法国专利FR3042845A1 LIGHT DEVICE WITH OPTICAL GUIDES

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专利摘要:
A luminous device (1) comprises a series of optical guides (6) able to each allow the guiding of light rays between an input face (20) arranged at a proximal end (16) of the optical guide, and an exit face (22). The device is formed of at least two subsets (2, 4) made distinctly and each comprising at least a portion of said series of optical guides and first structural members (14) for holding the guides in position connecting the successive optical guides of said subassembly, the two subassemblies being able to be assembled to form said device by cooperation of said first structural elements. The distal ends of at least two successive optical guides of the series are linked by a piece of flexible material (5) translucent or transparent.
公开号:FR3042845A1
申请号:FR1560145
申请日:2015-10-23
公开日:2017-04-28
发明作者:Kostadin Beev；Vincent Godbillon；Jean-Claude Puente
申请人:Valeo Vision SA；
IPC主号:

专利说明:

The invention relates to the field of lighting and / or signaling, in particular 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. 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.
These 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.
There is now a need, in the field of the automobile, to be able to illuminate the road ahead in "partial road lighting mode", namely to generate in a road beam one or more dark beaches corresponding to the locations where there are vehicles coming from in the opposite direction or vehicles driving ahead, so as to avoid dazzling other drivers while illuminating the road in its larger area. Such a function is called ADB (Adaptive Driving Beam in English) or "selective beam Such an ADB function is to firstly automatically detect a user of the road may be dazzled by a lighting beam emitted in headlight mode by a projector, and on the other hand modify the outline of the lighting beam so as to create a shadow zone at the location where the user is detected. 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.
There are known light modules for the production of selective beams in which optical guides are arranged side by side, each being illuminated by a respective light source so that the light beam at the output of the module is cut into contiguous segments that are may switch off or on depending on detection instructions of a nearby vehicle.
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 invention is in this context and it aims to provide a light device that allows the simple and effective implementation of a matrix lighting function and whose lighting and / or signaling functions are at least as performance than previously, and at a lower cost, especially without requiring manufacturing conditions detrimental to mass production. For this purpose, the subject of the invention is a light device comprising a series of optical guides capable of allowing each of the light rays to be guided between an input face arranged at a proximal end of the optical guide, and an exit face, in which two subassemblies made separately form by assembly the light device. Each subassembly comprises at least a part of said series of optical guides and first structural elements for holding the guides in position connecting together the successive optical guides of said subassembly, in particular at the proximal ends of the optical guides, the two subassemblies being able to be assembled to form said device by cooperation of said first structural elements, in particular at the level of the input faces. Moreover, the distal ends of at least two successive optical guides of the series are linked by a piece of translucent or transparent flexible material.
Thus, it is possible to compensate for defects in the assembly obtained by assembling the two subassemblies, in particular as regards the relative position of the distal ends of the guides, by the presence of this flexible material, which blocks the holes left between the guides during the assembly and which allows the passage of light to an exit face by its transparency.
According to a particular characteristic of the invention, 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 input face, of these two adjacent guides are spaced transversely from one another. 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 presence of the piece of translucent or transparent flexible material covering the distal ends of the guides makes it possible to compensate for any gaps between two guides and the formation of these dark areas.
In this fan shape, 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. And the transverse spacing of the proximal ends of the two adjacent optical guides may be less than or equal to 5 mm.
According to a first series of characteristics, taken alone or in combination, it is possible to provide that: the distal end of each of the optical guides is covered by the piece of flexible material which forms a continuous strip extending downstream of the entire series; guides ; the piece of flexible material is deformed by pressure of the subassemblies assembled with each other; the piece of flexible material is overmolded on the distal ends of the optical guides; the piece of flexible material has a continuous face which extends opposite the optical guides and which forms an outlet face common to the guides of the light device; a means for holding the piece of flexible material in position is mechanically connected to at least a part of the first structural elements; the piece of flexible material is disposed between at least two distal ends of two successive optical guides of the device.
According to another series of characteristics, taken alone or in combination, relating to a particular structure in which at least one first subassembly further comprises a second structural element, distinct from the first structural element and capable of connecting the distal ends of the optical guides of this first subassembly, it can be provided that: the second structural element consists of a strip made of translucent or transparent material and disposed transversely, downstream of said distal ends in the path of the light rays, said strip and two successive guides of this first subassembly defining a housing for receiving a distal end of a guide of a second subassembly so that the exit face of this guide bears against said strip; the piece of flexible material is arranged in the receiving housing; the piece of flexible material is overmolded on the distal end of the optical guide of said second subassembly; the piece of flexible material is overmolded on the second structural element and on the face of the successive guides of the first subassembly defining said receiving housing.
