EP3159600A1 - Leuchtvorrichtung mit optischen wellenleitern - Google Patents

Leuchtvorrichtung mit optischen wellenleitern Download PDF

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Publication number
EP3159600A1
EP3159600A1 EP16195165.2A EP16195165A EP3159600A1 EP 3159600 A1 EP3159600 A1 EP 3159600A1 EP 16195165 A EP16195165 A EP 16195165A EP 3159600 A1 EP3159600 A1 EP 3159600A1
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EP
European Patent Office
Prior art keywords
guides
light
optical
successive
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP16195165.2A
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English (en)
French (fr)
Inventor
Vincent Godbillon
Jean-Claude Puente
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
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Valeo Vision SAS
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3159600A1 publication Critical patent/EP3159600A1/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides

Definitions

  • the invention relates to the field of lighting and / or signaling, especially for motor vehicles. It relates more particularly to a light device with optical guides adapted to be implanted in a projector light module.
  • a motor vehicle is equipped with projectors, or headlights, intended to illuminate the road in front of the vehicle, at night or in case of reduced brightness, by a global light beam.
  • projectors or headlights
  • These projectors, a left projector and a straight projector comprise one or more light modules adapted to generate and direct an intermediate light beam whose addition forms said overall light beam.
  • the projectors can generally be used in two lighting modes: a first mode “high beam” and a second mode “low beam”.
  • the “high beam” mode provides strong illumination of the road far ahead of the vehicle.
  • the “low beam” mode provides more limited illumination of the road, but still offers good visibility without dazzling other road users.
  • the two lighting modes, "high beam” and “low beam”, are complementary, and we switch from one to another depending on traffic conditions. The switching from one mode to another can be done manually, the driver deciding the moment of this switching, or it can be done automatically, depending on the detection by appropriate means of the conditions required for such a change of mode. 'lighting.
  • ADB Adaptive Driving Beam in English
  • Selective beam Such a ADB function consists of on the one hand automatically detecting a user of the road likely to be dazzled by a beam of light emitted in high beam mode by a projector, and on the other hand modify the outline of this beam of lighting so as to create a shadow zone at the location where the detected user is located.
  • the advantages of the ADB function are multiple: comfort of use, better visibility compared to a lighting in dipped beam mode, better reliability for the change of mode, risk of dazzling greatly reduced, driving safer.
  • the shape and arrangement of the guides relative to each other in a module of a projector must be very precise in order firstly to be able to produce an intermediate beam at the output of the module that is homogeneous and smoothed when all the segments are lit, and for the other hand to have a complementary intermediate beam of the intermediate beam produced at the output of the other projector.
  • the object of the invention is to propose a luminous device which allows the simple and efficient implementation of a matrix lighting function and whose lighting and / or signaling functions are at least as efficient as previously, and this cheaper.
  • the method of obtaining the device and light guides that compose it must be particularly simple and generate parts with reliable geometry and solid structure.
  • the subject of the invention is a luminous device comprising a transverse series of optical guides, each guide being capable of allowing the guiding of light rays between an input face and an output face.
  • the optical guides extend mainly in a first direction by being arranged in series in a second direction substantially perpendicular to said first direction.
  • the device is formed of a one-piece assembly integrating all the optical guides, the latter being arranged so that, in at least one cutting plane extending perpendicularly to the first direction between the faces of the inlet and the outlet faces of the guides, two successive guides of said series are shifted in a third direction substantially perpendicular to the first and second directions.
  • the optical guides are arranged so that the respective distal end, carrying the exit face, of two adjacent guides are in contact with one another and so that the respective proximal end, carrier of the entrance face, of these two neighboring guides are spaced apart from each other. It is understood that on the one hand the proximal ends of the guides must be spaced apart so that the light emitted by a light source towards an optical guide does not penetrate into the neighboring guide, and that on the other hand the distal ends of the guides must be glued successively to each other to avoid the dark areas between the light segments formed by the guides and projected to the projection device at the output of the module.
  • the distal ends of the neighboring optical guides may be pressed against each other on a determined covering portion, which may in particular take a value substantially equal to 1 mm.
