EP3467375B1 - Beleuchtungsvorrichtung mit geringer dicke und homogener ausleuchtung - Google Patents

Beleuchtungsvorrichtung mit geringer dicke und homogener ausleuchtung Download PDF

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Publication number
EP3467375B1
EP3467375B1 EP18193052.0A EP18193052A EP3467375B1 EP 3467375 B1 EP3467375 B1 EP 3467375B1 EP 18193052 A EP18193052 A EP 18193052A EP 3467375 B1 EP3467375 B1 EP 3467375B1
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EP
European Patent Office
Prior art keywords
lighting device
light sources
substrate
screen
light
Prior art date
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Active
Application number
EP18193052.0A
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English (en)
French (fr)
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EP3467375A1 (de
Inventor
Natacha AUDY
Franck MILLON
Lingxuan Zhu
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 EP3467375A1 publication Critical patent/EP3467375A1/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
    • F21S43/30—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
    • 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]
    • 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
    • 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
    • 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
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/19—Attachment of light sources or lamp holders
    • F21S43/195—Details of lamp holders, terminals or connectors
    • 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
    • F21S43/37—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
    • 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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • 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 the field of lighting and light signaling, in particular for motor vehicles.
  • the published patent document FR 2 697 485 A1 discloses a traffic light comprising several light sources of the light-emitting diode (LED) type arranged on a support and illuminating essentially perpendicular to the support towards a diffusion screen.
  • the traffic light comprises a framework with orifices under which the LEDs are housed.
  • the latter are there of the “Brewster” type, that is to say of an old type with mounting brackets on a printed circuit, said legs extending axially under the body of the LEDs.
  • Such an assembly requires a certain thickness which, in certain applications, may prove not to be available.
  • the LEDs illuminate directly towards the screen, which gives a pixelated, or discreet, aspect to the luminous image produced.
  • the published patent document US 2011/0051412 A1 relates to a display screen backlighting unit, in particular of the liquid crystal or plasma type.
  • the backlight unit includes light sources of the side-lit light emitting diode (LED) type. These sources are arranged on a reflecting substrate, the light emitted mainly in the direction of the substrate is reflected by the reflecting surface of said substrate towards the rear face of the display screen, with a view to its backlighting.
  • LED side-lit light emitting diode
  • Such an arrangement is advantageous in that it promotes the homogeneity of the backlighting, avoiding the appearance of light points at the locations of light sources, in particular when they illuminate directly towards the display screen.
  • This arrangement also allows a reduction in thickness of the backlight unit.
  • the light power produced is low, essentially in that a large part of the light produced propagates in the unit and fails to pass through the screen.
  • the documents US 2016/076720 A1 and EP 2 671 756 A2 describe similar lighting devices for motor vehicles.
  • the document EP 2 671 756 A2 discloses a light device according to the preamble of claim 1.
  • the object of the invention is to provide a luminous device which overcomes at least one of the drawbacks of the above-mentioned state of the art. More particularly, the invention aims to provide a light device of thin construction and producing a homogeneous light image.
  • the subject of the invention is a light device, in particular for a motor vehicle, comprising: a substrate; light sources of the side-lit electroluminescence diode type, arranged on the substrate and illuminating in main directions oriented along the substrate; a screen arranged to receive the light rays emitted by the light sources; remarkable in that the substrate comprises openings and the lighting device further comprises reflecting surfaces arranged opposite the openings so as to reflect towards the screen part of the light rays emitted by the light sources.
  • the screen is made of transparent or translucent material.
  • the screen is advantageously diffusing.
  • the substrate is made of an electrically insulating material, such as of the FR-4 type, and comprises one or more printed circuits configured to supply the light sources.
  • each of the reflecting surfaces is configured to reflect the part of light rays substantially in line with the corresponding aperture following a divergent beam.
  • the reflecting surfaces are also diffusing.
  • the substrate comprises two opposite main faces, the screen being arranged facing a first of said faces and the reflecting surfaces being arranged mainly facing the second. of said faces.
  • each of the light sources is adjacent to one of the openings and illuminates substantially in the direction of said opening.
  • At least two of the light sources are respectively associated with each of the openings,.
  • the substrate extends in a longitudinal direction, each of the openings comprising an edge extending transversely to said direction, the light source (s) adjacent to said opening being arranged along said edge.
  • the edge of each of the openings is on a portion of the substrate forming a tab.
  • the tongue thus formed is advantageous in that it relieves the zone for receiving the light source or sources of stresses linked to the bending of the substrate when the latter has, in the mounted state, a curved profile.
