EP2708798B1 - Beleuchtungsmodul für Kraftfahrzeug - Google Patents

Beleuchtungsmodul für Kraftfahrzeug Download PDF

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Publication number
EP2708798B1
EP2708798B1 EP13183189.3A EP13183189A EP2708798B1 EP 2708798 B1 EP2708798 B1 EP 2708798B1 EP 13183189 A EP13183189 A EP 13183189A EP 2708798 B1 EP2708798 B1 EP 2708798B1
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EP
European Patent Office
Prior art keywords
lighting module
reflectors
lens
light
module
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Active
Application number
EP13183189.3A
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English (en)
French (fr)
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EP2708798A1 (de
Inventor
Antoine De Lamberterie
Ziyed Thabet
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
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Valeo Vision SAS
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Publication date
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Publication of EP2708798A1 publication Critical patent/EP2708798A1/de
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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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/26—Elongated lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • 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
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making

Definitions

  • the invention relates to a lighting module for a motor vehicle, in particular intended to generate a wide cut-off optical beam from a plurality of sources.
  • a motor vehicle lighting module with a plurality of concave reflectors, each comprising a light source in its concavity, in order to combine the light beams coming from each reflector to form an optical beam.
  • the document EP 1 610 057 B1 describes such a module provided with three reflectors such that the edges of the reflectors are placed against each other. The beams coming from these reflectors are then combined in such a way that a central module ensures the luminous flux at the center of the generated beam while the two side modules ensure the luminous flux at the edges of said generated beam.
  • this document also discloses the use of a folding machine folding the optical beam from a collector in order to obscure the upper part of the optical beam generated by this module and thus avoid dazzling drivers of vehicles passing or preceding this. motor vehicle.
  • the present invention results from the observation that such a module can be improved.
  • the optical beam generated by such a module has notable variations in intensity, for example between the center and the edges of the beam which have maximums specific to each light source. There is therefore not a homogeneous decrease in intensity from a maximum intensity located at the center of the beam. It is also possible to observe a decrease in light in the vicinity of the directions corresponding to the intersections between the collectors.
  • the efficiency of such a module is insufficient to allow the generation of a light beam of satisfactory intensity with optical resources limited to, for example, two light-emitting diodes with a power of 3 W. This is due to the fact that the reflectors are relatively open and do not allow to collect a maximum amount of flux.
  • the present invention aims to solve at least one of these problems. It results from a finding specific to the invention according to which, to optimize the efficiency in the transmission of the optical beam generated by a source, it The latter should be placed at the focus of a converging reflector so that a maximum of optical radiation emitted by this source is collected by this reflector and transmitted to a lens at the output of the module. In fact, a so-called “convergent” reflector converges the reflected light rays, and therefore has better efficiency.
  • This is why the present invention relates to a lighting module for a motor vehicle headlight capable of forming a wide cut-off light beam.
  • This module comprises optical elements formed by an output lens and by a plurality of concave reflectors associated with a bending machine having a reflecting face intended to bend light beams generated by light sources located in the concavities of the reflectors.
  • the lens is toric, and these optical elements are arranged so as to make the light beams generated by said light sources converge at focal points prior to the transmission of these light beams by the output lens.
  • the reflectors are oriented such that segments joining the source and the focal point of each reflector converge in the direction of the wide light beams.
  • Such a module has many advantages.
  • it uses reflectors collecting a large part of the optical radiation emitted by light sources located at their focal points. By concentrating this radiation at a focal point prior to its transmission through the output lens, such a module makes it possible to generate lighting lights, typically fog lights, with two sources of limited power, for example two light emitting diodes of power less than or equal to 3W.
  • such a module makes it possible to form a single beam, from several beams, exhibiting particularly satisfactory homogeneity.
  • a single beam exhibits a homogeneous decrease from a central part, which improves the comfort of the drivers of a vehicle equipped with such a module.
  • the lighting module is characterized in that the focusing points are located on a line of foci of the toric lens.
  • the lighting module is characterized in that the folder follows, partially or totally, the line of focal points of the lens.
  • the reflectors are based on an ellipsoid shape having two focal points, the light source of a reflector being situated in a first focal point of this ellipsoid and the focal point being situated in a second focal point of this same ellipsoid.
  • the axis of a reflector passing through the first and the second focal point of the ellipsoid at its base, forms a non-zero angle with the optical axis of the lens.
  • the reflector has a plane of symmetry allowing it to be installed on both sides of a vehicle.
  • the total lateral opening of the optical beam is between 40 degrees and 100 degrees.
  • the invention also relates to a method of manufacturing a lighting module for a motor vehicle headlight according to at least claim 1 attached.
