• 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:
    A lighting device (DE) comprises: - a support plate (PS1) provided with light sources (SL), - a light guide (GL) of flat type and comprising a guiding part (PG) placed between rear (PR) and front (PV) parts, the rear part (PR) supplying photons with the guiding part (PG), and the front part (PV) delivering the guided photons to the outside, and - a supporting part (PS2) comprising first (F1) and second (F2) faces to which are fixedly secured the support plate (PS1) and the light guide (GL), and a transparent screen (ET) projecting on the second face (F2) in front of the front part (PV) and extending over a height strictly greater than the thickness of the light guide (GL) in order to be backlit by the photons delivered by the front part (PV) to ensure a predefined photometric function.
    公开号:FR3062453A1
    申请号:FR1750668
    申请日:2017-01-27
    公开日:2018-08-03
    发明作者:Rodolphe Peron；Michael Bore
    申请人:Peugeot Citroen Automobiles SA；
    IPC主号:
    专利说明:

    Holder (s): PEUGEOT CITROËN AUTOMOBILES SA Société anonyme.
    O Extension request (s):
    ® Agent (s): PEUGEOT CITROËN AUTOMOBILES SA Public limited company.
    ® LIGHT GUIDE LIGHTING DEVICE MOUNTED ON A SUPPORT PART INCLUDING A TRANSPARENT MAGNIFICATION SCREEN.
    FR 3 062 453 - A1
    @) A lighting device (DE) includes:
    - a support plate (PS1) fitted with light sources (SL),
    - a light guide (GL) of the flat type and comprising a guide part (PG) placed between rear (PR) and front (PV) parts, the rear part (PR) supplying the guide part (PG) with photons , and the front part (PV) delivering outside the guided photons, and
    - a support piece (PS2) comprising first (F1) and second (F2) faces to which the support plate (PS1) and the light guide (GL) are fixedly secured, and a transparent screen (ET) projecting from the second face (F2) in front of the front part (PV) and extending over a height strictly greater than the thickness of the light guide (GL) in order to be backlit by the photons delivered by the front part (PV) to ensure a predefined photometric function.

    i
    LIGHT GUIDE LIGHTING DEVICE MOUNTED ON A
    SUPPORT PART INCLUDING A TRANSPARENT SCREEN
    ENLARGEMENT
    The invention relates to lighting devices, and more specifically those which comprise at least one light source supplying photons with a light guide and which are intended to perform at least one photometric function.
    The term “lighting device” is understood here to mean a light device capable of ensuring at least one photometric function of lighting or signaling or of light effect, possibly decorative.
    In certain fields, such as, for example, that of vehicles, possibly of the automobile type, lighting devices are used comprising a support plate provided with at least one light source generating photons, and a light guide of the flat type and comprising a guide part placed between a rear part which supplies it with photons and a front part which delivers outside the photons which it has guided.
    The front part of a flat type light guide by definition having a small thickness, typically less than eight millimeters, we are forced to associate with it at least one added element when we want it to provide a photometric function requiring a illumination over a height significantly greater than this thickness. This is for example the case when the lighting device is intended to perform a brake light function.
    This added element is more specifically responsible for significantly increasing (or enlarging) the illumination height downstream of the front part of the light guide. It is usually a lens or a set of lenses or a screen.
    For this illumination height to comply with the rules defining the photometric function considered, the distance between the front part of the light guide and the added element must be equal to a predefined value. However, the element being attached, for example by clipping, the aforementioned distance is rarely equal to the predefined value because of the dimensional tolerances of manufacture and play.
    In addition, the attachment means of the insert are generally partially visible, and difficult to hide, which affects the perceived quality and / or any styling effect.
    The invention aims in particular to improve the situation.
    To this end, it proposes in particular a lighting device comprising a support plate provided with at least one light source suitable for generating photons, and a flat type light guide and comprising a guide part placed between rear parts. and front, this rear part being suitable for supplying the guide part with generated photons and this front part being suitable for supplying photons guided in the guide part to the outside.
