EP1528312A1 - Module d'éclairage pour projecteur de véhicule - Google Patents
Module d'éclairage pour projecteur de véhicule Download PDFInfo
- Publication number
- EP1528312A1 EP1528312A1 EP04292527A EP04292527A EP1528312A1 EP 1528312 A1 EP1528312 A1 EP 1528312A1 EP 04292527 A EP04292527 A EP 04292527A EP 04292527 A EP04292527 A EP 04292527A EP 1528312 A1 EP1528312 A1 EP 1528312A1
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- EP
- European Patent Office
- Prior art keywords
- reflector
- module
- lighting
- focus
- cut
- 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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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
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
- F21S43/31—Optical layout thereof
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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
- F21S41/10—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]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
- F21S41/145—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device the main emission direction of the LED being opposite to the main emission direction of the illuminating device
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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
- F21S41/10—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]
- F21S41/155—Surface emitters, e.g. organic light emitting diodes [OLED]
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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
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
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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
- F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
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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
- F21S41/36—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
- 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
-
- 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
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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
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
- F21S43/14—Light emitting diodes [LED]
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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 for vehicle headlamp producing a cut-off type lighting beam particularly suitable for use with diodes emitting.
- a beam of cut-off lighting means a beam lighting that has a directional limit or cutoff, above which the emitted light intensity is low.
- the low beam and fog lamp functions 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 lens convergent, and which is arranged in the vicinity of the second focus of the reflector.
- the cache allows to hide the light rays from the source bright 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 a cache, issued by the projector above the cut.
- a disadvantage of this type of projector is that a part significant light flux emitted by the source dissipates in the face back of the cache.
- Another solution is to make a lighting module using a light source and a Fresnel optic or a reflector type complex surface. To create a break, it is necessary to align the edges of the light source images on the measurement screen used to validate the regulation lighting beam.
- the image of the virtual source corresponding to the diode is usually round is diffuse and it is much more complicated to make a clean cut by aligning the corresponding images of round shapes.
- This difficulty can be overcome by using a diaphragm with the diode, but then we lose a significant amount of light energy produced by the diode.
- the emission indicators of the most known diodes performance are complex and achieving a homogeneous beam is very difficult to obtain from the direct images of the diode.
- the present invention aims to provide a lighting module for vehicle headlamp producing a cut-off type lighting beam to achieve a clean cut, including using a diode as a light source, as well as a homogeneous lighting beam while offering less loss of luminous flux by avoiding the use of a cache.
- the majority of the luminous flux emitted by the source is used in the light beam produced by the module.
- the lighting module according to the invention makes it possible to a clean cut, especially with a diode because it projects to the front the image of the cutoff edge.
- the shape of the cut in the beam lighting is therefore determined by the profile of the cutting edge.
- Another advantage of the module according to the invention is that it operates a property of elliptical lighting modules which is to "mix" the images of the light source at the second focus of the first reflector, which improves the homogeneity of the lighting beam produced.
- such a module has optical performance improved compared to a system using a lens; there is indeed less losses due to non-unit reflection coefficient of surfaces reflective of the second and third reflectors that by reflections glassy in the lens.
- the first reflector and its light source may be concealed behind one of the said second or third reflector so the user looking at the output beam do not see the first reflector.
- Such a solution allows, for example, get rid of the use of a mask to hide the first reflector and its light source.
- optical axes of said second and third reflectors are merged.
- said first reflector is arranged at the back of said second reflector so that said first reflector is concealed by said second reflector
- said second reflector and said third reflector have a focus arranged in the vicinity of said second focus of said first reflector.
- said second reflector and / or said third reflector comprise a reflection surface of luminous rays whose cut in a plane is a parabola.
- said second reflector and / or said third reflector are a surface-type reflector reflection complex of light rays.
- said light source is a light emitting diode.
- said cutting edge is a beveled edge defining an oblique surface, said oblique surface being determined so that said cutoff edge does not intercept the rays reflected by said first reflector and passing beyond said second focus.
- said second focus of said first reflector is located at the center of the portion of line intersecting between said surface oblique and said reflective upper face of said folder.
- said first and third reflectors are made of a single piece and / or said second and fourth reflectors are made in one piece.
- said second, third and fourth reflectors are made in one piece.
- the lighting module has a fifth reflector receiving direct light rays from said first light source, the reflecting surface of said fifth reflector being such that it produces a third part of the breaking beam.
- said first, third and fifth reflectors are made in one piece.
- said first and Fifth reflectors are made in one piece.
