WO2024042284A1 - Double light guide involving end optical coupling - Google Patents

Double light guide involving end optical coupling Download PDF

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Publication number
WO2024042284A1
WO2024042284A1 PCT/FR2023/051142 FR2023051142W WO2024042284A1 WO 2024042284 A1 WO2024042284 A1 WO 2024042284A1 FR 2023051142 W FR2023051142 W FR 2023051142W WO 2024042284 A1 WO2024042284 A1 WO 2024042284A1
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WO
WIPO (PCT)
Prior art keywords
light guide
cylindrical light
lighting system
cylindrical
optical coupling
Prior art date
Application number
PCT/FR2023/051142
Other languages
French (fr)
Inventor
Filipe Videira
Original Assignee
Stellantis Auto Sas
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Filing date
Publication date
Application filed by Stellantis Auto Sas filed Critical Stellantis Auto Sas
Publication of WO2024042284A1 publication Critical patent/WO2024042284A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • 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
    • F21S43/247—Light guides with a single light source being coupled into the light guide
    • 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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • 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
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • 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
    • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/55—Daytime running lights [DRL]

Definitions

  • the present invention claims priority from French application 2208481 filed on 08/24/2022, the content of which (text, drawings and claims) is here incorporated by reference.
  • the present invention relates to headlights or lights which are fitted to vehicles, for example of the automobile type, to provide a lighting and/or visual signaling function.
  • Vehicles are equipped with lighting systems which are dedicated to the visual signaling of the vehicle such as, for example, front or rear lights or daytime running lights also called daytime running lights, (“Daytime running lamp” or “ daytime running light”, in English).
  • lighting systems which are dedicated to the visual signaling of the vehicle such as, for example, front or rear lights or daytime running lights also called daytime running lights, (“Daytime running lamp” or “ daytime running light”, in English).
  • Figure 1 schematically illustrates a light guide.
  • the light guide is usually in the form of a cylindrical tube A comprising two ends. At one of these ends, a source of photons B is positioned. This photon source B is intended to produce photons which propagate along the cylindrical tube A to light return means C positioned on one of the sides of the cylindrical tube A either over its entire length or only partially. These light return means C are very often prisms which have the function of modifying the trajectories of the photos which are then redirected towards a desired direction typically transverse to the axis of the light guide A. It is known to use style masks which define the visual appearance of a luminous object.
  • a style mask is opaque except in certain parts of it, called windows, through which beams of light from photons propagating along a cylindrical light guide positioned behind the style mask emerge.
  • windows through which beams of light from photons propagating along a cylindrical light guide positioned behind the style mask emerge.
  • the desired style mask is to obtain windows whose dimension is, for example, twice as large as the diameter of the cylindrical light guide, one can consider using a light guide of larger diameter. But the dimensions of the windows may not be constant and it is then financially costly to use light guides of large diameter to illuminate only a few windows whose dimension would be equal to the diameter of this light guide.
  • Another alternative is to use a first light guide of small diameter to illuminate certain windows of the style mask and to superimpose a second light guide (or more) of small diameter to illuminate windows whose dimension would be larger. important.
  • the superposition of two or even more light guides limits the possibilities of the style mask while it is desired to give maximum freedom to create these style masks.
  • the problem is to define a lighting system which leaves maximum freedom for the creation of style masks.
  • One of the objects of the present invention is to solve at least one of the problems or deficiencies of the technological background described above.
  • Another object of the present invention is to obtain a lighting system intended to equip a vehicle which produces homogeneous lighting while using a limited number of light guides.
  • Another object of the present invention is to obtain a lighting system which allows great freedom of window design of a style mask.
  • the present invention consists of creating a coupling between light guides two by two at one of their ends by an optical coupling means intended to redirect the photons arriving at the end of a first light guide towards the end of a second light guide so as to be able to illuminate windows of different dimensions of a style mask.
  • the present invention is particularly advantageous because it allows much more varied mask styles than those currently found. Indeed, thanks to the optical coupling means, two light guides can be coupled at variable angles which is not possible to achieve using a single light guide, because of the limitations of its radius of curvature, or by superposition of light guides.
  • the present invention is also advantageous because it uses only a single source of photons and not one source of photons per light guide.
  • the present invention relates to a lighting system intended to equip a vehicle, comprising
  • first cylindrical light guide comprising a first end intended to be illuminated by the photon source
  • a second cylindrical light guide comprising a first end coupled to a second end of the first light guide by optical coupling means intended to redirect the photons arriving at the second end of the first cylindrical light guide towards the first end of the second guide cylindrical light;
  • an opaque mask comprising windows through which parts of the first and/or second cylindrical light guide are visible;
  • a light return means being positioned at each part of the first and/or second cylindrical light guide corresponding to a window of the style mask so that photons propagating along the first and/or second cylindrical light guides are redirected towards said window.
  • the optical coupling means and the first end of the second cylindrical light guide are masked.
  • At least one of said windows is provided with optics or billages.
  • a second end of the second cylindrical light guide is obstructed.
  • the first and second cylindrical light guides are superimposed longitudinally on each other at least on one of their parts; the optical coupling means is adapted to redirect the photons at an angle of 180 degrees; at least one of said windows, called the first window, has one of its dimensions which is less than a sum of the diameters of the first and second cylindrical light guides; and at least one of said windows, called the second window, has one of its dimensions which is at least equal to the sum of the diameters of the first and second cylindrical light guides.
  • the optical coupling means comprises a prism comprising two light return faces inclined at 45 degrees.
  • the second end of the second cylindrical light guide is mechanically connected to the first light guide.
  • the optical coupling means comprises a light return face inclined at an angle less than or equal to 90 degrees.
  • the lighting system further comprises a third light guide comprising a first end coupled to the second end of the second light guide by another optical coupling means.
  • the present invention relates to a vehicle, for example of the automobile type or of the land motor vehicle type, comprising at least one lighting system according to the first aspect of the present invention.
  • FIG. 1 schematically illustrates a light guide.