  • the respective proximal ends, carrying the input faces (20), of two successive guides of the series can be spaced from each other in the second direction, with a transverse spacing of proximal ends of the two adjacent optical guides may be less than or equal to 5 mm.
  • optical guides in a material allowing the propagation of light rays by internal reflection from the input face to the exit face, for example polycarbonate (PC) or polymethyl methacrylate (PMMA) or silicone or glass.
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • the invention also relates to a light module for a motor vehicle headlamp in which at least first means are provided comprising a light device as just described above, to participate in the production of a plurality of light segments. selectively activatable.
  • the light module may comprise second means, arranged to produce a first cut-off beam directed towards a projection device arranged at the output of the module, the light segments made by the first means forming a second beam directed towards the projection device and complementary to the cut-off beam, when they are simultaneously activated.
  • the second means may consist of a first submodule arranged to produce a code-type beam, in particular having an oblique cut portion.
  • the projection device may be a lens but may take other forms known elsewhere.
  • the second means comprise at least one reflector, a light source disposed at a focal point of the reflector and a cover, arranged on the path of the light rays coming from the light source and reflected by the reflector, for the realization of the cut-off beam, and it is notable that the optical guides of the light device are arranged to be in contact with the cache. The optical guides may be oriented to contact the mask only in the vicinity of the focal area of the projection device.
  • the first means comprise a plurality of light sources, each light source being associated with an optical guide of the light device. Each light source is disposed at the input face of the associated optical guide.
  • the invention also relates to a lighting system comprising at least one light module as described above and control means for switching on, off or modifying the light power emitted by the first and second means of the light module.
  • At least one module is disposed in a vehicle left projector, and at least one other module is disposed in a right projector of the vehicle.
  • This detection module may consist for example of a camera facing the road scene extending in front of the vehicle, and associated image processing means, which allow the development of a detection information that the module of detection is able to send to the control means for switching on, extinguishing or modifying the light power emitted by each light source as a function of this detection information.
  • the light device 1 comprises a single piece 2, made of a translucent or transparent material, and in which we can distinguish a series of optical guides 4 each capable of guiding light rays from a light source 6 (visible on figures 1 , 4 and 5 ) respectively associated with each guide.
  • the device comprises five optical guides 4 arranged transversely in series among which can be distinguished a central guide 8, two intermediate guides 10 (referenced on the figure 2 ) and two lateral guides 12 arranged so that it is found successively a lateral guide, an intermediate guide, the central guide, an intermediate guide and a lateral guide. It will be understood on reading what follows that the number of optical guides formed in the one-piece part can vary without departing from the context of the invention.
  • optical guides extend mainly in a first direction, here arbitrarily named and not limiting longitudinal direction D L , and they are arranged in a series in a second direction, here named arbitrarily and not limiting transverse direction D T , substantially perpendicular to said first direction.
  • each optical guide In order to guide by internal reflection the light rays emitted by the associated light source, each optical guide has an input face 14 light arranged at a proximal end 16 and an exit face 18 of the light arranged at the distal end 20, and a lower face 22 (in particular visible on the figure 4 ), said reflection, and an upper face 24, said before, which extend between the ends of the input face and the output face.
  • the optical guides are further defined by side faces 25 extending similarly between the ends of the input face and the output face.
  • the height of an optical guide is arbitrarily defined as the dimension between the reflection face 22 and the front face 24 (visible on the figure 4 ), in a third direction substantially perpendicular to said first and second direction and here arbitrarily named and not limiting vertical direction D V.
  • the length of the guide is defined as the dimension between the inlet face and the exit face in the longitudinal direction D L , while the width of the guide corresponds to the dimension in the transverse direction D T in which the guides are in series. .
  • the optical guides 4 are arranged in a fan arrangement.
  • a fan arrangement of the guides of the device is understood to mean an arrangement in which the respective distal ends of the optical guides, carrying the exit faces of the light, are glued together and in which the respective proximal ends 16, bearing the input faces of the light opposite the sources of light, are spaced transversely from one another by a distance D 1 , visible on the figure 1 .
