EP1434002A1 - Beleuchtungseinheit für Fahrzeugscheinwerfer - Google Patents

Beleuchtungseinheit für Fahrzeugscheinwerfer Download PDF

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Publication number
EP1434002A1
EP1434002A1 EP03293063A EP03293063A EP1434002A1 EP 1434002 A1 EP1434002 A1 EP 1434002A1 EP 03293063 A EP03293063 A EP 03293063A EP 03293063 A EP03293063 A EP 03293063A EP 1434002 A1 EP1434002 A1 EP 1434002A1
Authority
EP
European Patent Office
Prior art keywords
reflector
module
optical axis
lighting
focus
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.)
Granted
Application number
EP03293063A
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English (en)
French (fr)
Other versions
EP1434002B1 (de
Inventor
Pierre Albou
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.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1434002A1 publication Critical patent/EP1434002A1/de
Application granted granted Critical
Publication of EP1434002B1 publication Critical patent/EP1434002B1/de
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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/10—Combinations of only two kinds of elements the elements being reflectors and screens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting module for vehicle headlamp producing a cut-off type lighting beam particularly suitable for use with diodes emitting.
  • a beam of cut-off lighting means a beam lighting that has a directional limit or cutoff, above which the emitted light intensity is low.
  • the low beam and fog lamp functions are examples of cut-off light beams, in accordance with the European legislation in force.
  • the cut is made by means of a cover, which is formed of a vertical plate of adapted profile, which is interposed axially between the elliptical reflector and the lens convergent, and which is arranged in the vicinity of the second focus of the reflector.
  • the cache allows to hide the light rays from the source bright and reflected by the reflector towards the lower part of the focal plane of the convergent lens, and which would be, in the absence of a cache, issued by the projector above the cut.
  • a disadvantage of this type of projector is that a part significant light flux emitted by the source dissipates in the face back of the cache.
  • Another solution is to make a lighting module using a light source and a Fresnel optic or a reflector type complex surface. To create a break, it is necessary to align the edges of the light source images on the measurement screen used to validate the regulation lighting beam.
  • the image of the virtual source corresponding to the diode is usually round is diffuse and it is much more complicated to make a clean cut by aligning the corresponding images of round shapes.
  • This difficulty can be overcome by using a diaphragm with the diode, but then we lose a significant amount of light energy produced by the diode.
  • the emission indicators of the most known diodes performance are complex and achieving a homogeneous beam is very difficult to obtain from the direct images of the diode.
  • the present invention aims to provide a lighting module for vehicle headlamp producing a cut-off type lighting beam to achieve a clean cut, including using a diode as a light source, as well as a homogeneous lighting beam while offering less loss of luminous flux by avoiding the use of a cache.
  • the majority of the luminous flux emitted by the source is used in the light beam produced by the module.
  • the lighting module according to the invention makes it possible to a clean cut, especially with a diode because it projects to the front the image of the cutoff edge.
  • the shape of the cut in the beam lighting is therefore determined by the profile of the cutting edge.
  • the module according to the invention exploits a property of elliptical lighting modules that is to "mix" the images of the light source at the second focus of the first reflector, which improves the homogeneity of the lighting beam produced.
  • such a module has improved optical performance compared to a system using a lens; there are indeed fewer losses due to the non-unit reflection coefficient of the reflecting surface of the second reflector only by glassy reflections in the lens.
  • said second reflector has a substantially paraboloidal reflection surface luminous.
  • said second reflector is a reflector of the type with complex reflection surface of the light rays.
  • the optical axis of said first reflector forms a angle ⁇ with the optical axis of said second reflector so that said first reflector does not intercept light rays reflected by said second reflector.
  • This angle is chosen and optimized using the property of the diodes of emit only in a half-space so that the first reflector does not intercept a portion of the flux reflected by the second reflector.
  • said cutoff edge has a substantially identical to the focal line of said second reflector in a plane containing the optical axis of said second reflector and perpendicular the plane defined by the optical axis of said first reflector and the optical axis of said light source.
  • Such a profile makes it possible to improve the cutoff by offsetting aberrations of the second reflector, especially in the case of a surface paraboloidal, when one moves away from the optical axis of the second reflector.
  • said cutting edge is straight.
  • the cut can be improved by using a second reflector of complex surface type.
  • the substantially elliptical surface of said first reflector is formed by an angular sector substantially of revolution about the optical axis of said first reflector and that this angular sector extends vertically above the reflective face said third reflector.
  • the module according to the invention may comprise several neighboring light sources which are generally aligned according to a direction substantially perpendicular to the optical axis of said first reflector.
  • the module according to the invention comprises means for moving said third reflector along the optical axis of said second reflector.
  • the present invention also relates to a method of manufacture of a module according to the invention characterized in that said first, second and third reflectors are made in one piece.
  • the small thickness of the module makes it possible to inject all the reflectors at one time in a mold without drawer with a thin piece.
  • said piece is obtained by molding a material chosen from a material thermoplastic, a thermosetting material or an injected metal.
  • the material used can be a thermoplastic material standard type PPS (Polysulfide phenylene), the reflective parts then being metallized, for example by aluminum. Such a manufacturing has the advantage of low cost.