  • FIG. 2 schematically illustrates a lighting system according to an exemplary embodiment of the present invention
  • FIG. 3 schematically illustrates a coupling of two light guides according to an exemplary embodiment of the present invention
  • FIG. 4 schematically illustrates a light return means along a light guide according to an exemplary embodiment of the present invention
  • FIG. 5 schematically illustrates an optical coupling means between two light guides according to an exemplary embodiment of the present invention
  • FIG. 6 schematically illustrates optical coupling constraints between two light guides according to an exemplary embodiment of the present invention
  • FIG. 7 schematically illustrates according to a variant of coupling of two light guides an exemplary embodiment of the present invention
  • FIG. 8 schematically illustrates according to a variant of coupling of two light guides an exemplary embodiment of the present invention
  • FIG. 9 schematically illustrates a variant of coupling of two light guides, an exemplary embodiment of the present invention.
  • FIGS 2-9 schematically illustrate a lighting system according to a particular non-limiting embodiment and various alternative embodiments.
  • the lighting system is intended to equip a motor vehicle, but the present invention is not limited to this application.
  • the lighting system can in fact equip any vehicle, automobile type or motorized land vehicle type (bus, coach, truck, etc.), which must provide at least one photometric lighting and/or signaling function.
  • the lighting system comprises two or even three light guides but the present invention is not limited to these numbers of light guides.
  • the present invention extends to any lighting system which would include more than three light guides coupled in pairs as well as to coupling means which redirect photons at any angle.
  • FIGS. 2-9 illustrate different aspects of the lighting system, different embodiments implementing some of these aspects being described below with reference to the figures.
  • Figure 2 schematically illustrates a lighting system 1 according to an exemplary embodiment of the present invention.
  • the System 1 includes a mask of style 2.
  • the mask of style 2 is opaque and formed, for example, of plastic material.
  • Mask 2 is opaque except in certain of its parts 16 and 17, called windows, through which parts of light guides are visible, that is to say that beams of light come out of these windows. These beams of light come from photons propagating along these light guides positioned behind the style 2 mask.
  • At least one of the windows of the style 2 mask is provided with a translucent material, preferably having optics/billings per example in opaline material, with the aim of blurring the or each cylindrical light guide visible through said at least one window.
  • the lighting system 1 comprises a photon source 11, a first cylindrical light guide 12, a second cylindrical light guide 13 and a first optical coupling means 14.
  • the first cylindrical light guide 12 comprises a first end intended to be illuminated by the photon source 11.
  • the second cylindrical light guide 13 comprises a first end coupled to a second end of the first cylindrical light guide 12 by optical coupling means 14 intended to redirect the photons arriving at the second end of the first cylindrical light guide 12 towards the first end of the second cylindrical light guide 13.
  • the optical coupling means 14 and the first end of the second cylindrical light guide 13 are masked to obtain homogeneous lighting.
  • the second end of the second cylindrical light guide 13 is obstructed.
  • the lighting system 1 also comprises a light return means 18 (FIG. 4) positioned at each part of the first 12 and/or the second 13 cylindrical light guides corresponding to a window of the style mask 2 so that photons propagating along the first or second cylindrical light guides are redirected towards said window in a desired direction.
  • a light return means 18 FIG. 4
  • the optical light return means 18 transversely redirects the photons propagating longitudinally along a light guide.
  • Figure 3 schematically illustrates a coupling of two light guides according to an exemplary embodiment of the present invention.
  • the first 12 and second 13 of cylindrical light are superimposed longitudinally one on the other at least on one of their parts.
  • the optical coupling means 14 is adapted to redirect the photons arriving at the end of the first cylindrical light guide 12 at an angle of 180 degrees so that they propagate along the second cylindrical light guide 13.
  • At least one of the windows of the style model 2, called first window 16 has one of its dimensions which is less than the sum of the diameters of the first 12 and 13 second guides of cylindrical light guides and at least one of said windows, called second window 17, has a dimension which is at least equal to the sum of the diameters of the first 12 and second 13 cylindrical light guides.
  • the style mask 2 comprises three first windows 16 making visible three parts of the first cylindrical light guide 12 making visible parts of the first light guide 12, and a second window 17 making visible a part of the first cylindrical light guide 12 and part of the second cylindrical light guide 13.
  • the optical coupling means 14 comprises a prism comprising two light reflecting faces inclined at 45 degrees.
  • the first 12 and the second 13 light guides comprise a light return means 18 corresponding to each window 16 and 17 of the style mask 12. Due to the opposite direction of the photons between the 2 visible parts of the light guides, the means light return 18 positioned along the first light guide 12 and those positioned along the second light guide 13 have opposite angles so that the resulting beam of photons follows the same desired direction.
  • Figure 6 schematically illustrates the coupling constraints between the two cylindrical light guides 12 and 13 according to the optical coupling of Figure 3.
  • the curve of the first cylindrical light guide 12 has a positive angle (in the anti-clockwise direction) by relation to the desired lighting direction D.
  • Another of these constraints is that the angle formed by the longitudinal axes of the first and second cylindrical light guides is positive (in the counterclockwise direction) with respect to the desired lighting direction D, to have good optical efficiency.
  • Figure 7 schematically illustrates according to a variant of coupling the two cylindrical light guides 12 and 13 coupled according to the optical coupling of Figure 3.
  • the second end of the second cylindrical light guide 13 is mechanically connected to the first light guide 12, for example by means of a rib 21.
  • the optical coupling means 14 comprises a light return face inclined at an angle less than or equal to 90 degrees.
  • Figure 9 schematically illustrates a variant of coupling of three light guides, an exemplary embodiment of the present invention.
  • the second end of the first cylindrical light guide 12 is coupled to the first end of the second cylindrical light guide 13 by the coupling means 14 provided to redirect the photons at an angle less than 90 degrees.
  • the second end of the second cylindrical light guide 3 is coupled to a first end of a third light guide 19 by a second optical coupling means 20 provided to redirect the photons at an angle of 90 degrees.
  • the principle of optical coupling between two light guides by means of optical coupling can extend to more than three light guides.
  • each source of photons can, for example, comprise at least one light-emitting diode or at least one laser diode or even at least one light bulb.
  • said at least one photon source is carried by an electronic card.
  • the configuration of the photon source(s) in terms of number, positioning, arrangement, type, etc. can be adapted by those skilled in the art as appropriate.
  • the electronic card comprises electronic means configured to control the operation of each photon source.
  • This card can for example be a printed circuit board of the PCB type (for “Printed Circuit Board” in English).
  • the electronic card is carried by a plane, that is to say that all the photon sources are carried by this plane.
  • a person skilled in the art will understand that the exemplary embodiments and variants described above constitute only non-limiting examples of implementation of the invention. In particular, those skilled in the art may consider any adaptation or combination of the exemplary embodiments and variants described above, in order to meet a very specific need.
