EP3014172B1 - Indirektbeleuchtungsvorrichtung für ein kraftfahrzeugrücklicht - Google Patents

Indirektbeleuchtungsvorrichtung für ein kraftfahrzeugrücklicht Download PDF

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Publication number
EP3014172B1
EP3014172B1 EP14790119.3A EP14790119A EP3014172B1 EP 3014172 B1 EP3014172 B1 EP 3014172B1 EP 14790119 A EP14790119 A EP 14790119A EP 3014172 B1 EP3014172 B1 EP 3014172B1
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EP
European Patent Office
Prior art keywords
diffusing element
lighting device
lighting
light
diffusing
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
EP14790119.3A
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English (en)
French (fr)
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EP3014172A2 (de
Inventor
Alain Buisson
Yves Fichot
Aurélie SORNIN
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.)
Marelli Automotive Lighting France SAS
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Marelli Automotive Lighting France SAS
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Publication date
Application filed by Marelli Automotive Lighting France SAS filed Critical Marelli Automotive Lighting France SAS
Publication of EP3014172A2 publication Critical patent/EP3014172A2/de
Application granted granted Critical
Publication of EP3014172B1 publication Critical patent/EP3014172B1/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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout 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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/33—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors characterised by their material, surface treatment or coatings

Definitions

  • the present invention relates to the field of vehicle lighting and signaling, in particular motor vehicles. It relates more particularly to a device for a vehicle traffic light comprising indirect lighting, the light of which, emitted by at least one LED, is reflected by a diffusing material which directs it towards an output optic, itself diffusing, with several variants possible as needed.
  • Transparent auxiliary screens are already known in the prior art in which the light emitted by an auxiliary light source can propagate, these screens being intended to equip a light, in particular a rear light, of a motor vehicle. Local discontinuities provided in the material of the screen constitute foci of light scattering outside these screens (see patent publication French No. 2 868 506 ).
  • German patent application DE 103 11 317 A lighting device for a vehicle is described comprising a light guide comprising diffusion structures located essentially at the focal point of reflective surfaces which thus allow homogeneous illumination to be diffused.
  • Other lighting devices comprising diffusing elements are known from US 2012/163031 A1 , US 2011/317442 A1 Or US 2011/128751 A1 .
  • a new device for a motor vehicle lighting and/or signaling light comprising one or more LEDs and incorporating a light guide, characterized in that it comprises, combined with said guide, a translucent screen, said translucent screen being provided with graining and arranged between said guide and the visible face of the light or of the set of lights concerned, so as to provide a luminous function of homogeneous color, while said translucent screen is provided with graining on the one or the other or both of its main faces capable of being crossed by the light emitted by the LED(s), and while the piece of translucent material is placed in front of said guide, advantageously at a distance of approximately 5 20 mm from said guide.
  • inhomogeneities may appear in the diffused light, in particular at the level of the guides, including those which may be provided with curtains or diffuser screens.
  • the first subject of the present invention is a device for a lighting and/or signaling light, in particular for motor vehicle rear lights, as defined above and in the following description.
  • the invention also relates to an optical unit comprising such a device, as well as the use of said device for lighting or signaling, in particular but not exclusively in the taillights of motor vehicles.
  • each diffusing element offers at least two means of modulating the diffusion which it induces, namely the nature of the material which constitutes it and/or the state of one of its external surfaces.