  • the material can also be a thermosetting material. This solution requires the presence a radiator for evacuating heat from the light source, in particular when it comes to a photodiode.
  • the material used can also be an injected metal of the type Aluminum. Such a solution makes it possible to avoid the use of a radiator, the metal of the part being directly used to evacuate the heat.
  • said piece is obtained by stamping.
  • the present invention finally relates to a lighting projector to make a crossover regulatory lighting beam, comprising a plurality of lighting modules according to the invention, substantially identical structure and arranged substantially parallel.
  • FIG. 1 schematically represents a side view of the module 1 for vehicle headlamp according to the invention.
  • the substantially elliptical surface 6 is made in the form of a substantially angular sector of revolution and extending into the half space above an axial plane perpendicular to the plane of the sheet and containing the optical axis A1. As a first approximation, the surface 6 is a half ellipsoid.
  • surface 6 may not be perfectly elliptical and have several specific profiles planned for optimize the light distribution in the lighting beam produced by the module 1. This implies that the first reflector 2 is not perfectly of revolution.
  • the light source 5 is arranged substantially at the first F1 focus of the first reflector 2.
  • the light source 5 is a diode electroluminescent light which emits the majority of its light energy towards the reflective inner surface of the substantially elliptical surface 6.
  • the optical axis A2 is substantially parallel to the longitudinal axis of a vehicle not shown and equipped with the lighting module 1.
  • the optical axis A1 forms an angle ⁇ with the optical axis A2.
  • the angle ⁇ as shown in Figure 1 is equal to 90 ° but we will see by the This angle can take other values.
  • the reflecting surface 7 is of substantially paraboloidal shape, the axis of the parabola being the optical axis A2.
  • the third reflector 4 also called a folder, lies between the first reflector 2 and the second reflector 3 and comprises at least one reflective upper face 8 and a front end edge 9, said edge of cut.
  • the cutting edge 9 is arranged in the vicinity of the second focus F2 of the first reflector 2.
  • edge 9 as shown in this figure is straight but we will see later that the profile of this edge 9 can be adapted to compensate for the field curvature of the surface substantially Paraboloidal 7.
  • the operating principle of the lighting module 1 according to the invention is as follows:
  • the light source 5 is arranged at the first focus F1 of the first reflector 2, most of the rays emitted by the source 5, after reflected on the inner face 6, is returned to the second focus F2 or in the vicinity of it. This is the case of the radius R1 which passes along the edge 9. R1 is then reflected on the surface 7 of the second reflector 3 in a direction substantially parallel to the optical axis A2 of the second reflector 3.
  • An advantage of the lighting module 1 according to the invention is that it does not obscure a significant part of the light rays emitted by the source 5, as is the case in a conventional lighting module having a hidden.
  • the reflective surface 8 makes it possible to "fold" the images of the light source 5 which are reflected by the elliptical surface 6 of the first reflector 2 at the second focus F2.
  • the "fold” formed by this "folding" of images helps to form a clear cut in the lighting beam reflected by the second reflector 3.
  • angle ⁇ is chosen and optimized using the property diodes to emit only in a half-space so the first reflector 2 does not intercept some of the flux reflected by the second reflector 3.
  • the angle ⁇ chosen to illustrate the invention is equal to 90 ° but this angle can also be greater than 90 ° in order to get a more module compact while allowing the first reflector 2 not to intercept a part of the flux reflected by the second reflector 3.
  • FIG. 2 represents the profile of the cutoff edge 9 in the plane containing the optical axis A2 and perpendicular to the representation plane of Figure 1.
  • This profile 10 substantially follows the focal line of the second reflector; this focal line corresponds to the intersection of the place of the best homes of the second reflector with the plane containing the optical axis A2 and perpendicular to the plane of representation of Figure 1 which is the plane defined by the optical axis A1 of the first reflector 2 and the optical axis of said source bright 5.
  • Another solution is to keep a straight cut edge and to replace the substantially paraboloidal surface of the second reflector with a surface of the complex type adapted to improve the cut and control the distribution of light along the optical axis of the second reflector.
  • FIG. 3 represents a perspective view of a module 1 lighting according to the invention.
  • This module 1 is identical to that shown in FIG. difference that the angle ⁇ between the optical axis A2 of the second reflector 3 and the optical axis A1 of the first reflector 2 is equal to approximately 120 ° so as to realize a compact module while avoiding that the first reflector 2 intercepts a portion of the flux reflected by the second reflector.
  • the three reflectors 2, 3 and 4 were here made in one piece 1.
  • This module 1 further comprises ribs 11. Note that the reflective surface of the third reflector 4 has two inclined planes in V 8A and 8B so that the cutting edge 9 has a profile next approximately the focal length of the second reflector 3. This V-shaped profile is only an approximation of the theoretical focal point but other profiles curves can also be used.
  • the material used can be a standard thermoplastic material of the type PPS (Polysulfide of phenylene) or a thermosetting material, the reflective portions being metallized, for example by aluminum.
  • PPS Polysulfide of phenylene
  • thermosetting material for example by aluminum.
  • the material used can be an injected metal of the aluminum type.
  • Such a solution makes it possible to overcome the use of a radiator, using the properties of the metal to evacuate the heat.
  • the manufacturing method as described uses a method of molding but can also use a stamping.
  • the module according to the invention has been described as realized in one piece but we can also make the different reflectors separately.
  • the light source described was a photodiode but it can also be another type of source such as the free end of a fiber optic bundle. You can also use any lamp placed at the first focus of an ellipsoidal light collector, the light output at the second focus of the collector.