  • the present invention is therefore not limited to the exemplary embodiments described above but extends in particular to a lighting system which would include secondary characteristics without thereby departing from the scope of the present invention.
  • the present invention also relates to a vehicle, for example an automobile or more generally a land motor vehicle, comprising at least one lighting system as described above.

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

Abstract

The present invention relates to a system comprising two light guides (12, 13) that are coupled by an optical coupling means (14) intended to redirect photons arriving from a first cylindrical light guide (12) to a second cylindrical light guide (13); an opaque mask comprising windows (16, 17) through which parts of the first and/or second cylindrical light guide are visible; and a light return means positioned at each part of a cylindrical light guide (12, 13) that corresponds to a window in the mask.

Description

DESCRIPTION DESCRIPTION
Titre : Guide de lumière double par couplage optique en extrémité Title: Double light guide by optical end coupling
Domaine technique Technical area
La présente invention revendique la priorité de la demande française 2208481 déposée le 24.08.2022 dont le contenu (texte, dessins et revendications) est ici incorporé par référence. La présente invention concerne les projecteurs ou les feux qui équipent des véhicules, par exemple de type automobile, pour assurer une fonction d’éclairage et/ou de signalisation visuelle. The present invention claims priority from French application 2208481 filed on 08/24/2022, the content of which (text, drawings and claims) is here incorporated by reference. The present invention relates to headlights or lights which are fitted to vehicles, for example of the automobile type, to provide a lighting and/or visual signaling function.
Arrière-plan technologique Technology background
Les véhicules sont équipés de systèmes d’éclairage qui sont dédiés à la signalisation visuelle du véhicule tels que, par exemple, des feux avant ou arrière ou encore des feux de circulation diurnes aussi appelés feux de jour, (« Daytime running lamp » ou « daytime running light », en anglais). Vehicles are equipped with lighting systems which are dedicated to the visual signaling of the vehicle such as, for example, front or rear lights or daytime running lights also called daytime running lights, (“Daytime running lamp” or “ daytime running light”, in English).
Dans ce type de systèmes d’éclairage, il est courant d’utiliser des systèmes optiques de type « guide de lumière ». In this type of lighting systems, it is common to use “light guide” type optical systems.
La figure 1 illustre schématiquement un guide de lumière. Figure 1 schematically illustrates a light guide.
Le guide de lumière se présente habituellement comme un tube cylindrique A comprenant deux extrémités. A l’une de ces extrémités, une source de photons B est positionnée. Cette source de photons B est destinée à produire des photons qui se propagent le long du tube cylindrique A jusqu’à des moyens de renvoi lumineux C positionnés sur l’un des côtés du tube cylindrique A soit sur toute sa longueur soit seulement partiellement. Ces moyens de renvoi lumineux C sont très souvent des prismes qui ont pour fonction de modifier les trajectoires des photos qui sont alors redirigés vers une direction souhaitée typiquement transversalement à l’axe du guide de lumière A. Il est connu d’utiliser des masques de style qui définissent l’aspect visuel d’un objet lumineux. Habituellement, un masque de style est opaque excepté dans certaines de ses parties, appelées fenêtres, à travers desquelles sortent des faisceaux de lumière issus de photons se propageant le long d’un guide de lumière cylindrique positionné derrière le masque de style. Si le masque de style souhaité est d’obtenir des fenêtres dont une dimension est, par exemple, deux fois plus importantes que le diamètre du guide de lumière cylindrique, on peut envisager d’utiliser un guide de lumière de diamètre plus important. Mais les dimensions des fenêtres peuvent ne pas être constantes et il est alors coûteux financièrement parlant d’utiliser des guides de lumière de diamètre important pour n’éclairer que peu de fenêtre dont une dimension serait égale au diamètre de ce guide de lumière. The light guide is usually in the form of a cylindrical tube A comprising two ends. At one of these ends, a source of photons B is positioned. This photon source B is intended to produce photons which propagate along the cylindrical tube A to light return means C positioned on one of the sides of the cylindrical tube A either over its entire length or only partially. These light return means C are very often prisms which have the function of modifying the trajectories of the photos which are then redirected towards a desired direction typically transverse to the axis of the light guide A. It is known to use style masks which define the visual appearance of a luminous object. Usually, a style mask is opaque except in certain parts of it, called windows, through which beams of light from photons propagating along a cylindrical light guide positioned behind the style mask emerge. If the desired style mask is to obtain windows whose dimension is, for example, twice as large as the diameter of the cylindrical light guide, one can consider using a light guide of larger diameter. But the dimensions of the windows may not be constant and it is then financially costly to use light guides of large diameter to illuminate only a few windows whose dimension would be equal to the diameter of this light guide.
Une autre alternative, est d’utiliser un premier guide de lumière de diamètre peu important pour éclairer certaines fenêtres du masque de style et de superposer un deuxième guide de lumière (ou plus) de diamètre peu important pour éclairer des fenêtres dont une dimension serait plus importante. Another alternative is to use a first light guide of small diameter to illuminate certain windows of the style mask and to superimpose a second light guide (or more) of small diameter to illuminate windows whose dimension would be larger. important.
La superposition de deux, voire plusieurs guides de lumière limite les possibilités du masque de style alors qu’il est souhaité de donner un maximum de liberté pour créer ces masques de style. The superposition of two or even more light guides limits the possibilities of the style mask while it is desired to give maximum freedom to create these style masks.
Le problème est de définir un système d’éclairage qui laisse un maximum de liberté pour la création de masque de style. The problem is to define a lighting system which leaves maximum freedom for the creation of style masks.
Résumé de la présente invention Summary of the present invention
L’un des objets de la présente invention est de résoudre au moins l’un des problèmes ou déficiences de l’arrière-plan technologique décrit précédemment. One of the objects of the present invention is to solve at least one of the problems or deficiencies of the technological background described above.
Un autre objet de la présente invention est d’obtenir un système d’éclairage destiné à équiper un véhicule qui produise un éclairage homogène tout en utilisant un nombre limité de guides de lumière. Another object of the present invention is to obtain a lighting system intended to equip a vehicle which produces homogeneous lighting while using a limited number of light guides.