  • the lighting device according to the invention implements indirect lighting in the sense that the light issuing from the light source leaves the lighting device after reflection on the surface of the first diffusing element.
  • the light source is carried by an opaque support which obstructs any direct exit of light outside the lighting device.
  • the first diffusing element in order to increase the amount of reflected light, is opalescent white in color. Such a color allows efficient reflection of light.
  • the reflection surface of the first diffusing element has an irregular surface state.
  • irregular surface condition it should be understood that the reflection surface of the first diffusing element does not comprise a regular pattern such as mirrors or Fresnel lenses but a random or pseudo-random irregular pattern.
  • the irregular character of the surface condition can be assimilated to an inhomogeneous character.
  • This irregular state can for example be obtained by graining. Graining here means the formation of discontinuities in and/or on the constituent material of the diffusing element concerned.
  • the first diffusing element is made of a material loaded with particles of dimensions greater than or equal to one micron and/or comprising inclusions of dimensions greater than or equal to one micron.
  • the constituent material of the first diffusing element is then an inhomogeneous material such as an opaline material.
  • an opaline type material can for example be PMMA (poly methyl methacrylate) or PC (polycarbonate) to which are added materials chosen from microbeads of material with an opalescent effect or a dispersible material, in particular to create inclusions such as micro bubbles by injecting and distributing a gas, in particular C02, to give a random character to the opalescence produced.
  • the opaline material can be white or be colored, in particular to appear super-light amber or blue, by techniques known to those skilled in the art. It can thus make it possible to obtain a color in the on state that is different from the color in the off state. It is also possible to use in the light source one or more LEDs which emit colored light, for example red or amber.
  • the second and third diffusing elements are translucent.
  • This translucent state can be obtained in different ways, either by the state of one or the other or even of the two external surfaces of each diffusing element or by the nature of the material which constitutes it, or the combination of several of these three means.
  • the front surface and/or the rear surface of the second diffusing element has an irregular surface state.
  • This irregular state can be obtained in the same way as for the irregular state of the reflection surface of the first diffusing element.
  • front and rear are used in the context of the present invention in relation to the path of the light coming from the LED light source, the front face receiving the light before the rear face. The same is true for the terms upstream and downstream.
  • the second diffusing element is made of a material filled with particles of dimensions greater than or equal to one micron and/or comprising inclusions of dimensions greater than or equal to one micron.
  • a filled material can be a transparent material, colored or not, the inclusions of which give it a translucent character.
  • the material, also called matrix, can be PMMA (poly methyl methacrylate) or PC (polycarbonate).
  • the front surface and/or the rear surface of the third diffusing element has an irregular surface state.
  • This irregular surface condition can be analogous to any irregular surface condition of the second diffusing element.
  • the third diffusing element is made of a material filled with particles of dimensions greater than or equal to one micron and/or comprising inclusions of dimensions greater than or equal to one micron.
  • This translucent filled material can be as described previously for the second diffusing element.
  • the lighting device comprises a transparent and/or translucent indicator adapted to close the case.
  • the sight glass provides watertight closure.
  • the third diffusing element is suitable for closing the case.
  • the third diffusing element provides a watertight closure.
  • the third diffusing element has a smooth rear surface.
  • the opaque support is located on the rear face or on the front face of a portion of the third diffusing element which is offset with respect to the lighting opening and which carries the light source.
