EP2880359A1 - Light guide(s) lighting device on which the rear face has a conical profile and which has diffusion elements defined along a focal line - Google Patents

Light guide(s) lighting device on which the rear face has a conical profile and which has diffusion elements defined along a focal line

Info

Publication number
EP2880359A1
EP2880359A1 EP13747471.4A EP13747471A EP2880359A1 EP 2880359 A1 EP2880359 A1 EP 2880359A1 EP 13747471 A EP13747471 A EP 13747471A EP 2880359 A1 EP2880359 A1 EP 2880359A1
Authority
EP
European Patent Office
Prior art keywords
light
light source
diffusion
photons
rear face
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.)
Withdrawn
Application number
EP13747471.4A
Other languages
German (de)
French (fr)
Inventor
Whilk Marcelino GONCALVES
Michel Surugue
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP2880359A1 publication Critical patent/EP2880359A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces

Definitions

  • the invention relates to lighting devices which comprise at least one light guide coupled to at least one light source.
  • the term "lighting device” is understood here to mean a light device capable of providing a lighting or signaling function, or a decorative light effect.
  • At least one light guide which extends along a line (possibly of curvilinear type) and which has two opposite ends, at least one of which is coupled to a source of light charged to supply photons, and a heart delimited by front and rear faces.
  • Photons propagate in the heart by total reflection on the inner faces and are transferred outwardly to at least partially fill a photometric function and / or ensure a luminous style effect.
  • This type of light guide offers neither a good performance nor a variety of light style effects because of the difficulty of transferring photons to the outside via its front, it has been proposed to place a concave reflector in front of his face back or to define a relief on its back face to reflect the photons in a preferred way to its front face.
  • These solutions certainly make it possible to significantly improve the photon transfer efficiency towards the front face, but they do not make it possible to substantially increase the variety of luminous style effects and thus the possibilities of generating light signatures. Thus, they do not easily allow the introduction of depth effects, volume effects (or 3D) or brightness gradient effects, especially when certain photometric performance must be achieved to meet regulation.
  • the invention therefore aims to propose an alternative solution to improve the situation.
  • a lighting device comprising at least one light guide extending along a line and having two opposite ends, at least one of which is coupled to a source of light generating photons, and a delimited core. by front and back faces.
  • the front face has a first conical profile and the rear face is metallized and has a second conical profile associated with a focus line located in the heart, and
  • the heart comprises on at least part of the focus line at least one diffusion element which is able to return certain photons which reach it towards the rear face so that the latter reflects them towards the front face following directions which are substantially parallel to a predefined direction, to define at least one light beam at least partially filling a photometric function and / or providing a light style effect.
  • a very large variety of luminous style effects (3D effects, depth effect, control of the luminous density of the photometric function, control of the homogeneity) and / or different photometric functions can thus be obtained without additional components must be used.
  • the lighting device according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular:
  • each diffusion element can be defined in the core in the form of a cloud of scattering points by a laser beam
  • each diffusion element may have an overall shape which is chosen from (at least) a frustoconical shape and a cylindrical shape;
  • the diffusion elements may have a global shape and / or a variable density and / or dispersion depending on their distance by relation to the light source;
  • the diffusion elements may have a cross section which increases with their distance from the light source
  • the density of the scattering elements can increase with their distance from the light source
  • the dispersion of the diffusion elements can decrease with their distance from the light source
  • the first profile can be semi-circular
  • the second profile can be semi-parabolic
  • it may comprise at least two light guides coupled respectively to at least two light sources;
  • the end which is opposite to the light source can be metallized in order to reflect towards the heart the photons which reach it.
  • the two ends may be respectively coupled to two light sources.
  • the invention also proposes an optical unit comprising at least one lighting device of the type of that presented above.
  • the invention may for example be used in the field of vehicles, possibly of the automotive type.
  • FIG. 1 schematically illustrates, in a perspective view, an exemplary embodiment of a lighting device according to the invention
  • FIG. 2 schematically illustrates, in a sectional view, photon paths reflected by a diffusion element of the lighting device of FIG. 1.
  • the object of the invention is to provide a lighting device D with a light guide (s) GL, which makes it possible, at least partially, to fill a photometric function and / or to allow many lighting style effects.
  • the lighting device D is intended to be part of an optical block (no shown) of a vehicle, possibly of automobile type. But the invention is not limited to this application.
  • a lighting device D according to the invention can indeed equip any type of system, equipment or device, including interior or exterior building walls (possibly by providing additional sealing means to protect the electronics). .
  • the optical block can be both a headlight (or front projector), a taillight.
  • a lighting device D can provide, or participate in, a daytime running light function (or DRL (for "Daytime running Light (Gold Lamp)" - light signaling automatically lit when the vehicle is put in operation)) or third brake light (rear).
  • the direction X is a so-called longitudinal direction
  • the direction Y is a so-called transverse direction, which is substantially perpendicular to the longitudinal direction X
  • the direction Z is a so-called vertical direction, which is substantially perpendicular to the directions longitudinal X and transverse Y.
  • FIG. 1 shows an exemplary embodiment of a lighting device D according to the invention.
  • a lighting device D comprises at least one light guide GL and at least one light source SL.
  • the (lighting) device D has only one light guide GL. But it could comprise several, at least two, possibly arranged in a sheet, possibly of different shapes, and each having at least one end associated with a light source SL.
  • Each light guide GL has two ends E1 and E2 which are opposed to one another and at least one of which is coupled to a light source SL.
  • the (light) photons which are generated by a light source SL, penetrate through an end face of the light guide GL, which is here at its first end E1, and propagate internally in its heart CG which is surrounded by FV front and rear faces. Note that the photons are guided in total reflection within the light guide GL.
  • Each light source SL may comprise at least one light-emitting diode (or LED) or a laser diode whose photon-emitting end is placed substantially against an end face of the first end E1 of the light guide GL, which has been chosen. for the injection of photons.
  • This support plate may for example be a printed circuit board, of the PCB type ("Printed Circuit Board”), rigid or flexible (“type” Flex ").