According to characteristics specific to the constitution of the piece of flexible material, it can be provided that:
According to other features of the invention, taken alone or in combination, each optical guide comprises at least one lower face and one upper face which extend between the ends of the input face and the output face, the lower face being a reflection face. The optical guides are further defined by side faces extending similarly between the ends of the input face and the output face. This lower face may have a substantially elliptical shape, a first focus coincides with the location of a light emitting source disposed in proximity, particularly at the entrance face of the guide and a second focus is located at level of the exit face. The second focus of the lower face may be located at the contiguous edge of the upper face and the exit face.
It is intended to make the subassemblies or at least the optical guides of the subassemblies, or even the subassemblies, of a material allowing the propagation of light rays by total internal reflection from the input face to the output face. for example polycarbonate (PC) or polymethyl methacrylate (PMMA) or silicone or glass. Where appropriate, the optical guides may all be made of the same material.
Advantageously, the piece of translucent or transparent flexible material is made of a material having a refractive index substantially similar to, or even identical to that of the material of the optical guides.
And it is planned to make the piece of flexible material in a material having a greater flexibility than the flexibility of the material used to produce the optical guides. In particular, the flexible material may be a liquid silicone elastomer. 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.
In a particular application of the light device of the invention, 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.
In particular, the second means may consist of a first submodule arranged to produce a code-type beam, in particular having an oblique cut portion. And the projection device may be a lens but may take other forms known elsewhere.
It is notable that the second means comprise at least one optical means, especially of the reflector or collimator type, at least one light source disposed at a focus of the optical means and a cover, provided or not with a reflective coating, arranged in the path of the light rays from the light source and deflected by the optical means, 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. According to the invention, it can be provided that the contact with the cover is made at the level of the piece of flexible material. 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.
One can also provide a detection module on the road of a body not dazzle. 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.
It is advantageous to provide a lighting system in which at least one module according to the invention is disposed in a left projector, and at least one other module according to the invention is disposed in a straight projector. The module disposed in the left projector comprises a light device with a first subset of optical guides of a first type, and a second subset of optical guides of a second type, while the module disposed in the right projector. comprises a second light device with a first subset of optical guides of a third type and a second subset of optical guides of a second type, similar to the second subset of the first light device.
The modules can be 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, produced by the one of the modules covers at least one beam portion, in the example a segment, made by another of the modules. Other features and advantages of the present invention will appear more clearly with the help of the description and the drawings, among which: FIGS. 1 and 2 are perspective views of two constituent subassemblies of a light device according to a first embodiment of the invention; - Figure 3 is a perspective view of the two assembled subassemblies and a piece of flexible material adapted to overlap the distal ends of the optical guides of these two subassemblies; FIG. 4 is a front view of the light device according to a first embodiment, when the components of FIG. 3 are assembled; FIG. 5 is an overall view of a light module for a motor vehicle headlamp, in which the light device of FIG. 1 has been used; FIG. 6 is a front view of two subassemblies forming a light device according to a second embodiment; and FIGS. 7 and 8 are illustrations of alternative embodiments of a piece of flexible material in the light device of FIG. 6.
The light device 1 according to the invention is formed of two distinct subassemblies 2 and 4 that are assembled together and at least one piece of flexible material 5 able to bind said sub-assemblies together. -sets. A first embodiment will now be described with reference to FIGS. 1 to 4, in which the piece of flexible material 5 overlaps the ends of these two subassemblies 2,4.
The assembled device, visible in FIG. 4, comprises here five optical guides 6 among which there will be distinguished a central guide 8, two intermediate guides 10 and two lateral guides 12 arranged transversely in series so that one can successively find a lateral guide, an intermediate guide, the central guide, an intermediate guide and a lateral guide. The device also comprises first structural members 14 for holding the guides in position, which interconnect the corresponding proximal ends 16 of the guides.
Each optical guide 6 is adapted to guide by total internal reflection light rays emitted by a light source associated with the guide to direct them output of the guide to a projection device lens type. For this purpose, each guide has an input face 20 of the light arranged at the proximal end 16 of the optical guide and opposite which said light source is disposed, for example a semiconductor light source, in particular a chip of a light-emitting diode, and an exit face 22 of the light arranged at the distal end 18, as well as a lower face 24, referred to as reflection, and visible only in FIG. 5, and an upper face 26, before, which extend between the ends of the entrance face and the exit face, as well as lateral faces 27.
It will be understood that to enable the light rays to be guided inside the guides, each subassembly is made of a material that allows light rays to be guided by total internal reflection 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 height of an optical waveguide is defined arbitrarily as the dimension between the reflection face 24 and the front face 26, in a vertical direction, while the length of the guide is defined as the dimension between the entrance face and the exit face in a longitudinal direction, and that the width of the guide corresponds to the dimension in the transverse direction in which the guides are in series.