    This lighting device is characterized by the fact that it also includes a support piece comprising:
    - first and second faces, to which the support plate and the light guide are fixedly and respectively fixed, and
    - a transparent screen protruding on this second face in front of the front part of the light guide, at a predefined distance, and extending over a height strictly greater than a thickness of the light guide at its front part in order to be backlit by the photons delivered by this front part over this height and according to a predefined intensity to ensure a predefined photometric function.
    This transparent screen forming an integral part of a support piece to which the support plate and the light guide are fixedly secured, there is no longer any problem of dimensional tolerance of manufacture and play, and therefore it is certain that the distance separating the front part of the light guide from the transparent screen is equal to a predefined value making it possible to fully ensure the predefined photometric function.
    The lighting device according to the invention may include other characteristics which can be taken separately or in combination, and in particular:
    - its support part can be produced by bi-injection of first and second materials. In this case, the first material defines a part of the support piece which does not include the transparent screen, and the second material defines the transparent screen;
    - The front part of the light guide may include a front face oriented towards the transparent screen and arranged so as to widen a beam of photons arriving at its level in a vertical direction;
    - the transparent screen can extend in front of the front part of the light guide over the entire length of this front part;
    - Its support piece may include at least one opening suitable for accommodating part of each light source;
    - each light source can be a light emitting diode;
    - its light guide can be made of polycarbonate (or PC) or poly methyl methacrylate (or PMMA).
    The invention also provides a vehicle optical unit, possibly of the automobile type, comprising at least one lighting device of the type of that presented above.
    The invention also provides a vehicle, possibly of the automotive type, and comprising at least one lighting device of the type presented above or at least one optical unit of the type presented above.
    Other characteristics and advantages of the invention will appear on examining the detailed description below, and the attached drawings (obtained in CAD / CAD (“Computer Aided Design / Computer Aided Drawing”), whence the apparently discontinuous nature of certain lines), on which:
    FIG. 1 schematically illustrates, in a longitudinal section view, an example of an optical unit comprising an example of an embodiment of a lighting device according to the invention,
    FIG. 2 schematically illustrates, in a perspective view, an example of a support plate provided with light sources and intended to be part of a lighting device of the type of that illustrated in FIG. 1,
    FIG. 3 schematically illustrates, in a perspective view, an example of a light guide intended to be part of a lighting device of the type of that illustrated in FIG. 1, and
    - Figure 4 illustrates schematically, in a perspective view, an example of support piece to which must be fixedly secured the support plate and light guide of Figures 2 and 3 to form a lighting device of the type illustrated Figure 1.
    The object of the invention is in particular to propose an ED lighting device intended to provide at least one photometric lighting or signaling or light effect function, possibly decorative.
    In what follows, it is considered, by way of nonlimiting example, that the lighting device DE is intended to equip an optical unit BO with a vehicle of automobile type, such as for example a car. But the invention is not limited to this application. Indeed, a DE lighting device can be an equipment per se (possibly including its own housing), or can be part of other equipment than a vehicle optical unit. Thus, a DE lighting device can be part of any vehicle (land, sea (or river), or air), of any installation, including of industrial type, of any device ( or system), and any building. In addition, a DE lighting device can provide interior or exterior lighting.
    Furthermore, it is considered in what follows, by way of nonlimiting example, that the optical unit BO (comprising at least one lighting device DE) is a rear light ensuring at least one photometric signaling function, such as for example a stop light function. But the invention is not limited to this application. Indeed, the lighting device DE, according to the invention, is a light device capable of ensuring at least one photometric function of lighting or signaling or light effect, possibly decorative. Thus, in the non-limiting case of a vehicle, it can participate in a photometric signaling function, such as for example a direction change indicator function, a position light function (or pilot light or even lantern), a reversing light function, position light function, daytime running light function (or DRL (or "Daytime running Light (or Lamp) >>" - light signal automatically switched on when the vehicle is operated during the day) ), or a welcome (or courtesy) function, or a photometric light effect function, possibly decorative (or ambience). Note that the optical unit BO could also be a headlight (or headlight).