  • Each light-emitting diode or laser diode SL may be coupled to the light guide GL either directly, for example by gluing or by embedding in a hole defined in its injection end face, or indirectly, for example via the support plate. Furthermore, each light-emitting diode or laser diode SL may be arranged to emit white light or a colored light. On the other hand, in the presence of at least two light-emitting diodes or laser diodes SL, the latter can be arranged to emit different or identical light colors.
  • Each (the) light guide GL extends along a line which, in the nonlimiting example illustrated, is a straight line parallel to the transverse direction Y. But each light guide GL could extend along a curvilinear line presenting the less a curvature. When the line has several curvatures (at least two), the latter may be possibly in different planes. Note that in the presence of several light guides GL, the latter (GL) may have different shapes (and therefore possible curvatures).
  • each GL light guide can be made of plastic or glass.
  • the front face FV of the light guide GL has a first conical profile and the rear face FR is metallized and has a second conical profile associated with a focus line LF which is located in the core CG.
  • Each conical profile is obtained by "extruding" within a conical surface in a given direction.
  • the rear face FR is defined by a displacement of a conic along the line along which the light guide GL extends, the latter does not therefore have a single focus but a focus line LF.
  • the rear face FR is defined by the translation of a parabola along the transverse direction Y and therefore the light guide GL has a linear LF line of focus (parallel to the transverse direction Y).
  • the first profile is semi-circular and the second profile is semi-parabolic. But other profiles can be considered when it comes to conical profiles.
  • the core CG comprises, on at least part of the focus line LF, at least one diffusion element ED which is adapted to return certain photons which reach it towards the rear face FR so that the latter (FR) reflect them towards the front face FV following directions which are substantially parallel to the predefined direction (here X), to define at least one light beam at least partially filling a photometric function and / or providing a light style effect.
  • at least one diffusion element ED which is adapted to return certain photons which reach it towards the rear face FR so that the latter (FR) reflect them towards the front face FV following directions which are substantially parallel to the predefined direction (here X), to define at least one light beam at least partially filling a photometric function and / or providing a light style effect.
  • the expression "fill at least partially” means here that the device D provides at least one beam which will then be treated (for example by a reflector or a screen or a lens of its optical block) in order to perform a photometric function, or else that is not processed and therefore performs a photometric function.
  • a "diffusion element” is here a defined element in the mass of the heart CG in order to deflect photons that reach it in any direction of space. Once illuminated, the diffusion element ED therefore behaves as a secondary light source, part of the radiation of which will reach the rear face FR (metallized).
  • this rear face FR is a parabolic cylinder and the light source is substantially located on the focus line LF of the parabola, the photons reflected by this light source are reflected by the rear face FR in a direction which is substantially parallel to the light source. axis of the parable.
  • the ED element line (s) and the rear face FR shine.
  • each diffusion element ED is produced in the form of a cloud of scattering points (or centers) by means of a laser beam which is focused substantially on the focal line LF in order to locally burn or deform the material constituting the CG heart.
  • the diffusion elements ED may have different global shapes as soon as they are adapted to the scattering of photons, as shown in FIG. 2.
  • the typical size of a diffusing point (or center) is of the order micron.
  • the spatial distribution of scattering points constituting an ED diffusion element may be of frustoconical or cylindrical shape.
  • the axis of the cones or cylinders is substantially aligned in the transverse direction Y.
  • the diameter of the cross section (in the plane XZ) of a diffusion element ED can be equal to about 1 mm.
  • the diffusion elements ED may have a global shape and / or a density and / or a dispersion which varies (nt) as a function of their distance from the light source SL, according to the needs, and in particular according to the desired light style effect.
  • the diffusion elements ED may have a cross section (in the XZ plane) which increases with their distance from the light source SL, so as to provide at the output of the front face FV at least one light beam reflected of substantially constant intensity, and therefore homogeneous. It will be understood, in fact, that the further away the light source SL, the lower the number of photons is, and therefore the larger the cross section of a diffusion element ED must be to increase the probability that it can be reached by photons.
  • the density of a diffusion element ED (that is to say the number of scattering points of its cloud per mm 2 ) can increase with the distance of the latter (ED) from the light source SL.
  • This also makes it possible to provide at the output of the front face FV at least one reflected light beam whose luminance is substantially constant, and therefore the appearance lit homogeneous. It will be understood, in fact, that the further away the light source SL, the lower the number of photons is, and therefore the greater the density of a diffusion element ED must be large to increase the probability that it can be reached by photons at constant volume.
  • the dispersion (or the distance between) of the diffusion elements ED may decrease with the distance of the latter (ED) relative to the light source SL.
  • This also makes it possible to offer at the output of the front face FV at least one reflected light beam whose luminance is substantially constant, and therefore the aspect lit homogeneous. It will be understood that the further away from the light source SL, the lower the number of photons, and therefore the smaller the dispersion of the scattering elements ED must be to increase the probability that they may be reached by photons, at constant volume.
  • volume effect means a volume effect giving an observer an impression of mass and / or thickness and / or fleshiness when the device D operates.
  • the invention offers several advantages, among which:

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A lighting device (D) comprises at least one light guide (GL) extending along a line and comprising two opposite ends (E1, E2), of which at least one is coupled to a light source (SL) generating photons, and a core (CG) delimited by a front face (FV) having a first conical profile and a rear face (FR) that is metalized and has a second conical profile associated with a focal line (LF) located within the core (CG). The core (CG) comprises, on the focal line (LF), at least one diffusion element (ED) capable of directing photons that reach it toward the rear face (FR) so that it reflects them toward the front face (FV) in directions substantially parallel to a predefined direction, so as to define at least one beam of light that at least partially performs a photometric function and/or provides a stylistic lighting effect.

Description

DISPOSITIF D'ÉCLAIRAGE À GUIDE(S) DE LUMIÈRE À FACE ARRIÈRE À PROFIL DE CONIQUE ET À ÉLÉMENTS DE DIFFUSION DÉFINIS SUR UNE LIGNE DE FOYER  BACKLIGHT LIGHT-GUIDE LIGHT DEVICE WITH CONICAL PROFILE AND DIFFUSION ELEMENTS DEFINED ON A HOME LINE
L'invention concerne les dispositifs d'éclairage qui comportent au moins un guide de lumière couplé à au moins une source de lumière. The invention relates to lighting devices which comprise at least one light guide coupled to at least one light source.