  • the proximal ends 16 are advantageously spaced so that the light emitted by a light source 6 towards an optical guide 4 does not penetrate into the neighboring guide, and the distal ends 20 of the guides must be successively glued to each other to avoid the zones. between the light segments formed by the guides and projected at the output of the light module in which the light device 1 is applied.
  • the distal ends of the optical guides are pressed against each other over a determined distance, which may be approximately 1 mm by way of example, to form a covering portion 26 of translucent or transparent material. of to ensure that light segments are covered and to ensure continuous illumination when all segments are lit.
  • a determined distance which may be approximately 1 mm by way of example, to form a covering portion 26 of translucent or transparent material.
  • the transverse spacing d measured between the lateral faces facing two adjacent guides, progresses progressively, at least over a certain length, that is moved longitudinally away from the distal end of the guides for reach its maximum value D 1 at the proximal end of the guides.
  • the one-piece piece is obtained by molding a translucent or transparent material for guiding the light rays by internal reflection in each of the guides from the input face to the exit face.
  • a translucent or transparent material for guiding the light rays by internal reflection in each of the guides from the input face to the exit face.
  • Such a material may for example consist of polycarbonate (PC), polymethyl methacrylate (PMMA), silicone or glass.
  • the one-piece part is molded so that at least two successive optical guides of the series extend, in at least one transverse and vertical cross-section plane P V , that is to say a plane cutting section extending perpendicularly to the first direction between the inlet faces and the outlet faces of the guides, at different heights in the third direction substantially perpendicular to the first and second directions.
  • two adjacent guides, in the transverse direction D T have the same longitudinal portion, that is to say a portion located at a predetermined length of the input face, vertically offset one by relative to the other a height h.
  • a clearance zone 27 is thus created beneath the vertically offset optical guide 4, which extends between the two adjacent guides arranged on either side of the offset optical guide.
  • a clearance zone 27 is formed under an intermediate guide and this zone extends transversely from a lateral guide 12 to the central guide 8.
  • Such a single piece is obtained by a single molding operation forming in one piece the optical guides.
  • the vertical offset provided between each adjacent optical guide avoids having to insert into the mold, between each optical guide, spikes to ensure the transverse shift increasing from the distal end to the transverse end.
  • two neighboring optical guides were arranged in the same plane, it would be advisable to have a particularly fine tip at its end to form, after the injection of material, the fine interstice that exists between the guides before they depart one of the other.
  • such a tool has a great fragility, which may involve breakage of the tip during molding or demolding.
  • a one-piece mold 28 in which inner walls 30 of the mold have a thickness, corresponding to the transverse dimension of the clearance zone 27, which is substantially equal to the transverse dimension of a guide, to know that vertically shifted between two optical guides 4 arranged in the same plane.
  • This thickness of the inner walls 30 is sufficiently large, for example at least 5 millimeters, not to break and allow easy demolding.
  • An example of mold 28 has been illustrated in section on the figure 3 with two wide inner walls as just described.
  • the luminous device 1 according to a first embodiment of the invention will now be described, relying in particular on the Figures 1 and 2 , on which it appears that the optical guides 4 are arranged so that the proximal ends 16 carrying the input faces 14 of two successive guides of the series are disposed substantially at the same height along said third direction.
  • one of said two successive optical guides has a curved shape.
  • the distal and proximal ends 16 of the two successive optical guides 4 extend into the same longitudinal and transverse plane P H so that it is at the central portion 36 of the guides that the height h the largest between two successive guides is measured.
  • the optical guides are arranged so that in this central portion 36, the h largest height is closer to the distal end 20 than the proximal end 16. In this way, we can create a steel blade of sufficient thickness in the mold at the distal end, whereas this need is less important when approaching the proximal end, where the lateral spacing between the guides increases, so that the difference in the third direction Dv.
  • the height h that is to say the vertical dimension separating one of the two successive guides, the largest is, at this central portion 36, substantially equal to a value within a range of values ranging from 1 to 10mm, for a length of about 20mm to 40mm. It will be noted that the height h is measured between the faces, before or reflection, of the two neighboring guides which are closest to one another.