- the reflective surface of said unbroken reflector can be a substantially paraboloidal surface to which a reduction factor is applied in one direction perpendicular to the optical axis of said first reflector and to the optical axis said sixth reflector.
- said unbroken reflector can be a type reflector with a complex reflection surface luminous.
- said edge cutoff is a beveled edge defining an oblique surface, said oblique surface being determined so that said cutting edge does not intercept the rays reflected by said first reflector and passing beyond said second focus, said oblique surface being reflective and receiving a portion of the light rays from said fifth reflector and said module comprises a sixth reflector receiving the light rays from said oblique surface, said sixth reflector having a surface substantially paraboloidal reflection of light rays with a focus arranged in the vicinity of said second focus of said first reflector.
- said module has a seventh reflector receiving directly the light rays from said second light source and having a surface substantially paraboloidal reflection of light rays.
- said folder comprises a corrective surface of the field curvature located along said edge of cut and in the continuity of said upper face of said folder of so that no ray from said first reflector and returned to said third reflector does not exceed said cut.
- Said corrective surface may be a surface that absorbs the light or reflecting surface and inclined at an angle determined by relative to the plane of said reflective upper face of said bender of so that the rays coming from said first reflector and which would have been returned above the cut in the absence of said corrective surface are entirely reflected in a direction opposite to the direction of the said first cut-off lighting beam.
- the first reflector consists of an ellipso-parabolic surface.
- the second reflector and / or the third reflector is a parabolic cylinder.
- the first collector reflector consists of an ellipso-parabolic surface, and / or that the third exit reflector is a parabolic cylinder.
- FIG. 1 schematically represents a side view of a lighting module 1 for a vehicle headlamp according to a first mode of embodiment of the invention.
- the substantially elliptical reflective surface 7 is made under the shape of a substantially angular sector of revolution and that extends into the half-space above a perpendicular axial plane at the plane of the sheet and containing the optical axis A2. First approximation, the surface 7 is a half-ellipsoid.
- surface 7 may not be perfectly elliptical and have several specific profiles planned for optimize the light distribution in the lighting beam produced by the module 1. This implies that the first reflector 2 is not perfectly of revolution.
- the light source 6 is arranged substantially at the first F1 focus of the first reflector 2.
- the light source 6 is a diode electroluminescent light which emits the majority of its light energy towards the reflective inner surface of the substantially elliptical surface 7.
- This diode 6 is for example a diode made of nitride gallium GaN with a phosphor for emitting white light.
- the optical axis A1 is substantially parallel to the longitudinal axis of a vehicle not shown and equipped with the lighting module 1 and forms an angle equal to 90 ° with the optical axis A2.
- the reflecting surface 8 is of substantially paraboloidal shape, the axis of the parabola being the optical axis A1.
- Y be the same direction and in the same direction as the optical axis A2, a direction Z identical and opposite direction to the optical axis A1 and a direction X so that the XYZ center mark F2 forms a direct reference.
- the third reflector 4 is then substantially the symmetrical of the second reflector 3 with respect to the plane (F2, X, Z). Note, however, that the symmetrical character of the second and third reflectors 3 and 4 is optional.
- the fourth reflector 5 also called a folder, lies between the second reflector 3 and the third reflector 4 and comprises at least one reflective upper face and a front end edge 11, said edge of cut.
- the cutting edge 11 is arranged in the vicinity of the second focus F2 of the first reflector 2.
- module 1 The operating principle of module 1 is as follows:
- the light source 6 is arranged at the first focus F1 of the first reflector 2, most of the rays emitted by the source 6, after reflected on the inner face 7, is returned to the second focus F2 or in the vicinity of it. This is the case of the radius R1 which passes along the edge 11. R1 is then reflected on the surface 9 of the third reflector 4 in a direction substantially parallel to the optical axis A1 of the third reflector 4.
- the cutting edge 11 has a bevel 12 defining an oblique surface. This oblique surface 12 is determined from so that the cutting edge 11 is not likely to intercept rays reflected by the first reflector 2 and passing beyond the second focus F2.
- the reflective surface 10 makes it possible to "fold" the images of the light source 6 which are reflected by the elliptical surface 7 of the first reflector 2 at the second focus F2.
- the "fold” formed by this "folding" of images helps to form a clear cut in the lighting beam reflected by the second and third reflectors 3 and 4.
- the first reflector 2 is located behind the second reflector 3 of so that, when looking at the face module (facing the optical axis A1), we does not see the first reflector 2 and the light source 6; these are hidden by the second reflector and it is unnecessary to provide hiding place.
