• 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 provides an optical device comprising at least a first light guide having an exit face. The first guide being configured to propagate light rays from a first light source to its output face. The exit face is disposed facing a coupling zone which is part of the lateral surface of a second generally tubular light guide of the device. The invention makes it possible to improve the transmission of the light emitted by the exit face of the first guide through the second guide. The invention proposes in particular the implementation of a light device for a motor vehicle incorporating two light functions.
    公开号:FR3041741A1
    申请号:FR1559313
    申请日:2015-09-30
    公开日:2017-03-31
    发明作者:Lamberterie Antoine De；Boubacar Sagna；Juan Manuel Martinez；Jesus Romo；Maria-Del-Carmen Montano
    申请人:Valeo Iluminacion SA；
    IPC主号:
    专利说明:

    Optical device and signaling and / or lighting system for a motor vehicle
    The present invention relates to an optical device and in particular to a lighting and / or signaling system for a motor vehicle, the system being equipped with such a device.
    A direction indicator light of a motor vehicle is used to inform drivers of neighboring vehicles in road traffic that the driver wishes to change direction. The correct perception of the indicator light is a key element of road safety. It is known that a direction indicator light is a light that emits a flashing light signal with amber or red light, the flashing and the color being chosen so as to quickly attract the attention of an observer to the transmitted signal. The use of a "tracer light" makes it possible to increase the perceptibility of such a signal and to increase road safety. Indeed, the Human Visual System reacts quickly to a perceived movement. In general, a scroll of a light is perceived faster than a change of color and even faster than a flicker. The use of light-emitting diodes, LEDs, is increasingly recommended in the field of motor vehicles, in order to achieve light functions such as daytime running lights, traffic lights, or for example direction indicator lights. The use of light guides to guide the light emitted by an LED or a group of LEDs is also a measure that finds its application in the light devices of a motor vehicle. This technique allows great freedom in the design of a projector, especially in terms of the arrangement of the LEDs, whose physical location does not necessarily correspond to the location of the light tasks they are intended to produce. A light guide known in the state of the art can be used to guide the light emitted by an LED mounted at a first location to a second different location. Alternatively, a strip light guide can be used to illuminate a strip, corresponding to the output of the guide, more or less homogeneously using one or more LEDs.
    In a known manner, light guides placed along a line can be used to produce a scrolling direction indicator. Each guide or portion of a guide corresponds to a segment of the direction indicator and the sequential ignition of the segments makes it possible to obtain a scrolling effect.
    It has been proposed, for example in patent document EP 2 541 128, to use a plurality of light guides within the same optical device, in order to perform several light functions of a lighting or signaling device. of a motor vehicle. The integration of several light functions, for example a scrolling direction indicator function and a daytime running light function, makes it possible on the one hand to reduce the space requirement in the restricted space imposed by a vehicle light, and on the other hand makes it possible to to make interesting optical signatures.
    In the solution known from EP 2 541 128, a daylight function can be performed by a cylindrical light guide arranged behind an exit face of a web guide, which can implement a direction indicator function. The intensity of the apparent luminous flux emitted by the first light guide can however be reduced by the passage of the rays emitted through a portion of the second guide.
    DE 10 2013 104 169 discloses providing a first light guide having a cylindrical exit face in front of a web guide. In this arrangement, the intensity of the luminous flux emitted by the sheet guide is reduced by the passage of rays emitted through a portion of the first guide. The invention aims to overcome at least one of the problems posed by the prior art. The subject of the invention is an optical device comprising at least a first light guide having an exit face. The first guide is configured to propagate light rays from a first light source to its output face. The exit face is disposed facing a coupling zone forming part of the lateral surface of a second generally tubular light guide. The second light guide further comprises an exit face opposite to the coupling zone. The second guide is arranged to propagate light rays entering through said coupling area, as well as light rays from at least a second light source and entering through at least one end of the tube, to its output face. The device is remarkable in that the second light guide comprises at least one section whose cross section comprises a portion having an elliptical contour.
    Preferably, the elliptical portion may comprise the cross section of the exit face of the second guide.
    The contour of the cross section may preferably comprise a truncated cone portion, the small base of which corresponds to the coupling zone.
    Preferably, the contour of the cross section of the section of the second guide may be an ellipse.
    The section and the exit face may preferably extend over the entire length of the second light guide.
    Preferably, the second light guide may comprise at least a second section, a section of which comprises a portion having an elliptical contour.
    The first light guide or guides may each preferably comprise a main propagation zone in the form of a sheet.
