EP1843085B1 - Beleuchtungsmodul für Scheinwerfer eines Motorfahrzeugs und Scheinwerfer, der ein solches Modul umfasst - Google Patents

Beleuchtungsmodul für Scheinwerfer eines Motorfahrzeugs und Scheinwerfer, der ein solches Modul umfasst Download PDF

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Publication number
EP1843085B1
EP1843085B1 EP07290389A EP07290389A EP1843085B1 EP 1843085 B1 EP1843085 B1 EP 1843085B1 EP 07290389 A EP07290389 A EP 07290389A EP 07290389 A EP07290389 A EP 07290389A EP 1843085 B1 EP1843085 B1 EP 1843085B1
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European Patent Office
Prior art keywords
reflector
module
bender
light
optical axis
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EP07290389A
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English (en)
French (fr)
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EP1843085A1 (de
Inventor
Pierre Albou
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Valeo Vision SAS
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Valeo Vision SAS
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—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
    • 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
    • F21S41/30—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
    • 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
    • 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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings

Definitions

  • the document GB 399 121 A shows a module of this type
  • a lighting module of this type is known, for example according to the patent US 6,966,675 .
  • Such a module gives satisfaction with the light beam obtained, but poses integration problems in the vehicle body.
  • the second reflector, of parabolic type whose dimensions are relatively large is in the upper part which generally corresponds to a smaller area because of the shape of the mirror of the projector, imposed by the style of the body of the vehicle, hence a problem of integration in it.
  • a first object of the invention is to provide a lighting module which, while allowing to obtain a cut-off beam, has a smaller footprint in the upper part.
  • the light source is generally constituted by at least one light emitting diode.
  • several diodes are used arranged in the same plane and aligned to facilitate connections by welding and cooling of the diodes. This results in a significant dimension of the printed circuit board (PCB or Printed Circuit Board) in the transverse direction of alignment and, again, an integration problem for a projector composed of several modules juxtaposed.
  • PCB printed circuit board
  • Another object of the invention is to provide a lighting module of the kind defined above which can be easily combined with other modules to allow to form a projector in a reduced transverse size.
  • the lighting module remains relatively simple and economical manufacturing.
  • the light source may be located in the middle plane of the folder.
  • the characteristic concerned can be expressed as follows: the folder is arranged so as to let the light rays, coming from the first reflector, intersect the (substantially) horizontal plane containing the axis optic between the focus and the top of the second reflector.
  • the first ellipsoidal reflector turns its concave reflecting surface forward and the source illuminates towards the rear, while the folder has a reflective surface facing the first reflector, the lower edge of the Folder constituting the cutting edge.
  • the average plane of the folder forms an acute angle less than 90 °, in particular about 45 °, with the optical axis.
  • the light source may be constituted by at least one rear-facing light-emitting diode, and a finned radiator, for dissipating the heat produced by the diode (s), is turned forward.
  • the cutting edge of the folder may be bent, in a plane perpendicular to the folder, along a convex line lowering on either side of a vertex at a horizontal tangent, to make the cut line of the given beam rectilinear. by the module.
  • the folder is arranged to close the elliptical mirror forward, the light source illuminating forwards.
  • the average plane of the folder forms an angle with the plane of the source, the cutting edge of the folder being formed by its lower edge passing through the focus of the second reflector.
  • the cutting edge of the folder can be rectilinear and the second reflector is then a parabolic cylinder.
  • the cutting edge of the folder can be bent, substantially in a quarter of sinusoid.
  • the invention also relates to a light projector comprising in the lower part at least one module as defined above.
  • the luminous headlamp may comprise, at the top, a module having a light source illuminating forwards, an ellipsoidal type reflector situated in front of the source and reflecting the light towards the rear, the light source being situated in a plane parallel to the folder of the lower module, and forward, the plane of the source containing a folder located above the source, the upper edge of the folder constituting the cutting edge of the high module, which comprises a second reflector type parabolic located above the first reflector.
  • the light sources of the high and low modules are advantageously constituted by two diodes, or series of light-emitting diodes arranged on opposite faces of the same support.