  • each of the tabs is formed by two notches in the corresponding opening, on either side of the corresponding edge.
  • the openings are arranged along the longitudinal direction and the substrate has a curved longitudinal profile.
  • the device comprises a support to which the substrate and the screen are attached, said support comprising the reflecting surfaces.
  • This configuration is advantageous in more than one way. In fact, in addition to an economic advantage, it has an advantage of controlling the positioning tolerances of the reflecting surfaces and an advantage of compactness.
  • the support comprises projecting portions forming the reflecting surfaces and partially penetrating the openings.
  • the reflecting surfaces are produced by metallization of the surfaces of the projecting portions.
  • the support is in one piece of plastic material.
  • the substrate is fixed to the support, for example by screwing, clipping or snap-fastening.
  • the screen is fixed to the support, for example by clipping and / or by screwing or welding.
  • each of the reflecting surfaces comprises a first distal portion of the corresponding light source or sources and a second proximal portion of said light source or sources, the second portion having an average inclination with respect to the aperture. greater than an average inclination of the first portion with respect to said opening.
  • each of the projecting portions has a projection between the first and second portions of the reflecting surface.
  • each of the first and second portions of each of the reflecting surfaces has a concave curved profile.
  • the device further comprises a light source control unit configured in such a way that at least two of said sources receive two different light intensity setpoints. In this case, all the light sources are not lit with the same intensity, in particular for photometric purposes.
  • the device further comprises a light source control unit configured to gradually turn on the light sources step by step in a given direction so as to modulate a thus illuminated surface of the screen.
  • control unit is configured to also gradually extinguish, step by step, the light sources located at one end of the illuminated surface which is opposite, in the given direction, to the illuminated light sources. step by step, so as to move the thus illuminated surface of the screen.
  • the measures of the invention are advantageous in that they make it possible to produce a light device of small thickness with great homogeneity of light in the light image produced. They also make it possible to produce a bent or curved lighting device, and this economically by means in particular of an initially flat substrate and capable of undergoing bending during its attachment to the support.
  • the production of a very homogeneous light image also has the advantage of being able to modulate the surface of the light image continuously and gradually. By such modulation, information can be expressed. he may be vehicle operating conditions, such as whether it is accelerating or decelerating.
  • the figures 1 and 2 illustrate in perspective and in an exploded manner a lighting device according to the invention.
  • the light device 2 consists, essentially, of a substrate 4 provided with openings 6, light sources 8 of the light-emitting diode (LED) type arranged on the substrate 4, adjacent to the openings 6, a support 10 and d 'a screen 12 arranged vis-à-vis the substrate 4 and the light sources 8.
  • LED light-emitting diode
  • the support 10 is advantageously made of plastic material by injection. It comprises a main portion 10.1 extending along the device and a series of portions 10.2 projecting from the main portion 10.1. Reflective surfaces 14 are formed on these protruding portions 10.2, these portions possibly being intended to penetrate at least partially the openings 6 formed in the substrate 4. The reflecting surfaces may be produced by metallization of the protruding portions 10.2.
  • the light sources 8 are side-lit LEDs (commonly referred to as “sideleds” in English), such as for example the LSA67F model from Osram®. Of such LEDs illuminate along a main axis which is transverse, preferably perpendicular, to the mounting plane on the substrate. These LEDs illuminate in a cone centered on the main axis and which can form an angle of the order of 60 ° with said axis, corresponding to an opening angle of the cone of the order of 120 °, the light intensity being maximum on the main axis and greater than or equal to 50% of said maximum value at the limits of the cone in question.
  • the light sources 8 are thus configured to illuminate laterally towards the openings 6 to which they are adjacent, respectively, and, therefore, towards the corresponding reflecting surfaces 14.
  • each light source Part of the luminous flux emitted by each light source is thus reflected by the corresponding reflecting surface, and this towards the screen 12; another part of the luminous flux being directed directly from the source to the screen 12.
  • the paths of the rays emitted by the light sources are detailed below in relation to the figure 4 .
  • the substrate 4 is advantageously made of an electrically insulating material on which one or more printed circuits are formed, with a view to supplying the light sources 8.
  • the printed circuits are not visible but are in themselves well known to those skilled in the art.
  • a connector 16 can be placed on the substrate 4, electrically connected to the printed circuits and thus to the light sources 8.
  • the substrate is advantageously made of epoxy resin reinforced with glass fibers, such as for example of the FR-4 type (acronym of "Flame Resistant") commonly used as a support for printed circuits.
