EP1357334B2 - Elliptische Beleuchtungsbaugruppe ohne Lichtblende zur Erzeugung eines Abblendlichtes und Scheinwerfer mit einer derartigen Beleuchtungsbaugruppe - Google Patents

Elliptische Beleuchtungsbaugruppe ohne Lichtblende zur Erzeugung eines Abblendlichtes und Scheinwerfer mit einer derartigen Beleuchtungsbaugruppe Download PDF

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Publication number
EP1357334B2
EP1357334B2 EP03290971.5A EP03290971A EP1357334B2 EP 1357334 B2 EP1357334 B2 EP 1357334B2 EP 03290971 A EP03290971 A EP 03290971A EP 1357334 B2 EP1357334 B2 EP 1357334B2
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EP
European Patent Office
Prior art keywords
reflector
lighting
light
cut
module
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Expired - Lifetime
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EP03290971.5A
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English (en)
French (fr)
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EP1357334A1 (de
EP1357334B1 (de
Inventor
Pierre Albou
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Valeo Vision SAS
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Valeo Vision SAS
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Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Priority to SI200331115T priority Critical patent/SI1357334T1/sl
Publication of EP1357334A1 publication Critical patent/EP1357334A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • 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
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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
    • F21S41/36—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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/08—Optical design with elliptical curvature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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 motor vehicle lighting projector.
  • the present invention more particularly relates to a motor vehicle headlamp producing a cut-off type of lighting beam, comprising, arranged from back to front generally along a longitudinal horizontal optical axis, an elliptical type reflector which delimits a reflection volume for light rays and which has a substantially elliptical reflection surface, at least one light source which is arranged in the vicinity of a first focus of the reflector, and a converging lens whose focal plane is arranged in the vicinity of the second focus of the reflector.
  • Elliptical type projectors or projectors with optical image reproduction, are well known, especially for producing a cut-off lighting beam.
  • cut-off lighting beam is meant a lighting beam that has a directional limit, or cutoff, above which the light intensity emitted is low.
  • the dipped beam and fog lamp functions are examples of cut-off light beams in accordance with current European legislation.
  • the cut is made by means of a cover, which is formed of a vertical plate of suitable profile, which is interposed axially between the elliptical reflector and the convergent lens, and which is arranged in the vicinity of second focus of the reflector.
  • the cache makes it possible to mask the light rays coming from the light source and reflected by the reflector towards the lower part of the focal plane of the convergent lens, and which would, in the absence of a cover, be emitted by the projector above the cut.
  • a disadvantage of this type of projector is that a significant portion of the light energy emitted by the source is dissipated in the rear face of the cache.
  • the document US-A-4,914,747 corresponding to the preamble of the main claim, discloses a projector whose reflector comprises upper and lower parts in the form of half-ellipsoids with the same optical axis, the second foci of which coincide, the first focus of the upper reflector being located in front of that of the reflector inferior.
  • the projector comprises a lamp with two filaments, each arranged at one of the first focal points of the reflectors.
  • a flat screen is arranged parallel to the optical axis of the reflectors, the front edge of this screen being disposed in the vicinity of the second foci, coinciding themselves with the focus of a converging lens.
  • the document EP-A-1,193,440 discloses a projector producing a cutoff type lighting beam, comprising a semi-elliptical reflector, a light source arranged in the vicinity of the first focus of the reflector, a converging lens whose focal plane is arranged in the vicinity of the second focus of the reflector, and a horizontal planar reflective surface, the upper surface of which is reflective, the planar surface has a leading end edge which is arranged in the vicinity of the second focus of the reflector, so as to form the cut-off in the illumination beam.
  • the planar surface is pivotally mounted around its trailing edge so as to form a passing beam when it is parallel to the optical axis, and a driving beam when tilted.
  • the document EP-A-1357332 is a document according to art. 54 (3) and (4) EPC 1973 for Germany, France and Great Britain.
  • the invention proposes comprising a first lighting module a motor vehicle headlamp producing a cut-off type of lighting beam, comprising, arranged from rear to front globally along a longitudinal horizontal optical axis, an elliptical type reflector which delimits a reflection volume for light rays and which comprises a substantially elliptical reflection surface, at least one light source which is arranged in the vicinity of a first focus of the reflector, and a convergent lens whose focal plane is arranged in the vicinity of the second focal point of the reflector, the reflector having a horizontal plane reflective surface, the upper surface of which is reflective, which defines the reflection volume vertically downwards, the flat surface of the reflector having a front end edge, called the cutting edge, which is arranged in the vicinity of the second focus of the reflector, so as to form the cut in the lighting beam, the flat surface of the reflector being arranged in a horizontal plane passing generally through the reflector foci.
  • the planar surface of the reflector extends longitudinally rearwards, from its cutting edge, at least to the vicinity of the first focus of the reflector, the substantially elliptical surface of the reflector is formed by an angular sector of substantially revolution-shaped piece, about the longitudinal optical axis, and in that this angular sector extends vertically above the plane surface of the reflector, the light source is a light-emitting diode, and is arranged in the module so that its light scattering axis is substantially perpendicular to the flat surface of the reflector.
  • the inner face of the elliptical portion and the upper face of the flat surface are coated with a reflective material.
  • the majority of the light flux emitted by the source is used in the light beam produced by the module, in order to perform the associated regulatory lighting function.