  • the method comprises the step of arranging these optical elements so as to cause the light beams generated by said light sources to converge at focal points prior to the transmission of these light beams by the output lens and the The step of orienting the reflectors such that segments joining the source and the focal point of each reflector converge in the direction of the broad light beam.
  • a lighting module 100 for a motor vehicle headlight that is to say capable of forming a wide light beam 101 with cut-off, is described.
  • a beam 101 is wide when it has a total lateral opening of between 40 degrees and 100 degrees, i.e. again a half-opening, with reference to the longitudinal axis of symmetry of the vehicle, between 25 degrees and 50 degrees, the opening (or half-opening) being set for a minimum intensity of about 100 Candelas.
  • Figures 1 and 2 represent views in vertical and horizontal sections respectively of such a module 100 at the level of a reflector 102, these sections being made in vertical and horizontal planes passing through the source 104 and the point 106 of focusing of the light emitted by this source 104 and reflected by reflector 102.
  • this focusing point 106 is located upstream of an output lens 108 - toric lens - so that the optical beam emitted by source 104 passes through lens 108 after having concentrated in this focal point 106.
  • a focusing point 106 located upstream of the lens 108, it is possible to concentrate a large part of the light emitted by the source 104.
  • various rays 110, 112 and 114 emitted by the source 104 are represented in their optical path going from the source 104 to the wide beam 101 passing through the focal point 106.
  • This arrangement of the optical elements is obtained by considering that the source 104 is located at the level of the first focal point of an ellipsoid serving as a base for generating the reflector 102, the second focal point of the ellipsoid being placed at the level of the focal point 106.
  • the entire module 100 is constructed using symmetry between the different reflectors.
  • this symmetry is obtained with respect to a vertical plane 200 ( Figure 2 ) passing through the optical axis of the toric lens 108, which in this embodiment consists of the intersection between the vertical plane 200 with a horizontal plane passing through the source 104.
  • the optical axis of the toric lens 108 is for example materialized by the Oy axis on the Figures 3 and 4 .
  • the reflectors 102 and 102 ', the light sources 104 and 104' and the focal points 106 and 106 ' are symmetrical with respect to the plane 200.
  • the segments 202 joining the source 104 and the point 106, and 202 'joining the source 104' and the point 106 ' form an angle ⁇ with the median plane 200.
  • the line 118 of the focal points of the lens 108 which comprises, among other things, the points 106 and 106 'of focusing of the reflectors 102 and 102'.
  • the lens 108 being toric, the beams 101 and 101 'are focused to infinity in the vertical direction, while in the horizontal direction they undergo a spreading, to allow them to fulfill their lighting function.
  • the reflectors 102 and 102 ' are associated with a substantially horizontal flat plate 120 as shown in the Figures 3 and 4 .
  • the plane of this plate 120 passes preferably, but not necessarily, substantially through the centers of the light sources 104 and 104 '.
  • the reflective plate 120 is frequently called a "bender" and it has a front end edge suitable for forming the cut in the lighting beam, that is to say the upper limit above which there is no. no light rays.
  • the cut-off is horizontal and the area illuminated by the beam from the reflectors 102 and 102 'is located below a horizontal line.
  • the toric lens 108 has a horizontal radius of curvature of 80mm and its center has coordinates (0, -30mm, 0).
  • the center of toric lens 108 is defined by the center of curvature in the Oxy plane of the inlet and outlet faces of lens 108.
  • Such a lens has a line of foci 118 coincident with the edge of the folder (not shown) , the distance between this line 118 of focal points is the entry face of the lens 108 being a draft T of 28.8mm.
  • the folder is extruded (of 4mm following + y in the example of Figures 3 and 4 ) in a shape that follows the two rising light in the center of the beam. This shape bends the images in the center of the beam above the cutoff that come from the association of the two focal points of the two sources.
  • the Figure 7 shows the evolution at the center of the beam while the Figure 8 shows the distribution of light on the surface of the folder, this Figure also highlighting the importance of the depth of the folder (32mm in the previous example) in order to collect the maximum flow).
  • This Figure 8 shows in top view the light concentration projected by the mirrors on the folder (the axes are graduated in millimeters horizontally and vertically). In particular, it can be seen that the maximum light is projected onto the edge of the folder, but it can also be seen that a not insignificant amount of light reaches the folder upstream of the edge.
  • the minimum depth is thus determined for sending more light rays onto the folder, so as to reflect them towards the lens, with the aim of increasing the luminous flux of the final beam 101. This can therefore be optimized. depth according to the desired final light beam, that is to say according to the regulations to which this light beam must comply.
  • a correction of the reflectors and an improvement of the homogeneity is carried out by focusing on the end and the V-shape of the beam.
  • This part of the beam results from the edges of reflectors 102 and 102 '( fig. 3 ) which are modified by choosing a focal length different from the focal length for the ellipsoid which served as the basis for the production of the reflectors so as to straighten the rise of the light by focusing slightly before the second focal point of the reflector.
  • connection surface is introduced between the two sections of the manifold while ensuring tangential continuity over the entire cavity, which makes it possible to achieve a flow shown on the diagrams.
  • Figures 9 and 10 which exhibits a resulting flux of 276 lumens from two light-emitting diode type sources having an optical power of 250 lumens taking into account the outer glass which in this case represents 15% attenuation. A particularly satisfactory final yield of 65% is thus obtained.

