cut, its distance from the fixed screen will be 0.1 to 0.2 mm.
  • the inclination of the axis 18 combined with the taper present the advantage that the edge of the screens follows the field curve of the lens 12, which is in the first order comparable to a circle.
  • This provision is particularly favorable for obtaining optimal optical quality for beam.
  • a inclination of the axis 18 relative to the optical axis 6 between 5 and 50 °, in depending on the lens in question, fulfills this condition. With a projector currently in series, an angle of 20 ° gave the best results.
  • the projector according to the invention also has the advantage that the mechanical device is particularly simple even when combined with a high number of mobile screens.
  • the reduced size of the motor 34 associated with the inclination of the axis 18 allows the motor 34 to be housed practically inside the volume delimited by the reflector 4 and the lens holder 10, the projector thus equipped having the same footprint, and the same aspect, as a projector having only one screen fixed providing a single cut.
  • Support part 16 may be associated with a number of screens other than 4 for example, 2, 3, 5, or more. It can even be associated with a single screen.
  • Provision may be made for the axis of rotation 18 of the support piece of mobile screens is slightly inclined relative to the median vertical axis of the projector if this is advantageous in terms of space or performance optical. Preferably, this inclination will not exceed a few degrees.
  • other types of cut beams than those previously described are possible in association with the present invention.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The headlight (2) has an elliptical reflector (4), lens (12) and fixed cylindrical screen (14). In addition a number of screens are mounted on a conical support (16) which is rotated on an axis (18) by a motor (34). The screen axis is at an angle to the headlight axis (6) and the screens allow the beam to be varied to suit left hand and right hand steering and different road conditions

Description

L'invention concerne les projecteurs pour véhicule, notamment ceux munis d'un réflecteur de type elliptique.The invention relates to vehicle headlights, in particular those fitted with an elliptical type reflector.

Un projecteur de ce type comprend de manière classique une source lumineuse, un réflecteur du genre elliptique, dont un premier foyer est situé au voisinage de la source, une lentille convergente dont un plan focal passe au voisinage d'un second foyer du réflecteur et une glace de fermeture du projecteur. Dans certains cas, la lentille peut être constituée par la glace elle-même.A projector of this type conventionally comprises a light source, an elliptical type reflector, a first focus of which is located near the source, a converging lens including a focal plane passes in the vicinity of a second focus of the reflector and a lens for closing the projector. In some cases, the lens may be formed by the lens itself.

Lorsqu'un tel projecteur doit engendrer un faisceau à coupure réglementaire tel qu'un faisceau de croisement ou un faisceau antibrouillard, il comporte un cache ou écran interposé entre la source lumineuse et la lentille, qui occulte la partie du rayonnement, qui autrement se propagerait au-dessus de cette coupure.When such a headlamp must generate a cut-off beam regulatory such as a passing beam or a fog beam, it has a cover or screen interposed between the light source and the lens, which obscures the part of the radiation, which would otherwise spread over this cut.

Une difficulté de ce type de projecteur réside alors dans la modification du profil de la coupure. Une telle modification doit être envisagée notamment lorsqu'un projecteur, conçu par exemple pour un sens de circulation à droite, doit former un faisceau lumineux, coupé, adapté à une circulation à gauche. Il peut être également souhaitable de réaliser un projecteur universel capable d'engendrer sélectivement un faisceau de croisement, un faisceau antibrouillard ou un faisceau sans coupure.A difficulty with this type of projector then lies in the modification of the cut profile. Such modification should be considered especially when a projector, designed for example for a sense of right-hand traffic, must form a light beam, cut, suitable for a left hand traffic. It may also be desirable to carry out a universal projector capable of selectively generating a beam of crossing, an anti-fog beam or an unbroken beam.

Le document EP 0794 382 par exemple présente un projecteur muni d'un écran mobile à coulissement vertical pour former sur commande un faisceau à coupure et manoeuvré à cette fin par un actionneur.The document EP 0794 382 for example presents a projector equipped with a movable screen with vertical sliding to form on command a beam cut-off and operated for this purpose by an actuator.

Toutefois, les changements de position des caches de ce type de projecteur se font avec des transitions de faisceau qui ou bien sont éblouissantes pour le véhicule venant d'en face, ou bien engendrent momentanément un faisceau tronqué, ce qui dans les deux cas est dangereux.However, the position changes of the caches of this type of projector are made with beam transitions which either are dazzling for the vehicle coming opposite, or else generate momentarily a truncated beam, which in both cases is dangerous.

Dans d'autres cas, tel qu'avec le projecteur du document US-5 673 990 à écran basculant vers l'avant, la transition est visuellement moins confortable puisqu'elle engendre un flou de coupure et/ou des distorsions chromatiques.In other cases, such as with the projector from document US-5,673 990 with tilting screen forward, the transition is visually less comfortable since it generates a blurring of cut and / or distortions chromatic.

