EP1944542A1 - Double-function headlight for an automobile - Google Patents

Double-function headlight for an automobile Download PDF

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Publication number
EP1944542A1
EP1944542A1 EP20080100290 EP08100290A EP1944542A1 EP 1944542 A1 EP1944542 A1 EP 1944542A1 EP 20080100290 EP20080100290 EP 20080100290 EP 08100290 A EP08100290 A EP 08100290A EP 1944542 A1 EP1944542 A1 EP 1944542A1
Authority
EP
European Patent Office
Prior art keywords
cover
lens
projector according
reflector
projector
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
EP20080100290
Other languages
German (de)
French (fr)
Other versions
EP1944542B1 (en
Inventor
Jean-Luc Meyrenaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1944542A1 publication Critical patent/EP1944542A1/en
Application granted granted Critical
Publication of EP1944542B1 publication Critical patent/EP1944542B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—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
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • F21S41/172—High-intensity discharge light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions

Definitions

  • the invention relates to a bifunctional light projector for a motor vehicle for providing a first function corresponding to a beam with cutoff and a second function corresponding to a beam of the second type, in particular a road beam.
  • the invention aims, above all, to provide a bifunctional projector, in particular code / route which, with a halogen-type light source, gives a correct intensity and luminous flux especially for the road beam. It is also desirable that the Bifunction module stands out, by its principle and its style, current modules while remaining a relatively simple design.
  • the light projector cover of the kind defined above has a reflective surface which, in the erased position, is placed in the lower part of the reflector, is turned forward and contributes to the beam of the second type.
  • said cache is constituted by a complex surface portion of parabolic type.
  • the projector comprises in its lower part at least one fixed complex surface which occurs only when the cover is in the erased position, to contribute to the beam of second type according to rays which pass through the optics arranged in front of the reflector.
  • the projector advantageously comprises in its upper part, at least one complex surface arranged to reflect the rays above the contour of the optics and contribute to both the cut beam and the beam of the second type.
  • the cover can be retracted by rotation about a transverse horizontal axis, orthogonal to the optical axis.
  • the optics of the projector may be constituted by a convergent lens.
  • the lens may be mounted in a frame having radially projecting lugs for attachment to a housing while leaving free space for the passage of light rays between the contour of the lens and the contour of the housing.
  • the lens can be limited by two vertical rectilinear sides.
  • the control of the cache is advantageously provided by a stepping motor.
  • the control of the stepper motor may comprise a so-called "highway" function in which the cut line of the code beam is raised a few tenths of degrees, in particular between two and six tenths of degrees, with respect to an ordinary code beam.
  • the projector may include a city lamp installed at the bottom in the free space between the contour of the lens and the contour of the housing.
  • the projector cover can be positioned according to at least one intermediate position located between said active position and said erased position, thus making it possible to generate a beam with a higher cutoff than the cutoff of the beam generated when the cover is in said active position.
  • the evolution of the cache from one position to another is performed by a stepping motor.
  • a light projector P for a motor vehicle provided to provide a dual function, one of which corresponds to a beam with cutoff, namely a beam code, and whose other function corresponds to a beam of a second type, namely a road beam.
  • the projector P comprises a reflector 1 in the form of an ellipsoid, or more exactly constituted by a continuous or discontinuous series of surfaces, each of the vertical generatrices of which is close to an ellipse, and designated by simplification in the description and claims by "elliptical reflector".
  • the optical axis AA of the reflector is substantially horizontal, parallel to the longitudinal direction of the vehicle.
  • the elliptical reflector 1 comprises a main part 1a situated above the horizontal plane passing through the optical axis AA and a part 1b situated below the horizontal plane whose forward extension is smaller than that of the part 1a.
  • the terms "before” and “backward” are to be considered according to the direction of propagation of the light rays which are reflected towards the front.
  • the reflector 1 has an internal focus Fi and an external focus Fe on the optical axis A-A.
  • a light source S diagrammatically represented by a point, is placed at the inner focus Fi, or in its vicinity.
  • the light source S can be a xenon lamp.
  • An optics, formed by a convergent lens L, is arranged in front of the reflector 1. The focal point of the lens L is coincident with, or adjacent to, the external focus Fe of the reflector 1.
  • a retractable cover M is provided to occupy an active position, illustrated on Fig. 1 and 3 , for a cut-off beam, or an erased position illustrated on Fig. 2 and 4 , for a road beam.
  • the cover M is rotatably mounted about a transverse axis 2 ( Fig.3 ), orthogonal to the optical axis AA, located lower than this optical axis, and in front of the focus Fi.
  • a transverse axis 2 Fig.3
  • its upper edge Mh is located in the vicinity of the focus of the lens L and the external focus Fe, and constitutes the cutoff edge of the beam whose general orientation is substantially orthogonal to the optical axis AA, in a horizontal plane.
  • the retractable cover M is constituted by a complex surface portion of parabolic, reflecting type which, in the erased position ( Fig. 2 and 4 ) is placed in the lower part of the reflector 1.
  • complex surface or “parabolic complex surface” used in the description and claims is meant a reflective surface generally composed of several facets whose surfaces have generators, in particular vertical, close to parabolas.
  • complex surface of parabolic type occupies the position where it contributes to the beam, especially when the cover M is in the erased position, the focal points of each facet are close to or coincide with the lower focus Fi of the reflector 1.
  • the projector also comprises, in its lower part, at least one and preferably several complex reflective surfaces 3a, 3b, 3c fixed with respect to the reflector 1, which intervene when the cover M is in the erased position ( Fig. 4 ) to contribute to the road beam.
  • the lower complex surfaces 3a, 3b, 3c have their focus located in the vicinity of the focus Fi or confused with this focus.
  • the lens L is held by a frame 5 ( Fig.1 ) which has three tabs 6 projecting radially to ensure attachment to the housing while leaving the space 4 free.
  • the reflective assembly formed by the reflector 1, and the complex surfaces 3a, 3b, 3c, has in the lower part a notch in which is housed the cover M in the erased position.
  • the reflective surface of the cover M is oriented forwards, in this erased position, to contribute to the road beam.
