EP1500867B1 - LED module for a vehicular headlight and vehicular headlight comprising the same - Google Patents

LED module for a vehicular headlight and vehicular headlight comprising the same Download PDF

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Publication number
EP1500867B1
EP1500867B1 EP04013156A EP04013156A EP1500867B1 EP 1500867 B1 EP1500867 B1 EP 1500867B1 EP 04013156 A EP04013156 A EP 04013156A EP 04013156 A EP04013156 A EP 04013156A EP 1500867 B1 EP1500867 B1 EP 1500867B1
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EP
European Patent Office
Prior art keywords
light
emitting diode
diode module
reflector
surface region
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.)
Expired - Lifetime
Application number
EP04013156A
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German (de)
French (fr)
Other versions
EP1500867B8 (en
EP1500867A3 (en
EP1500867A2 (en
Inventor
Wilhelm Brandenburg
Oliver Hering
Thomas Reiners
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Osram GmbH
Original Assignee
Osram GmbH
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Publication date
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Publication of EP1500867A3 publication Critical patent/EP1500867A3/en
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Publication of EP1500867B1 publication Critical patent/EP1500867B1/en
Publication of EP1500867B8 publication Critical patent/EP1500867B8/en
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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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • 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
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

Definitions

  • the invention relates to a light-emitting diode module for a vehicle headlight according to the preamble of patent claim 1 and a vehicle headlight.
  • the publication WO 01/01037 A1 discloses a vehicle headlamp having a plurality of light emitting diodes serving as a light source.
  • the light beam emitted by the light-emitting diodes has at least two segments with light from different spectral regions.
  • a first segment of the light beam has a high proportion of white or yellow-orange light and a second segment has a high proportion of blue-green light.
  • the publication EP 1 298 382 A1 describes a light emitting diode module for a vehicle lamp with a reflector and a support for light emitting diodes, wherein the carrier has a flat surface on which the light emitting diodes are arranged.
  • EP 1 298 383 A2 discloses a replaceable LED lamp for vehicles with LED chips, which are arranged directly on the surface of a lamp capsule.
  • the publication EP 1 270 325 A2 describes a headlamp for vehicles with a light source having a plurality of arranged on a common, curved support light-emitting diodes.
  • EP 1 298 382 A1 discloses an LED lamp for vehicles with interchangeable lens optics.
  • the publication WO 01/01038 A1 describes a vehicle headlamp with a light source comprising a plurality of LEDs.
  • the light-emitting diode module according to the invention for a vehicle headlight has a reflector and a support for light-emitting diodes, wherein the support has at least one surface area on which several light-emitting diodes are arranged according to the invention along at least one curved line.
  • the light distributions for fog light, low beam, high beam, parking light or daytime running light can be generated.
  • asymmetrical light distribution of the low beam for example, only three of the light-emitting diode modules according to the invention are required in a vehicle headlight.
  • the at least one curved line, along which the light-emitting diodes are arranged advantageously corresponds to a section of a conic section, preferably an ellipse, in order to allow optimum adaptation to a free-form surface reflector.
  • the at least one surface region of the carrier on which the light-emitting diodes are mounted has a transverse to the optical axis of the reflector oriented longitudinal extent, so that the at least one curved line along which the light-emitting diodes are arranged extends substantially transverse to the optical axis of the reflector.
  • the aforementioned at least one surface region is preferably inclined with respect to the optical axis of the reflector, so that it faces a light-reflecting surface of the reflector, so that the largest possible proportion of the light emitted by the LEDs hits the reflector.
  • the at least one surface area is arched.
  • the curvature of the at least one line, along which the light-emitting diodes are arranged, is preferably determined by the curvature of the at least one surface region.
  • the at least one surface region has a longitudinal extent oriented transversely to the optical axis of the reflector, is arched in the direction of its longitudinal extension and is preferably inclined with respect to the optical axis, so that it faces a light-reflecting surface of the reflector.
  • the curved formation of the aforementioned surface area is to be understood such that this curved surface area can also be embodied facetted, that is, can consist of a multiplicity of planar facets, in order to ensure that a planar partial area is available for the assembly of the light-emitting diodes.
  • Each light-emitting diode can be fixed, for example, on a facet, wherein the size of the facet is matched to the dimensions of the light-emitting diode fixed thereon.
  • the curvature of the aforementioned at least one surface area corresponds to a conic and is preferably elliptical.
  • the light-emitting diodes mounted on this surface area are advantageously arranged along a line which corresponds to a conic section and preferably to the section of an ellipse.
  • the cone-shaped and preferably elliptical contour of the light source achieved in this way can advantageously be combined with a free-form surface reflector in order to generate the light distributions typical of vehicle headlamps.
  • the support of the light-emitting diode module has two surface regions, on each of which a plurality of light-emitting diodes are arranged, wherein a first surface area is concave and the second surface area is convex, and wherein the concavely curved first surface area of a first light-reflecting surface of the reflector facing and the convexly curved second surface region faces a second light-reflecting surface of the reflector.
  • the diodes arranged on the two differently curved surfaces can be optimally combined with a freeform surface reflector consisting of two halves.
  • this diode arrangement can produce a sharp cut-off line for the typical light distribution of the vehicle headlight, in particular for that of the low beam become.
  • the luminous flux and the luminous intensity of the light-emitting diode module are increased by the second, equipped with LEDs surface of the carrier and by the second light-reflecting surface of the reflector.
  • the vehicle headlight according to the invention comprises at least one light-emitting diode module which has a reflector and a support for light-emitting diodes, wherein the support has at least one surface area on which a plurality of light-emitting diodes are arranged according to the invention along at least one curved line.
  • the at least one light-emitting diode module arranged in the vehicle headlight according to the invention has the advantageous features already explained above.
  • the vehicle headlamp according to the invention which contains only light-emitting diodes as light sources
  • the same light distributions as with the conventional vehicle headlights, which are equipped with incandescent lamps or discharge lamps, can be generated.
  • the parking light can be generated.
  • the light distributions of the fog light, daytime running light or high beam can be generated, for example, with a vehicle headlamp according to the invention, which contains two juxtaposed erfindungsgemä ⁇ e light-emitting diode modules.
  • the vehicle headlight preferably contains at least three light-emitting diode modules according to the invention.
  • a first, widely fanned out light distribution is preferably generated whose light intensity maximum forms a narrow strip along the light-dark boundary of the light distribution.
  • a second light distribution directed at a point is preferably generated, the light intensity maximum of which is located at the central point at the light-dark boundary of the light distribution.
  • the illumination of the roadside facing away from oncoming traffic is preferably ensured by means of a third light-emitting diode module in the vehicle headlight, the Generation of an asymmetric light distribution, the so-called 15 degree asymmetric finger of the low-beam light distribution is used.
  • the light distributions of the three modules of the vehicle headlamp are superimposed and together result in the low beam distribution. If a higher luminous flux or a higher light intensity is desired, more than three light-emitting diode modules according to the invention can also be arranged in the vehicle headlight.
  • the light-emitting diode module 1 has a support 2 for a total of twenty light-emitting diodes, preferably light-emitting diodes 31, 32, which generate white light during operation, and a free-form surface reflector 4, which has two light-reflecting surfaces 41, 42.
  • the carrier 2 consists of a material of high thermal conductivity, for example of a metal or plastic, to dissipate the heat generated by the LEDs 31, 32.
  • the carrier 2 has a first, concavely curved surface 21, which faces the first light-reflecting surface 41 of the reflector 4 and arranged on the ten light-emitting diodes 31 in a row next to one another.
  • the concave curvature of the surface 21 of the support 2 extends transversely to the optical axis AA of the reflector 4.
  • the support 2 has a second, convexly curved surface 22, which faces the second light-reflecting surface 42 of the reflector 4 and on the also ten light-emitting diodes 32 are arranged in a row next to each other.
  • the curved surfaces 21, 22 are inclined relative to the optical axis AA of the reflector 4 in the direction of the light-reflecting surfaces 41 and 42, so that the light emitted by the light-emitting diodes 31 and 32, respectively, on the first 41 and second light-reflecting surface 42 of the reflector 4 hits.
  • the curvature of both surfaces 21, 22 is elliptical.
  • the light-emitting diodes 31 and 32 are each arranged along an ellipse section.
  • the surfaces 21, 22 may be faceted, so that each light-emitting diode 31, 32 is arranged on a flat surface portion. In the FIGS. 1 and 3 the shape of the carrier 2 and the surfaces 21, 22 is illustrated.
  • the head of the carrier 2, on which the light-emitting diodes 31, 32 are arranged, has approximately the shape of a sickle or banana.
  • the carrier 2 has a base 23 for mounting the light-emitting diode module 1 in a headlight 5.
  • the base 23 also comprises the electrical contacting of the light-emitting diodes 31, 32 and may additionally comprise, for example, a heat sink formed as a metal disk provided with cooling ribs in order to remove the heat sinks
  • Light emitting diodes 31, 32 generated heat on the material of the carrier 2 and the base 23 dissipate.
  • the light-emitting diode module 1 has a width of 40 mm and a height of 80 mm.
  • the equipped with the light emitting diodes 31, 32 head of the carrier 2 is arranged at a distance of 10 mm in front of the apex of the reflector 4.
  • Each of the twenty light-emitting diodes 31, 32 has a luminous flux of 10 lm, so that the total luminous flux of the light-emitting diode module is 200 lm.
  • the light intensity of the light-emitting diode module 1 can be significantly improved.
  • FIG. 4 is schematically illustrated a vehicle headlight 5 according to an embodiment of the invention, which is equipped with three juxtaposed light-emitting diode modules 1, 11, 111.
  • All light-emitting diode modules 1, 11, 111 have the above-described and in the FIGS. 1 to 3 schematically illustrated construction. They differ essentially only by the shape of the light-reflecting surfaces of their reflectors.
  • the distance between the head of the carrier equipped with the light-emitting diodes and the apex of the reflector is in addition 25 mm instead of the 10 mm described above.
  • the vehicle headlight 5 has a light-transmitting front cover 51, which may be formed as an optical lens.
  • the vehicle headlight 5 generates a luminous flux of 600 lm.
  • the luminous flux can be improved to values of 1200 lm or more.
  • FIGS. 5 to 8 the light distributions generated by the light-emitting diode modules 1, 11, 111 are shown schematically. These figures show the projection of the light emitted by the light-emitting diode modules 1, 11 or 111 onto a vertically arranged screen.
  • the first light-emitting diode module 1 generates a light distribution which is fanned out broadly along the cut-off line of the low beam, largely mirror-symmetrical with respect to the vertical plane 0.
  • the brightness maximum is located in a narrow strip along the horizontal cut-off line.
  • the second light-emitting diode module 11 generates a focused to a point, also largely mirror-symmetrical with respect to the vertical plane 0 light distribution.
  • the third light-emitting diode module 111 serves to generate an asymmetrical light distribution, in particular for producing the asymmetrical finger of the low-beam light distribution. It is needed to illuminate the side of the road facing away from oncoming traffic.
  • the brightness maximum of the asymmetrical light distribution extends along a narrow strip which forms an angle of approximately 15 degrees with the horizontal. In the FIGS. 8 and 9 is the entire, generated by the vehicle headlight 5 light distribution shown.
  • any other light distributions for example for the fog light, high beam, parking light or daytime running light can be generated. It is also possible to generate the aforementioned light distributions by means of only one of the light-emitting diode module according to the invention in the vehicle headlamp, if a sufficiently high number of light-emitting diodes is mounted on the carrier of the light-emitting diode module and / or light emitting diodes with a sufficiently high luminous flux on the carrier the light-emitting diode module are arranged and the reflector shape is adapted according to the desired light distribution.

