• 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 subject of the invention is a light-emitting device for a motor vehicle, comprising a light guide mat (1) provided with optical decoupling zones (3), and a light generator capable of sending light towards the guide mat. from light. The light guide web (1) is locally covered with a light-absorbing material (6).
    公开号:FR3033199A1
    申请号:FR1551664
    申请日:2015-02-26
    公开日:2016-09-02
    发明作者:Juan Manuel Martinez；Eric Moisy；Manuel Joyanes；Mari-Carmen Marquez；Maria Del Carmen Montano；Jose-Maria Martos
    申请人:Valeo Iluminacion SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a vehicle light device comprising a light-guiding sheet. A preferred application of the invention is the field of automotive equipment for the production of luminous flux used to signal the presence of the vehicle and / or to illuminate a part of the vehicle environment. Thus, the vehicle light device according to the invention can be: - a motor vehicle lighting device in the strict sense, also called road lighting device; for example a headlamp, also called a headlamp, a signaling device, such as a direction indicator, a brake light, a town lamp, a night position lamp or a diurnal position lamp (also called a DRL), - A lighting device of the passenger compartment of the vehicle, such as a ceiling lamp or wall lamp. It is common to gather in a single package several lighting and / or signaling functions, so as to simplify the electrical wiring 20 of these various functions in a motor vehicle. In addition, the shape of the lighting and / or signaling lights plays a key role in the search for a style and an original aesthetic that will allow the motor vehicle to be recognized by far. To achieve these objectives, it is known to equip the vehicle with 25 light guides, also called guide sheets of light rays. When viewing a light guide mass or volume guide, the light being inside the guide spring according to Snell-Descartes law, according to the value of its angles of reflection and the indices of the different media. As illustrated in FIG. 1, a light guide 1 is illuminated by means of light rays 2. 3033199 2 Light can be reflected or refracted at the boundary between two different media depending on the value of their index n and n . According to the law of Snell-Descartes, the light beam changes direction passing from one medium to another. When, for a light beam 2, the angle e between the light beam and the normal to the surface between the medium of index n and the medium of index n 'exceeds a limit angle θm, the radius 2 is totally reflected in the initial medium n (Figure 1) with a loss of energy. As illustrated in FIG. 2, when the angle e is less than the limit angle θ 1, the radius 2 is partially refracted in the external medium of index n ', the other part being reflected in the middle of index n. This principle works perfectly when the outer surfaces of the light guide 1 surface or volume are perfectly homogeneous and polished. Any degradation of one of these surfaces, for example on a zone 3 by a treatment of graining, streaking, streaking, etc., causes the exit of the light by refraction at the lower surface of the guide (FIG. 3). , the yield decreasing rapidly because there is loss of energy according to the physical laws of the waveguides. To achieve decorations, it is sufficient to define a particular optical pattern, for example by a treatment described above and illustrated in Figure 3, so that the optical pattern is visible to an outside observer (Figure 4). Thus, the zone 3 constitutes an optical decoupling zone allowing the light rays 2 to be deflected and thus refracted towards the outside environment to exit the guide 1 and to propagate in an illumination direction. However, for an outside observer, the light guide 1 behaves in its lower faces like a mirror, which generates reflections and ghosting patterns within the guide 1, detracting from the good reading of the optical decoration patterns. This is in addition to the refracted beams which also come out of the light guide 1 (FIG. 5). The present invention aims to remedy these disadvantages. In particular, it proposes a lighting or signaling device for a motor vehicle that makes it possible to overcome these problems of undesired reflections and refractions. The invention thus relates to an automotive vehicle light device, comprising: a light guiding sheet provided with optical decoupling zones, and a light generator able to send the light towards the guiding sheet. light.
    [0002] In the device according to the invention, the light-guiding sheet is covered locally with a light-absorbing material. Thus, the presence of this light-absorbing material on one or more predetermined zones makes it possible to absorb the light rays on these zones where it is desired to avoid undesired reflections and refractions.