Pour tenter de pallier ces inconvénients, on a proposé dans le document EP 0 780 624 un projecteur à écran monté mobile à rotation autour d'un axe parallèle à l'axe principal du projecteur. Toutefois, ce projecteur ne donne pas entière satisfaction.To try to overcome these drawbacks, it has been proposed in the document EP 0 780 624 a projector with a screen mounted movable about rotation an axis parallel to the main axis of the projector. However, this projector does not not entirely satisfactory.

Un but de l'invention est de fournir un projecteur permettant d'engendrer un ou plusieurs faisceaux à coupure au moyen d'une transition peu dangereuse et visuellement confortable.An object of the invention is to provide a projector allowing to generate one or more cut beams by means of a transition dangerous and visually comfortable.

En vue de la réalisation de ce but, on prévoit selon l'invention un projecteur pour véhicule, comportant un bâti et au moins un écran d'occultation monté mobile à rotation autour d'un axe de rotation par rapport au bâti, dans lequel l'axe est incliné par rapport à un axe principal d'éclairage du projecteur.In order to achieve this goal, there is provided according to the invention a vehicle headlamp, comprising a frame and at least one screening screen mounted movable in rotation about an axis of rotation relative to the frame, in which the axis is inclined relative to a main axis of lighting of the projector.

Ainsi, l'inclinaison de l'axe entraíne une transition visuelle relativement douce lors d'un changement de faisceau. Ce mouvement de l'écran n'engendre pas d'aberration. Cette transition n'est pas dangereuse. En outre, on peut donner à l'écran ou aux écrans des dimensions relativement importantes sans rencontrer de problèmes d'encombrement dans le projecteur.Thus, the inclination of the axis causes a visual transition relatively soft when changing the beam. This movement of the screen does not generate an aberration. This transition is not dangerous. In in addition, the screen or screens can be given relatively dimensions important without encountering problems of space in the projector.

Le projecteur selon l'invention pourra en outre présenter au moins l'une des caractéristiques suivantes :

  • il comporte au moins deux écrans,
  • il comporte quatre écrans,
  • il comporte des écrans rigidement fixés mutuellement,
  • le ou chaque écran a un profil de forme courbe,
  • l'axe de rotation est sécant avec l'axe principal,
  • l'axe de rotation est sécant à point situé à l'avant du projecteur par référence aux écrans,
  • l'axe de rotation s'étend sensiblement dans un plan vertical.
  • Il comporte un axe de rotation incliné vers le haut en direction de l'avant du projecteur,
  • l'axe de rotation est légèrement incliné par rapport au plan horizontal,
  • il comporte plusieurs écrans mobiles formés par différentes portions d'un même support,
  • les écrans sont formés par différents bords d'extrémité libre du support,
  • il comporte un support de forme générale conique,
  • l'écran ou au moins l'un des écrans est apte à définir l'un des faisceaux parmi le groupe suivant :
    • faisceau de croisement pour conduite à gauche ;
    • faisceau de croisement pour conduite à droite ;
    • faisceau de croisement pour conduite par temps de pluie ;
    • faisceau de croisement pour conduite sur autoroute ; et
    • faisceau de route
  • il comporte en outre un écran rigidement fixé au bâti,
  • l'écran fixe est apte à coopérer avec l'écran mobile ou au moins l'un des écrans mobiles pour former un faisceau du projecteur
  • il comprend un réflecteur en forme d'ellipsoïde de révolution.
The projector according to the invention may also have at least one of the following characteristics:
  • it has at least two screens,
  • it has four screens,
  • it has screens rigidly fixed to each other,
  • the or each screen has a curved profile,
  • the axis of rotation intersects with the main axis,
  • the axis of rotation is intersecting at a point located at the front of the projector with reference to the screens,
  • the axis of rotation extends substantially in a vertical plane.
  • It has an axis of rotation inclined upwards towards the front of the projector,
  • the axis of rotation is slightly inclined with respect to the horizontal plane,
  • it comprises several mobile screens formed by different portions of the same support,
  • the screens are formed by different free end edges of the support,
  • it has a generally conical support,
  • the screen or at least one of the screens is capable of defining one of the beams from the following group:
    • dipped beam for left-hand drive;
    • dipped beam for right-hand drive;
    • passing beam for driving in rainy weather;
    • dipped beam for highway driving; and
    • road beam
  • it further comprises a screen rigidly fixed to the frame,
  • the fixed screen is able to cooperate with the mobile screen or at least one of the mobile screens to form a beam of the projector
  • it includes a reflector in the shape of an ellipsoid of revolution.

D'autres caractéristiques et avantages de l'invention apparaítront encore à la lecture de la description suivante d'un mode préféré de réalisation donnée à titre d'exemple non limitatif.
Aux dessins annexés :

  • la figure 1 est une vue en coupe suivant un plan longitudinal vertical d'un projecteur selon un mode préféré de réalisation de l'invention ;
  • la figure 2 est une vue en coupe selon un plan longitudinal horizontal du projecteur de la figure 1, le support d'écran étant illustré en vue de dessus ;
  • la figure 3 est une vue de face du projecteur des figures 1 et 2 ; et
  • la figure 4 montre cinq profils de coupure associés à l'écran du projecteur de la figure 1.
Other characteristics and advantages of the invention will become apparent on reading the following description of a preferred embodiment given by way of non-limiting example.
In the accompanying drawings:
  • Figure 1 is a sectional view along a vertical longitudinal plane of a projector according to a preferred embodiment of the invention;
  • Figure 2 is a sectional view along a horizontal longitudinal plane of the projector of Figure 1, the screen support being illustrated in top view;
  • Figure 3 is a front view of the projector of Figures 1 and 2; and
  • FIG. 4 shows five cut profiles associated with the screen of the projector in FIG. 1.