- the second and third reflectors are perfectly symmetrical, so with the same optical axis A1; they may not be symmetrical and have optical axes different, the only condition being that their optical axes intersect at second focus F2 of the first reflector and belong to the same plane (F2, X, Z).
- FIG. 2 schematically represents a side view of a 100 lighting module for vehicle headlamp according to a second mode embodiment of the invention.
- This module 100 is identical to module 1 of FIG. difference that it further comprises a fifth reflector 14.
- This fifth reflector has a reflecting surface 15 which receives light rays directly from the light source 6 and produces a beam of light rays below the horizontal cut. If the light source 6 was punctual and without any optical device surrounding it, the reflective surface 15 would be a paraboloidal surface with a focus located at the second focus F2 of the first reflector.
- the light source 6 such as a diode electroluminescent is not a point source and has a chip not shown as a square or rectangular surface surrounded by a half-lens spherical plastic not shown and centered on the center of the chip. Therefore, the non-punctualities of the source and the lens must be taken into consideration for the construction of the reflecting surface 15.
- a complex surface can be used to achieve the reflective surface.
- one solution is to build the reflective surface from a source considered as point and from point 17 of the square of the chip closest to the fifth reflector 14.
- the reflective surface 15 is then constructed so that the radius R5 from point 17 is parallel to the optical axis A1. Construction can be do this by considering the spherical wave surface from point 17 which is then transformed into a non-spherical wave surface via its passage by the half-plastic lens. This non-spherical wave surface can to be determined by the laws of Descartes.
- This fifth reflector 14 makes it possible to increase significantly the intensity of the cut-off beam by recovering the light that would be, in the absence of this fifth reflector 14, lost towards the rear of the module 100.
- first, third and fifth reflectors respectively 2, 4 and 14 can be made in one piece with a simple mold without drawer in a standard plastic material of the PPS type (Phenylene polysulfide). It is the same for the second reflector 3 5. In both cases, the reflective coating does not have to be only on one side since there are optical surfaces reflective than on one side.
- the fifth reflector can occupy a reduced space under the first reflector 2 and leave a free zone 16 between said first and fifth reflectors into which can be inserted an optical device for performing an additional function such as the realization of an unbroken beam such as daytime running lights or traffic lights DRL daytime running light (English).
- FIG. 3 schematically represents a side view of a lighting module 101 for a vehicle headlamp according to a third mode embodiment of the invention.
- This reflector 18 without cutoff has a reflective surface interior 19 substantially paraboloidal with an optical axis confused with the optical axis A1 of the second and third reflectors 3 and 4 and a focus F3.
- This focus F3 is positioned positively along the axis F2-Z and the Light source 20 is arranged in the vicinity of said focus F3.
- the reflective surface 19 of the unbroken reflector 18 was a real parable, it would produce a seamless output beam substantially circular. But regulators impose the uninterrupted functions of the road or DRL type to have a beam that is about twice as wide as it is high, i.e. the beam should spread twice more next X than following Y.
- Another solution consists in producing a complex surface for the reflective surface 19 by adding streaks on the surface as described in the documents FR2760068 and FR2760067.
- FIG. 4 schematically represents a side view of a 102 lighting module for a vehicle headlamp according to a fourth mode embodiment of the invention.
- the fifth reflector 21 is substantially the symmetrical of the first reflector 2 with respect to the plane (F2, X, Z). From then on, the first focus F4 of this fifth reflector 21 is the symmetrical focus F1 of the first reflector 2 relative to the second focus F2 of the first reflector 2 and the second focus of the fifth reflector is merged with the second reflector F2 of the first reflector 2.
- the second light source is substantially arranged at the neighborhood of the first focus F4 of the fifth reflector
- the reflective surface 22 of the fifth reflector 21 is therefore substantially elliptical with an optical axis A3 directed in the opposite direction to the optical axis A2.
- the bevel 12 of the folder is made reflective so that it can reflect some of the reflected rays on the reflective surface 22 of the fifth reflector 21.
- the sixth reflector 23 receives the light rays coming from the bevel 12 reflective, said sixth reflector 23 having a surface substantially paraboloidal reflection of light rays with a fireplace arranged at near the second focus F2 of the first reflector 2.
- the seventh reflector 25 has a reflective surface 26 substantially paraboloidal that produces a beam of light rays above and below the horizontal cut.