    [0003] According to one embodiment of the invention the material absorbs between 60% and 100% of the light rays which meet it, preferably at least between 90% and 100%. The light generator may comprise at least one semiconductor emitter element, in particular a light-emitting diode.
    [0004] The device may comprise a collimator and / or a light guide receiving light rays from the light source and returning them towards the light guide ply. The light generator can be integrated with the light guide web.
    [0005] The light-absorbing material may be an opaque material. The optical decoupling zones may be able to send the light in a direction different from the direction of light from the light generator. The optical decoupling zones may be capable of sending light 30 in a direction identical to the direction of light from the light generator. In a first embodiment, the optical decoupling zones may be disposed on a first face of the light guiding ply and the light absorbing material may be disposed over a second face of the ply web. light guide opposed to this first face. For example, the first face is the upper face of the guide ply and the opposite face is the lower face of the guide face. In a second embodiment, the optical decoupling zones may be arranged on the second face, in particular the lower face, of the light-guiding layer and the light-absorbing material may be arranged on the second face of the guide layer. of light, between the optical decoupling zones. In a third embodiment, the optical decoupling zones may be arranged on walls of the light-guiding layer, these walls being oriented so as to form an angle, in particular an angle of 900, with the first wall and the material. The light absorber 15 may be disposed on the whole of the second face of the light guide web. The invention also relates to a mold for a light guide for a motor vehicle light device, comprising at least a first part comprising at least one cavity, and at least a second part comprising at least a first and a second sub-part. parts, at least one of the first and second sub-parts comprises at least one cavity. At least one of the first and second parts is movable so that each of the subparts is able to come into successive contact with the first part. In addition, the invention has the following characteristics, considered alone or in combination: the cavity of the first part and the cavity of one of the first and second sub-parts come into contact to form a single imprint. The term "a single imprint" means that each cavity of each part may be filled at the same time and by the same injection port, the first part and one of the first and second sub-parts in contact along a joint plane, each cavity opening on said joint plane, - one of the first and second parts is rotatably mounted, - one of the first and second parts is movably mounted in translation, - 1 one of the first and second parts is fixedly mounted; the other of the first and second subparts is devoid of cavities; the first and second subparts each have at least one cavity; one of the first and second parts; of the mold comprises striations, - the striations protrude from the surface of said mold part and towards the other part of the mold, - the other of the first and second sub-parts comprises the streaks, - the two sub-parts The first comprises at least one injection port intended to allow the cavity of the first part to be filled with material, at least one of the first and second sub-parts comprises at least one orifice. injection device for filling the cavity of one of the first and second sub-parts with material.
    [0006] The invention further relates to a method of molding a motor vehicle light device, using a mold of the present invention. It comprises the following steps: contacting the first part and one of the first and second sub-parts, first injection of material into the or each cavity of the first part, displacement of one of the first and second parts for contacting the first part and the other of the first and second sub-parts, - second injection of material in the or each cavity of the second part. Moreover, the invention has the following characteristics, considered alone or in combination: at least a first step of solidification of the material after the injection of material into the first impression, at least a second solidification step of the material after the injection of material into the second impression, the last step is a demolding step, the displacement of one of the first and second parts is a displacement in translation then in rotation then in translation. Other features and advantages of the present invention will emerge more clearly on reading the following description given by way of illustrative and nonlimiting example and with reference to the appended drawings in which: FIGS. 1 to 