EP1500869A1 - Elliptical lighting module without screen emitting a low beam and headlamp comprising the same - Google Patents

Elliptical lighting module without screen emitting a low beam and headlamp comprising the same Download PDF

Info

Publication number
EP1500869A1
EP1500869A1 EP04291792A EP04291792A EP1500869A1 EP 1500869 A1 EP1500869 A1 EP 1500869A1 EP 04291792 A EP04291792 A EP 04291792A EP 04291792 A EP04291792 A EP 04291792A EP 1500869 A1 EP1500869 A1 EP 1500869A1
Authority
EP
European Patent Office
Prior art keywords
reflector
lighting
lighting module
light
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.)
Granted
Application number
EP04291792A
Other languages
German (de)
French (fr)
Other versions
EP1500869B1 (en
Inventor
Pierre Albou
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Priority to PL04291792T priority Critical patent/PL1500869T3/en
Publication of EP1500869A1 publication Critical patent/EP1500869A1/en
Application granted granted Critical
Publication of EP1500869B1 publication Critical patent/EP1500869B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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 motor vehicle lighting projector.
  • the present invention relates more particularly to a module lighting for a motor vehicle headlight producing a lighting beam of the cut-off type, comprising, rear-facing before globally along a horizontal longitudinal optical axis, a reflector of the elliptical type which delimits a reflection volume for light rays and which has a substantially elliptical surface of reflection, at least one light source which is arranged in the vicinity of a first focus of the reflector, and a convergent lens whose plane focal is arranged in the vicinity of the second focus of the reflector.
  • Elliptical projectors or projectors with optical image reproduction, are well known, especially for the realization of a cut-off lighting beam.
  • a beam of cut-off lighting means a beam lighting that has a directional limit, or cutoff, above from which the luminous intensity emitted is weak.
  • low beam, fog lamps and codes are examples of cut-off light beams, in accordance with the European legislation in force.
  • the cut is made by means of a cover, which is formed of a vertical plate of adapted profile, which is interposed axially between the elliptical reflector and the convergent lens, which is arranged in the vicinity of the second focus reflector.
  • the cache allows to hide the light rays from the light source and reflected by the reflector towards the lower part of the focal plane of the convergent lens, and which would be, in the absence of cache, emitted by the projector above the cutoff.
  • a disadvantage of this type of projector is that part significant amount of light energy emitted by the source dissipates into the back side of the cache.
  • this type of module does not allow dual function, namely the "road” function and the "code” function.
  • a lighting module for a motor vehicle headlamp producing a lighting beam of the cut-off type comprising, arranged from rear to front overall along a longitudinal horizontal optical axis, two reflectors of the type elliptical which each delineates a volume of reflection for rays each of which has a substantially elliptical surface of reflection, two light sources which are respectively arranged at neighborhood of a first focus of each reflector, and a lens convergent whose focal plane is arranged in the vicinity of the second focus of the first reflector, this first reflector having a surface horizontal plane of reflection, whose upper surface is reflective, which delimits vertically down the beam reflection volume emitted by the first light source and having an end edge before, said cutting edge, which is arranged in the vicinity of the second focus reflector, so as to form the cut in the beam lighting.
  • the first light source formed of a filament is equipped with a lower cover ensuring a single beam upward issued by this source.
  • the first elliptical reflector that is associated can be so optimized designed according to this first source to fulfill the function code.
  • the second light source also a filament
  • the second light source can emit as much up as down. If the second elliptical reflector associated with it can be designed so optimized according to this second source to fulfill the function route, there is an upper beam defined by the choice of this second light source and reflecting on the first reflector defined as for him by the choice of the first light source. If this beam once thoughtful participates in the route function, this function can only be optimized since it depends on criteria relating to the code function, for the first reflector.
  • the invention solves this technical problem and to do this, it offers a lighting module for a vehicle headlamp automobile producing a lighting beam of the cut-off type, comprising, arranged from rear to front generally along an axis longitudinal horizontal optics, two elliptical type reflectors which each delineates a reflection volume for light rays and which each has a substantially elliptical reflection surface, two light sources which are respectively arranged in the vicinity of a first focus of each reflector, and a converging lens whose focal plane is arranged in the vicinity of the second focus of the first reflector, this first reflector having a flat surface horizontal reflection, whose upper surface is reflective, which vertically downwards the reflection volume of the beam emitted by the first light source and having an end edge before, said cutting edge, which is arranged in the vicinity of the second focus of the reflector, this flat surface of the first reflector being arranged in a horizontal plane passing globally through the foci of the first reflector, characterized in that the second light source is arranged to emit a light beam
  • each light source emits in half a volume of reflection limited by the corresponding elliptical reflector, so independent. This allows to control their function and their radiation in a simple and precise way.
  • the majority of the flow light emitted by each source is used in the light beam produced by the module, to achieve the dual function of lighting regulatory framework, preferably the "road” function and the "Code” ..
  • this arrangement consists in that the two light sources are separated by a cowling opaque.
  • the second foci of the first and second elliptical reflectors are substantially merged.
  • said flat horizontal plane of reflection whose upper surface is reflective, consists of a piece transparent with 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 face reflective by the light beam reflected by the first reflector to the thickness of said reflective coating which can be realized by a vacuum deposit of 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 part also has a function optical relative to the optical beam reflected by the second reflector. Indeed, it is crossed by this beam.
  • said transparent piece has a lower face spherical 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, around the longitudinal optical axis, and in that this sector angle 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, around an axis called 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 lighting projector of motor vehicle having at least one lighting module such as previously specified and intended for a dual lighting function.
  • this dual function includes the function lighting in "code” mode and the lighting function in "Road”.
  • FIG. 1 schematically shows a module lighting 10 which is made in accordance with the teachings of the invention.
  • the lighting module 10 comprises, arranged from rear to front along a horizontal longitudinal optical axis A-A, a first reflector 12 of the elliptical type, a first source 14 which is arranged in the vicinity of a first focus F1 of 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 A-A defines here, in a non-limiting way, a direction longitudinal axis and a back-to-front orientation, which corresponds to a left-to-right orientation in the figures.
  • the axis optical A-A is for example 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 of the longitudinal optical axis A-A.
  • the lens 16 has, 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 in the form of a substantially angular sector of revolution, and which extends in the half space above a passing horizontal axial plane by the longitudinal optical axis A-A.
  • the inner face 20 of the elliptical surface 18 is reflective.
  • the elliptical surface 18 may not be perfectly elliptical and she can have several specific profiles planned for optimize the light distribution in the product beam by the module 10, according to the lighting function "code" performed by the module 10. This implies that the reflector is not perfectly of revolution.
  • the first reflector 12 has a horizontal flat surface 22 whose face upper 24 is reflective.
  • the first reflector 12 delimits a reflection volume for the light rays emitted by the first source 14, ie a volume in which the light rays are emitted and in which the rays bright are reflected. This volume of reflection is delimited, in its upper part, by the internal surface of reflection 20 of the surface elliptical 18, and vertically downwardly by the reflecting face 24 of the flat surface 22.
  • the flat surface 22 extends here in a horizontal axial plane.
  • FIGS 2 to 7 represent only this first reflector 12, the lens 16 and the flat surface 22.
  • the flat 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 longitudinal end edge before 28. It can be provided alternatively that the flat surface 22 is delimited at the rear by a segment of perpendicular to the axis A-A 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 at the near the second focus F2 of the reflector 12, so as to form a sufficiently sharp cut in the lighting beam produced by the lighting module 10.
  • the curved shape of this profile is more or less complex, and can be likened in a first approximation to a arc. Therefore, preferably, the cutoff edge 28a a curved profile, in the horizontal plane, so as to follow overall the profile of the focal plane of the lens 16.
  • the flat surface reflective 22 has a semi-ellipsoidal rear portion 30, which is delimited by the elliptical edge 26, and by the diameter 32 of the front edge 34 semi-circular of the elliptical surface 18.
  • the reflecting flat surface 22 has a front section 36 overall isosceles trapezoidal, which is delimited by the diameter 32 of the elliptical surface 18, by two lateral edges 38, 40, and by the edge of cutoff 28.
  • the width cross-section of the front section 36 progressively increases towards the front, so that the transverse width of the cutting edge 28 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 up to a certain point in the optical axis A-A between the first F1 and the second F2 foci of the reflector 12.
  • the light source 14 is provided for emit light energy in less than one "half-space" above the flat surface 22, and to emit its light energy towards the inner face 20 of the elliptical surface 18.
  • the light source 14 is a diode electroluminescent encapsulated 44.
  • light emitting diode 44 the junction which produces light energy as well as globe, or capsule, diffusion bright, which envelops the upper part of the junction.
  • the light-emitting diode 44 is mounted on an electronic support plate 42, which is shown in FIG. 4, and which is arranged here parallel to the flat surface 22.
  • the light-emitting diode 44 has a diffusion axis luminous B-B which is here substantially perpendicular to the surface plane 22.
  • the light-emitting diode 44 emits its light energy in a solid angle globally centered around its diffusion axis bright 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 coincides with the first focus F1 of the reflector elliptical 18.
  • 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 of it.
  • These primary light rays R1 form, at the focus F2 of the lens 16, a concentrated bright image that is projected, at the front of the lighting module 10, by the lens 16, in one direction substantially parallel to the longitudinal axis A-A, but oriented towards the low.
  • These secondary light rays R2 are reflected by the face internal 20 of the elliptical surface 18 to the reflecting flat surface 22, so that they are reflected a second time forward.
  • secondary light rays R2 are transmitted to the upper part of the entry surface 17 of the 16. Therefore, because of its convergence properties, the lens 16 deflects the secondary light rays R2 downwards. The secondary light rays R2 are thus emitted under the cut in the lighting beam, in the same area in which are emitted the rays R1.
  • An advantage of the lighting module 10 according to the invention is that its optical system 11 does not hide a large part of the rays light emitted by the source 14, as is the case in a module conventional lighting with a cover.
  • the reflecting flat surface 22 makes it possible to "fold" the images of light source 14 that are reflected by the surface elliptical 18 of the reflector 12 to the second focus F2 of the reflector 12.
  • the "fold” formed by this "folding" of images helps to form a clear 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 diode electroluminescent 44 as a light source 14 in a module lighting.
  • the image of the virtual source corresponding to a diode is usually round and diffuse.
  • the light source is a filament
  • its virtual image has globally the 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 images corresponding, round shapes.
  • the lighting module 10 makes it possible to clear cut with a diode 44, because it projects to the front the image of a edge of the optical system 11, ie the image of the cutoff edge 28.
  • the shape of the cut in the lighting beam is therefore determined by the profile of the cutting edge 28, in a projection on a vertical and transverse plane.
  • Another difficulty for the realization of a lighting module to from a diode comes from the fact that the distribution of energy light in the light beam emitted by the diode is not homogeneous. Therefore, it is very difficult to achieve a beam homogeneous lighting from the direct images of the diode.
  • the lighting module 10 overcomes this difficulty in exploiting a property of elliptical lighting modules which is to "mix" the images of the light source to the second focal point F2 of the reflector 12, which improves the homogeneity of the beam lighting product.
  • An advantage of the lighting module 10 according to the invention is that it exploits the property of encapsulated diodes 44 to emit globally in a half space, which captures over eighty percent of the luminous flux emitted by the diode 44, whereas in a traditional code elliptical projector, we capture less than fifty percent of the luminous flux.
  • the lighting module 10 is achieved 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 lens convergent.
  • the inner face of the elliptical portion 18 and the upper face of the flat surface 22 are for example coated with a material reflective.
  • the light source 14 is a diode electroluminescent 44, given the low heat dissipation of this type of source, compared to lamps, it is possible to realize 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 FIG. lighting module 10 is made in one solid optical part, in 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 surface outer, here below, the flat surface 22 of the reflector 12 are coated with a reflective material.
  • 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 come out of the optical system 11 through the front of the lens convergent 16.
  • the reflecting flat surface 22 comprises a cavity of complementary shape to the capsule of the diode electroluminescent 44.
  • the cavity is substantially hemispherical.
  • the reflector 12 is made of a single piece of transparent material, which is distinct from the piece forming the convergent lens 16.
  • the light source 14 can be realized at by means of a plurality of light-emitting diodes 44.
  • the light-emitting diodes 44 must be very close to each other, so that they are arranged overall to the first focus F1 of the reflector 12.
  • two diodes 44 are aligned, advantageously in a direction perpendicular to the axis longitudinal optical A-A.
  • the resulting light source 14 is then equivalent to a light source extended in width because the light beams produced by each light-emitting diode 44 overlap.
  • This arrangement of the diodes 44 thus makes it possible to widen the beam light produced by the lighting module 10.
  • a vehicle headlamp is made by means of several modules identical lighting systems 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 modules 10 are superimposed on the front of the vehicle so as to form the regulatory lighting beam with cut-off.
  • FIG. 7 a projector 46 vehicle that performs a code function, and that uses four identical lighting modules 10.
  • crossing light beam must have a cut having an inclined portion of a given angle, by example fifteen degrees
  • two lighting modules 48 of the projector 46 are rotated fifteen degrees, about their longitudinal optical axis A-A, in order to realize a lighting beam including a cut tilted fifteen degrees from a horizontal plane.
  • the other two lighting modules 50 form a beam lighting having a horizontal cut.
  • the superposition of the lighting beams produced by the four lighting modules 10 then forms a lighting beam with a horizontal part and an inclined part of fifteen degrees.
  • the light source 14 may be formed by the free end of a fiber optic bundle.
  • optical fibers form a light source having a bright heart and a dark ring, due to the sheath surrounding the heart of the fiber.
  • This type of light source when used in a vehicle lighting projector using for example a reflector of type with a complex surface, thus forms, in the lighting beam, images in the form of pixels surrounded by a dark area, due to the sheath.
  • An advantage of the lighting module 10 according to the invention is that it allows to mix all the images of the light source 14 with second focus F2 of the reflector 12, so that we do not find in the lighting beam the pixels of the optical fiber.
  • the module according to the invention intended to equip a automotive vehicle lighting projector, also features arranged from rear to front globally along the horizontal optical axis longitudinal A-A, 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 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' can be similar to the first reflector 18 and the first source 14. They can therefore have all the characteristics correspondents already mentioned above, without these being repeated here explicitly.
  • the two light sources 14, 14 'to control which are preferably two light-emitting diodes or two sets of light-emitting diodes, are separated from one opaque cover 60 which possibly can contain a radiator and control circuits.
  • the substantially elliptical surface of the first reflector 12 is formed by an angular sector of the room substantially of revolution about the longitudinal optical axis A-A, and this angular sector extends vertically above the flat surface 22 of the reflector.
  • the substantially elliptical surface of the second reflector is to it, formed by an angular sector of a piece substantially of revolution, around its so-called axis of revolution A'- A 'and, advantageously, the optical axis A-A of the first reflector and the axis of revolution A'- A 'of the second reflector are intersecting.
  • 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 A-A of the first reflector and the axis of revolution A'-A 'of the second reflector thus intersect substantially in this second focus F2.
  • the flat horizontal reflection surface 22, the face of which upper 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 centered substantially on the second focus F2.
  • Its side face 22B turned towards the lens 16 is advantageously defined by a surface defined defined in vertical plane by straight lines connecting the upper edge 34 from the first reflector 12 to the second focus F2.
  • this transparent piece 22 ' is made of PMMA (polymethylmethacrylate) and the reflective coating is constituted a vacuum deposit of aluminum.
  • the major part primary rays emitted by the source 14, after having reflected on the inner face 20 of the elliptical surface 18, is returned to the second F2 focus of the reflector 18, or in the vicinity thereof.
  • the Rays secondary luminaries are reflected by the inner face 20 of the surface elliptical 18 towards the reflecting flat surface 22, so that they reflect a second time forward, this reflective surface 22 operating a function of "folding".
  • FIG. 1 An image I1 of the projection of the beam of light emitted by the module, at the output of the lens 16, is shown schematically in FIG. 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 beam of light 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 headlight.
  • the two images in question I1 and I2 are eye-joined and form a bundle of single light.