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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)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

The light-emitting diode module (1) has a reflector (4) and a carrier (2) for the light-emitting diodes (31), which are mounted on at least one surface region (21,22) of the carrier, arranged in one or more curved rows, each of which corresponds to a cone section. The surface region of the carrier provided with the light-emitting diodes is angled so that it faces the reflective surface (41) of the reflector. An independent claim for an automobile head lamp is also included.

Description

Die Erfindung betrifft ein Leuchtdioden-Modul für einen Fahrzeugscheinwerfer gemäß dem Oberbegriff des Patentanspruchs 1 und einen Fahrzeugscheinwerfer.The invention relates to a light-emitting diode module for a vehicle headlight according to the preamble of patent claim 1 and a vehicle headlight.

I. Stand der Technik I. State of the art

Die Offenlegungsschrift WO 01/01037 A1 offenbart einen Fahrzeugscheinwerfer mit einer Vielzahl von als Lichtquelle dienenden Leuchtdioden. Das von den Leuchtdioden emittierte Lichtbündel besitzt mindestens zwei Segmente mit Licht aus unterschiedlichen spektralen Bereichen. Ein erstes Segment des Lichtbündels weist einen hohen Anteil an weißem oder gelb-orangem Licht und ein zweites Segment weist einen hohen Anteil an blau-grünem Licht auf.The publication WO 01/01037 A1 discloses a vehicle headlamp having a plurality of light emitting diodes serving as a light source. The light beam emitted by the light-emitting diodes has at least two segments with light from different spectral regions. A first segment of the light beam has a high proportion of white or yellow-orange light and a second segment has a high proportion of blue-green light.

