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EP4136384B1 - Cover glass for covering a housing of an optical element for a vehicle comprising a light guide - Google Patents

Cover glass for covering a housing of an optical element for a vehicle comprising a light guide Download PDF

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Publication number
EP4136384B1
EP4136384B1 EP21716490.4A EP21716490A EP4136384B1 EP 4136384 B1 EP4136384 B1 EP 4136384B1 EP 21716490 A EP21716490 A EP 21716490A EP 4136384 B1 EP4136384 B1 EP 4136384B1
Authority
EP
European Patent Office
Prior art keywords
partition
light guide
glass
light
support layer
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.)
Active
Application number
EP21716490.4A
Other languages
German (de)
French (fr)
Other versions
EP4136384A1 (en
Inventor
Rodolphe Peron
Damien SCHNURIGER
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.)
Stellantis Auto SAS
Original Assignee
Stellantis Auto SAS
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 Stellantis Auto SAS filed Critical Stellantis Auto SAS
Publication of EP4136384A1 publication Critical patent/EP4136384A1/en
Application granted granted Critical
Publication of EP4136384B1 publication Critical patent/EP4136384B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • 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
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • 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
    • F21S43/27—Attachment thereof

Definitions

  • the present invention relates to the technical field of lighting and signaling of motor vehicles.
  • the regulations require that every motor vehicle be equipped with signalling light devices, so as to be able to warn other road users of the position of the motor vehicle and the intentions of its driver.
  • An optical unit consists of an optical housing, in which are present lighting devices of the main beam, rear light, reversing light, indicator light and position light type.
  • the optical housing is closed by a transparent glass, in order to protect the lighting devices from the weather while allowing them to be seen by other road users.
  • the lighting devices are thus confined in optical housings, closed by flat or substantially flat glass.
  • the optical units are thus of little varied, little distinctive shapes.
  • the present invention aims to propose an original arrangement of an optical system through a glass, so as to allow the production of optical blocks of varied and distinctive shapes.
  • the invention proposes a glass intended to close an optical housing for a motor vehicle, comprising a partition and at least one guide. of light.
  • the invention is remarkable in that the partition is at least partially opaque and in that at least one light guide passes through said partition, such that a proximal end of the light guide faces an internal face of the partition and a distal end of the light guide faces an external face of the partition.
  • the invention proposes the passage of one or more light guides through a glass, so that the end of at least one light guide is visible outside an optical block closed by said glass.
  • the visible face of the optical block closed by the glass according to the invention has a three-dimensional shape that is clearly more distinctive than the flat or substantially flat shapes of current glass.
  • the invention therefore proposes an original arrangement of a light guide through a glass, so as to allow the production of optical blocks of varied and distinctive shapes.
  • glass means a partition intended to close an opening in an optical housing, so as to prevent the introduction of moisture and dust through said opening.
  • the external face of the partition is concave in shape. This embodiment advantageously makes it possible to position the distal end of the light guide passing through the partition, inside an optical housing.
  • the partition is opaque to daylight. This embodiment advantageously makes it possible to accentuate the aesthetics of the visible face of the optical unit, for example by allowing a color match between the external face of the partition and the bodywork of a motor vehicle.
  • At least one light guide is of longitudinal shape. According to a preferred embodiment, at least one light guide is of planar shape.
  • the inner face of the partition is covered by a transparent support layer.
  • the support layer is preferably transparent to daylight.
  • the term "support layer” means a layer that gives the partition a stable or substantially stable mechanical strength during normal use as a lens for an optical unit.
  • the support layer covers also a proximal end of at least one light guide passing through the septum.
  • the distal end of at least one light guide has a shape favorable to the emission of a light beam through said end, at an emission angle greater than 30°, preferably for an emission angle greater than 40° or greater than 70°.
  • a favorable shape may be a beveled, convex and/or grained shape.
  • the invention also relates to an optical unit comprising a glass for a motor vehicle, closed by a glass described above.
  • the internal face of the partition is covered by a transparent support layer and said support layer also covers said proximal end of at least one light guide passing through the partition.
  • the invention proposes an original arrangement of an optical system through a glass, so as to allow the production of optical blocks of varied and distinctive shapes.