  • the light projector comprises at least one module at the bottom, the light source is arranged to illuminate forwards, and the light sources of the low and high modules are constituted by two diodes, or series of diodes. electroluminescent devices arranged on the same face of a printed circuit support. The diodes are preferably aligned.
  • the first reflectors of the low and high modules of the projector are arranged substantially at the same level in the vertical direction so that a dead zone, created in the beam by these reflectors, has a reduced height.
  • the projector can have a light function of reduced height in front of the dead zone.
  • the projector comprises two sets of several superimposed modules.
  • a lighting module M for a motor vehicle headlamp, intended to give a cut-off beam, in particular a coded beam.
  • the module is shown in position mounted on a vehicle, to illuminate forwards, ie to the right according to Fig.1 , the optical axis of the module being horizontal.
  • the module comprises a light source S constituted by at least one light emitting diode 1 which illuminates towards a first reflector R1 of ellipsoidal type, constituted by a portion of ellipsoid, or of a surface close to an ellipsoid, rotating its concave reflecting surface towards the 'before.
  • This reflector R1 comprises a first focus F1 to which (or in the vicinity of) is disposed the source S, which illuminates towards the rear, and a second focus F2 located on or in the vicinity of the optical axis A of the module.
  • a folder B essentially flat according to Fig. 1 , has a reflecting surface facing the first reflector R1.
  • the average plane of the folder B forms an angle ⁇ with the optical axis A.
  • this angle ⁇ is less than 90 °, in particular about 45 °.
  • source luminous S is located in a plane containing folder B.
  • plane of the source designates a plane passing through the source and orthogonal to the mean direction of the source radiation.
  • the lower edge C of the folder constitutes the cutting edge.
  • a second reflector R2 of parabolic type, is arranged so as to reflect forwards the cut-off beam of the module.
  • the focus ⁇ of the second reflector is coincident with the second focus F2 of the first reflector R1, or located in its vicinity.
  • the optical axis A of the module is constituted by the optical axis of the second reflector R2 coincides with the geometric axis of this reflector.
  • the reflector R2 may consist only of a surface portion which stops before the geometric vertex 2 of the parabolic section located on the geometric axis.
  • the cutting edge C of the folder passes through the focus ⁇ of the second reflector or in its vicinity.
  • the image of the edge C given by the reflector R2 determines the cutoff line of the light beam of the module.
  • the folder B is arranged so as to pass directly light rays such as ⁇ 1 which intersect the optical axis A of the second reflector R2 between the focus ⁇ and the top 2 of the second reflector.
  • the radius ⁇ 1 comes from the first reflector R1, after reflection of a ray i1 from the source S. Such a radius ⁇ 1 is reflected in ⁇ 1 by R2 forward in a direction that deviates from the optical axis A of the back to the front.
  • the second reflector R2 is located below the horizontal plane passing through the optical axis A, when it is in place on the vehicle. Under these conditions, the reflected ray ⁇ 1 is directed downwards below the cut-out constituted by the image of the edge C given by the reflector R2. The reflected ray ⁇ 1 will not be a source of glare for a driver coming in the opposite direction.
  • This radius ⁇ 3 is reflected by the second reflector R2 according to a ray ⁇ 3 towards the front which deviates from the optical axis A and is therefore descending.
  • the second reflector R2 parabolic type whose dimensions are larger than those of the first Reflector R1 is in the lower part and is easier to integrate into a body considering the curve generally found on vehicles.
  • the beam remains of the cut-off type below a line at least partly horizontal, to avoid the glare of a driver coming in the opposite direction.
  • the optical surfaces of the module can be simple, ellipsoid and paraboloid. Control of the distribution of light is effected by deformations of the collector reflector R1, and the shape of the cut is determined by the edge C of the folder, "imaged" by the output paraboloid R2.
  • a radiator (4) with vanes, to dissipate the heat produced by the diodes, is turned towards the front. This arrangement creates a style effect, the radiator 4 being visible to an observer located in front of the vehicle.
  • Fig. 2 is a schematic section of a projector with, at the bottom, a module M similar to that of Fig. 1 , having a second reflector R2 located below the horizontal plane passing through the optical axis.
  • the projector is provided, at the top, with a module H of the type described in the patent US 6,966,675 .