Die Offenlegungsschrift EP 1 298 382 A1 beschreibt ein Leuchtdioden-Modul für eine Fahrzeugleuchte mit einem Reflektor und einem Träger für Leuchtdioden, wobei der Träger eine ebene Oberfläche besitzt, auf dem die Leuchtdioden angeordnet sind.The publication EP 1 298 382 A1 describes a light emitting diode module for a vehicle lamp with a reflector and a support for light emitting diodes, wherein the carrier has a flat surface on which the light emitting diodes are arranged.

Die Offenlegungsschrift EP 1 298 383 A2 offenbart eine auswechselbare LED-Lampe für Fahrzeuge mit LED-Chips, die unmittelbar auf der Oberfläche einer Lampenkapsel angeordnet sind.The publication EP 1 298 383 A2 discloses a replaceable LED lamp for vehicles with LED chips, which are arranged directly on the surface of a lamp capsule.

Die Offenlegungsschrift EP 1 270 325 A2 beschreibt einen Scheinwerfer für Fahrzeuge mit einer Lichtquelle, die eine Mehrzahl von auf einem gemeinsamen, gewölbten Träger angeordneten lichtemittierenden Dioden aufweist.The publication EP 1 270 325 A2 describes a headlamp for vehicles with a light source having a plurality of arranged on a common, curved support light-emitting diodes.

Die Offenlegungsschrift EP 1 298 382 A1 offenbart eine LED-Lampe für Fahrzeuge mit einer auswechselbaren Linsenoptik.The publication EP 1 298 382 A1 discloses an LED lamp for vehicles with interchangeable lens optics.

Die Offenlegungsschrift WO 01/01038 A1 beschreibt einen Fahrzeugscheinwerfer mit einer Lichtquelle, die eine Vielzahl von LEDs umfasst.The publication WO 01/01038 A1 describes a vehicle headlamp with a light source comprising a plurality of LEDs.

II. Darstellung der Erfindung II. Presentation of the invention

Es ist die Aufgabe der Erfindung, ein Leuchtdioden-Modul für einen Fahrzeugscheinwerfer bereitzustellen, das zur Erzeugung diverser, für einen Fahrzeugscheinwerfer typischer Lichtverteilungen geeignet ist. Außerdem ist es die Aufgabe der Erfindung, einen Fahrzeugscheinwerfer bereitzustellen, der die Erzeugung der typischen Lichtverteilungen eines Fahrzeugscheinwerfers allein mittels Leuchtdioden als Lichtquellen ermöglicht.It is the object of the invention to provide a light-emitting diode module for a vehicle headlight, which is suitable for generating diverse, for a vehicle headlight typical light distributions. In addition, it is the object of the invention to provide a vehicle headlight, which enables the generation of the typical light distributions of a vehicle headlight solely by means of light-emitting diodes as light sources.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst. Besonders vorteilhafte Ausführungen der Erfindung sind in den abhängigen Patentansprüchen beschrieben.This object is achieved by the features of claim 1. Particularly advantageous embodiments of the invention are described in the dependent claims.

Das erfindungsgemäße Leuchtdioden-Modul für einen Fahrzeugscheinwerfer weist einen Reflektor und einen Träger für Leuchtdioden auf, wobei der Träger mindestens einen Oberflächenbereich besitzt, auf dem erfindungsgemäß mehrere Leuchtdioden entlang mindestens einer gekrümmten Linie angeordnet sind. Durch das erfindungsgemäße Leuchtdioden-Modul wird eine optimale Anpassung der Form der räumlich ausgedehnten Lichtquelle, die hier aus einer Vielzahl von Leuchtdioden besteht, an den Reflektor ermöglicht. Es hat sich gezeigt, dass mittels des erfindungsgemäßen Leuchtdioden-Moduls unterschiedliche Lichtverteilungen für einen Fahrzeugscheinwerfer realisiert werden können. Beispielsweise können mit Hilfe der erfindungsgemäßen Leuchtdioden-Module in einem Fahrzeugscheinwerfer die Lichtverteilungen für Nebellicht, Abblendlicht, Fernlicht, Standlicht oder Tagfahrlicht erzeugt werden. Zur Erzeugung der vergleichsweise komplexen, asymmetrischen Lichtverteilung des Abblendlichts werden zum Beispiel nur drei der erfindungsgemäßen Leuchtdioden-Module in einem Fahrzeugscheinwerfer benötigt.The light-emitting diode module according to the invention for a vehicle headlight has a reflector and a support for light-emitting diodes, wherein the support has at least one surface area on which several light-emitting diodes are arranged according to the invention along at least one curved line. By the light-emitting diode module according to the invention an optimal adaptation of the shape of the spatially extended light source, which consists of a plurality of light-emitting diodes, allows the reflector. It has been shown that different light distributions for a vehicle headlight can be realized by means of the light-emitting diode module according to the invention. For example, with the aid of the light-emitting diode modules according to the invention in a vehicle headlight, the light distributions for fog light, low beam, high beam, parking light or daytime running light can be generated. To generate the comparatively complex, asymmetrical light distribution of the low beam, for example, only three of the light-emitting diode modules according to the invention are required in a vehicle headlight.

Die mindestens eine gekrümmte Linie, entlang der die Leuchtdioden angeordnet sind, entspricht vorteilhaft einem Abschnitt eines Kegelschnitts, vorzugsweise einer Ellipse, um eine optimale Anpassung an einen Freiformflächen-Reflektor zu ermöglichen. Der mindestens eine Oberflächenbereich des Trägers, auf dem die Leuchtdioden montiert sind, besitzt eine quer zur optischen Achse des Reflektors orientierte Längserstreckung, so dass die mindestens eine gekrümmte Linie, entlang der die Leuchtdioden angeordnet sind, sich im wesentlichen quer zur optischen Achse des Reflektors erstreckt. Der vorgenannte mindestens eine Oberflächenbereich ist vorzugsweise gegenüber der optischen Achse des Reflektors geneigt, so dass er einer lichtreflektierenden Fläche des Reflektors zugewandt ist, damit ein möglichst großer Anteil des von den Leuchtdioden emittierten Lichts auf den Reflektor trifft. Der mindestens eine Oberflächenbereich ist gewölbt ausgebildet. Die Krümmung der mindestens einen Linie, entlang der die Leuchtdioden angeordnet sind, ist vorzugsweise durch die Wölbung des mindestens einen Oberflächenbereiches bestimmt.The at least one curved line, along which the light-emitting diodes are arranged, advantageously corresponds to a section of a conic section, preferably an ellipse, in order to allow optimum adaptation to a free-form surface reflector. The at least one surface region of the carrier on which the light-emitting diodes are mounted, has a transverse to the optical axis of the reflector oriented longitudinal extent, so that the at least one curved line along which the light-emitting diodes are arranged extends substantially transverse to the optical axis of the reflector. The aforementioned at least one surface region is preferably inclined with respect to the optical axis of the reflector, so that it faces a light-reflecting surface of the reflector, so that the largest possible proportion of the light emitted by the LEDs hits the reflector. The at least one surface area is arched. The curvature of the at least one line, along which the light-emitting diodes are arranged, is preferably determined by the curvature of the at least one surface region.