  • the substrate in question advantageously has a reduced thickness, less than or equal to 1.6 mm, so as to be able to be bent as can be seen at figure 2 .
  • the presence of the openings 6 in the substrate 4 promotes its bending in that they reduce its stiffness and therefore the forces to be applied at the level of its attachment to the support 10 to ensure its retention in the bent state.
  • the screen 12 is made of a transparent or translucent material, such as in particular PMMA (polymethyl methacrylate). It is advantageously produced by injection. It may include means for fixing to the support 10, such as in particular clipping lugs 12.1 and / or screw receiving areas 12.2.
  • PMMA polymethyl methacrylate
  • the figure 3 is another perspective view of a lighting device of the figures 1 and 2 , where the screen is absent.
  • each aperture 6 has a polygonal shape, the edge 6.1 of which forms one side.
  • the openings 6 have a generally rectangular shape, it being understood that other shapes are possible.
  • the light sources 8 are arranged on a tab 18 formed by a portion of the substrate 4 and by two notches 6.2 of the opening 6, on either side of the edge 6.1. These notches thus extend advantageously along the longitudinal axis of the device. This configuration is particularly advantageous when the substrate is subjected to a bending force, as is the case in the present example embodiment. Indeed, these tabs are free from the bending stresses applied to the substrate, thus avoiding the application of stresses at the level of the fixing and the connection of light sources to the substrate, as well as of the body of these sources themselves.
  • the light sources are arranged along the edge 6.1 so as to illuminate mainly in the direction of the corresponding opening 6, that is to say the opening comprising said edge 6.1.
  • each of the reflecting surfaces 14 can be subdivided into two portions, namely a first portion 14.1 distal of the light sources 8 and a second portion 14.2 proximal to said sources. These two portions 14.1 and 14.2 are advantageously connected by a projection 14.3.
  • each of the light surfaces 14 or the first and second portions 14.1 and 14.2 of light surfaces 14 can be subdivided longitudinally between two portions, each of said portions being associated with one of the two light sources 8.
  • the figure 4 is a schematic longitudinal sectional view of the device of figures 1 to 3 , the section passing through one of the light sources 8. It is possible to observe there the paths of light rays emitted by one of the light sources 8 shown, it being understood that these paths also apply to the other light sources.
  • the substrate 4, the support 10 and the screen 12 are shown there rectilinear for reasons of clarity of presentation, it being understood that the principles exposed also apply in a curved or curved configuration, such as to the device of the figures 1 to 3 .
  • the main axis 20 of illumination of the light sources is parallel to the openings, in this case to the substrate (insofar as the latter is plane in the illustrated embodiment).
  • the light source 8 thus illuminates in this direction towards the corresponding aperture 6.
  • the substrate 4 comprises a first face 4.1 facing the screen 12 and a second face 4.2 opposite the first.
  • the rays 22 emitted in the direction of the screen 12 are refracted and transmitted by the screen 12.
  • the rays 24 emitted through the aperture 6 are reflected by the reflecting surface 14 which is located opposite said aperture 6.
  • the rays encountering the distal reflective surface portion 14.1 of the light source 8 are reflected to the left of the aperture 6 while the rays encountering the proximal reflecting surface portion 14.2 of the light source 8 are reflected to the right of the aperture 6. It is understood that these directions may be different in another embodiment. It can also be observed that the projection 14.3 between the two portions of reflecting surfaces 14.1 and 14.2 allows the second portion 14.2 to be raised or raised relative to the first portion 14.1. This raising gives the second portion 14.2, at the level of the projection 14.3, a greater inclination with respect to the plane of the opening than on the first portion 14.1 at the level of said projection 14.3. The rays incident on the second portion 14.2 are thus reflected more to the right.
  • the construction of the reflecting surface 14 which has just been described thus makes it possible to widen the reflected light beam, which contributes to a homogenization of the light image emitted by the screen 12.
  • this is not represented at the figure 4 , in order to avoid overloading the schematic representation, the rays emitted by the neighboring light sources directly towards the screen portion illuminated by the light beam reflected by the reflecting surface 14, namely the neighboring light sources located on the right, will complete the beam in question. This results in very good homogeneity, despite the use of discrete light sources and the absence of an optical light guide.
  • the particular construction of the reflecting surface 14 which has just been described above can be replaced by other profiles of the reflecting surface while obtaining the same effect of spreading the reflected beam.
  • the reflecting surfaces 14 may have diffusing properties in order to diffuse the rays reflected by said surfaces.
  • the screen 12 is advantageously diffusing, it may in particular have a certain roughness at the level of at least one of its faces (advantageously the exit face) and / or a filler material diffusing within the transparent or translucent material. the constituent.
