• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a light module (2), in particular for a motor vehicle, comprising a first light source (14) of the electroluminescence diode type and a second surface source of light (8) of the organic electroluminescence diode type suitable for reflect the light rays emitted by the first light source (14) to form a light beam along an optical axis of the module. The module (2) further comprises a collimator (12) capable of deflecting the light rays emitted by the first source (14) in a main direction and meeting the second light source (8) with an angle of incidence β no no.
    公开号:FR3025858A1
    申请号:FR1458668
    申请日:2014-09-15
    公开日:2016-03-18
    发明作者:Boubacar Sagna；David Hue；Hui Jin；Christophe Dubosc
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to the field of lighting and / or light signaling, in particular for a motor vehicle. More specifically, the invention relates to the field of lighting and light signaling by means of electroluminescence diodes (LEDs) and organic electroluminescence diodes (OLEDs). The published patent document FR 2 956 468 A1 discloses (FIG. 4) a light module for a motor vehicle, comprising a first surface light source of the OLED type and a second light source which is also surface-type and of the OLED type. The two OLED diodes are arranged parallel to each other, the rays emitted by the first towards the second being reflected by the latter in order to form a light beam. For this purpose, the rays reflected by the second diode pass through the first diode to form the light beam. The second light source thus provides a dual function, namely a first reflective surface function and a second illumination function. Indeed, the second diode can be powered independently of the first while ensuring its reflection function of the rays emitted by the first. The light rays emitted by the two diodes can thus be emitted independently and complement each other. The light module of this teaching is therefore interesting in that it makes it possible to complete a light beam produced by one of the sources by the light beam of the other source. However, it has the disadvantage that a large part of the rays emitted and / or reflected by the second diode must pass through the first diode. The fact of having to cross the first diode causes significant losses of light. The object of the invention is to propose a light module which overcomes at least one of the drawbacks of the prior art, more particularly of the aforementioned prior art. More particularly, the invention aims to provide a light module provided with a surface light source, such as an OLED diode, and to provide several lighting and / or signaling functions effectively. The subject of the invention is a light module, in particular for a motor vehicle, comprising: a first light source of the semiconductor type; a second light-emitting surface source of the organic electroluminescence diode type capable of reflecting the light rays emitted by the first light source in order to form a light beam along an optical axis of the module; remarkable in that it further comprises an optical device adapted to deflect the light rays emitted by the first light source in a main direction, said rays meeting the second light source with an angle of incidence 13 non-zero. Advantageously, the optical device is arranged so as to deflect the light rays emitted by the first light source so that its rays reach a part, for example a lower part, only of the second surface source. The second light-emitting surface source of the organic electroluminescence diode type is reflective. Advantageously, it consists of a superposition of several organic semiconductor layers between two electrodes of which one is transparent and the other is reflective. The reflecting electrode is arranged at the rear relative to the direction of propagation of the light beam along the optical axis. According to an advantageous embodiment of the invention, the optical device comprises a translucent or transparent element forming at least one, preferably two, diopter (s). According to an advantageous embodiment of the invention, the optical device is a collimator.
    [0002] According to an advantageous embodiment of the invention, the first light source consists of one or more electroluminescence diodes. The or each of these sources has a main surface of less than 30 mm 2, or even less than 5 cm -1. The second light surface source has a main surface greater than 100 mm 2. According to an advantageous embodiment of the invention, the electroluminescence diode (s) of the first light source illuminate in a half-space delimited by a mean plane forming an angle α of less than 70 °, preferably less than 60 °, more preferably less than 50 °, with the perpendicular to the mean plane of the corresponding second light source.
    [0003] According to an advantageous embodiment of the invention, the angle of incidence R of the rays coming out of the optical device with the second light source is greater than 10 °, preferably 15 °, more preferably 20 °. According to an advantageous embodiment of the invention, the optical device is optically disposed between the first and second light sources. According to an advantageous embodiment of the invention, the second light source forms an angle y with a direction perpendicular to the optical axis of the module, which is between 3 ° and 30 °, preferably between 5 ° and 25 °, more preferably between 8 ° and 20 °.