    Preferably, the longitudinal direction of the second guide may be substantially perpendicular to the direction of propagation of the light rays in the main propagation zone of the first guide or guides. The combined thickness of the exit faces of the first light guides may preferably be greater than or equal to the corresponding thickness of the coupling area of the second guide. The invention also relates to a lighting system for a motor vehicle comprising a first light source and a second light source. The system is remarkable in that it comprises a device according to the invention.
    The second light source may preferably comprise a pair of light-emitting diodes, each at one end of the second guide.
    Preferably the first light source can be configured to emit a flashing flow of change of direction.
    The flashing light stream may preferentially be a stream of flashing lights flashing.
    The second light source may preferably be configured to emit a daylighting stream.
    According to the measures of the invention, an optical device with two distinct types of light guides is used to produce a lighting system implementing two distinct signaling or lighting functions of a motor vehicle. As the first sheet guide, which preferably performs the direction indicator function scrolling direction, is arranged behind the second tubular guide, which preferably performs the daytime running function, the size is reduced compared to a conventional arrangement in which both types of guides are arranged side by side. Compared to known solutions having similar arrangements but using tubular guides with circular cross section, thanks to the elliptical profile of the tubular guide according to the invention the perceived luminous intensity of the second sheet guide, transmitted through the tubular guide , is significantly increased. In a comparison of the device according to the invention to a similar device but having a second cylindrical guide, an increase in the perceived luminous flux from the first web guide of about 30% could be measured. Other features and advantages of the present invention will be better understood with the aid of the exemplary description and the drawings, of which: FIG. 1 represents a schematic view of a cross section of the device according to a preferred embodiment of the invention; invention; Figure 2 shows a schematic view of a cross section of the device according to a preferred embodiment of the invention; Figure 3 shows a schematic perspective view of the device according to a preferred embodiment of the invention; Figure 4 shows a schematic view of a cross section of the device according to a preferred embodiment of the invention.
    In the following description, like reference numerals will be used to describe similar concepts through different embodiments of the invention. Thus, the numbers 100, 200 describe an optical device in two different embodiments according to the invention.
    Unless specifically indicated otherwise, technical characteristics described in detail for a given embodiment may be combined with the technical characteristics described in the context of other embodiments described by way of example and not limitation. In general, the invention can use light sources of the light emitting diode type, LED. The LEDs comprise, in known manner, a semiconductor element capable of emitting light of a predetermined color when traversed by a current of a predetermined intensity. In the following description, a light source can describe a set of elementary sources that are used to achieve a single light function, each elementary source being an exemplary LED.
    The optical device according to the invention takes advantage of the known techniques with regard to the light guides allowing the propagation of light rays emitted by a light source through the medium constituting the guide. For example, the first and second guides that will be described may be made from materials such as polymethyl methacrylate, PMMA, polycarbonate, PC, silicone or other materials preferably having a refractive index of between 1, 49 and 1.59.
    Figure 1 shows an illustration of a first embodiment of the optical device 100 according to the invention. The device comprises a first light guide 110 having an exit face 112. The first guide is configured to propagate the light rays coming from a first light source 10 towards its exit face 112. The exit face is arranged facing a coupling zone 121 which is part of the lateral surface of a second light guide 120 with a generally tubular geometry. At least a portion of light rays emitted by the first guide 110 through the exit face 112 enter the second guide 120 through the coupling zone 121.
    The second light guide 120 is a tubular guide consisting of an essentially elongated body. It also comprises an exit face 122, opposite to its coupling zone 121. The second guide 120 is arranged to propagate the light rays entering the guide by said coupling zone 121, as well as light rays coming from minus a second light source not shown and entering at least one end of the tube, towards its outlet face 122. As indicated by the illustration of Figure 1, the second light guide 120 comprises at least one section whose section straight line 123 comprises an elliptical contour portion. In this case, the illustration shows the non-limiting example in which the cross section 123 is an ellipse. The major axis of the ellipse is generally aligned with the longitudinal extent of the first guide 110. The coupling 121 and outlet 122 faces are opposite portions of the lateral surface of the tube 120. The section having the cross-section with a conformal contour to the invention may represent a part of the extension of the tube 120 or, alternatively, it may constitute the entirety of the tube 120. In the latter case, all the straight sections of the tubular guide 120 have an outline having at least an elliptical portion. Preferably, the elliptical portion corresponds to the location of the outlet face 122 of the guide 120.
    A preferred embodiment of the first light guide 110 is detailed in the illustration of FIG. 1. The cross-section follows the ray propagation direction in a main propagation zone 111 of the guide. The guide 110 comprises an input face 113 through which the light rays coming from a first light source 10 are admitted. From the input face 113, the spokes follow a path initially oriented mainly along the thickness of the light guide 110 and undergo at least one reflection on a reflection surface to direct the reflected rays in the propagation zone main 111 to exit the guide by the exit face 112. At least the main propagation zone 111 forms a guide ply having a smaller thickness relative to its length and can be curved to adopt a given curve.