- Reflective surface 26 has a focus located at the second focus F2 of the first reflector and is arranged in order to directly receive light from the second source 27 and which is not reflected on the surface 22 of the fifth reflector 21.
- module 102 The operating principle of module 102 is as follows:
- the second light source 27 is arranged at the first F4 focus of the fifth reflector 21, most of the rays emitted by the source 27, after being reflected on the inner face 22, is returned to the second focus F2 or in the vicinity thereof. This is the case of the R7 ray which passes along the cutoff edge 11. R7 is then reflected on the surface 8 of the second reflector 3 in a direction substantially parallel to the axis A1 optical reflector of the second reflector 3.
- the R10 type rays that are not intercepted by the surface 22 of the fifth reflector are emitted towards the surface 26 of the seventh reflector 25 and then transmitted in a beam above and below the cut.
- the ray R10 represented as reflecting in the center of the surface 26 is exactly on the cut. However, it is possible to construct the surface 26 so that it produces a beam at cut. This construction would be done for example in the same way as the construction of the reflector 14 of Figure 2 by inverting the beams.
- both light sources 6 and 27 are lit at the same time we obtain an output beam of the high beam type or DRL; when the first source 6 is only lit, we always have a cut-beam of the dipped beam or fog lamp type.
- the module 102 thus makes it possible to create a complementary beam by adding light above the cutoff line of the main beam.
- FIG. 5 represents a curve 200 of an isophot of the module illumination 102 as shown in Figure 1 with a cut edge right along the X axis.
- the curve 200 shows that a part comprising two fins 201 and 202 of the lighting beam is above the directional limit or cutoff separating the illuminated surface into two zones I (unbroken) and II (above the cut).
- fins 201 and 202 in zone II are due to the absence of field curvature correction, especially after reflection on the third reflector 4.
- all the rays arriving on the reflecting surface 9 and passing along the cutting edge 11 should start again horizontally.
- the image projected by the paraboloid 9 is never equally sharp for points on either side of F2 focus according to direction X and slightly offset on the Z axis. The image of these points is found over the cut and explains the presence of the fins 201 and 202.
- FIG. 6 represents a reflective corrective surface 400 of field curvature used in a module as shown in Figure 1.
- FIG. 7 represents an isophote curve 300 of a module of illumination as shown in FIG. 4 with a corrected cut edge with the surface 400 in the plane P as shown in FIG.
- Curve 300 shows that the entire lighting beam is below directional limit or cut, i.e. in zone I.
- the invention therefore consists in using a straight cutting edge 11, and to form the image at infinity using the second and third reflectors 3 and 4, these being constituted by parabolic cylinders, that is to say surfaces such as 8 or 9 in Figure 1, generated by a line segment perpendicular to the plane of this figure and resting on parable 8 or 9.
- the first reflector 2 must therefore be a transforming surface the spherical wave emitted by the light source 6 into a cylindrical wave, whose generator is parallel to the cutting edge 11.
- a lighting module including the first reflector 2 consists of an ellipso-parabolic surface, of which the second and third reflectors 3 and 4 are parabolic cylinders, and the fourth reflector 5 or folder has a cutting edge 11 rectilinear the beam emitted by such a lighting module presents the isophote curve 400 shown in Figure 8.
- Curve 400 shows that the entire illumination beam emitted by the lighting module just described is below the limit directional or cutoff, i.e. in zone I.
- the first and third reflectors are such as those just described, the second reflector is removed, and the reflector is arranged so that that its reflective face includes the optical axis A2 of the first collecting reflector 2.
- the light source 6 is arranged at the first focus F1 of the first reflector collector 2, most of the rays emitted by the source 6, after being reflected on the inner face 7, is returned to the second focus F2 or in the vicinity thereof.
- the cut edge 11 has a bevel 12 defining an oblique surface. This oblique surface 12 is determined so that the cut edge 11 is not at risk to intercept rays reflected by the first reflector 2 and passing beyond the second focus F2.
- the reflective surface 10 makes it possible to "fold" the images of the light source 6 which are reflected by the elliptical surface 7 of the first reflector 2 at the second focus F2.
- the first collector reflector 2 can extend up to the optical axis A1 of the output reflector 4, as shown in Figure 9.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Geometry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
- un deuxième réflecteur produisant une première partie du faisceau à coupure et ayant un axe optique passant par le second foyer dudit premier réflecteur,
- un troisième réflecteur produisant une deuxième partie du faisceau à coupure et ayant un axe optique passant par le second foyer dudit premier réflecteur,
- un quatrième réflecteur, dit plieuse, agencé entre ledit deuxième
réflecteur et ledit troisième réflecteur et comportant :
- un bord, dit bord de coupure, agencé au voisinage dudit second foyer dudit premier réflecteur de manière à former la coupure dans le faisceau d'éclairage,
- une face supérieure réfléchissante incluant lesdits axes optiques respectifs desdits deuxième et troisième réflecteur.