The reflection face 24 has a substantially elliptical shape, a first focus of which coincides with the location of the light source and a second focus of which is located at the contiguous edge 28 of the front face 26 and of the exit face 22, so that the light rays reflected in each optical guide out of the guide mainly at the top of the exit face 22.
The light device 1 has a substantially symmetrical arrangement on either side of the central guide 8, with the exception of the height of each symmetrical part. The height of the optical guides 6 is different depending on whether the guides are arranged on one side or the other of the central guide 8, and the central guide has an exit face 22 whose contiguous ridge 28 with the front face 26 is truncated to present a projection, vertical or oblique, so as to substantially form a step. As illustrated in the figures, the guides arranged to the right of the central guide 8, when looking at the device in front of the outlet faces 22 of the guides, have a lower height than the guides disposed to the left of the central guide. In other words, the central guide 8 has an outlet face 22 arranged to have a lateral edge, whose height corresponds to that of the distal end 18 of the guides arranged on one side of the central guide, another side edge , whose height corresponds this time to that of the distal end 18 of the guides disposed on the other side of the central guide, and an upper edge connecting the two side edges and having said projection.
The optical guides 6 are arranged, and held in position at least by the first structural members 14, so as to be in transverse series, 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 18 of the optical guides carrying the outlet faces 22 of the light are glued against each other and in which the respective proximal ends 16 carry input faces 20 of the light facing the light sources, are spaced transversely from one another. The proximal ends must be spaced, so that the light emitted by a light source to an optical guide does not penetrate into the neighboring optical guide, that to limit mutual heating of neighboring light sources, and the distal ends 18 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. As illustrated, it is advantageous for the distal ends 18 of the optical guides 6 to be pressed against each other by a predetermined distance, which may be approximately 1 mm by way of example, to form a portion of cover light segments and ensure continuous lighting when all segments are lit.
As has been stated, the luminous device is formed of two distinct subassemblies which are assembled together and which are at least partially connected by a piece of flexible material.
The first subassembly 2, illustrated in Figure 1, here comprises three optical guides arranged in series and spaced apart from each other, as well as structural elements connecting the corresponding proximal ends of these guides. The first subassembly here carries the central guide 8 and the lateral guides 12, spaced from the central guide at their distal end 18 by a distance substantially equal to the width of the intermediate guide 10 brought to be placed between them by assembling the two subsets, and a first portion 30 of the first structural members is disposed transversely to the subassembly, successively connecting each of the proximal ends 16 of the optical guides.
The second subassembly 4, visible in Figure 2, here comprises two optical guides arranged in series and spaced apart from each other, and a structural element connecting one end of each of the guides. The second subassembly here carries the intermediate guides 10 spaced from each other at their distal end 18 by a distance substantially equal to the width of the central guide 8 brought to be placed between them by assembling the two sub-assemblies. sets.
The second subassembly comprises a second portion 40 of the first structural elements formed by female / male means complementary to the male / female means forming the first part 30 of the first structural elements.
Each of the subassemblies is individually molded and the shape of these subassemblies, and the spacing provided between each adjacent optical guide of the same subassembly, allows easy demolding. The two subassemblies are then mounted relative to each other, by cooperation of the first portion 30 and the second portion 40 of the first structural elements. In this pre-assembly position, illustrated in FIG. 3, the guides are here pre-held relative to each other, with their distal end substantially in contact with the distal end of the neighboring guide, and their proximal end spaced apart from each other. the proximal end of the neighboring guide.
Two cases can appear during this pre-assembly. Two successive guides of the light device may have output faces offset longitudinally from one another, and two successive guides may not be perfectly in contact with one another at their distal end. This is notably due to the manufacturing tolerances of the two subassemblies.
In a subsequent step of the method of obtaining the light device according to the invention, the two subassemblies connected to each other are slid against a piece of flexible material 5, by applying the distal ends of the guides against this piece 5, as shown in Figure 3 by the direction of the arrow F. It is understood that one could without departing from the context of the invention to proceed otherwise to make the ends of the guides and the piece of flexible material integral, and in particular by overmolding the piece on the guides. The piece of flexible material 5 has a dimension along the transverse axis sufficiently large to overlap the set of successive guides, but it will be understood that one could provide a piece of flexible material 5 coming to recovery only two successive optical guides. The arrangement of the flexible material and the end of the guides embedded in this flexible material is such that the flexible material ensures a good mechanical strength of the assembly.
In an alternative embodiment, it will be possible to provide a means for holding the piece of flexible material in position, mechanically connected to at least a portion of the first structural elements. Advantageously, the holding means consists of a translucent or transparent plate so that that it can extend downstream of the piece of flexible material relative to the path of the light rays without hindering the propagation thereof.