Un autre objet de la présente invention est d’obtenir un système d’éclairage qui permette une grande liberté de conception de fenêtres d’un masque de style. Le présente invention consiste à créer un couplage entre eux des guides de lumière deux à deux en l’une de leurs extrémités par un moyen de couplage optique destiné à rediriger les photons arrivant à l’extrémité d’un premier guide de lumière vers l’extrémité d’un deuxième guide de lumière de manière à pouvoir éclairer des fenêtres de différentes dimensions d’un masque de style. Another object of the present invention is to obtain a lighting system which allows great freedom of window design of a style mask. The present invention consists of creating a coupling between light guides two by two at one of their ends by an optical coupling means intended to redirect the photons arriving at the end of a first light guide towards the end of a second light guide so as to be able to illuminate windows of different dimensions of a style mask.
La présente invention est particulièrement avantageuse car elle permet des styles de masque bien plus variés que ceux que l’on trouve actuellement. En effet, grâce au moyen de couplage optique, deux guides de lumière peuvent être couplés selon des angles variables ce qui n’est pas possible de réaliser en utilisant un seul guide de lumière, à cause des limitations de son rayon de courbure, ou par superposition de guides de lumière. The present invention is particularly advantageous because it allows much more varied mask styles than those currently found. Indeed, thanks to the optical coupling means, two light guides can be coupled at variable angles which is not possible to achieve using a single light guide, because of the limitations of its radius of curvature, or by superposition of light guides.
La présente invention est aussi avantageuse car elle n’utilise qu’une seule source de photons et non une source de photons par guide de lumière. The present invention is also advantageous because it uses only a single source of photons and not one source of photons per light guide.
De plus, le coût de fabrication par injection de plastique est réduite car une seule injection est nécessaire pour réaliser les différents guides couplés. In addition, the cost of manufacturing by plastic injection is reduced because only one injection is necessary to produce the different coupled guides.
Selon un premier aspect, la présente invention concerne un système d’éclairage destiné à équiper un véhicule, comprenant According to a first aspect, the present invention relates to a lighting system intended to equip a vehicle, comprising
- une source de photons ; - a source of photons;
- un premier guide de lumière cylindrique comprenant une première extrémité destinée à être éclairée par la source de photons ; - a first cylindrical light guide comprising a first end intended to be illuminated by the photon source;
- un deuxième guide de lumière cylindrique comprenant une première extrémité couplée à une deuxième extrémité du premier guide de lumière par un moyen de couplage optique destiné à rediriger les photons arrivant à la deuxième extrémité du premier guide de lumière cylindrique vers la première extrémité du deuxième guide de lumière cylindrique ; - a second cylindrical light guide comprising a first end coupled to a second end of the first light guide by optical coupling means intended to redirect the photons arriving at the second end of the first cylindrical light guide towards the first end of the second guide cylindrical light;
- un masque opaque comprenant des fenêtres au travers desquelles des parties du premier et/ou du deuxième guide de lumière cylindriques sont visibles ; - an opaque mask comprising windows through which parts of the first and/or second cylindrical light guide are visible;
- un moyen de renvoi lumineux étant positionné au niveau de chaque partie du premier et/ou du deuxième guide de lumière cylindrique correspondante à une fenêtre du masque de style pour que des photons se propageant le long du premier et/ou du deuxième guides de lumière cylindriques soient redirigés vers ladite fenêtre. - a light return means being positioned at each part of the first and/or second cylindrical light guide corresponding to a window of the style mask so that photons propagating along the first and/or second cylindrical light guides are redirected towards said window.
Selon une variante, le moyen de couplage optique et la première extrémité du deuxième guide de lumière cylindrique sont masqués. According to a variant, the optical coupling means and the first end of the second cylindrical light guide are masked.
Selon une variante, au moins l’une desdites fenêtres est munie d’optique ou billages.According to one variant, at least one of said windows is provided with optics or billages.
Selon une variante, une deuxième extrémité du deuxième guide de lumière cylindrique est obstruée. According to a variant, a second end of the second cylindrical light guide is obstructed.
Selon un exemple de réalisation, le premier et deuxième guides de lumière cylindriques sont superposés longitudinalement l’un sur l’autre au moins sur l’une de leurs parties ; le moyen de couplage optique est adapté pour rediriger les photons selon un angle de 180 degrés ; au moins l’une desdites fenêtres, appelée première fenêtre, a une de ses dimensions qui est inférieure à une somme des diamètres du premier et deuxième guides de lumière cylindriques ; et au moins l’une desdites fenêtres, appelée deuxième fenêtre, a une de ses dimensions qui est au moins égale à la somme des diamètres des premier et deuxième guides de lumière cylindriques. According to an exemplary embodiment, the first and second cylindrical light guides are superimposed longitudinally on each other at least on one of their parts; the optical coupling means is adapted to redirect the photons at an angle of 180 degrees; at least one of said windows, called the first window, has one of its dimensions which is less than a sum of the diameters of the first and second cylindrical light guides; and at least one of said windows, called the second window, has one of its dimensions which is at least equal to the sum of the diameters of the first and second cylindrical light guides.
Selon une variante de cet exemple de réalisation, le moyen de couplage optique comprend un prisme comprenant deux faces à renvoi lumineux inclinées à 45 degrés.According to a variant of this exemplary embodiment, the optical coupling means comprises a prism comprising two light return faces inclined at 45 degrees.
Selon une variante de cet exemple de réalisation, la deuxième extrémité du deuxième guide de lumière cylindrique est reliée mécaniquement au premier guide de lumière.According to a variant of this exemplary embodiment, the second end of the second cylindrical light guide is mechanically connected to the first light guide.
Selon un exemple de réalisation, le moyen de couplage optique comprend une face à renvoi lumineux inclinée selon un angle inférieur ou égal à 90 degrés. According to an exemplary embodiment, the optical coupling means comprises a light return face inclined at an angle less than or equal to 90 degrees.
Selon une variante, le système d’éclairage comporte en outre un troisième guide de lumière comprenant une première extrémité couplée à la deuxième extrémité du deuxième guide de lumière par un autre moyen de couplage optique. According to a variant, the lighting system further comprises a third light guide comprising a first end coupled to the second end of the second light guide by another optical coupling means.