Dans le mode de réalisation illustré aux figures, le projecteur 2 comporte un réflecteur 4 en forme d'un ellipsoïde de révolution autour d'un axe longitudinal horizontal 6 formant une direction principale d'éclairage du projecteur. Le projecteur comporte un porte-lampe 8 fixé au réflecteur en partie arrière de celui-ci. Le projecteur comporte également un porte-lentille 10 fixé en partie avant du réflecteur 4 et une lentille 12 fixée en partie avant du porte-lentille, un plan local de la lentille passant au voisinage d'un deuxième foyer du réflecteur. Le porte-lampe, le réflecteur, le porte-lentille et la lentille se succèdent le long de l'axe 6. Le réflecteur 4 et le porte-lentille 10 constituent ici un bâti du projecteur. Le projecteur peut en outre comprendre un boítier renfermant ces éléments.In the embodiment illustrated in the figures, the projector 2 comprises a reflector 4 in the form of an ellipsoid of revolution around a horizontal longitudinal axis 6 forming a main lighting direction of the projector. The projector has a lamp holder 8 attached to the reflector in part back of it. The projector also includes a fixed lens holder 10 in the front part of the reflector 4 and a lens 12 fixed in the front part of the lens holder, a local plane of the lens passing in the vicinity of a second focal point of the reflector. The lamp holder, the reflector, the lens holder and the lens are follow along the axis 6. The reflector 4 and the lens holder 10 constitute here a projector frame. The projector may further include a housing containing these elements.

Le projecteur comporte un écran 14 rigidement fixé au bâti. L'écran 14 a une forme courbe, sensiblement cylindrique à génératrice verticale et centre de courbure situé vers l'avant du projecteur. L'écran 14 s'étend verticalement sur une faible hauteur et horizontalement sur environ toute la largeur du porte-lampe. Il présente un bord supérieur horizontal s'étendant à 0,5% au dessous de l'axe 6 par référence au foyer de la lentille 12. Cet écran fixe évite tout risque d'éblouissement durant le mouvement de la pièce support d'écran comme on le verra ci-après. Cet écran est fixé par deux pattes latérales 15 pincées et prises en sandwich entre les bords du réflecteur et du porte-lampe.The projector has a screen 14 rigidly fixed to the frame. The screen 14 has a curved shape, substantially cylindrical with generator vertical and center of curvature located towards the front of the projector. Screen 14 extends vertically over a small height and horizontally over approximately the entire width of the lamp holder. It has a horizontal upper edge extending 0.5% below the axis 6 with reference to the focus of the lens 12. This fixed screen avoids any risk of glare during the movement of the screen support part as will be seen below. This screen is fixed by two side tabs 15 pinched and sandwiched between the edges of the reflector and of the lamp holder.

Le projecteur comporte une pièce support 16 de forme générale conique bien que sa forme ne soit pas rigoureusement celle d'un cône. La pièce 16 est montée mobile en rotation autour d'un axe 18, l'axe du « quasi cône ». Cet axe s'étend dans un plan vertical et est sécant avec l'axe principal 6. Il coupe cet axe en avant de l'écran fixe 14, environ au niveau de la lentille 12.The projector comprises a support part 16 of general shape conical although its shape is not strictly that of a cone. The room 16 is mounted movable in rotation about an axis 18, the axis of the "quasi cone". This axis extends in a vertical plane and is intersecting with the main axis 6. It intersects this axis in front of the fixed screen 14, approximately at the level of the lens 12.

La pièce support 16 est rigidement fixée à un arbre 20 s'étendant suivant l'axe 18. The support part 16 is rigidly fixed to a shaft 20 extending along axis 18.

La pièce support 16 forme quatre écrans mobiles 22, 24, 26, 28 aptes chacun à intercepter une portion du faisceau réfléchi par le réflecteur 4 lorsque l'écran s'étend au voisinage de l'axe principal 6.The support part 16 forms four mobile screens 22, 24, 26, 28 each capable of intercepting a portion of the beam reflected by the reflector 4 when the screen extends in the vicinity of the main axis 6.

La pièce support 16 est montée mobile à rotation autour de son axe 18 de sorte qu'elle peut occuper quatre positions par rapport au bâti, séparées les unes des autres par un quart de tour et correspondant aux coopérations des écrans respectifs avec le faisceau.The support part 16 is mounted movable in rotation about its axis 18 so that it can occupy four positions relative to the frame, separate from each other by a quarter turn and corresponding to the cooperation of respective screens with the beam.