The piece of flexible material 5 is advantageously made of transparent silicone, for example from the family of liquid silicone elastomers (known by the acronym LSR for "Liquid Silicon Rubber"). It is understood that it is important that the material chosen for the part 5, which must deform under the effect of the pressure of the optical guides 6, must be more flexible than that chosen for the optical guides. Preferably, the optical index of the material constituting the piece of flexible material 5 is substantially similar to, or even identical to that of the material making up the guides.
Under the effect of the pressure exerted, the inlet face 41 of the piece of flexible material 5, which is in contact with the guides, deforms and the flexible material is housed between the distal ends of the guides if they are not perfectly glued together. Furthermore, all the guides are pushed against the piece of flexible material 5 at least until the shortest optical guide in the longitudinal dimension is in contact with the input face 41 of the piece of flexible material . This ensures a continuity for the propagation of light rays. The exit face 42 of the piece of flexible material, disposed opposite the inlet face 41, is not deformed by the pressure exerted by the guides because of the thickness of the flexible material 5 and forms an exit face common to all the guides.
The light rays, emitted by the light sources and penetrating the optical guides by their respective input face, are reflected in each optical guide to the common output face 42 of the piece of flexible material, the rays deviated by a optical guide that can cross with the rays deviated by the adjacent optical guide at the piece of flexible material 5. This ensures a homogeneous light beam when all sources are lit, without creating a shadow between two segments beam.
Moreover, the role of this piece of flexible material is also to bind the optical guides together at their distal end without the need to provide very low manufacturing tolerances and therefore very expensive. The piece of flexible material 5 therefore has the role of absorbing, in three dimensions, the positioning offset of successive guides relative to a theoretical position in which the distal ends are in contact over a given distance and are aligned to form a regular plane of light output, and to provide a light output surface which is flat to facilitate its setting in position in a focal area of a projection system. The common exit face 42 to each of the guides is substantially flat, undistorted, while the entry face 41 of the piece of flexible material is deformed according to manufacturing defects and / or mounting clearance left between the guides. optical 6.
The device, created by assembling the two subassemblies and by superimposing a layer of flexible material covering the distal end of the guides, can then be fixed in the light module by a fixing support which has a transverse plate form having two transverse uprights on which rest the guides and two lateral fastening tabs, adapted to be reported on the structure of the module and ensure the establishment of the device at the desired location in the module.
FIG. 5 illustrates a light module in which the light device that has just been described is implanted. The module is a so-called bifunction module, that is to say a module in which two sub-modules 44, 46 are arranged one against the other in order to complement a "high beam" function and a function of "low beam", by projection of light beams to a projection optical device 48, 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.
It is particularly interesting to propose 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.
In at least one module of each projector formed of two sub-modules, the first sub-module is arranged to produce a first cut-off beam, to perform the "low beam" function, and 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". By 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 in particular on the path of the rays reflected by the first submodule 44 to allow in known manner the cutting of the first beam while the support plate carries the two sub-modules and their respective source (s) of light (s) ) and a cooling means, not shown here, of the assembly. The cover 50 has a cutoff edge 56 which has a curved profile, in particular by having an inclined plane, for example a form of step substantially in the center of the cutting edge. The central reflection zone is thus composed of two distinct parts offset vertically relative to each other, an inclined plane, for example 15 ° or 45 °, connecting them to form said step. Other types of profile may be provided, such as a profile without steps.
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 46 comprises on the one hand a plurality of light sources 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 optical guides. 6. The device and the diodes are positioned relative to each other, so that each source is able to cooperate with one of the optical guides to form images of these sources at a focal zone, in particular a curved focal surface P of the projection optical device, 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 according to the invention is arranged in the second submodule. The exit faces of the optical guides are turned towards the lens 48 and the input faces are turned towards a structural element on which are reported the light sources so that they are opposite the input face of the corresponding guide . Moreover, the reflection face is turned away from the cache while the front face is facing the cache. The device is arranged in the module so that the optical guides are in contact with the mask only in the vicinity of the curved focal surface Pf of the lens. This is the piece of flexible material 5 disposed in overlap of the distal end 18 of each optical guide 6 which is in contact with the cover 50, the line of contact between the piece of flexible material 5 and the cover 50 being in the surface. focal length Pf of the lens. In this arrangement, the piece of flexible material makes it possible to ensure sufficient contact between the guides and the cover to ensure, in addition to the good mechanical strength of the assembly as it has been previously stated, the absence of inhomogeneity between the beam code and the beam route: the first sub-module, arranged on one side of the cache allows to make the beam code, or beam cutoff, and the second sub-module, arranged on the other side of the cache, allows to make a second complementary beam of the code beam so that they together perform the road beam. The presence of the flexible material in contact with the cover smooths the differences in lighting that may exist in the junction zone of the two complementary beams.
This arrangement and the substantially elliptical shape of the reflection face of each guide, which as previously described allows the light rays to exit the guide at the top of the exit face, ensure that a portion of these rays reaches directly the lens in the upper part while another part is reflected by a lower face of the cover to reach the lens in the lower part.