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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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP03293063A 2002-12-20 2003-12-08 Beleuchtungseinheit für Fahrzeugscheinwerfer Expired - Lifetime EP1434002B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0216430A FR2849158B1 (fr) 2002-12-20 2002-12-20 Module d'eclairage pour projecteur de vehicule
FR0216430 2002-12-20

Publications (2)

Publication Number Publication Date
EP1434002A1 true EP1434002A1 (de) 2004-06-30
EP1434002B1 EP1434002B1 (de) 2006-10-11

Family

ID=32406330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03293063A Expired - Lifetime EP1434002B1 (de) 2002-12-20 2003-12-08 Beleuchtungseinheit für Fahrzeugscheinwerfer

Country Status (7)

Country Link
US (1) US6966675B2 (de)
EP (1) EP1434002B1 (de)
JP (1) JP4537047B2 (de)
AT (1) ATE342472T1 (de)
DE (1) DE60308989T2 (de)
ES (1) ES2274189T3 (de)
FR (1) FR2849158B1 (de)

Cited By (12)

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EP1528312A1 (de) * 2003-10-31 2005-05-04 Valeo Vision Beleuchtungsmodul für Kfz-Scheinwerfer
EP1772666A1 (de) * 2005-10-05 2007-04-11 Ichikoh Industries, Ltd. Fahrzeugscheinwerfer
WO2007057818A2 (en) 2005-11-17 2007-05-24 Philips Intellectual Property & Standards Gmbh Lighting device and method for directing light
EP1843085A1 (de) * 2006-04-06 2007-10-10 Valeo Vision Beleuchtungsmodul für Scheinwerfer eine Motorfahrzeugts und Scheinwerfer, der ein solches Modul umfasst
EP1881264A1 (de) * 2006-07-21 2008-01-23 Valeo Vision Optikmodul für Fahrzeugscheinwerfer
EP2131098A1 (de) 2008-06-06 2009-12-09 Valeo Vision Scheinwerfer für Fahrzeuge
EP2168812A1 (de) 2008-09-26 2010-03-31 Valeo Vision Beleuchtungssystem für ein Kraftfahrzeug, das die Emission eines Abblendlichts verändern kann
DE102009040753A1 (de) * 2009-09-10 2011-03-24 MÜNZ, Christoph Reflektoranordnung
WO2012013601A1 (fr) * 2010-07-26 2012-02-02 Valeo Vision Module optique de dispositif d'eclairage et/ou de signalisation d'un vehicule automobile
FR2964724A1 (fr) * 2010-09-09 2012-03-16 Valeo Vision Module optique de dispositif d'eclairage et/ou de signalisation d'un vehicule automobile.
EP1708513B1 (de) * 2005-03-30 2015-04-29 Samsung Electronics Co., Ltd. Beleuchtungseinheit und Bildprojektionsapparat mit dieser Einheit
US9347639B2 (en) 2010-07-26 2016-05-24 Valeo Vision Optical module of an illuminating and/or signalling device of a motor vehicle