On va d'abord décrire la pièce support 16 lorsque l'écran 22 coopère avec le faisceau , comme sur les figures. Cette coopération permet de définir tout le quart supérieur de la pièce support. Ainsi, la pièce support présente une face avant 30 centrée sur l'axe 18 et inclinée vers le haut et vers l'avant. Elle comporte aussi une face « quasi conique » 32 dont une portion 32a associée à l'écran 22 s'étend globalement vers l'arrière sur les figures 1 à 3. La génératrice de la portion 32a de cette face 32 interceptant le plan de coupe verticale sur la figure 1 est verticale.We will first describe the support part 16 when the screen 22 cooperates with the beam, as in the figures. This cooperation allows define the entire upper quarter of the support piece. So the support piece has a front face 30 centered on the axis 18 and inclined upwards and towards forward. It also has a “quasi-conical” face 32 of which a portion 32a associated with the screen 22 extends generally towards the rear in FIGS. 1 to 3. The generator of the portion 32a of this face 32 intercepting the cutting plane vertical in Figure 1 is vertical.

L'écran 22 est formé à la jonction entre la face 32a et la face 30. Cette jonction s'étend de l'une à l'autre de ses extrémités dans un plan général horizontal passant au voisinage de l'axe 6, comme le montre la figure 1. De plus, cette jonction a en vue de dessus une forme générale courbe similaire à celle de l'écran fixe 14. De fait, l'écran mobile 22 s'étend sur toute la largeur à une distance de l'écran fixe 14 qui est faible et essentiellement constante le long de l'écran fixe. Toutefois, les extrémités de l'écran fixe s'étendent latéralement au-delà de celles de l'écran mobile 22 qui est plus court. La jonction entre les faces 32a et 30 est tronquée par un chant d'une certaine épaisseur constituant l'écran 22. Ce chant a des génératrices se coupant au foyer de la lentille 6. La génératrice au niveau de l'axe 6 est confondue avec cet axe. Le profil de coupure est celui référencé TD sur la figure 4 et est apte à générer de façon classique un faisceau de croisement pour conduite à droite. La portion arrière 32a est conformée pour relier le chant 22 à l'arbre 20 de la façon la moins volumineuse possible . Elle a une forme approchant celle d'une portion de cône.The screen 22 is formed at the junction between the face 32a and the face 30. This junction extends from one to the other of its ends in a general plane horizontal passing in the vicinity of axis 6, as shown in Figure 1. From more, this junction has in top view a general curved shape similar to that of the fixed screen 14. In fact, the mobile screen 22 extends over the entire width to a distance from the fixed screen 14 which is small and essentially constant the along the fixed screen. However, the ends of the fixed screen extend laterally beyond those of the mobile screen 22 which is shorter. The junction between the faces 32a and 30 is truncated by a song of a certain thickness constituting the screen 22. This song has generators intersecting at focal point of the lens 6. The generator at the axis 6 is confused with this axis. The cutoff profile is that referenced TD in FIG. 4 and is suitable for conventionally generate a passing beam for right-hand drive. The rear portion 32a is shaped to connect the edge 22 to the shaft 20 of the in the least bulky way possible. It has a shape approaching that of a portion of cone.

Les trois autres parties de la pièce support 16 sont définies de façon semblables en association avec les trois autres écrans 24, 26 et 28. La face avant 30 a ainsi une forme générale carrée à bords courbes à centre de courbure dirigé vers l'avant. Les écrans mobiles 24, 26 et 28 sont ici formés pour définir des faisceaux connus en soi et respectivement illustrés à la figure 4. Il s'agit respectivement d'un faisceau de croisement pour conduite à gauche (TG), d'un faisceau de route et d'un faisceau de croisement pour conduite sur chaussée mouillée (AW). Ce dernier en plus de la coupure du faisceau de croisement évite l'éclairage de la zone de la route située devant les véhicules venant en sens inverse. Aussi, les conducteurs ne sont-ils pas éblouis par le faisceau qui sinon s'y réfléchirait en leur direction. En remplacement de l'un des écrans 23, 24 et 28, ou pourra munir la pièce support d'un écran 29 formant un faisceau de croisement pour conduite sur autoroute (ML).The other three parts of the support part 16 are defined so similar in combination with the other three screens 24, 26 and 28. The face front 30 thus has a generally square shape with curved edges with center of curvature directed forward. The mobile screens 24, 26 and 28 are here formed to define bundles known per se and respectively illustrated in FIG. 4. These are respectively a left-hand drive (TG) passing beam, a main beam and a passing beam for driving on roads wet (AW). The latter in addition to cutting the passing beam avoids lighting of the road area in front of vehicles coming in reverse. Also, the conductors are not dazzled by the beam which otherwise it would reflect on them. To replace one of the screens 23, 24 and 28, or may provide the support part with a screen 29 forming a beam for highway driving (ML).