- le premier réflecteur collecteur comporte une surface de réflexion des rayons lumineux dont la coupe dans un plan est une ellipse,
- au moins une première source lumineuse est agencée au voisinage du premier foyer dudit réflecteur,
- un réflecteur de sortie produisant un faisceau à coupure et ayant un axe optique passant par le second foyer dudit premier réflecteur et perpendiculaire à l'axe optique dudit premier réflecteur,
- un réflecteur dit plieuse, agencé entre ledit premier réflecteur
collecteur et ledit réflecteur de sortie comportant :
- un bord, dit bord de coupure, agencé au voisinage dudit second foyer dudit premier réflecteur de manière à former la coupure dans le faisceau d'éclairage,
- une face supérieure réfléchissante incluant ledit axe optique du premier réflecteur collecteur.
- en référence à la figure 1 :
- que la surface 7 du premier réflecteur 2 pouvait ne pas être parfaitement elliptique et avoir d'autres profils spécifiques pour optimiser la répartition lumineuse dans le faisceau d'éclairage produit par le module 1, et que ceci impliquait que le premier réflecteur 2 ne devait pas être parfaitement de révolution,
- que les surfaces réfléchissantes 8 et 9 du deuxième 3 et du troisième réflecteur 4 étaient de forme sensiblement paraboloïdales, et
- en référence à la Figure 5,
- que la présence des ailettes 201 et 202 dans la zone Il était due à l'absence de correction de courbure de champ notamment après réflexion sur le troisième réflecteur 4.
- une coupe de ce réflecteur par un plan horizontal est une parabole, et
- la coupe dans un plan vertical contenant la source lumineuse est une ellipse.
Claims (29)
- Module (1) d'éclairage pour projecteur de véhicule réalisant un premier faisceau d'éclairage du type à coupure comportant :un premier réflecteur (2) comportant une surface (7) de réflexion des rayons lumineux dont la coupe dans un plan est une ellipse,au moins une première source lumineuse (6) agencée au voisinage du premier foyer (F1) dudit premier réflecteur (2),un deuxième réflecteur (3) produisant une première partie du faisceau à coupure et ayant un axe optique (A1) passant par le second foyer (F2) dudit premier réflecteur (2) et perpendiculaire à l'axe optique (A1) dudit premier réflecteur (2),un troisième réflecteur (4) produisant une deuxième partie du faisceau à coupure et ayant un axe optique (A1) passant par le second foyer (F2) dudit premier réflecteur (2) et perpendiculaire à l'axe optique (A1) dudit premier réflecteur (2),un quatrième réflecteur (5), dit plieuse, agencé entre ledit deuxième réflecteur (3) et ledit troisième réflecteur (4) et comportant :o un bord (11), dit bord de coupure, agencé au voisinage dudit second foyer (F2) dudit premier réflecteur (2) de manière à former la coupure dans le faisceau d'éclairage,o une face supérieure réfléchissante (10) incluant lesdits axes optiques (A1) respectifs desdits deuxième et troisième réflecteur (3, 4).
- Module (1) d'éclairage selon la revendication 1 caractérisé en ce que lesdits axes optiques (A1) desdits deuxième et troisième réflecteurs (3, 4) sont confondus.
- Module (1) d'éclairage selon l'une des revendications 1 ou 2 caractérisé en ce que ledit premier réflecteur (2) est agencé à l'arrière dudit deuxième réflecteur (3) de sorte que ledit premier réflecteur (2) est dissimulé par ledit deuxième réflecteur (3).
- Module (1) d'éclairage selon l'une des revendications 1 à 3 caractérisé en ce que ledit deuxième réflecteur (3) et ledit troisième réflecteur (4) ont un foyer (F2) agencé au voisinage dudit second foyer (F2) dudit premier réflecteur (2).
- Module (1) d'éclairage selon l'une des revendications 1 à 3 caractérisé en ce que ledit deuxième réflecteur (3) et/ou ledit troisième réflecteur (4) comportent une surface (8, 9) de réflexion des rayons lumineux dont la coupe dans un plan est une parabole.