  • the light sources 6 are each arranged facing an input face 14 of one of the optical guides 4, and it can be observed that these light sources extend in the same plane P H.
  • Such an arrangement is thus particularly advantageous, in addition to the vertical shift of the successive guides to facilitate the design of the tools and the molding of the one-piece part, in that the support means of the light sources 6, preferably light-emitting diodes carried by a printed circuit board, is easy to make and arrange in relation to the optical guides 4.
  • the one-piece part also carries structural elements 38 for fixing the part in a light module.
  • These structural elements here take the form of lateral lugs which may have as an example a tapped bore for the part to be screwed onto a support means of the light module. It is observed that these structural elements are arranged outside the guide path of the rays in the guides, so as not to hinder the delivery of light to the exit faces of the guides.
  • the two intermediate guides 10 are offset vertically relative to the lateral guides 12 and central 8, both in the same direction, that is to say here above the plane P H defined by the other guides. It is understood that it can be envisaged alternatively that the intermediate guides 10 are arranged differently, since they each have a vertical offset relative to their adjacent guides on at least a longitudinal portion, and they could for example s both extend below the plane P H , or extend one above and one below this plane, or at least one of the intermediate guides could extend above and partially below the plane P H.
  • the thickness of the intermediate guides 10 to the convex shape is not constant from the proximal end to the distal end, and that the reflection face 22 has a shape, for example substantially elliptical, distinct from the shape of the front face 24. It can be provided that the respective shapes of these two faces allow the light rays reflected in each optical guide to exit this guide mainly at the top of the exit face 18.
  • guides with elliptical shapes we can predict that the dimensions of these elliptical shapes vary from one guide to another, with values of major axis and small axis different. In a particular embodiment, all the optical guides deviate from the plane P H , but with different heights.
  • the light device 1 has a substantially symmetrical arrangement on either side of the central guide, with the exception of the height of each symmetrical part.
  • the height of the optical guides 4 is different depending on whether the guides are arranged on one side or the other of the central guide, and the central guide 8 has an exit face 18 whose contiguous edge with the front face 24 is cropped. to present a projection 40, vertical or oblique, so as to substantially form a step.
  • the guides arranged to the right of the central guide 8 when looking at the device in front of the exit faces of the guides, have a lower height than the guides arranged to the left of the central guide.
  • the central guide 8 has an outlet face arranged to have a lateral edge, whose height corresponds to that of the distal end of the guides arranged on one side of the central guide, another side edge, the height of which corresponds this time to that of the distal end of the guides disposed on the other side of the central guide, and an upper edge connecting the two lateral edges and having said projection 40.
  • the covering portion 26 plays on the one hand a role of homogenization of the light beam at the output of the light device 1, by providing an outlet face of the common spokes 42 to each of the optical guides 4, and it also plays a role in structural role of holding the optical guides together in the form of a transverse strip interconnecting the distal end of the guides.
  • the device thus created by molding a single piece 2 is then fixed in a light module by a mounting bracket 44 adapted to be attached to the module structure.
  • the fixation support further ensures the support of the distal ends and the proximal ends of the optical guides, and advantageously the support of the light sources and the printed circuit board may be necessary depending on the type of source chosen.
  • the module is a so-called bifunction module, that is to say a module in which two sub-modules 46, 48 are arranged one against the other to complement a "high beam” function and a function of "low beam”, by projection of light beams to a projection optical device 49, lens type, disposed at the output of the module.
  • the module is part of a lighting system which also comprises control means for switching on, off or modifying the light power emitted by each light source of each module. These control means may be specific to each module or consist of single control means, since the control of each light source of the system can be simultaneous.
  • the lighting system further comprises a detection module on the road of a body not to dazzle. This detection module consists for example of a camera facing the road scene extending in front of the vehicle, and associated image processing means, which allow the development of a detection information that the detection module is able to send to the control means for switching on, switching off or modifying the light power emitted by each light source as a function of this detection information.