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FR2966221B1 (fr) 2010-08-04 2015-09-18 Valeo Vision Module d'eclairage a coupure avec reflecteur parabolique dispose sur un reflecteur elliptique
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FR2970061B1 (fr) * 2011-01-03 2020-03-06 Valeo Vision Dispositif d'eclairage et/ou de signalisation, notamment pour vehicule automobile
CN103256542B (zh) * 2012-02-21 2017-06-16 三营超精密光电(晋城)有限公司 车前灯灯具模组
FR2994247B1 (fr) * 2012-08-01 2014-08-22 Peugeot Citroen Automobiles Sa Dispositif d’eclairage a guide(s) de lumiere a face arriere a profil de conique et a elements de diffusion definis sur une ligne de foyer
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FR3055980B1 (fr) 2016-09-15 2019-06-28 Valeo Vision Systeme optique pour faisceau lumineux pixelise
CZ307413B6 (cs) * 2017-06-13 2018-08-01 Varroc Lighting Systems, s.r.o. Signální svítilna pro motorová vozidla
FR3077367B1 (fr) * 2018-01-31 2021-04-16 Valeo Vision Module lumineux bi-fonction avec surface eclairee commune
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DE102018109503A1 (de) * 2018-04-20 2019-10-24 HELLA GmbH & Co. KGaA Scheinwerfer für ein Kraftfahrzeug mit elektrisch ansteuerbarem Flüssigkristalldisplay

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Cited By (23)

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EP1528312A1 (de) * 2003-10-31 2005-05-04 Valeo Vision Beleuchtungsmodul für Kfz-Scheinwerfer
EP1708513B1 (de) * 2005-03-30 2015-04-29 Samsung Electronics Co., Ltd. Beleuchtungseinheit und Bildprojektionsapparat mit dieser Einheit
EP1772666A1 (de) * 2005-10-05 2007-04-11 Ichikoh Industries, Ltd. Fahrzeugscheinwerfer
US7607806B2 (en) 2005-10-05 2009-10-27 Ichikoh Industries, Ltd. Vehicle lamp
US7798691B2 (en) 2005-11-17 2010-09-21 Koninklijke Philips Electronics N.V. Lighting device and method for directing light
WO2007057818A2 (en) 2005-11-17 2007-05-24 Philips Intellectual Property & Standards Gmbh Lighting device and method for directing light
WO2007057818A3 (en) * 2005-11-17 2008-01-03 Philips Intellectual Property Lighting device and method for directing light
EP1843085A1 (de) * 2006-04-06 2007-10-10 Valeo Vision Beleuchtungsmodul für Scheinwerfer eine Motorfahrzeugts und Scheinwerfer, der ein solches Modul umfasst
FR2899668A1 (fr) * 2006-04-06 2007-10-12 Valeo Vision Sa Module d'eclairage pour projecteur lumineux de vehicule automobile, et projecteur comportant un tel module.
US7543964B2 (en) 2006-04-06 2009-06-09 Valeo Vision Lighting module for a motor vehicle light headlamp, and headlamp comprising a module of this type
EP1881264A1 (de) * 2006-07-21 2008-01-23 Valeo Vision Optikmodul für Fahrzeugscheinwerfer
FR2904091A1 (fr) * 2006-07-21 2008-01-25 Valeo Vision Sa Module optique pour projecteur de vehicule automobile
EP2131098A1 (de) 2008-06-06 2009-12-09 Valeo Vision Scheinwerfer für Fahrzeuge
EP2168812A1 (de) 2008-09-26 2010-03-31 Valeo Vision Beleuchtungssystem für ein Kraftfahrzeug, das die Emission eines Abblendlichts verändern kann
DE102009040753A1 (de) * 2009-09-10 2011-03-24 MÜNZ, Christoph Reflektoranordnung
WO2012013601A1 (fr) * 2010-07-26 2012-02-02 Valeo Vision Module optique de dispositif d'eclairage et/ou de signalisation d'un vehicule automobile
CN103119360A (zh) * 2010-07-26 2013-05-22 法雷奥照明公司 机动车辆的照明和/或信号装置的光学模块
US9121561B2 (en) 2010-07-26 2015-09-01 Valeo Vision Optical module of a lighting and/or signaling device for a motor vehicle
US9347639B2 (en) 2010-07-26 2016-05-24 Valeo Vision Optical module of an illuminating and/or signalling device of a motor vehicle
US9500337B2 (en) 2010-07-26 2016-11-22 Valeo Vision Optical module of a lighting and/or signaling device for a motor vehicle
CN103119360B (zh) * 2010-07-26 2017-02-08 法雷奥照明公司 机动车辆的照明和/或信号装置的光学模块
US9885454B2 (en) 2010-07-26 2018-02-06 Valeo Vision Optical module of an illuminating and/or signaling device of a motor vehicle
FR2964724A1 (fr) * 2010-09-09 2012-03-16 Valeo Vision Module optique de dispositif d'eclairage et/ou de signalisation d'un vehicule automobile.

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FR2849158A1 (fr) 2004-06-25
EP1434002B1 (de) 2006-10-11
JP4537047B2 (ja) 2010-09-01
FR2849158B1 (fr) 2005-12-09
ATE342472T1 (de) 2006-11-15
US20040130907A1 (en) 2004-07-08
ES2274189T3 (es) 2007-05-16
US6966675B2 (en) 2005-11-22
DE60308989D1 (de) 2006-11-23
DE60308989T2 (de) 2007-06-14
JP2004207235A (ja) 2004-07-22

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