- Module (1) d'éclairage selon l'une des revendications 1 ou 2 caractérisé en ce que ledit deuxième réflecteur (3) et/ou ledit troisième réflecteur (4) sont un réflecteur de type à surface complexe de réflexion des rayons lumineux.
- Module (1) d'éclairage selon l'une des revendications précédentes caractérisé en ce que ladite source lumineuse (6) est une diode électroluminescente.
- Module (1) d'éclairage selon l'une des revendications précédentes caractérisé en ce que ledit bord (11) de coupure est un bord biseauté définissant une surface oblique (12), ladite surface oblique (12) étant déterminée de sorte que ledit bord de coupure (11) n'intercepte pas les rayons réfléchis par ledit premier réflecteur (2) et passant au-delà dudit second foyer (F2).
- Module (1) d'éclairage selon la revendication précédente caractérisé en ce que ledit second foyer (F2) dudit premier réflecteur (2) se trouve au centre de la portion de ligne intersection entre ladite surface oblique (12) et ladite face supérieure (10) réfléchissante de ladite plieuse (5).
- Module (1) d'éclairage selon l'une des revendications précédentes caractérisé en ce que lesdits premier et troisième réflecteurs (2, 4) sont réalisés d'une seule pièce et/ou lesdits deuxième et quatrième réflecteurs (3, 5) sont réalisés d'une seule pièce.
- Module (1) d'éclairage selon l'une des revendications précédentes caractérisé en ce que lesdits deuxième, troisième et quatrième réflecteur (3, 4, 5) sont réalisés d'une seule pièce.
- Module (100) d'éclairage selon l'une des revendications précédentes caractérisé en ce qu'il comporte un cinquième réflecteur (14) recevant directement des rayons lumineux issus de ladite première source lumineuse (6), la surface réfléchissante (15) dudit cinquième réflecteur (14) étant telle qu'elle produit une troisième partie du faisceau à coupure.
- Module (100) d'éclairage selon la revendication 12 caractérisé en ce que lesdits premier, troisième et cinquième réflecteurs (2, 4, 14) sont réalisés d'une seule pièce.
- Module (100) d'éclairage selon la revendication 12 caractérisé en ce que lesdits premier et cinquième réflecteurs (2, 14) sont réalisés d'une seule pièce.
- Module (101) d'éclairage selon l'une des revendications 1 à 14 réalisant un deuxième faisceau d'éclairage sans coupure caractérisé en ce qu'il comporte :un réflecteur (18) dit sans coupure produisant ledit deuxième faisceau d'éclairage sans coupure et ayant un axe optique (A1) passant par le second foyer (F2) dudit premier réflecteur (2) et perpendiculaire à l'axe optique (A1) dudit premier réflecteur (2),une deuxième source lumineuse (20) agencée au voisinage du foyer (F3) dudit réflecteur (18) sans coupure.
- Module (101) d'éclairage selon la revendication précédente caractérisé en ce que la surface réfléchissante (19) dudit réflecteur (18) sans coupure est une surface sensiblement paraboloïdale à laquelle on applique un facteur de réduction suivant une direction perpendiculaire à l'axe optique (A2) dudit premier réflecteur (2) et à l'axe optique (A1) dudit réflecteur sans coupure (18).
- Module (101) d'éclairage selon la revendication 15 caractérisé en ce que ledit réflecteur sans coupure (18) est un réflecteur de type à surface complexe de réflexion des rayons lumineux.
- Module (102) d'éclairage selon l'une des revendications 1 à 11 caractérisé en ce qu'il comporte :un cinquième réflecteur (21) symétrique dudit premier réflecteur (2) par rapport au plan de la face supérieure réfléchissante (10) de ladite plieuse (5),une deuxième source lumineuse (27) agencée au voisinage du premier foyer (F4) dudit cinquième réflecteur (21).
- Module (102) d'éclairage selon la revendication 18 caractérisé en ce que :ledit bord de coupure (11) est un bord biseauté définissant une surface oblique (12), ladite surface oblique (12) étant déterminée de sorte que ledit bord de coupure n'intercepte pas les rayons réfléchis par ledit premier réflecteur (2) et passant au-delà dudit second foyer (F2), ladite surface oblique (12) étant réfléchissante et recevant une partie des rayons lumineux issus dudit cinquième réflecteur (21),ledit module (102) comporte un sixième réflecteur (23) recevant les rayons lumineux issus de ladite surface oblique (12), ledit sixième réflecteur (23) ayant une surface (24) sensiblement paraboloïdale de réflexion des rayons lumineux avec un foyer agencé au voisinage dudit second foyer (F2) dudit premier réflecteur (2).