Abstract

The module has two light sources (14, 14) respectively arranged near focal points (F1, F1) of each of two elliptical reflectors (12, 12). The light source (14) is arranged in such a manner to emit a light beam only towards the elliptical reflector (12). The light source (14) is constituted of an encapsulated electroluminescent diode. The light sources are separated by an optical enclosure. An independent claim is also included for a headlight of a motor vehicle comprising a light module.

Description

La présente invention concerne un module d'éclairage et un projecteur d'éclairage de véhicule automobile.The present invention relates to a lighting module and a motor vehicle lighting projector.

La présente invention concerne plus particulièrement un module d'éclairage pour un projecteur de véhicule automobile réalisant un faisceau d'éclairage du type à coupure, comportant, agencés d'arrière en avant globalement suivant un axe optique horizontal longitudinal, un réflecteur du type elliptique qui délimite un volume de réflexion pour des rayons lumineux et qui comporte une surface sensiblement elliptique de réflexion, au moins une source lumineuse qui est agencée au voisinage d'un premier foyer du réflecteur, et une lentille convergente dont le plan focal est agencé au voisinage du second foyer du réflecteur.The present invention relates more particularly to a module lighting for a motor vehicle headlight producing a lighting beam of the cut-off type, comprising, rear-facing before globally along a horizontal longitudinal optical axis, a reflector of the elliptical type which delimits a reflection volume for light rays and which has a substantially elliptical surface of reflection, at least one light source which is arranged in the vicinity of a first focus of the reflector, and a convergent lens whose plane focal is arranged in the vicinity of the second focus of the reflector.

Les projecteurs du type elliptiques, ou projecteurs à optique de reproduction d'image, sont bien connus, notamment pour la réalisation d'un faisceau d'éclairage à coupure.Elliptical projectors, or projectors with optical image reproduction, are well known, especially for the realization of a cut-off lighting beam.

On entend par faisceau d'éclairage à coupure un faisceau d'éclairage qui comporte une limite directionnelle, ou coupure, au-dessus de laquelle l'intensité lumineuse émise est faible.A beam of cut-off lighting means a beam lighting that has a directional limit, or cutoff, above from which the luminous intensity emitted is weak.

Les fonctions de feux de croisement, de feux antibrouillards et de codes sont des exemples de faisceaux d'éclairage à coupure, conformément à la législation européenne en vigueur.The functions of low beam, fog lamps and codes are examples of cut-off light beams, in accordance with the European legislation in force.

Généralement, dans un projecteur elliptique, la coupure est réalisée au moyen d'un cache, qui est formé d'une plaque verticale de profil adapté, qui est interposé axialement entre le réflecteur elliptique et la lentille convergente, et qui est agencé au voisinage du second foyer du réflecteur.Generally, in an elliptical projector, the cut is made by means of a cover, which is formed of a vertical plate of adapted profile, which is interposed axially between the elliptical reflector and the convergent lens, which is arranged in the vicinity of the second focus reflector.

Le cache permet d'occulter les rayons lumineux issus de la source lumineuse et réfléchis par le réflecteur vers la partie inférieure du plan focal de la lentille convergente, et qui seraient, en l'absence de cache, émis par le projecteur au-dessus de la coupure. The cache allows to hide the light rays from the light source and reflected by the reflector towards the lower part of the focal plane of the convergent lens, and which would be, in the absence of cache, emitted by the projector above the cutoff.

Un inconvénient de ce type de projecteur est qu'une partie importante de l'énergie lumineuse émise par la source se dissipe dans la face arrière du cache. Par ailleurs, ce type de module ne permet une double fonction, à savoir la fonction « route » et la fonction « code ».A disadvantage of this type of projector is that part significant amount of light energy emitted by the source dissipates into the back side of the cache. In addition, this type of module does not allow dual function, namely the "road" function and the "code" function.

Une solution à ce problème est divulguée dans le brevet US 4 914 747.A solution to this problem is disclosed in US Patent 4,914 747.

Dans ce document, est décrit un module d'éclairage pour un projecteur de véhicule automobile réalisant un faisceau d'éclairage du type à coupure, comportant, agencés d'arrière en avant globalement suivant un axe optique horizontal longitudinal, deux réflecteurs du type elliptique qui chacun délimite un volume de réflexion pour des rayons lumineux et qui chacun comporte une surface sensiblement elliptique de réflexion, deux sources lumineuses qui sont respectivement agencées au voisinage d'un premier foyer de chaque réflecteur, et une lentille convergente dont le plan focal est agencé au voisinage du second foyer du premier réflecteur, ce premier réflecteur comportant une surface plane horizontale de réflexion, dont la face supérieure est réfléchissante, qui délimite verticalement vers le bas le volume de réflexion du faisceau émis par la première source lumineuse et comportant un bord d'extrémité avant, dit bord de coupure, qui est agencé au voisinage du second foyer du réflecteur, de manière à former la coupure dans le faisceau d'éclairage.In this document is described a lighting module for a motor vehicle headlamp producing a lighting beam of the cut-off type, comprising, arranged from rear to front overall along a longitudinal horizontal optical axis, two reflectors of the type elliptical which each delineates a volume of reflection for rays each of which has a substantially elliptical surface of reflection, two light sources which are respectively arranged at neighborhood of a first focus of each reflector, and a lens convergent whose focal plane is arranged in the vicinity of the second focus of the first reflector, this first reflector having a surface horizontal plane of reflection, whose upper surface is reflective, which delimits vertically down the beam reflection volume emitted by the first light source and having an end edge before, said cutting edge, which is arranged in the vicinity of the second focus reflector, so as to form the cut in the beam lighting.

Selon cet art antérieur, la première source lumineuse formée d'un filament est équipée d'un capot inférieur assurant un faisceau unique vers le haut émis par cette source. Le premier réflecteur elliptique qui lui est associé peut être donc conçu de façon optimisée en fonction de cette première source pour remplir la fonction code.According to this prior art, the first light source formed of a filament is equipped with a lower cover ensuring a single beam upward issued by this source. The first elliptical reflector that is associated can be so optimized designed according to this first source to fulfill the function code.

Par contre, la seconde source lumineuse, également un filament, peut émettre tout autant vers le haut que vers le bas. Si le second réflecteur elliptique qui lui est associé peut être conçu de façon optimisée en fonction de cette seconde source pour remplir la fonction route, il existe un faisceau supérieur défini par le choix de cette seconde source lumineuse et se réfléchissant sur le premier réflecteur défini quant à lui par le choix de la première source lumineuse. Si ce faisceau une fois réfléchi participe à la fonction route, cette fonction ne peut être optimisée puisque dépendante de critères relatifs à la fonction code, pour ce qui est du premier réflecteur.On the other hand, the second light source, also a filament, can emit as much up as down. If the second elliptical reflector associated with it can be designed so optimized according to this second source to fulfill the function route, there is an upper beam defined by the choice of this second light source and reflecting on the first reflector defined as for him by the choice of the first light source. If this beam once thoughtful participates in the route function, this function can only be optimized since it depends on criteria relating to the code function, for the first reflector.

Il en résulte un agencement non contrôlé et d'efficacité aléatoire ou au moins nécessitant de nombreux essais pour obtenir les fonctions souhaitées.This results in an uncontrolled arrangement and random efficiency or at least requiring many tests to get the functions desired.