  • the complex surface of the cache M completes that of the complex surfaces 3a, 3b, 3c.
  • the projector P may comprise, in its upper part, at least one complex reflecting surface 7, as illustrated on Fig. 2 whose front edge is at a radial distance from the upper part of the lens.
  • the focal point of the complex surface 7 coincides with or near the lower focus Fi of the reflector 1.
  • the surface 7 makes it possible to reflect above the lens L the rays which contribute to the coded beam and to the driving beam, which the cache M is in the active or erased position.
  • the front view lens L has a contour formed by an upper circular arc, a lower arc and, on each side, by vertical rectilinear edges.
  • a city lamp V can be installed below the lens L, in the annular space 4, in an opening in the reflector 4.
  • the control of the cache M is advantageously provided by a stepper motor (not shown) and allows a "motorway" function ("motorway") according to which the breaking line of the code beam is raised a few tenths of degrees, especially between two and six tenths of degrees, from the cut line of the ordinary code.
  • This displacement of the cutoff line is obtained by a determined number of engine steps to lower the upper edge Mh cutoff, when the cache M is in the active position, causing a rise in the cutoff line of the beam.
  • the Figures 5a to 5e represent the modulation of the beam 10 of the projector according to the present invention obtained by an embodiment with stepper motor.
  • the figure 5a represents an ordinary code beam for a traffic on the right obtained when the cache M is in the active position.
  • This ordinary code beam comprises a cut-off line 11, comprising a substantially horizontal portion 13, making it possible not to dazzle the drivers of vehicles crossing or ahead of the vehicle equipped with the headlight according to the present invention, and an oblique portion 12, allowing illumination of the right aisle.
  • the figure 5e represents a road beam obtained when the cache M is in the erased position.
  • the cover will have one or more intermediate positions between the active position and the erased position.
  • the Figures 5b to 5d represent the shape of the beam obtained for three intermediate positions.
  • the cover M evolves from its active position to a first intermediate position at an angle of 4 degrees, the beam thus evolving a code-type beam ( figure 5a ) a "motorway" cut-off beam ( figure 5b ) in which the cut-off line 11 has been raised, not only at the oblique cut-off 12, but also at the substantially horizontal cut-off portion situated to the left of this oblique cut-off 12. It is also possible to position the cover M in changing it by 8 degrees relative to its active position, to make the beam 10 evolve towards a shape as represented in FIG. figure 5c , also corresponding to a beam of the "motorway” type but whose cutoff 11 is higher compared to the figure 5b .
  • the cover M To further increase the cutoff 11, it is possible to bring the cover M into a third intermediate position, in which the cover has evolved 10 degrees relative to its active position; we then obtain the beam represented in figure 5d .
  • the evolution of the beam can also be done by moving from the erased position to the active position, by choosing one of the positions of the cache M according to the beam to be obtained.
  • the number of intermediate positions may vary depending on the embodiments.
  • the angle of variation between the active position and an intermediate position is given as an example.
  • the examples represent cuts for right-hand traffic, but the embodiment is transposable to traffic on the left. In the case of a traffic on the left, the cuts represented will be reversed compared to those for traffic on the right according to a symmetry with respect to the vertical axis represented in figure 5a to 5e .
  • the amplitude of the rotation of the cache M between the active position for code and the road position may be of the order of 80 °.
  • the operation of the projector is as follows.
  • the first function corresponding to the code beam is obtained with the cache M in the active position illustrated on Fig. 1 or 3 , the source S being lit.
  • a radius i1 ( Fig.3 ) from the source S and falling on the upper part of the elliptical reflector 1 is reflected along a radius r1 passing through the external focus Fe, or in the vicinity of this focus.
  • the ray r1 moves downwards and, after having crossed the lens L, leaves parallel to the optical axis AA or with a slope towards the low.
  • a ray i2 coming from the source and falling on the upper part of the reflector 1 is reflected in r2 directed downwards. At the exit of the lens L this ray will remain inclined downwards.
  • a ray i3 from the source S and directed downward is reflected, by the lower part 1b of the elliptical reflector, into a radius r3 directed upwards, which touches the upper edge Mh of the cache.
  • the rays reflected by the lower part 1b of the reflector, and which would cut the optical axis AA forward of the focus of the lens, are intercepted by the cover M so that they can not create parasitic rays coming out of the lens L in an upward direction and which would pass above the desired cutoff line for the beam.
  • the second road function is obtained by controlling the folding of the cover M forwardly, in a rotation of about 80 ° about the axis 2.
  • the M folded cover is part of a notch provided in the lower part of the elliptical reflector 1 and complex surfaces 3a, 3b, 3c.
  • the concave reflecting surface of the mask M completes the reflective lower complex surface 3a, 3b, 3c of the projector P.
  • a ray such as i4 directed downward falls on the concave reflecting surface of the mask M and is reflected along a ray r4 which also passes through the lens.
  • the luminous flux obtained in the road position is increased compared with that obtained with a simple elliptical reflector comprising a retractable cover.
  • the invention makes it possible to obtain a bi-halogen module having a correct road flow and which, by its principle and its style, differs from the current modules.
  • the projector according to the invention provides, for the road beam, an increase of nearly 25% of the flux relative to a conventional bi-halogen.
  • the positioning of the mobile mirror formed by the mask M is not very detrimental because its most important function is to recover the flux for the road beam, mainly to give more comfort than traditional bi-halogen modules.
  • the projector according to the invention has great flexibility to create the distribution of the light flux of the road beam according to the definition of complex surfaces, while in a traditional module, by the tilting of the cache, it releases the occult light that comes s add to that of the passing beam.

Abstract

The headlamp (P) has a convergent lens (L) including a focal point merged with or next to an exterior focal point (Fe) of an elliptical reflector (1). A retractable shade (M) occupies active and withdrawn positions for dipped and full beams respectively. The shade presents, in the active position, a cut-off edge near the point of the lens. The shade is formed by parabolic complex surfaces (3a-3c) that present reflecting surfaces in the withdrawn position. The reflecting surfaces are turned forward and contribute to the full beam. The shade is placed in a lower part (1b) of the reflector.