5, already described, , illustrate a guide web of a lighting or signaling device of the state of the art, - Figures 6 to 9 illustrate a lighting or signaling device 15 according to the invention, according to different modes of embodiment, and - Figures 10 to 14 illustrate different embodiments of a method of manufacturing a lighting or signaling device according to the invention. As illustrated in FIGS. 6a, 6b, 6c and 6a ', a lighting or signaling device according to the invention comprises a light generator, which comprises in this example a collimator 4, as well as a guiding layer. of light 1. The light rays 2 coming from the collimator 4 are emitted in the direction of the guide ply 1 along a horizontal axis x. Four possible examples of collimators 4 are illustrated in FIG. 6, each collimator 4 being able to be provided with at least one light source 5, such as a light-emitting diode. The light collimated by the collimator 4 enters the guide ply 1. The guide ply 1 is provided with zones 3 of optical decoupling, in particular zones 3 of diffractive optical decoupling, allowing the light rays 2 to be deflected and thus to be refracted towards the outside environment to exit the guide web 1 and propagate in an illumination direction. Zones 3 optical decoupling can be obtained for example by graining, streaking, or by the use of 3033199 7 optical beads or inclined facets, including micro-prism type. The decoupling elements of the zones 3, such as the facets or ridges, form reflective surfaces and are oriented so as to reflect transversely the light rays propagating along the guide ply 1, so that they come out. of the web 1 and propagate in the main direction of illumination. The light rays 2, running from right to left in the direction indicated by the arrows, thus emerge from the guide ply 1 at the same time through the left end of the ply 1, so as to obtain the desired photometric grating 10, and by the optical decoupling zones 3, so as to confer a light signature and a graphic appearance to the lighting or signaling device. According to the invention, the guide ply 1 is covered locally, for example on one or more external zones of the ply 1, 15 of a light-absorbing material 6, typically an opaque material. The opaque material 6 absorbs the light rays in areas where it is desired to avoid undesired reflections and refractions. Four possible embodiments of the guide ply 1 are illustrated.
    [0007] In a first embodiment illustrated in FIG. 6a, the optical decoupling zones 3 are arranged horizontally on the upper face of the ply 1. The opaque material 6 is disposed on the whole of the lower face of the ply 1. Thus, the light rays 2 which are directed towards the bottom of the ply 1 are absorbed by the material 6, which makes it possible to avoid spurious reflections and refractions of these rays 2. In a second embodiment illustrated in FIG. 6b, the optical decoupling zones 3 are arranged horizontally on the lower face of the sheet 1, for example at regular intervals. The opaque material 6 is disposed on the lower face of the sheet 1, between the optical decoupling zones 3, which makes it possible to absorb the light rays 2 between the optical decoupling zones 3. In a third embodiment illustrated in FIG. 6c, the optical decoupling zones 3 are arranged vertically on vertical walls of the guide ply 1, which is, for example, shaped as steps. The opaque material 6 is disposed on the whole of the lower face of the sheet 1, and the light rays 2 which are directed towards the bottom of the sheet 1 are absorbed by the material 6.
    [0008] In a variant of the first embodiment, illustrated in FIG. 6a ', the light source 4 may be part of the guide ply 1. It is thus possible to envisage any combination of a guide ply 1 according to one of of the first three embodiments with any collimator 4.
    [0009] FIG. 7 thus illustrates an embodiment in which the collimator 4 is of cylindrical shape and the decoupling zones 3 are arranged in an inclined manner on the upper face of the guide ply 1. The opaque material 6 is disposed on the set of the lower face of the sheet 1, and the light rays 2 which are directed towards the bottom of the sheet 1 15 are thus absorbed by the material 6. In the embodiment illustrated in FIG. 8, the collimator 4 is cylindrical shape and the optical decoupling zones 3 are arranged horizontally on the upper face of the sheet 1, the opaque material 6 being arranged on the whole of the lower face of the sheet 1.
    [0010] In the embodiment illustrated in FIG. 9, the web 1 of the embodiment illustrated in FIG. 7 is taken again, but this time the collimator 4 is integrated with the guide sheet 1, the device thus being in a single element. . The remainder of the description is devoted to different examples of a method of manufacturing the lighting or signaling device.