On entend ici par « dispositif d'éclairage » un dispositif lumineux pouvant assurer une fonction d'éclairage ou de signalisation, ou bien un effet lumineux décoratif.  The term "lighting device" is understood here to mean a light device capable of providing a lighting or signaling function, or a decorative light effect.
Dans certains domaines, comme par exemple celui des véhicules, éventuellement de type automobile, on utilise, par exemple au sein d'un bloc optique, au moins un guide de lumière qui s'étend suivant une ligne (éventuellement de type curviligne) et qui comporte deux extrémités opposées, dont l'une au moins est couplée à une source de lumière chargée de l'alimenter en photons, et un cœur délimité par des faces avant et arrière. Les photons se propagent dans le cœur par réflexion totale sur les faces internes et sont transférés vers l'extérieur afin de remplir au moins partiellement une fonction photométrique et/ou assurer un effet de style lumineux.  In some fields, such as for example vehicles, possibly of the automotive type, use is made, for example within an optical block, of at least one light guide which extends along a line (possibly of curvilinear type) and which has two opposite ends, at least one of which is coupled to a source of light charged to supply photons, and a heart delimited by front and rear faces. Photons propagate in the heart by total reflection on the inner faces and are transferred outwardly to at least partially fill a photometric function and / or ensure a luminous style effect.
Ce type de guide de lumière offrant ni un bon rendement ni une variété d'effets de style lumineux du fait de la difficulté du transfert des photons vers l'extérieur via sa face avant, il a été proposé de placer un réflecteur concave devant sa face arrière ou bien de définir un relief sur sa face arrière afin de réfléchir les photons de façon privilégiée vers sa face avant. Ces solutions permettent certes d'améliorer notablement le rendement de transfert des photons vers la face avant, mais elles ne permettent pas d'accroître sensiblement la variété d'effets de style lumineux et donc les possibilités de génération de signatures lumineuses. Ainsi, elles ne permettent pas facilement l'introduction d'effets de profondeur, d'effets de volume (ou 3D) ou d'effets de gradient de luminosité, notamment lorsque certaines performances photométriques doivent être atteintes pour respecter une réglementation. This type of light guide offers neither a good performance nor a variety of light style effects because of the difficulty of transferring photons to the outside via its front, it has been proposed to place a concave reflector in front of his face back or to define a relief on its back face to reflect the photons in a preferred way to its front face. These solutions certainly make it possible to significantly improve the photon transfer efficiency towards the front face, but they do not make it possible to substantially increase the variety of luminous style effects and thus the possibilities of generating light signatures. Thus, they do not easily allow the introduction of depth effects, volume effects (or 3D) or brightness gradient effects, especially when certain photometric performance must be achieved to meet regulation.
L'invention a donc pour but de proposer une solution alternative propre à améliorer la situation.  The invention therefore aims to propose an alternative solution to improve the situation.
Elle propose à cet effet un dispositif d'éclairage comprenant au moins un guide de lumière s'étendant suivant une ligne et comportant deux extrémités opposées, dont l'une au moins est couplée à une source de lumière générant des photons, et un cœur délimité par des faces avant et arrière.  It proposes for this purpose a lighting device comprising at least one light guide extending along a line and having two opposite ends, at least one of which is coupled to a source of light generating photons, and a delimited core. by front and back faces.
Ce dispositif d'éclairage se caractérise par le fait :  This lighting device is characterized by the fact:
- que la face avant présente un premier profil de conique et la face arrière est métallisée et présente un second profil de conique associé à une ligne de foyer située dans le cœur, et  the front face has a first conical profile and the rear face is metallized and has a second conical profile associated with a focus line located in the heart, and
- que le cœur comprend sur au moins une partie de la ligne de foyer au moins un élément de diffusion qui est propre à renvoyer certains photons qui l'atteignent vers la face arrière afin que cette dernière les réfléchissent vers la face avant suivant des directions qui sont sensiblement parallèles à une direction prédéfinie, pour définir au moins un faisceau de lumière remplissant au moins partiellement une fonction photométrique et/ou assurant un effet de style lumineux.  the heart comprises on at least part of the focus line at least one diffusion element which is able to return certain photons which reach it towards the rear face so that the latter reflects them towards the front face following directions which are substantially parallel to a predefined direction, to define at least one light beam at least partially filling a photometric function and / or providing a light style effect.
Une très grande variété d'effets de style lumineux (effets 3D, effet de profondeur, contrôle de la densité lumineuse de la fonction photométrique, contrôle de l'homogénéité) et/ou différentes fonctions photométriques peuvent être ainsi obtenu(e)s, sans qu'il faille utiliser de composants additionnels.  A very large variety of luminous style effects (3D effects, depth effect, control of the luminous density of the photometric function, control of the homogeneity) and / or different photometric functions can thus be obtained without additional components must be used.
Le dispositif d'éclairage selon l'invention peut comporter d'autres caractéristiques qui peuvent être prises séparément ou en combinaison, et notamment :  The lighting device according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular:
- chaque élément de diffusion peut être défini dans le cœur sous la forme d'un nuage de points diffusants par un faisceau laser ;  each diffusion element can be defined in the core in the form of a cloud of scattering points by a laser beam;
- chaque élément de diffusion peut avoir une forme globale qui est choisie parmi (au moins) une forme tronconique et une forme cylindrique ;  each diffusion element may have an overall shape which is chosen from (at least) a frustoconical shape and a cylindrical shape;
- les éléments de diffusion peuvent avoir une forme globale et/ou une densité et/ou une dispersion variable(s) en fonction de leur éloignement par rapport à la source de lumière ; the diffusion elements may have a global shape and / or a variable density and / or dispersion depending on their distance by relation to the light source;
les éléments de diffusion peuvent présenter une section transverse qui croît avec leur éloignement par rapport à la source de lumière ;  the diffusion elements may have a cross section which increases with their distance from the light source;
la densité des éléments de diffusion peut croître avec leur éloignement par rapport à la source de lumière ;  the density of the scattering elements can increase with their distance from the light source;
la dispersion des éléments de diffusion peut décroître avec leur éloignement par rapport à la source de lumière ;  the dispersion of the diffusion elements can decrease with their distance from the light source;
- le premier profil peut être semi circulaire ;  the first profile can be semi-circular;
- le second profil peut être semi parabolique ;  the second profile can be semi-parabolic;
- il peut comprendre au moins deux guides de lumière couplés respectivement à au moins deux sources de lumière ;  it may comprise at least two light guides coupled respectively to at least two light sources;
- l'extrémité qui est opposée à la source de lumière peut être métallisée afin de réfléchir vers le cœur les photons qui l'atteignent. En variante, les deux extrémités peuvent être respectivement couplées à deux sources de lumière.  the end which is opposite to the light source can be metallized in order to reflect towards the heart the photons which reach it. Alternatively, the two ends may be respectively coupled to two light sources.