  • the module H comprises a light source 5, preferably formed by one or more light-emitting diodes, illuminating towards the front, and a reflector 6 of ellipsoidal type situated in front of the source 5 and reflecting the light towards the rear.
  • the light source 5 is located in a plane parallel to the folder B of the lower module M, and in front.
  • the plane of the source 5 contains a folder 7 located above the source 5.
  • the upper edge 8 of the folder 7 constitutes the cutting edge of the module H, which comprises a second reflector 9 parabolic type.
  • the reflector 9 is located above the first reflector 6 and the optical axis 10 of the module H coincides with the optical axis of the reflector 9.
  • the optical axis 10 is parallel to the optical axis A.
  • the cutting edge 8 of the folder 7 is at the focus of the reflector 9 coincides with the second focus of the reflector 6.
  • the source 5 is at the first focus of the reflector 6.
  • the first reflectors R1 and 6 are arranged substantially at the same level in the vertical direction so that a dead zone 11, created in the beam by these reflectors, has a reduced height. It is possible to install ahead of this dead zone 11 a function reduced height lighting for example a function DRL (daylighting projector).
  • a function DRL daylighting projector
  • the light-emitting diodes 1, 5, as well as the associated folders B and 7, are respectively disposed on two opposite faces of the same support 12.
  • the printed circuit boards (PCB) for each of the diodes 1, 5 are thus separated and located on both opposite sides of the support 12.
  • the bundle of the bottom module M has a convex cut line upwards.
  • the cutoff edge 8 is rectilinear, the cutoff line of the resulting beam has a concave shape upwards, substantially in V.
  • the cutoff line of the beam given by the low module M can be made rectilinear by bending the edge of the folder C in a plane 13 ( Fig.3 perpendicular to the folder and containing its "imaged" edge.
  • This curved edge 14, viewed from the front, is illustrated on Fig. 5 and corresponds substantially to a portion of sinusoid whose vertex, horizontal tangent, is located in the vicinity of the optical axis of the module M.
  • the lateral ends of the edge 14 admit a substantially horizontal tangent.
  • the edge of the folder would be bent in the opposite direction to the edge 14.
  • Fig. 2 allows to obtain a high luminous flux.
  • the transverse bulk is relatively small compared to a solution consisting in juxtaposing two high modulus modules H.However, the head-to-toe arrangement of the light-emitting diodes 1, 5 requires two printed circuits, one on each side of the support 12, this which leads to additional manufacturing costs.
  • the light emitting diode 1 is arranged to illuminate forwards, while the first reflector R1 of ellipsoidal type is rotated to reflect rearwardly.
  • Diode 1 is located at the first focus F1 of the reflector R1 whose second focus F2 is located further back than the first.
  • a mirror 16, essentially flat, vertical, is disposed below the diode 1 substantially in its plane, to intercept the light rays heading towards the focus F2. The rays are reflected to converge in a focal point F'2 which corresponds to the image of F2 given by the mirror 16.
  • This focal point F'2 which constitutes the focus of the assembly formed by the reflector R1 and the mirror 16, is confused with the, or neighbor of, the focus ⁇ of the second parabolic reflector R2 found in the lower part.
  • the folder B is located in a substantially vertical plane with its cutting edge C constituted by its lower edge passing through the focus ⁇ .
  • an ellipsoidal reflector sector 17 having its first focal point coinciding with F1 and its second focal point coinciding with the point F'2 may be provided.
  • This sector 17 makes it possible to recover light emitted by the diode 1 in directions close to the vertical and which, if it were reflected by R1, would be intercepted by the support of the diode 1, and would be lost.
  • Fig.6 allows to have the light-emitting diode 1 turned forward so that by combining the module of Fig.6 with a high module such as H of Fig.2 the light-emitting diodes of the two modules all illuminate forwards and can be installed on the same face of a printed PCB. Manufacturing is simplified, especially for making electrical connections. The evacuation of the heat released by the diodes can be provided by a traditional radiator located on the opposite side of the PCB to the diodes. However, all the reflectors according to Fig.6 is relatively complicated and can not be demolded at one time.
  • Fig.7 shows an advantageous embodiment in which the relative position of the folder B and the other surfaces of the reflectors R1, R2 is modified. The manufacturing advantages mentioned above are preserved.