Le projecteur comporte un actionneur 34 sous la forme d'un moteur pas à pas d'arbre 20, commandable par le conducteur depuis le tableau de bord du véhicule. Cet actionneur est associé à un dispositif de stabilisation 36 comprenant un conduit 37 radial à l'arbre 20 et débouchant sur celui-ci, dans lequel est mobile une bille 39 sollicitée vers l'arbre au moyen d'un ressort. L'arbre présente quatre logements de bille correspondant aux quatre positions de la pièce support . Ce dispositif réduit le risque de rotation intempestive de la pièce support d'écrans mobiles 16 sans que le moteur soit actionné .The projector has an actuator 34 in the form of a stepper motor no shaft 20, controllable by the driver from the dashboard of the vehicle. This actuator is associated with a stabilization device 36 comprising a duct 37 radial to the shaft 20 and opening onto the latter, in which is movable a ball 39 biased towards the shaft by means of a spring. The shaft has four ball housings corresponding to the four positions of the support part. This device reduces the risk of untimely rotation of the mobile screen support part 16 without the engine being activated.

Le moteur 34 permet de faire tourner à rotation autour de l'axe 18 les quatre écrans 22, 24, 26 et 28 et de positionner la pièce support de façon à définir la coupure avec l'écran mobile sélectionné par le conducteur en fonction des circonstances.The motor 34 makes it possible to rotate in rotation around the axis 18 the four screens 22, 24, 26 and 28 and to position the support part so as to define the cut-off with the mobile screen selected by the driver by depending on the circumstances.

La pièce support 16 peut être réalisée de manière à ce que sa plus grande dimension, par exemple entre les bords extrêmes de deux écrans opposés, soit inférieure à environ cinq centimètres. Elle peut de plus être réalisée en un matériau métallique de faible épaisseur, par exemple de quelques dixièmes de millimètre. Il en résulte alors que la partie mobile, support des différents types d'écrans, ne présente qu'une très faible inertie.The support piece 16 can be made so that its more large dimension, for example between the extreme edges of two screens opposite, less than about five centimeters. It can also be made of a thin metallic material, for example a few tenths of a millimeter. As a result, the moving part, support for different types of screens, presents only a very low inertia.

Une telle structure présente de nombreux avantages. En premier lieu, le moteur 24 pourra n'avoir qu'une puissance faible, de l'ordre de 1 à 2 Watts. Un tel moteur sera alors peu onéreux, et ne consommera que peu de courant électrique. On pourra même utiliser un système d'actuateur par friction mû par un élément déformable piézo-électrique. En deuxième lieu, le temps de réponse de cette structure pourra être très faible : il est possible de basculer d'une position à une autre par une rotation à vitesse élevée, le temps de transition entre deux positions étant de l'ordre de 100 millisecondes. Avec des temps de commutation de cet ordre de grandeur, le conducteur du véhicule ne ressent aucune gêne qui pourrait être causée par la forme de la coupure en phase de transition. De même, les conducteurs de véhicules venant en sens inverse ne risquent pas d'être éblouis lors d'un changement de coupure.Such a structure has many advantages. First place, the motor 24 may have only a low power, of the order of 1 to 2 Watts. Such an engine will then be inexpensive, and will consume little Electric power. We could even use a friction actuator system driven by a deformable piezoelectric element. Second, the time to response of this structure could be very weak: it is possible to switch from one position to another by a rotation at high speed, the time of transition between two positions being of the order of 100 milliseconds. With some switching time of this order of magnitude, the driver of the vehicle does feels any discomfort that could be caused by the shape of the cut in transition phase. Similarly, drivers of oncoming vehicles reverse are not likely to be dazzled during a cut change.

La lampe 9 pourra être une lampe halogène ou une lampe à décharge.The lamp 9 may be a halogen lamp or a lamp with dump.

L'actionneur 34, le dispositif à bille 36 et le support d'écrans mobiles 16 pourront s'étendre en tout ou partie à travers des ouvertures inférieures du réflecteur 4 et/ou du porte lentille 10. Ces ouvertures sont peu visibles depuis l'extérieur du projecteur. De plus, elles n'altèrent pratiquement pas le fonctionnement du projecteur.The actuator 34, the ball device 36 and the screen support mobile 16 may extend in whole or in part through openings reflector 4 and / or lens holder 10. These openings are few visible from outside the projector. In addition, they practically do not alter not the operation of the projector.

En particulier, les ouvertures inférieures du réflecteur 4 n'altèrent pas sensiblement le faisceau formé par le réflecteur.In particular, the lower openings of the reflector 4 do not alter not substantially the beam formed by the reflector.

Dans le mode de réalisation qui vient d'être décrit, le moteur, le dispositif de stabilisation et le support d'écrans s'étendent en regard d'une zone du réflecteur peu utile pour la définition du faisceau et donc non préjudiciable à sa formation. In the embodiment which has just been described, the motor, the stabilization device and the screen support extend opposite an area of the reflector not very useful for the definition of the beam and therefore not detrimental to its formation.