Der mindestens eine Oberflächenbereich besitzt eine quer zur optischen Achse des Reflektors orientierte Längserstreckung, ist in Richtung seiner Längserstreckung gewölbt ausgebildet und vorzugsweise gegenüber der optischen Achse geneigt, so dass er einer lichtreflektierenden Fläche des Reflektors zugewandt ist. Die gewölbte Ausbildung des vorgenannten Oberflächenbereichs ist so zu verstehen, dass dieser gewölbte Oberflächenbereich auch facettiert ausgebildet sein kann, das heißt, aus einer Vielzahl von ebenen Facetten bestehen kann, um zu gewährleisten, dass für die Montage der Leuchtdioden jeweils eine ebene Teilfläche verfügbar ist. Jede Leuchtdiode kann beispielsweise auf einer Facette fixiert sein, wobei die Größe der Facette auf die Maße der darauf fixierten Leuchtdiode abgestimmt ist. Die Wölbung des vorgenannten mindestens einen Oberflächenbereiches entspricht einem Kegelschnitt und ist vorzugsweise elliptisch ausgebildet. Die auf diesem Oberflächenbereich montierten Leuchtdioden sind vorteilhaft entlang einer Linie angeordnet, die einem Kegelschnitt und vorzugsweise dem Abschnitt einer Ellipse entspricht. Die dadurch erzielte kegelschnittförmige und vorzugsweise elliptische Kontur der Lichtquelle lässt sich vorteilhaft mit einem Freiformflächen-Reflektor kombinieren, um die für Fahrzeugscheinwerfer typischen Lichtverteilungen zu generieren.The at least one surface region has a longitudinal extent oriented transversely to the optical axis of the reflector, is arched in the direction of its longitudinal extension and is preferably inclined with respect to the optical axis, so that it faces a light-reflecting surface of the reflector. The curved formation of the aforementioned surface area is to be understood such that this curved surface area can also be embodied facetted, that is, can consist of a multiplicity of planar facets, in order to ensure that a planar partial area is available for the assembly of the light-emitting diodes. Each light-emitting diode can be fixed, for example, on a facet, wherein the size of the facet is matched to the dimensions of the light-emitting diode fixed thereon. The curvature of the aforementioned at least one surface area corresponds to a conic and is preferably elliptical. The light-emitting diodes mounted on this surface area are advantageously arranged along a line which corresponds to a conic section and preferably to the section of an ellipse. The cone-shaped and preferably elliptical contour of the light source achieved in this way can advantageously be combined with a free-form surface reflector in order to generate the light distributions typical of vehicle headlamps.

Gemäß dem bevorzugten Ausführungsbeispiel der Erfindung besitzt der Träger des Leuchtdioden-Moduls zwei Oberflächenbereiche, auf denen jeweils mehrere Leuchtdioden angeordnet sind, wobei ein erster Oberflächenbereich konkav und der zweite Oberflächenbereich konvex gewölbt ist, und wobei der konkav gewölbte erste Oberflächenbereich einer ersten lichtreflektierenden Fläche des Reflektors zugewandt ist und der konvex gewölbte zweite Oberflächenbereich einer zweiten lichtreflektierenden Fläche des Reflektors zugewandt ist. Die auf den beiden unterschiedlich gewölbten Oberflächen angeordneten Dioden lassen sich optimal mit einem aus zwei Hälften bestehenden Freiformflächen-Reflektor kombinieren. Insbesondere kann durch diese Diodenanordnung eine scharfe Hell-Dunkel-Grenze für die typischen Lichtverteilung des Fahrzeugscheinwerfers, insbesondere für die des Abblendlichts erzeugt werden. Außerdem werden durch die zweite, mit Leuchtdioden bestückte Oberfläche des Trägers und durch die zweite lichtreflektierende Fläche des Reflektors der Lichtstrom und die Lichtstärke des Leuchtdioden-Moduls erhöht.According to the preferred embodiment of the invention, the support of the light-emitting diode module has two surface regions, on each of which a plurality of light-emitting diodes are arranged, wherein a first surface area is concave and the second surface area is convex, and wherein the concavely curved first surface area of a first light-reflecting surface of the reflector facing and the convexly curved second surface region faces a second light-reflecting surface of the reflector. The diodes arranged on the two differently curved surfaces can be optimally combined with a freeform surface reflector consisting of two halves. In particular, this diode arrangement can produce a sharp cut-off line for the typical light distribution of the vehicle headlight, in particular for that of the low beam become. In addition, the luminous flux and the luminous intensity of the light-emitting diode module are increased by the second, equipped with LEDs surface of the carrier and by the second light-reflecting surface of the reflector.

Der erfindungsgemäße Fahrzeugscheinwerfer umfasst mindestens ein Leuchtdioden-Modul, das einen Reflektor und einen Träger für Leuchtdioden besitzt, wobei der Träger mindestens einen Oberflächenbereich aufweist, auf dem mehrere Leuchtdioden erfindungsgemäß entlang mindestens einer gekrümmten Linie angeordnet sind. Das mindestens eine, in dem erfindungsgemäßen Fahrzeugscheinwerfer angeordnete Leuchtdioden-Modul besitzt die bereits oben erläuterten vorteilhaften Merkmale.The vehicle headlight according to the invention comprises at least one light-emitting diode module which has a reflector and a support for light-emitting diodes, wherein the support has at least one surface area on which a plurality of light-emitting diodes are arranged according to the invention along at least one curved line. The at least one light-emitting diode module arranged in the vehicle headlight according to the invention has the advantageous features already explained above.

