EP1500869B1 - Module d'éclairage elliptique sans cache réalisant un faisceau d'éclairage à coupure et projecteur comportant un tel module - Google Patents

Module d'éclairage elliptique sans cache réalisant un faisceau d'éclairage à coupure et projecteur comportant un tel module Download PDF

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Publication number
EP1500869B1
EP1500869B1 EP04291792A EP04291792A EP1500869B1 EP 1500869 B1 EP1500869 B1 EP 1500869B1 EP 04291792 A EP04291792 A EP 04291792A EP 04291792 A EP04291792 A EP 04291792A EP 1500869 B1 EP1500869 B1 EP 1500869B1
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EP
European Patent Office
Prior art keywords
reflector
lighting module
light
lighting
elliptical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP04291792A
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German (de)
English (en)
French (fr)
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EP1500869A1 (fr
Inventor
Pierre Albou
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Valeo Vision SAS
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Valeo Vision SAS
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Priority to PL04291792T priority Critical patent/PL1500869T3/pl
Publication of EP1500869A1 publication Critical patent/EP1500869A1/fr
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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
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • 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
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F21S41/164—Incandescent light sources, e.g. filament or halogen lamps having two or more filaments
    • 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
    • F21S41/27—Thick lenses
    • 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
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—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
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting module and a lighting projector for a motor vehicle.
  • the present invention more particularly relates to a lighting module for a motor vehicle headlight producing a cut-off type of lighting beam, comprising, arranged from rear to front globally along a longitudinal horizontal optical axis, an elliptical type reflector which defines a reflection volume for light rays and which has a substantially elliptical reflection surface, at least one light source which is arranged in the vicinity of a first focus of the reflector, and a convergent lens whose focal plane is arranged in the vicinity of second focus of the reflector.
  • Elliptical type projectors or projectors with optical image reproduction, are well known, especially for producing a cut-off lighting beam.
  • cut-off lighting beam is meant a lighting beam that has a directional limit, or cutoff, above which the light intensity emitted is low.
  • the dipped beam, fog lamp and code functions are examples of cut-off light beams in accordance with current European legislation.
  • the cut is made by means of a cover, which is formed of a vertical plate of suitable profile, which is interposed axially between the elliptical reflector and the convergent lens, and which is arranged in the vicinity of second focus of the reflector.
  • the cache makes it possible to mask the light rays coming from the light source and reflected by the reflector towards the lower part of the focal plane of the converging lens, and which, in the absence of a cover, would be emitted by the projector above the cut.
  • a disadvantage of this type of projector is that a significant portion of the light energy emitted by the source is dissipated in the rear face of the cache. Moreover, this type of module does not allow a dual function, namely the "route” function and the "code” function.
  • a lighting module for a motor vehicle headlamp producing a cut-off type of lighting beam comprising, arranged from rear to front globally along a longitudinal horizontal optical axis, two elliptical type reflectors which each delimits a reflection volume for light rays and each of which comprises a substantially elliptical reflection surface, two light sources which are respectively arranged in the vicinity of a first focus of each reflector, and a convergent lens whose focal plane is arranged at near the second focus of the first reflector, the first reflector having a horizontal plane reflective surface, the upper surface of which is reflecting, which defines vertically downward the reflection volume of the beam emitted by the first light source and having an edge of front end, said cutting edge, which is arranged in the vicinity of the dry reflector focus, so as to form the cut-off in the illumination beam.
  • the first light source formed of a filament is equipped with a lower cover ensuring a single beam upwards emitted by this source.
  • the first elliptical reflector associated with it can therefore be designed in an optimized manner according to this first source to fulfill the code function.
  • the second light source also a filament
  • the second light source can emit just as much upwards as downwards. If the second elliptical reflector associated with it can be designed in an optimized manner according to this second source to fulfill the road function, there is an upper beam defined by the choice of this second light source and reflecting on the first reflector defined as to him by the choice of the first light source. If this beam once reflected, participates in the route function, this function can not be optimized since it depends on criteria relating to the code function, as regards the first reflector.