    There is diagrammatically illustrated in FIG. 1, a part of an optical unit BO of the vehicle (here a rear light) comprising, in particular, a lighting device DE according to the invention.
    As illustrated, this optical unit BO comprises in particular a housing BB delimiting a part of a cavity housing a lighting device DE according to the invention, as well as possible other lighting means ensuring at least one other photometric function, and protective glass GP of glass or plastic.
    The BB box is intended, here, to be secured to a part of the body of a vehicle (here in a rear part). It is made of a rigid material, such as for example a plastic or synthetic material. In this case, it can be produced by molding.
    As illustrated in FIG. 1, a lighting device DE, according to the invention, comprises a support plate PS1 provided with at least one light source SL, a light guide GL and a support piece PS2.
    The support plate PS1 can, for example, be a printed circuit board, of the PCB (“Printed Circuit Board”) type, rigid or flexible (“of the“ Flex ”type). An example of such a support plate PS1 of the PCB type is illustrated without limitation in FIG. 2.
    Each light source SL is capable of generating photons intended for the light guide GL, preferably directly, as illustrated in FIG. 1.
    By way of example, each light source SL can be a light-emitting diode, of the conventional type (or LED ("Light-Emitting Diode >>)) or of the organic type (or OLED (" Organic Light-Emitting Diode >>) ), or a laser diode.
    The wavelength of the photons emitted by each light source SL depends on the photometric function which the lighting device DE must perform, on the color of the material in which the light guide GL is made and on the color of the material in which is made the transparent screen AND to which we will return later. For example, one can use a transparent crystal GL light guide and a transparent AND colored screen (for example red or orange), or a colored GL light guide (for example red or orange) and a transparent AND screen (for example crystal), or a light guide GL of color (for example red or orange) and a transparent screen AND of color (for example red or orange). Consequently, photons can have a wavelength corresponding to the color white or red or even orange, for example.
    It will be noted that in the example illustrated without limitation in FIG. 2, the support plate PS comprises thirty-four light sources SL. But the number of SL light sources can take any value greater than or equal to one.
    As illustrated without limitation in FIGS. 1 and 3, the light guide GL is of the flat type and comprises a guide part PG placed between a rear part PR and a front part PV.
    The rear part PR of the light guide GL receives the photons generated by each light source SL and is suitable for supplying the guide part PG with photons generated and received. To this end, the rear part PR can, for example and as illustrated without limitation in FIG. 1, have a tilted rear face (and possibly metallized) and intended to reflect the photons towards the guide part PG, in a general direction substantially parallel to the general direction of photon propagation in this guide part PG.
    The front part PV of the light guide GL is suitable for delivering outside (here upstream of the protective glass GP) photons which have been guided in the guide part PG.
    For example, the light guide GL can be made of polycarbonate (or PC) or poly methyl methacrylate (or PMMA).
    Furthermore, the thickness eg of the light guide GL, at least at the level of its front part PV, can, for example, be between 4 millimeters and 10 millimeters. For example, it can be 6 millimeters. In this case, the height of the photon (or light) beam delivered at the outlet of the end face of the front part PV is equal to this thickness eg of 6 millimeters.
    As illustrated without limitation in FIGS. 1 and 4, the support piece PS2 integrally includes first F1 and second F2 faces and a transparent screen AND (or cap).
    The support plate PS1 is fixedly secured to the first face F1 of the support piece PS2, preferably by screwing or bolting. But this fixed connection could also be done by gluing or clipping.