Mit Hilfe des erfindungsgemäßen Fahrzeugscheinwerfers, der als Lichtquellen ausschließlich Leuchtdioden enthält, können die gleichen Lichtverteilungen wie mit den konventionellen Fahrzeugscheinwerfern, die mit Glühlampen oder Entladungslampen bestückt sind, erzeugt werden. Insbesondere kann mit einem erfindungsgemäßen Fahrzeugscheinwerfer, der nur ein Leuchtdioden-Modul enthält, beispielsweise das Standlicht generiert werden. Die Lichtverteilungen des Nebellichts, Tagfahrlichts oder Fernlichts können beispielsweise mit einem erfindungsgemäßen Fahrzeugescheinwerfer erzeugt werden, der zwei nebeneinander angeordnete erfindungsgemäβe Leuchtdioden-Module enthält. Falls ein höherer Lichtstrom oder eine höhere Lichtstärke erforderlich ist, können aber auch mehr als zwei erfindungsgemäße Leuchtdioden-Module in dem Fahrzeugscheinwerfer montiert werden. Zur Erzeugung der asymmetrischen Lichtverteilung des Abblendlichts enthält der Fahrzeugscheinwerfer vorzugsweise mindestens drei erfindungsgemäße Leuchtdioden-Module. Mit Hilfe des ersten Leuchtdioden-Moduls wird vorzugsweise eine erste, weit aufgefächerte Lichtverteilung erzeugt, deren Lichtstärkemaximum einen schmalen Streifen entlang der Hell-Dunkel-Grenze der Lichtverteilung bildet. Mittels des zweiten Leuchtdioden-Moduls wird vorzugsweise eine zweite, auf einen Punkt ausgerichtete Lichtverteilung erzeugt, deren Lichtstärkemaximum in dem zentralen Punkt an der Hell-Dunkel-Grenze der Lichtverteilung lokalisiert ist. Die Ausleuchtung des vom Gegenverkehr abgewandten Fahrbahnrandes wird vorzugsweise mittels eines dritten Leuchtdioden-Moduls im Fahrzeugscheinwerfer gewährleistet, das zur Erzeugung einer asymmetrischen Lichtverteilung, des sogenannten 15 Gradasymmetrischen Fingers der Abblendlichtverteilung dient. Die Lichtverteilungen der drei Module des Fahrzeugscheinwerfers werden überlagert und ergeben zusammen die Abblendlichtverteilung. Falls ein höherer Lichtstrom oder eine höhere Lichtstärke gewünscht werden, können im Fahrzeugscheinwerfer auch mehr als drei erfindungsgemäße Leuchtdioden-Module angeordnet werden.With the help of the vehicle headlamp according to the invention, which contains only light-emitting diodes as light sources, the same light distributions as with the conventional vehicle headlights, which are equipped with incandescent lamps or discharge lamps, can be generated. In particular, with a vehicle headlight according to the invention, which contains only one light-emitting diode module, for example, the parking light can be generated. The light distributions of the fog light, daytime running light or high beam can be generated, for example, with a vehicle headlamp according to the invention, which contains two juxtaposed erfindungsgemäεe light-emitting diode modules. If a higher luminous flux or a higher light intensity is required, but also more than two light-emitting diode modules according to the invention can be mounted in the vehicle headlight. To generate the asymmetrical light distribution of the low beam, the vehicle headlight preferably contains at least three light-emitting diode modules according to the invention. With the aid of the first light-emitting diode module, a first, widely fanned out light distribution is preferably generated whose light intensity maximum forms a narrow strip along the light-dark boundary of the light distribution. By means of the second light-emitting diode module, a second light distribution directed at a point is preferably generated, the light intensity maximum of which is located at the central point at the light-dark boundary of the light distribution. The illumination of the roadside facing away from oncoming traffic is preferably ensured by means of a third light-emitting diode module in the vehicle headlight, the Generation of an asymmetric light distribution, the so-called 15 degree asymmetric finger of the low-beam light distribution is used. The light distributions of the three modules of the vehicle headlamp are superimposed and together result in the low beam distribution. If a higher luminous flux or a higher light intensity is desired, more than three light-emitting diode modules according to the invention can also be arranged in the vehicle headlight.

III. Beschreibung des bevorzugtenAusführungsbeispiels III. Description of the Preferred Embodiment

Nachstehend wird die Erfindung anhand eines bevorzugten Ausführungsbeispiels näher erläutert. Es zeigen:

Figur 1
Eine Vorderansicht eines Leuchtdioden-Modul gemäß eines bevorzugten Ausführungsbeispiels der Erfindung in schematischer Darstellung
Figur 2
Eine Draufsicht auf das in Figur 1 abgebildete Leuchtdioden-Modul in teilweise geschnittener Darstellung
Figur 3
Eine Seitenansicht des in Figur 1 abgebildeten Leuchtdioden-Moduls
Figur 4
Eine Draufsicht auf einen Fahrzeugscheinwerfer gemäß eines bevorzugten Ausführungsbeispiels der Erfindung in schematischer Darstellung
Figur 5
Die Lichtverteilung des ersten Leuchtdioden-Moduls des Fahrzeug- scheinwerfers aus Figur 4
Figur 6
Die Lichtverteilung des zweiten Leuchtdioden-Moduls des Fahrzeug- scheinwerfers aus Figur 4
Figur 7
Die Lichtverteilung des dritten Leuchtdioden-Moduls des Fahrzeug- scheinwerfers aus Figur 4
Figur 8
Die gesamte Abblendlichtverteilung des in Figur 4 abgebildeten Fahrzeug- scheinwerfers
Figur 9
Die gesamte Abblendlichtverteilung des in Figur 4 abgebildeten Fahrzeug- scheinwerfers aus der Vogelperspektive
The invention will be explained in more detail below with reference to a preferred embodiment. Show it:
FIG. 1
A front view of a light-emitting diode module according to a preferred embodiment of the invention in a schematic representation
FIG. 2
A top view of the in FIG. 1 Pictured light-emitting diode module in a partially sectioned illustration
FIG. 3
A side view of the in FIG. 1 pictured light-emitting diode module
FIG. 4
A plan view of a vehicle headlamp according to a preferred embodiment of the invention in a schematic representation
FIG. 5
The light distribution of the first light-emitting diode module of the vehicle headlight off FIG. 4
FIG. 6
The light distribution of the second light-emitting diode module of the vehicle headlight off FIG. 4
FIG. 7
The light distribution of the third light-emitting diode module of the vehicle headlamp FIG. 4
FIG. 8
The entire low-beam distribution of the in FIG. 4 illustrated vehicle headlights
FIG. 9
The entire low-beam distribution of the in FIG. 4 illustrated vehicle headlamps from a bird's eye view

