EP2210037B1 - Projecteur pour véhicules - Google Patents

Projecteur pour véhicules Download PDF

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Publication number
EP2210037B1
EP2210037B1 EP08846538.0A EP08846538A EP2210037B1 EP 2210037 B1 EP2210037 B1 EP 2210037B1 EP 08846538 A EP08846538 A EP 08846538A EP 2210037 B1 EP2210037 B1 EP 2210037B1
Authority
EP
European Patent Office
Prior art keywords
light
optical unit
module
wide
headlamp
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.)
Active
Application number
EP08846538.0A
Other languages
German (de)
English (en)
Other versions
EP2210037A1 (fr
Inventor
Mirco GÖTZ
Franz-Josef Kalze
Michael Kleinkes
Wolfgang Pohlmann
Thomas Vieregge
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella GmbH and Co KGaA
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Publication date
Application filed by Hella GmbH and Co KGaA filed Critical Hella GmbH and Co KGaA
Publication of EP2210037A1 publication Critical patent/EP2210037A1/fr
Application granted granted Critical
Publication of EP2210037B1 publication Critical patent/EP2210037B1/fr
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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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • 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 invention relates to a headlight for vehicles according to the preamble of claim 1.
  • a headlight for vehicles with a light module which has a plurality of LED light sources which are combined on a substrate to form an LED field. Furthermore, the headlight has a sensor device by means of which objects in the vehicle apron can be detected. The sensor device is connected to a control device which, depending on the sensor signal, controls individual LED light sources of the LED field in such a way that a light beam emitted by the light module has recess areas where an oncoming road user or road user driving ahead would be blinded.
  • the known headlamp thus enables a light distribution to be generated which, with the exception of the cut-out area, illuminates a large part of the vehicle apron.
  • a control device for a headlamp is known in which evaluation electronics, depending on the brightness of the incident light, act on control electronics in such a way that this adjusts the light distribution in accordance with a motorway light distribution or a low beam distribution.
  • evaluation electronics depending on the brightness of the incident light, act on control electronics in such a way that this adjusts the light distribution in accordance with a motorway light distribution or a low beam distribution.
  • the production of relatively wide and narrow light bundles is not known from this document.
  • a headlight for vehicles is known in which several LED light sources are used.
  • the LED light sources are preceded by a light modulation device and a plurality of light guides and a converging lens in order to produce a low beam distribution.
  • the light beams generated by the LED light sources can each be individually modulated. However, this is associated with a relatively high expenditure on control technology.
  • a headlight for vehicles which is a headlight for vehicles with a light module which has two groups of LED light sources for generating a motorway light distribution, each of which is combined in matrix form on a substrate to form an LED field.
  • the LED fields are each preceded by an optical unit which has such a different imaging characteristic that light beams of different solid angles are emitted and produce light spots of different sizes on a measuring screen.
  • the light module is thus designed to be relatively complex.
  • the object of the present invention is to develop a headlamp for vehicles in such a way that improved illumination of the vehicle apron is ensured in a simple manner without glare to road users located in the vehicle apron.
  • the invention has the features of claim 1.
  • the at least two cells of the light module and the optical unit are designed in such a way that at least two broad light beams are emitted, each of which strikes the vehicle apron at a horizontal critical angle of at least 8 ° and at a vertical critical angle of maximum 1 °.
  • relatively wide light spots can advantageously be generated on a measuring screen, so that the superimposed ones are switched on arranged wide light spots the range of the illumination can be increased.
  • the vertical limit angle is limited to a maximum of 1 °, the light-dark limit of the light distribution or the range of the light beam can be gradually increased or decreased.
  • the optical unit is designed in such a way that the wide light beams emitted at different vertical angles are emitted by overlapping adjacent broad light beams. This advantageously results in a continuous transition when "switching on” or “switching off” cells of the light module, while the light-dark boundary has a relatively high luminance gradient.
  • each cell of the light module has only a single LED chip.
  • the upstream optical unit is designed in such a way that an “expansion” takes place in the horizontal direction of the light beam emitted by the respective LED chip and thus a relatively broad light spot is generated on the measuring screen.
  • the first light module 2 consists of three cells A, B, C of light sources, each cell A, B, C having a single LED chip 4.
  • the LED chip 4 can have, for example, a single LED or, for example, four common cast LEDs.
  • the light generated by the middle cell B is scattered by means of the optical unit 6 in such a way that a second broad light bundle b is generated to form a middle broad light spot 8, which is arranged on the measuring screen 18 at least partially overlapping above the first broad light bundle a.
  • a light generated by the lower cell C is the optical unit 6 is scattered in such a way that a further wide light beam c is imaged on the measuring screen to form an upper wide light spot 9.
  • the second light module 3 has an LED chip 11 as the light source, to which a second optical unit 10 is assigned to form a basic light distribution 12.
  • the LED chip 11 or the second optical unit 10 is designed such that a low-beam light distribution with a Light-dark boundary HDG is formed, which has a 15 ° rise 13.
  • the horizontal critical angle ⁇ of the light bundles a, b, c is 10 °, the wide light spots 7, 8, 9 formed being arranged symmetrically to a vertical V.
  • the vertical critical angle ⁇ of the light bundles a, b, c is approximately 0.3 °, so that the lower light bundle a is used to generate a motorway light distribution serves.
  • the lower light spot 7 generated by the lower light bundle a extends overlapping to a horizontal cut-off line HDG of the low-beam light distribution 12.
  • the freeway light can take place, for example, by dimmed switching on of the cell A, so that the vehicle apron illumination can be expanded homogeneously.
  • the other cells B and C can then be switched on or off. This connection or disconnection can also be made dimmable.
  • the electrically switchable activation of the cells A, B, C enables a "cross-fading" of an upper edge region 17 of the basic light distribution, which adaptively adapts the cut-off line HDG of the resulting light distribution to the current traffic situation.
  • the LED chips 11 of the cells A, B, C or the optics unit 6 are preferably designed such that when the cells A, B, C are switched on, an overlap of adjacent broad light spots 7, 8, 9 occurs. How from Figure 2 it can be seen, the wide light spots 7, 8, 9 have the same contour, so that the wide light beams a, b, c have the same horizontal critical angle ⁇ and vertical critical angle ⁇ .
  • each of these can also be formed by a row of LED chips 4, the optical unit 6 imaging the light emitted by the respective rows of LED chips 4 into pixel-like light spots which are in a horizontal row are arranged.
  • This row of light spots corresponds in each case to the wide light spots 7, 8, 9 when the cells A, B, C are implemented with the respective single LED chips 4.