L'invention résout ce problème technique et pour ce faire, elle propose un module d'éclairage pour un projecteur de véhicule automobile réalisant un faisceau d'éclairage du type à coupure, comportant, agencés d'arrière en avant globalement suivant un axe optique horizontal longitudinal, deux réflecteurs du type elliptique qui chacun délimite un volume de réflexion pour des rayons lumineux et qui chacun comporte une surface sensiblement elliptique de réflexion, deux sources lumineuses qui sont respectivement agencées au voisinage d'un premier foyer de chaque réflecteur, et une lentille convergente dont le plan focal est agencé au voisinage du second foyer du premier réflecteur, ce premier réflecteur comportant une surface plane horizontale de réflexion, dont la face supérieure est réfléchissante, qui délimite verticalement vers le bas le volume de réflexion du faisceau émis par la première source lumineuse et comportant un bord d'extrémité avant, dit bord de coupure, qui est agencé au voisinage du second foyer du réflecteur, cette surface plane du premier réflecteur étant agencée dans un plan horizontal passant globalement par les foyers du premier réflecteur, caractérisé en ce que la seconde source lumineuse est agencée de sorte à émettre un faisceau lumineux uniquement vers le second réflecteur, au moins une des sources lumineuses étant constituée d'une diode électroluminescente.The invention solves this technical problem and to do this, it offers a lighting module for a vehicle headlamp automobile producing a lighting beam of the cut-off type, comprising, arranged from rear to front generally along an axis longitudinal horizontal optics, two elliptical type reflectors which each delineates a reflection volume for light rays and which each has a substantially elliptical reflection surface, two light sources which are respectively arranged in the vicinity of a first focus of each reflector, and a converging lens whose focal plane is arranged in the vicinity of the second focus of the first reflector, this first reflector having a flat surface horizontal reflection, whose upper surface is reflective, which vertically downwards the reflection volume of the beam emitted by the first light source and having an end edge before, said cutting edge, which is arranged in the vicinity of the second focus of the reflector, this flat surface of the first reflector being arranged in a horizontal plane passing globally through the foci of the first reflector, characterized in that the second light source is arranged to emit a light beam only towards the second reflector, at least one of the light sources being consisting of a light emitting diode.

Ainsi, chaque source lumineuse émet dans un demi-volume de réflexion limité par le réflecteur elliptique correspondant, de façon indépendante. Ceci permet de contrôler leur fonction et leur rayonnement de façon simple et précise.Thus, each light source emits in half a volume of reflection limited by the corresponding elliptical reflector, so independent. This allows to control their function and their radiation in a simple and precise way.

Grâce au module d'éclairage selon l'invention, la majorité du flux lumineux émis par chaque source est utilisé dans le faisceau lumineux produit par le module, en vue de réaliser la double fonction d'éclairage réglementaire associée, de préférence la fonction « route » et la fonction « code »..Thanks to the lighting module according to the invention, the majority of the flow light emitted by each source is used in the light beam produced by the module, to achieve the dual function of lighting regulatory framework, preferably the "road" function and the "Code" ..

Selon un mode de réalisation préféré, cet agencement consiste à ce que les deux sources lumineuses sont séparées par un capotage opaque.According to a preferred embodiment, this arrangement consists in that the two light sources are separated by a cowling opaque.

De préférence, les seconds foyers des premier et second réflecteurs elliptiques sont sensiblement confondus.Preferably, the second foci of the first and second elliptical reflectors are substantially merged.

Avantageusement, ladite surface plane horizontale de réflexion, dont la face supérieure est réfléchissante, est constituée d'une pièce transparente portant un revêtement réfléchissant.Advantageously, said flat horizontal plane of reflection, whose upper surface is reflective, consists of a piece transparent with a reflective coating.

Cette caractéristique permet de limiter le trou ou zone morte de lumière correspondant à l'image de l'épaisseur de cette face réfléchissante par le faisceau lumineux réflechi par le premier réflecteur à l'épaisseur dudit revêtement réfléchissant qui peut être réalisé par un dépôt sous vide d'aluminium par exemple qui est d'une épaisseur comprise entre environ 500 nm et environ quelques micromètres, de l'ordre de grandeur de quelques longueurs d'onde visible.This characteristic makes it possible to limit the hole or dead zone of light corresponding to the image of the thickness of this face reflective by the light beam reflected by the first reflector to the thickness of said reflective coating which can be realized by a vacuum deposit of 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.

De plus, cette pièce transparente a également une fonction optique relativement au faisceau optique réfléchi par le second réflecteur. En effet, elle est traversée par ce faisceau.In addition, this transparent part also has a function optical relative to the optical beam reflected by the second reflector. Indeed, it is crossed by this beam.

Afin de limiter les pertes optiques à cette traversée, de préférence, ladite pièce transparente comporte une face inférieure sphérique centrée sur le second foyer du second réflecteur elliptique.In order to limit the optical losses at this crossing, preferably, said transparent piece has a lower face spherical centered on the second focus of the second elliptical reflector.

Ainsi les rayons de lumière émis par réflexion sur le second réflecteur sont normaux à cette face inférieure.Thus the rays of light emitted by reflection on the second Reflector are normal to this underside.

De préférence, la surface sensiblement elliptique du premier réflecteur est formée par un secteur angulaire de pièce sensiblement de révolution, autour de l'axe optique longitudinal, et en ce que ce secteur angulaire s'étend verticalement au-dessus de la surface plane du réflecteur.Preferably, the substantially elliptical surface of the first reflector is formed by an angular sector substantially of revolution, around the longitudinal optical axis, and in that this sector angle extends vertically above the flat surface of the reflector.

De préférence, la surface sensiblement elliptique du second réflecteur est formée par un secteur angulaire de pièce sensiblement de révolution, autour d'un axe dit de révolution. Preferably, the substantially elliptical surface of the second reflector is formed by an angular sector substantially of revolution, around an axis called revolution.

Et avantageusement, l'axe optique du premier réflecteur et l'axe de révolution du second réflecteur sont sécants.And advantageously, the optical axis of the first reflector and the axis of revolution of the second reflector are secant.

Selon d'autres caractéristiques de l'invention :

  • la surface plane du réflecteur peut s'étendre longitudinalement vers l'arrière, depuis son bord de coupure, au moins jusqu'au voisinage du premier foyer du réflecteur ;
  • la source lumineuse associée au premier réflecteur est agencée dans le module de manière que son axe de diffusion lumineuse soit sensiblement perpendiculaire à la surface plane de ce réflecteur ;
  • le bord de coupure de la surface plane du premier réflecteur a un profil courbe, dans le plan horizontal, de manière à suivre globalement la courbure du plan focal de la lentille.
According to other features of the invention:
  • the flat surface of the reflector may extend longitudinally rearwardly from its cutting edge at least to the vicinity of the first focus of the reflector;
  • the light source associated with the first reflector is arranged in the module so that its light scattering axis is substantially perpendicular to the flat surface of this reflector;
  • the cutting edge of the flat surface of the first reflector has a curved profile, in the horizontal plane, so as to follow the overall curvature of the focal plane of the lens.

L'invention concerne également un projecteur d'éclairage de véhicule automobile comportant au moins un module d'éclairage tel que précédemment précisé et destiné à une double fonction d'éclairage.The invention also relates to a lighting projector of motor vehicle having at least one lighting module such as previously specified and intended for a dual lighting function.

De préférence, cette double fonction comprend la fonction d'éclairage en mode « code » et la fonction d'éclairage en mode « route ».Preferably, this dual function includes the function lighting in "code" mode and the lighting function in "Road".

D'autres caractéristiques et avantages de l'invention apparaítront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés parmi lesquels :

  • la figure 1 est une vue en coupe verticale qui représente schématiquement un mode de réalisation préféré du module d'éclairage selon l'invention ;
  • la figure 2 est une vue en perspective qui représente partiellement ce mode de réalisation préféré du module d'éclairage selon l'invention ;
  • la figure 3 est une vue de dessus qui représente schématiquement le module d'éclairage de la figure 1 ;
  • la figure 4 est une vue de côté qui illustre schématiquement le trajet des rayons lumineux dans le module d'éclairage de la figure 1 ;
  • la figure 5 est une vue similaire à celle de la figure 2 qui représente un deuxième mode de réalisation du module d'éclairage selon l'invention ;
  • la figure 6 est une vue similaire à celle de la figure 2 qui représente une variante de réalisation du module d'éclairage de la figure 1 comportant plusieurs diodes électroluminescentes ;
  • la figure 7 est une vue avant qui représente schématiquement un projecteur d'éclairage de véhicule comportant des modules d'éclairage selon l'invention et réalisant un faisceau d'éclairage réglementaire de croisement ;
  • la figure 8 est une vue en perspective schématique du module d'éclairage représenté sur la figure 1 ;
  • la figure 9 est une représentation schématique d'une image de la projection du faisceau de lumière émis par le module, selon un premier mode de fonctionnement du module conforme à l'invention
  • la figure 10 est une représentation schématique d'une image de la projection du faisceau de lumière émis par le module, selon un second mode de fonctionnement du module conforme à l'invention.
Other features and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings among which:
  • Figure 1 is a vertical sectional view which schematically shows a preferred embodiment of the lighting module according to the invention;
  • FIG. 2 is a perspective view which partially represents this preferred embodiment of the lighting module according to the invention;
  • Figure 3 is a top view which schematically shows the lighting module of Figure 1;
  • Fig. 4 is a side view which schematically illustrates the path of the light rays in the illumination module of Fig. 1;
  • Figure 5 is a view similar to that of Figure 2 which shows a second embodiment of the lighting module according to the invention;
  • Figure 6 is a view similar to that of Figure 2 which shows an alternative embodiment of the lighting module of Figure 1 comprising a plurality of light emitting diodes;
  • Figure 7 is a front view which shows schematically a vehicle lighting projector comprising lighting modules according to the invention and providing a regulatory lighting beam crossover;
  • Fig. 8 is a schematic perspective view of the illumination module shown in Fig. 1;
  • FIG. 9 is a schematic representation of an image of the projection of the light beam emitted by the module, according to a first mode of operation of the module according to the invention.
  • Figure 10 is a schematic representation of an image of the projection of the light beam emitted by the module, according to a second mode of operation of the module according to the invention.

On a représenté schématiquement sur la figure 1 un module d'éclairage 10 qui est réalisé conformément aux enseignements de l'invention.FIG. 1 schematically shows a module lighting 10 which is made in accordance with the teachings of the invention.

De manière classique, le module d'éclairage 10 comporte, agencés d'arrière en avant suivant un axe optique longitudinal horizontal A-A, un premier réflecteur 12 du type elliptique, une première source lumineuse 14 qui est agencée au voisinage d'un premier foyer F1 du premier réflecteur 12, et une lentille convergente 16 dont le plan focal est agencé au voisinage du second foyer F2 du premier réflecteur 12.In a conventional manner, the lighting module 10 comprises, arranged from rear to front along a horizontal longitudinal optical axis A-A, a first reflector 12 of the elliptical type, a first source 14 which is arranged in the vicinity of a first focus F1 of 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.

Le premier réflecteur 12 et la lentille 16 forment une partie du système optique du module d'éclairage 10.The first reflector 12 and the lens 16 form part of the optical system of the lighting module 10.

L'axe optique A-A définit ici, à titre non limitatif, une direction longitudinale horizontale et une orientation d'arrière en avant, qui correspond à une orientation de gauche à droite sur les figures. L'axe optique A-A est par exemple sensiblement parallèle à l'axe longitudinal d'un véhicule (non représenté) équipé du module d'éclairage 10.The optical axis A-A defines here, in a non-limiting way, a direction longitudinal axis and a back-to-front orientation, which corresponds to a left-to-right orientation in the figures. The axis optical A-A is for example substantially parallel to the longitudinal axis of a vehicle (not shown) equipped with the lighting module 10.

Dans la suite de la description, à titre non limitatif, on utilisera une orientation verticale qui correspond à une orientation de haut en bas sur la figure 1.In the following description, without limitation, we will use a vertical orientation that corresponds to a top-to-bottom orientation in Figure 1.

La lentille convergente 16 est ici une pièce de révolution autour de l'axe optique longitudinal A-A. La lentille 16 comporte, en vis-à-vis du premier réflecteur 12, une surface d'entrée transversale 17 pour les rayons lumineux.The convergent lens 16 is here a piece of revolution around of the longitudinal optical axis A-A. The lens 16 has, vis-à-vis the first reflector 12, a transverse input surface 17 for the light rays.

Selon le mode de réalisation représenté ici, le premier réflecteur 12 comporte une surface elliptique 18 qui est réalisée sous la forme d'un secteur angulaire de pièce sensiblement de révolution, et qui s'étend dans le demi espace situé au-dessus d'un plan axial horizontal passant par l'axe optique longitudinal A-A.According to the embodiment shown here, the first reflector 12 has an elliptical surface 18 which is in the form of a substantially angular sector of revolution, and which extends in the half space above a passing horizontal axial plane by the longitudinal optical axis A-A.

La face interne 20 de la surface elliptique 18 est réfléchissante.The inner face 20 of the elliptical surface 18 is reflective.