De préférence, lorsqu'un écran mobile s'étend au voisinage de l'axe 6 en position pour former une coupure, sa distance à l'écran fixe sera de 0,1 à 0,2 mm.Preferably, when a mobile screen extends in the vicinity of axis 6 in position to form a cut, its distance from the fixed screen will be 0.1 to 0.2 mm.

En raison de l'inclinaison de l'axe 18 par rapport à l'axe principal 6, et au surplus en raison de la présence de l'écran fixe 14, les changements de position des écrans ou caches se font au moyen de transitions peu dangereuses (pas d'éblouissement et pas de réduction de faisceau) et relativement confortable (pas de génération de flou de coupure ni de distorsion chromatique).Due to the inclination of axis 18 relative to the main axis 6, and moreover due to the presence of the fixed screen 14, the changes in position of the screens or covers are done by means of little dangerous transitions (no glare and no beam reduction) and relatively comfortable (no generation of cut-out blur or distortion chromatic).

L'inclinaison de l'axe 18 combinée à la conicité présente l'avantage que le bord des écrans épouse la courbe de champ de la lentille 12, qui est au premier ordre assimilable à un cercle. Cette disposition est particulièrement favorable pour obtenir une qualité optique optimale pour le faisceau. En fonction de la configuration spécifique de chaque projecteur, et de chaque lentille en particulier, notamment ses dimensions et sa distance focale, on peut trouver aisément une inclinaison de l'axe 18 optimale pour que les bords des écrans épousent la courbe de champ de la lentille considérée. Une inclinaison de l'axe 18 par rapport à l'axe optique 6 comprise entre 5 et 50°, en fonction de la lentille considérée, permet de remplir cette condition. Avec un projecteur actuellement en série, un angle de 20° a donné les meilleurs résultats.The inclination of the axis 18 combined with the taper present the advantage that the edge of the screens follows the field curve of the lens 12, which is in the first order comparable to a circle. This provision is particularly favorable for obtaining optimal optical quality for beam. Depending on the specific configuration of each projector, and each lens in particular, in particular its dimensions and its focal distance, one can easily find an optimal inclination of the axis 18 so that the edges of the screens follow the field curve of the lens in question. A inclination of the axis 18 relative to the optical axis 6 between 5 and 50 °, in depending on the lens in question, fulfills this condition. With a projector currently in series, an angle of 20 ° gave the best results.

Le projecteur selon l'invention a également pour avantage que le dispositif mécanique est particulièrement simple même lorsqu'il est associé à un nombre élevé d'écrans mobiles.The projector according to the invention also has the advantage that the mechanical device is particularly simple even when combined with a high number of mobile screens.

La taille réduite du moteur 34 associée à l'inclinaison de l'axe 18 permet de loger le moteur 34 pratiquement à l'intérieur du volume délimité par le réflecteur 4 et le porte-lentille 10, le projecteur ainsi équipé ayant le même encombrement, et le même aspect, qu'un projecteur n'ayant qu'un seul écran fixe procurant une seule coupure. The reduced size of the motor 34 associated with the inclination of the axis 18 allows the motor 34 to be housed practically inside the volume delimited by the reflector 4 and the lens holder 10, the projector thus equipped having the same footprint, and the same aspect, as a projector having only one screen fixed providing a single cut.

Bien entendu, on pourra apporter à l'invention de nombreuses modifications sans sortir du cadre de celle-ci.Of course, we can bring to the invention many modifications without departing from the framework thereof.

La pièce support 16 pourra être associée à un nombre d'écrans différent de 4 par exemple, 2, 3, 5, ou plus. Elle pourra même être associée à un unique écran.Support part 16 may be associated with a number of screens other than 4 for example, 2, 3, 5, or more. It can even be associated with a single screen.

On pourra prévoir que l'axe de rotation 18 de la pièce support d'écrans mobiles est légèrement incliné par rapport à l'axe vertical médian du projecteur si cela est avantageux en terme d'encombrement ou de performance optique. De préférence, cette inclinaison ne dépassera pas quelques degrés. Bien entendu, d'autres types de faisceaux à coupure que ceux précédemment décrits sont envisageables en association avec la présente invention.Provision may be made for the axis of rotation 18 of the support piece of mobile screens is slightly inclined relative to the median vertical axis of the projector if this is advantageous in terms of space or performance optical. Preferably, this inclination will not exceed a few degrees. Of course, other types of cut beams than those previously described are possible in association with the present invention.

Claims (17)