Furthermore, the fact that it is the piece of flexible material that is in contact with the cover and that the exit face 42 is arranged in the focal surface Pf makes it possible to ensure that the areas of overlap of the images, formed at least by the thickness of the piece of flexible material, are arranged upstream of the focal surface of the lens, which allows to project a complementary beam whose different portions are smoothed to avoid vertical cutting, in the case of segmentation beam, too much net.
The light sources each consist of a semiconductor source, and for example a light emitting diode chip attached to a printed circuit board, or directly attached to structural elements of the device. The light sources are arranged in transverse series, with a difference between each source, which may advantageously be between 5 and 10 mm and which is substantially equal to the transverse spacing between two successive optical guide input faces of the luminous 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 18 cooperates with the inclined plane of the cache. In this way, the intermediate optical guides 10 and lateral 12 extend transversely on either side of this inclined plane of the cache. Given that the vehicle has two projectors, one on the left and one on the right, the superposition of the two beams left and right gives a complete complementary road beam in which each segment of the road beam can be either strongly illuminated by the lighting of the two segments. corresponding left and right beams, either partially illuminated by the illumination of the segment of one of the beams or by the illumination of the segment of the other beam, or extinguished completely. Moreover, it is interesting to note that according to the invention, a luminous device can according to the invention be implanted indifferently in the module of a left projector or in the module of a right projector, which simplifies the mounting of the projectors .
In the illustrated example, there are five light sources for as many optical guides, but it will be understood that the number may be different and not necessarily odd in this case, since the light device is made by two subsets of guides that one comes to arrange between each other and that one seeks to join at one of their end by the presence of an insert made of flexible material.
A second embodiment will now be described, with particular reference to FIGS. 6 to 8, in which the structure of the subassemblies differs from the first embodiment in that the first subassembly 2 carries second structural elements 58 which allow the holding of at least some of the optical guides together at the distal end.
These second structural elements have the shape of two plates disposed on either side of the central guide 8 extending transversely the distal end 18 of the central guide to overlap the outlet faces 22 of the lateral optical guides 12. The plates form and a strip 60 made of translucent or transparent material and disposed transversely, downstream of said distal ends 18 in the path of the light rays.
As illustrated in FIG. 6, the strip 60 and two successive optical guides of the first subassembly 2 define a receiving housing 62 of dimensions adapted to accommodate a distal end 18 of a guide of a second subassembly 4. , it being understood that when the two subassemblies are assembled, the outlet face 22 of the guide of the second subassembly 4 must come opposite said band 60.
A piece of flexible material 5 is disposed in the receiving housing, to take place between the outlet face 22 and the band 60 and / or to take place between the side faces 27 of the guides defining the housing 62 and the guide of the second sub -Set 4 being inserted into the housing 62. The piece of flexible material 5 may be overmolded on the distal end 18 of the guide of said second subassembly 4 (Figure 7) so as to extend substantially in the longitudinal direction said guide or it can be arranged in the housing 62, both on the strip 60 and on the faces of the successive guides of the first subassembly 2, to be deformed during insertion of the guide of the second subassembly 4 (FIG. 8). In both cases, the flexible material makes it possible to fill the space that can be formed between two successive guides of the device when the subassemblies are assembled, or between the distal end of a guide and the band forming the second structural elements.
The foregoing description clearly explains how the invention makes it possible to achieve the objectives that it has set itself and in particular to propose a light device that facilitates the design and manufacture of a plurality of optical guides and their installation. in a module facing light sources for guiding light beams and creating an adaptive beam.
The device is particularly easy to obtain by molding, because of the design in two subassemblies in each of which are provided large spaces left between each optical guide. Tooling and corresponding molds are thus easier and less expensive to design, and manufacturing losses less important. And the use of an insert of flexible material, to overlap at least one distal end of one of the guides to make the binder with at least one neighboring guide, allows to consider the design of these sub-components. assemblies by providing operating clearances so that assembly of the subassemblies does not require force to insert a guide of a subassembly between two guides of another subassembly, which can lead to the deterioration of one of the guides.
As may have been specified, the presence of the piece of flexible material at the end of the guides also makes it possible to compensate for misalignment of the outlet faces of the guides between them, to provide a uniform and substantially flat exit face. .
It is particularly interesting that this piece of flexible material is disposed between the output faces of the guides and the projection optical device, and that it is translucent or transparent, to form an exit face of the light without transverse discontinuities that otherwise form shadows in the beam projected thereafter.
Of course, various modifications may be made by those skilled in the art to the structure of the light device which has just been described by way of non-limiting example, in particular in the number of optical guides and in the shape of the structural elements of the subframes. -Sets, since the light device comprises according to the invention a plurality of optical guides carried by a plurality of subassemblies and an insert of flexible material to bind together at least two guides at their distal end. In any event, 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.