Landscapes

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

Claims (8)

  1. Phare pour véhicules avec un premier module lumineux (2) comportant plusieurs sources lumineuses LED (4) et une unité optique (6) affectée aux sources lumineuses LED (4), avec un dispositif de capteur (15) pour la détection d'un objet se trouvant devant le véhicule, avec une unité de commande (14) qui commande le premier module lumineux (2) en fonction d'un signal de détection fourni par le dispositif de capteur (15) et/ou d'un signal de commutation d'un dispositif de commutation (16) pour l'émission d'un faisceau lumineux prédéfini (a, b, c), le premier module lumineux (2) présentant une première cellule (A) comportant au moins une source lumineuse LED (4) de sorte que, en interaction avec l'unité optique (6), un premier faisceau lumineux large (a) soit généré pour une obtenir une répartition de l'éclairage autoroute (7), le premier module lumineux (2) présentant au moins une seconde cellule (B, C) comportant au moins une source lumineuse LED (4) de sorte que, en interaction avec la même unité optique (6), au moins un autre large faisceau lumineux (b, c) puisse être généré immédiatement au-dessus du premier large faisceau lumineux (a) et que la première cellule (A) et au moins une autre cellule (B, C) soit représentée par une puce LED individuelle (4) soit par une rangée de puces LED et que l'unité optique (6) présente une caractéristique de représentation telle que le premier large faisceau (a) et au moins un autre large faisceau lumineux (b, c) soient émis sous un angle horizontal limite (a) d'au moins 8°, caractérisé par le fait que l'unité optique (6) du premier module lumineux (2) présente une caractéristique de représentation telle que le premier large faisceau lumineux (a) et au moins un autre large faisceau lumineux (b, c) soient émis sous un angle vertical limite (β) de maximum 1° et que l'unité optique (6) du premier module lumineux (2) soit conçue de manière à ce qu'un second module lumineux (3) comportant une source lumineuse LED (11) et une unité optique (10) soit prévu pour constituer une répartition du faisceau de croisement avec une ligne de coupure (HDG) comme répartition de base de l'éclairage.
  2. Phare selon la revendication 1, caractérisé par le fait qu'au moins la première cellule (A) du premier module lumineux (2) peut être commandée avec variation de l'intensité lumineuse.
  3. Phare selon la revendication 1 ou 2, caractérisé par le fait que l'unité optique (6) du premier module lumineux (2) est conçue de manière à ce que le premier large faisceau lumineux (a) et les autres larges faisceaux lumineux (b, c) présentent le même angle limite horizontal et/ou vertical (a ,β).
  4. Phare selon l'une des revendications 1 à 3, caractérisé par le fait que l'unité optique (6) du premier module lumineux (2) est conçue de manière à ce que les larges faisceaux lumineux (a, b, c) soient situés l'un au-dessus de l'autre sur un écran de mesure (18) en constituant un chevauchement des faisceaux lumineux voisins (a, b, c).
  5. Phare selon l'une des revendications 1 à 4, caractérisé par le fait que l'unité optique (6) du premier module lumineux (2) est conçue de manière à ce que le premier large faisceau lumineux (a) se trouve à un angle vertical de -0,28° par rapport à l'horizontale (H) sur l'écran de mesure (18).
  6. Phare selon l'une des revendications 1 à 5, caractérisé par le fait que les points lumineux (7) constitués par le premier large faisceau lumineux (a) chevauche un bord supérieur (17) de la répartition de base de l'éclairage (12).
  7. Phare selon l'une des revendications 1 à 6, caractérisé par le fait que les cellules (A, B, C) du premier module lumineux (2) sont disposées les unes à côtés des autres dans le sens vertical.
  8. Phare selon l'une des revendications 1 à 7, caractérisé par le fait que les cellules (A, B, C) du premier module lumineux (2) puissent être commandées par l'unité de commande (14) de manière à ce que la ligne de coupure (HDG) de la répartition de base de l'éclairage (12) soit modifiée dans le sens vertical en fonction du trafic déterminée au moyen du dispositif de capteur (15).
EP08846538.0A 2007-11-06 2008-11-05 Projecteur pour véhicules Active EP2210037B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007052746A DE102007052746A1 (de) 2007-11-06 2007-11-06 Scheinwerfer für Fahrzeuge
PCT/EP2008/064980 WO2009059990A1 (fr) 2007-11-06 2008-11-05 Projecteur pour véhicules