Selon un deuxième aspect, la présente invention concerne un véhicule, par exemple de type automobile ou de type véhicule à moteur terrestre, comprenant au moins un système d’éclairage selon le premier aspect de la présente invention. Brève description des figures According to a second aspect, the present invention relates to a vehicle, for example of the automobile type or of the land motor vehicle type, comprising at least one lighting system according to the first aspect of the present invention. Brief description of the figures
D’autres caractéristiques et avantages de la présente invention ressortiront de la description des exemples de réalisation particuliers et non limitatifs de la présente invention ci-après, en référence aux figures 1 à 9 annexées, sur lesquelles : Other characteristics and advantages of the present invention will emerge from the description of the particular and non-limiting examples of embodiment of the present invention below, with reference to the attached Figures 1 to 9, in which:
[Fig. 1] illustre schématiquement un guide de lumière. [Fig. 1] schematically illustrates a light guide.
[Fig. 2] illustre schématiquement un système d’éclairage selon un exemple de réalisation de la présente invention ; [Fig. 2] schematically illustrates a lighting system according to an exemplary embodiment of the present invention;
[Fig. 3] illustre schématiquement un couplage de deux guides de lumière selon un exemple de réalisation de la présente invention ; [Fig. 3] schematically illustrates a coupling of two light guides according to an exemplary embodiment of the present invention;
[Fig. 4] illustre schématiquement un moyen de renvoi lumineux le long d’un guide de lumière selon un exemple de réalisation de la présente invention ; [Fig. 4] schematically illustrates a light return means along a light guide according to an exemplary embodiment of the present invention;
[Fig. 5] illustre schématiquement un moyen de couplage optique entre deux guides de lumières selon un exemple de réalisation de la présente invention ; [Fig. 5] schematically illustrates an optical coupling means between two light guides according to an exemplary embodiment of the present invention;
[Fig. 6] illustre schématiquement des contraintes de couplage optique entre deux guides de lumière selon un exemple de réalisation de la présente invention ; [Fig. 6] schematically illustrates optical coupling constraints between two light guides according to an exemplary embodiment of the present invention;
[Fig. 7] illustre schématiquement selon une variante de couplage de deux guides de lumières un exemple de réalisation de la présente invention ; [Fig. 7] schematically illustrates according to a variant of coupling of two light guides an exemplary embodiment of the present invention;
[Fig. 8] illustre schématiquement selon une variante de couplage de deux guides de lumières un exemple de réalisation de la présente invention ; [Fig. 8] schematically illustrates according to a variant of coupling of two light guides an exemplary embodiment of the present invention;
[Fig. 9] illustre schématiquement une variante de couplage de deux guides de lumières un exemple de réalisation de la présente invention. [Fig. 9] schematically illustrates a variant of coupling of two light guides, an exemplary embodiment of the present invention.
Description des exemples de réalisation Description of the implementation examples
Un système d’éclairage destiné à équiper un véhicule va maintenant être décrit dans ce qui va suivre en référence conjointement aux figures 2-9. Sauf indications contraires, les éléments communs ou analogues à plusieurs figures portent les mêmes signes de référence et présentent des caractéristiques identiques ou analogues, de sorte que ces éléments communs ne sont généralement pas à nouveau décrits par souci de simplicité. A lighting system intended to equip a vehicle will now be described in what follows with reference jointly to Figures 2-9. Unless otherwise indicated, elements common or similar to several figures bear the same reference signs and present identical or similar characteristics, so that these Common elements are generally not described again for the sake of simplicity.
Les figures 2-9 illustrent schématiquement un système d’éclairage selon un exemple de réalisation particulier non limitatif et divers variantes de réalisation. On considère par la suite, à titre d’exemple non limitatif, que le système d’éclairage est destinée à équiper un véhicule automobile, mais la présente invention ne se limite pas à cette application. Le système d’éclairage peut en effet équiper un quelconque véhicule, de type automobile ou de type véhicule terrestre motorisé (bus, car, camion, etc.), devant assurer au moins une fonction photométrique d’éclairage et/ou de signalisation. Figures 2-9 schematically illustrate a lighting system according to a particular non-limiting embodiment and various alternative embodiments. We consider below, by way of non-limiting example, that the lighting system is intended to equip a motor vehicle, but the present invention is not limited to this application. The lighting system can in fact equip any vehicle, automobile type or motorized land vehicle type (bus, coach, truck, etc.), which must provide at least one photometric lighting and/or signaling function.
De plus, on considère par la suite que le système d’éclairage comprend deux voire trois guides de lumière mais la présente invention ne se limite pas à ces nombres de guides de lumière. La présente invention s’étend à tout système d’éclairage qui comprendrait plus de trois guides de lumière couplés deux à deux ainsi qu’à des moyens de couplage qui redirige des photons selon une angle quelconque. In addition, it is subsequently considered that the lighting system comprises two or even three light guides but the present invention is not limited to these numbers of light guides. The present invention extends to any lighting system which would include more than three light guides coupled in pairs as well as to coupling means which redirect photons at any angle.
Les figures 2-9 illustrent différents aspects du système d’éclairage, différents exemples de réalisation mettant en œuvre certains de ces aspects étant décrits par la suite en référence aux figures. Figures 2-9 illustrate different aspects of the lighting system, different embodiments implementing some of these aspects being described below with reference to the figures.
La figure 2 illustre schématiquement un système d’éclairage 1 selon un exemple de réalisation de la présente invention. Figure 2 schematically illustrates a lighting system 1 according to an exemplary embodiment of the present invention.
Le système 1 comprend un masque de style 2. Le masque de style 2 est opaque et formée par exemple de matière plastique. System 1 includes a mask of style 2. The mask of style 2 is opaque and formed, for example, of plastic material.
Le masque 2 est opaque excepté dans certaines de ses parties 16 et 17, appelées fenêtres, à travers desquelles des parties de guides de lumière sont visibles, c’est-à- dire que des faisceaux de lumière sortent de ces fenêtres. Ces faisceaux de lumière sont issus de photons se propageant le long de ces guides de lumière positionnés derrière le masque de style 2. Mask 2 is opaque except in certain of its parts 16 and 17, called windows, through which parts of light guides are visible, that is to say that beams of light come out of these windows. These beams of light come from photons propagating along these light guides positioned behind the style 2 mask.
Selon un exemple de réalisation, au moins une des fenêtres du masque de style 2 est munie d’une matière translucide, de préférence possédant des optiques/billages par exemple en matière opaline, dans le but de flouter le ou chaque guide de lumière cylindrique visible à travers ladite au moins une fenêtre. According to an exemplary embodiment, at least one of the windows of the style 2 mask is provided with a translucent material, preferably having optics/billings per example in opaline material, with the aim of blurring the or each cylindrical light guide visible through said at least one window.