Description

L'invention est relative à un projecteur lumineux bifonction pour véhicule automobile permettant d'assurer une première fonction correspondant à un faisceau avec coupure et une deuxième fonction correspondant à un faisceau de deuxième type, en particulier un faisceau route.The invention relates to a bifunctional light projector for a motor vehicle for providing a first function corresponding to a beam with cutoff and a second function corresponding to a beam of the second type, in particular a road beam.

Les projecteurs lumineux concernés par l'invention sont du genre de ceux qui comprennent :

  • un réflecteur elliptique ayant un foyer intérieur et un foyer extérieur sur un axe optique,
  • une source lumineuse placée au voisinage du foyer intérieur,
  • une optique disposée en avant du réflecteur et ayant un foyer confondu avec le, ou voisin du, foyer extérieur du réflecteur,
  • et un cache escamotable pouvant occuper une position active pour le faisceau à coupure, et une position effacée pour le faisceau de deuxième type, le cache en position active présentant un bord de coupure situé au voisinage du foyer de la lentille.
The luminous projectors concerned by the invention are of the type that include:
  • an elliptical reflector having an internal focus and an external focus on an optical axis,
  • a light source placed in the vicinity of the interior fireplace,
  • an optical element disposed in front of the reflector and having a focal point coinciding with, or adjacent to, the external focus of the reflector,
  • and a retractable cover that can occupy an active position for the cut-off beam, and an erased position for the second-type beam, the active-position cover having a cutoff edge located in the vicinity of the focus of the lens.

L'invention a pour but, surtout, de fournir un projecteur bifonction, en particulier code/route qui, avec une source de lumière de type halogène, donne une intensité et un flux lumineux corrects en particulier pour le faisceau route. Il est souhaitable également que le module bifonction se démarque, par son principe et son style, des modules actuels tout en restant d'une conception relativement simple.The invention aims, above all, to provide a bifunctional projector, in particular code / route which, with a halogen-type light source, gives a correct intensity and luminous flux especially for the road beam. It is also desirable that the Bifunction module stands out, by its principle and its style, current modules while remaining a relatively simple design.

Selon l'invention, le cache du projecteur lumineux du genre défini précédemment présente une surface réfléchissante qui, en position effacée, se place en partie inférieure du réflecteur, est tournée vers l'avant et contribue au faisceau de deuxième type. Préférentiellement, ledit cache est constitué par une partie de surface complexe de type parabolique.According to the invention, the light projector cover of the kind defined above has a reflective surface which, in the erased position, is placed in the lower part of the reflector, is turned forward and contributes to the beam of the second type. Preferably, said cache is constituted by a complex surface portion of parabolic type.

De préférence, le projecteur comporte dans sa partie basse au moins une surface complexe fixe qui intervient seulement lorsque le cache est en position effacée, pour contribuer au faisceau de deuxième type selon des rayons qui passent par l'optique disposée en avant du réflecteur.Preferably, the projector comprises in its lower part at least one fixed complex surface which occurs only when the cover is in the erased position, to contribute to the beam of second type according to rays which pass through the optics arranged in front of the reflector.

Le projecteur comporte avantageusement dans sa partie supérieure, au moins une surface complexe disposée pour réfléchir les rayons au-dessus du contour de l'optique et contribuer à la fois au faisceau à coupure et au faisceau de deuxième type.The projector advantageously comprises in its upper part, at least one complex surface arranged to reflect the rays above the contour of the optics and contribute to both the cut beam and the beam of the second type.

L'escamotage du cache peut s'effectuer par rotation autour d'un axe horizontal transversal, orthogonal à l'axe optique.The cover can be retracted by rotation about a transverse horizontal axis, orthogonal to the optical axis.

L'optique du projecteur peut être constituée par une lentille convergente. La lentille peut être montée dans un cadre comportant des pattes en saillie radiale permettant une fixation sur un boîtier tout en laissant libre un espace pour le passage des rayons lumineux entre le contour de la lentille et le contour du boîtier. La lentille peut être limitée par deux côtés rectilignes verticaux.The optics of the projector may be constituted by a convergent lens. The lens may be mounted in a frame having radially projecting lugs for attachment to a housing while leaving free space for the passage of light rays between the contour of the lens and the contour of the housing. The lens can be limited by two vertical rectilinear sides.

La commande du cache est assurée avantageusement par un moteur pas à pas. La commande du moteur pas à pas peut comporter une fonction dite « autoroute » selon laquelle la ligne de coupure du faisceau code est remontée de quelques dixièmes de degrés, en particulier entre deux et six dixièmes de degrés, par rapport à un faisceau code ordinaire.The control of the cache is advantageously provided by a stepping motor. The control of the stepper motor may comprise a so-called "highway" function in which the cut line of the code beam is raised a few tenths of degrees, in particular between two and six tenths of degrees, with respect to an ordinary code beam.

Le projecteur peut comporter une lampe de ville installée en partie basse dans l'espace libre entre le contour de la lentille et le contour du boîtier.The projector may include a city lamp installed at the bottom in the free space between the contour of the lens and the contour of the housing.

Selon une variante de réalisation, le cache du projecteur peut être positionné selon au moins une position intermédiaire située entre ladite position active et ladite position effacée, permettant ainsi de générer un faisceau avec une coupure plus élevée que la coupure du faisceau générée lorsque le cache est dans ladite position active. Préférentiellement, l'évolution du cache d'une position vers une autre est effectuée par un moteur pas à pas.According to an alternative embodiment, the projector cover can be positioned according to at least one intermediate position located between said active position and said erased position, thus making it possible to generate a beam with a higher cutoff than the cutoff of the beam generated when the cover is in said active position. Preferably, the evolution of the cache from one position to another is performed by a stepping motor.