  • the lighting module 10 comprises, arranged from rear to front along a longitudinal longitudinal optical axis AA, a reflector 12 of the elliptical type, a light source 14 which is arranged in the vicinity of a first focus F1 of the reflector 12, and a convergent lens 16 whose focal plane is arranged in the vicinity of the second focus F2 of the reflector 12.
  • the reflector 12 and the lens 16 form the optical system 11 of the lighting module 10.
  • the optical axis AA defines here, without limitation, a horizontal longitudinal direction and a back-to-front orientation, which corresponds to a left-right orientation on the Figures 2 and 3 .
  • the optical axis AA 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 the longitudinal optical axis A-A.
  • the lens 16 has, vis-à-vis the reflector 12, a transverse input surface 17 for the light rays.
  • the reflector 12 has an elliptical surface 18 which is formed as an angular sector substantially of revolution, and which extends in the half space above a plane horizontal axis passing through the longitudinal optical axis AA.
  • the inner face 20 of the elliptical surface 18 is reflective.
  • the elliptical surface 18 may not be perfectly elliptical and it can have several specific profiles provided to optimize the light distribution in the lighting beam produced by the module 10, according to the lighting function performed by the module 10. This implies that the reflector is not perfectly of revolution.
  • the reflector 12 comprises a horizontal flat surface 22 whose upper face 24 is reflective.
  • the reflector 12 defines a reflection volume for the light rays emitted by the source 14, that is to say a volume in which the light rays are emitted and in which the light rays are reflected.
  • This reflection volume is delimited, in its upper part, by the internal reflection face 20 of the elliptical surface 18, and vertically downwards by the reflecting face 24 of the flat surface 22.
  • the flat surface 22 extends here in a horizontal axial plane.
  • the plane surface 22 is delimited, at the rear, at its intersection with the elliptical surface 18, by an elliptical edge 26, and at the front, by a front longitudinal end edge 28. It may be alternatively provided that the planar surface 22 is delimited at the rear by a line segment perpendicular to the axis AA and passing in the immediate vicinity of the source 14, in front of the latter.
  • the front end edge 28 of the flat surface 22 is arranged in the vicinity of the second focus F2 of the reflector 12, so as to form a sharp enough cut in the illumination beam produced by the lighting module 10.
  • this front end edge 28 will be designated by "cutting edge 28".
  • the curved shape of this profile is more or less complex, and can be compared in first approximation to an arc of a circle. Therefore, preferably, the cutoff edge 28 has a curved profile, in the horizontal plane, so as to follow generally the profile of the focal plane of the lens 16.
  • the reflecting flat surface 22 comprises a semi-ellipsoidal rear section 30, which is delimited by the elliptical edge 26, and by the diameter 32 of the semi-circular front edge 34 of the elliptical surface 18.
  • the reflective flat surface 22 comprises a generally isosceles trapezoidal front section 36, which is delimited by the diameter 32 of the elliptical surface 18, by two lateral edges 38, 40, and by the cut-off edge 28.
  • the transverse width of the front section 36 increases progressively forward, so that the transverse width of the cutting edge 28 is substantially equal to the diameter of the entrance surface of the lens 16.
  • the flat surface 22 may comprise only a front section 36, which extends axially rearwardly, from the cutting edge 28 to a predetermined point in the optical axis AA located between the first F1 and the second F2 focal points of the reflector 12.
  • the light source 14 is designed to emit its light energy in less than a "half space" above the plane surface 22, and to emit its light energy towards the inner face 20 of the elliptical surface 18.
  • the light source 14 is an encapsulated light-emitting diode 44.
  • light-emitting diode 44 denotes the junction which produces the light energy as well as the globe or the light-diffusing capsule which envelops the upper part of the junction.
  • the light-emitting diode 44 is mounted on an electronic support plate 42, which is represented on the figure 3 , and which is arranged here parallel to the flat surface 22.
  • the light-emitting diode 44 has a light-scattering axis B-B which is here substantially perpendicular to the flat surface 22.
  • the light emitting diode 44 emits its light energy in a solid angle generally centered about its light scattering axis B-B, and less than 180 degrees.
  • This arrangement allows the diode 44 to emit the majority of its light energy towards the inner face 20 of the elliptical surface 18.
  • the principle of operation of the lighting module 10 according to the invention is as follows.
  • the light source 14 is of small extent around a point coincident with the first focus F1 of the elliptical reflector 18.
  • the light rays emitted by the light source 14 which pass above the cutting edge 28 and which will be designated by primary rays R1 are considered.
  • the light source 14 is arranged at the first focus F1 of the elliptical reflector 18, the majority 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 F2 focus of the reflector 18, or in the vicinity thereof.
  • These primary light rays R1 form, at the focus F2 of the lens 16, a concentrated light image which is projected, at the front of the lighting module 10, by the lens 16, in a direction substantially parallel to the longitudinal axis AA .
  • These secondary light rays R2 are reflected by the inner face 20 of the elliptical surface 18 to the reflecting flat surface 22, so that they are reflected a second time forward.
  • the secondary light rays R2 are transmitted towards the upper part of the input surface 17 of the lens 16. Therefore, because of its convergence properties, the lens 16 deflects secondary light rays R2 to the bottom. The secondary light rays R2 are therefore emitted under the cut-off in the lighting beam.
  • An advantage of the lighting module 10 according to the invention is that its optical system 11 does not obscure a significant portion of the light rays emitted by the source 14, as is the case in a conventional lighting module comprising a cache .
  • the reflecting flat surface 22 can "fold" the images of the light source 14 which are reflected by the elliptical surface 18 of the reflector 12 to the second focus F2 of the reflector 12.
  • each image would then comprise an upper portion located at above the cut-off edge 28 and a lower portion below the cut-off edge 28. Thanks to the reflecting flat surface 22, the lower portion of each image is reflected upwards, as if the lower portion were folded over the upper portion, so that these image portions are superimposed above the cutoff edge 28, in the vertical plane generated by the cutoff edge 28.