    The light guide GL is secured to the second face F2 of the support piece PS2, preferably by screwing or bolting. But this fixed connection could also be done by gluing or clipping. It will be noted that in the example illustrated without limitation in FIG. 3, the light guide GL comprises two fixing lugs PF provided with holes intended to be crossed by fixing screws suitable for joining them by screwing to the second face F2 of the support piece PS2.
    The transparent ET screen (or cap) is an integral part of the PS2 support part. More precisely, it projects on the second face F2 in front of the front part PV of the light guide GL, at a predefined distance, and extends over a height he which is strictly greater than the thickness eg of the light guide GL at the level of its front part PV in order to be backlit by the photons delivered by this front part PV over this height he and according to a predefined intensity to ensure a predefined photometric function.
    This transparent screen ET therefore makes it possible to significantly increase (or enlarge) the illumination height downstream of the front part PV of the light guide GL by passing it from the thickness eg to the height he. In order to obtain this increase (or this enlargement), it is particularly advantageous for the end face of the front part PV of the light guide GL to be arranged so as to "widen" (or "burst") a beam of photons reaching its level in the vertical direction. To this end, this end face, which is oriented towards the transparent screen ET, may include burst (or divergence) optical elements (such as, for example, billage).
    It will be understood that this predefined distance, which makes it possible to obtain the heights of illumination and the predefined intensity required for the predefined photometric function, is a function of the thickness eg, the number and the light intensity of the light sources. SL installed on the support plate PS1, and respective positions of these light sources SL with respect to the rear part PR of the light guide GL.
    The transparent screen ET now forming an integral part of a support piece PS2 to which are moreover fixedly fixed the support plate PS1 and the light guide GL, there is no longer any risk of having dimensional tolerance problems of manufacture and Consequently, it is certain that the distance which separates the front part PV of the light guide GL from the transparent screen ET and the distance which separates the light sources SL from the rear part PR of the light guide GL are equal to predefined values which allow the predefined photometric function to be fully ensured. In addition, the one-piece nature of the support piece PS2 (with its transparent ET screen) makes it possible to avoid having to design a mold dedicated to the manufacture of the latter (ET) and any dedicated mold release tools.
    In addition, as there is no longer any need for fixing means to immobilize the transparent screen ET, there is no longer any risk of harming the perceived quality and / or a possible effect of style.
    In addition, the transparent screen ET masks the light guide GL whose shape cannot participate in a possible style effect.
    For example, the support piece PS2 can be produced by biinjection of first and second materials. In this case, the first material defines a part of the support piece PS2 which does not include the transparent screen ET, and the second material defines the transparent screen ET. For example, the first material can be black polycarbonate (or PC), and the second material can be crystal or color polycarbonate (or PC).
    The color of the material in which the ET transparent screen is made depends on the photometric function to be performed and the color of the photons generated. For example, it can be "white crystal" or "red crystal".
    It will be noted that the transparent screen ET preferably extends in front of the front part PV of the light guide GL over the entire length of this front part PV. But this is not compulsory, especially when you want to obtain lighting with different heights.
    It will also be noted, as illustrated without limitation in FIGS. 1 and 4, that the support piece PS2 can comprise at least one opening OP suitable for accommodating a part of each light source SL, in order to allow the photons generated to reach the rear part PR of the light guide GL. In the example illustrated without limitation in FIG. 4, the support piece PS2 comprises a single opening OP housing part of is all the light sources SL, but it could include several openings OP housing part of one or more sources of light SL. Thus, one could possibly provide as many OP openings as SL light sources.
    ίο
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Lighting device (DE) comprising a support plate (PS1) provided with at least one light source (SL) capable of generating photons, and a light guide (GL) of the flat type and comprising a part guide (PG) placed between rear (PR) and front (PV) parts, said rear part (PR) being suitable for supplying generated photons said guide part (PG) and said front part (PV) being suitable for delivering outside of the photons guided in said guide part (PG), characterized in that it further comprises a support piece (PS2) integrally comprising i) first (F1) and second (F2) faces to which are secured fixedly and respectively said support plate (PS1) and said light guide (GL), and ii) a transparent screen (ET) projecting on said second face (F2) in front of said front part (PV) of the light guide (GL) , at a predefined distance, and extending over a strictly greater height greater than a thickness of said light guide (GL) at said front part (PV) in order to be backlit by said photons delivered by said front part (PV) at this height and at a predefined intensity to ensure a predefined photometric function .