  • the invention solves this technical problem and to do this, it proposes a lighting module for a motor vehicle headlight producing a cut-off type of lighting beam, comprising, arranged from rear to front globally along a horizontal optical axis longitudinal, two reflectors of the elliptical type which each delimits a reflection volume for light rays and which each comprises a substantially elliptical reflection surface, two light sources which are respectively arranged in the vicinity of a first focus of each reflector, and a lens convergent whose focal plane is arranged in the vicinity of the second focal point of the first reflector, this first reflector comprising a horizontal flat reflective surface, the upper surface of which is reflecting, which delimits vertically downwards the reflection volume of the beam emitted by the first reflector.
  • the second light source is arranged so as to emit a beam illuminated only towards the second reflector, at least one of the light sources consisting of a light emitting diode.
  • each light source emits in a half-volume of reflection limited by the corresponding elliptical reflector, independently. This makes it possible to control their function and their radiation in a simple and precise way.
  • the majority of the luminous flux emitted by each source is used in the light beam produced by the module, in order to achieve the dual lighting function.
  • associated regulation preferably the "road” function and the "code” function.
  • this arrangement consists in that the two light sources are separated by an opaque cover.
  • the second foci of the first and second elliptical reflectors are substantially merged.
  • said horizontal flat reflection surface whose upper surface is reflective, consists of a transparent part carrying a reflective coating.
  • This characteristic makes it possible to limit the hole or dead zone of light corresponding to the image of the thickness of this reflecting face by the light beam reflected by the first reflector to the thickness of the said reflective coating which can be produced by vacuum deposition.
  • aluminum for example which is of a thickness between about 500 nm and about a few micrometers, of the order of magnitude of a few visible wavelengths.
  • this transparent piece also has an optical function relative to the optical beam reflected by the second reflector. Indeed, it is crossed by this beam.
  • said transparent part comprises a spherical lower face centered on the second focus of the second elliptical reflector.
  • the substantially elliptical surface of the first reflector is formed by an angular sector substantially of revolution about the longitudinal optical axis, and in that this angular sector extends vertically above the flat surface of the reflector .
  • the substantially elliptical surface of the second reflector is formed by an angular sector substantially of revolution about a so-called axis of revolution.
  • the optical axis of the first reflector and the axis of revolution of the second reflector are secant.
  • the invention also relates to a motor vehicle lighting projector comprising at least one lighting module as previously specified and intended for a dual lighting function.
  • this dual function includes the lighting function in "code” mode and the lighting function in "road” mode.
  • FIG. 1 shows schematically a lighting module 10 which is produced in accordance with the teachings of the invention.
  • the lighting module 10 comprises, arranged from rear to front along a longitudinal longitudinal optical axis AA, a first reflector 12 of the elliptical type, a first light source 14 which is arranged in the vicinity of a first focus F1 the first reflector 12, and a convergent lens 16 whose focal plane is arranged in the vicinity of the second focus F2 of the first reflector 12.
  • the first reflector 12 and the lens 16 form part of the optical system of the lighting module 10.
  • the optical axis AA defines here, without limitation, a horizontal longitudinal direction and a back-to-front orientation, which corresponds to a left-to-right orientation in the figures.
  • the optical path AA is substantially parallel to the longitudinal axis of a vehicle (not shown) equipped with the lighting module 10.
  • the convergent lens 16 is here a piece of revolution around the longitudinal optical axis A-A.
  • the lens 16 comprises, vis-à-vis the first reflector 12, a transverse input surface 17 for the light rays.
  • the first reflector 12 has an elliptical surface 18 which is formed as an angular sector substantially of revolution, and which extends in the half space above a horizontal axial plane passing through the longitudinal optical axis AA.
  • the elliptical surface 18 may not be perfectly elliptical and may have several specific profiles intended to optimize the light distribution in the lighting beam produced by the module 10, according to the "code" lighting function performed by the module 10. This implies that the reflector is not perfectly revolution.