L'invention consiste, mises à part les dispositions exposées ci-dessus, en un certain nombre d'autres dispositions dont il sera plus explicitement question ci-après à propos d'un exemple de réalisation décrit avec référence aux dessins annexés, mais qui n'est nullement limitatif. Sur ces dessins :

  • Fig. 1 est une vue schématique de côté en perspective d'un projecteur selon l'invention en configuration code, le cache étant en position active.
  • Fig. 2 est une vue schématique de l'avant en perspective d'un projecteur selon l'invention en configuration route, le cache étant en position effacée.
  • Fig. 3 est une coupe verticale schématique passant par l'axe optique du projecteur avec le cache en position active, pour un faisceau code, et
  • Fig. 4 est une coupe verticale semblable à Fig. 3 du projecteur avec le cache en position effacée pour un faisceau route.
  • Fig. 5a à 5e représentent la modulation du faisceau du projecteur selon une variante de réalisation de la présente invention.
The invention consists, apart from the arrangements set out above, in a number of other arrangements which will be more explicitly discussed below with respect to an embodiment described with reference to the accompanying drawings, but which is in no way limiting. On these drawings:
  • Fig. 1 is a schematic perspective side view of a projector according to the invention in code configuration, the cache being in the active position.
  • Fig. 2 is a schematic view of the front perspective of a projector according to the invention in road configuration, the cache being in the erased position.
  • Fig. 3 is a schematic vertical section through the optical axis of the headlamp with the cache in the active position, for a code beam, and
  • Fig. 4 is a vertical section similar to Fig. 3 the projector with the cover in the erased position for a road beam.
  • Fig. 5a to 5e represent the modulation of the beam of the projector according to an alternative embodiment of the present invention.

En se reportant à Fig. 1 et 2 des dessins, on peut voir un projecteur lumineux P pour véhicule automobile, prévu pour assurer une double fonction dont l'une correspond à un faisceau avec coupure, à savoir un faisceau code, et dont l'autre fonction correspond à un faisceau d'un deuxième type, à savoir un faisceau route.Referring to Fig. 1 and 2 drawings, we can see a light projector P for a motor vehicle, provided to provide a dual function, one of which corresponds to a beam with cutoff, namely a beam code, and whose other function corresponds to a beam of a second type, namely a road beam.

Le projecteur P comprend un réflecteur 1 en forme d'ellipsoïde, ou plus exactement constitué par une suite continue ou discontinue de surfaces dont chacune des génératrices verticales est proche d'une ellipse, et désigné par simplification dans la description et les revendications par « réflecteur elliptique ». Lorsque le projecteur P est installé sur le véhicule, l'axe optique A-A du réflecteur est sensiblement horizontal, parallèle à la direction longitudinale du véhicule. Le réflecteur elliptique 1 comporte une partie principale 1a située au-dessus du plan horizontal passant par l'axe optique A-A et une partie 1 b située au-dessous du plan horizontal dont l'étendue vers l'avant est plus faible que celle de la partie 1a. Les termes "avant" et "arrière" sont à considérer suivant le sens de propagation des rayons lumineux qui sont réfléchis vers l'avant.The projector P comprises a reflector 1 in the form of an ellipsoid, or more exactly constituted by a continuous or discontinuous series of surfaces, each of the vertical generatrices of which is close to an ellipse, and designated by simplification in the description and claims by "elliptical reflector". When the projector P is installed on the vehicle, the optical axis AA of the reflector is substantially horizontal, parallel to the longitudinal direction of the vehicle. The elliptical reflector 1 comprises a main part 1a situated above the horizontal plane passing through the optical axis AA and a part 1b situated below the horizontal plane whose forward extension is smaller than that of the part 1a. The terms "before" and "backward" are to be considered according to the direction of propagation of the light rays which are reflected towards the front.

Le réflecteur 1 comporte un foyer intérieur Fi et un foyer extérieur Fe sur l'axe optique A-A. Une source lumineuse S, représentée schématiquement par un point, est placée au foyer intérieur Fi, ou à son voisinage. La source lumineuse S peut être une lampe à xénon. Une optique, formée par une lentille convergente L, est disposée en avant du réflecteur 1. Le foyer de la lentille L est confondu avec le, ou voisin du, foyer extérieur Fe du réflecteur 1.The reflector 1 has an internal focus Fi and an external focus Fe on the optical axis A-A. A light source S, diagrammatically represented by a point, is placed at the inner focus Fi, or in its vicinity. The light source S can be a xenon lamp. An optics, formed by a convergent lens L, is arranged in front of the reflector 1. The focal point of the lens L is coincident with, or adjacent to, the external focus Fe of the reflector 1.

Un cache escamotable M est prévu pour occuper une position active, illustrée sur Fig. 1 et 3, pour un faisceau code à coupure, ou une position effacée illustrée sur Fig. 2 et 4, pour un faisceau route.A retractable cover M is provided to occupy an active position, illustrated on Fig. 1 and 3 , for a cut-off beam, or an erased position illustrated on Fig. 2 and 4 , for a road beam.

Le cache M est monté rotatif autour d'un axe transversal 2 (Fig.3), orthogonal à l'axe optique A-A, situé plus bas que cet axe optique, et en avant du foyer Fi. Lorsque le cache M est en position active, son bord supérieur Mh est situé au voisinage du foyer de la lentille L et du foyer extérieur Fe, et constitue le bord de coupure du faisceau dont l'orientation générale est sensiblement orthogonale à l'axe optique A-A, dans un plan horizontal.The cover M is rotatably mounted about a transverse axis 2 ( Fig.3 ), orthogonal to the optical axis AA, located lower than this optical axis, and in front of the focus Fi. When the cover M is in the active position, its upper edge Mh is located in the vicinity of the focus of the lens L and the external focus Fe, and constitutes the cutoff edge of the beam whose general orientation is substantially orthogonal to the optical axis AA, in a horizontal plane.

Selon l'invention, le cache escamotable M est constitué par une partie de surface complexe de type parabolique, réfléchissante qui, en position effacée (Fig. 2 et 4) se place en partie inférieure du réflecteur 1.According to the invention, the retractable cover M is constituted by a complex surface portion of parabolic, reflecting type which, in the erased position ( Fig. 2 and 4 ) is placed in the lower part of the reflector 1.

Par l'expression « surface complexe » ou « surface complexe de type parabolique » utilisée dans la description et les revendications on désigne une surface réfléchissante composée généralement de plusieurs facettes dont les surfaces ont des génératrices, en particulier verticales, proches de paraboles. Lorsque la surface complexe de type parabolique occupe la position où elle contribue au faisceau, notamment lorsque le cache M est en position effacée, les foyers de chaque facette sont voisins du, ou confondus avec, le foyer inférieur Fi du réflecteur 1.By the term "complex surface" or "parabolic complex surface" used in the description and claims is meant a reflective surface generally composed of several facets whose surfaces have generators, in particular vertical, close to parabolas. When the complex surface of parabolic type occupies the position where it contributes to the beam, especially when the cover M is in the erased position, the focal points of each facet are close to or coincide with the lower focus Fi of the reflector 1.