  • the "fold” formed by this "folding" of images contributes to forming a clean cut in the light beam projected by the lens 16.
  • the lighting module 10 also has particular advantages in the context of the use of a light emitting diode 44 as a light source 14 in a lighting module.
  • the image of the virtual source corresponding to a diode is generally round and diffuse.
  • the light source is a filament
  • its virtual image has the overall shape of a rectangle, so that it is relatively easy to make a clean cut by aligning the edges of the rectangles.
  • the light source is a diode, it is much more difficult to make a clean cut by aligning the corresponding images of round shapes.
  • the lighting module 10 makes it possible to make a clean cut with a diode 44, because it projects at the front the image of an edge of the optical system 11, that is to say the image of the edge cutoff 28.
  • the shape of the cut in the illumination beam is thus determined by the profile of the cut-off edge 28, in a projection on a vertical and transverse plane.
  • Another difficulty for the realization of a lighting module from a diode comes from the fact that the distribution of light energy in the light beam emitted by the diode is not homogeneous. Therefore, it is very difficult to achieve a homogeneous illumination beam from the direct images of the diode.
  • the lighting module 10 overcomes this difficulty by exploiting a property of the elliptical lighting modules which is to "mix" the images of the light source with the second focus F2 of the reflector 12, which improves the homogeneity of the light. lighting beam produced.
  • An advantage of the lighting module 10 according to the invention is that it exploits the property of the encapsulated diodes 44 to emit globally in a half space, which captures more than eighty percent of the luminous flux emitted by the diode 44, whereas in a traditional code elliptical projector, less than fifty percent of the luminous flux is captured.
  • the lighting module 10 is made by an assembly of discrete elements.
  • the lighting module 10 comprises, for example, an element 18 forming the elliptical portion of the reflector 12, an element 22 forming the flat surface of the reflector 12, and an element 16 forming the convergent lens.
  • the inner face of the elliptical portion 18 and the upper face of the flat surface 22 are for example coated with a reflective material.
  • the light source 14 is a light-emitting diode 44
  • the discrete elements in the form of polymer parts, assembled by example by interlocking.
  • the lens 16 may be a Fresnel lens.
  • the optical system 11 of the lighting module 10 is made in one solid optical part, 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 outer surface, here below, of the flat surface 22 of the reflector 12 are coated with a reflective material.
  • the total reflection properties in a medium of index greater than air to cause the reflection of the light rays in the reflection volume delimited by the reflector 12, without the use of reflective material.
  • the light rays which are emitted by the light source 14 propagate inside the material constituting the optical system 11 of the lighting module 10, then they leave the optical system 11 through the front face of the light source. the convergent lens 16.
  • the reflecting flat surface 22 comprises a cavity of complementary shape to the capsule of the light-emitting diode 44.
  • the cavity is substantially hemispherical.
  • the reflector 12 is made in one piece of transparent material, which is distinct from the piece forming the convergent lens 16.
  • the light source 14 can be made by means of several light-emitting diodes 44.
  • the light-emitting diodes 44 must be very close to each other, so that they are arranged generally at the first focus F1 of the reflector 12.
  • two diodes 44 are aligned, advantageously in a direction perpendicular to the longitudinal optical axis AA.
  • the resulting light source 14 is then equivalent to an extended light source width, since the light beams produced by each light emitting diode 44 overlap.
  • This arrangement of the diodes 44 thus makes it possible to widen the light beam produced by the lighting module 10.
  • a vehicle headlight is produced by means of several identical lighting modules 10 operating simultaneously.
  • the lighting modules 10 are arranged in parallel, that is to say that their optical axes A-A are substantially parallel to each other.
  • the light beams produced by each of the lighting modules 10 are superimposed on the front of the vehicle so as to form the regulatory lighting beam cutoff.
  • vehicle headlight 46 which performs a low beam function, or codes, and which uses four identical lighting modules.
  • crossing lighting beam must comprise a cutoff having a portion inclined at a given angle, for example fifteen degrees
  • two lighting modules 48 of the projector 46 are rotated by fifteen degrees, about their longitudinal optical axis AA, in such a way as to produce a lighting beam having an inclined cut of fifteen degrees with respect to a horizontal plane.
  • the other two lighting modules 50 form a lighting beam having a horizontal cut.
  • the superposition of the illumination beams produced by the four lighting modules 10 then forms a regulatory lighting beam having a horizontal portion and an inclined portion of fifteen degrees.
  • each lighting module 10 may be provided to individually produce a lighting beam having a cut in accordance with a regulatory beam of dipped beam.
  • the reflecting flat surface 22 comprises two parts 52, 54.
  • a first part of the reflecting surface 22 extends in a first half-plane 52 delimited by the longitudinal optical axis AA, and which extends to the right on the figure 8 .
  • This first half-plane 52 is contained in the horizontal plane. Its cutoff edge 56 is therefore horizontal, so that it realizes the horizontal part of the cut in the lighting beam produced by the module 10.
  • the reflecting flat surface 22 has a second reflecting portion 54 which extends in a second half-plane, delimited by the longitudinal optical axis AA, and this secondary flat surface 54 has, at the front, a cutting edge 58 which is inclined, with respect to the horizontal plane, by a determined angle ⁇ , for example fifteen degrees.
  • the light source 14 may be formed by the free end of an optical fiber bundle.
  • optical fibers form a light source comprising a light core and a dark ring, due to the sheath surrounding the heart of the fiber.
  • This type of light source when used in a vehicle lighting projector using for example a reflector of the complex surface type, thus forms, in the light beam, images in the form of pixels surrounded by an area dark, due to the sheath.
  • An advantage of the lighting module 10 according to the invention is that it allows all the images of the light source 14 to be mixed with the second focus F2 of the reflector 12, so that the lighting beam pixels of the optical fiber.