  • the second diffusing element is doubled, preferably by overmoulding, by the offset portion of the third diffusing element.
  • the second diffusing element bears the opaque element which partially conceals it.
  • a lighting device comprises in a housing 1 at least one LED light source comprising at least one printed circuit board or PCB 2 carrying at least one LED 3.
  • the light source is fixed on an opaque support 4 comprising at least one lighting opening 5.
  • the lighting device then comprises a first diffusing element 6 adapted to reflect and diffuse the light in the direction of the lighting opening 5.
  • the lighting device comprises, at the level of the opening, a translucent screen forming the second diffusing element 7 adapted to be traversed by the light diffused by the first diffusing element 6 and to diffuse said light.
  • the lighting device also comprises a third diffusing element 8 which in turn contributes to the diffusion of the light passing through it.
  • the combination of the three diffusing elements 6, 7, 8, the first working in reflection, the other two in transmission thus produces the emission towards the outside, on the frontal or front face of the light concerned, of a homogenized lighting , whose source is not or very little visible to the observer.
  • the light is then not perceived by the observer as coming from a juxtaposition of intense point sources but as coming from a single diffuse source without a hot spot, which reduces the glare of the observer when he is close to the fire.
  • the front and rear faces of the third diffusing element 8 are provided with graining 11.
  • the rear face relative to the PCB 2 carrying the LED 3 of the part 10 of the element 8 is advantageously provided with an opaque element, in the form of the opaque support 4, 4 conceals the diffusing parts opposite, therefore other than those dedicated to the third diffusing element 8, in the eyes of the observer.
  • This concealment element can in practice be profiled and metallized suitably, and thus act as a shield vis-à-vis the light rays other than those that the third diffusing element receives and diffuses.
  • the PCB 2 supporting the LEDs is moved away from the plane of the part of the third diffusing element located outside the savings or opening aforesaid, while the PCB+LEDs assembly is surrounded by a support having only one chosen or adjustable opening at convenience next to the LEDs.
  • the opaque support 4, 9 is located, as appropriate, on the rear face or on the front face of a portion 10 of the third diffusing element projecting from the opening, the PCB is then fixed on this portion of the third diffusing element.
  • the material of the second diffusing element 7 is doubled, preferably by overmoulding, by said projecting part of the third diffusing element 8.
  • the first diffusing element is made of opal white PC [polycarbonate].
  • the second and third diffusing elements 7, 8 are preferably made of PMMA [polymethyl methacrylate] or PC [polycarbonate], with at least one irregular outer surface, preferably grained, sandblasted or brushed.
  • the constituent material of the second and third diffusing elements can also be loaded with microscopic particles of dimensions greater than one micron so as to increase the diffusing power of said elements.
  • the case 1 is closed by an indicator or window 12.
  • FIG. 2 shows another embodiment which differs from that of the Fig. 1 in that the opaque support 4, 9 is flat and applied against the free face of the third diffusing element 10 which is itself advantageously formed by overmoulding with the second diffusing element 7;
  • the opaque element 4 or 9 is integrated into the light in front of the second diffusing element 7 and thus releases its opposite surface on which is applied the third diffusing element 8 which can then constitute on its own the light 12 of the fire, whose diffusion volume defined by the profile of the element 8 overflows projecting outwards from the fire.
  • This embodiment has the advantage of making it possible to have a lighting and/or signaling light housing of reduced thickness.
  • the maximum thickness represented by A in the figure can thus be between 20 mm and 30 mm.
  • the device according to the invention is mainly intended to equip, with the appropriate energy source and connectors, lighting systems forming a lantern, brake light, raised brake light, flashing light and/or optionally front daytime running light of vehicles automobiles.