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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)

Claims (8)

  1. Beleuchtungsmodul (100) für einen Scheinwerfer eines Kraftfahrzeugs, welches in der Lage ist, ein breites Lichtbündel (101) mit Hell-Dunkel-Grenze zu bilden, und mit optischen Elementen ausgestattet ist, die eine Austrittslinse (108) und mehrere konkave Reflektoren (102, 102'), die einer Ablenkvorrichtung zugeordnet sind, die eine reflektierende Seite aufweist, die dazu bestimmt ist, Lichtbündel (110, 112, 114, 116) abzulenken, die von in den Konkavitäten der Reflektoren (102, 102') befindlichen Lichtquellen (104, 104') erzeugt werden, umfassen, wobei die Austrittslinse (108) torisch ist und diese optischen Elemente so angeordnet sind, dass sie die von den Lichtquellen (104, 104') erzeugten Lichtbündel (110, 112, 114, 116) vor der Übertragung dieser Lichtbündel durch die Austrittslinse (108) in Fokussierungspunkten (106, 106') konvergieren lassen,
    dadurch gekennzeichnet, dass die Reflektoren derart ausgerichtet sind, dass Segmente (202, 202'), welche die Quelle (104, 104') und den Fokussierungspunkt (106, 106') jedes Reflektors (102, 102') verbinden, in der Richtung des breiten Lichtbündels (11) konvergent sind.
  2. Beleuchtungsmodul (100) nach Anspruch 1, dadurch gekennzeichnet, dass sich die Fokussierungspunkte (106, 106') auf einer Linie (118) von Brennpunkten der Linse (108) befinden.
  3. Beleuchtungsmodul (100) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Ablenkvorrichtung teilweise oder vollständig der Linie von Brennpunkten (118) der Linse (108) folgt.
  4. Beleuchtungsmodul (100) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Reflektoren (102, 102') auf einer Ellipsoidform basieren, die zwei Brennpunkte aufweist, wobei die Lichtquelle (104, 104') eines Reflektors sich in einem ersten Brennpunkt dieses Ellipsoids befindet und der Fokussierungspunkt (106, 106') sich in einem zweiten Brennpunkt desselben Ellipsoids befindet.
  5. Beleuchtungsmodul (100) nach Anspruch 4, dadurch gekennzeichnet, dass die Achse (202, 202') eines Reflektors (102, 102'), die durch den ersten und den zweiten Brennpunkt des Ellipsoids, auf dem er basiert, verläuft, einen von null verschiedenen Winkel mit der optischen Achse (Oy) der Linse (108) bildet.
  6. Beleuchtungsmodul (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es eine Symmetrieebene (200) aufweist.
  7. Beleuchtungsmodul nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die gesamte seitliche Öffnung des optischen Bündels zwischen 40 Grad und 100 Grad beträgt.
  8. Verfahren zur Herstellung eines Beleuchtungsmoduls (100) für einen Scheinwerfer eines Kraftfahrzeugs nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass es den Schritt des Anordnens dieser optischen Elemente umfasst, derart, dass sie die von den Lichtquellen (104, 104') erzeugten Lichtbündel (110, 112, 114, 116) vor der Übertragung dieser Lichtbündel durch die Austrittslinse in Fokussierungspunkten (106, 106') konvergieren lassen, und den Schritt des Ausrichtens der Reflektoren, derart, dass Segmente (202, 202'), welche die Quelle (104, 104') und den Fokussierungspunkt (106, 106') jedes Reflektors (102, 102') verbinden, in der Richtung des breiten Lichtbündels (11) konvergent sind.
EP13183189.3A 2012-09-17 2013-09-05 Beleuchtungsmodul für Kraftfahrzeug Active EP2708798B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1258683A FR2995661B1 (fr) 2012-09-17 2012-09-17 Module d'eclairage pour vehicule automobile