  • the ellipsoid type reflector R1 and the parabolic type reflector R2 retain substantially the same relative positions as in the previous embodiments, but the folder B comes, as it were, to close the front part of the reflector R1.
  • the average plane of the folder B forms with the optical axis A an acute angle ⁇ .
  • the cutting edge C of the folder passes through the focus ⁇ of the reflector R2 coincides, or substantially coincides, with the second focus F2 of the reflector R1.
  • Folder B from its cutting edge C, rises forward to join the lower edge of the reflector R1.
  • the light emitting diode 1 is located at the first focus F1 of the reflector R1, and illuminates towards the front, in the direction of this reflector R1.
  • ⁇ is the distance between the horizontal lines touching the ends of the reflector R2 and f the focal length of the reflector R2. This distance f corresponds to the distance between the focus ⁇ and the vertex 2 of this reflector.
  • the focal length f is determined by the reflection of the last radius ⁇ d ( Fig.7 ).
  • the angle ⁇ is then determined by the reflection of the first radius ⁇ p along the optical axis A.
  • the angle ⁇ of a strictly positive angle ⁇ (preferably 10 °) is increased in order to improve the flow efficiency. It is thus possible to recover some rays which, if not, are reflected towards the rear and the support of the diode 1.
  • the folder B taking into account its orientation, realizes the symmetry of the concentration spot.
  • the second focus F2 in a plane that contains neither nor is perpendicular to any of the axes of the collector ellipsoid R1.
  • the light beam must be deformed.
  • deformation of the primary mirror R1 is provided.
  • Controlling the cutting of the beam, provided by the cutting edge C, can be performed as follows, in the case of a flat-cut light beam.
  • the surfaces searched for are unique and can be determined by explicit parametric equations. We thus obtain beams to sharp cut and whose distribution is adjustable by the shape given to the edge C of the folder.
  • Fig.8 schematically illustrates in perspective a module as defined above with folder B whose cutoff edge C is rectilinear.
  • the output reflector R2 is a parabolic cylinder.
  • Fig.9 illustrates the isolux curves L8 obtained on a screen placed at a determined distance from the module.
  • the network of curves Fig.9 shows that the light beam of the module is relatively concentrated.
  • Fig.10 illustrates an alternative embodiment of the module with three conjugate surfaces according to which the cutting edge C of the folder is bent, substantially in a quarter of a sinusoid.
  • the L10 isolux network of the light beam produced by such a module, illustrated on Fig.11 shows that the beam is more spread than in the case of the Fig.8 .
  • the third embodiment of the Fig. 7 to 11 provides a clean cut and eliminates the risk of fuzzy cut and glare.
  • For the manufacture of the module through the presence of a drawer in the injection tool, it is possible to mold all surfaces in one piece.
  • Fig.12 illustrates a set of two modules M1 and H1 according to which the diodes 1 and 5 are located on one side of the support, on the same printed circuit, contrary to the case of Fig.2 .
  • the cooling of the diodes 1 and 5 can then be carried out conventionally by one or more radiator elements 18 arranged at the rear of the diode support.
  • Fig.13 illustrates in side view, the two reflectors R1 and R2 and the folder C which closes the lower part of the reflector R1.
  • the cuts of the folder B by orthogonal planes at the cutoff edge C are straight lines d1, d2, d3 which, in side view, are parallel.
  • Fig.14 illustrates schematically in front view a projector P composed of three high modules H1, H2, H3 and three low modules M1, M2, M3 according to the invention.
  • the projector P thus comprises two superposed rows of modules, substantially symmetrical to one another with respect to a median horizontal plane.
  • the transverse bulk is relatively small for a projector whose luminous flux is high compared to a projector which, to produce the same luminous flux, would comprise six modules of the high module type, juxtaposed in a single row.
  • a light band is essentially produced, with a dark band located on the side of the light band opposite to the second reflector. Such a dark band can be masked, in particular by implementing additional lighting functions.