    [0004] According to an advantageous embodiment of the invention, the second light source is inclined in the direction of the light beam with respect to a direction perpendicular to the optical axis of the module. According to an advantageous embodiment of the invention, the light beam formed by reflection on the second light source is a first beam, the second light source being able to produce a second light beam. Advantageously, the first and second beams each perform part or even all of a separate photometric regulatory function. As a variant, the first and second beams may together perform a regulatory photometric function. According to an advantageous embodiment of the invention, the first beam corresponds to a brake signaling function for a motor vehicle and / or the second beam corresponds to a position signaling function for a motor vehicle. According to an advantageous embodiment of the invention, the second light source extends transversely to the optical axis of the module beyond the first light source. According to an advantageous embodiment of the invention, the second light source comprises two organic electroluminescence diodes extending transversely to the optical axis in generally opposite directions and inclined in the direction of the light beam with respect to a direction perpendicular to the optical axis of the module.
    [0005] According to an advantageous embodiment of the invention, the first light source comprises two sets of point electroluminescence diodes, each set being arranged to illuminate one of the two surface organic electroluminescence diodes, respectively.
    [0006] According to an advantageous embodiment of the invention, the two sets of diodes of the first light source are arranged, respectively on two walls inclined with respect to the optical axis so as to form a cavity with a forward-facing opening of the module, the module comprising a third light source disposed in said cavity and adapted to form an additional light beam.
    [0007] According to an advantageous embodiment of the invention, the optical device is a first optical device, the module comprising a second optical device in the cavity, able to deflect the light rays emitted by the third light source along the optical axis in order to form the additional light beam. According to an advantageous embodiment of the invention, the additional light beam 15 corresponds to a steering indication function for a motor vehicle. According to an advantageous embodiment of the invention, the second light source comprises several light zones that can be powered independently. The invention also relates to a light device, including lighting and / or signaling, for a motor vehicle, comprising: a housing; a light module 20 housed in the housing; remarkable in that the light module is in accordance with the invention. Advantageously, the light device comprises several light modules according to the invention. The measurements of the invention are interesting in that they make it possible to efficiently exploit the reflection property of an OLED type surface diode. They thus make it possible to complete, via this reflection effect, a light beam emanating from an OLED diode by a complementary beam emitted by point diodes of the LED type. The light beam produced by reflection on the second light source must not pass through a semi-reflecting surface, as in the above-mentioned state of the art.
    [0008] Other features and advantages of the present invention will be better understood from the description and drawings in which: FIG. 1 is a perspective view of a light module in accordance with FIG. invention; Figure 2 is a front view of the module of Figure 1; FIG. 3 is a perspective view of the module of FIGS. 1 and 2, the module being devoid of its collimators; FIG. 4 is a view of the module of FIG. 3 according to another perspective angle; FIG. 5 is a representation of one of the collimators of the module of FIGS. 1 to 4; FIG. 6 is a profile view of the module of FIGS. 1 to 4, illustrating the path of a light beam; FIG. 7 is a front view of one of the light sources of the OLED type 15 of the module of FIGS. 1 to 4. FIGS. 1 and 2 illustrate a light-signaling module for a motor vehicle. The module 2 is configured to be housed in a housing disposed at the rear of the vehicle. It is configured to provide a lantern (or taillight) function, a brake light function and a direction indicator (or flashing) function. The module 2 comprises a substrate 4 provided with a central portion 41, two side walls 42, two end walls 43 projecting from the side walls 42, two supports 44 and a rear portion 45. The rear portion 45 is configured to cooperate with a power supply connector 6. The two sidewalls 42 form a cavity housing light sources (not visible in FIGS. 1 and 2) and a collimator 10 for forming a light beam for a direction indicator function. The supports 44 are arranged to protrude from the central portion 41 of the substrate 4 substantially opposite to each other. Each of these supports 44 supports a surface diode of OLED type 8.
    [0009] An OLED is a light emitting diode comprising a superposition of several organic semiconductor layers between two electrodes of which one is transparent. The substrate 4 of the module also supports one or more light sources (not visible in FIGS. 1 and 2) between the lateral walls 42 and the OLED diodes 8, this or these light sources being covered by a collimator 12 in order to ensure a stoplight function. More precisely, the rays emitted by these light sources are deflected by the collimator 12 to meet the front face of the corresponding OLED diode 8 and be reflected towards the front of the module.
    [0010] The longitudinal axis of the module shown in FIG. 1 corresponds to its optical axis. This means that the different light beams produced by the module 2 are oriented substantially along this axis. All these beams are preferably directed towards the front of the module (corresponding to the right in Figure 1 and the rear of the vehicle).
