EP1500869A1 - Module d'éclairage elliptique sans cache réalisant un faisceau d'éclairage à coupure et projecteur comportant un tel module - Google Patents
Module d'éclairage elliptique sans cache réalisant un faisceau d'éclairage à coupure et projecteur comportant un tel module Download PDFInfo
- 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
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- 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.)
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/65—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—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
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- 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.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
- 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.
- 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.
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.
- Module d'éclairage (10) selon la revendication 1, caractérisé en ce que les deux sources lumineuses sont séparées par un capotage (60) opaque.
- 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.
- 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.
- 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').
- 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).
- 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').
- 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.
- 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).
- 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).
- 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).
- 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.
- 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 ».
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL04291792T PL1500869T3 (pl) | 2003-07-24 | 2004-07-13 | Moduł oświetlający eliptyczny bez zasłony wytwarzający strumień oświetlający z odcięciem i reflektor zawierający taki moduł |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0309094 | 2003-07-24 | ||
FR0309094A FR2858042B1 (fr) | 2003-07-24 | 2003-07-24 | Module d'eclairage elliptique sans cache realisant un faisceau d'eclairage a coupure et projecteur comportant un tel module |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1500869A1 true EP1500869A1 (fr) | 2005-01-26 |
EP1500869B1 EP1500869B1 (fr) | 2006-08-23 |
Family
ID=33484702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04291792A Expired - Lifetime EP1500869B1 (fr) | 2003-07-24 | 2004-07-13 | Module d'éclairage elliptique sans cache réalisant un faisceau d'éclairage à coupure et projecteur comportant un tel module |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1500869B1 (fr) |
JP (1) | JP4460966B2 (fr) |
AT (1) | ATE337518T1 (fr) |
DE (1) | DE602004002043T2 (fr) |
ES (1) | ES2271804T3 (fr) |
FR (1) | FR2858042B1 (fr) |
PL (1) | PL1500869T3 (fr) |
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DE102015113141A1 (de) | 2014-12-15 | 2016-06-16 | Mauser-Werke Oberndorf Maschinenbau Gmbh | Verfahren zur Bearbeitung einer Werkstückoberfläche und Werkstück |
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JP6968686B2 (ja) * | 2017-12-22 | 2021-11-17 | スタンレー電気株式会社 | 車両用灯具 |
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EP1881264A1 (fr) * | 2006-07-21 | 2008-01-23 | Valeo Vision | Module optique pour projecteur de véhicule automobile |
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FR2941785A1 (fr) * | 2009-02-05 | 2010-08-06 | Valeo Vision Sas | Dispositif optique, notamment pour vehicule automobile, tel qu'un dispositif d'eclairage ou de signalisation |
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CN109724047A (zh) * | 2019-02-22 | 2019-05-07 | 成都瀚德胜邦光学有限公司 | 一种用于汽车前照灯的近光模组及汽车前照灯 |
CN109724047B (zh) * | 2019-02-22 | 2024-04-16 | 成都瀚德胜邦光学有限公司 | 一种用于汽车前照灯的近光模组及汽车前照灯 |
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FR3093789A1 (fr) * | 2019-03-14 | 2020-09-18 | Valeo Vision | Dispositif lumineux imageant les surfaces eclairees d’au moins deux collecteurs |
US11022266B2 (en) | 2019-03-14 | 2021-06-01 | Valeo Vision | Luminous device imaging the lit surfaces of at least two collectors |
EP4235024A3 (fr) * | 2019-03-14 | 2023-09-13 | Valeo Vision | Dispositif lumineux imageant les surfaces eclairees d'au moins deux collecteurs |
CN114729736A (zh) * | 2019-11-29 | 2022-07-08 | 法雷奥照明公司 | 在具有明暗截止线的光模块反射器的区之间的连接 |
Also Published As
Publication number | Publication date |
---|---|
FR2858042B1 (fr) | 2005-09-23 |
DE602004002043D1 (de) | 2006-10-05 |
DE602004002043T2 (de) | 2007-04-12 |
EP1500869B1 (fr) | 2006-08-23 |
PL1500869T3 (pl) | 2006-12-29 |
ATE337518T1 (de) | 2006-09-15 |
ES2271804T3 (es) | 2007-04-16 |
JP2005044809A (ja) | 2005-02-17 |
FR2858042A1 (fr) | 2005-01-28 |
JP4460966B2 (ja) | 2010-05-12 |
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