Le système d’éclairage 1 comprend une source de photons 11 , un premier guide de lumière cylindrique 12, un deuxième guide de lumière cylindrique 13 et un premier moyen de couplage optique 14. The lighting system 1 comprises a photon source 11, a first cylindrical light guide 12, a second cylindrical light guide 13 and a first optical coupling means 14.
Le premier guide de lumière cylindrique 12 comprend une première extrémité destinée à être éclairée par la source de photons 11 . Le deuxième guide de lumière cylindrique 13 comprend une première extrémité couplée à une deuxième extrémité du premier guide de lumière cylindrique 12 par un moyen de couplage optique 14 destiné à rediriger les photons arrivant à la deuxième extrémité du premier guide de lumière cylindrique 12 vers la première extrémité du deuxième guide de lumière cylindrique 13.The first cylindrical light guide 12 comprises a first end intended to be illuminated by the photon source 11. The second cylindrical light guide 13 comprises a first end coupled to a second end of the first cylindrical light guide 12 by optical coupling means 14 intended to redirect the photons arriving at the second end of the first cylindrical light guide 12 towards the first end of the second cylindrical light guide 13.
Selon une variante, le moyen de couplage optique 14 et la première extrémité du deuxième guide de lumière cylindrique 13 sont masqués pour obtenir un éclairage homogène. According to a variant, the optical coupling means 14 and the first end of the second cylindrical light guide 13 are masked to obtain homogeneous lighting.
Selon une variante, la deuxième extrémité du deuxième guide de lumière cylindrique 13 est obstruée. According to a variant, the second end of the second cylindrical light guide 13 is obstructed.
Le système d’éclairage 1 comprend également un moyen de renvoi lumineux 18 (figure 4) positionné au niveau de chaque partie du premier 12 et/ou du deuxième 13 guides de lumière cylindriques correspondante à une fenêtre du masque de style 2 pour que des photons se propageant le long du premier ou du deuxième guides de lumière cylindriques soient redirigés vers ladite fenêtre selon une direction souhaitée. The lighting system 1 also comprises a light return means 18 (FIG. 4) positioned at each part of the first 12 and/or the second 13 cylindrical light guides corresponding to a window of the style mask 2 so that photons propagating along the first or second cylindrical light guides are redirected towards said window in a desired direction.
Par exemple, le moyen optique de renvoi lumineux 18 redirige transversalement les photons se propageant longitudinalement le long d’un guide de lumière. For example, the optical light return means 18 transversely redirects the photons propagating longitudinally along a light guide.
La figure 3 illustre schématiquement un couplage de deux guides de lumière selon un exemple de réalisation de la présente invention. Figure 3 schematically illustrates a coupling of two light guides according to an exemplary embodiment of the present invention.
Le premier 12 et deuxième 13 de lumière cylindriques sont superposés longitudinalement l’un sur l’autre au moins sur l’une de leurs parties. Le moyen de couplage optique 14 est adapté pour rediriger les photons arrivant à l’extrémité du premier guide de lumière cylindrique 12 selon un angle de 180 degrés pour qu’ils se propagent le long du deuxième guide de lumière cylindrique 13. Au moins l’une des fenêtres du maque de style 2, appelée première fenêtre 16, a une de ses dimensions qui est inférieure à la somme des diamètres du premier 12 et 13 deuxième guides de lumière cylindriques et au moins l’une desdites fenêtres, appelée deuxième fenêtre 17, a une ses dimensions qui est au moins égale à la somme des diamètres des premier 12 et deuxième 13 guides de lumière cylindriques. The first 12 and second 13 of cylindrical light are superimposed longitudinally one on the other at least on one of their parts. The optical coupling means 14 is adapted to redirect the photons arriving at the end of the first cylindrical light guide 12 at an angle of 180 degrees so that they propagate along the second cylindrical light guide 13. At least one of the windows of the style model 2, called first window 16, has one of its dimensions which is less than the sum of the diameters of the first 12 and 13 second guides of cylindrical light guides and at least one of said windows, called second window 17, has a dimension which is at least equal to the sum of the diameters of the first 12 and second 13 cylindrical light guides.
Selon l’exemple de la figure 3, le maque de style 2 comprend trois premières fenêtres 16 rendant visibles trois parties du premier guide de lumière cylindrique 12 rendant visibles des parties du premier guide de lumière 12, et une deuxième fenêtre 17 rendant visible une partie du premier guide de lumière cylindrique 12 et une partie du deuxième guide de lumière cylindrique 13. According to the example of Figure 3, the style mask 2 comprises three first windows 16 making visible three parts of the first cylindrical light guide 12 making visible parts of the first light guide 12, and a second window 17 making visible a part of the first cylindrical light guide 12 and part of the second cylindrical light guide 13.
Selon une variante de l’exemple de réalisation de la figure 3, illustrée à la figure 5, le moyen de couplage optique 14 comprend un prisme comprenant deux faces à renvoi lumineux inclinées à 45 degrés. According to a variant of the exemplary embodiment of Figure 3, illustrated in Figure 5, the optical coupling means 14 comprises a prism comprising two light reflecting faces inclined at 45 degrees.
Les photons arrivant à la deuxième extrémité du premier guide de lumière cylindriquePhotons arriving at the second end of the first cylindrical light guide
12 sont redirigés vers la première extrémité du deuxième guide de lumière cylindrique12 are redirected towards the first end of the second cylindrical light guide
13 dont la base est située sur l’excroissance du prime. Le premier 12 et le deuxième 13 guides de lumière comprennent un moyen de renvoi lumineux 18 correspondant à chaque fenêtre 16 et 17 du masque de style 12. Du fait de la direction opposée des photons entre les 2 parties visibles des guides de lumière, les moyens de renvoi lumineux 18 positionnés le long du premier guide de lumière 12 et ceux positionnés le long du deuxième guide de lumière 13 ont des angles opposés pour que le faisceau de photons résultant suive une même direction souhaitée. 13 whose base is located on the outgrowth of the prime. The first 12 and the second 13 light guides comprise a light return means 18 corresponding to each window 16 and 17 of the style mask 12. Due to the opposite direction of the photons between the 2 visible parts of the light guides, the means light return 18 positioned along the first light guide 12 and those positioned along the second light guide 13 have opposite angles so that the resulting beam of photons follows the same desired direction.