    [0011] The collimators 10 and 12 are transparent or translucent material parts, such as glass or polycarbonate (PC) or polymethylmethacrylate (PMMA). They include input and / or output surfaces oriented to deflect the spokes along a main direction, applying the Snell-Descartes refractive principle. The inlet and outlet faces each form a diopter, namely a surface separating two homogeneous transparent and isotropic media of different refractive indices. The refractive index of air is in fact of the order of 1 while that of glass and polycarbonate is between about 1.4 and 1.6. The operating principle of a collimator is well known to those skilled in the art; it is therefore not necessary to detail it further. The substrate 4 is made of plastic material produced by molding and supports light sources and electric tracks, in accordance with the MID (acronym for "Molded Interconnect Device") technology. FIGS. 3 and 4 illustrate the light module of FIGS. 1 and 2, the module being however devoid of collimators 10 and 12, and OLED diodes 8.
    [0012] FIG. 3 shows the LEDs 14 (previously mentioned in relation with FIGS. 1 and 2) disposed between the lateral walls 42 and the supports 44 of the substrate 4. More precisely, these LEDs 14 are arranged directly on the rear face of the upper side wall 42 so as to illuminate in the direction of the corresponding OLED diode. The LEDs 14 are distributed transversely to the optical axis so as to illuminate essentially the entire width of the corresponding OLED diode. Similarly and symmetrically, LED diodes of the same type are arranged on the rear face of the lower side wall 42.
    [0013] FIG. 4 shows the LEDs 16 (also mentioned previously with reference to FIGS. 1 and 2) disposed in the bottom of the cavity formed by the side walls 42. These diodes 16 are oriented so as to illuminate in the direction of the optical axis. They are distributed transversely to the optical axis so as to occupy the space of the cavity.
    [0014] The diodes 14 and 16 are preferably bonded to the substrate 4. In fact, because of the thermoplastic nature of the substrate, the use of conventional soldering processes for the electrical contacts is not suitable. The diodes are thus mechanically and electrically fixed by applying a polymer-based glue and loaded with metal elements. It is thus a so-called "cold" application process that does not harm the substrate. After polymerization of the glue, it ensures the mechanical and electrical fixing of the diode. Electrical tracks are deposited directly on the substrate for the power supply of the diodes 14 and 16. The electrical tracks can be made by the technology designated by the acronym LDS meaning in English "Laser Direct Structuring". This involves running a laser beam on the corresponding surface of the substrate, according to the configuration of the tracks to be made. The laser beam has the effect of forming a roughness capable of promoting attachment. This step is followed by a metallization by dipping the substrate in one or more successive metal baths.
    [0015] Alternatively or in a complementary manner, the electric tracks may be made by ink jet printing, the ink of which comprises metallic particles.
    [0016] The tracks can also be made by a two-stage molding of the substrate, or else designated "Two shot molding" in the English language. This is an injection molding process using two different resins where only one of the two resins is metallizable. Typically, the metallizable resin is ABS and the non-metallizable resin is polycarbonate. The substrate is then subjected to an auto-catalytic deposition process where butadiene is used to chemically roughen the surface and allow adhesion of a primary layer of copper. FIG. 5 illustrates the collimator 12 intended to be arranged optically between the LEDs 14 (FIG. 3) and the OLED diodes 8 (FIGS. 1 and 2). As mentioned above, the collimator 12 consists of an element made of transparent or translucent material, such as for example polycarbonate. Such an element can thus be produced by molding. In this case, the collimator comprises a series of generally conical portions 121 intended to be aligned with the diodes. Each of these portions 121 comprises at its free end and of reduced section a cavity forming an inlet face 122 for the light emitted by the diodes. These input faces 122 thus form first diopters deviating the rays emitted by the diodes so as to make them less divergent. These spokes then propagate in a beam corresponding essentially to the shape of the conical portions 121. The collimator 12 also comprises facets 123 forming exit faces. These exit faces thus form second diopters that can deflect the rays a second time. These facets 123 may be oriented so as to locally control the direction of the rays exiting the collimator. The orientation of the facets 123 may vary along the length and width of the collimator 12 so as to form the most homogeneous light beam possible. FIG. 6 is a side view of the central and upper part of the light module of FIGS. 1 to 4. The path of a ray emitted by one of the LED diodes illuminating one of the OLED diodes is represented therein. The spoke 18 is deflected a first time when it penetrates the transparent or