    The propagation zone 111 is delimited vertically by an upper guide face 115 and a lower guide face 114. The two guide faces 114, 115 are preferably parallel and spaced so that the zone 111 has a constant vertical thickness which is low compared to its longitudinal and transverse dimensions. The invention leaves all freedom of shape and dimensions for the sheet and a great freedom of design of the first light guide 110 to adapt it to the light function to be performed by means of the first light source 10. The use a second tubular type guide makes it possible to dispose a portion of the second light source at one end of the guide 120 and advantageously to have two elementary sources of the second source each at one end of the guide. The use of a tubular guide as the second light guide 120 allows to orient substantially transversely to the web constituting the main propagation zone 111 of the first guide 110.
    Figure 2 shows a second embodiment of the device 200 according to the invention. The first guide 210 is substantially similar to the guide 110 which has been described. The second guide 220 of generally tubular geometry has a generally planar coupling zone 221 facing the outlet face 212 of the first guide. The relative arrangement of the guides 210, 220 is such that at least a portion of the light rays emitted from the exit face 212 enter the guide 220 through this coupling zone. The planar geometry of the coupling zone 221 favors the entry of the rays into the guide. The illustrated section of guide 220 is a straight section. The part of the contour 223 of the section which corresponds to the coupling zone 221 forms the small base of a truncated cone which expands towards the exit face 222. On the side of the exit face 222, the contour 223 has an elliptical portion. In known manner, the coupling zone can serve as a base for reflective prisms disposed inside the guide 220 and able to deflect the light rays that propagate in the middle of the guide towards the exit face 222. The coupling zone 221 is located in the vicinity of one of the foci of the ellipse defining the exit face 222, said neighborhood being defined by the size of the reflective prisms, usually less than 2mm.
    Figure 3 shows the embodiment of Figure 2 in a schematic perspective view. It is apparent that the first guide 210 comprises a plurality of like segments along a direction perpendicular to the main propagation direction of the guide 210. It may also be a plurality of equivalent guides arranged in a row. In known manner, the segments can for example be illuminated through the first light sources 10 sequentially to achieve a scrolling light function. The second light source 20 serves to illuminate the second guide 220. The light rays from the source 20 enter the guide 220 through one end of the tubular structure to be propagated and directed towards the exit face 222. Although the illustrated example shows essentially straight extents of guides 210, 220 these guides may have curvatures in a given curve without departing from the scope of the present invention. The thickness of the guide ply 210 is preferably greater than or equal to the corresponding thickness of the coupling zone 221 of the second guide 220. In the alternative embodiment illustrated in FIG. 4, two guide plies or first guides 210, 230 are arranged in two superposed rows. In this case, the combined thickness of the guide plies 210, 230 is preferably greater than or equal to the corresponding thickness of the coupling zone 221 of the second guide 220. The arrangement is such that the outlet faces 212, 232 are vis-a-vis the coupling zone 221. Obviously, a larger plurality of first guides can be superimposed without departing from the context of the invention.
    When the first and second guides have curved portions, the second guide, arranged in parallel with respect to the exit face of the first guide, preferably comprises at least one section having an arbitrary cross-section corresponding to the elliptical contour which has just to be described. The plane in which the elliptical contour is located is calculated using optical simulation means in known manner and so as to orient the light rays which are emitted by the output face of the second tubular light guide in the same direction, independently of the straight or curved section of the tubular structure, taking into account in particular the refractions generated by each curved interface, which depend on the local curvature and the optical guides indices.
    Preferably, the device according to the invention finds its application in a light device for a motor vehicle. It may for example be a signaling device such as a daytime running light with integrated running indicator. An example is given with reference to the optical device of FIG. 3. A light device of a motor vehicle comprises, in a known manner, means for controlling the power supply of the light sources or LEDs 10, 20. power supply generally comprise a converter element adapted to convert an electric current of a first intensity, supplied by an internal vehicle power source such as a battery, into a charging current of a second different intensity, suitable for power the LEDs 10, 20 mounted in load of the converter element.
    A microcontroller element can in known manner be used to program the selective and / or sequential supply of the plurality of first light sources 10. Thus, a direction indicator scrolling can be realized. The different segments of the output face 212 of the guide 210 are illuminated if the associated light sources 10 are adequately supplied. The light emitted by each of the segments of the exit face 212 is transmitted through the second guide 220 and its exit face 222. When the second light sources 20 are energized, the tubular guide 220 is illuminated along its entire length and the radii light are emitted by the output face 222.