Projecteur pour véhicule, comportant un bâti (4,10) et au moins un écran d'occultation (22, 24, 26, 28) monté mobile à rotation autour d'un axe de rotation (18) par rapport au bâti, caractérisé en ce que l'axe (18) est incliné par rapport à un axe principal d'éclairage (6) du projecteur.Headlamp for vehicle, comprising a frame (4,10) and at least one screen (22, 24, 26, 28) mounted movable in rotation about an axis of rotation (18) relative to the frame, characterized in that the axis (18) is inclined relative to a main axis of lighting (6) of the projector. Projecteur selon la revendication 1 caractérisé en ce qu'il comporte au moins deux écrans (22, 24, 26, 28).Projector according to claim 1 characterized in that it comprises at least two screens (22, 24, 26, 28). Projecteur selon la revendication 1 ou 2, caractérisé en ce qu'il comporte quatre écrans (22, 24, 26, 28).Projector according to claim 1 or 2, characterized in that it comprises four screens (22, 24, 26, 28). Projecteur selon l'une des revendications 2 à 3, caractérisé en ce que les écrans (22, 24, 26, 28) sont rigidement fixés mutuellement.Projector according to one of claims 2 to 3, characterized in that the screens (22, 24, 26, 28) are rigidly fixed to each other. Projecteur selon l'une des revendications 1 à 4, caractérisé en ce que le ou chaque écran (22, 24, 26, 28) a un profil de forme courbe.Projector according to one of claims 1 to 4, characterized in that the or each screen (22, 24, 26, 28) has a profile of curved shape. Projecteur selon l'une des revendications 1 à 5, caractérisé en ce que l'axe de rotation (18) est sécant avec l'axe principal (6).Projector according to one of claims 1 to 5, characterized in that the axis of rotation (18) intersects with the main axis (6). Projecteur selon l'une des revendications 1 à 6, caractérisé en ce que l'axe de rotation (18) est sécant avec l'axe principal à un point situé à l'avant du projecteur par référence à ou aux écrans (22, 24, 26, 28).Projector according to one of Claims 1 to 6, characterized in that the axis of rotation (18) intersects with the main axis at a point situated at the front of the projector by reference to the screen (s) (22, 24 , 26, 28). Projecteur selon l'une des revendications 1 à 7, caractérisé en ce que l'axe de rotation (18) s'étend sensiblement dans un plan vertical.Projector according to one of claims 1 to 7, characterized in that the axis of rotation (18) extends substantially in a vertical plane. Projecteur selon l'une des revendication 1 à 8, caractérisé en ce que l'axe de rotation (18) est incliné vers le haut en direction de l'avant du projecteur.Projector according to one of Claims 1 to 8, characterized in that the axis of rotation (18) is inclined upwards towards the front of the projector. Projecteur selon l'une des revendication 1 à 9, caractérisé en que l'axe de rotation (18) est incliné par rapport au plan horizontal.Projector according to one of claims 1 to 9, characterized in that the axis of rotation (18) is inclined relative to the horizontal plane. Projecteur selon l'une des revendication 1 à 10, caractérisé en ce qu'il comporte plusieurs écrans mobiles (22, 24, 26, 28) formés par différentes portions d'un même support (16). Projector according to one of claims 1 to 10, characterized in that it comprises several mobile screens (22, 24, 26, 28) formed by different portions of the same support (16). Projecteur selon la revendication 11, caractérisé en ce que les écrans (22, 24, 26, 28) sont formés par différents bords d'extrémité libre du support (16).Projector according to claim 11, characterized in that the screens (22, 24, 26, 28) are formed by different free end edges of the support (16). Projecteur selon l'une des revendication 11 à 12, caractérisé en ce que le support (16) a une forme générale conique .Projector according to one of claims 11 to 12, characterized in that the support (16) has a generally conical shape. Projecteur selon l'une des revendications 1 à 13, caractérisé en ce que l'écran ou au moins l'un des écrans (22, 24, 26, 28) est apte à définir l'un des faisceaux parmi le groupe suivant : faisceau de croisement pour conduite à gauche (TG); faisceau de croisement pour conduite à droite (TD) ; faisceau de croisement pour conduite par temps de pluie (AW) ; faisceau de croisement pour conduite sur autoroute (ML) ; et faisceau de route. Projector according to one of claims 1 to 13, characterized in that the screen or at least one of the screens (22, 24, 26, 28) is capable of defining one of the beams from the following group: dipped beam for left-hand drive (TG); dipped beam for right-hand drive (TD); passing beam for driving in rainy weather (AW); driving beam for driving on motorways (ML); and road beam. Projecteur selon l'une des revendications 1 à 14, caractérisé en ce qu'il comporte en outre un écran fixe (14) rigidement fixé au bâti (4, 10)Projector according to one of claims 1 to 14, characterized in that it further comprises a fixed screen (14) rigidly fixed to the frame (4, 10) Projecteur selon la revendication 15, caractérisé en ce l'écran fixe (14) est apte à coopérer avec l'écran mobile ou au moins l'un des écrans mobiles (22, 24, 26, 28) pour former un faisceau du projecteur.Projector according to claim 15, characterized in that the fixed screen (14) is able to cooperate with the mobile screen or at least one of the mobile screens (22, 24, 26, 28) to form a beam of the projector. Projecteur selon l'une des revendications 1 à 16, caractérisé en ce qu'il comprend un réflecteur (4) en forme d'ellipsoïde de révolution.Projector according to one of Claims 1 to 16, characterized in that it comprises a reflector (4) in the form of an ellipsoid of revolution.
EP01402571A 2000-10-12 2001-10-04 Motor vehicle headlamp comprising an adjustable shade Expired - Lifetime EP1197387B1 (en)