- Module (102) d'éclairage selon l'une des revendications 18 ou 19 caractérisé en ce qu'il comporte un septième réflecteur (25) recevant directement les rayons lumineux issus de ladite deuxième source lumineuse (27) et ayant une surface (26) sensiblement paraboloïdale de réflexion des rayons lumineux.
- Module (1) d'éclairage selon l'une des revendications précédentes caractérisé en ce que ladite plieuse comporte une surface (400) correctrice de la courbure de champ située le long dudit bord de coupure (11) et dans la continuité de ladite face supérieure (10) de ladite plieuse (5) de sorte qu'aucun rayon issu dudit premier réflecteur (2) et renvoyé vers ledit troisième réflecteur (4) ne dépasse ladite coupure.
- Module (1) d'éclairage selon la revendication précédente caractérisé en ce que ladite surface correctrice absorbe la lumière.
- Module (1) d'éclairage selon la revendication 21 caractérisé en ce que ladite surface correctrice (400) est réfléchissante et est inclinée d'un angle déterminé par rapport au plan de ladite face supérieure réfléchissante (10) de ladite plieuse de sorte que les rayons issus dudit premier réflecteur (3) et qui auraient été renvoyés au-dessus de la coupure en l'absence de ladite surface correctrice soient entièrement réfléchis dans une direction opposée à la direction dudit premier faisceau d'éclairage.
- Module (1) d'éclairage selon l'une des revendications 1 à 20, caractérisé en ce que le premier réflecteur (2) est constitué d'une surface ellipso-parabolique.
- Module (1) d'éclairage selon la revendication précédente, caractérisé en ce que le deuxième réflecteur (3) est un cylindre parabolique.
- Module (1) d'éclairage selon la revendication 24 ou la revendication 25, caractérisé en ce que le troisième réflecteur (4) est un cylindre parabolique.
- Module d'éclairage pour projecteur de véhicule réalisant un faisceau d'éclairage du type à coupure comportant :un premier réflecteur collecteur (2) comportant une surface (7) de réflexion des rayons lumineux dont la coupe dans un plan est une ellipse,au moins une première source lumineuse (6) agencée au voisinage du premier foyer (F1) dudit premier réflecteur (2),un réflecteur de sortie (4) produisant un faisceau à coupure et ayant un axe optique (A1) passant par le second foyer (F2) dudit premier réflecteur (2) et perpendiculaire à l'axe optique (A2) dudit premier réflecteur (2).Un réflecteur (5), dit plieuse, agencé entre ledit premier réflecteur collecteur (2) et ledit réflecteur de sortie (4) et comportant :o Un bord (11) dit bord de coupure, agencé au voisinage dudit second foyer (F2) dudit réflecteur (2) de manière à former la coupure dans le faisceau d'éclairage,o Une face supérieure réfléchissante (10) incluant ledit axe optique (A2) du premier réflecteur collecteur (2).
- Module d'éclairage selon la revendication 27, caractérisé en ce que le premier réflecteur (2) est constitué d'une surface ellipso-parabolique.