  • the figure 5 illustrates in perspective the lighting device 2 of the figures 1 to 3 , electrically connected, via the connector 16, to a control unit 26 for the light sources of said device.
  • the light sources of the device can all be interconnected so that they can only be switched on together.
  • the light sources associated with each aperture can be supplied independently of the other light sources.
  • Such a configuration is advantageous in that it makes it possible to vary the surface of the illuminated screen, in a progressive manner and providing an effect of continuity due to the particularly homogeneous nature of the lighting produced.
  • Such a configuration is also advantageous for static lighting, essentially in that it allows different light sources to be supplied with different electrical intensities, in particular for photometric purposes.
  • the figures 6 to 8 illustrate an example of variation of the illuminated surface of the screen of the device of figures 1 to 3 and 5 .
  • the control unit 26 figure 5
  • Such a modulation or such a displacement is interesting in combination with a very homogeneous illumination of the screen because it can give the impression similar to that of a liquid whose limits are displaced.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Claims (16)

  1. Leuchtvorrichtung (2), insbesondere für ein Kraftfahrzeug, welche umfasst:
    - ein Substrat (4);
    - Lichtquellen (8) vom Typ von Leuchtdioden mit seitlicher Beleuchtung, die auf dem Substrat (4) angeordnet sind und in Hauptrichtungen (20) leuchten, die entlang des Substrats (4) verlaufen;
    - einen Schirm (12), der so angeordnet ist, dass er die von den Lichtquellen (8) ausgesendeten Lichtstrahlen empfängt;
    dadurch gekennzeichnet, dass das Substrat (4) Durchbrechungen (6) umfasst und die Leuchtvorrichtung (2) außerdem reflektierende Flächen (14) umfasst, die so gegenüber den Durchbrechungen (6) angeordnet sind, dass sie einen Teil der von den Lichtquellen (8) ausgesendeten Lichtstrahlen zu dem Schirm (12) hin reflektieren.
  2. Leuchtvorrichtung (2) nach Anspruch 1, dadurch gekennzeichnet, dass das Substrat (4) zwei einander gegenüberliegende Hauptseiten (4.1, 4.2) umfasst, wobei der Schirm (12) gegenüber einer ersten (4.1) dieser Seiten angeordnet ist und die reflektierenden Flächen (14) überwiegend gegenüber der zweiten (4.2) dieser Seiten angeordnet sind.
  3. Leuchtvorrichtung (2) nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass jede der Lichtquellen (8) einer der Durchbrechungen (6) benachbart ist und im Wesentlichen in Richtung dieser Durchbrechung (6) leuchtet.
  4. Leuchtvorrichtung (2) nach Anspruch 3, dadurch gekennzeichnet, dass jeder der Durchbrechungen (6) jeweils wenigstens zwei der Lichtquellen (8) zugeordnet sind.
  5. Leuchtvorrichtung (2) nach einem der Ansprüche 3 und 4, dadurch gekennzeichnet, dass sich das Substrat (4) in einer Längsrichtung erstreckt, wobei jede der Durchbrechungen (6) einen Rand (6.1) umfasst, der sich quer zu dieser Richtung erstreckt, wobei die Lichtquelle oder die Lichtquellen (8), die der Durchbrechung (6) benachbart sind, entlang des Randes (6.1) angeordnet sind.
  6. Leuchtvorrichtung (2) nach Anspruch 5, dadurch gekennzeichnet, dass sich der Rand (6.1) jeder der Durchbrechungen (6) auf einem Abschnitt des Substrats (4) befindet, der eine Zunge (18) bildet.
  7. Leuchtvorrichtung (2) nach Anspruch 6, dadurch gekennzeichnet, dass jede der Zungen (18) von zwei Einschnitten (6.2) der entsprechenden Durchbrechung (6) beiderseits des entsprechenden Randes (6.1) gebildet wird.
  8. Leuchtvorrichtung (2) nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass die Durchbrechungen (6) entlang der Längsrichtung angeordnet sind und das Substrat (4) ein gekrümmtes Längsprofil aufweist.
  9. Leuchtvorrichtung (2) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Vorrichtung einen Träger (10) umfasst, an dem das Substrat (4) und der Schirm (12) befestigt sind, wobei der Träger (10) die reflektierenden Flächen (14) umfasst.
  10. Leuchtvorrichtung (2) nach Anspruch 9, dadurch gekennzeichnet, dass der Träger (10) vorstehende Abschnitte (10.2) umfasst, welche die reflektierenden Flächen (14) bilden und teilweise in die Durchbrechungen (6) hineinragen.