Le projecteur comporte également, dans sa partie basse, au moins une et de préférence plusieurs surfaces réfléchissantes complexes 3a, 3b, 3c, fixes par rapport au réflecteur 1, qui interviennent lorsque le cache M est en position effacée (Fig. 4) pour contribuer au faisceau route. Les surfaces complexes 3a, 3b, 3c inférieures ont leur foyer situé au voisinage du foyer Fi ou confondu avec ce foyer.The projector also comprises, in its lower part, at least one and preferably several complex reflective surfaces 3a, 3b, 3c fixed with respect to the reflector 1, which intervene when the cover M is in the erased position ( Fig. 4 ) to contribute to the road beam. The lower complex surfaces 3a, 3b, 3c have their focus located in the vicinity of the focus Fi or confused with this focus.

Les rayons tels que r5 (Fig. 4) réfléchis par les surfaces complexes 3a, 3b, 3c inférieures, parallèles à l'axe optique A-A, passent au-dessous ou sur les côtés de la lentille L dans un espace annulaire 4 qui est prévu autour de la lentille entre le contour de la lentille et un boîtier (non représenté) contenant le projecteur. La lentille L est maintenue par un cadre 5 (Fig.1) qui comporte trois pattes 6 en saillie radiale pour assurer une fixation sur le boîtier tout en laissant libre l'espace 4.The rays such as r5 ( Fig. 4 ) reflected by the complex surfaces 3a, 3b, 3c lower, parallel to the optical axis AA, pass below or on the sides of the lens L in an annular space 4 which is provided around the lens between the contour of the lens and a housing (not shown) containing the projector. The lens L is held by a frame 5 ( Fig.1 ) which has three tabs 6 projecting radially to ensure attachment to the housing while leaving the space 4 free.

L'ensemble réfléchissant formé par le réflecteur 1, et les surfaces complexes 3a, 3b, 3c, comporte en partie inférieure une échancrure dans laquelle se loge le cache M en position effacée. La surface réfléchissante du cache M est orientée vers l'avant, dans cette position effacée, pour contribuer au faisceau route. La surface complexe du cache M complète celle des surfaces complexes 3a, 3b, 3c.The reflective assembly formed by the reflector 1, and the complex surfaces 3a, 3b, 3c, has in the lower part a notch in which is housed the cover M in the erased position. The reflective surface of the cover M is oriented forwards, in this erased position, to contribute to the road beam. The complex surface of the cache M completes that of the complex surfaces 3a, 3b, 3c.

Le projecteur P peut comporter, dans sa partie supérieure, au moins une surface réfléchissante complexe 7, comme illustré sur Fig. 2, dont le bord avant est à distance radiale de la partie supérieure de la lentille. Le foyer de la surface complexe 7 est confondu avec le, ou voisin du, foyer inférieur Fi du réflecteur 1. La surface 7 permet de réfléchir au-dessus de la lentille L des rayons qui contribuent au faisceau code et au faisceau route, que le cache M soit en position active ou effacée.The projector P may comprise, in its upper part, at least one complex reflecting surface 7, as illustrated on Fig. 2 whose front edge is at a radial distance from the upper part of the lens. The focal point of the complex surface 7 coincides with or near the lower focus Fi of the reflector 1. The surface 7 makes it possible to reflect above the lens L the rays which contribute to the coded beam and to the driving beam, which the cache M is in the active or erased position.

La lentille L vue de face présente un contour formé par un arc de cercle supérieur, un arc de cercle inférieur et, de chaque côté, par des bords rectilignes verticaux.The front view lens L has a contour formed by an upper circular arc, a lower arc and, on each side, by vertical rectilinear edges.

Une lampe de ville V peut être installée au-dessous de la lentille L, dans l'espace annulaire 4, dans une ouverture pratiquée dans le réflecteur 4.A city lamp V can be installed below the lens L, in the annular space 4, in an opening in the reflector 4.

La commande du cache M est avantageusement assurée par un moteur pas à pas (non représenté) et permet une fonction « autoroute » ("motorway") selon laquelle la ligne de coupure du faisceau code est remontée de quelques dixièmes de degrés, notamment entre deux et six dixièmes de degrés, par rapport à la ligne de coupure du code ordinaire. Ce déplacement de la ligne de coupure est obtenu par un nombre déterminé de pas du moteur pour abaisser le bord supérieur Mh de coupure, lorsque le cache M est en position active, ce qui provoque une remontée de la ligne de coupure du faisceau.The control of the cache M is advantageously provided by a stepper motor (not shown) and allows a "motorway" function ("motorway") according to which the breaking line of the code beam is raised a few tenths of degrees, especially between two and six tenths of degrees, from the cut line of the ordinary code. This displacement of the cutoff line is obtained by a determined number of engine steps to lower the upper edge Mh cutoff, when the cache M is in the active position, causing a rise in the cutoff line of the beam.