- Module d'éclairage selon la revendication 27 ou la revendication 28,
caractérisé en ce que le troisième réflecteur de sortie (4) est un cylindre parabolique.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0312833A FR2861831B1 (fr) | 2003-10-31 | 2003-10-31 | Module d'eclairage pour projecteur de vehicule |
FR0312833 | 2003-10-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1528312A1 true EP1528312A1 (fr) | 2005-05-04 |
EP1528312B1 EP1528312B1 (fr) | 2015-05-27 |
Family
ID=34400899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP04292527.1A Expired - Lifetime EP1528312B1 (fr) | 2003-10-31 | 2004-10-25 | Module d'éclairage pour projecteur de véhicule |
Country Status (4)
Country | Link |
---|---|
US (2) | US7347600B2 (fr) |
EP (1) | EP1528312B1 (fr) |
JP (1) | JP4773705B2 (fr) |
FR (1) | FR2861831B1 (fr) |
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FR2917811A1 (fr) * | 2007-06-25 | 2008-12-26 | Valeo Vision Sa | Module d'eclairage pour projecteur de vehicule automobile |
EP2131098A1 (fr) * | 2008-06-06 | 2009-12-09 | Valeo Vision | Module d'éclairage pour projecteur de véhicule automobile |
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FR3077367A1 (fr) * | 2018-01-31 | 2019-08-02 | Valeo Vision | Module lumineux bi-fonction avec surface eclairee commune |
FR3130011A1 (fr) * | 2021-12-07 | 2023-06-09 | Valeo Vision | Dispositif lumineux d’un véhicule automobile |
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US9476556B2 (en) | 2013-01-04 | 2016-10-25 | Honda Motor Co., Ltd. | Vehicle headlight assembly |
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Publication number | Priority date | Publication date | Assignee | Title |
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FR2899668A1 (fr) * | 2006-04-06 | 2007-10-12 | Valeo Vision Sa | Module d'eclairage pour projecteur lumineux de vehicule automobile, et projecteur comportant un tel module. |
US7543964B2 (en) | 2006-04-06 | 2009-06-09 | Valeo Vision | Lighting module for a motor vehicle light headlamp, and headlamp comprising a module of this type |
EP1843085A1 (fr) * | 2006-04-06 | 2007-10-10 | Valeo Vision | Module d'éclairage pour projecteur lumineux de véhicule automobile, et projecteur comportant un tel module |
US7918595B2 (en) | 2007-06-25 | 2011-04-05 | Valeo Vision | Lighting module for motor vehicle headlight |
FR2917811A1 (fr) * | 2007-06-25 | 2008-12-26 | Valeo Vision Sa | Module d'eclairage pour projecteur de vehicule automobile |
EP2009346A1 (fr) * | 2007-06-25 | 2008-12-31 | Valeo Vision | Module d'éclairage pour projecteur de véhicule automobile |
EP2131098A1 (fr) * | 2008-06-06 | 2009-12-09 | Valeo Vision | Module d'éclairage pour projecteur de véhicule automobile |
FR2932245A1 (fr) * | 2008-06-06 | 2009-12-11 | Valeo Vision Sas | Module d'eclairage pour projecteur de vehicule automobile |
CN102460002A (zh) * | 2009-04-21 | 2012-05-16 | 法雷奥照明公司 | 具有改善的远光功能的用于车辆的照明模块和装置 |
WO2010121948A1 (fr) * | 2009-04-21 | 2010-10-28 | Valeo Vision | Module et dispositif d'eclairage pour vehicule avec fonction route amelioree |
US8545073B2 (en) | 2009-04-21 | 2013-10-01 | Valeo Vision | Lighting module and device for vehicle with improved high-beam function |
CN102192460A (zh) * | 2010-03-03 | 2011-09-21 | 汽车照明罗伊特林根有限公司 | 具有光源和至少两个用于分布光线的光学元件的机动车前照灯 |
CN102192460B (zh) * | 2010-03-03 | 2015-08-05 | 汽车照明罗伊特林根有限公司 | 具有光源和至少两个用于分布光线的光学元件的机动车前照灯 |
CN105698089A (zh) * | 2016-03-14 | 2016-06-22 | 斯比夫(西安)照明技术有限公司 | 铁路机车室外照明用高聚光型反光镜 |
CN105698089B (zh) * | 2016-03-14 | 2018-06-22 | 斯比夫(西安)照明技术有限公司 | 铁路机车室外照明用高聚光型反光镜 |
FR3077367A1 (fr) * | 2018-01-31 | 2019-08-02 | Valeo Vision | Module lumineux bi-fonction avec surface eclairee commune |
EP3521692A1 (fr) * | 2018-01-31 | 2019-08-07 | Valeo Vision | Module lumineux bi-fonction avec surface eclairée commune |
US10801687B2 (en) | 2018-01-31 | 2020-10-13 | Valeo Vision | Bi-functional light module with common illuminated surface |
FR3130011A1 (fr) * | 2021-12-07 | 2023-06-09 | Valeo Vision | Dispositif lumineux d’un véhicule automobile |
WO2023104833A1 (fr) * | 2021-12-07 | 2023-06-15 | Valeo Vision | Dispositif lumineux d'un véhicule automobile |
Also Published As
Publication number | Publication date |
---|---|
JP4773705B2 (ja) | 2011-09-14 |
FR2861831A1 (fr) | 2005-05-06 |
US7347600B2 (en) | 2008-03-25 |
US20050094402A1 (en) | 2005-05-05 |
FR2861831B1 (fr) | 2006-01-20 |
US20080137358A1 (en) | 2008-06-12 |
US7604385B2 (en) | 2009-10-20 |
JP2005135919A (ja) | 2005-05-26 |
EP1528312B1 (fr) | 2015-05-27 |
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