On note que la surface elliptique 18 peut ne pas être parfaitement elliptique et elle peut avoir plusieurs profils spécifiques prévus pour optimiser la répartition lumineuse dans le faisceau d'éclairage produit par le module 10, selon la fonction d'éclairage « code » réalisée par le module 10. Ceci implique donc que le réflecteur ne soit pas parfaitement de révolution.It is noted that the elliptical surface 18 may not be perfectly elliptical and she can have several specific profiles planned for optimize the light distribution in the product beam by the module 10, according to the lighting function "code" performed by the module 10. This implies that the reflector is not perfectly of revolution.

Conformément aux enseignements de l'invention, le premier réflecteur 12 comporte une surface plane horizontale 22 dont la face supérieure 24 est réfléchissante.In accordance with the teachings of the invention, the first reflector 12 has a horizontal flat surface 22 whose face upper 24 is reflective.

Le premier réflecteur 12 délimite un volume de réflexion pour les rayons lumineux émis par la première source 14, c'est à dire un volume dans lequel les rayons lumineux sont émis et dans lequel les rayons lumineux se réfléchissent. Ce volume de réflexion est délimité, dans sa partie supérieure, par la face interne de réflexion 20 de la surface elliptique 18, et verticalement vers le bas par la face réfléchissante 24 de la surface plane 22.The first reflector 12 delimits a reflection volume for the light rays emitted by the first source 14, ie a volume in which the light rays are emitted and in which the rays bright are reflected. This volume of reflection is delimited, in its upper part, by the internal surface of reflection 20 of the surface elliptical 18, and vertically downwardly by the reflecting face 24 of the flat surface 22.

La surface plane 22 s'étend ici dans un plan axial horizontal.The flat surface 22 extends here in a horizontal axial plane.

Les figures 2 à 7 représentent uniquement ce premier réflecteur 12, la lentille 16 et la surface plane 22. Figures 2 to 7 represent only this first reflector 12, the lens 16 and the flat surface 22.

La surface plane 22 est délimitée, à l'arrière, à son intersection avec la surface elliptique 18, par un bord elliptique 26, et à l'avant, par un bord d'extrémité longitudinale avant 28. On peut prévoir en variante que la surface plane 22 soit délimitée à l'arrière par un segment de droite perpendiculaire à l'axe A-A et passant au voisinage immédiat de la source 14, en avant de cette dernière.The flat 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 longitudinal end edge before 28. It can be provided alternatively that the flat surface 22 is delimited at the rear by a segment of perpendicular to the axis A-A and passing in the immediate vicinity of the source 14, in front of the latter.

Le bord d'extrémité avant 28 de la surface plane 22 est agencé au voisinage du second foyer F2 du réflecteur 12, de manière à former une coupure suffisamment nette dans le faisceau d'éclairage produit par le module d'éclairage 10.The front end edge 28 of the flat surface 22 is arranged at the near the second focus F2 of the reflector 12, so as to form a sufficiently sharp cut in the lighting beam produced by the lighting module 10.

Dans la suite de la description, on désignera donc ce bord d'extrémité avant 28 par « bord de coupure 28 ».In the following description, we will designate this edge front end 28 by "cutting edge 28".

Le plan focal de la lentille 16, dans un plan horizontal passant par le foyer F2 de la lentille 16, forme un profil courbe, concave vers l'avant. Selon le mode de réalisation, la forme courbe de ce profil est plus ou moins complexe, et peut s'apparenter en première approximation à un arc de cercle. Par conséquent, de préférence, le bord de coupure 28 a un profil courbe, dans le plan horizontal, de manière à suivre globalement le profil du plan focal de la lentille 16.The focal plane of the lens 16, in a horizontal plane passing through the focus F2 of the lens 16, forms a curved profile, concave forward. According to the embodiment, the curved shape of this profile is more or less complex, and can be likened in a first approximation to a arc. Therefore, preferably, the cutoff edge 28a a curved profile, in the horizontal plane, so as to follow overall the profile of the focal plane of the lens 16.

Selon le mode de réalisation représenté ici, la surface plane réfléchissante 22 comporte un tronçon arrière 30 semi-ellipsoïdal, qui est délimité par le bord elliptique 26, et par le diamètre 32 du bord avant 34 semi-circulaire de la surface elliptique 18.According to the embodiment shown here, the flat surface reflective 22 has a semi-ellipsoidal rear portion 30, which is delimited by the elliptical edge 26, and by the diameter 32 of the front edge 34 semi-circular of the elliptical surface 18.

La surface plane réfléchissante 22 comporte un tronçon avant 36 globalement trapézoïdal isocèle, qui est délimité par le diamètre 32 de la surface elliptique 18, par deux bords latéraux 38, 40, et par le bord de coupure 28.The reflecting flat surface 22 has a front section 36 overall isosceles trapezoidal, which is delimited by the diameter 32 of the elliptical surface 18, by two lateral edges 38, 40, and by the edge of cutoff 28.

Selon le mode de réalisation représenté ici, la largeur transversale du tronçon avant 36 augmente progressivement vers l'avant, de manière que la largeur transversale du bord de coupure 28 soit sensiblement égale au diamètre de la surface d'entrée de la lentille 16.According to the embodiment shown here, the width cross-section of the front section 36 progressively increases towards the front, so that the transverse width of the cutting edge 28 substantially equal to the diameter of the entrance surface of the lens 16.

Selon une variante de réalisation tel que représentée sur la figure 3, la surface plane 22 peut comporter uniquement un tronçon avant 36, qui s'étend axialement vers l'arrière, depuis le bord de coupure 28 jusqu'à un point déterminé de l'axe optique A-A situé entre le premier F1 et le second F2 foyers du réflecteur 12.According to an alternative embodiment as shown in FIG. 3, the flat surface 22 may comprise only a front section 36, which extends axially rearwards from the cutting edge 28 up to a certain point in the optical axis A-A between the first F1 and the second F2 foci of the reflector 12.

Avantageusement, la source lumineuse 14 est prévue pour émettre son énergie lumineuse dans moins d'un « demi-espace » situé au-dessus de la surface plane 22, et pour émettre son énergie lumineuse vers la face interne 20 de la surface elliptique 18.Advantageously, the light source 14 is provided for emit light energy in less than one "half-space" above the flat surface 22, and to emit its light energy towards the inner face 20 of the elliptical surface 18.

Avantageusement, la source lumineuse 14 est une diode électroluminescente encapsulée 44.Advantageously, the light source 14 is a diode electroluminescent encapsulated 44.

On désigne ici par diode électroluminescente 44, la jonction qui produit l'énergie lumineuse ainsi que le globe, ou la capsule, de diffusion lumineuse, qui enveloppe la partie supérieure de la jonction.Here is meant by light emitting diode 44, the junction which produces light energy as well as globe, or capsule, diffusion bright, which envelops the upper part of the junction.

Classiquement, la diode électroluminescente 44 est montée sur une plaque électronique de support 42, qui est représentée sur la figure 4, et qui est agencée ici parallèlement sous la surface plane 22.Conventionally, the light-emitting diode 44 is mounted on an electronic support plate 42, which is shown in FIG. 4, and which is arranged here parallel to the flat surface 22.

La diode électroluminescente 44 comporte un axe de diffusion lumineuse B-B qui est ici sensiblement perpendiculaire à la surface plane 22.The light-emitting diode 44 has a diffusion axis luminous B-B which is here substantially perpendicular to the surface plane 22.

La diode électroluminescente 44 émet son énergie lumineuse dans un angle solide globalement centré autour de son axe de diffusion lumineuse B-B, et inférieur à 180 degrés.The light-emitting diode 44 emits its light energy in a solid angle globally centered around its diffusion axis bright B-B, and less than 180 degrees.

Cet agencement permet à la diode 44 d'émettre la majorité de son énergie lumineuse vers la face interne 20 de la surface elliptique 18.This arrangement allows the diode 44 to emit the majority of its light energy towards the inner face 20 of the elliptical surface 18.

Le principe du fonctionnement du module d'éclairage 10 selon l'invention est le suivant.The principle of operation of the lighting module 10 according to the invention is as follows.

On suppose que la source lumineuse 14 est de faible étendue autour d'un point confondu avec le premier foyer F1 du réflecteur elliptique 18.It is assumed that the light source 14 is of small extent around a point coincides with the first focus F1 of the reflector elliptical 18.

Dans un premier temps, on considère les rayons lumineux émis par la source lumineuse 14 qui passent au-dessus du bord de coupure 28, et qui seront désignés par rayons primaires R1.At first, we consider the light rays emitted by the light source 14 which pass over the cutoff edge 28, which will be designated by primary radii R1.

Comme la source lumineuse 14 est agencée au premier foyer F1 du réflecteur elliptique 18, la majeure partie des rayons primaires R1 émis par la source 14, après s'être réfléchie sur la face interne 20 de la surface elliptique 18, est renvoyée vers le second foyer F2 du réflecteur 18, ou au voisinage de celui-ci.Since 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 of it.

Ces rayons lumineux primaires R1 forment, au foyer F2 de la lentille 16, une image lumineuse concentrée qui est projetée, à l'avant du module d'éclairage 10, par la lentille 16, selon une direction sensiblement parallèle à l'axe longitudinal A-A, mais orientée vers le bas.These primary light rays R1 form, at the focus F2 of the lens 16, a concentrated bright image that is projected, at the front of the lighting module 10, by the lens 16, in one direction substantially parallel to the longitudinal axis A-A, but oriented towards the low.

Dans un deuxième temps, on considère les rayons lumineux R2 émis par la source 14 qui passeraient au-dessous du bord de coupure 28, s'il n'y avait pas la surface plane 22, et qui seront désignés par rayons secondaires R2.In a second step, we consider the light rays R2 emitted by the source 14 that would pass below the cutoff edge 28, if there was no flat surface 22, and which will be designated by secondary rays R2.

Ces rayons lumineux secondaires R2 sont réfléchis par la face interne 20 de la surface elliptique 18 vers la surface plane réfléchissante 22, de sorte qu'ils se réfléchissent une seconde fois vers l'avant.These secondary light rays R2 are reflected by the face internal 20 of the elliptical surface 18 to the reflecting flat surface 22, so that they are reflected a second time forward.

Lors de cette seconde réflexion, les rayons lumineux secondaires R2 sont transmis vers la partie supérieure de la surface d'entrée 17 de la lentille 16. Par conséquent, du fait de ses propriétés de convergence, la lentille 16 dévie les rayons lumineux secondaires R2 vers le bas. Les rayons lumineux secondaires R2 sont donc émis sous la coupure dans le faisceau d'éclairage, dans la même zone que celle dans laquelle sont émis les rayons R1.During this second reflection, secondary light rays R2 are transmitted to the upper part of the entry surface 17 of the 16. Therefore, because of its convergence properties, the lens 16 deflects the secondary light rays R2 downwards. The secondary light rays R2 are thus emitted under the cut in the lighting beam, in the same area in which are emitted the rays R1.

Plus le lieu de réflexion sur la surface plane 22 d'un rayon lumineux secondaire R2 est proche du bord de coupure 28, donc proche du plan focal de la lentille 16, plus la direction de ce rayon lumineux secondaire R2, à la sortie de la lentille 16, est proche d'une direction parallèle à l'axe longitudinal A-A.Plus the place of reflection on the flat surface 22 of a radius secondary bright R2 is close to the cutoff edge 28, so close of the focal plane of the lens 16, plus the direction of this light ray secondary R2, at the exit of the lens 16, is close to a direction parallel to the longitudinal axis A-A.

Un avantage du module d'éclairage 10 selon l'invention est que son système optique 11 n'occulte pas une partie importante des rayons lumineux émis par la source 14, comme c'est le cas dans un module d'éclairage classique comportant un cache.An advantage of the lighting module 10 according to the invention is that its optical system 11 does not hide a large part of the rays light emitted by the source 14, as is the case in a module conventional lighting with a cover.

La surface plane réfléchissante 22 permet de « replier » les images de la source lumineuse 14 qui sont réfléchies par la surface elliptique 18 du réflecteur 12 au second foyer F2 du réflecteur 12. The reflecting flat surface 22 makes it possible to "fold" the images of light source 14 that are reflected by the surface elliptical 18 of the reflector 12 to the second focus F2 of the reflector 12.