Les figures 5a à 5e représentent la modulation du faisceau 10 du projecteur selon la présente invention obtenue par un mode de réalisation avec moteur pas à pas. La figure 5a représente un faisceau code ordinaire pour un trafic à droite obtenu lorsque le cache M est en position active. Ce faisceau code ordinaire comprend une ligne de coupure 11, comportant une portion sensiblement horizontale 13, permettant de ne pas éblouir les conducteurs de véhicules croisant ou devançant le véhicule équipé du projecteur selon la présente invention, et une portion oblique 12, permettant un éclairage du bas-côté droit. La figure 5e représente un faisceau route obtenu lorsque le cache M est en position effacée. Il est à noter que dans un mode de réalisation sans moteur pas à pas, avec seulement deux positions du cache, la position active et la position effacée, on obtient deux types de forme de faisceau code et route, tels que par exemple ceux représentés en figures 5a et 5e. Dans le mode de réalisation avec moteur pas à pas, le cache va avoir une ou plusieurs positions intermédiaires entre la position active et la position effacée. A titre illustratif, les figures 5b à 5d représentent la forme du faisceau obtenue pour trois positions intermédiaires. Ainsi, dans cet exemple, le cache M évolue de sa position active à une première position intermédiaire selon un angle de 4 degrés, le faisceau évoluant ainsi d'un faisceau de type code (figure 5a) à un faisceau à coupure de type « motorway » (figure 5b) dans lequel la ligne de coupure 11 a été relevée, non seulement au niveau de la coupure oblique 12, mais également de la portion de coupure sensiblement horizontale située à gauche de cette coupure oblique 12. Il est également possible de positionner le cache M en le faisant évoluer de 8 degrés par rapport à sa position active, pour faire évoluer le faisceau 10 vers une forme telle que représentée en figure 5c, correspondant également à un faisceau de type « motorway » mais dont la coupure 11 est davantage relevée comparé à la figure 5b. Pour relever davantage la coupure 11, on peut amener le cache M dans une troisième position intermédiaire, dans laquelle le cache a évolué de 10 degrés par rapport à sa position active ; on obtient alors le faisceau représenté en figure 5d. Bien entendu, l'évolution du faisceau peut se faire également en évoluant de la position effacée vers la position active, en choisissant l'une des positions du cache M selon le faisceau devant être obtenu. Le nombre de positions intermédiaires peut-être variable selon les modes de réalisation. Egalement, l'angle de variation entre la position active et une position intermédiaire est cité à titre d'exemple. Pareillement, les exemples représentent des coupures pour trafic à droite, mais le mode de réalisation est transposable à un trafic à gauche. Dans le cas d'un trafic à gauche, les coupures représentées seront inversées par rapport à celles pour trafic à droite selon une symétrie par rapport à l'axe vertical représenté en figure 5a à 5e.The Figures 5a to 5e represent the modulation of the beam 10 of the projector according to the present invention obtained by an embodiment with stepper motor. The figure 5a represents an ordinary code beam for a traffic on the right obtained when the cache M is in the active position. This ordinary code beam comprises a cut-off line 11, comprising a substantially horizontal portion 13, making it possible not to dazzle the drivers of vehicles crossing or ahead of the vehicle equipped with the headlight according to the present invention, and an oblique portion 12, allowing illumination of the right aisle. The figure 5e represents a road beam obtained when the cache M is in the erased position. It should be noted that in one embodiment without stepping motor, with only two positions of the cache, the active position and the erased position, two types of code and road beam shapes are obtained, such as for example those represented in FIG. figures 5a and 5th . In the embodiment with stepper motor, the cover will have one or more intermediate positions between the active position and the erased position. As an illustration, the Figures 5b to 5d represent the shape of the beam obtained for three intermediate positions. Thus, in this example, the cover M evolves from its active position to a first intermediate position at an angle of 4 degrees, the beam thus evolving a code-type beam ( figure 5a ) a "motorway" cut-off beam ( figure 5b ) in which the cut-off line 11 has been raised, not only at the oblique cut-off 12, but also at the substantially horizontal cut-off portion situated to the left of this oblique cut-off 12. It is also possible to position the cover M in changing it by 8 degrees relative to its active position, to make the beam 10 evolve towards a shape as represented in FIG. figure 5c , also corresponding to a beam of the "motorway" type but whose cutoff 11 is higher compared to the figure 5b . To further increase the cutoff 11, it is possible to bring the cover M into a third intermediate position, in which the cover has evolved 10 degrees relative to its active position; we then obtain the beam represented in figure 5d . Of course, the evolution of the beam can also be done by moving from the erased position to the active position, by choosing one of the positions of the cache M according to the beam to be obtained. The number of intermediate positions may vary depending on the embodiments. Also, the angle of variation between the active position and an intermediate position is given as an example. Similarly, the examples represent cuts for right-hand traffic, but the embodiment is transposable to traffic on the left. In the case of a traffic on the left, the cuts represented will be reversed compared to those for traffic on the right according to a symmetry with respect to the vertical axis represented in figure 5a to 5e .

L'amplitude de la rotation du cache M entre la position active pour code et la position route peut être de l'ordre de 80°.The amplitude of the rotation of the cache M between the active position for code and the road position may be of the order of 80 °.

Le fonctionnement du projecteur est le suivant.The operation of the projector is as follows.

La première fonction correspondant au faisceau code est obtenue avec le cache M en position active illustrée sur Fig. 1 ou 3, la source S étant allumée. Un rayon i1 (Fig.3) provenant de la source S et tombant sur la partie supérieure du réflecteur elliptique 1 est réfléchi suivant un rayon r1 passant par le foyer externe Fe, ou au voisinage de ce foyer. Le rayon r1 se dirige vers le bas et, après avoir traversé la lentille L, sort parallèlement à l'axe optique A-A ou avec une inclinaison vers le bas.The first function corresponding to the code beam is obtained with the cache M in the active position illustrated on Fig. 1 or 3 , the source S being lit. A radius i1 ( Fig.3 ) from the source S and falling on the upper part of the elliptical reflector 1 is reflected along a radius r1 passing through the external focus Fe, or in the vicinity of this focus. The ray r1 moves downwards and, after having crossed the lens L, leaves parallel to the optical axis AA or with a slope towards the low.

Un rayon i2 provenant de la source et tombant sur la partie supérieure du réflecteur 1 est réfléchi en r2 dirigé vers le bas. A la sortie de la lentille L ce rayon restera incliné vers le bas.A ray i2 coming from the source and falling on the upper part of the reflector 1 is reflected in r2 directed downwards. At the exit of the lens L this ray will remain inclined downwards.

Un rayon i3 provenant de la source S et dirigé vers le bas est réfléchi, par la partie inférieure 1 b du réflecteur elliptique, en un rayon r3 dirigé vers le haut, qui effleure le bord supérieur Mh du cache. Ce rayon r3, après avoir traversé la lentille L, sort parallèle à l'axe optique A-A s'il passe par le foyer de la lentille, ou réfracté suivant une direction descendante si ce rayon r3 coupe l'axe optique A-A en arrière du foyer de la lentille.A ray i3 from the source S and directed downward is reflected, by the lower part 1b of the elliptical reflector, into a radius r3 directed upwards, which touches the upper edge Mh of the cache. This ray r3, after passing through the lens L, leaves parallel to the optical axis AA if it passes through the focus of the lens, or refracted in a downward direction if this ray r3 intersects the optical axis AA behind the focus of the lens.