权利要求:
Claims (17)
[1" id="c-fr-0001]
A luminous device (1) comprising a series of optical guides (6) each capable of guiding light rays between an input face (20) arranged at a proximal end (16) of the optical guide, and a face of outlet (22), characterized in that it is formed of at least two subassemblies (2, 4) made distinctly and each comprising at least a part of said series of optical guides and first structural elements (14) of holding the guides in position connecting together successive optical guides of said subassembly, the two subassemblies being able to be assembled to form said device, and characterized in that the distal ends of at least two successive optical waveguides of the series are connected by a piece of flexible material (5) translucent or transparent.
[2" id="c-fr-0002]
2. Lighting device according to claim 1, characterized in that the optical guides (6) are arranged so that the respective distal end (18), carrying the exit face, of two adjacent guides are in contact with one another. on the other and so that the respective proximal end (16), carrying the input face (20), of these two adjacent guides are spaced transversely from one another.
[3" id="c-fr-0003]
3. Light device according to one of the preceding claims, characterized in that the distal end (18) of each of the optical guides (6) is covered by the piece of flexible material (5) which forms a continuous strip extending downstream of the entire series of guides.
[4" id="c-fr-0004]
4. Lighting device according to claim 3, characterized in that the piece of flexible material (5) has a continuous face which extends opposite the optical guides (6) and which forms a common output face (42). to the guides of the luminous device.
[5" id="c-fr-0005]
5. Light device according to one of the preceding claims, characterized in that the piece of flexible material is disposed between at least two distal ends (18) of two optical guides (6) successive device.
[6" id="c-fr-0006]
6. Lighting device according to one of the preceding claims, characterized in that at least a first subassembly (2) further comprises a second structural element (58), distinct from the first structural element (14) and able to connect the distal ends (18) of the optical guides (6) of this first subassembly.
[7" id="c-fr-0007]
7. Light device according to the preceding claim, characterized in that the second structural element (58) consists of a strip made of translucent or transparent material and disposed transversely, downstream of said distal ends (18) in the path of the light rays, said band and two successive guides of this first subassembly (2) defining a receiving housing of a distal end (18) of a guide of a second subassembly (4) so that the exit face of this guide comes in support of said band.
[8" id="c-fr-0008]
8. Lighting device according to the preceding claim, characterized in that said piece of flexible material (5) is disposed in said receiving housing.
[9" id="c-fr-0009]
9. Light device according to claim 7, characterized in that said piece of flexible material (5) is overmolded on the second structural element (58) and on the face of the successive guides of the first subassembly (2) defining said housing. reception.
[10" id="c-fr-0010]
10. Light device according to one of the preceding claims, characterized in that the piece of translucent or transparent flexible material is made of a material having a refractive index substantially similar to or identical to that of the material of the optical guides.
[11" id="c-fr-0011]
11. Light device according to one of the preceding claims, characterized in that the piece of flexible material (5) is made of a material having a greater flexibility than the flexibility of the material used to produce the optical guides (6).
[12" id="c-fr-0012]
12. A light module adapted to be mounted in a motor vehicle headlight, characterized in that it comprises first means comprising a light device (1) according to one of the preceding claims to participate in the production of a plurality of segments. light activated selectively.
[13" id="c-fr-0013]
13. Lighting module for lighting and / or signaling of a motor vehicle according to the preceding claim, characterized in that said module comprising second means, arranged to produce a first cut-off beam directed to a projection device arranged in 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 activated simultaneously.
[14" id="c-fr-0014]
14. Light module according to the preceding claim, characterized in that the second means comprise at least one optical means, at least one light source disposed at a focus of the optical means and a cover (50) disposed on the path of the spokes. light from the light source and deflected by the optical means for the realization of the cut-off beam, and in that the optical guides (6) of the light device (1) are arranged to be in contact with the cache.
[15" id="c-fr-0015]
15. Light module according to the preceding claim, characterized in that the optical guides (6) are oriented so as to be in contact with the cover (50) only in the vicinity of the focal area of the projection device.
[16" id="c-fr-0016]
16. Light module according to one of claims 14 or 15, characterized in that the contact with the cover (50) is formed at the piece of flexible material (5).
[17" id="c-fr-0017]
17. Lighting system comprising at least one light module according to one of claims 12 to 16 and control means for turning on, off or change the light power emitted by the first and second means of the light module.