En effet, en l'absence de la surface plane 22, certaines de ces images devraient chevaucher la limite formée par le bord de coupure 28, dans un plan vertical généré par le bord de coupure 28. Chaque image comporterait alors une portion supérieure située au-dessus du bord de coupure 28 et une portion inférieure située au-dessous du bord de coupure 28. Grâce à la surface plane réfléchissante 22, la portion inférieure de chaque image est réfléchie vers le haut, comme si la portion inférieure était repliée sur la portion supérieure, de sorte que ces portions d'image se superposent au-dessus du bord de coupure 28, dans le plan vertical généré par le bord de coupure 28.Indeed, in the absence of the flat surface 22, some of these images should overlap the limit formed by the cutoff edge 28, in a vertical plane generated by the cutting edge 28. Each image would then have an upper portion above the edge of cut-off 28 and a lower portion below the edge of 28. Thanks to the flat reflective surface 22, the portion bottom of each image is reflected upward, as if the lower portion was folded over the upper portion, so that these portions of the image are superimposed above the cutoff edge 28, in the vertical plane generated by the cutoff edge 28.

Le « pli » formé par ce « repliement » d'images contribue à former une coupure nette dans le faisceau d'éclairage projeté par la lentille 16.The "fold" formed by this "folding" of images helps to form a clear cut in the light beam projected by the lens 16.

Le module d'éclairage 10 selon l'invention présente aussi des avantages particuliers, dans le cadre de l'utilisation d'une diode électroluminescente 44 comme source lumineuse 14 dans un module d'éclairage.The lighting module 10 according to the invention also has particular advantages, in the context of the use of a diode electroluminescent 44 as a light source 14 in a module lighting.

En effet, l'image de la source virtuelle correspondant à une diode est généralement ronde et diffuse.Indeed, the image of the virtual source corresponding to a diode is usually round and diffuse.

Pour réaliser une coupure dans un faisceau d'éclairage, à partir d'un module d'éclairage utilisant une source lumineuse et une optique de Fresnel, ou utilisant une source lumineuse et un réflecteur du type à surface complexe, il est nécessaire d'aligner les bords des images de la source lumineuse sur l'écran de mesure servant à valider le faisceau d'éclairage réglementaire.To make a break in a lighting beam, from of a lighting module using a light source and an optical Fresnel, or using a light source and reflector type to complex surface, it is necessary to align the edges of the images of the light source on the measurement screen used to validate the beam regulatory lighting.

Lorsque la source lumineuse est un filament, son image virtuelle a globalement la forme d'un rectangle, de sorte qu'il est relativement facile de réaliser une coupure nette en alignant les bords des rectangles.When the light source is a filament, its virtual image has globally the shape of a rectangle, so that it is relatively easy to make a clean cut by aligning the edges of the rectangles.

Lorsque la source lumineuse est une diode, il est beaucoup plus difficile de réaliser une coupure nette en alignant les images correspondantes, de formes rondes.When the light source is a diode, it is much more difficult to make a clean cut by aligning the images corresponding, round shapes.

Cette difficulté pourrait être surmontée en utilisant un diaphragme avec la diode, mais on perdrait alors une quantité importante de l'énergie lumineuse produite par la diode. This difficulty could be overcome by using a diaphragm with the diode, but then we would lose a significant amount of the light energy produced by the diode.

Le module d'éclairage 10 selon l'invention permet de réaliser une coupure nette avec une diode 44, car il projette à l'avant l'image d'une arête du système optique 11, c'est à dire l'image du bord de coupure 28.The lighting module 10 according to the invention makes it possible to clear cut with a diode 44, because it projects to the front the image of a edge of the optical system 11, ie the image of the cutoff edge 28.

La forme de la coupure dans le faisceau d'éclairage est donc déterminée par le profil du bord de coupure 28, dans une projection sur un plan vertical et transversal.The shape of the cut in the lighting beam is therefore determined by the profile of the cutting edge 28, in a projection on a vertical and transverse plane.

Une autre difficulté pour la réalisation d'un module d'éclairage à partir d'une diode provient du fait que la répartition de l'énergie lumineuse dans le faisceau lumineux émis par la diode n'est pas homogène. Par conséquent, il est très difficile de réaliser un faisceau d'éclairage homogène à partir des images directes de la diode.Another difficulty for the realization of a lighting module to from a diode comes from the fact that the distribution of energy light in the light beam emitted by the diode is not homogeneous. Therefore, it is very difficult to achieve a beam homogeneous lighting from the direct images of the diode.

Le module d'éclairage 10 selon l'invention surmonte cette difficulté en exploitant une propriété des modules d'éclairage elliptiques qui est de « mélanger » les images de la source lumineuse au second foyer F2 du réflecteur 12, ce qui améliore l'homogénéité du faisceau d'éclairage produit.The lighting module 10 according to the invention overcomes this difficulty in exploiting a property of elliptical lighting modules which is to "mix" the images of the light source to the second focal point F2 of the reflector 12, which improves the homogeneity of the beam lighting product.

Un avantage du module d'éclairage 10 selon l'invention est qu'il exploite la propriété des diodes encapsulées 44 d'émettre globalement dans un demi espace, ce qui permet de capter plus de quatre-vingt pourcents du flux lumineux émis par la diode 44, alors que, dans un projecteur elliptique code traditionnel, on capte moins de cinquante pourcents du flux lumineux.An advantage of the lighting module 10 according to the invention is that it exploits the property of encapsulated diodes 44 to emit globally in a half space, which captures over eighty percent of the luminous flux emitted by the diode 44, whereas in a traditional code elliptical projector, we capture less than fifty percent of the luminous flux.

Selon un premier mode de réalisation, qui est représenté schématiquement sur les figures 2 à 4, le module d'éclairage 10 est réalisé par un assemblage d'éléments discrets.According to a first embodiment, which is represented schematically in FIGS. 2 to 4, the lighting module 10 is achieved by an assembly of discrete elements.

Le module d'éclairage 10 comporte, par exemple, un élément 18 formant la partie elliptique du réflecteur 12, un élément 22 formant la surface plane du réflecteur 12, et un élément 16 formant la lentille convergente.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 lens convergent.

La face interne de la partie elliptique 18 et la face supérieure de la surface plane 22 sont par exemple revêtues d'un matériau réfléchissant.The inner face of the elliptical portion 18 and the upper face of the flat surface 22 are for example coated with a material reflective.

Dans le cas où la source lumineuse 14 est une diode électroluminescente 44, compte tenu de la faible dissipation thermique de ce type de source, par rapport à des lampes, il est possible de réaliser les éléments discrets sous forme de pièces en polymères, assemblées par exemple par emboítement.In the case where the light source 14 is a diode electroluminescent 44, given the low heat dissipation of this type of source, compared to lamps, it is possible to realize the discrete elements in the form of polymer parts, assembled for example by interlocking.

La lentille 16 peut être une lentille de Fresnel.The lens 16 may be a Fresnel lens.

Selon un autre mode de réalisation de l'invention, qui est représenté schématiquement sur la figure 5, le système optique 11 du module d'éclairage 10 est réalisé en une seule pièce optique pleine, en matériau transparent, par exemple du PMMA (polymétacrylate de méthyle).According to another embodiment of the invention, which is schematically shown in FIG. 5, the optical system 11 of FIG. lighting module 10 is made in one solid optical part, in transparent material, for example PMMA (polymethacrylate) methyl).

La pièce optique pleine est par exemple réalisée par moulage, ou par usinage.The solid optical part is for example made by molding, or by machining.

Pour permettre la réflexion des rayons lumineux émis par la source 14 dans le volume de réflexion délimité par le réflecteur 12, la surface externe de la partie elliptique 18 du réflecteur 12 et la surface externe, ici inférieure, de la surface plane 22 du réflecteur 12 sont revêtues d'un matériau réfléchissant.To allow reflection of the light rays emitted by the source 14 in the reflection volume delimited by the reflector 12, the outer surface of the elliptical portion 18 of the reflector 12 and the surface outer, here below, the flat surface 22 of the reflector 12 are coated with a reflective material.

Pour certaines portions du réflecteur 12, on peut utiliser les propriétés de réflexion totale dans un milieu d'indice supérieur à l'air pour provoquer la réflexion des rayons lumineux dans le volume de réflexion délimité par le réflecteur 12, sans utiliser de matériau réfléchissant. Ces portions du réflecteur 12 auront alors une forme légèrement différente de celle d'un ellipsoïde pur.For certain portions of the reflector 12, it is possible to use the total reflection properties in an index medium greater than air to cause the reflection of light rays in the volume of reflection delimited by the reflector 12, without using any material reflective. These portions of the reflector 12 will then have a shape slightly different from that of a pure ellipsoid.

Selon ce deuxième mode de réalisation, les rayons lumineux qui sont émis par la source lumineuse 14 se propagent à l'intérieur du matériau constituant le système optique 11 du module d'éclairage 10, puis ils sortent du système optique 11 par la face avant de la lentille convergente 16.According to this second embodiment, 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 come out of the optical system 11 through the front of the lens convergent 16.

Le fait que les rayons lumineux se propagent à l'intérieur d'un matériau, dans le deuxième mode de réalisation, alors que les rayons lumineux se propagent dans l'air, dans le premier mode de réalisation, n'a pas d'influence notable sur le principe du fonctionnement du module d'éclairage 10 selon l'invention. The fact that light rays propagate inside a material, in the second embodiment, while the spokes luminous propagate in the air, in the first embodiment, has no significant influence on the principle of module operation lighting 10 according to the invention.

Avantageusement, la surface plane réfléchissante 22 comporte une cavité de forme complémentaire à la capsule de la diode électroluminescente 44.Advantageously, the reflecting flat surface 22 comprises a cavity of complementary shape to the capsule of the diode electroluminescent 44.

Par exemple, si la capsule de la diode 44 a une forme hémisphérique, la cavité est sensiblement hémisphérique.For example, if the capsule of diode 44 has a shape hemispherical, the cavity is substantially hemispherical.

Selon une variante de ce deuxième mode de réalisation, le réflecteur 12 est réalisé en une seule pièce en matériau transparent, qui est distincte de la pièce formant la lentille convergente 16.According to a variant of this second embodiment, the reflector 12 is made of a single piece of transparent material, which is distinct from the piece forming the convergent lens 16.

Selon une variante de réalisation de l'invention, qui est représentée sur la figure 6, la source lumineuse 14 peut être réalisée au moyen de plusieurs diodes électroluminescentes 44.According to an alternative embodiment of the invention, which is shown in FIG. 6, the light source 14 can be realized at by means of a plurality of light-emitting diodes 44.

On note que les diodes électroluminescentes 44 doivent être très proches les unes des autres, de manière qu'elles soient agencées globalement au premier foyer F1 du réflecteur 12.It should be noted that the light-emitting diodes 44 must be very close to each other, so that they are arranged overall to the first focus F1 of the reflector 12.

Par exemple, conformément à la figure 6, deux diodes 44 sont alignées, avantageusement selon une direction perpendiculaire à l'axe optique longitudinal A-A.For example, according to FIG. 6, two diodes 44 are aligned, advantageously in a direction perpendicular to the axis longitudinal optical A-A.

La source lumineuse 14 résultante est alors équivalente à une source lumineuse étendue en largueur, car les faisceaux d'éclairage produits par chaque diode électroluminescente 44 se recouvrent.The resulting light source 14 is then equivalent to a light source extended in width because the light beams produced by each light-emitting diode 44 overlap.

Cet agencement des diodes 44 permet donc d'élargir le faisceau lumineux produit par le module d'éclairage 10.This arrangement of the diodes 44 thus makes it possible to widen the beam light produced by the lighting module 10.

Avantageusement, pour réaliser une fonction d'éclairage réglementaire, à coupure, par exemple une fonction d'éclairage « code », on réalise un projecteur de véhicule au moyen de plusieurs modules d'éclairage 10 identiques fonctionnant simultanément.Advantageously, to achieve a lighting function regulatory, cut-off, for example a "code" lighting function, a vehicle headlamp is made by means of several modules identical lighting systems operating simultaneously.