  • the first reflector 12 comprises a horizontal flat surface 22 whose upper face 24 is reflective.
  • the first reflector 12 defines a reflection volume for the light rays emitted by the first source 14, that is to say a volume in which the light rays are emitted and in which the light rays are reflected.
  • This reflection volume is delimited, in its upper part, by the internal reflection face 20 of the elliptical surface 18, and vertically downwards by the reflecting face 24 of the flat surface 22.
  • the flat surface 22 extends here in a horizontal axial plane.
  • Figures 2 to 7 show only this first reflector 12, the lens 16 and the flat surface 22.
  • the plane surface 22 is delimited, at the rear, at its intersection with the elliptical surface 18, by an elliptical edge 26, and at the front, by a front longitudinal end edge 28. It may be alternatively provided that the planar surface 22 is delimited at the rear by a line segment perpendicular to the axis AA and passing in the immediate vicinity of the source 14, in front of the latter.
  • the front end edge 28 of the flat surface 22 is arranged in the vicinity of the second focus F2 of the reflector 12, so as to form a sharp enough cut in the illumination beam produced by the lighting module 10.
  • this front end edge 28 will be designated by "cutting edge 28".
  • the reflecting flat surface 22 comprises a semi-ellipsoidal rear section 30, which is delimited by the elliptical edge 26, and by the diameter 32 of the semi-circular front edge 34 of the elliptical surface 18.
  • the reflective flat surface 22 comprises a generally isosceles trapezoidal front section 36, which is delimited by the diameter 32 of the elliptical surface 18, by two lateral edges 38, 40, and by the cut-off edge 28.
  • the transverse width of the front section 36 increases progressively forward, so that the transverse width of the cutting edge 28 is substantially equal to the diameter of the entrance surface of the lens 16.
  • the flat surface 22 may comprise only a front section 36, which extends axially rearwards, from the cutting edge 28 to a given point of the optical axis AA situated between the first F1 and the second F2 focal points of the reflector 12.
  • the light source 14 is designed to emit its light energy in less than a "half-space" situated above the plane surface 22, and to emit its light energy towards the inner face 20 of the elliptical surface 18.
  • the light source 14 is an encapsulated light-emitting diode 44.
  • light-emitting diode 44 denotes the junction which produces the light energy as well as the globe or the light-diffusing capsule which envelops the upper part of the junction.
  • the light-emitting diode 44 is mounted on an electronic support plate 42, which is represented in FIG. 4, and which is arranged here parallel to the flat surface 22.
  • the light-emitting diode 44 has a light-scattering axis B-B which is here substantially perpendicular to the flat surface 22.
  • the light emitting diode 44 emits its light energy in a solid angle generally centered about its light scattering axis B-B, and less than 180 degrees.
  • This arrangement allows the diode 44 to emit the majority of its light energy towards the inner face 20 of the elliptical surface 18.
  • the principle of operation of the lighting module 10 according to the invention is as follows.
  • the light source 14 is of small extent around a point coincident with the first focus F1 of the elliptical reflector 18.
  • the light rays emitted by the light source 14 which pass above the cutting edge 28 and which will be designated by primary rays R1 are considered.
  • the light source 14 is arranged at the first focus F1 of the elliptical reflector 18, most of the primary rays R1 emitted by the source 14, after being reflected on the inner face 20 of the elliptical surface 18, is returned to the second focus F2 of the reflector 18, or in the vicinity thereof.
  • These primary light rays R1 form, at the focus F2 of the lens 16, a concentrated light image which is projected, at the front of the lighting module 10, by the lens 16, in a direction substantially parallel to the longitudinal axis AA but facing down.
  • These secondary light rays R2 are reflected by the inner face 20 of the elliptical surface 18 towards the reflecting flat surface 22, so that they are reflected a second time forward.