  • a lighting system comprising at least two lighting modules as they can be described here. These modules are distributed so that at least one of the modules is disposed in a left projector of the vehicle, and that at least one of the modules is disposed in the corresponding right projector. In each projector, a plurality of lighting modules may be provided. The modules are arranged relative to each other either within the same projector, or between the two projectors, so that at least one beam portion, for example a segment, made by the one modules covers at least one beam portion, in the example a segment, made by another of the modules.
  • the first sub-module is arranged to produce a first cut-off beam, to perform the "low beam” function
  • the second sub-module is arranged to realize a second complementary beam of the first beam so that these two superimposed beams together perform the function "high beam”.
  • complementary beam is meant a beam which forms with the beam produced by the first sub-module a coherent beam when the two sub-modules are controlled to simultaneously achieve the emission of the light beam which is specific to them.
  • the module comprises a cover 50, for example coated with a reflective coating to form a folder, and a support plate 52 which extend substantially in the median plane of the module, between the two sub-modules, the cover extending especially on the path of the rays reflected by the first submodule 46 to allow in known manner the cut of the first beam while the support plate carries the two submodules and their respective source (s) of light (s) and a cooling means 54 of all .
  • a cover 50 for example coated with a reflective coating to form a folder
  • a support plate 52 which extend substantially in the median plane of the module, between the two sub-modules, the cover extending especially on the path of the rays reflected by the first submodule 46 to allow in known manner the cut of the first beam while the support plate carries the two submodules and their respective source (s) of light (s) and a cooling means 54 of all .
  • the cover 50 has a cutoff edge 56 which has a curved profile, in particular by presenting an inclined plane, for example a shape of a step substantially in the center of the cut-off edge of shape corresponding to the projection 40 made on the front face of the central guide 8
  • Other types of profile may be provided, such as a profile without a step.
  • the complementary beam of the second sub-module is a selective beam allowing the realization of a non-glare high beam function, with a beam divided into several portions, which can be turned on or off selectively according to the control instructions of the associated light sources. in the second submodule.
  • the illumination function performed by each beam portion may be extinguished or attenuated to form a glare zone of a detected vehicle driver in the road scene upstream of the vehicle, while still maintaining good driving conditions. lighting the rest of the road scene.
  • the second submodule 48 comprises on the one hand a plurality of light sources 6 selectively activatable to emit, simultaneously or alternatively, light rays, and on the other hand the light device 1 described above and composed of a plurality of guides 4.
  • the device 1 and the light sources 6 are positioned relative to each other, so that each source 6 is able to cooperate with one of the optical guides 4 to form images of these sources at the same level. of the focal zone illustrated by the curved focal surface P f of the projection optical device 49, so that these images can be projected by the projection device at the output of the module.
  • Each beam portion is obtained by the cooperation of a light source and an associated optical guide and these beam portions here take the form of rectilinear straight strips corresponding to the shapes of the output faces of the optical guides of the light device.
  • the light device 1 is arranged in the second sub-module 48.
  • the exit faces 18 of the optical guides 4 are turned towards the lens of the projection system 49 and the input faces 14 are turned inwards. of the module facing the light sources 6.
  • the reflection face 22 of each guide is turned away from the cover 50 while the front face 24 is turned towards the cover 50.
  • the device is arranged in the module of FIG. so that only the distal ends of the optical guides are in contact with the cover, and only in the vicinity of the focal surface Pf of the lens. It is understood that the guides are sufficiently inclined relative to the horizontal so that the curved portion of the guides is not in contact with the cover. This is the line of junction between the outlet faces 18 of each guide and the covering portion 26 of the light device which is in contact with the cover 50.
  • the orientation of the guides and the presence of the cover means that part of the rays brought from the input face to the exit face by internal reflections inside each guide directly reaches the lens in its upper half. while another part of the rays is reflected by a lower face of the cover to reach the lens in its lower half.
  • the areas of image overlap formed by the fact that the distal ends of the optical guides are pressed against each other on a given portion, are arranged upstream of the focal zone of the lens, which allows to project a complementary beam whose different portions are smoothed to avoid vertical cutting, in the case of a segmentation of the beam, too clear.
  • the light sources each consist of a semiconductor source, and for example a light-emitting diode fixed on a printed circuit board, or directly attached to structural elements of the module.