Les modules d'éclairage 10 sont agencés en parallèle, c'est à dire que leurs axes optiques A-A sont sensiblement parallèles entre eux.The lighting modules 10 are arranged in parallel, that is to say that their optical axes A-A are substantially parallel to each other.

Ainsi, les faisceaux d'éclairage produits par chacun des modules d'éclairage 10 se superposent à l'avant du véhicule de manière à former le faisceau d'éclairage réglementaire à coupure.Thus, the lighting beams produced by each of the modules 10 are superimposed on the front of the vehicle so as to form the regulatory lighting beam with cut-off.

A titre d'exemple, on a représenté sur la figure 7 un projecteur 46 de véhicule qui réalise une fonction de codes, et qui utilise quatre modules d'éclairage 10 identiques. For example, there is shown in Figure 7 a projector 46 vehicle that performs a code function, and that uses four identical lighting modules 10.

Comme le faisceau d'éclairage de croisement doit comporter une coupure présentant une partie inclinée d'un angle déterminé, par exemple quinze degrés, deux modules d'éclairage 48 du projecteur 46 sont tournés de quinze degrés, autour de leur axe optique longitudinal A-A, de manière à réaliser un faisceau d'éclairage comportant une coupure inclinée de quinze degrés par rapport à un plan horizontal.As the crossing light beam must have a cut having an inclined portion of a given angle, by example fifteen degrees, two lighting modules 48 of the projector 46 are rotated fifteen degrees, about their longitudinal optical axis A-A, in order to realize a lighting beam including a cut tilted fifteen degrees from a horizontal plane.

Les deux autres modules d'éclairage 50 forment un faisceau d'éclairage présentant une coupure horizontale.The other two lighting modules 50 form a beam lighting having a horizontal cut.

La superposition des faisceaux d'éclairage produits par les quatre modules d'éclairage 10 forme alors un faisceau d'éclairage réglementaire présentant une partie horizontale et une partie inclinée de quinze degrés.The superposition of the lighting beams produced by the four lighting modules 10 then forms a lighting beam with a horizontal part and an inclined part of fifteen degrees.

Selon une variante de réalisation (non représentée) de l'invention, la source lumineuse 14 peut être formée par l'extrémité libre d'un faisceau de fibre optique.According to an alternative embodiment (not shown) of the invention, the light source 14 may be formed by the free end of a fiber optic bundle.

Un inconvénient des fibres optiques est qu'elles forment une source lumineuse comportant un coeur lumineux et un anneau sombre, dû à la gaine entourant le coeur de la fibre.A disadvantage of optical fibers is that they form a light source having a bright heart and a dark ring, due to the sheath surrounding the heart of the fiber.

Ce type de source lumineuse, lorsqu'il est utilisé dans un projecteur d'éclairage de véhicule utilisant par exemple un réflecteur du type à surface complexe, forme donc, dans le faisceau d'éclairage, des images sous forme de pixels entourés par une aire sombre, due à la gaine.This type of light source, when used in a vehicle lighting projector using for example a reflector of type with a complex surface, thus forms, in the lighting beam, images in the form of pixels surrounded by a dark area, due to the sheath.

Un avantage du module d'éclairage 10 selon l'invention est qu'il permet de mélanger toutes les images de la source lumineuse 14 au second foyer F2 du réflecteur 12, de sorte qu'on ne retrouve pas dans le faisceau d'éclairage les pixels de la fibre optique.An advantage of the lighting module 10 according to the invention is that it allows to mix all the images of the light source 14 with second focus F2 of the reflector 12, so that we do not find in the lighting beam the pixels of the optical fiber.

Revenons maintenant à la figure 1, associée à la figure 8. En plus, de ce qui a déjà été décrit précisément ci-dessus, afin de remplir une double fonction, à savoir la fonction « code » mais également la fonction « route », le module conforme à l'invention, destiné à équiper un projecteur d'éclairage de véhicule automobile, comporte également agencés d'arrière en avant globalement suivant l'axe optique horizontal longitudinal A-A, un second réflecteur 12' du type elliptique qui délimite un volume de réflexion pour des rayons lumineux et qui comporte une surface sensiblement elliptique de réflexion 18', 20', une seconde source lumineuse 14' qui est agencée au voisinage d'un premier foyer F1' du second réflecteur 12'. Cette seconde source lumineuse 14' est agencée de sorte à émettre un faisceau lumineux unique vers le bas.Now back to Figure 1, associated with Figure 8. In more, from what has already been described precisely above, in order to fill a dual function, namely the "code" function but also the function "road", the module according to the invention, intended to equip a automotive vehicle lighting projector, also features arranged from rear to front globally along the horizontal optical axis longitudinal A-A, 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 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.

Le second réflecteur 18' et la seconde source lumineuse 14' peuvent être similaires au premier réflecteur 18 et la première source lumineuse 14. Ils peuvent donc présenter toutes les caractéristiques correspondantes déjà mentionnées plus haut, sans que celles-ci soient reprises ici explicitement.The second reflector 18 'and the second light source 14' can be similar to the first reflector 18 and the first source 14. They can therefore have all the characteristics correspondents already mentioned above, without these being repeated here explicitly.

Pour ce faire, les deux sources de lumière 14, 14' à commande sélective qui sont de préférence deux diodes électroluminescentes ou deux ensembles de diodes électroluminescentes, sont séparés d'un capotage opaque 60 qui éventuellement peut contenir un radiateur et des circuits de commande.To do this, the two light sources 14, 14 'to control which are preferably two light-emitting diodes or two sets of light-emitting diodes, are separated from one opaque cover 60 which possibly can contain a radiator and control circuits.

Comme on l'a déjà vu plus haut, la surface sensiblement elliptique du premier réflecteur 12 est formée par un secteur angulaire de pièce sensiblement de révolution, autour de l'axe optique longitudinal A-A, et ce secteur angulaire s'étend verticalement au-dessus de la surface plane 22 du réflecteur.As already seen above, the substantially elliptical surface of the first reflector 12 is formed by an angular sector of the room substantially of revolution about the longitudinal optical axis A-A, and this angular sector extends vertically above the flat surface 22 of the reflector.

La surface sensiblement elliptique du second réflecteur est, quant à elle, formée par un secteur angulaire de pièce sensiblement de révolution, autour de son axe dit de révolution A'- A' et, avantageusement, l'axe optique A-A du premier réflecteur et l'axe de révolution A'- A' du second réflecteur sont sécants.The substantially elliptical surface of the second reflector is to it, formed by an angular sector of a piece substantially of revolution, around its so-called axis of revolution A'- A 'and, advantageously, the optical axis A-A of the first reflector and the axis of revolution A'- A 'of the second reflector are intersecting.

Le second réflecteur elliptique 12' est agencé pour avoir son second foyer sensiblement confondu avec le second foyer F2 du premier réflecteur 12. L'axe optique A-A du premier réflecteur et l'axe de révolution A'- A' du second réflecteur se coupent donc sensiblement en ce second foyer F2.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 A-A of the first reflector and the axis of revolution A'-A 'of the second reflector thus intersect substantially in this second focus F2.

La surface plane horizontale de réflexion 22, dont la face supérieure 24 est réfléchissante, est constituée d'une pièce transparente 22' portant un revêtement réfléchissant sur sa face supérieure et formant la surface supérieure réfléchissante 24. Avantageusement, cette pièce transparente 22' présente une surface inférieure sphérique 22A centrée sensiblement sur le second foyer F2. Sa face latérale 22B tournée vers la lentille 16 est quant à elle avantageusement définie par une surface réglée définie en plan vertical par des droites reliant le bord supérieur 34 du premier réflecteur 12 au second foyer F2.The flat horizontal reflection surface 22, the face of which upper 24 is reflective, consists of a transparent piece 22 'bearing a reflective coating on its upper face and forming the reflective upper surface 24. Advantageously, this piece transparent 22 'has a spherical bottom surface 22A centered substantially on the second focus F2. Its side face 22B turned towards the lens 16 is advantageously defined by a surface defined defined in vertical plane by straight lines connecting the upper edge 34 from the first reflector 12 to the second focus F2.

De préférence, cette pièce transparente 22' est en PMMA (polymétacrylate de méthyle) et le revêtement réfléchissant est constitué d'un dépôt sous vide d'aluminium.Preferably, this transparent piece 22 'is made of PMMA (polymethylmethacrylate) and the reflective coating is constituted a vacuum deposit of aluminum.

Le fonctionnement optique du module a déjà été précisé plus haut pour ce qui concerne le premier réflecteur elliptique 12 avec sa surface réfléchissante associée 22 en particulier en référence à la figure 4.The optical operation of the module has already been specified above for the first elliptical reflector 12 with its surface reflecting reflector 22, in particular with reference to FIG.

Pour résumer ici, en référence à la figure 1, lors du fonctionnement de la première source de lumière 14, la majeure partie des rayons primaires émis par la source 14, après s'être réfléchie sur la face interne 20 de la surface elliptique 18, est renvoyée vers le second foyer F2 du réflecteur 18, ou au voisinage de celui-ci. Les rayons lumineux secondaires sont réfléchis par la face interne 20 de la surface elliptique 18 vers la surface plane réfléchissante 22, de sorte qu'ils se réfléchissent une seconde fois vers l'avant, cette surface réfléchissante 22 opérant une fonction de « pliement ».To summarize here, with reference to FIG. operation of the first light source 14, the major part primary rays emitted by the source 14, after having reflected on the inner face 20 of the elliptical surface 18, is returned to the second F2 focus of the reflector 18, or in the vicinity thereof. The Rays secondary luminaries are reflected by the inner face 20 of the surface elliptical 18 towards the reflecting flat surface 22, so that they reflect a second time forward, this reflective surface 22 operating a function of "folding".

Une image I1 de la projection du faisceau de lumière émis par le module, en sortie de la lentille 16, est schématisée sur la figure 9. Cette première fonction du module correspond en particulier au mode « code » d'un projecteur de véhicule automobile.An image I1 of the projection of the beam of light emitted by the module, at the output of the lens 16, is shown schematically in FIG. first function of the module corresponds in particular to the "code" mode of a motor vehicle headlamp.

Lors de la commutation simultanée de la seconde source de lumière 14', la majeure partie des rayons primaires R1' émis par la source 14', après s'être réfléchie sur la face interne 20 de la surface elliptique 18, est renvoyée vers le second foyer F2 ou au voisinage de celui-ci. Ces rayons normaux à la surface inférieure 22A de la pièce transparente 22' traversent celle-ci sans perte optique, aux pertes près subies par réflexion vitreuse sur la surface 22A, et sont ensuite renvoyés par la lentille 16 au-dessus de l'axe A-A.When simultaneously switching the second source of light 14 ', most of the primary rays R1' emitted by the source 14 ', after being reflected on the inner face 20 of the surface elliptical 18, is returned to the second focus F2 or in the vicinity of this one. These normal rays at the bottom surface 22A of the room transparent 22 'pass through it without optical loss, losses near undergone by glassy reflection on the surface 22A, and are then returned by the lens 16 above the axis A-A.

Une image de la projection du faisceau de lumière émis par le module, en sortie de la lentille 16, est schématisée sur la figure 10. Une image I2 y vient s'adjoindre à l'image précédente I1. Cette seconde fonction du module correspond en particulier au mode « route » d'un projecteur de véhicule automobile.An image of the projection of the beam of light 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 headlight.

Compte-tenu de la transparence de la pièce 22' et de l'épaisseur réduite et non visible de son revêtement réflecteur 24, les deux images en question I1 et I2 sont à l'oeil jointives et forment un faisceau de lumière unique.Given the transparency of the piece 22 'and the thickness reduced and not visible its reflective coating 24, the two images in question I1 and I2 are eye-joined and form a bundle of single light.