La figure 6 illustre schématiquement des contraintes de couplage entre les deux guides de lumière cylindriques 12 et 13 selon le couplage optique de la figure 3. Figure 6 schematically illustrates the coupling constraints between the two cylindrical light guides 12 and 13 according to the optical coupling of Figure 3.
Pour avoir une bonne efficience optique (limite physique du principe de réflexion totale dans un milieu translucide), l’une de ces contraintes est que le galbe du premier guide de lumière cylindrique 12 a un angle positif (selon le sens anti-horaire) par rapport à la direction d’éclairage souhaitée D. Une autre de ces contraintes est que l’angle formé par les axes longitudinaux du premier et deuxième guides de lumière cylindriques soit positif (selon le sens antihoraire) par rapport à la direction d’éclairage souhaitée D, pour avoir une bonne efficience optique. To have good optical efficiency (physical limit of the principle of total reflection in a translucent medium), one of these constraints is that the curve of the first cylindrical light guide 12 has a positive angle (in the anti-clockwise direction) by relation to the desired lighting direction D. Another of these constraints is that the angle formed by the longitudinal axes of the first and second cylindrical light guides is positive (in the counterclockwise direction) with respect to the desired lighting direction D, to have good optical efficiency.
La figure 7 illustre schématiquement selon une variante de couplage des deux guides de lumières cylindriques 12 et 13 couplés selon le couplage optique de la figure 3.Figure 7 schematically illustrates according to a variant of coupling the two cylindrical light guides 12 and 13 coupled according to the optical coupling of Figure 3.
Selon cette variante, la deuxième extrémité du deuxième guide de lumière cylindrique 13 est reliée mécaniquement au premier guide de lumière 12, par exemple au moyen d’une nervure 21 . According to this variant, the second end of the second cylindrical light guide 13 is mechanically connected to the first light guide 12, for example by means of a rib 21.
Selon une variante, illustrée à la figure 8, le moyen de couplage optique 14 comprend une face à renvoi lumineux inclinée selon un angle inférieur ou égal à 90 degrés. According to a variant, illustrated in Figure 8, the optical coupling means 14 comprises a light return face inclined at an angle less than or equal to 90 degrees.
La figure 9 illustre schématiquement une variante de couplage de trois guides de lumières un exemple de réalisation de la présente invention. Figure 9 schematically illustrates a variant of coupling of three light guides, an exemplary embodiment of the present invention.
Selon cet exemple, la deuxième extrémité du premier guide de lumière cylindrique 12 est couplée à la première extrémité du deuxième guide de lumière cylindrique 13 par le moyen de couplage 14 prévu pour rediriger les photons selon un angle inférieur à 90 degrés. La deuxième extrémité du deuxième guide de lumière cylindriquel 3 est couplée à une première extrémité d’un troisième guide de lumière 19 par un deuxième moyen de couplage optique 20 prévu pour rediriger les photons selon un angle de 90 degrés.According to this example, the second end of the first cylindrical light guide 12 is coupled to the first end of the second cylindrical light guide 13 by the coupling means 14 provided to redirect the photons at an angle less than 90 degrees. The second end of the second cylindrical light guide 3 is coupled to a first end of a third light guide 19 by a second optical coupling means 20 provided to redirect the photons at an angle of 90 degrees.
Le principe de couplage optique entre deux guides de lumière par moyen de couplage optique peut s’étendre à plus de trois guides de lumières. The principle of optical coupling between two light guides by means of optical coupling can extend to more than three light guides.
Selon une variante, chaque source de photons peut, par exemple, comprendre au moins une diode électroluminescente ou au moins une diode laser ou encore au moins une ampoule. According to a variant, each source of photons can, for example, comprise at least one light-emitting diode or at least one laser diode or even at least one light bulb.
Selon une variante, ladite au moins un source de photons est portée par une carte électronique. According to one variant, said at least one photon source is carried by an electronic card.
La configuration de la ou des sources de photons en termes de nombre, positionnement, arrangement, type, etc. peut être adaptée par l’homme du métier selon le cas. La carte électronique comprend des moyens électroniques configurés pour contrôler le fonctionnement de chaque source de photons. Cette carte peut par exemple être une carte à circuits imprimés de type PCB (pour « Printed Circuit Board » en anglais). La carte électronique est portée par un plan c’est-à-dire que l’ensemble des sources de photons sont portées par ce plan. Un homme du métier comprendra que les exemples de réalisation et variantes décrits ci-avant ne constituent que des exemples non limitatifs de mise en œuvre de l’invention. En particulier, l’homme du métier pourra envisager une quelconque adaptation ou combinaison des exemples de réalisation et variantes décrits ci-avant, afin de répondre à un besoin bien particulier. La présente invention ne se limite donc pas aux exemples de réalisation décrits ci-avant mais s’étend notamment à un système d’éclairage qui inclurait des caractéristiques secondaires sans pour cela sortir de la portée de la présente invention. The configuration of the photon source(s) in terms of number, positioning, arrangement, type, etc. can be adapted by those skilled in the art as appropriate. The electronic card comprises electronic means configured to control the operation of each photon source. This card can for example be a printed circuit board of the PCB type (for “Printed Circuit Board” in English). The electronic card is carried by a plane, that is to say that all the photon sources are carried by this plane. A person skilled in the art will understand that the exemplary embodiments and variants described above constitute only non-limiting examples of implementation of the invention. In particular, those skilled in the art may consider any adaptation or combination of the exemplary embodiments and variants described above, in order to meet a very specific need. The present invention is therefore not limited to the exemplary embodiments described above but extends in particular to a lighting system which would include secondary characteristics without thereby departing from the scope of the present invention.
La présente invention concerne également un véhicule, par exemple automobile ou plus généralement un véhicule à moteur terrestre, comprenant au moins un système d’éclairage tel que décrit ci-avant. The present invention also relates to a vehicle, for example an automobile or more generally a land motor vehicle, comprising at least one lighting system as described above.