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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 (14)

  1. Beleuchtungsvorrichtung für eine Beleuchtungs- und/oder Signalisierungsleuchte eines Fahrzeugs, insbesondere für eine Rückleuchte, dadurch gekennzeichnet, daß sie in einem Gehäuse (1)
    - mindestens eine LED-Lichtquelle (3), die auf einem undurchsichtigen Träger (4, 9) befestigt ist, der eine Beleuchtungsöffnung (5) aufweist, die für den Durchgang des zum Beobachter indirekt auszustrahlenden Lichts bestimmt ist,
    - ein undurchsichtiges erstes Ausstrahlungselement (6), das strahlaufwärts von der Beleuchtungsöffnung angeordnet ist und dazu ausgelegt ist, das von der Lichtquelle kommende Licht zur Öffnung hin zu reflektieren und auszustrahlen,
    - ein durchscheinendes zweites Ausstrahlungselement (7), das strahlabwärts vom ersten Ausstrahlungselement und nahe der Beleuchtungsöffnung (5) angeordnet ist und dazu bestimmt ist, das vom ersten Ausstrahlungselement reflektierte und ausgestrahlte Licht zu übertragen und auszustrahlen,
    - ein durchscheinendes drittes Ausstrahlungselement (8), das strahlabwärts vom zweiten Ausstrahlungselement (7) angeordnet ist und dazu ausgelegt ist, das vom zweiten Ausstrahlungselement kommende Licht nach außerhalb der betreffenden Leuchte zu übertragen und auszustrahlen, wobei das dritte Ausstrahlungselement im eingeschalteten Zustand zur Geometrie der Leuchte beiträgt und durch sein nach außerhalb der Leuchte hervorstehendes Profil an der Beleuchtungsöffnung (5) ein Ausstrahlungsvolumen definiert,
    aufweist.
  2. Beleuchtungsvorrichtung gemäß dem vorangehenden Anspruch, dadurch gekennzeichnet, daß das erste Ausstrahlungselement von weißer Farbe ist.
  3. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Reflexionsoberfläche des ersten Ausstrahlungselements einen unregelmäßigen Oberflächenzustand aufweist.
  4. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das erste Ausstrahlungselement aus einem Material gefertigt ist, das mit Teilchen mit Größen von größer als oder gleich einem Mikrometer versetzt ist und/oder das Einschlüsse mit Größen von größer als oder gleich einem Mikrometer aufweist.
  5. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die vordere Oberfläche und/oder die hintere Oberfläche des zweiten Elements einen unregelmäßigen Oberflächenzustand aufweist.
  6. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das zweite Ausstrahlungselement aus einem Material gefertigt ist, das mit Teilchen mit Größen von größer als oder gleich einem Mikrometer versetzt ist und/oder das Einschlüsse mit Größen von größer als oder gleich einem Mikrometer aufweist.
  7. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die vordere Oberfläche und/oder die hintere Oberfläche des dritten Elements einen unregelmäßigen Oberflächenzustand aufweist.
  8. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das dritte Ausstrahlungselement aus einem Material gefertigt ist, das mit Teilchen mit Größen von größer als oder gleich einem Mikrometer versetzt ist und/oder das Einschlüsse mit Größen von größer als oder gleich einem Mikrometer aufweist.
  9. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß sie eine durchsichtige und/oder durchscheinende Scheibe (12) aufweist, die dazu ausgelegt ist, das Gehäuse abzuschließen.
  10. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das dritte Ausstrahlungselement (8) dazu ausgelegt ist, das Gehäuse abzuschließen.
  11. Beleuchtungsvorrichtung gemäß Anspruch 9, dadurch gekennzeichnet, daß das dritte Ausstrahlungselement (8) eine glatte rückwärtige Oberfläche aufweist.
  12. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der undurchsichtige Träger (4, 9) auf der Rückseite oder auf der Vorderseite eines gegenüber der Beleuchtungsöffnung, die die Lichtquelle trägt, versetzten Abschnitts des dritten Ausstrahlungselements angeordnet ist.
  13. Beleuchtungsvorrichtung gemäß Anspruch 11, dadurch gekennzeichnet, daß das zweite Ausstrahlungselement (7) vorzugsweise durch Überspritzen durch den versetzten Abschnitt des dritten Ausstrahlungselements (8) überdeckt wird.
  14. Beleuchtungsvorrichtung gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das zweite Ausstrahlungselement den undurchsichtigen Träger trägt, der es teilweise verdeckt.
EP14790119.3A 2013-06-28 2014-06-30 Indirektbeleuchtungsvorrichtung für ein kraftfahrzeugrücklicht Active EP3014172B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1301537A FR3007821B1 (fr) 2013-06-28 2013-06-28 Dispositif a eclairage indirect pour feu arriere de vehicule automobile
PCT/FR2014/051676 WO2014207414A2 (fr) 2013-06-28 2014-06-30 Dispositif a éclairage indirect pour feu arrière de véhicule automobile

Publications (2)

Publication Number Publication Date
EP3014172A2 EP3014172A2 (de) 2016-05-04
EP3014172B1 true EP3014172B1 (de) 2023-07-12

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EP14790119.3A Active EP3014172B1 (de) 2013-06-28 2014-06-30 Indirektbeleuchtungsvorrichtung für ein kraftfahrzeugrücklicht

Country Status (6)

Country Link
EP (1) EP3014172B1 (de)
JP (1) JP2016526768A (de)
CN (1) CN105492824B (de)
FR (1) FR3007821B1 (de)
PL (1) PL3014172T3 (de)
WO (1) WO2014207414A2 (de)

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Also Published As

Publication number Publication date
CN105492824B (zh) 2019-07-30
FR3007821B1 (fr) 2018-04-20
EP3014172A2 (de) 2016-05-04
WO2014207414A3 (fr) 2015-04-16
FR3007821A1 (fr) 2015-01-02
JP2016526768A (ja) 2016-09-05
PL3014172T3 (pl) 2023-12-11
WO2014207414A2 (fr) 2014-12-31
CN105492824A (zh) 2016-04-13

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