Publications (2)

Publication Number Publication Date
EP2708798A1 EP2708798A1 (de) 2014-03-19
EP2708798B1 true EP2708798B1 (de) 2020-09-30

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EP13183189.3A Active EP2708798B1 (de) 2012-09-17 2013-09-05 Beleuchtungsmodul für Kraftfahrzeug

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US (1) US9134000B2 (de)
EP (1) EP2708798B1 (de)
JP (1) JP6261921B2 (de)
FR (1) FR2995661B1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3003521B1 (fr) * 2013-03-21 2016-10-07 Valeo Vision Module d'eclairage et/ou de signalisation pour vehicule automobile
FR3026820B1 (fr) 2014-10-02 2016-12-09 Valeo Vision Module d'eclairage pour un dispositif d'eclairage en bandes d'un projecteur pour vehicule automobile
FR3028007A1 (fr) * 2014-10-29 2016-05-06 Peugeot Citroen Automobiles Sa Projecteur de vehicule
JP6492675B2 (ja) * 2015-01-15 2019-04-03 市光工業株式会社 車両用灯具
JP6595881B2 (ja) * 2015-10-27 2019-10-23 スタンレー電気株式会社 拡散配光光学系及び車両用灯具
JP6840606B2 (ja) * 2017-04-14 2021-03-10 スタンレー電気株式会社 レンズ体および車両用灯具
JP6757909B2 (ja) 2017-06-05 2020-09-23 パナソニックＩｐマネジメント株式会社 照明装置および車両用前照灯
US10851959B2 (en) 2017-11-22 2020-12-01 Stanley Electric Co., Ltd. Vehicle headlight
ES2948775T3 (es) 2018-09-05 2023-09-18 Flex N Gate Advanced Product Dev Llc Faro de exploración de haz adaptativo
FR3119439B1 (fr) * 2021-01-29 2023-02-10 Valeo Vision Dispositif d’éclairage de la route d’un véhicule automobile
FR3119440B1 (fr) * 2021-01-29 2024-01-12 Valeo Vision Dispositif d’éclairage de la route d’un véhicule automobile
FR3130011B1 (fr) * 2021-12-07 2024-04-05 Valeo Vision Dispositif lumineux d’un véhicule automobile
US11808422B2 (en) * 2021-12-13 2023-11-07 Xin Dong Smart vehicle lighting device

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JP2010218964A (ja) * 2009-03-18 2010-09-30 Ichikoh Ind Ltd 車両用灯具

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JP4391870B2 (ja) * 2004-04-02 2009-12-24 株式会社小糸製作所 車両用照明灯具
JP4459702B2 (ja) * 2004-04-27 2010-04-28 株式会社小糸製作所 車両用照明灯具
FR2872257B1 (fr) * 2004-06-24 2006-08-18 Valeo Vision Sa Module d'eclairage pour vehicule automobile et projecteur comportant un tel module
FR2881509B1 (fr) * 2005-02-01 2007-03-16 Valeo Vision Sa Projecteur verticalise pour vehicule automobile
FR2904091B1 (fr) * 2006-07-21 2009-03-06 Valeo Vision Sa Module optique pour projecteur de vehicule automobile
FR2910592B1 (fr) * 2006-12-20 2012-07-20 Valeo Vision Module de projecteur lumineux de vehicule automobile pour un faisceau a coupure
JP5425184B2 (ja) * 2008-04-25 2014-02-26 コーニンクレッカ フィリップス エヌ ヴェ ランプ組立体
DE102008036194B4 (de) * 2008-08-02 2016-10-20 Automotive Lighting Reutlingen Gmbh Lichtmodul für eine Beleuchtungseinrichtung für ein Kraftfahrzeug

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JP2010218964A (ja) * 2009-03-18 2010-09-30 Ichikoh Ind Ltd 車両用灯具

Also Published As

Publication number Publication date
FR2995661B1 (fr) 2018-11-02
US9134000B2 (en) 2015-09-15
EP2708798A1 (de) 2014-03-19
FR2995661A1 (fr) 2014-03-21
US20140078768A1 (en) 2014-03-20
JP6261921B2 (ja) 2018-01-17
JP2014060155A (ja) 2014-04-03

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