In den Figuren 1 bis 3 ist schematisch ein Ausführungsbeispiel des erfindungsgemäβen Leuchtdioden-Moduls abgebildet. Das Leuchtdioden-Modul 1 besitzt einen Träger 2 für insgesamt zwanzig lichtemittierende Dioden, vorzugsweise Leuchtdioden 31, 32, die während des Betriebes weißes Licht erzeugen, und einen Freiformflächen-Reflektor 4, der zwei lichtreflektierende Flächen 41, 42 aufweist. Anstelle von Leuchtdioden können aber auch Laserdioden verwendet werden. Der Träger 2 besteht aus einem Material hoher Wärmeleitfähigkeit, beispielsweise aus einem Metall oder Kunststoff, um die von den Leuchtdioden 31, 32 generierte Wärme abzuführen. Der Träger 2 weist eine erste, konkav gewölbte Oberfläche 21 auf, die der ersten lichtreflektierenden Fläche 41 des Reflektors 4 zugewandt ist und auf der zehn Leuchtdioden 31 in einer Reihe nebeneinander angeordnet. Die konkave Wölbung der Oberfläche 21 des Trägers 2 erstreckt quer zur optischen Achse A-A des Reflektors 4. Zusätzlich weist der Träger 2 eine zweite, konvex gewölbte Oberfläche 22 auf, die der zweiten lichtreflektierenden Fläche 42 des Reflektors 4 zugewandt ist und auf der ebenfalls zehn Leuchtdioden 32 in einer Reihe nebeneinander angeordnet sind. Die gewölbten Oberflächen 21, 22 sind gegenüber der optischen Achse A-A des Reflektors 4 in Richtung der lichtreflektierenden Flächen 41 bzw. 42 geneigt, so dass das von den Leuchtdioden 31 bzw. 32 emittierte Licht auf die erste 41 bzw. zweite lichtreflektierende Fläche 42 des Reflektors 4 auftrifft. Die Wölbung beider Oberflächen 21, 22 ist elliptisch. Dadurch sind die Leuchtdioden 31 bzw. 32 jeweils entlang eines Ellipsenabschnitts angeordnet. Die Oberflächen 21, 22 können facettiert ausgebildet sein, damit jede Leuchtdiode 31, 32 auf einem ebenen Flächenabschnitt angeordnet ist. In den Figuren 1 und 3 ist die Form des Trägers 2 und der Oberflächen 21, 22 veranschaulicht. Der Kopf des Trägers 2, auf dem die Leuchtdioden 31, 32 angeordnet sind, besitzt annähernd die Form einer Sichel oder Banane. Der Träger 2 weist einen Sockel 23 zur Montage des Leuchtdioden-Moduls 1 in einem Scheinwerfer 5 auf. Der Sockel 23 umfasst auch die elektrische Kontaktierung der Leuchtdioden 31, 32 und kann zusätzlich beispielsweise eine als mit Kühlrippen versehene Metallscheibe ausgebildete Wärmesenke aufweisen, um die von den Leuchtdioden 31, 32 generierte Wärme über das Material des Trägers 2 und den Sockel 23 abzuführen. Das Leuchtdioden-Modul 1 hat eine Breite von 40 mm und eine Höhe von 80 mm. Der mit den Leuchtdioden 31, 32 bestückte Kopf des Trägers 2 ist im Abstand von 10 mm vor dem Scheitel des Reflektors 4 angeordnet. Jede der zwanzig Leuchtdioden 31, 32 besitzt einen Lichtstrom von 10 lm, so dass der gesamte Lichtstrom des Leuchtdioden-Moduls 200 lm beträgt. Bei Verwendung leistungsfähigerer Leuchtdioden oder durch Montage einer zweiten Reihe von Leuchtdioden auf den Oberflächen 21, 22 kann die Lichtstärke des Leuchtdioden-Moduls 1 noch erheblich verbessert werden.In the FIGS. 1 to 3 is schematically illustrated an embodiment of the erfindungsgemäβen light-emitting diode module. The light-emitting diode module 1 has a support 2 for a total of twenty light-emitting diodes, preferably light-emitting diodes 31, 32, which generate white light during operation, and a free-form surface reflector 4, which has two light-reflecting surfaces 41, 42. Instead of LEDs but also laser diodes can be used. The carrier 2 consists of a material of high thermal conductivity, for example of a metal or plastic, to dissipate the heat generated by the LEDs 31, 32. The carrier 2 has a first, concavely curved surface 21, which faces the first light-reflecting surface 41 of the reflector 4 and arranged on the ten light-emitting diodes 31 in a row next to one another. The concave curvature of the surface 21 of the support 2 extends transversely to the optical axis AA of the reflector 4. In addition, the support 2 has a second, convexly curved surface 22, which faces the second light-reflecting surface 42 of the reflector 4 and on the also ten light-emitting diodes 32 are arranged in a row next to each other. The curved surfaces 21, 22 are inclined relative to the optical axis AA of the reflector 4 in the direction of the light-reflecting surfaces 41 and 42, so that the light emitted by the light-emitting diodes 31 and 32, respectively, on the first 41 and second light-reflecting surface 42 of the reflector 4 hits. The curvature of both surfaces 21, 22 is elliptical. As a result, the light-emitting diodes 31 and 32 are each arranged along an ellipse section. The surfaces 21, 22 may be faceted, so that each light-emitting diode 31, 32 is arranged on a flat surface portion. In the FIGS. 1 and 3 the shape of the carrier 2 and the surfaces 21, 22 is illustrated. The head of the carrier 2, on which the light-emitting diodes 31, 32 are arranged, has approximately the shape of a sickle or banana. The carrier 2 has a base 23 for mounting the light-emitting diode module 1 in a headlight 5. The base 23 also comprises the electrical contacting of the light-emitting diodes 31, 32 and may additionally comprise, for example, a heat sink formed as a metal disk provided with cooling ribs in order to remove the heat sinks Light emitting diodes 31, 32 generated heat on the material of the carrier 2 and the base 23 dissipate. The light-emitting diode module 1 has a width of 40 mm and a height of 80 mm. The equipped with the light emitting diodes 31, 32 head of the carrier 2 is arranged at a distance of 10 mm in front of the apex of the reflector 4. Each of the twenty light-emitting diodes 31, 32 has a luminous flux of 10 lm, so that the total luminous flux of the light-emitting diode module is 200 lm. When using more powerful light-emitting diodes or by mounting a second row of light-emitting diodes on the surfaces 21, 22, the light intensity of the light-emitting diode module 1 can be significantly improved.