  • the secondary light rays R2 are transmitted towards the upper part of the input surface 17 of the lens 16. Therefore, because of its convergence properties, the lens 16 deflects secondary light rays R2 to the bottom. The secondary light rays R2 are therefore emitted under the cut-off in the illumination beam, in the same zone as that in which the rays R1 are emitted.
  • An advantage of the lighting module 10 according to the invention is that its optical system 11 does not obscure a significant portion of the light rays emitted by the source 14, as is the case in a conventional lighting module comprising a cache .
  • the reflecting flat surface 22 can "fold" the images of the light source 14 which are reflected by the elliptical surface 18 of the reflector 12 to the second focus F2 of the reflector 12.
  • each image would then comprise an upper portion located at above the cut-off edge 28 and a lower portion below the cut-off edge 28. Thanks to the reflecting flat surface 22, the lower portion of each image is reflected upwards, as if the lower portion were folded over the upper portion, so that these image portions are superimposed above the cutoff edge 28, in the vertical plane generated by the cutoff edge 28.
  • the "fold” formed by this "folding" of images contributes to forming a clean cut in the light beam projected by the lens 16.
  • the lighting module 10 also has particular advantages in the context of the use of a light emitting diode 44 as a light source 14 in a lighting module.
  • the image of the virtual source corresponding to a diode is generally round and diffuse.
  • the light source is a filament
  • its virtual image has the overall shape of a rectangle, so that it is relatively easy to make a clean cut by aligning the edges of the rectangles.
  • the light source is a diode, it is much more difficult to make a clean cut by aligning the corresponding images of round shapes.
  • the lighting module 10 makes it possible to make a clean cut with a diode 44, because it projects at the front the image of an edge of the optical system 11, that is to say the image of the edge cutoff 28.
  • the shape of the cut in the illumination beam is thus determined by the profile of the cut-off edge 28, in a projection on a vertical and transverse plane.
  • Another difficulty for the realization of a lighting module from a diode comes from the fact that the distribution of light energy in the light beam emitted by the diode is not homogeneous. Therefore, it is very difficult to achieve a homogeneous illumination beam from the direct images of the diode.
  • the lighting module 10 overcomes this difficulty by exploiting a property of the elliptical lighting modules which is to "mix" the images of the light source with the second focus F2 of the reflector 12, which improves the homogeneity of the light. lighting beam produced.
  • An advantage of the lighting module 10 according to the invention is that it exploits the property of the encapsulated diodes 44 to emit globally in a half space, which captures more than eighty percent of the luminous flux emitted by the diode 44, whereas in a traditional code elliptical projector, less than fifty percent of the luminous flux is captured.
  • the lighting module 10 is made by an assembly of discrete elements.
  • the lighting module 10 comprises, for example, an element 18 forming the elliptical portion of the reflector 12, an element 22 forming the flat surface of the reflector 12, and an element 16 forming the convergent lens.
  • the inner face of the elliptical portion 18 and the upper face of the flat surface 22 are for example coated with a reflective material.
  • the light source 14 is a light emitting diode 44
  • the discrete elements in the form of polymer parts, assembled for example by interlocking.
  • the lens 16 may be a Fresnel lens.
  • the optical system 11 of the lighting module 10 is made in one solid optical part, made of transparent material, for example PMMA (polymethacrylate). methyl).
  • the solid optical part is for example made by molding, or by machining.
  • the outer surface of the elliptical portion 18 of the reflector 12 and the outer surface, here below, of the flat surface 22 of the reflector 12 are coated with a reflective material.
  • the total reflection properties in a medium of index greater than air to cause the reflection of the light rays in the reflection volume delimited by the reflector 12, without the use of reflective material.
  • These portions of the reflector 12 will then have a shape slightly different from that of a pure ellipsoid.
  • the light rays which are emitted by the light source 14 propagate inside the material constituting the optical system 11 of the lighting module 10, then they leave the optical system 11 through the front face of the light source. the convergent lens 16.
  • the reflecting flat surface 22 comprises a cavity of complementary shape to the capsule of the light-emitting diode 44.