L'invention propose également un bloc optique comprenant au moins un dispositif d'éclairage du type de celui présenté ci-avant.  The invention also proposes an optical unit comprising at least one lighting device of the type of that presented above.
L'invention peut par exemple être utilisée dans le domaine des véhicules, éventuellement de type automobile.  The invention may for example be used in the field of vehicles, possibly of the automotive type.
D'autres caractéristiques et avantages de l'invention apparaîtront à l'examen de la description détaillée ci-après, et des dessins annexés, sur lesquels :  Other features and advantages of the invention will appear on examining the detailed description below, and the attached drawings, in which:
- la figure 1 illustre schématiquement, dans une vue en perspective, un exemple de réalisation d'un dispositif d'éclairage selon l'invention, et FIG. 1 schematically illustrates, in a perspective view, an exemplary embodiment of a lighting device according to the invention, and
- la figure 2 illustre schématiquement, dans une vue en coupe, des trajets de photons réfléchis par un élément de diffusion du dispositif d'éclairage de la figure 1 . FIG. 2 schematically illustrates, in a sectional view, photon paths reflected by a diffusion element of the lighting device of FIG. 1.
L'invention a pour but d'offrir un dispositif d'éclairage D à guide(s) de lumière GL, qui permet de remplir au moins partiellement une fonction photométrique et/ou autorise de nombreux effets de style lumineux.  The object of the invention is to provide a lighting device D with a light guide (s) GL, which makes it possible, at least partially, to fill a photometric function and / or to allow many lighting style effects.
Dans ce qui suit, on considère, à titre d'exemple non limitatif, que le dispositif d'éclairage D est destiné à faire partie d'un bloc optique (non représenté) d'un véhicule, éventuellement de type automobile. Mais l'invention n'est pas limitée à cette application. Un dispositif d'éclairage D, selon l'invention, peut en effet équiper tout type de système, équipement ou dispositif, y compris des murs intérieurs ou extérieurs de bâtiment (éventuellement en prévoyant des moyens d'étanchéité additionnels pour protéger l'électronique). In the following, it is considered, by way of nonlimiting example, that the lighting device D is intended to be part of an optical block (no shown) of a vehicle, possibly of automobile type. But the invention is not limited to this application. A lighting device D according to the invention can indeed equip any type of system, equipment or device, including interior or exterior building walls (possibly by providing additional sealing means to protect the electronics). .
On notera que le bloc optique peut être aussi bien un phare (ou projecteur avant), qu'un feu arrière. A titre d'exemples non limitatifs, un dispositif d'éclairage D peut assurer, ou participer à, une fonction de feu diurne (ou DRL (pour « Daytime running Light (or Lamp) » - signalisation lumineuse allumée automatiquement lorsque le véhicule est mis en fonctionnement)) ou de troisième feu de stop (arrière).  Note that the optical block can be both a headlight (or front projector), a taillight. As non-limiting examples, a lighting device D can provide, or participate in, a daytime running light function (or DRL (for "Daytime running Light (Gold Lamp)" - light signaling automatically lit when the vehicle is put in operation)) or third brake light (rear).
Sur les figures 1 et 2 la direction X est une direction dite longitudinale, la direction Y est une direction dite transversale, laquelle est sensiblement perpendiculaire à la direction longitudinale X, et la direction Z est une direction dite verticale, laquelle est sensiblement perpendiculaire aux directions longitudinale X et transversale Y.  In FIGS. 1 and 2, the direction X is a so-called longitudinal direction, the direction Y is a so-called transverse direction, which is substantially perpendicular to the longitudinal direction X, and the direction Z is a so-called vertical direction, which is substantially perpendicular to the directions longitudinal X and transverse Y.
On se réfère à la figure 1 pour présenter un exemple de réalisation d'un dispositif d'éclairage D selon l'invention.  Referring to Figure 1 to show an exemplary embodiment of a lighting device D according to the invention.
Comme illustré, un dispositif d'éclairage D, selon l'invention, comprend au moins un guide de lumière GL et au moins une source de lumière SL.  As illustrated, a lighting device D according to the invention comprises at least one light guide GL and at least one light source SL.
Dans l'exemple non limitatif illustré sur la figure 1 , le dispositif (d'éclairage) D ne comporte qu'un seul guide de lumière GL. Mais il pourrait en comporter plusieurs, au moins deux, éventuellement agencés en nappe, éventuellement de formes différentes, et présentant chacun au moins une extrémité associée à une source de lumière SL.  In the nonlimiting example illustrated in Figure 1, the (lighting) device D has only one light guide GL. But it could comprise several, at least two, possibly arranged in a sheet, possibly of different shapes, and each having at least one end associated with a light source SL.
Chaque guide de lumière GL comporte deux extrémités E1 et E2 qui sont opposées l'une à l'autre et dont l'une au moins est couplée à une source de lumière SL.  Each light guide GL has two ends E1 and E2 which are opposed to one another and at least one of which is coupled to a light source SL.