  • the light sources are arranged in transverse series, with a gap between each source, which may advantageously be between 5 and 10 mm and which is substantially equal to the transverse spacing between two faces. successive optical guide input of the light device, so that each guide is well disposed opposite one of these light sources.
  • the series of optical guides of the device is centered transversely in the module, so that the central optical guide 8 and the upper edge of its distal end 20 cooperates with the inclined plane of the cover 50.
  • the intermediate optical guides 10 and lateral 12 extend transversely on either side of this inclined plane of the cache.
  • a second embodiment of a light device 101 which differs from the first embodiment described above in that the optical guides 104 of the one-piece piece 102 are arranged so that the proximal ends 116 carrying the faces 114 of two successive guides of the series are offset vertically, or in other words in the direction substantially perpendicular to the direction of the guide series and the main direction said guides.
  • the vertical offset from one proximal end 116 to the other may be between 1 and 10 mm.
  • Each optical guide 104 is formed of a first proximal portion 117 and a second distal portion 119.
  • An intermediate guide 110 whose proximal end 116 is offset vertically relative to its guide adjacent to the series, may present a first proximal portion substantially parallel to the first proximal portion of the neighboring guide.
  • the second distal portion 119 of the intermediate guide 110 has a curvature for connecting the first proximal portion 117 to the overlap portion 126 disposed transversely downstream of each distal end 120 of the guides.
  • the lateral guides 112 and central 108 extend in a flat manner, as illustrated in FIG. figure 5 and hence the optical guide 104 whose proximal end 116 is vertically offset, here the intermediate guide 110 has a first substantially flat proximal portion 117 and a second curved distal second portion 119.
  • the shape of the lateral guides 112 and central 108 may be different, and in particular elliptical, as visible on the figure 4 , and that therefore the intermediate guide 110 has a first proximal portion 117 and a second distal portion 119 curves, the curvature of the distal portion 119 being accentuated relative to the curvature of the first proximal portion 117 to connect the recovery portion 126 .
  • the two intermediate guides 110 are offset vertically relative to the lateral guides 112 and central 108, in different directions, that is to say that one extends mainly above the general plane of extension P G defined by the lateral and central guides and that the other extends mainly below this plane P G. It is understood that it can be envisaged alternatively that the intermediate guides 110 are arranged differently, since their proximal end is arranged with a vertical offset relative to the proximal end of their neighboring guides, and they could for example both extend below the plane P G , or both extend above this plane as in the first embodiment previously described. In each of these cases, the vertical shift of the intermediate guides results in the formation of a clearance zone 127 suitable for use in making thicker inner mold walls than should be used if the guides were to extend. all in the same plane.
  • the arrangement of the optical guides 104 in the one-piece piece 102 imposes a staged distribution of the light sources 106 so that according to the invention, a light source is associated with a light guide.
  • the light sources 106 are thus arranged alternately at different heights, and the distance left between a light source and any other source of the series is greater than the distance between two neighboring sources according to the first embodiment, and this has an advantage in terms of cooling these light sources, especially for the use of light emitting diodes whose performance can be reduced by temperature.
  • the foregoing description aims to explain clearly how the invention achieves the objectives it has set itself and in particular to propose a light device that facilitates the design and manufacture of a plurality of optical guides.
  • the device is particularly effective optically, because of the one-piece design incorporating all the guides, which limits the number of manufacturing operations and the addition of the resulting tolerances, and which limits the risk of relative positioning defect guides between them during a subsequent editing.
  • the device allows a molding of the one-piece piece made easy by the clearances between the successive guides in a direction perpendicular to the general extension plane of the one-piece piece. Tooling and corresponding molds are thus easier and less expensive to design, and manufacturing losses less important.
  • the light device comprises according to the invention at least two neighboring optical guides offset vertically with respect to each other, these modifications being able notably to consist in the number of the optical guides and in the presence or not of structural elements connecting transversely the guides to ensure the holding in particular of the proximal end, independently of the support means of the module in which the device is applied.