translucent material of the collimator 12. This deviation is not visible given the proximity between the diode 14 and the corresponding input face of the collimator 12. ray propagates essentially in a straight line in the material of the collimator until it reaches the exit face, in this case an exit lip 123. The ray 18 is then deflected a second 3025858 9 times so as to be directed to a portion of the corresponding OLED diode 8 which is close to the central portion 41 of the substrate 4. In other words, the rays emitted by the diodes 14 are deflected by the collimators 12 so as to meet the corresponding OLED diodes 8 in FIG. areas of said diodes which are close to the optical axis. As mentioned above, the OLED diodes 8 consist of a superposition of several organic semiconductor layers between two electrodes of which one is transparent. In this case, the electrode located at the rear is reflective so that, on the one hand, the light emitted by the semiconductor layers is effectively directed forward, and on the other hand, the rays emitted by the LEDs 14 towards the OLED diodes 8 are reflected. The electrode located at the front can therefore be totally or at least predominantly transparent. Still with reference to FIG. 6, the LEDs 14 illuminate in a half space delimited by the rear face of the side wall 42 on which these diodes are mounted. This mounting face of the diodes forms a mean plane which forms an angle with the perpendicular to the mean plane of the corresponding OLED diode, this angle being less than 70 °, preferably 60 °, more preferably 50 °. This upper limit of the angle a makes it possible, thanks to the collimator, to illuminate a useful portion of the OLED diode. This angle a is also preferably greater than 20 °, preferably 30 °, more preferably 40 °. This lower limit of the angle a makes it possible, moreover, to ensure reflection of the rays by the OLED diode in a direction corresponding to the optical axis of the module. The LEDs 14, the collimator 12 and the OLED diode 8 can thus be configured so that the angle of incidence 13 of the rays emerging from the collimator 12 is between 10 ° and 40 °, preferably between 15 ° and 15 °. 35 °, more preferably between 15 ° and 30 °. The OLED diodes 8 advantageously form an angle y with a direction perpendicular to the optical axis of the module, this angle y may be between 3 ° 30 and 30 °, preferably between 5 ° and 25 °, more preferably between 8 ° and 20 ° °. The OLED diodes 8 are also inclined forwardly. The angle y is greater than 0, preferably 3 °, so as to allow the formation of the light beam 3025858 10 corresponding to the radius 18. This angle is also limited so that the light beam produced by the light rays 20 emitted OLED diodes 8 are not too divergent with respect to the optical axis. The light beam produced by reflection of the rays 18 of the LEDs 14 can thus be produced independently of the activation of the OLED diodes 8. In other words, the light beam of the LEDs 14 can be added to the light beam produced. FIG. 7 illustrates an example of an OLED surface diode for the module of FIGS. 1 to 6. It can be seen that the diode 8 comprises two illuminating zones, namely a first zone 81 and a second zone 82. Each of these zones can be activated. independently. The module that has just been described can thus provide several light signaling functions. In this case, the central portion comprising the LEDs 16 and the collimator 10 housed in the cavity of the substrate 4 can provide a direction indicator function (flashing). The OLED surface diodes 8 can provide a position signaling function (lantern). The LEDs 14 with the collimators 12 and the reflection property of the OLED diodes 8 can provide a braking indication function (stop function). Indeed, the regulatory requirements in terms of photometry are higher for the stop function than 20 for the lantern function. The presence of several diodes 14, more particularly on either side of the optical axis, and the reflection quality of the surface diodes 8 makes it possible to achieve these requirements.
    权利要求:
    Claims (17)
    [0001]
    REVENDICATIONS1. Light module (2), in particular for a motor vehicle, comprising: - a first light source (14) of the semiconductor type; a second light-emitting surface source (8) of the organic electroluminescence diode type capable of reflecting the light rays emitted by the first light source (14) in order to form a light beam along an optical axis of the module; characterized in that it further comprises: an optical device (12) adapted to deflect the light rays emitted by the first light source (14) in a main direction and encountering the second light source (8) at an angle of incidencep not zero.
    [0002]
    2. The light module (2) according to claim 1, characterized in that the optical device (12) comprises a translucent or transparent element forming at least one, preferably two, diopter (s) (122, 123).
    [0003]
    3. Light module (2) according to one of claims 1 and 2, characterized in that the optical device is a collimator (12).
    [0004]
    4. Light module (2) according to one of claims 1 to 3, characterized in that the first light source consists of one or more electroluminescence diodes (14).