In der Figur 4 ist schematisch ein Fahrzeugscheinwerfer 5 gemäß eines Ausführungsbeispiels der Erfindung abgebildet, der mit drei nebeneinander angeordneten Leuchtdioden-Modulen 1, 11, 111 ausgestattet ist. Alle Leuchtdioden-Module 1, 11, 111 besitzen den oben beschriebenen und in den Figuren 1 bis 3 schematisch dargestellten Aufbau. Sie unterscheiden sich im wesentlichen nur durch die Form der lichtreflektierenden Flächen ihrer Reflektoren. Bei dem Modul 111 beträgt zusätzlich der Abstand des mit den Leuchtdioden bestückten Kopfes des Trägers zu dem Scheitel des Reflektors 25 mm anstatt der oben beschriebenen 10 mm. In Figur 4 ist dieser Sachverhalt schematisch dargestellt. Der Fahrzeugscheinwerfer 5 weist eine lichtdurchlässige Frontabdeckung 51 auf, die als optische Linse ausgebildet sein kann. Er dient zur Erzeugung des Abblendlichts eines Kraftfahrzeugs. Der Fahrzeugscheinwerfer 5 erzeugt einen Lichtstrom von 600 lm. Durch Verdoppelung der Anzahl der Leuchtdioden oder der Anzahl der Leuchtdioden-Module oder aber durch Verwendung leistungsfähigerer Leuchtdioden kann der Lichtstrom auf Werte von 1200 lm oder mehr verbessert werden.In the FIG. 4 is schematically illustrated a vehicle headlight 5 according to an embodiment of the invention, which is equipped with three juxtaposed light-emitting diode modules 1, 11, 111. All light-emitting diode modules 1, 11, 111 have the above-described and in the FIGS. 1 to 3 schematically illustrated construction. They differ essentially only by the shape of the light-reflecting surfaces of their reflectors. In the case of the module 111, the distance between the head of the carrier equipped with the light-emitting diodes and the apex of the reflector is in addition 25 mm instead of the 10 mm described above. In FIG. 4 This situation is shown schematically. The vehicle headlight 5 has a light-transmitting front cover 51, which may be formed as an optical lens. It is used to generate the low beam of a motor vehicle. The vehicle headlight 5 generates a luminous flux of 600 lm. By doubling the number of light-emitting diodes or the number of light-emitting diode modules or by using more powerful light-emitting diodes, the luminous flux can be improved to values of 1200 lm or more.

In den Figuren 5 bis 8 sind die von den Leuchtdioden-Modulen 1, 11, 111 generierten Lichtverteilungen schematisch dargestellt. Diese Figuren zeigen die Projektion des von den Leuchtdioden-Modulen 1, 11 bzw. 111 emittierten Lichts auf einen vertikal angeordneten Schirm. Das erste Leuchtdioden-Modul 1 erzeugt eine breit entlang der Hell-Dunkel-Grenze des Abblendlichts aufgefächerte, weitgehend bezüglich der vertikalen Ebene 0 spiegelsymmetrische Lichtverteilung. Das Helligkeitsmaximum ist in einem schmalen Streifen entlang der horizontal verlaufenden Hell-Dunkel-Grenze lokalisiert. Das zweite Leuchtdioden-Modul 11 generiert eine auf einen Punkt gebündelte, ebenfalls weitgehend bezüglich der vertikalen Ebene 0 spiegelsymmetrische Lichtverteilung. Ihr Helligkeitsmaximum ist an der Hell-Dunkel-Grenze, im Zentrum lokalisiert. Das dritte Leuchtdioden-Modul 111 dient zur Erzeugung einer asymmetrischen Lichtverteilung, insbesondere zur Erzeugung des asymmetrischen Fingers der Abblendlichtverteilung. Er wird zur Ausleuchtung des von dem Gegenverkehr abgewandten Fahrbahnrandes benötigt. Das Helligkeitsmaximum der asymmetrischen Lichtverteilung erstreckt sich entlang eines schmalen Streifens, der einen Winkel von ca. 15 Grad mit der Horizontalen bildet. In den Figuren 8 und 9 ist die gesamte, von dem Fahrzeugscheinwerfer 5 generierte Lichtverteilung abgebildet.In the FIGS. 5 to 8 the light distributions generated by the light-emitting diode modules 1, 11, 111 are shown schematically. These figures show the projection of the light emitted by the light-emitting diode modules 1, 11 or 111 onto a vertically arranged screen. The first light-emitting diode module 1 generates a light distribution which is fanned out broadly along the cut-off line of the low beam, largely mirror-symmetrical with respect to the vertical plane 0. The brightness maximum is located in a narrow strip along the horizontal cut-off line. The second light-emitting diode module 11 generates a focused to a point, also largely mirror-symmetrical with respect to the vertical plane 0 light distribution. Their brightness maximum is located at the light-dark border, in the center. The third light-emitting diode module 111 serves to generate an asymmetrical light distribution, in particular for producing the asymmetrical finger of the low-beam light distribution. It is needed to illuminate the side of the road facing away from oncoming traffic. The brightness maximum of the asymmetrical light distribution extends along a narrow strip which forms an angle of approximately 15 degrees with the horizontal. In the FIGS. 8 and 9 is the entire, generated by the vehicle headlight 5 light distribution shown.

Die Erfindung beschränkt sich nicht auf das oben näher erläuterte Ausführungsbeispiel. Durch geeignete Kombination mehrerer der erfindungsgemäßen Leuchtdioden-Module und entsprechende Anpassung der Reflektorform können auch beliebige andere Lichtverteilungen, beispielsweise für das Nebellicht, Fernlicht, Standlicht oder Tagfahrlicht erzeugt werden. Es ist auch möglich, mittels nur eines der erfindungsgemäßen Leuchtdioden-Moduls in dem Fahrzeugscheinwerfer die vorgenannten Lichtverteilungen zu generieren, wenn eine ausreichend hohe Anzahl von Leuchtdioden auf dem Träger des Leuchtdioden-Moduls montiert ist und/oder Leuchtdioden mit einem ausreichend hohen Lichtstrom auf dem Träger des LeuchtDioden-Moduls angeordnet sind und die Reflektorform entsprechend der gewünschten Lichtverteilung angepasst ist.The invention is not limited to the embodiment explained in more detail above. By suitable combination of several of the light-emitting diode modules according to the invention and corresponding adaptation of the reflector shape, any other light distributions, for example for the fog light, high beam, parking light or daytime running light can be generated. It is also possible to generate the aforementioned light distributions by means of only one of the light-emitting diode module according to the invention in the vehicle headlamp, if a sufficiently high number of light-emitting diodes is mounted on the carrier of the light-emitting diode module and / or light emitting diodes with a sufficiently high luminous flux on the carrier the light-emitting diode module are arranged and the reflector shape is adapted according to the desired light distribution.