    [2" id="c-fr-0002]
    2. Device according to claim 1, characterized in that said support piece (PS2) is produced by bi-injection of first and second materials, said first material defining a part of said support piece (PS2) which does not include said transparent screen (ET), and said second material defining said transparent screen (ET).
    [3" id="c-fr-0003]
    3. Device according to one of claims 1 and 2, characterized in that said front part (PV) of the light guide (GL) comprises a front face oriented towards said transparent screen (ET) and arranged so as to widen a beam of photons reaching its level in a vertical direction.
    [4" id="c-fr-0004]
    4. Device according to one of claims 1 to 3, characterized in that said transparent screen (ET) extends in front of said front part (PV) of the light guide (GL) over the entire length of this front part (PV) ).
    [5" id="c-fr-0005]
    5. Device according to one of claims 1 to 4, characterized in that said support piece (PS2) comprises at least one opening (OP) adapted to accommodate a part of each light source (SL).
    [6" id="c-fr-0006]
    6. Device according to one of claims 1 to 5, characterized in that 5 each light source (SL) is a light emitting diode.
    [7" id="c-fr-0007]
    7. Device according to one of claims 1 to 6, characterized in that said light guide (GL) is made of polycarbonate or polymethyl methacrylate.
    [8" id="c-fr-0008]
    8. Vehicle optical unit (BO), characterized in that it comprises at least one lighting device (DE) according to one of the preceding claims.
    [9" id="c-fr-0009]
    9. Vehicle, characterized in that it comprises at least one optical unit (BO) according to claim 8 and / or at least one lighting device (DE) according to one of claims 1 to 7.
    is
    [0010]
    10. Vehicle according to claim 9, characterized in that it is of the automobile type.
    1/2
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    同族专利:
    公开号 | 公开日
    CN108361651A|2018-08-03|
    FR3062453B1|2019-03-29|
    EP3354977A1|2018-08-01|
    引用文献:
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    FR2967235A1|2010-11-05|2012-05-11|Valeo Vision|LIGHTING OR SIGNALING DEVICE FOR A MOTOR VEHICLE HAVING A LIGHT GUIDE RAIL.|
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    FR3106651B1|2020-01-27|2022-02-11|Psa Automobiles Sa|Flat light guide for motor vehicle signaling light module|
    法律状态:
    2017-12-18| PLFP| Fee payment|Year of fee payment: 2 |
    2018-08-03| PLSC| Publication of the preliminary search report|Effective date: 20180803 |
    2019-12-19| PLFP| Fee payment|Year of fee payment: 4 |
    2020-12-17| PLFP| Fee payment|Year of fee payment: 5 |
    2021-12-15| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1750668|2017-01-27|
    FR1750668A|FR3062453B1|2017-01-27|2017-01-27|LIGHT GUIDE LIGHTING DEVICE MOUNTED ON A CARRIER PART INCORPORATING A TRANSPARENT EXPANSION SCREEN|FR1750668A| FR3062453B1|2017-01-27|2017-01-27|LIGHT GUIDE LIGHTING DEVICE MOUNTED ON A CARRIER PART INCORPORATING A TRANSPARENT EXPANSION SCREEN|
    EP18152904.1A| EP3354977A1|2017-01-27|2018-01-23|Lighting device with light guide mounted on a supporting part incorporating a transparent magnification screen|
    CN201810082513.XA| CN108361651A|2017-01-27|2018-01-29|Lighting device with the light guide on the support element for being integrated with transparent amplification screen|
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