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FR0013055A FR2815310B1 (en) 2000-10-12 2000-10-12 PROJECTOR FOR MOTOR VEHICLE WITH MOBILE OCCULTATION SCREEN

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AT502738B1 (en) * 2002-07-01 2007-10-15 Fair S R L CHILD SEAT MOUNTING AND CHILD RETENTION DEVICE FOR MOTOR VEHICLES
FR2845330A1 (en) 2002-10-04 2004-04-09 Valeo Vision Headlamp for motor vehicle, uses piezoelectric motor to displace inside reflector to alter position of screens to control beam spread from lamp
US7452116B2 (en) 2004-04-27 2008-11-18 Valeo Vision Headlamp device with multifunction actuator block for a motor vehicle
EP1605202A2 (en) 2004-06-09 2005-12-14 Valeo Vision Multifunctional headlamp device
FR2871552A1 (en) * 2004-06-09 2005-12-16 Valeo Vision Sa Headlight device for motor vehicle, has mask movable in rotation around rotational axis and presenting active side composed of two different portions, where part of portions provides two different sections for light beam
EP1605202A3 (en) * 2004-06-09 2008-11-05 Valeo Vision Multifunctional headlamp device
US7284888B2 (en) 2004-06-09 2007-10-23 Valeo Vision Multifunction light device
EP1637395A1 (en) 2004-09-21 2006-03-22 Valeo Vision Headlamp for a vehicle
FR2875581A1 (en) * 2004-09-21 2006-03-24 Valeo Vision Sa LIGHTING DEVICE AND / OR SIGNALING OF THE PROJECTOR TYPE FOR A MOTOR VEHICLE
EP1684004A1 (en) 2005-01-21 2006-07-26 Valeo Vision Vehicle headlight with two lighting beams
US7201504B2 (en) 2005-01-21 2007-04-10 Valeo Vision Optical module for a lighting device for motor vehicle, designed to give at least one main cut-off beam
US7583451B2 (en) 2005-03-22 2009-09-01 Valeo Vision Lens for an optical module of a lighting apparatus for a motor vehicle
FR2886376A1 (en) 2005-05-27 2006-12-01 Valeo Vision Sa OPTICAL MODULE FOR AUTOMOTIVE LIGHTING DEVICE
EP1726875A1 (en) 2005-05-27 2006-11-29 Valeo Vision Optical module for vehicle lighting system
FR2888916A1 (en) 2005-07-21 2007-01-26 Valeo Vision Sa OPTICAL MODULE FOR AUTOMOTIVE LIGHTING DEVICE
EP1746340A2 (en) 2005-07-21 2007-01-24 Valeo Vision Optical module for a motor vehicle lighting device
US7722233B2 (en) 2005-07-21 2010-05-25 Valeo Vision Optical module for a motor vehicle lighting device
FR2898403A1 (en) 2006-03-07 2007-09-14 Valeo Vision Sa Biconvex/aspherical lens for elliptic optical module of e.g. motor vehicle`s headlight, has zones with focal lengths adapted to red, blue, orange and violet colors, respectively, where lens is made of polymer material e.g. polycarbonate
EP2006604A1 (en) 2007-06-18 2008-12-24 Valeo Vision Optical module for vehicular lighting device
EP2006605A1 (en) 2007-06-18 2008-12-24 Valeo Vision Vehicle headlamp
EP2244007A1 (en) 2009-04-24 2010-10-27 Valeo Vision Optical device for an automobile
DE202010018336U1 (en) 2009-04-24 2015-09-14 Valeo Vision Optical device for motor vehicles
DE202010018458U1 (en) 2009-04-24 2016-10-26 Valeo Vision Optical device for motor vehicles
EP3045807A1 (en) 2009-04-24 2016-07-20 Valeo Vision Optical device for motor vehicle
US8459849B2 (en) 2009-04-24 2013-06-11 Valeo Vision Optical device for a motor vehicle
DE202010018337U1 (en) 2009-04-24 2015-09-14 Valeo Vision Optical device for motor vehicles
DE202010018335U1 (en) 2009-04-24 2015-09-14 Valeo Vision Optical device for motor vehicles
EP2354647A2 (en) 2010-02-02 2011-08-10 Valeo Vision Device for moving an element of a lighting and/or signalling device of an automobile and operating method for such a device
EP2366587A1 (en) 2010-03-05 2011-09-21 Valeo Vision Optical system for an automobile
US8770811B2 (en) 2010-04-12 2014-07-08 Valeo Vision Assembly for a lighting and/or signalling device of an automotive vehicle
EP2374659A2 (en) 2010-04-12 2011-10-12 Valeo Vision Anordnung für eine Beleuchtungs- und/oder Signalisierungsvorrichtung eines Kraftfahrzeugs

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US20020044451A1 (en) 2002-04-18
US6623149B2 (en) 2003-09-23
ES2317883T3 (en) 2009-05-01
FR2815310B1 (en) 2003-02-21
JP2002140909A (en) 2002-05-17
EP1197387B1 (en) 2009-01-14
DE60137390D1 (en) 2009-03-05

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