Claims (13)

Module d'éclairage (10) pour un projecteur de véhicule automobile réalisant un faisceau d'éclairage du type à coupure, comportant, agencés d'arrière en avant globalement suivant un axe optique horizontal longitudinal (A-A), deux réflecteurs (12, 12') du type elliptique qui chacun délimite un volume de réflexion pour des rayons lumineux et qui chacun comporte une surface sensiblement elliptique de réflexion (20, 20'), deux sources lumineuses (14, 14') qui sont respectivement agencées au voisinage d'un premier foyer (F1, F1') de chaque réflecteur (12, 12'), et une lentille convergente (16) dont le plan focal est agencé au voisinage du second foyer (F2) du premier réflecteur (12), ce premier réflecteur comportant également une surface plane horizontale de réflexion (22), dont la face supérieure (24) est réfléchissante, qui délimite verticalement vers le bas le volume de réflexion du faisceau émis par la première source lumineuse et comportant un bord d'extrémité avant (28), dit bord de coupure, qui est agencé au voisinage du second foyer (F2) du réflecteur (12), cette surface plane (22) du premier réflecteur étant agencée dans un plan horizontal passant globalement par les foyers (F1, F2) du premier réflecteur (12), caractérisé en ce que la seconde source lumineuse est agencée de sorte à émettre un faisceau lumineux uniquement vers le second réflecteur (12'), au moins une des sources lumineuses (14, 14') étant constituée d'une diode électroluminescente.Lighting module (10) for a motor vehicle headlamp producing a cut-off type lighting beam comprising, arranged from rear to front generally along a longitudinal horizontal optical axis (AA), two reflectors (12, 12 ') ) of the elliptical type which each delimits a reflection volume for light rays and which each comprises a substantially elliptical reflection surface (20, 20 '), two light sources (14, 14') which are respectively arranged in the vicinity of a first focus (F1, F1 ') of each reflector (12, 12'), and a converging lens (16) whose focal plane is arranged in the vicinity of the second focus (F2) of the first reflector (12), the first reflector comprising also a horizontal plane reflective surface (22), whose upper surface (24) is reflective, which delimits vertically downward the reflection volume of the beam emitted by the first light source and having an end edge before (28), said cutting edge, which is arranged in the vicinity of the second focus (F2) of the reflector (12), this planar surface (22) of the first reflector being arranged in a horizontal plane passing generally through the foci (F1, F2) of the first reflector (12), characterized in that the second light source is arranged to emit a light beam only towards the second reflector (12 '), at least one of the light sources (14, 14') being constituted of a light-emitting diode. Module d'éclairage (10) selon la revendication 1, caractérisé en ce que les deux sources lumineuses sont séparées par un capotage (60) opaque.Lighting module (10) according to claim 1, characterized in that the two light sources are separated by an opaque cover (60). Module d'éclairage (10) selon l'une des revendications précédentes, caractérisé en ce que les seconds foyers (F2, F2') des premier et second réflecteurs elliptiques sont sensiblement confondus.Lighting module (10) according to one of the preceding claims, characterized in that the second foci (F2, F2 ') of the first and second elliptical reflectors are substantially merged. Module d'éclairage (10) selon l'une des revendications précédentes, caractérisé en ce que ladite surface plane horizontale de réflexion (22), dont la face supérieure (24) est réfléchissante, est constituée d'une pièce transparente (22') portant un revêtement réfléchissant.Lighting module (10) according to one of the preceding claims, characterized in that said flat horizontal reflection surface (22), whose upper face (24) is reflective, consists of a transparent piece (22 ') bearing a reflective coating. Module d'éclairage (10) selon la revendication 4, caractérisé en ce que ladite pièce transparente (22') comporte une face inférieure (22A) sphérique centrée sur le second foyer (F2') du second réflecteur elliptique (18').Lighting module (10) according to claim 4, characterized in that said transparent piece (22 ') comprises a spherical lower face (22A) centered on the second focus (F2') of the second elliptical reflector (18 '). Module d'éclairage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface sensiblement elliptique (18, 20) du premier réflecteur (12) est formée par un secteur angulaire de pièce sensiblement de révolution, autour de l'axe optique longitudinal (A-A), et en ce que ce secteur angulaire s'étend verticalement au-dessus de la surface plane (22) du réflecteur (12).Lighting module (10) according to any one of the preceding claims, characterized in that the substantially elliptical surface (18, 20) of the first reflector (12) is formed by an angular sector substantially of revolution, around the longitudinal optical axis (AA), and in that this angular sector extends vertically above the flat surface (22) of the reflector (12). Module d'éclairage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface sensiblement elliptique (18') du second réflecteur (12') est formée par un secteur angulaire de pièce sensiblement de révolution, autour d'un axe dit de révolution (A'- A').Lighting module (10) according to any one of the preceding claims, characterized in that the substantially elliptical surface (18 ') of the second reflector (12') is formed by an angular sector substantially of revolution, around an axis called revolution (A'-A '). Module d'éclairage (10) selon la revendication 7, caractérisé en ce que l'axe optique (A - A) et l'axe de révolution (A' - A') du second réflecteur (18') sont sécants.Lighting module (10) according to claim 7, characterized in that the optical axis (A - A) and the axis of revolution (A '- A') of the second reflector (18 ') are intersecting. Module d'éclairage (10) selon la revendication précédente, caractérisé en ce que la surface plane du réflecteur s'étend longitudinalement vers l'arrière, depuis son bord de coupure, au moins jusqu'au voisinage du premier foyer (F1) du réflecteur (12).Lighting module (10) according to the preceding claim, characterized in that the flat surface of the reflector extends longitudinally rearwardly from its cutting edge, at least to the vicinity of the first focus (F1) of the reflector (12). Module d'éclairage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la source lumineuse (14) associée au premier réflecteur (18) est agencée dans le module (10) de manière que son axe de diffusion lumineuse (B-B) soit sensiblement perpendiculaire à la surface plane (22) de ce réflecteur (12).Lighting module (10) according to any one of the preceding claims, characterized in that the light source (14) associated with the first reflector (18) is arranged in the module (10) so that its light scattering axis ( BB) is substantially perpendicular to the planar surface (22) of this reflector (12). Module d'éclairage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le bord de coupure (28) de la surface plane (22) du premier réflecteur (12) a un profil courbe, dans le plan horizontal, de manière à suivre globalement la courbure du plan focal de la lentille (16).Lighting module (10) according to any one of the preceding claims, characterized in that the cutting edge (28) of the flat surface (22) of the first reflector (12) has a curved profile, in the horizontal plane, in order to follow globally the curvature of the focal plane of the lens (16). Projecteur d'éclairage (46) de véhicule, caractérisé en ce qu'il comporte au moins un module d'éclairage (10) selon l'une quelconque des revendications précédentes destiné à une double fonction d'éclairage.Vehicle lighting headlamp (46), characterized in that it comprises at least one lighting module (10) according to any one of the preceding claims for a dual lighting function. Projecteur selon la revendication 12, caractérisé en ce que cette double fonction comprend la fonction d'éclairage en mode « code » et la fonction d'éclairage en mode « route ».Headlight according to Claim 12, characterized in that this dual function comprises the lighting function in "code" mode and the lighting function in "road" mode.
EP04291792A 2003-07-24 2004-07-13 Elliptical lighting module without screen emitting a low beam and headlamp comprising the same Active EP1500869B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04291792T PL1500869T3 (en) 2003-07-24 2004-07-13 Elliptical lighting module without screen emitting a low beam and headlamp comprising the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0309094 2003-07-24
FR0309094A FR2858042B1 (en) 2003-07-24 2003-07-24 LUMINAIRE-FREE ELLIPTICAL LIGHTING MODULE COMPRISING A CUT-OFF LIGHTING BEAM AND PROJECTOR COMPRISING SUCH A MODULE

Publications (2)

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

Family

ID=33484702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04291792A Active EP1500869B1 (en) 2003-07-24 2004-07-13 Elliptical lighting module without screen emitting a low beam and headlamp comprising the same

Country Status (7)

Country Link
EP (1) EP1500869B1 (en)
JP (1) JP4460966B2 (en)
AT (1) ATE337518T1 (en)
DE (1) DE602004002043T2 (en)
ES (1) ES2271804T3 (en)
FR (1) FR2858042B1 (en)
PL (1) PL1500869T3 (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762776A1 (en) * 2005-09-09 2007-03-14 Valeo Vision Method for the manufacturing of a module or a vehicle headlamp
EP1881264A1 (en) * 2006-07-21 2008-01-23 Valeo Vision Optical module for headlights of an automobile
EP1970619A1 (en) * 2007-03-14 2008-09-17 Valeo Vision Optical module for headlights of an automobile
FR2941785A1 (en) * 2009-02-05 2010-08-06 Valeo Vision Sas OPTICAL DEVICE, IN PARTICULAR FOR A MOTOR VEHICLE, SUCH AS A LIGHTING OR SIGNALING DEVICE
FR2944578A1 (en) * 2009-04-21 2010-10-22 Valeo Vision Sas MODULE AND LIGHTING DEVICE FOR VEHICLE WITH ENHANCED ROAD FUNCTION
EP2390561A1 (en) * 2010-05-28 2011-11-30 Hella KGaA Hueck & Co. LED projection module for a vehicle headlight
WO2012034936A1 (en) * 2010-09-18 2012-03-22 Automotive Lighting Reutlingen Gmbh Motor vehicle headlight comprising a multifunctional projection module
WO2012038173A1 (en) * 2010-09-21 2012-03-29 Osram Ag Light-emitting device
FR2995662A1 (en) * 2012-06-29 2014-03-21 Valeo Vision Lighting module for projector of car, has secondary light source associated with main lens to generate beam with function codes when main source is activated and secondary source is deactivated, and beam with function of diurnal lighting
EP2711611A1 (en) * 2012-09-24 2014-03-26 Valeo Vision Lighting module, in particular for a motor vehicle
CN104421795A (en) * 2013-08-29 2015-03-18 现代摩比斯株式会社 Lamp for vehicle
EP1708513B1 (en) * 2005-03-30 2015-04-29 Samsung Electronics Co., Ltd. Illumination unit and image projection apparatus employing the same
DE102013225950A1 (en) * 2013-12-13 2015-06-18 Automotive Lighting Reutlingen Gmbh Automotive lighting device
CZ305372B6 (en) * 2013-11-22 2015-08-19 Varroc Lighting Systems, s.r.o. Motor vehicle headlight
CN105371204A (en) * 2014-08-11 2016-03-02 株式会社小糸制作所 Vehicle lamp
CN105805669A (en) * 2016-03-30 2016-07-27 奇瑞汽车股份有限公司 LED dipped headlight light distribution device
EP3115683A1 (en) * 2015-07-10 2017-01-11 Valeo Vision Lighting module for lighting and/or signalling of a motor vehicle
CN107289395A (en) * 2016-04-11 2017-10-24 法雷奥照明公司 For the headlamp module for the motor vehicles for launching light beam
EP2284435B1 (en) * 2009-08-10 2018-03-07 Koito Manufacturing Co., Ltd. Lamp unit for vehicular headlamp
CN109724047A (en) * 2019-02-22 2019-05-07 成都瀚德胜邦光学有限公司 A kind of dipped beam mould group and car headlamp for car headlamp
EP3708904A1 (en) * 2019-03-14 2020-09-16 Valeo Vision Lighting device illustrating the lit surfaces of at least two manifolds