  • the cavity is substantially hemispherical.
  • the reflector 12 is made in one piece of transparent material, which is distinct from the piece forming the convergent lens 16.
  • the light source 14 can be made by means of several light-emitting diodes 44.
  • the light-emitting diodes 44 must be very close to each other, so that they are arranged generally at the first focus F1 of the reflector 12.
  • two diodes 44 are aligned, advantageously in a direction perpendicular to the longitudinal optical axis A-A.
  • the resulting light source 14 is then equivalent to an extended light source width, since the light beams produced by each light emitting diode 44 overlap.
  • This arrangement of the diodes 44 thus makes it possible to widen the light beam produced by the lighting module 10.
  • a vehicle headlight is produced by means of several identical lighting modules 10 operating simultaneously.
  • the lighting modules 10 are arranged in parallel, that is to say that their optical axes A-A are substantially parallel to each other.
  • the lighting beams produced by each of the lighting modules 10 are superimposed on the front of the vehicle so as to form the regulatory lighting beam cutoff.
  • FIG. 7 shows a vehicle headlight 46 which carries out a code function and which uses four identical lighting modules 10.
  • crossing lighting beam must comprise a cutoff having a portion inclined at a given angle, for example fifteen degrees
  • two lighting modules 48 of the projector 46 are rotated by fifteen degrees, about their longitudinal optical axis AA, in such a way as to produce a lighting beam having an inclined cut of fifteen degrees with respect to a horizontal plane.
  • the other two lighting modules 50 form a lighting beam having a horizontal cut.
  • the superposition of the illumination beams produced by the four lighting modules 10 then forms a regulatory lighting beam having a horizontal portion and an inclined portion of fifteen degrees.
  • the light source 14 may be formed by the free end of an optical fiber bundle.
  • optical fibers form a light source comprising a light core and a dark ring, due to the sheath surrounding the core of the fiber.
  • This type of light source when used in a vehicle lighting projector using for example a reflector of the complex surface type, thus forms, in the light beam, images in the form of pixels surrounded by an area dark, due to the sheath.
  • An advantage of the lighting module 10 according to the invention is that it allows all the images of the light source 14 to be mixed with the second focus F2 of the reflector 12, so that the lighting beam pixels of the optical fiber.
  • the module according to the invention intended to equip a motor vehicle lighting projector, also comprises arranged from rear to front generally along the longitudinal horizontal optical axis AA, a second reflector 12 'of the elliptical type which delimits a reflection volume for light rays and which has a substantially elliptical reflection surface 18 ', 20', a second light source 14 'which is arranged in the vicinity of a first focus F1' of the second reflector 12 '.
  • This second light source 14 ' is arranged so as to emit a single light beam downwards.
  • the second reflector 18 'and the second light source 14' may be similar to the first reflector 18 and the first light source 14. They may therefore have all the corresponding characteristics already mentioned above, without these being repeated here explicitly.
  • the two selectively-controlled light sources 14, 14 ' which are preferably two light-emitting diodes or two sets of light-emitting diodes are separated from an opaque cover 60 which may optionally contain a radiator and control circuits.
  • the substantially elliptical surface of the first reflector 12 is formed by an angular sector substantially of revolution about the longitudinal optical axis AA, and this angular sector extends vertically above of the flat surface 22 of the reflector.
  • the substantially elliptical surface of the second reflector is, for its part, formed by an angular sector substantially of revolution about its axis of revolution A'-A 'and, advantageously, the optical axis AA of the first reflector and the axis of revolution A'-A 'of the second reflector are secant.
  • the second elliptical reflector 12 ' is arranged to have its second focus substantially coincident with the second focus F2 of the first reflector 12.
  • the optical axis AA of the first reflector and the axis of revolution A'-A' of the second reflector are thus intersected. substantially in this second focus F2.
  • the horizontal plane reflective surface 22, whose upper face 24 is reflective, consists of a transparent piece 22 'bearing a reflective coating on its upper face and forming the reflective upper surface 24.