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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)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (5)

  1. Fahrzeugscheinwerfer (46), umfassend eine erste Beleuchtungseinheit (10), die ein Lichtbündel mit einer Helldunkelgrenze erzeugt, mit, von hinten nach vorne allgemein entlang einer horizontalen optischen Längsachse (A-A) angeordnet, einem Reflektor (12) vom ellipsoiden Typ, der einen Reflexionsraum für die Lichtstrahlen umgrenzt und der eine im Wesentlichen elliptische Reflexionsfläche (18, 20) aufweist, wenigstens einer Lichtquelle (14), die in der Nähe eines ersten Brennpunkts (F1) des Reflektors (12) angeordnet ist, und einer Sammellinse (16), deren Brennebene in der Nähe des zweiten Brennpunkts (F2) des Reflektors (12) angeordnet ist, wobei der Reflektor eine horizontale ebene Reflexionsfläche (22) aufweist, deren Oberseite (24) reflektierend ist, die senkrecht nach unten den Reflexionsraum begrenzt, wobei die ebene Fläche (22) des Reflektors (12) einen vorderen äußeren Rand (28), einen sogenannten Begrenzungsrand, umfasst, der in der Nähe des zweiten Brennpunkts (F2) des Reflektors (12) solchermaßen angeordnet ist, dass in dem Lichtbündel die Helldunkelgrenze gebildet wird, wobei die ebene Fläche (22) des Reflektors (18) in einer horizontalen Ebene angeordnet ist, die allgemein durch die Brennpunkte (F1, F2) des Reflektors (12) verläuft, wobei:
    - die Innenseite des elliptischen Abschnitts (18) und die Oberseite der ebenen Fläche (22) mit einem reflektierenden Material bedeckt sind,
    - sich die ebene Fläche des Reflektors von ihrem Begrenzungsrand längs nach hinten wenigstens bis in die Nähe des ersten Brennpunkts (F1) des Reflektors (12) erstreckt,
    - die im Wesentlichen elliptische Fläche (18, 20) des Reflektors (12) durch einen Winkelsektor eines im Wesentlichen rotationssymmetrischen Teils um die optische Längsachse (A-A) herum gebildet ist,
    - sich der Winkelsektor vertikal über der ebenen Fläche (22) des Reflektors (12) erstreckt,
    - die Lichtquelle (14) eine Leuchtdiode (44) ist oder durch das freie Ende eines Lichtwellenleiterbündels gebildet ist,
    - diese Lichtquelle in der Einheit (10) solchermaßen angeordnet ist, dass ihre Lichtstreuachse (B-B) zu der ebenen Fläche (22) des Reflektors (12) im Wesentlichen lotrecht ist,
    - der Scheinwerfer (46) zum Erzeugen eines vorschriftsmäßigen Abblendlichts vorgesehen ist, wobei der Begrenzungsrand (28) der ersten Beleuchtungseinheit (50) im Wesentlichen horizontal ist,
    - der Scheinwerfer eine zweite Beleuchtungseinheit (50) umfasst, wobei die beiden Beleuchtungseinheiten (10) im Wesentlichen identische Strukturen aufweisen und im Wesentlichen parallel zueinander angeordnet sind,
    wobei die zweite Beleuchtungseinheit (48), bezüglich der ersten Einheit (50) in einem bestimmten Winkel um ihre optische Achse (A-A) herum solchermaßen gedreht ist, dass ihr Begrenzungsrand (28) bezüglich einer horizontalen Ebene geneigt ist,
    derart, dass die von den beiden Einheiten (48, 50) erzeugten Lichtbündel sich überlagern und das vorschriftsmäßige Abblendlicht bilden.
  2. Scheinwerfer nach Anspruch 1, dadurch gekennzeichnet, dass die erste Einheit (10) mehrere benachbarte Lichtquellen (14) umfasst, die allgemein in einer im Wesentlichen horizontalen und zur optischen Längsachse (A-A) lotrechten Richtung solchermaßen ausgerichtet sind, dass das Lichtbündel in der Breite aufgefächert wird.
EP03290971.5A 2002-04-25 2003-04-18 Elliptische Beleuchtungsbaugruppe ohne Lichtblende zur Erzeugung eines Abblendlichtes und Scheinwerfer mit einer derartigen Beleuchtungsbaugruppe Expired - Lifetime EP1357334B2 (de)