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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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (17)

  1. Beleuchtungseinheit für einen Kraftfahrzeugscheinwerfer, die zur Abgabe eines Lichtbündels mit Hell-Dunkel-Grenze, insbesondere eines Abblendlichts, bestimmt ist, wobei die Beleuchtungseinheit eine optische Achse (A) aufweist und umfasst:
    - wenigstens eine Lichtquelle (S),
    - einen ersten Reflektor (R1) vom ellipsoiden Typ, der von einem Ellipsoid-Bereich oder einem ellipsoidähnlichen Flächenstück gebildet ist, mit einem ersten Brennpunkt (F1), in dem oder in dessen Nähe die Lichtquelle (S) angeordnet ist, um zum ersten Reflektor zu strahlen, und mit einem auf der optischen Achse der Beleuchtungseinheit liegenden zweiten Brennpunkt (F2),
    - eine Ablenkfläche (B) mit einer Reflexionsfläche und einem Begrenzungsrand (C),
    - und einen zweiten Reflektor (R2) vom paraboloiden Typ, um das Lichtbündel mit Hell-Dunkel-Grenze der Beleuchtungseinheit nach vorne abzugeben, wobei der Brennpunkt (ϕ) des zweiten Reflektors mit dem zweiten Brennpunkt (F2) des ersten Reflektors zusammenfällt oder in dessen Nähe liegt, wobei die optische Achse des zweiten Reflektors mit der optischen Achse (A) der Beleuchtungseinheit zusammenfällt, und wobei der Begrenzungsrand (C) der Ablenkfläche durch den Brennpunkt (ϕ) des zweiten Reflektors oder in dessen Nähe verläuft,
    - wobei die Ablenkfläche (B) solchermaßen angeordnet ist, dass die vom ersten Reflektor (R1) stammenden Lichtstrahlen (ρ1), die in Orthogonalprojektion in der die optische Achse umfassenden, im Wesentlichen vertikalen Ebene die optische Achse des zweiten Reflektors zwischen dem Brennpunkt (ϕ) und dem Scheitel (2) des zweiten Reflektors schneiden, passieren können, und die vom ersten Reflektor stammenden Lichtstrahlen (p3), die die optische Achse des zweiten Reflektors bezüglich des Brennpunkts (ϕ) des zweiten Reflektors auf der dem Scheitel (2) abgewandten Seite schneiden würden, reflektiert werden, so dass die vom zweiten Reflektor nach vorne reflektierten Strahlen (µ1, µ.3) sich von dessen optischer Achse (A) entfernen oder zur optischen Achse parallel sind, die Mittelebene der Ablenkfläche (B) mit der optischen Achse (A) einen spitzen Winkel (ω) kleiner 90°, insbesondere von etwa 45° bildet, ein Strahl, der die optische Achse in einem bezüglich des Brennpunkts (ϕ) des zweiten Reflektors auf der dem Scheitel (2) abgewandten Seite liegenden Punkt schneiden würde, durch die Ablenkfläche (B) entlang eines Strahls (v3) reflektiert wird, der vom zweiten Reflektor (R2) reflektiert wird,
    dadurch gekennzeichnet, dass der zweite Reflektor (R2) unterhalb der durch die optische Achse (A) verlaufenden Horizontalebene liegt, wenn die Beleuchtungseinheit im Fahrzeug angebracht ist.
  2. Beleuchtungseinheit nach Anspruch 1,
    dadurch gekennzeichnet, dass die Lichtquelle (S) in der Mittelebene der Ablenkfläche (B) liegt.
  3. Beleuchtungseinheit nach Anspruch 2,
    dadurch gekennzeichnet, dass die konkave Reflexionsfläche des ersten Reflektors (R1) vom ellipsoiden Typ nach vorne gerichtet ist und die Lichtquelle (S) nach hinten strahlt, während die Ablenkfläche (B) eine zum ersten Reflektor (R1) gerichtete Reflexionsfläche aufweist, wobei der untere Rand der Ablenkfläche den Begrenzungsrand (C) bildet.
  4. Beleuchtungseinheit nach Anspruch 3,
    dadurch gekennzeichnet, dass die Lichtquelle von wenigstens einer nach hinten gerichteten Leuchtdiode (1) gebildet ist, und dass ein Rippenkühlkörper (4) zum Ableiten der von der (den) Leuchtdiode(n) erzeugten Wärme nach vorne gerichtet ist.