  • this piece transparent 22 ' has a spherical bottom surface 22A substantially centered on the second focus F2.
  • Its side face 22B facing the lens 16 is advantageously defined by a defined surface defined in a vertical plane by lines connecting the upper edge 34 of the first reflector 12 to the second focus F2.
  • this transparent piece 22 ' is made of PMMA (polymethyl methacrylate) and the reflective coating consists of a vacuum deposition of aluminum.
  • FIG. 9 An image I1 of the projection of the light beam emitted by the module at the output of the lens 16 is shown schematically in FIG. 9.
  • This first function of the module corresponds in particular to the "code" mode of a motor vehicle headlamp.
  • FIG. image I2 An image of the projection of the light beam emitted by the module at the output of the lens 16 is shown schematically in FIG. image I2 is added to the previous image I1.
  • This second function of the module corresponds in particular to the "road" mode of a motor vehicle headlamp.
  • the two images in question I1 and I2 are joined to the eye and form a single beam of light.
EP04291792A 2003-07-24 2004-07-13 Module d'éclairage elliptique sans cache réalisant un faisceau d'éclairage à coupure et projecteur comportant un tel module Active EP1500869B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04291792T PL1500869T3 (pl) 2003-07-24 2004-07-13 Moduł oświetlający eliptyczny bez zasłony wytwarzający strumień oświetlający z odcięciem i reflektor zawierający taki moduł

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0309094 2003-07-24
FR0309094A FR2858042B1 (fr) 2003-07-24 2003-07-24 Module d'eclairage elliptique sans cache realisant un faisceau d'eclairage a coupure et projecteur comportant un tel module

Publications (2)

Publication Number Publication Date
EP1500869A1 EP1500869A1 (fr) 2005-01-26
EP1500869B1 true EP1500869B1 (fr) 2006-08-23

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EP04291792A Active EP1500869B1 (fr) 2003-07-24 2004-07-13 Module d'éclairage elliptique sans cache réalisant un faisceau d'éclairage à coupure et projecteur comportant un tel module

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Country Link
EP (1) EP1500869B1 (es)
JP (1) JP4460966B2 (es)
AT (1) ATE337518T1 (es)
DE (1) DE602004002043T2 (es)
ES (1) ES2271804T3 (es)
FR (1) FR2858042B1 (es)
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DE102010021937A1 (de) * 2010-05-28 2011-12-01 Hella Kgaa Hueck & Co. LED-Projektionsmodul für einen Fahrzeugscheinwerfer
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JP6271183B2 (ja) 2013-08-12 2018-01-31 株式会社小糸製作所 車両用灯具
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DE102013225950B4 (de) * 2013-12-13 2017-06-01 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugbeleuchtungseinrichtung
JP6448250B2 (ja) * 2014-08-11 2019-01-09 株式会社小糸製作所 車両用灯具
DE102015113141A1 (de) 2014-12-15 2016-06-16 Mauser-Werke Oberndorf Maschinenbau Gmbh Verfahren zur Bearbeitung einer Werkstückoberfläche und Werkstück
FR3038696B1 (fr) * 2015-07-10 2022-02-18 Valeo Vision Module lumineux pour l'eclairage et/ou la signalisation d'un vehicule automobile
CN105805669A (zh) * 2016-03-30 2016-07-27 奇瑞汽车股份有限公司 Led近光灯配光装置
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PL1500869T3 (pl) 2006-12-29
FR2858042B1 (fr) 2005-09-23
DE602004002043T2 (de) 2007-04-12
ATE337518T1 (de) 2006-09-15
FR2858042A1 (fr) 2005-01-28
EP1500869A1 (fr) 2005-01-26
JP2005044809A (ja) 2005-02-17
ES2271804T3 (es) 2007-04-16
DE602004002043D1 (de) 2006-10-05
JP4460966B2 (ja) 2010-05-12

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