Priority Applications (1)

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SI200331115T SI1357334T1 (sl) 2002-04-25 2003-04-18 Elipticni osvetljevalni modul brez zaslonke za tvorjenje zasencenega snopa in zaromet s taksnim modulom

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FR0205323A FR2839139B1 (fr) 2002-04-25 2002-04-25 Module d'eclairage elliptique sans cache realisant un faisceau d'eclairage a coupure et projecteur comportant un tel module
FR0205323 2002-04-25

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EP1357334A1 EP1357334A1 (de) 2003-10-29
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US (1) US6997587B2 (de)
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JP (1) JP4136773B2 (de)
AT (1) ATE377732T1 (de)
DE (1) DE60317254T2 (de)
ES (1) ES2297107T5 (de)
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SI (1) SI1357334T1 (de)

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ES2297107T3 (es) 2008-05-01
ES2297107T5 (es) 2018-12-12
DE60317254T2 (de) 2008-08-28
EP1357334A1 (de) 2003-10-29
DE60317254D1 (de) 2007-12-20
FR2839139B1 (fr) 2005-01-14
JP4136773B2 (ja) 2008-08-20
EP1357334B1 (de) 2007-11-07
US6997587B2 (en) 2006-02-14
SI1357334T1 (sl) 2008-04-30
FR2839139A1 (fr) 2003-10-31
US20030202359A1 (en) 2003-10-30
JP2003317515A (ja) 2003-11-07
ATE377732T1 (de) 2007-11-15

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