  5. Beleuchtungseinheit nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass der Begrenzungsrand (C) der Ablenkfläche in einer zur Ablenkfläche lotrechten Ebene (13) entlang einer konvexen Linie (14) gekrümmt ist, die sich beidseits eines Scheitels mit horizontaler Tangente nach unten neigt, um die Hell-Dunkel-Begrenzungslinie des von der Beleuchtungseinheit erzeugten Lichtbündels gerade auszurichten.
  6. Beleuchtungseinheit nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass die Ablenkfläche (B) so angeordnet ist, dass der Ellipsoidreflektor (R1) vorne geschlossen ist, wobei die Lichtquelle nach vorne strahlt.
  7. Beleuchtungseinheit nach Anspruch 6,
    dadurch gekennzeichnet, dass die Mittelebene der Ablenkfläche (B) mit der Ebene der Lichtquelle (S) einen Winkel (β) bildet, wobei der Begrenzungsrand (C) der Ablenkfläche durch deren unteren Rand gebildet ist, der durch den Brennpunkt (ϕ) des zweiten Reflektors (R2) verläuft.
  8. Beleuchtungseinheit nach Anspruch 6 oder 7,
    dadurch gekennzeichnet, dass die Flächen der beiden Reflektoren (R1, R2) und der Ablenkfläche (B) konjugierte Flächen sind, derart dass
    - der erste Reflektor (R1) eine aus der Mitte der Lichtquelle (S) ausgesandte Kugelwelle in eine sich am vorderen Rand (C) der Ablenkfläche abschwächende Wellenfläche umwandelt, wobei eine zweidimensionale Kurve gebildet wird;
    - der zweite Reflektor (R2) die vorhergehende Wellenfläche in eine zylindrische Welle mit senkrechter Achse umwandelt, die den vorderen Rand (C) der Ablenkfläche als geraden Querschnitt aufweist;
    - die Ablenkfläche (B) eine Regelfläche ist, die von einer Familie von Geraden gebildet ist, die zu deren vorderem Rand (C) lotrecht sind, und mit der Ebene (O, x, y) des Konstruktionsbezugssystems einen konstanten Winkel bildet.
  9. Beleuchtungseinheit nach Anspruch 8,
    dadurch gekennzeichnet, dass der Begrenzungsrand (C) der Ablenkfläche (B) geradlinig ist und der zweite Reflektor (R2) ein parabolischer Zylinder ist.
  10. Beleuchtungseinheit nach Anspruch 8,
    dadurch gekennzeichnet, dass der Begrenzungsrand (C) der Ablenkfläche (B) gekrümmt ist, im Wesentlichen entlang einer Viertel-Sinuskurve.
  11. Kraftfahrzeugscheinwerfer,
    dadurch gekennzeichnet, dass er im unteren Teil wenigstens eine Beleuchtungseinheit nach einem der vorhergehenden Ansprüche umfasst.
  12. Scheinwerfer nach Anspruch 11,
    dadurch gekennzeichnet, dass er im oberen Teil eine Beleuchtungseinheit (H) umfasst, mit einer nach vorne strahlenden Lichtquelle (5), einem Reflektor (6) vom ellipsoiden Typ, der vor der Lichtquelle (5) liegt und das Licht nach hinten reflektiert, wobei die Lichtquelle (5) in einer Ebene parallel zur Ablenkfläche (B) der unteren Beleuchtungseinheit (M) und vor dieser angeordnet ist, wobei die Ebene der Lichtquelle (5) eine über der Lichtquelle (5) liegende Ablenkfläche (7) umfasst, wobei der obere Rand (8) der Ablenkfläche (7) den Begrenzungsrand der oberen Beleuchtungseinheit (H) bildet, die einen zweiten Reflektor (9) vom paraboloiden Typ umfasst, der über dem ersten Reflektor (6) liegt.
  13. Scheinwerfer nach Anspruch 12,
    dadurch gekennzeichnet, dass die Lichtquellen von zwei Leuchtdioden oder Leuchtdiodenreihen (1, 5) gebildet sind, die auf den entgegengesetzten Seiten ein und desselben Trägers (12) angeordnet sind.