    [0011] The process typically comprises two injection phases, namely an injection phase during which the light-absorbing material is injected, and an injection phase during which the constituent material of the light-guiding layer is injected. . Figure 10 illustrates a first embodiment of the method. An injection mold 7 is used, which comprises a first portion 91 comprising two cavities 913 and a second portion 81 which is a mold core. The first lower portion 91 is fixed, while the core 81 is rotatable about a vertical axis of rotation. The core 81 comprises a first sub-part 811 and a second sub-part 812. Before the first injection phase, the first sub-part 811 comes into contact with the first part 91 along the joint plane (P). Then an opaque material 6 is injected through an injection port into the dedicated cavities 913 of the first part 91, the first sub-part 811 being full so as to direct the injection into the first part 91. translation-rotation-translation of the core 81 so that the second sub-portion 812 of the core 81 is brought into contact with the first portion 91 before the second injection phase. The second sub-portion 812 of the core 81 has a cavity 814 of shape corresponding to that of the guide ply 1. The cavities 913 with the cavity 814 then form a single cavity, that is to say all the cavities 913 and 814 could be filled with material at the same time through a single injection port taken from the injection ports of the mold if these cavities 814 and 913 were empty. Each optical decoupling zone 3 is obtained by means of optical decoupling patterns such as ridges or teeth 10. These ridges or teeth 10 are obtained by means of complementary patterns 914, which project from the upper surface 915. of the first portion 91 of the mold, i.e. located above the upper surface 915 of the first portion 91. Then a transparent material is injected through an injection port into the cavity 814 of the core 81 in order to form the light guide 1. The transparent material is thus overmolded onto the opaque material 6, in other words at least a portion of the opaque material 6 is in contact with the light guide 1. At the end of the second injection, once the mold 7 removed, the molded product is obtained by demolding. In a preferred embodiment, the first sub-portion 811 of the core 81 includes a cavity 813 to thereby prevent crushing of the complementary patterns 914 when the first portion 91 and the first sub-portion are contacted. Part 811. In a second embodiment, as illustrated in FIG. 11, in which elements identical to those of FIG. 10 bear the same references, the method is identical to that of the first embodiment in FIG. except that the teeth 10 are located under the upper surface 915 of the first portion 91. The cavity 813 of the first sub-portion 811 of the second portion 81 of the mold 7 is then no longer necessary.
    [0012] In a third embodiment, as shown in Figure 12, the first portion 82 of the mold 7 or core 82 is fixed, while the second portion 92 of the mold 7 is rotatable about a vertical axis. The first portion 82 has a cavity 814 of a shape corresponding to that of the guide ply 1. Each optical decoupling zone 3 is obtained by means of optical decoupling patterns such as ridges or teeth 10. These striations or these teeth 10 are obtained by means of complementary patterns 914, which project from the upper surface 925 of the first sub-portion 921 of the mold 7, that is to say located above the upper surface 925 of the first subpart 921.
    [0013] Before the first injection phase, the first sub-part 921 comes into contact with the first part 82 along the joint plane (P). Then a transparent material is injected through an injection orifice into the dedicated cavity 814 of the first part 82, the first sub-part 921 being full so as to direct the injection into the first part cavity 82.
    [0014] The second part 92 is then translated-rotated-translation so that the second sub-portion 922 is brought into contact with the first part 82 before the second injection phase. The cavities 923 with the cavity 814 then form a single cavity, that is to say all the cavities 923 and 814 could be filled with material at the same time thanks to a single and same injection orifice taken from the orifices. injections of the mold if these cavities 814 and 913 were empty. This allows an injection of an opaque material 6 into dedicated cavities 923 of the second sub-portion 922. The opaque material 6 is molded onto the transparent material, in other words at least a portion 30 of the opaque material 6 is in contact with the light guide 1. The cavity 814 of the first part being filled because of the first injection, the second injection is thus directed towards the cavities 6 of the second sub-part 922.