Publications (2)

Publication Number Publication Date
EP2210037A1 EP2210037A1 (fr) 2010-07-28
EP2210037B1 true EP2210037B1 (fr) 2020-04-01

Family

ID=40299306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08846538.0A Active EP2210037B1 (fr) 2007-11-06 2008-11-05 Projecteur pour véhicules

Country Status (3)

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EP (1) EP2210037B1 (fr)
DE (1) DE102007052746A1 (fr)
WO (1) WO2009059990A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3006422B1 (fr) * 2013-05-30 2017-08-11 Valeo Vision Module d'eclairage pour projecteur de vehicule automobile, et projecteur comportant de tels modules
FR3021092B1 (fr) * 2014-05-13 2019-04-26 Valeo Vision Systeme d'eclairage pour projecteur de vehicule automobile comprenant plusieurs modules d'eclairage

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6144158A (en) * 1996-11-07 2000-11-07 Sensci Corporation Adaptive/anti-blinding headlights
DE10129743C2 (de) * 2001-06-20 2003-05-08 Daimler Chrysler Ag Fahrzeugscheinwerfer, mit einer Anzahl von elektronischen Leuchtelementen als Lichtquelle
DE10153031C2 (de) * 2001-10-26 2003-10-23 Audi Ag Fahrzeugscheinwerfer mit individuell und/oder gruppenweise ansteuerbaren elektrooptischen Elementen
DE10242864A1 (de) * 2002-09-14 2004-03-25 Adam Opel Ag Automatische Scheinwerfer-Regeleinrichtung für ein Kraftfahrzeug mit mindestens einem mindestens eine Lichtquelle aufweisenden Scheinwerfer
DE10261183B3 (de) * 2002-12-20 2004-06-03 Daimlerchrysler Ag Fahrzeugscheinwerfer mit mehreren zu einem Array zusammengefassten LEDs.
US20040263346A1 (en) * 2003-06-27 2004-12-30 Guide Corporation, A Delaware Corporation Solid state adaptive forward lighting system
DE102004042092B4 (de) 2004-08-30 2020-01-02 HELLA GmbH & Co. KGaA Verfahren zur Ansteuerung einer Lichterzeugungseinrichtung für Kraftfahrzeuge sowie Vorrichtung
DE102005041234A1 (de) 2005-08-31 2007-03-01 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
FR2894905B1 (fr) * 2005-10-25 2009-07-10 Valeo Vision Sa Procede d'eclairage module d'une route et projecteur de vehicule mettant en oeuvre ce procede.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102007052746A1 (de) 2009-05-07
WO2009059990A1 (fr) 2009-05-14
EP2210037A1 (fr) 2010-07-28

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