Dans l'exemple non limitatif illustré sur la figure 1 , seule la première E1 des deux extrémités du guide de lumière GL est couplée à une source de lumière SL. Mais on peut envisager que les deux extrémités E1 et E2 soient chacune couplées à une source de lumière SL de manière à renforcer l'homogénéité et/ou l'intensité de l'éclairement assuré par le guide de lumière GL, et/ou à créer un effet de style. In the nonlimiting example illustrated in FIG. 1, only the first E1 of the two ends of the light guide GL is coupled to a light source SL. But we can consider that the two ends E1 and E2 are each coupled to a light source SL so as to enhance the homogeneity and / or intensity of the illumination provided by the light guide GL, and / or to create a stylistic effect.
Les photons (de lumière), qui sont générés par une source de lumière SL, pénètrent par une face d'extrémité du guide de lumière GL, qui est ici située au niveau de sa première extrémité E1 , et se propagent intérieurement dans son cœur CG qui est entouré par des faces avant FV et arrière. On notera que les photons sont guidés en réflexion totale à l'intérieur du guide de lumière GL.  The (light) photons, which are generated by a light source SL, penetrate through an end face of the light guide GL, which is here at its first end E1, and propagate internally in its heart CG which is surrounded by FV front and rear faces. Note that the photons are guided in total reflection within the light guide GL.
Chaque source de lumière SL peut comprendre au moins une diode électroluminescente (ou LED) ou une diode laser dont une extrémité émettrice de photons est placée sensiblement contre une face d'extrémité de la première extrémité E1 du guide de lumière GL, qui a été choisie pour l'injection de photons.  Each light source SL may comprise at least one light-emitting diode (or LED) or a laser diode whose photon-emitting end is placed substantially against an end face of the first end E1 of the light guide GL, which has been chosen. for the injection of photons.
On notera que lorsque l'on utilise des diodes électroluminescentes ou des diodes laser, il est avantageux qu'elles soient montées sur une plaque de support destinée à permettre au moins leur contrôle et leur alimentation électrique. Cette plaque de support peut par exemple être une carte à circuits imprimés, de type PCB (« Printed Circuit Board »), rigide ou flexible (« de type « Flex »).  Note that when using light-emitting diodes or laser diodes, it is advantageous that they are mounted on a support plate to allow at least their control and their power supply. This support plate may for example be a printed circuit board, of the PCB type ("Printed Circuit Board"), rigid or flexible ("type" Flex ").
Chaque diode électroluminescente ou diode laser SL peut être couplée au guide de lumière GL soit directement, par exemple par collage ou par enchâssement dans un orifice défini dans sa face d'extrémité d'injection, soit indirectement, par exemple via la plaque de support. Par ailleurs, chaque diode électroluminescente ou diode laser SL peut être agencée de manière à émettre une lumière blanche ou bien une lumière colorée. D'autre part, en présence d'au moins deux diodes électroluminescentes ou diodes laser SL, ces dernières peuvent être agencées de manière à émettre des lumières de couleurs différentes ou bien identiques.  Each light-emitting diode or laser diode SL may be coupled to the light guide GL either directly, for example by gluing or by embedding in a hole defined in its injection end face, or indirectly, for example via the support plate. Furthermore, each light-emitting diode or laser diode SL may be arranged to emit white light or a colored light. On the other hand, in the presence of at least two light-emitting diodes or laser diodes SL, the latter can be arranged to emit different or identical light colors.
Chaque (le) guide de lumière GL s'étend suivant une ligne qui, dans l'exemple non limitatif illustré, est une droite parallèle à la direction transversale Y. Mais chaque guide de lumière GL pourrait s'étendre suivant une ligne curviligne présentant au moins une courbure. Lorsque la ligne présente plusieurs courbures (au moins deux), ces dernières peuvent être éventuellement dans des plans différents. On notera qu'en présence de plusieurs guides de lumière GL, ces derniers (GL) peuvent présenter des formes (et donc d'éventuelles courbures) différentes. Each (the) light guide GL extends along a line which, in the nonlimiting example illustrated, is a straight line parallel to the transverse direction Y. But each light guide GL could extend along a curvilinear line presenting the less a curvature. When the line has several curvatures (at least two), the latter may be possibly in different planes. Note that in the presence of several light guides GL, the latter (GL) may have different shapes (and therefore possible curvatures).
Par ailleurs, chaque guide de lumière GL peut être réalisé en matière plastique ou en verre.  Furthermore, each GL light guide can be made of plastic or glass.
Selon l'invention, la face avant FV du guide de lumière GL présente un premier profil de conique et la face arrière FR est métallisée et présente un second profil de conique associé à une ligne de foyer LF qui est située dans le cœur CG. Chaque profil de conique est obtenu par « extrusion » au sein d'une surface de conique dans une direction donnée.  According to the invention, the front face FV of the light guide GL has a first conical profile and the rear face FR is metallized and has a second conical profile associated with a focus line LF which is located in the core CG. Each conical profile is obtained by "extruding" within a conical surface in a given direction.
La face arrière FR étant définie par un déplacement d'une conique le long de la ligne suivant laquelle s'étend le guide de lumière GL, ce dernier ne présente donc pas un unique foyer mais une ligne de foyer LF. Dans l'exemple non limitatif illustré sur la figure 1 , la face arrière FR est définie par la translation d'une parabole le long de la direction transversale Y et donc le guide de lumière GL présente une ligne de foyer LF linéaire (parallèle à la direction transversale Y). Since the rear face FR is defined by a displacement of a conic along the line along which the light guide GL extends, the latter does not therefore have a single focus but a focus line LF. In the nonlimiting example illustrated in FIG. 1, the rear face FR is defined by the translation of a parabola along the transverse direction Y and therefore the light guide GL has a linear LF line of focus (parallel to the transverse direction Y).
On notera que dans l'exemple non limitatif illustré sur les figures 1 et 2 le premier profil est semi circulaire et le second profil est semi parabolique. Mais d'autres profils peuvent être envisagés dès lors qu'il s'agit de profils de coniques. Note that in the non-limiting example illustrated in Figures 1 and 2 the first profile is semi-circular and the second profile is semi-parabolic. But other profiles can be considered when it comes to conical profiles.