Les rayons réfléchis par la partie inférieure 1 b du réflecteur, et qui viendraient couper l'axe optique A-A en avant du foyer de la lentille, sont interceptés par le cache M de sorte qu'ils ne peuvent créer de rayons parasites sortant de la lentille L suivant une direction ascendante et qui passeraient au-dessus de la ligne de coupure souhaitée pour le faisceau.The rays reflected by the lower part 1b of the reflector, and which would cut the optical axis AA forward of the focus of the lens, are intercepted by the cover M so that they can not create parasitic rays coming out of the lens L in an upward direction and which would pass above the desired cutoff line for the beam.

La deuxième fonction route est obtenue en commandant le rabattement du cache M vers l'avant, selon une rotation d'environ 80° autour de l'axe 2. Le cache M rabattu vient s'inscrire dans une échancrure prévue dans la partie inférieure du réflecteur elliptique 1 et les surfaces complexes 3a, 3b, 3c.The second road function is obtained by controlling the folding of the cover M forwardly, in a rotation of about 80 ° about the axis 2. The M folded cover is part of a notch provided in the lower part of the elliptical reflector 1 and complex surfaces 3a, 3b, 3c.

La surface concave réfléchissante du cache M complète la surface complexe inférieure réfléchissante 3a, 3b, 3c du projecteur P.The concave reflecting surface of the mask M completes the reflective lower complex surface 3a, 3b, 3c of the projector P.

On retrouve les rayons i2, i3 réfléchis par les parties elliptiques 1a, 1 b suivant des rayons r2, r3 qui passent par la lentille L.We find the rays i2, i3 reflected by the elliptical parts 1a, 1b along r2, r3 rays which pass through the lens L.

Un rayon tel que i4 dirigé vers le bas tombe sur la surface concave réfléchissante du cache M et est réfléchi suivant un rayon r4 qui passe également par la lentille.A ray such as i4 directed downward falls on the concave reflecting surface of the mask M and is reflected along a ray r4 which also passes through the lens.

Un rayon tel que i5 provenant de la source tombe sur l'une des surfaces complexes inférieures 3a, 3b, 3c et est réfléchi suivant le rayon r5 qui est sensiblement parallèle à l'axe optique A-A et passe au-dessous de la lentille L sans être réfracté.A ray such that i5 from the source falls on one of the lower complex surfaces 3a, 3b, 3c and is reflected along the radius r5 which is substantially parallel to the optical axis AA and passes below the lens L without to be refracted.

Le flux lumineux obtenu en position route est augmenté par rapport à celui obtenu avec un simple réflecteur elliptique comportant un cache escamotable.The luminous flux obtained in the road position is increased compared with that obtained with a simple elliptical reflector comprising a retractable cover.

Lorsque la source lumineuse S est constituée par une lampe halogène, l'invention permet d'obtenir un module bi-halogène ayant un flux route correct et qui, par son principe et son style, se démarque des modules actuels. Le projecteur selon l'invention procure, pour le faisceau route, une augmentation de près de 25% du flux par rapport à un bi-halogène classique.When the light source S is constituted by a halogen lamp, the invention makes it possible to obtain a bi-halogen module having a correct road flow and which, by its principle and its style, differs from the current modules. The projector according to the invention provides, for the road beam, an increase of nearly 25% of the flux relative to a conventional bi-halogen.

Le positionnement du miroir mobile formé par le cache M est peu préjudiciable car sa fonction la plus importante est de récupérer du flux pour le faisceau route, principalement pour donner plus de confort que les modules bi-halogène traditionnels.The positioning of the mobile mirror formed by the mask M is not very detrimental because its most important function is to recover the flux for the road beam, mainly to give more comfort than traditional bi-halogen modules.

Le projecteur conforme à l'invention présente une grande souplesse pour créer la répartition du flux lumineux du faisceau route selon la définition des surfaces complexes, alors que dans un module traditionnel, par le basculement du cache, on libère de la lumière occultée qui vient s'ajouter à celle du faisceau de croisement.The projector according to the invention has great flexibility to create the distribution of the light flux of the road beam according to the definition of complex surfaces, while in a traditional module, by the tilting of the cache, it releases the occult light that comes s add to that of the passing beam.

Claims (12)