  • the invention can not be limited to the embodiment specifically described in this document, and extends in particular to all equivalent means and any technically operating combination of these means.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP16195165.2A 2015-10-23 2016-10-21 Leuchtvorrichtung mit optischen wellenleitern Pending EP3159600A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1560147A FR3042846B1 (fr) 2015-10-23 2015-10-23 Dispositif lumineux a guides optiques

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EP3159600A1 true EP3159600A1 (de) 2017-04-26

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EP (1) EP3159600A1 (de)
FR (1) FR3042846B1 (de)

Citations (11)

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US20050243570A1 (en) * 2004-04-23 2005-11-03 Chaves Julio C Optical manifold for light-emitting diodes
US20090016074A1 (en) * 2007-07-09 2009-01-15 Magna International Inc. Semiconductor light engine using glass light pipes
WO2013075157A1 (de) * 2011-11-22 2013-05-30 Zizala Lichtsysteme Gmbh Led-projektionsmodul
EP2607776A2 (de) * 2011-12-22 2013-06-26 Automotive Lighting Reutlingen GmbH Beleuchtungseinrichtung für ein Kraftfahrzeug mit einer Lichtleiterstruktur
DE102012202508A1 (de) * 2012-02-17 2013-09-12 Automotive Lighting Reutlingen Gmbh Lichtleitervorrichtung für eine Kraftfahrzeugleuchte
EP2660508A2 (de) * 2012-05-04 2013-11-06 Zizala Lichtsysteme GmbH Leuchtanordnung für Kraftfahrzeuge
EP2719940A2 (de) * 2012-10-12 2014-04-16 Automotive Lighting Reutlingen GmbH Lichtmodul
EP2738453A1 (de) * 2012-11-29 2014-06-04 Valeo Vision Lichtwellenleiter für eine optische Vorrichtung, insbesondere zur Beleuchtung und/oder Signalisierung
JP2014229510A (ja) * 2013-05-23 2014-12-08 三菱電機株式会社 Ｌｅｄ点灯装置および車載用灯具
DE102013211868A1 (de) * 2013-06-21 2014-12-24 Automotive Lighting Reutlingen Gmbh Lichtleiter für KfZ-Beleuchtungseinrichtung
JP2015053147A (ja) * 2013-09-05 2015-03-19 市光工業株式会社 車両用灯具

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050243570A1 (en) * 2004-04-23 2005-11-03 Chaves Julio C Optical manifold for light-emitting diodes
US20090016074A1 (en) * 2007-07-09 2009-01-15 Magna International Inc. Semiconductor light engine using glass light pipes
WO2013075157A1 (de) * 2011-11-22 2013-05-30 Zizala Lichtsysteme Gmbh Led-projektionsmodul
EP2607776A2 (de) * 2011-12-22 2013-06-26 Automotive Lighting Reutlingen GmbH Beleuchtungseinrichtung für ein Kraftfahrzeug mit einer Lichtleiterstruktur
DE102012202508A1 (de) * 2012-02-17 2013-09-12 Automotive Lighting Reutlingen Gmbh Lichtleitervorrichtung für eine Kraftfahrzeugleuchte
EP2660508A2 (de) * 2012-05-04 2013-11-06 Zizala Lichtsysteme GmbH Leuchtanordnung für Kraftfahrzeuge
EP2719940A2 (de) * 2012-10-12 2014-04-16 Automotive Lighting Reutlingen GmbH Lichtmodul
EP2738453A1 (de) * 2012-11-29 2014-06-04 Valeo Vision Lichtwellenleiter für eine optische Vorrichtung, insbesondere zur Beleuchtung und/oder Signalisierung
JP2014229510A (ja) * 2013-05-23 2014-12-08 三菱電機株式会社 Ｌｅｄ点灯装置および車載用灯具
DE102013211868A1 (de) * 2013-06-21 2014-12-24 Automotive Lighting Reutlingen Gmbh Lichtleiter für KfZ-Beleuchtungseinrichtung
JP2015053147A (ja) * 2013-09-05 2015-03-19 市光工業株式会社 車両用灯具

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FR3042846B1 (fr) 2017-12-01

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