Claims

REVENDICATIONS Système d’éclairage (1 ) destiné à équiper un véhicule, comprenant CLAIMS Lighting system (1) intended to equip a vehicle, comprising
- une source de photons (11 ) ; - a source of photons (11);
- un premier guide de lumière cylindrique (12) comprenant une première extrémité destinée à être éclairée par la source de photons (11 ) ; - a first cylindrical light guide (12) comprising a first end intended to be illuminated by the photon source (11);
- un deuxième guide de lumière cylindrique (13) comprenant une première extrémité couplée à une deuxième extrémité du premier guide de lumière (12) par un moyen de couplage optique (14) destiné à rediriger les photons arrivant à la deuxième extrémité du premier guide de lumière cylindrique (12) vers la première extrémité du deuxième guide de lumière cylindrique (13) ; - a second cylindrical light guide (13) comprising a first end coupled to a second end of the first light guide (12) by optical coupling means (14) intended to redirect the photons arriving at the second end of the first light guide cylindrical light (12) towards the first end of the second cylindrical light guide (13);
- un masque (2) opaque comprenant des fenêtres (16, 17) au travers desquelles des parties du premier et/ou du deuxième guide de lumière cylindriques sont visibles ;- an opaque mask (2) comprising windows (16, 17) through which parts of the first and/or second cylindrical light guide are visible;
- un moyen de renvoi lumineux (18) étant positionné au niveau de chaque partie du premier (12) et/ou du deuxième (13) guide de lumière cylindriques correspondante à une fenêtre du masque de style (2) pour que des photons se propageant le long du premier (12) et/ou du deuxième (13) guides de lumière cylindriques soient redirigés vers ladite fenêtre selon une direction souhaitée. Système d’éclairage (1) selon la revendication 1 , dans lequel le moyen de couplage optique (14) et la première extrémité du deuxième guide de lumière cylindrique (13) sont masqués. Système d’éclairage (1) selon la revendication 1 ou 2, dans lequel au moins l’une desdites fenêtres est munie d’optique ou billages. Système d’éclairage (1) selon l’une des revendications 1 à 3, dans lequel une deuxième extrémité du deuxième guide de lumière cylindrique (13) est obstruée. Système d’éclairage (1) selon l’une des revendications précédentes, dans lequel- a light return means (18) being positioned at each part of the first (12) and/or second (13) cylindrical light guide corresponding to a window of the style mask (2) so that photons propagate along the first (12) and/or the second (13) cylindrical light guides are redirected towards said window in a desired direction. Lighting system (1) according to claim 1, in which the optical coupling means (14) and the first end of the second cylindrical light guide (13) are masked. Lighting system (1) according to claim 1 or 2, in which at least one of said windows is provided with optics or billages. Lighting system (1) according to one of claims 1 to 3, in which a second end of the second cylindrical light guide (13) is obstructed. Lighting system (1) according to one of the preceding claims, in which
- le premier (12) et deuxième (13) guides de lumière cylindriques sont superposés longitudinalement l’un sur l’autre au moins sur l’une de leurs parties ; - the first (12) and second (13) cylindrical light guides are superimposed longitudinally on each other at least on one of their parts;
- le moyen de couplage optique (14) est adapté pour rediriger les photons selon un angle de 180 degrés; - the optical coupling means (14) is adapted to redirect the photons according to a 180 degree angle;
- au moins l’une desdites fenêtres, appelée première fenêtre (16), a une de ses dimensions qui est inférieure à une somme des diamètres du premier (12) et deuxième (13) guides de lumière cylindriques ; et - at least one of said windows, called the first window (16), has one of its dimensions which is less than a sum of the diameters of the first (12) and second (13) cylindrical light guides; And
- au moins l’une desdites fenêtres, appelée deuxième fenêtre (17), a une de ses dimensions qui est au moins égale à la somme des diamètres des premier (12) et deuxième (13) guides de lumière cylindriques. Système d’éclairage (1) selon la revendication 5, dans lequel le moyen de couplage optique (14) comprend un prisme comprenant deux faces à renvoi lumineux inclinées à 45 degrés. Système d’éclairage (1) selon l’une des revendications 5 à 6, dans lequel la deuxième extrémité du deuxième guide de lumière cylindrique (13) est reliée mécaniquement au premier guide de lumière (12). Système d’éclairage (1) selon l’une des revendications 1 à 4, dans lequel le moyen de couplage optique (14) comprend une face à renvoi lumineux inclinée selon un angle inférieur ou égal à 90 degrés. Système d’éclairage selon l’une des revendications 1-3 ou 5-8, qui comporte en outre un troisième guide de lumière (19) comprenant une première extrémité couplée à la deuxième extrémité du deuxième guide de lumière par un autre moyen de couplage optique (20). Véhicule comprenant au moins un système d’éclairage (1 ) selon l’une des revendications précédentes. - at least one of said windows, called the second window (17), has one of its dimensions which is at least equal to the sum of the diameters of the first (12) and second (13) cylindrical light guides. Lighting system (1) according to claim 5, in which the optical coupling means (14) comprises a prism comprising two light return faces inclined at 45 degrees. Lighting system (1) according to one of claims 5 to 6, in which the second end of the second cylindrical light guide (13) is mechanically connected to the first light guide (12). Lighting system (1) according to one of claims 1 to 4, in which the optical coupling means (14) comprises a light return face inclined at an angle less than or equal to 90 degrees. Lighting system according to one of claims 1-3 or 5-8, which further comprises a third light guide (19) comprising a first end coupled to the second end of the second light guide by another coupling means optical (20). Vehicle comprising at least one lighting system (1) according to one of the preceding claims.
PCT/FR2023/051142 2022-08-24 2023-07-21 Double light guide involving end optical coupling WO2024042284A1 (en)

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FR2208481A FR3139177A1 (en) 2022-08-24 2022-08-24 Double light guide by optical coupling at the end

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DE102017102237A1 (en) * 2017-02-06 2018-08-09 HELLA GmbH & Co. KGaA Lighting device for a motor vehicle
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FR2208481A5 (en) 1972-11-22 1974-06-21 Porsche Ag
DE10259623A1 (en) * 2002-12-18 2004-07-08 Hella Kg Hueck & Co. Vehicle lamp for illuminating vehicle door mirrors comprises a support part on which are arranged an illuminating unit and a flexible optical waveguide with different cross-sectional dimensions along its progression
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DE102017102237A1 (en) * 2017-02-06 2018-08-09 HELLA GmbH & Co. KGaA Lighting device for a motor vehicle
EP3450253A1 (en) * 2017-08-29 2019-03-06 ZKW Group GmbH Lighting and/or signalling device for a motor vehicle

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