  11. Leuchtvorrichtung (2) nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass jede der reflektierenden Flächen (14) einen von der oder den entsprechenden Lichtquellen (8) entfernten ersten Abschnitt (14.1) und einen der oder den Lichtquellen (8) nahen zweiten Abschnitt (14.2) umfasst, wobei der zweite Abschnitt (14.2) eine mittlere Neigung bezüglich der Durchbrechung (6) aufweist, welche stärker als eine mittlere Neigung des ersten Abschnitts (14.1) bezüglich der Durchbrechung ist.
  12. Leuchtvorrichtung (2) nach Anspruch 11, dadurch gekennzeichnet, dass jeder der vorstehenden Abschnitte (10.2) einen Vorsprung (14.3) zwischen dem ersten und dem zweiten Abschnitt (14.1, 14.2) der entsprechenden reflektierenden Fläche (14) aufweist.
  13. Leuchtvorrichtung (2) nach einem der Ansprüche 11 und 12, dadurch gekennzeichnet, dass der erste und der zweite Abschnitt (14.1, 14.2) jeder der reflektierenden Flächen (14) jeweils ein konkaves gekrümmtes Profil aufweisen.
  14. Leuchtvorrichtung (2) nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die Vorrichtung außerdem eine Steuereinheit (26) der Lichtquellen (8) umfasst, die derart ausgelegt ist, dass wenigstens zwei der Quellen unterschiedliche Sollwerte der Lichtstärke empfangen.
  15. Leuchtvorrichtung (2) nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die Vorrichtung außerdem eine Steuereinheit (26) der Lichtquellen (8) umfasst, die dafür ausgelegt ist, die Lichtquellen schrittweise eine nach der anderen in einer vorgegebenen Richtung einzuschalten, um eine so beleuchtete Fläche des Schirms zu modulieren.
  16. Leuchtvorrichtung (2) nach Anspruch 15, dadurch gekennzeichnet, dass die Steuereinheit (26) dafür ausgelegt ist, auch die Lichtquellen, die sich an einem Ende der beleuchteten Fläche befinden, welches bezüglich der vorgegebenen Richtung zu den eine nach der anderen eingeschalteten Lichtquellen entgegengesetzt ist, schrittweise eine nach der anderen auszuschalten, um die so beleuchtete Fläche des Schirms zu verschieben.
EP18193052.0A 2017-09-12 2018-09-06 Beleuchtungsvorrichtung mit geringer dicke und homogener ausleuchtung Active EP3467375B1 (de)

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FR1758443A FR3071039B1 (fr) 2017-09-12 2017-09-12 Dispositif lumineux a faible epaisseur et eclairage homogene

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JP2020085977A (ja) * 2018-11-17 2020-06-04 アルパイン株式会社 表示装置

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Publication number Priority date Publication date Assignee Title
FR2697485B1 (fr) * 1992-11-02 1995-01-20 Valeo Vision Feu de signalisation à éléments lumineux modulaires, pour véhicule automobile.
US7086765B2 (en) * 2004-03-25 2006-08-08 Guide Corporation LED lamp with light pipe for automotive vehicles
CN101529156B (zh) * 2006-10-16 2012-03-21 皇家飞利浦电子股份有限公司 照明设备
US8562190B2 (en) * 2010-12-30 2013-10-22 Toyota Motor Engineering & Manufacturing North America, Inc. Rear lamp assembly
US10030863B2 (en) * 2011-04-19 2018-07-24 Cree, Inc. Heat sink structures, lighting elements and lamps incorporating same, and methods of making same
JP6166104B2 (ja) * 2012-06-08 2017-07-19 エルジー イノテック カンパニー リミテッド ランプユニット及びそれを用いた車両
DE102012221385A1 (de) * 2012-11-22 2014-05-22 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für ein Kraftfahrzeug
US9457707B2 (en) * 2014-09-15 2016-10-04 Nissan North America, Inc. Vehicle auxiliary lamp unit
US10077896B2 (en) * 2015-09-14 2018-09-18 Trent Neil Butcher Lighting devices including at least one light-emitting device and systems including at least one lighting device

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US10551025B2 (en) 2020-02-04
CN109506199A (zh) 2019-03-22
EP3467375A1 (de) 2019-04-10
FR3071039B1 (fr) 2019-08-30
CN109506199B (zh) 2022-03-11
US20190078752A1 (en) 2019-03-14
FR3071039A1 (fr) 2019-03-15

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