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同族专利:

公开号 | 公开日

EP3159599A1|2017-04-26|

CN106969308A|2017-07-21|

FR3042845B1|2019-11-29|

US9939120B2|2018-04-10|

CN106969308B|2021-04-09|

US20170114976A1|2017-04-27|

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法律状态:
2016-10-28| PLFP| Fee payment|Year of fee payment: 2 |

2017-04-28| PLSC| Publication of the preliminary search report|Effective date: 20170428 |

2017-10-31| PLFP| Fee payment|Year of fee payment: 3 |

2018-10-30| PLFP| Fee payment|Year of fee payment: 4 |

2019-10-31| PLFP| Fee payment|Year of fee payment: 5 |

2020-10-30| PLFP| Fee payment|Year of fee payment: 6 |

2021-10-29| PLFP| Fee payment|Year of fee payment: 7 |

优先权:

申请号 | 申请日 | 专利标题

FR1560145|2015-10-23|

FR1560145A|FR3042845B1|2015-10-23|2015-10-23|LIGHT DEVICE WITH OPTICAL GUIDES|FR1560145A| FR3042845B1|2015-10-23|2015-10-23|LIGHT DEVICE WITH OPTICAL GUIDES|

US15/296,470| US9939120B2|2015-10-23|2016-10-18|Lighting device with optical waveguides|

EP16195007.6A| EP3159599A1|2015-10-23|2016-10-21|Light-emitting device with optical waveguides|

CN201610926100.6A| CN106969308B|2015-10-23|2016-10-24|Lighting device with optical waveguide|

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