    [0015] After the injection process, once the mold 7 has been removed, the product molded by demolding is obtained. In a fourth embodiment, as illustrated in FIG. 13, the method is identical to that of the third embodiment except that the teeth 10 are located under the upper surface 925 of the first subpart 921. as well as under the upper surface 925 of the second subpart 922. Fig. 14 illustrates a fifth embodiment. This embodiment differs from FIG. 13 in that the ridges / teeth 10 on the guide ply are in a cavity 10 'of the ply, that is to say set back from the lower face of this ply. this. In the first injection phase illustrated in FIG. 14, the first subpart of the second movable portion 92 comprises cavities 923; the cavity 10 'of the first portion 82, fixed, is surrounded by two plates 11, the width of each is greater than that of each cavity 923 of the first sub-portion 921 of the second part 92. Each plate 11 is intended next to each cavity 923 during the first injection phase, that is to say during the molding of the guide ply 1. Thus, the edges of each cavity 923 of the first subpart 921 of the second portion 92 of the mold 7 come into sealing contact with the corresponding plate 11. The cavity 10 'being between two plates 11, it will not be filled during the injection of the absorbent material into the cavities 923 of the mold part 92 (second injection phase).
    [0016] The advantage is that during the first injection phase, it is no longer necessary to have complementary ridges of the ridges 10 of the guide ply on the second portion 92 of the mold, as shown in FIGS. 12 and 13, to prevent the absorbent material overmoulding on these streaks. In a variant of the fifth embodiment, not shown, the first part 82 comprises at least two consecutive cavities 10 'separated by at least one plate 11.
    [0017] In a variant of the fifth embodiment, not illustrated, the second portion 92 includes as many cavities 923 as trays 11 of the first portion 82. Each embodiment may comprise a solidification step after one or each step. injection. This solidification step consists of waiting for a set time before moving on to the next step.
    权利要求:
    Claims (12)
    [0001]
    REVENDICATIONS1. Motor vehicle light device, comprising: - a light guiding layer (1) provided with optical decoupling zones (3), and - a light generator capable of sending light towards the light guiding layer (1). ), the device being characterized in that the light guide web (1) is locally covered with a light-absorbing material (6).
    [0002]
    2. Device according to claim 1, characterized in that the light generator comprises a light emitting diode (5).
    [0003]
    3. Device according to one of claims 1 to 2, characterized in that it comprises a collimator (4) and / or a light guide receiving the light rays of the light source (5) and returning them towards the light guiding layer (1).
    [0004]
    4. Device according to one of claims 1 to 3, characterized in that the light generator is integrated with the light guide web (1).
    [0005]
    5. Device according to one of claims 1 to 4, characterized in that the light-absorbing material (6) is an opaque material.
    [0006]
    6. Device according to one of claims 1 to 5, characterized in that the optical decoupling zones (3) are adapted to send the light in a direction different from the direction of the light from the light generator.
    [0007]
    7. Device according to one of claims 1 to 6, characterized in that the optical decoupling zones (3) are adapted to send the light in a direction identical to the direction of light from the light generator.
    [0008]
    8. Device according to one of claims 1 to 7, characterized in that the optical decoupling zones (3) are arranged on a first face 3033199 14 of the light guide ply (1) and in that the absorber material of light (6) is arranged on the assembly of a second face of the light-guiding layer opposite this first face (1). 5
    [0009]
    9. Device according to one of claims 1 to 7, characterized in that the optical decoupling zones (3) are arranged on the second face, in particular the lower face, of the light-guiding layer (1) and in that the light-absorbing material (6) is arranged on the second face of the light-guiding layer (1) between the optical decoupling zones (3).
    [0010]
    10. Device according to one of claims 1 to 7, characterized in that the optical decoupling zones (3) are arranged on the walls of the light guide ply (1), these walls being oriented so as to form a angle, in particular an angle of 900, with the first wall 15 and in that the light-absorbing material (6) is arranged on the whole of the second face of the light-guiding layer (1).