On notera également, comme illustré sur la figure 2, qu'un photon qui passe sensiblement par la ligne de foyer LF et qui se dirige vers la face arrière métallisée FR est réfléchi suivant une direction qui est sensiblement parallèle à une direction prédéfinie qui est définie ici par l'axe de la seconde conique (lorsque cette dernière est parabolique). Ce dernier axe est ici parallèle à la direction longitudinale X. It will also be noted, as illustrated in FIG. 2, that a photon which passes substantially through the focus line LF and which is directed towards the metallized rear face FR is reflected in a direction which is substantially parallel to a predefined direction which is defined here by the axis of the second conic (when the latter is parabolic). This last axis is here parallel to the longitudinal direction X.
Toujours selon l'invention, le cœur CG comprend, sur au moins une partie de la ligne de foyer LF, au moins un élément de diffusion ED qui est propre à renvoyer certains photons qui l'atteignent vers la face arrière FR afin que cette dernière (FR) les réfléchissent vers la face avant FV suivant des directions qui sont sensiblement parallèles à la direction prédéfinie (ici X), pour définir au moins un faisceau de lumière remplissant au moins partiellement une fonction photométrique et/ou assurant un effet de style lumineux. Still according to the invention, the core CG comprises, on at least part of the focus line LF, at least one diffusion element ED which is adapted to return certain photons which reach it towards the rear face FR so that the latter (FR) reflect them towards the front face FV following directions which are substantially parallel to the predefined direction (here X), to define at least one light beam at least partially filling a photometric function and / or providing a light style effect.
L'expression « remplir au moins partiellement » signifie ici que le dispositif D fournit au moins un faisceau qui va ensuite être traité (par exemple par un réflecteur ou un écran ou encore une lentille de son bloc optique) afin de réaliser une fonction photométrique, ou bien qui n'est pas traité et donc réalise une fonction photométrique.  The expression "fill at least partially" means here that the device D provides at least one beam which will then be treated (for example by a reflector or a screen or a lens of its optical block) in order to perform a photometric function, or else that is not processed and therefore performs a photometric function.
On notera que le parallélisme doit être ici compris comme une tendance générale.  It should be noted that parallelism must be understood here as a general tendency.
On notera également qu'un « élément de diffusion » est ici un élément défini dans la masse du cœur CG afin de dévier des photons qui l'atteignent dans n'importe quelle direction de l'espace. Une fois éclairé, l'élément de diffusion ED se comporte donc comme une source lumineuse secondaire, dont une partie du rayonnement atteindra la face arrière FR (métallisée). Lorsque cette face arrière FR est un cylindre parabolique et que la source lumineuse est sensiblement située sur la ligne de foyer LF de la parabole, les photons renvoyés par cette source lumineuse sont réfléchis par la face arrière FR selon une direction qui est sensiblement parallèle à l'axe de la parabole.  It will also be noted that a "diffusion element" is here a defined element in the mass of the heart CG in order to deflect photons that reach it in any direction of space. Once illuminated, the diffusion element ED therefore behaves as a secondary light source, part of the radiation of which will reach the rear face FR (metallized). When this rear face FR is a parabolic cylinder and the light source is substantially located on the focus line LF of the parabola, the photons reflected by this light source are reflected by the rear face FR in a direction which is substantially parallel to the light source. axis of the parable.
Lorsque le guide de lumière GL est observé frontalement (c'est-à-dire du côté de sa face avant FV), la ligne d'élément(s) de diffusion ED et la face arrière FR brillent. When the light guide GL is observed frontally (that is to say on the side of its front face FV), the ED element line (s) and the rear face FR shine.
De préférence, chaque élément de diffusion ED est réalisé sous la forme d'un nuage de points (ou centres) diffusants au moyen d'un faisceau laser qui est focalisé sensiblement sur la ligne de foyer LF afin de brûler ou déformer localement la matière constituant le cœur CG.  Preferably, each diffusion element ED is produced in the form of a cloud of scattering points (or centers) by means of a laser beam which is focused substantially on the focal line LF in order to locally burn or deform the material constituting the CG heart.
Par ailleurs, les éléments de diffusion ED peuvent présenter différentes formes globales dès lors qu'elles sont adaptées à la diffusion des photons, comme illustré sur la figure 2. La taille typique d'un point (ou centre) diffusant est de l'ordre du micron. La distribution spatiale des points diffusants constituant un élément de diffusion ED peut être de forme tronconique ou cylindrique. Dans l'exemple de la figure 1 , l'axe des cônes ou des cylindres est sensiblement aligné suivant la direction transversale Y. Par exemple, dans le cas d'une forme globale cylindrique circulaire, le diamètre de la section transverse (dans le plan XZ) d'un élément de diffusion ED peut être égal à environ 1 mm. Furthermore, the diffusion elements ED may have different global shapes as soon as they are adapted to the scattering of photons, as shown in FIG. 2. The typical size of a diffusing point (or center) is of the order micron. The spatial distribution of scattering points constituting an ED diffusion element may be of frustoconical or cylindrical shape. In the example of Figure 1, the axis of the cones or cylinders is substantially aligned in the transverse direction Y. For example, in the case of a circular cylindrical overall shape, the diameter of the cross section (in the plane XZ) of a diffusion element ED can be equal to about 1 mm.
D'autre part, les éléments de diffusion ED peuvent avoir une forme globale et/ou une densité et/ou une dispersion qui varie(nt) en fonction de leur éloignement par rapport à la source de lumière SL, selon les besoins, et notamment selon l'effet de style lumineux recherché.  On the other hand, the diffusion elements ED may have a global shape and / or a density and / or a dispersion which varies (nt) as a function of their distance from the light source SL, according to the needs, and in particular according to the desired light style effect.