Claims (5)

  1. Light-emitting diode module for a vehicle headlamp, the light-emitting diode module (1) having a reflector (4) and a carrier (2) for light-emitting diodes, and the carrier (2) having at least one surface region (21) on which a number of light-emitting diodes (31) are arranged, the light-emitting diodes (31) being arranged along at least one curved line on the at least one surface region (21), and the at least one surface region (21) having a longitudinal extent oriented transverse to the optical axis (A-A) of the reflector (4) and being of cambered design in the direction of its longitudinal extent, the camber of the at least one surface region (21) corresponding to the camber of a conic section, and the curvature of the at least one line along which the light-emitting diodes (31) are arranged being determined by the camber of the at least one surface region (21),
    characterized in that the at least one surface region (21) is inclined to the optical axis (A-A) such that it faces a light-reflecting face (41) of the reflector (4).
  2. Light-emitting diode module according to Claim 1, characterized in that the carrier (2) has two surface regions (21, 22) on which in each case a number of light-emitting diodes (31, 32) are arranged, a first surface region (21) being concavely cambered, and the second surface region (22) being convexly cambered, and the concavely cambered first surface region (21) facing a first light-reflecting face (41) of the reflector (4), and the convexly cambered second surface region (22) facing a second light-reflecting face (42) of the reflector (4).
  3. Vehicle headlamp (5) having at least one light-emitting diode module (1) according to one or more of Claims 1 to 2.
  4. Vehicle headlamp according to Claim 3, which has at least three light-emitting diode modules (1, 11, 111) that cooperate to produce the light distribution of the dimmed headlight.
  5. Vehicle headlamp according to Claim 4, in which the first light-emitting diode module (1) serves for producing a first, widespread light distribution, the second light-emitting diode module (11) serves for producing a second light distribution, focused onto a point, and the third light-emitting diode module (111) serves for producing a third, asymmetric light distribution.
EP04013156A 2003-07-24 2004-06-03 LED module for a vehicular headlight and vehicular headlight comprising the same Expired - Lifetime EP1500867B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10333837 2003-07-24
DE10333837A DE10333837A1 (en) 2003-07-24 2003-07-24 Light-emitting diode module for a vehicle headlight and vehicle headlight

Publications (4)

Publication Number Publication Date
EP1500867A2 EP1500867A2 (en) 2005-01-26
EP1500867A3 EP1500867A3 (en) 2006-09-06
EP1500867B1 true EP1500867B1 (en) 2011-08-24
EP1500867B8 EP1500867B8 (en) 2012-02-15

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EP04013156A Expired - Lifetime EP1500867B8 (en) 2003-07-24 2004-06-03 LED module for a vehicular headlight and vehicular headlight comprising the same

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US (1) US7040792B2 (en)
EP (1) EP1500867B8 (en)
JP (1) JP2005044806A (en)
AT (1) ATE521849T1 (en)
CA (1) CA2475496A1 (en)
DE (1) DE10333837A1 (en)
ES (1) ES2368426T3 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4497073B2 (en) * 2005-10-05 2010-07-07 市光工業株式会社 Vehicle lighting
TWI342444B (en) * 2006-07-04 2011-05-21 Au Optronics Corp Light-emitting unit and backlight module
TW200925513A (en) * 2007-12-11 2009-06-16 Prodisc Technology Inc LED lamp structure for reducing multiple shadows
DE102007063546B4 (en) * 2007-12-21 2013-02-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Headlight module for a vehicle
US20090207610A1 (en) * 2008-02-19 2009-08-20 Edwin Mitchell Sayers Combination rear lighting system
MY162265A (en) * 2008-04-30 2017-05-31 Avialite Sdn Bhd Waterproof led beacon light
DE102008025397A1 (en) * 2008-05-28 2009-12-24 Osram Gesellschaft mit beschränkter Haftung Vehicle lighting device with at least two semiconductor lighting elements
DE102008036193B4 (en) * 2008-08-02 2020-03-12 Automotive Lighting Reutlingen Gmbh Lighting device for a motor vehicle
ES2531275T5 (en) * 2008-09-18 2018-04-20 Koninklijke Philips N.V. Vehicle lighting and headlight unit
US20100246203A1 (en) * 2009-03-27 2010-09-30 North American Lighting, Inc. System and method for exterior lighting of vehicles
FR2946729B1 (en) * 2009-06-10 2011-08-05 Valeo Vision LIGHTING DEVICES, IN PARTICULAR LIGHT-EMITTING DIODES, FOR GENERATING AN ADAPTIVE LUMINOUS BEAM
DE102010012137B4 (en) * 2009-09-08 2024-05-23 Volkswagen Ag Motor vehicle lighting equipment
US10436407B2 (en) 2011-09-27 2019-10-08 Truck-Lite, Co., Llc Modular headlamp assembly for producing a light distribution pattern
US8746939B2 (en) 2011-11-07 2014-06-10 Ford Global Technologies, Llc Crystal off-axis LED headlamp
US9797565B2 (en) 2012-10-31 2017-10-24 Thomas & Betts International Llc LED engine for emergency lighting
DE102012022282B4 (en) * 2012-11-14 2024-04-25 Volkswagen Ag 1 - 13Method and device for calibrating the cut-off line of a total light distribution of at least one light function of a headlight arrangement for a vehicle
US9242581B2 (en) 2014-06-25 2016-01-26 Ford Global Technologies, Llc Automatic presentable swiveling seat
CN108432351B (en) * 2015-12-08 2021-03-19 飞利浦照明控股有限公司 Assembly and lighting device comprising an assembly

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5561346A (en) * 1994-08-10 1996-10-01 Byrne; David J. LED lamp construction
TW498148B (en) 1999-06-25 2002-08-11 Koninkl Philips Electronics Nv Vehicle headlamp and a vehicle
TW493054B (en) * 1999-06-25 2002-07-01 Koninkl Philips Electronics Nv Vehicle headlamp and a vehicle
US6520669B1 (en) * 2000-06-19 2003-02-18 Light Sciences Corporation Flexible substrate mounted solid-state light sources for exterior vehicular lighting
DE10130809A1 (en) * 2001-06-26 2003-01-02 Hella Kg Hueck & Co Headlights for vehicles
US6682211B2 (en) * 2001-09-28 2004-01-27 Osram Sylvania Inc. Replaceable LED lamp capsule
US6637921B2 (en) * 2001-09-28 2003-10-28 Osram Sylvania Inc. Replaceable LED bulb with interchangeable lens optic
US20030103348A1 (en) * 2001-11-30 2003-06-05 Sheng-Tien Hung Projection lamp
US6871993B2 (en) * 2002-07-01 2005-03-29 Accu-Sort Systems, Inc. Integrating LED illumination system for machine vision systems
US6793372B2 (en) * 2002-09-03 2004-09-21 Guide Corporation Multiple reflector indirect light source lamp

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Publication number Publication date
EP1500867B8 (en) 2012-02-15
CA2475496A1 (en) 2005-01-24
DE10333837A1 (en) 2005-03-17
EP1500867A3 (en) 2006-09-06
US20050047169A1 (en) 2005-03-03
US7040792B2 (en) 2006-05-09
ATE521849T1 (en) 2011-09-15
ES2368426T3 (en) 2011-11-17
EP1500867A2 (en) 2005-01-26
JP2005044806A (en) 2005-02-17

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