EP1500867B1 - Module à DEL pour un projecteur de véhicule automobile et projecteur de véhicule automobile comprenant un tel module - Google Patents

Module à DEL pour un projecteur de véhicule automobile et projecteur de véhicule automobile comprenant un tel module 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
Authority
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
Other languages
German (de)
English (en)
Other versions
EP1500867A2 (fr
EP1500867A3 (fr
EP1500867B8 (fr
Inventor
Wilhelm Brandenburg
Oliver Hering
Thomas Reiners
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Osram GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Osram GmbH filed Critical Osram GmbH
Publication of EP1500867A2 publication Critical patent/EP1500867A2/fr
Publication of EP1500867A3 publication Critical patent/EP1500867A3/fr
Publication of EP1500867B1 publication Critical patent/EP1500867B1/fr
Application granted granted Critical
Publication of EP1500867B8 publication Critical patent/EP1500867B8/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)

Claims (5)

  1. Module à diodes électroluminescentes pour un projecteur de véhicule automobile, le module à diodes électroluminescentes (1) possédant un réflecteur (4) et un support (2) pour diodes électroluminescentes et le support (2) présentant au moins une zone de surface (21) sur laquelle sont disposées plusieurs diodes électroluminescentes (31), les diodes électroluminescentes (31) étant disposées le long d'au moins une ligne curviligne sur l'au moins une zone de surface (21), et l'au moins une zone de surface (21) possédant une étendue longitudinale orientée transversalement par rapport à l'axe optique (A-A) du réflecteur (4) et étant réalisée de manière bombée en direction de son étendue longitudinale, le bombement de l'au moins une zone de surface (21) correspondant au bombement d'une section conique et la courbure de l'au moins une ligne, le long de laquelle les diodes électroluminescentes (31) sont disposées, étant déterminée par le bombement de l'au moins une zone de surface (21),
    caractérisé en ce que l'au moins une zone de surface (21) est inclinée par rapport à l'axe optique (A-A), de sorte qu'elle est tournée vers une surface (41), réfléchissant la lumière, du réflecteur (4).
  2. Module à diodes électroluminescentes selon la revendication 1, caractérisé en ce que le support (2) présente deux zones de surface (21, 22) sur lesquelles sont respectivement disposées plusieurs diodes électroluminescentes (31, 32), une première zone de surface (21) étant concave et la deuxième zone de surface (22) étant convexe, et la première zone de surface (21) bombée de manière concave étant tournée vers une première surface (41), réfléchissant la lumière, du réflecteur (4) et la deuxième zone de surface (22) bombée de manière convexe étant tournée vers une deuxième surface (42), réfléchissant la lumière, du réflecteur (4).
  3. Projecteur de véhicule automobile (5) comprenant au moins un module à diodes électroluminescentes (1) selon une ou plusieurs des revendications 1 à 2.
  4. Projecteur de véhicule automobile selon la revendication 3, qui possède au moins trois modules à diodes électroluminescentes (1, 11, 111) qui agissent ensemble pour produire la diffusion de la lumière des feux de croisement.
  5. Projecteur de véhicule automobile selon la revendication 4, le premier module à diodes électroluminescentes (1) servant à produire une première diffusion de la lumière à large faisceau, le deuxième module à diodes électroluminescentes (11) servant à produire une deuxième diffusion de la lumière focalisée en un point et le troisième module à diodes électroluminescentes (111) servant à produire une troisième diffusion, asymétrique, de la lumière.
EP04013156A 2003-07-24 2004-06-03 Module à DEL pour un projecteur de véhicule automobile et projecteur de véhicule automobile comprenant un tel module Expired - Lifetime EP1500867B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10333837A DE10333837A1 (de) 2003-07-24 2003-07-24 Leuchtdioden-Modul für einen Fahrzeugscheinwerfer und Fahrzeugscheinwerfer
DE10333837 2003-07-24

Publications (4)

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

Family

ID=33483059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04013156A Expired - Lifetime EP1500867B8 (fr) 2003-07-24 2004-06-03 Module à DEL pour un projecteur de véhicule automobile et projecteur de véhicule automobile comprenant un tel module

Country Status (7)

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

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TW200925513A (en) * 2007-12-11 2009-06-16 Prodisc Technology Inc LED lamp structure for reducing multiple shadows
DE102007063546B4 (de) * 2007-12-21 2013-02-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Scheinwerfermodul für ein Fahrzeug
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 (de) * 2008-05-28 2009-12-24 Osram Gesellschaft mit beschränkter Haftung Fahrzeugbeleuchtungsvorrichtung mit mindestens zwei Halbleiter-Leuchtelementen
DE102008036193B4 (de) * 2008-08-02 2020-03-12 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für ein Kraftfahrzeug
EP2337991B2 (fr) * 2008-09-18 2018-03-07 Philips Intellectual Property & Standards GmbH Unité d'éclairage et phare de véhicule
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FR2946729B1 (fr) * 2009-06-10 2011-08-05 Valeo Vision Dispositifs d'eclairage, notamment a diodes electroluminescentes, aptes a generer un faisceau lumineux adaptatif
DE102010012137B4 (de) * 2009-09-08 2024-05-23 Volkswagen Ag Kraftfahrzeug-Beleuchtungseinrichtung
US10436407B2 (en) 2011-09-27 2019-10-08 Truck-Lite, Co., Llc Modular headlamp assembly for producing a light distribution pattern
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DE102012022282B4 (de) * 2012-11-14 2024-04-25 Volkswagen Ag 1 - 13Verfahren und Vorrichtung zum Kalibrieren der Hell-Dunkel-Grenze einer Gesamtlichtverteilung zumindest einer Lichtfunktion einer Scheinwerferanordnung für ein Fahrzeug
US9242581B2 (en) 2014-06-25 2016-01-26 Ford Global Technologies, Llc Automatic presentable swiveling seat
US10433418B2 (en) * 2015-12-08 2019-10-01 Signify Holding B.V. Assembly and lighting device comprising the assembly
DE102023121992A1 (de) 2023-08-17 2025-02-20 Daimler Truck AG In Abblendlicht-Schweinwerfer eines Fahrzeugs integriertes Nebellicht

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Also Published As

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

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