Projecteur lumineux bifonction pour véhicule automobile permettant d'assurer une première fonction correspondant à un faisceau avec coupure, en particulier un faisceau code, et une deuxième fonction correspondant à un faisceau de deuxième type, en particulier un faisceau route, comprenant : - un réflecteur elliptique (1) ayant un foyer intérieur (Fi) et un foyer extérieur (Fe) sur un axe optique, - une source lumineuse (S) placée au voisinage du foyer intérieur (Fi), - une optique (L) disposée en avant du réflecteur et ayant un foyer confondu avec le, ou voisin du, foyer extérieur du réflecteur, - et un cache escamotable (M) pouvant occuper une position active pour le faisceau à coupure, et une position effacée pour le faisceau de deuxième type, le cache en position active présentant un bord de coupure (Mh) situé au voisinage du foyer de ladite optique, caractérisé en ce que le cache (M) présente une surface réfléchissante qui, en position effacée, se place en partie inférieure du réflecteur, est tournée vers l'avant et contribue au faisceau de deuxième type.Bifunctional light projector for a motor vehicle for providing a first function corresponding to a cut-off beam, in particular a coded beam, and a second function corresponding to a beam of the second type, in particular a road beam, comprising: an elliptical reflector (1) having an internal focus (Fi) and an external focus (Fe) on an optical axis, a light source (S) placed in the vicinity of the internal focus (Fi), an optic (L) disposed in front of the reflector and having a focal point coinciding with, or adjacent to, the external focus of the reflector, and a retractable cover (M) that can occupy an active position for the cut-off beam, and an erased position for the second-type beam, the active-position cache having a cut-off edge (Mh) situated in the vicinity of the focus of said beam; optical, characterized in that the cover (M) has a reflecting surface which, in the erased position, is located in the lower part of the reflector, is turned forward and contributes to the beam of the second type. Projecteur selon la revendication 1, caractérisé en ce que ledit cache est constitué par une partie de surface complexe de type parabolique.Headlight according to Claim 1, characterized in that said cover is constituted by a portion of parabolic type complex surface. Projecteur selon la revendication 1 ou 2, caractérisé en ce qu'il comporte dans sa partie basse au moins une surface complexe fixe (3a, 3b, 3c) qui intervient seulement lorsque le cache (M) est en position effacée, pour contribuer au faisceau de deuxième type selon des rayons qui passent par l'optique (L).Projector according to claim 1 or 2, characterized in that it comprises in its lower part at least one fixed complex surface (3a, 3b, 3c) which intervenes only when the cover (M) is in the erased position, to contribute to the beam of second type according to rays which pass through optics (L). Projecteur selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comporte dans sa partie supérieure, au moins une surface complexe (7) disposée pour réfléchir les rayons au-dessus du contour de l'optique et contribuer à la fois au faisceau à coupure et au faisceau de deuxième type.Projector according to any one of claims 1 to 3, characterized in that it comprises in its upper part, at least one complex surface (7) arranged to reflect the rays above the contour of the optics and contribute to the times to the cut-off beam and to the beam of the second type. Projecteur selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'escamotage du cache (M) s'effectue par rotation autour d'un axe horizontal transversal, orthogonal à l'axe optique (A-A).Projector according to any one of claims 1 to 4, characterized in that the retraction of the cover (M) is performed by rotation about a transverse horizontal axis, orthogonal to the optical axis (AA). Projecteur selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'optique du projecteur est constituée par une lentille convergente (L).Projector according to any one of claims 1 to 5, characterized in that the optical projector is constituted by a convergent lens (L). Projecteur selon la revendication 6, caractérisé en ce que la lentille (L) est montée dans un cadre (5) comportant des pattes (6) en saillie radiale permettant une fixation sur un boîtier tout en laissant libre un espace pour le passage des rayons lumineux entre le contour de la lentille (L) et le contour du boîtier.Projector according to claim 6, characterized in that the lens (L) is mounted in a frame (5) having tabs (6) radially projecting for attachment to a housing while leaving free space for the passage of light rays between the contour of the lens (L) and the contour of the case. Projecteur selon la revendication 6 ou 7, caractérisé en ce que la lentille est limitée par deux côtés rectilignes verticaux.Projector according to claim 6 or 7, characterized in that the lens is bounded by two vertical rectilinear sides. Projecteur selon l'une quelconque des revendications précédentes, caractérisé en ce que la commande du cache (M) est assurée par un moteur pas à pas.Projector according to any one of the preceding claims, characterized in that the control of the cover (M) is provided by a stepping motor. Projecteur selon la revendication 9, caractérisé en ce que la commande du moteur pas à pas comporte une fonction dite « autoroute » selon laquelle la ligne de coupure du faisceau code est remontée de quelques dixièmes de degrés, en particulier entre deux et six dixièmes de degrés, par rapport à un faisceau code ordinaire.Headlight according to claim 9, characterized in that the control of the stepper motor comprises a function called "highway" in which the cutoff line of the code beam is raised a few tenths of degrees, in particular between two and six tenths of degrees , compared to an ordinary code beam. Projecteur selon la revendication 7, caractérisé en ce qu'il comporte une lampe de ville (V) installée en partie basse dans l'espace libre entre le contour de la lentille et le contour du boîtier.Projector according to claim 7, characterized in that it comprises a town lamp (V) installed at the bottom in the free space between the contour of the lens and the contour of the housing. Projecteur selon l'une quelconque des revendications précédentes, caractérisé en ce que le cache (M) peut être positionné selon au moins une position intermédiaire située entre ladite position active et ladite position effacée, permettant ainsi de générer un faisceau avec une coupure plus élevée que la coupure du faisceau générée lorsque le cache (M) est dans ladite position active.Projector according to any one of the preceding claims, characterized in that the cover (M) can be positioned in at least one intermediate position situated between said active position and said erased position, thus making it possible to generate a beam with a higher cutoff than the cut of the beam generated when the cover (M) is in said active position.
EP20080100290 2007-01-12 2008-01-09 Double-function headlight for an automobile Not-in-force EP1944542B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0700254A FR2911310B1 (en) 2007-01-12 2007-01-12 BIFUNCTION TYPE LUMINOUS PROJECTOR FOR MOTOR VEHICLE

Publications (2)

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EP1944542A1 true EP1944542A1 (en) 2008-07-16
EP1944542B1 EP1944542B1 (en) 2011-10-26

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EP20080100290 Not-in-force EP1944542B1 (en) 2007-01-12 2008-01-09 Double-function headlight for an automobile

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US (1) US7784985B2 (en)
EP (1) EP1944542B1 (en)
AT (1) ATE530848T1 (en)
FR (1) FR2911310B1 (en)

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US8475022B2 (en) 2010-12-08 2013-07-02 Ford Global Technologies, Llc Articulating reflector lighting assembly for a vehicle
US8496365B2 (en) 2010-12-08 2013-07-30 Ford Global Technologies, Llc Articulating lamp assembly for a vehicle
CN103206661B (en) * 2013-02-22 2014-11-05 浙江捷莱照明有限公司 G4 LED (light emitting diode) lamp
CN105003876B (en) * 2015-06-11 2017-11-21 杨键 Offroad vehicle fog lamp
FR3072446B1 (en) * 2017-10-13 2021-06-25 Valeo Vision "LIGHTING MODULE FORMING A LUMINOUS PATTERN DIVIDED INTO A CLEAR UPPER PORTION AND A BLURRED LOWER PORTION"

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EP1219887A2 (en) * 2000-12-25 2002-07-03 Stanley Electric Co., Ltd. Vehicle light capable of changing light distribution pattern between low-beam mode and high-beam mode by a movable shade and a reflecting surface
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Also Published As

Publication number Publication date
ATE530848T1 (en) 2011-11-15
EP1944542B1 (en) 2011-10-26
US7784985B2 (en) 2010-08-31
FR2911310B1 (en) 2009-04-17
FR2911310A1 (en) 2008-07-18
US20080170407A1 (en) 2008-07-17

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