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    claims
    An optical device (100) comprising at least a first light guide (110) having an output face (112), the first guide being configured to propagate light rays from a first light source to its output face ( 112), the exit face being disposed opposite a coupling region (121) forming part of the lateral surface of a second generally tubular light guide (120), wherein the second light guide (120) further comprises an exit face (122) opposite to the coupling zone (121), the second guide being arranged to propagate the light rays entering through said coupling zone (121), as well as light rays coming from at least one second light source and entering at least one end of the tube towards its exit face (122), characterized in that the second light guide (120) comprises at least one section whose right section (123) comprises a portion having a conto elliptical.
    [2" id="c-fr-0002]
    2. Device according to claim 1, characterized in that the elliptical portion comprises the cross section of the outlet face (122) of the second guide (120).
    [3" id="c-fr-0003]
    3. Device according to one of claims 1 or 2, characterized in that the contour of the cross section (123) comprises a truncated cone portion, the small base corresponds to the coupling zone (121).
    [4" id="c-fr-0004]
    4. Device according to claim 1, characterized in that the contour of the cross section (123) of the section of the second guide (120) is an ellipse.
    [5" id="c-fr-0005]
    5. Device according to one of claims 1 to 4, characterized in that the section and the outlet face (122) extend over the entire length of the second light guide (120).
    [6" id="c-fr-0006]
    6. Device according to one of claims 1 to 4, characterized in that the second light guide (120) comprises at least a second section, a section comprises a portion having an elliptical contour.
    [7" id="c-fr-0007]
    7. Device according to one of claims 1 to 6, characterized in that the or the first light guides each comprise a main propagation zone in the form of a sheet.
    [8" id="c-fr-0008]
    8. Device according to claim 7, characterized in that the longitudinal direction of the second guide is substantially perpendicular to the direction of propagation of light rays in the main propagation zone of the first guide or guides.
    [9" id="c-fr-0009]
    9. Device according to one of claims 1 to 8, characterized in that the combined thickness of the output faces of the first light guides is greater than or equal to the corresponding thickness of the coupling zone (121) of the second guide (120 ).
    [10" id="c-fr-0010]
    10. Lighting system for a motor vehicle, comprising a first light source, a second light source, and characterized in that it comprises a device according to one of claims 1 to 9.
    [11" id="c-fr-0011]
    11. System according to claim 10, characterized in that the second light source comprises a pair of light-emitting diodes, each at one end of the second guide (120):
    [12" id="c-fr-0012]
    12. System according to one of claims 10 or 11, characterized in that the first light source is configured to emit a flickering flow of change of direction.
    [13" id="c-fr-0013]
    13. System according to claim 12, characterized in that the flashing light stream is a stream of flashing lights flashing.
    [14" id="c-fr-0014]
    14. System according to one of claims 10 to 13, characterized in that the second light source is configured to emit a daylighting flow.
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    同族专利:
    公开号 | 公开日
    FR3041741B1|2017-11-24|
    EP3150907A1|2017-04-05|
    EP3150907B1|2018-11-14|
    US20170089540A1|2017-03-30|
    US9951923B2|2018-04-24|
    CN207162422U|2018-03-30|
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    法律状态:
    2016-09-28| PLFP| Fee payment|Year of fee payment: 2 |
    2017-03-31| PLSC| Publication of the preliminary search report|Effective date: 20170331 |
    2017-09-29| PLFP| Fee payment|Year of fee payment: 3 |
    2018-09-28| PLFP| Fee payment|Year of fee payment: 4 |
    2019-09-30| PLFP| Fee payment|Year of fee payment: 5 |
    2020-09-30| PLFP| Fee payment|Year of fee payment: 6 |
    2021-09-30| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1559313A|FR3041741B1|2015-09-30|2015-09-30|OPTICAL DEVICE AND SIGNALING AND / OR LIGHTING SYSTEM FOR A MOTOR VEHICLE|FR1559313A| FR3041741B1|2015-09-30|2015-09-30|OPTICAL DEVICE AND SIGNALING AND / OR LIGHTING SYSTEM FOR A MOTOR VEHICLE|
    EP16190373.7A| EP3150907B1|2015-09-30|2016-09-23|Optical device and signalling and/or lighting system for a motor vehicle|
    US15/278,119| US9951923B2|2015-09-30|2016-09-28|Optical device and signaling and/or lighting system for an automotive vehicle|
    CN201621098937.8U| CN207162422U|2015-09-30|2016-09-30|Optical devices and signal and/or illuminator for automobile|
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