Par exemple, les éléments de diffusion ED peuvent présenter une section transverse (dans le plan XZ) qui croît avec leur éloignement par rapport à la source de lumière SL, de manière à offrir en sortie de la face avant FV au moins un faisceau de lumière réfléchie d'intensité sensiblement constante, et donc homogène. On comprendra en effet, que plus l'on s'éloigne de la source de lumière SL, moins le nombre de photons est élevé, et donc plus la section transverse d'un élément de diffusion ED doit être grande pour augmenter la probabilité qu'il puisse être atteint par des photons.  For example, the diffusion elements ED may have a cross section (in the XZ plane) which increases with their distance from the light source SL, so as to provide at the output of the front face FV at least one light beam reflected of substantially constant intensity, and therefore homogeneous. It will be understood, in fact, that the further away the light source SL, the lower the number of photons is, and therefore the larger the cross section of a diffusion element ED must be to increase the probability that it can be reached by photons.
En variante ou en complément, la densité d'un élément de diffusion ED (c'est-à-dire le nombre de points diffusants de son nuage au mm2) peut croître avec l'éloignement de ce dernier (ED) par rapport à la source de lumière SL. Cela permet également d'offrir en sortie de la face avant FV au moins un faisceau de lumière réfléchie dont la luminance est sensiblement constante, et donc l'aspect allumé homogène. On comprendra en effet, que plus l'on s'éloigne de la source de lumière SL, moins le nombre de photons est élevé, et donc plus la densité d'un élément de diffusion ED doit être grande pour augmenter la probabilité qu'il puisse être atteint par des photons, à volume constant. As a variant or in addition, the density of a diffusion element ED (that is to say the number of scattering points of its cloud per mm 2 ) can increase with the distance of the latter (ED) from the light source SL. This also makes it possible to provide at the output of the front face FV at least one reflected light beam whose luminance is substantially constant, and therefore the appearance lit homogeneous. It will be understood, in fact, that the further away the light source SL, the lower the number of photons is, and therefore the greater the density of a diffusion element ED must be large to increase the probability that it can be reached by photons at constant volume.
Egalement en variante ou en complément, la dispersion (ou la distance entre) des éléments de diffusion ED peut décroître avec l'éloignement de ces derniers (ED) par rapport à la source de lumière SL. Cela permet également d'offrir en sortie de la face avant FV au moins un faisceau de lumière réfléchie dont la luminance est sensiblement constante, et donc l'aspect allumé homogène. On comprendra en effet, que plus l'on s'éloigne de la source de lumière SL, moins le nombre de photons est élevé, et donc plus la dispersion des éléments de diffusion ED doit être petite pour augmenter la probabilité qu'ils puissent être atteint par des photons, à volume constant. Also alternatively or in addition, the dispersion (or the distance between) of the diffusion elements ED may decrease with the distance of the latter (ED) relative to the light source SL. This also makes it possible to offer at the output of the front face FV at least one reflected light beam whose luminance is substantially constant, and therefore the aspect lit homogeneous. It will be understood that the further away from the light source SL, the lower the number of photons, and therefore the smaller the dispersion of the scattering elements ED must be to increase the probability that they may be reached by photons, at constant volume.
En jouant sur la forme globale et/ou la densité et/ou la dispersion et/ou les zones de définition des éléments de diffusion ED sur toute l'étendue de la ligne de foyer LF, on peut délivrer en sortie du dispositif D un ou plusieurs faisceaux de lumière qui remplissent au moins partiellement de nombreuses fonctions photométriques différentes et/ou assurent de très nombreux effets de style lumineux différents, et notamment des effets de profondeur et/ou des effets de volume (ou 3D) et/ou des effets de gradient de luminosité.  By modifying the overall shape and / or the density and / or the dispersion and / or the definition zones of the diffusion elements ED over the whole extent of the focus line LF, it is possible to output one or a plurality of light beams which at least partially fulfill many different photometric functions and / or provide a very large number of different light style effects, including depth effects and / or volume (or 3D) effects and / or brightness gradient.
On entend ici par « effet de volume (ou 3D) » un effet volumique donnant à un observateur une impression de masse et/ou d'épaisseur et/ou de caractère charnu lorsque le dispositif D fonctionne.  Here, the term "volume effect (or 3D)" means a volume effect giving an observer an impression of mass and / or thickness and / or fleshiness when the device D operates.
On notera que pour augmenter encore plus le nombre d'effets de style lumineux différents, on peut également définir sur la face avant FV et/ou dans le cœur CG (par exemple sous la forme d'ensembles de points) des lignes, éventuellement en relief (rainures ou nervures ou motifs tridimensionnels (3D), éventuellement réfléchissants)).  Note that to further increase the number of different luminous style effects, it is also possible to define on the front face FV and / or in the heart CG (for example in the form of sets of points) lines, possibly in relief (grooves or ribs or three-dimensional patterns (3D), possibly reflecting).
L'invention offre plusieurs avantages, parmi lesquels : The invention offers several advantages, among which:
- une très grande variété d'effets de style lumineux (effets 3D, effet de profondeur, contrôle de la densité lumineuse de la fonction photométrique, contrôle de l'homogénéité), - a very large variety of luminous style effects (3D effects, depth effect, control of the luminous density of the photometric function, control of the homogeneity),
- une réduction du nombre de composants du fait de l'absence de réflecteur, de miroir ou de dioptre additionnel, et donc une réduction du coût de fabrication, a reduction in the number of components due to the absence of reflector, mirror or additional diopter, and therefore a reduction in the manufacturing cost,
- l'utilisation de sources de lumière fortement collimatées, comme par exemple des diodes laser, the use of highly collimated light sources, for example laser diodes,
- un contrôle précis de la diffusion du faisceau lumineux lors de la définition des distributions lumineuses nécessaires à la signalisation, une augmentation du rendement global de la fonction photométrique choisie, du fait de la précision de la définition des éléments de diffusion, notamment avec un faisceau laser. - precise control of the diffusion of the light beam during the definition the light distributions required for the signaling, an increase in the overall efficiency of the selected photometric function, because of the precision of the definition of the diffusion elements, in particular with a laser beam.