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4615417B2 (en) 2005-10-13 2011-01-19 株式会社小糸製作所 Vehicle headlamp lamp unit
JP4695112B2 (en) 2007-03-26 2011-06-08 株式会社小糸製作所 Vehicle headlamp lamp unit
JP2009283408A (en) 2008-05-26 2009-12-03 Koito Mfg Co Ltd Vehicular headlight
DE102008049168A1 (en) * 2008-09-26 2010-04-01 Hella Kgaa Hueck & Co. Projection body for headlight of motor vehicle, has primary part formed as three-axis ellipsoid body, where projection body is geometrically designed so that light exhibits collimation in collimation plane and scattering in scattering plane
DE102009008631B4 (en) * 2009-02-12 2016-11-03 Automotive Lighting Reutlingen Gmbh Projection module for a motor vehicle headlight
FR2962786B1 (en) * 2010-07-19 2014-11-21 Valeo Vision LIGHTING MODULE WITH INCLINE AND REVERSE ELLIPTICAL REFLECTOR
FR2962784B1 (en) * 2010-07-19 2015-01-16 Valeo Vision REFLECTOR OF THE ELLIPTICAL TYPE CORRECTED
DE102011118277B4 (en) * 2010-12-03 2022-03-24 Docter Optics Se Headlight lens for a vehicle headlight
DE102011118270A1 (en) 2010-12-03 2012-06-06 Docter Optics Gmbh vehicle headlights
DE102012219315B4 (en) 2012-10-23 2022-09-08 Bayerische Motoren Werke Aktiengesellschaft Headlight for a vehicle with a first light source and a second light source
AT514161B1 (en) 2013-04-09 2016-05-15 Zizala Lichtsysteme Gmbh Light unit with aperture with at least one light window
JP6271183B2 (en) 2013-08-12 2018-01-31 株式会社小糸製作所 Vehicle lighting
DE102015113141A1 (en) 2014-12-15 2016-06-16 Mauser-Werke Oberndorf Maschinenbau Gmbh Method for machining a workpiece surface and workpiece
EP3559543B1 (en) * 2016-12-21 2020-09-23 Lumileds Holding B.V. Projector-type vehicle headlamp
JP6968686B2 (en) * 2017-12-22 2021-11-17 スタンレー電気株式会社 Vehicle lighting
EP3643962A1 (en) 2018-10-25 2020-04-29 ZKW Group GmbH Light unit for a motor vehicle headlamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4851968A (en) * 1987-09-29 1989-07-25 Koito Seisakusho Co., Ltd. Automotive projector type headlight
US4914747A (en) 1988-06-28 1990-04-03 Koito Seisakusho Co, Ltd. Vehicular headlamp
DE19718542A1 (en) * 1997-05-02 1998-11-05 Hella Kg Hueck & Co Headlamp fitted to road vehicle
EP1267116A1 (en) * 2001-06-14 2002-12-18 Valeo Vision Lighting or signalling device
WO2003003410A1 (en) * 2001-06-29 2003-01-09 Koninklijke Philips Electronics N.V. Multiple-filament motor vehicle headlight lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4851968A (en) * 1987-09-29 1989-07-25 Koito Seisakusho Co., Ltd. Automotive projector type headlight
US4914747A (en) 1988-06-28 1990-04-03 Koito Seisakusho Co, Ltd. Vehicular headlamp
DE19718542A1 (en) * 1997-05-02 1998-11-05 Hella Kg Hueck & Co Headlamp fitted to road vehicle
EP1267116A1 (en) * 2001-06-14 2002-12-18 Valeo Vision Lighting or signalling device
WO2003003410A1 (en) * 2001-06-29 2003-01-09 Koninklijke Philips Electronics N.V. Multiple-filament motor vehicle headlight lamp

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1708513B1 (en) * 2005-03-30 2015-04-29 Samsung Electronics Co., Ltd. Illumination unit and image projection apparatus employing the same
EP1762776A1 (en) * 2005-09-09 2007-03-14 Valeo Vision Method for the manufacturing of a module or a vehicle headlamp
EP1881264A1 (en) * 2006-07-21 2008-01-23 Valeo Vision Optical module for headlights of an automobile
FR2913750A1 (en) * 2007-03-14 2008-09-19 Valeo Vision Sa OPTICAL MODULE FOR MOTOR VEHICLE PROJECTOR
EP1970619A1 (en) * 2007-03-14 2008-09-17 Valeo Vision Optical module for headlights of an automobile
FR2941785A1 (en) * 2009-02-05 2010-08-06 Valeo Vision Sas OPTICAL DEVICE, IN PARTICULAR FOR A MOTOR VEHICLE, SUCH AS A LIGHTING OR SIGNALING DEVICE
EP2216589A1 (en) * 2009-02-05 2010-08-11 Valeo Vision Optical device for lighting or signalisation, namely for automobile vehicle
US8939625B2 (en) 2009-02-05 2015-01-27 Valeo Vision Optical device, in particular for an automotive vehicle, such as a lighting or signalling device
US8579483B2 (en) 2009-02-05 2013-11-12 Valeo Vision Optical device, in particular for an automotive vehicle, such as a lighting or signaling device
FR2944578A1 (en) * 2009-04-21 2010-10-22 Valeo Vision Sas MODULE AND LIGHTING DEVICE FOR VEHICLE WITH ENHANCED ROAD FUNCTION
WO2010121948A1 (en) * 2009-04-21 2010-10-28 Valeo Vision Lighting module and device for a vehicle with improved road function
CN102460002A (en) * 2009-04-21 2012-05-16 法雷奥照明公司 Lighting module and device for a vehicle with improved road function
US8545073B2 (en) 2009-04-21 2013-10-01 Valeo Vision Lighting module and device for vehicle with improved high-beam function
EP2284435B1 (en) * 2009-08-10 2018-03-07 Koito Manufacturing Co., Ltd. Lamp unit for vehicular headlamp
EP2390561A1 (en) * 2010-05-28 2011-11-30 Hella KGaA Hueck & Co. LED projection module for a vehicle headlight
WO2012034936A1 (en) * 2010-09-18 2012-03-22 Automotive Lighting Reutlingen Gmbh Motor vehicle headlight comprising a multifunctional projection module
US9157595B2 (en) 2010-09-21 2015-10-13 Osram Gmbh Light-emitting device having multiple light source groups
CN102933895A (en) * 2010-09-21 2013-02-13 欧司朗有限公司 Light-emitting device
WO2012038173A1 (en) * 2010-09-21 2012-03-29 Osram Ag Light-emitting device
FR2995662A1 (en) * 2012-06-29 2014-03-21 Valeo Vision Lighting module for projector of car, has secondary light source associated with main lens to generate beam with function codes when main source is activated and secondary source is deactivated, and beam with function of diurnal lighting
FR2995967A1 (en) * 2012-09-24 2014-03-28 Valeo Vision LIGHTING MODULE, IN PARTICULAR FOR A MOTOR VEHICLE
EP2711611A1 (en) * 2012-09-24 2014-03-26 Valeo Vision Lighting module, in particular for a motor vehicle
CN104421795A (en) * 2013-08-29 2015-03-18 现代摩比斯株式会社 Lamp for vehicle
CZ305372B6 (en) * 2013-11-22 2015-08-19 Varroc Lighting Systems, s.r.o. Motor vehicle headlight
US9366405B2 (en) 2013-11-22 2016-06-14 Varroc Lighting Systems, s.r.o. Headlamp system for motor vehicles
DE102013225950A1 (en) * 2013-12-13 2015-06-18 Automotive Lighting Reutlingen Gmbh Automotive lighting device
DE102013225950B4 (en) * 2013-12-13 2017-06-01 Automotive Lighting Reutlingen Gmbh Automotive lighting device
CN105371204A (en) * 2014-08-11 2016-03-02 株式会社小糸制作所 Vehicle lamp
US9714747B2 (en) 2014-08-11 2017-07-25 Koito Manufacturing Co., Ltd. Vehicle lamp
EP3115683A1 (en) * 2015-07-10 2017-01-11 Valeo Vision Lighting module for lighting and/or signalling of a motor vehicle
FR3038696A1 (en) * 2015-07-10 2017-01-13 Valeo Vision LUMINOUS MODULE FOR LIGHTING AND / OR SIGNALING OF A MOTOR VEHICLE
CN105805669A (en) * 2016-03-30 2016-07-27 奇瑞汽车股份有限公司 LED dipped headlight light distribution device
CN107289395A (en) * 2016-04-11 2017-10-24 法雷奥照明公司 For the headlamp module for the motor vehicles for launching light beam
CN109724047A (en) * 2019-02-22 2019-05-07 成都瀚德胜邦光学有限公司 A kind of dipped beam mould group and car headlamp for car headlamp
CN109724047B (en) * 2019-02-22 2024-04-16 成都瀚德胜邦光学有限公司 Dipped beam module for automobile headlamp and automobile headlamp
EP3708904A1 (en) * 2019-03-14 2020-09-16 Valeo Vision Lighting device illustrating the lit surfaces of at least two manifolds
FR3093789A1 (en) * 2019-03-14 2020-09-18 Valeo Vision LUMINOUS DEVICE IMAGING THE LIT SURFACES OF AT LEAST TWO MANIFOLDS
US11022266B2 (en) 2019-03-14 2021-06-01 Valeo Vision Luminous device imaging the lit surfaces of at least two collectors
EP4235024A3 (en) * 2019-03-14 2023-09-13 Valeo Vision Lighting device illustrating the lit surfaces of at least two manifolds

Also Published As

Publication number Publication date
FR2858042B1 (en) 2005-09-23
DE602004002043D1 (en) 2006-10-05
FR2858042A1 (en) 2005-01-28
JP2005044809A (en) 2005-02-17
EP1500869B1 (en) 2006-08-23
PL1500869T3 (en) 2006-12-29
JP4460966B2 (en) 2010-05-12
ATE337518T1 (en) 2006-09-15
ES2271804T3 (en) 2007-04-16
DE602004002043T2 (en) 2007-04-12

Similar Documents

Publication Publication Date Title
EP1500869B1 (en) Elliptical lighting module without screen emitting a low beam and headlamp comprising the same
EP1357334B1 (en) Elliptical lighting module without screen providing a cut-off beam and headlamp comprising the same
EP3232118B1 (en) Headlight module for motor vehicle
FR3065784B1 (en) LUMINOUS MODULE WITH OPTICAL IMAGING OPTICS FOR A PIXELLIZED SPATIAL MODULATOR FOR A MOTOR VEHICLE
EP1746339B1 (en) Device for lighting or signalising, in particular for vehicles
EP2871406B1 (en) Primary optical element, lighting module and headlight for motor vehicle
EP2422130B1 (en) Headlamp module for vehicle, having an improved high beam function
EP3708904B1 (en) Lighting device illustrating the lit surfaces of at least two manifolds
EP3147557A1 (en) Primary optical element for lighting module of a vehicle
EP3246620B1 (en) Led headlight with dioptre creating a cut-out for vehicles
EP3002504A2 (en) Lighting module for lighting and/or signalling of a motor vehicle
FR2920517A1 (en) PROJECTION MODULE OF A VEHICLE HEADLIGHT
EP3093557B1 (en) Low & high beam bi-functional lighting module for motor vehicle
EP2743567A1 (en) Primary optical element, lighting module and headlight for motor vehicle
EP1610057A1 (en) Lighting module for a vehicle headlight and headlight incorporating such a module
EP3167226A1 (en) Lighting module for a motor vehicle
EP1528312A1 (en) Lighting module for vehicle headlamp
EP3708905B1 (en) Lighting device imaging the mirrored image of a light collector
EP2019256A1 (en) Lighting module for vehicle headlight
FR2772111A1 (en) PROJECTOR WITH HYPERBOLIC REFLECTOR AND OPTICAL BLOCK COMPRISING SUCH A PROJECTOR
EP2767752A1 (en) Lighting and/or signalling device with toric lens
EP2019258A1 (en) Optical module with light source for automobile headlight.
EP0838628B1 (en) Motor vehicle headlamp comprising a light conducting element
FR3038695A1 (en) LUMINOUS MODULE FOR LIGHTING AND / OR SIGNALING OF A MOTOR VEHICLE
EP2472176B1 (en) Lighting and/or signalling device, in particular of an automobile

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20050616

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060823

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060823

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060823

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060823

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060823

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060823

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060823

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REF Corresponds to:

Ref document number: 602004002043

Country of ref document: DE

Date of ref document: 20061005

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20061101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061123

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061123

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070125

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2271804

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070524

BERE Be: lapsed

Owner name: VALEO VISION

Effective date: 20070731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070731

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060823

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070731

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20081001

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20080713

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080731

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080713

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060823

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070713

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060823

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070224

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 602004002043

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: F21S0008100000

Ipc: F21S0043000000

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SK

Payment date: 20180618

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PL

Payment date: 20180619

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CZ

Payment date: 20190620

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20190809

Year of fee payment: 16

Ref country code: IT

Payment date: 20190718

Year of fee payment: 16

REG Reference to a national code

Ref country code: SK

Ref legal event code: MM4A

Ref document number: E 1328

Country of ref document: SK

Effective date: 20190713

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190713

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200713

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190713

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20211228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200714

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200713

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230528

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230727

Year of fee payment: 20

Ref country code: DE

Payment date: 20230712

Year of fee payment: 20