    [0005]
    5. Light module (2) according to claim 4, characterized in that the electroluminescence diode (s) (14) of the first light source illuminate in a half-space delimited by a plane forming an angle α of less than 70 °, preferably less than 60 °, more preferably less than 50 °, with the perpendicular to the mean plane of the second light source (8).
    [0006]
    6. Light module (2) according to one of claims 1 to 5, characterized in that the angle of incidence 13 of the rays coming out of the optical device (12) with the second light source (8) is greater than 10 ° preferably 15 °, more preferably 20 °. 3025858 12
    [0007]
    Light module (2) according to one of Claims 1 to 6, characterized in that the optical device (12) is arranged optically between the first and second light sources (14,
    [0008]
    8). 8. Light module (2) according to one of claims 1 to 7, characterized in that the second light source (8) forms an angle y with a direction perpendicular to the optical axis of the module, which is between 3 ° and 30 °, preferably between 5 ° and 25 °, more preferably between 8 ° and 20 °.
    [0009]
    9. Light module (2) according to one of claims 1 to 8, characterized in that the light beam formed by reflection on the second light source (8) is a first beam, the second light source (8) being adapted to produce a second light beam.
    [0010]
    10. Light module (2) according to claim 9, characterized in that the first beam corresponds to a brake signaling function for a motor vehicle and / or the second beam corresponds to a position signaling function for a motor vehicle.
    [0011]
    11. Light module (2) according to one of claims 1 to 10, characterized in that the second light source (8) extends transversely to the optical axis of the module beyond the first light source (14) .
    [0012]
    Light module (2) according to one of claims 1 to 11, characterized in that the second light source (8) comprises two organic electroluminescence diodes extending transversely to the optical axis in generally opposite and inclined directions. in the direction of the light beam with respect to a direction perpendicular to the optical axis of the module.
    [0013]
    13. Light module (2) according to claim 12, characterized in that the first light source comprises two sets of point electroluminescence diodes (14), each set being arranged to illuminate one of the two surface organic electroluminescence diodes (8). , respectively.
    [0014]
    14. Module light (2) according to claim 13, characterized in that the two sets of diodes (14) of the first light source are arranged respectively on two walls (42) inclined relative to the optical axis so as to forming a cavity with an opening directed towards the front of the module, the module (2) comprising a third light source (16) disposed in said cavity and adapted to form an additional light beam.
    [0015]
    15. Light module (2) according to claim 14, characterized in that the optical device (12) is a first optical device, the module (2) 10 comprising a second optical device (10) in the cavity, able to deflect the light rays emitted by the third light source (16) along the optical axis to form the additional light beam.
    [0016]
    16. Light module (2) according to one of claims 14 and 15, characterized in that the additional light beam corresponds to a steering indication function for a motor vehicle.
    [0017]
    17. A lighting device, in particular a lighting and / or signaling device, for a motor vehicle, comprising: a housing; - a light module housed in the housing; Characterized in that the light module is according to one of claims 1 to 16.
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    同族专利:
    公开号 | 公开日
    EP2995851A1|2016-03-16|
    FR3025858B1|2016-12-09|
    US9869447B2|2018-01-16|
    CN105423207A|2016-03-23|
    CN105423207B|2019-12-06|
    US20160076729A1|2016-03-17|
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    法律状态:
    2015-09-30| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-18| PLSC| Search report ready|Effective date: 20160318 |
    2016-09-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-09-29| PLFP| Fee payment|Year of fee payment: 4 |
    2018-09-28| PLFP| Fee payment|Year of fee payment: 5 |
    2019-09-30| PLFP| Fee payment|Year of fee payment: 6 |
    2020-09-30| PLFP| Fee payment|Year of fee payment: 7 |
    2021-09-30| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1458668A|FR3025858B1|2014-09-15|2014-09-15|LUMINOUS MODULE WITH LED AND OLED DIODES|FR1458668A| FR3025858B1|2014-09-15|2014-09-15|LUMINOUS MODULE WITH LED AND OLED DIODES|
    EP15184350.5A| EP2995851A1|2014-09-15|2015-09-08|Light module with led and oled diodes|
    US14/853,223| US9869447B2|2014-09-15|2015-09-14|Light module with LED and OLED diodes|
    CN201510587280.5A| CN105423207B|2014-09-15|2015-09-15|Lighting module with LED diodes and OLED diodes|
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