Claims

REVENDICATIONS
1 . Dispositif d'éclairage (D) comprenant au moins un guide de lumière (GL) s'étendant suivant une ligne et comportant deux extrémités (E1 , E2) opposées, dont l'une au moins est couplée à une source de lumière (SL) générant des photons, et un cœur (CG) délimité par des faces avant (FV) et arrière (FR), caractérisé en ce que ladite face avant (FV) présente un premier profil de conique et ladite face arrière (FR) est métallisée et présente un second profil de conique associé à une ligne de foyer (LF) située dans ledit cœur (CG), et en ce que ledit cœur (CG) comprend sur au moins une partie de ladite ligne de foyer (LF) au moins un élément de diffusion (ED) propre à renvoyer certains photons qui l'atteignent vers ladite face arrière (FR) afin que cette dernière (FR) les réfléchissent vers ladite face avant (FV) suivant des directions sensiblement parallèles à une direction prédéfinie pour définir au moins un faisceau de lumière remplissant au moins partiellement une fonction photométrique et/ou assurant un effet de style lumineux. 1. Lighting device (D) comprising at least one light guide (GL) extending in a line and having two opposite ends (E1, E2), at least one of which is coupled to a light source (SL) generating photons, and a core (CG) delimited by front (FV) and rear (FR) faces, characterized in that said front face (FV) has a first conical profile and said rear face (FR) is metallized and has a second conical profile associated with a focus line (LF) located in said heart (CG), and in that said heart (CG) comprises on at least a portion of said focus line (LF) at least one element diffusion (ED) capable of returning certain photons which reach it towards said rear face (FR) so that the latter (FR) reflects them towards said front face (FV) in directions substantially parallel to a predefined direction to define at least a beam of light filling at least a photometric function and / or ensuring a luminous style effect.
2. Dispositif selon la revendication 1 , caractérisé en ce que chaque élément de diffusion (ED) est défini dans ledit cœur (CG) sous la forme d'un nuage de points diffusants par un faisceau laser.  2. Device according to claim 1, characterized in that each diffusion element (ED) is defined in said core (CG) in the form of a cloud of scattering points by a laser beam.
3. Dispositif selon l'une des revendications 1 et 2, caractérisé en ce que chaque élément de diffusion (ED) présente une forme globale choisie dans un groupe comprenant au moins une forme tronconique et une forme cylindrique.  3. Device according to one of claims 1 and 2, characterized in that each diffusion element (ED) has a global shape selected from a group comprising at least one frustoconical shape and a cylindrical shape.
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que lesdits éléments de diffusion (ED) ont une forme globale et/ou une densité et/ou une dispersion variable(s) en fonction de leur éloignement par rapport à ladite source de lumière (SL).  4. Device according to one of claims 1 to 3, characterized in that said diffusion elements (ED) have a global shape and / or density and / or variable dispersion (s) depending on their distance from said light source (SL).
5. Dispositif selon la revendication 4, caractérisé en ce que lesdits éléments de diffusion (ED) présentent une section transverse qui croît avec leur éloignement par rapport à ladite source de lumière (SL).  5. Device according to claim 4, characterized in that said diffusion elements (ED) have a cross section which increases with their distance from said light source (SL).
6. Dispositif selon l'une des revendications 4 et 5, caractérisé en ce que ladite densité d'un élément de diffusion (ED) croît avec son éloignement par rapport à ladite source de lumière (SL). 6. Device according to one of claims 4 and 5, characterized in that said density of a diffusion element (ED) increases with its distance with respect to said light source (SL).
7. Dispositif selon l'une des revendications 4 à 6, caractérisé en ce que ladite dispersion des éléments de diffusion (ED) décroît avec leur éloignement par rapport à ladite source de lumière (SL).  7. Device according to one of claims 4 to 6, characterized in that said dispersion of the diffusion elements (ED) decreases with their distance from said light source (SL).
8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que ledit premier profil est semi circulaire.  8. Device according to one of claims 1 to 7, characterized in that said first profile is semicircular.
9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que ledit second profil est semi parabolique.  9. Device according to one of claims 1 to 8, characterized in that said second profile is semi parabolic.
10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce qu'il comprend au moins deux guides de lumière (GL) couplés respectivement à au moins deux sources de lumière (SL).  10. Device according to one of claims 1 to 9, characterized in that it comprises at least two light guides (GL) respectively coupled to at least two light sources (SL).
1 1 . Dispositif selon l'une des revendications 1 à 10, caractérisé en ce que l'extrémité (E2) qui est opposée à ladite source de lumière (SL) est métallisée afin de réfléchir vers le cœur (CG) les photons qui l'atteignent.  1 1. Device according to one of claims 1 to 10, characterized in that the end (E2) which is opposite to said light source (SL) is metallized in order to reflect towards the heart (CG) the photons that reach it.
12. Dispositif selon l'une des revendications 1 à 10, caractérisé en ce que lesdites deux extrémités (E1 , E2) sont respectivement couplées à deux sources de lumière (SL).  12. Device according to one of claims 1 to 10, characterized in that said two ends (E1, E2) are respectively coupled to two light sources (SL).
13. Bloc optique, caractérisé en ce qu'il comprend au moins un dispositif d'éclairage (D) selon l'une des revendications précédentes.  13. Optical block, characterized in that it comprises at least one lighting device (D) according to one of the preceding claims.
14. Véhicule, caractérisé en ce qu'il comprend au moins un bloc optique selon la revendication 13.  Vehicle, characterized in that it comprises at least one optical unit according to claim 13.
EP13747471.4A 2012-08-01 2013-07-22 Light guide(s) lighting device on which the rear face has a conical profile and which has diffusion elements defined along a focal line Withdrawn EP2880359A1 (en)

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FR1257467A FR2994247B1 (en) 2012-08-01 2012-08-01 LIGHTING DEVICE WITH REAR-SIDE GUIDED LIGHT GUIDE (S) WITH DEFINED DIFFUSION ELEMENTS ON A HOME LINE
PCT/FR2013/051756 WO2014020260A1 (en) 2012-08-01 2013-07-22 Light guide(s) lighting device on which the rear face has a conical profile and which has diffusion elements defined along a focal line

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FR2994247B1 (en) 2014-08-22
FR2994247A1 (en) 2014-02-07
CN104813100A (en) 2015-07-29
WO2014020260A1 (en) 2014-02-06
CN104813100B (en) 2017-11-28

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