  14. Kraftfahrzeugscheinwerfer mit wenigstens einer Beleuchtungseinheit im oberen Teil mit einer nach vorne strahlenden Lichtquelle,
    dadurch gekennzeichnet, dass er im unteren Teil wenigstens eine Beleuchtungseinheit nach einem der Ansprüche 6 bis 10 umfasst, und dass die Lichtquellen durch Leuchtdioden oder Leuchtdiodenreihen gebildet sind, die auf der gleichen Seite einer Leiterplatte angeordnet sind.
  15. Scheinwerfer nach Anspruch 13 oder 14,
    dadurch gekennzeichnet, dass die ersten Reflektoren (R1, 6) in vertikaler Richtung im Wesentlichen in derselben Höhe angeordnet sind, so dass ein im Lichtbündel durch diese Reflektoren erzeugter Schattenbereich (11) eine geringe Höhe hat.
  16. Scheinwerfer nach Anspruch 15,
    dadurch gekennzeichnet, dass er vor dem Schattenbereich (11) eine Lichtfunktion mit geringer Höhe aufweist.
  17. Scheinwerfer nach einem der Ansprüche 11 bis 16,
    dadurch gekennzeichnet, dass er zwei Gruppen mit mehreren übereinanderliegenden Beleuchtungseinheiten (M1, M2, M3) (H1, H2, H3) umfasst.
EP07290389A 2006-04-06 2007-03-30 Beleuchtungsmodul für Scheinwerfer eines Motorfahrzeugs und Scheinwerfer, der ein solches Modul umfasst Active EP1843085B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0603062A FR2899668B1 (fr) 2006-04-06 2006-04-06 Module d'eclairage pour projecteur lumineux de vehicule automobile, et projecteur comportant un tel module.

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EP1843085A1 EP1843085A1 (de) 2007-10-10
EP1843085B1 true EP1843085B1 (de) 2010-06-16

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US (1) US7543964B2 (de)
EP (1) EP1843085B1 (de)
JP (1) JP5160130B2 (de)
AT (1) ATE471485T1 (de)
DE (1) DE602007007144D1 (de)
FR (1) FR2899668B1 (de)

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JP2008258001A (ja) * 2007-04-05 2008-10-23 Koito Mfg Co Ltd 車両用前照灯の灯具ユニット
FR2917811B1 (fr) 2007-06-25 2009-10-02 Valeo Vision Sa Module d'eclairage pour projecteur de vehicule automobile
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EP2112430B1 (de) * 2008-04-24 2011-06-08 Ichikoh Industries, Ltd. Lampeneinheit für Fahrzeuge
US7883250B2 (en) 2008-04-24 2011-02-08 Ichikoh Industries, Ltd. Lamp unit for vehicles
EP2112429B1 (de) * 2008-04-24 2011-06-15 Ichikoh Industries, Ltd. Lampeneinheit für Fahrzeuge
US7762700B2 (en) * 2008-05-28 2010-07-27 Osram Sylvania Inc. Rear-loaded light emitting diode module for automotive rear combination lamps
FR2932245B1 (fr) * 2008-06-06 2010-09-10 Valeo Vision Sas Module d'eclairage pour projecteur de vehicule automobile
FR2936458B1 (fr) 2008-09-26 2011-08-05 Valeo Vision Sas Systeme d'eclairage pour vehicule automobile apte a modifier l'emission d'un faisceau lumineux de type code
JPWO2011077947A1 (ja) * 2009-12-24 2013-05-02 コニカミノルタアドバンストレイヤー株式会社 車両用前照灯
FR2966221B1 (fr) * 2010-08-04 2015-09-18 Valeo Vision Module d'eclairage a coupure avec reflecteur parabolique dispose sur un reflecteur elliptique
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Publication number Publication date
JP5160130B2 (ja) 2013-03-13
FR2899668B1 (fr) 2009-11-20
JP2007280959A (ja) 2007-10-25
DE602007007144D1 (de) 2010-07-29
US7543964B2 (en) 2009-06-09
US20070236951A1 (en) 2007-10-11
FR2899668A1 (fr) 2007-10-12
ATE471485T1 (de) 2010-07-15
EP1843085A1 (de) 2007-10-10

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