    [0011]
    11.Dispositif according to one of claims 1 to 10, characterized in that it is obtained by injection molding using a mold (7) comprising a first portion (81, 82) and a second part ( 91, 92), the second portion (91, 92) comprising receiving areas (913, 923) of the light absorbing material (6).
    [0012]
    12.Dispositif according to claim 11, characterized in that it is obtained by a method comprising an injection phase during which the light absorbing material (6) is injected, and an injection phase 25 during which one injects the constituent material of the light guide web (1).
    类似技术:
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    同族专利:
    公开号 | 公开日
    CN105927897B|2021-03-16|
    EP3062015B1|2020-07-29|
    US9851067B2|2017-12-26|
    FR3033199B1|2018-02-02|
    US20160252228A1|2016-09-01|
    EP3062015A2|2016-08-31|
    EP3062015A3|2016-10-26|
    CN105927897A|2016-09-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2013117755A1|2012-02-10|2013-08-15|Tp Vision Holding B.V.|Backlight device|
    CN1892345A|2005-07-05|2007-01-10|久禾光电股份有限公司|Lighting module group capable of eliminating bright spots|
    JP5191358B2|2007-12-06|2013-05-08|株式会社ジャパンディスプレイウェスト|Surface emitting device|
    US8400585B2|2008-07-10|2013-03-19|Omron Corporation|Surface light source device and liquid crystal display device|
    JP3176743U|2012-04-10|2012-07-05|株式会社クラレ|High-mount stop lamp for vehicles|
    DE102012221389B4|2012-11-22|2019-08-22|Automotive Lighting Reutlingen Gmbh|Motor vehicle light with a light guide and a visible through the light guide aperture|JP6744196B2|2016-10-31|2020-08-19|スタンレー電気株式会社|Vehicle lighting|
    US10576877B2|2017-03-24|2020-03-03|Honda Patents & Technologies North America, Llc|Illuminated grille|
    FR3066252B1|2017-05-15|2020-10-30|Automotive Lighting Rear Lamps France|LIGHTING DEVICE FOR A MOTOR VEHICLE SIGNAL LIGHT, PROMOTING THE PROPAGATION OF A GREATER QUANTITY OF LIGHT IN A LIGHT GUIDE|
    FR3070070A1|2017-08-14|2019-02-15|Koito Manufacturing Co., Ltd.|ROD-SHAPED LIGHT GUIDE AND VEHICLE LAMP|
    EP3553371A1|2018-04-12|2019-10-16|odelo GmbH|Lamp for motor vehicle lights comprising a plate like light guide and motor vehicle light equipped with the same|
    US11256018B2|2019-07-03|2022-02-22|Varroc Lighting Systems, s.r.o|Light assembly including an illuminating utility segment and a visual stimulant segment|
    法律状态:
    2016-02-29| PLFP| Fee payment|Year of fee payment: 2 |
    2016-09-02| PLSC| Publication of the preliminary search report|Effective date: 20160902 |
    2017-02-28| PLFP| Fee payment|Year of fee payment: 3 |
    2018-02-26| PLFP| Fee payment|Year of fee payment: 4 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 6 |
    2021-02-26| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1551664|2015-02-26|
    FR1551664A|FR3033199B1|2015-02-26|2015-02-26|LUMINOUS DEVICE OF A MOTOR VEHICLE|FR1551664A| FR3033199B1|2015-02-26|2015-02-26|LUMINOUS DEVICE OF A MOTOR VEHICLE|
    EP16156974.4A| EP3062015B1|2015-02-26|2016-02-23|Light device of a motor vehicle|
    US15/053,210| US9851067B2|2015-02-26|2016-02-25|Motor vehicle light device|
    CN201610109959.8A| CN105927897B|2015-02-26|2016-02-26|Motor vehicle lamp device|
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