  • FIG. 1 illustrates a first non-limiting embodiment of a glass 2 according to the invention, intended to close an optical housing of an optical unit for a motor vehicle.
  • the glass comprises an opaque partition 4, preferably black in color.
  • the partition is delimited by an internal face 6, intended to be opposite the interior of an optical housing, and an external face 8 opposite the internal face 6, intended to be in contact with the environment outside the optical housing.
  • the external face 8 of the partition is of concave shape, preferably of elliptical shape.
  • the internal face 6 is parallel or substantially parallel to the external face 8.
  • the thickness of the partition 4, defined in a direction normal to the external face 8, is between 2 mm and 10 mm, preferably between 2 mm and 5 mm.
  • the partition 4 is formed from a polymer-based material.
  • the partition 4 is made from polymethyl methacrylate, also known by the abbreviation PMMA.
  • the glass 2 is crossed by two light guides 10 of flat shape.
  • the light guides are arranged so as to be parallel or substantially parallel to each other.
  • Each light guide 10 has a proximal end 12, facing the internal face 6 of the partition, and a distal end 14, facing the external face 8 of the partition.
  • the proximal ends 12A, 12B of the light guides are intended to be illuminated by light devices present in an optical housing, and the proximal ends distal 14A, 14B to project outside the optical housing the light beams emitted by said devices.
  • the proximal and distal ends of the same light guide may be separated by a distance of between 1 cm and 50 cm, preferably between 5 cm and 10 cm.
  • the distal ends of the light guides are preferably adapted according to the light signal emitted by the light devices illuminating them.
  • the light guide 10A is beveled at its distal end 14A, in order to orient the emitted light beam in a desired direction.
  • the distal end 14B of the light guide 10B is convex in shape and its surface is grained, in order to promote a greater diffusion angle of the emitted light beam.
  • the light guides 10 are secured to the partition by known means, such as gluing, welding or other.
  • a weld 16 made by ultrasound connects each light guide 10 to the partition 4.
  • the welds 20 are made by vibrations, ultrasound or light radiation (LASER).
  • the glass 2 also comprises a support layer 18, covering the proximal ends 12 of the light guides as well as the internal face 6 of the partition 4.
  • the support layer is transparent to daylight and made from polymethyl methacrylate.
  • the support layer can advantageously reinforce the mechanical strength of the partition, so as to allow the preservation of the shape of the glass during normal use.
  • the thickness of the support layer defined in a direction normal to the internal face 6 of the partition is between 2 mm and 10 mm, preferably between 2 mm and 5 mm.
  • the support layer 18 is provided with teeth 20, at its periphery, intended to bear against the edges of an optical housing, as illustrated below.
  • the support layer is held against the internal face 6 of the partition, so as to subsequently prevent the introduction of a liquid or a gas between the support layer 18 and the partition 4.
  • ultrasonic welds 20 are produced between the partition 4 and the support layer 18, at their periphery, so as to seal the space between the partition and the support layer.
  • the welds 20 are made by vibrations, ultrasound or light radiation (LASER).
  • FIG. 2 now illustrates a schematic section of an optical unit 22 for a motor vehicle, comprising an optical housing 24 closed by a glass 2 described above.
  • the optical housing 24 comprises light-emitting diode type light devices 26, arranged opposite the proximal ends 12 of the light guides, so as to allow the diffusion of light beams emitted by said devices, at the distal ends 14 of the light guides.
  • the glass 2 is held to the optical housing 24, in a hermetic manner, by means of welds 20 made between the teeth 20 and the optical housing.
  • the welds 20 are made by vibrations, ultrasound or light radiation (LASER).
  • the glass 2 according to the invention allows the distal ends 14 of the light guides to be positioned outside the optical housing 24.
  • the light beams emitted by the distal ends of the light guides 10 are not likely to be deflected and/or absorbed by a transparent or partially transparent wall closing the optical housing.
  • the invention allows better control of the photometric visibility angles of the light signals emitted by the optical unit 22.
  • the partial presence of the light guides outside the optical housing 24 gives a three-dimensional appearance to the visible face of the optical unit 22. It is thus possible to produce very diverse and varied shapes, so as to allow greater differentiation between the optical units, for example by playing on the positioning of the light guides between them and/or the projecting length of the light guides.
  • the present invention also relates to a method of manufacturing an ice 2 described above.
  • the manufacturing method according to the invention implements a first perforation step illustrated by the figure 3 .
  • passages 28 are provided through a partition 4 as described above.
  • the passages are sized to allow the insertion of planar light guides 10, during a second step illustrated by the figure 4 .
  • the light guides are secured to the partition by known means, such as glue or welds 16 carried out by ultrasound.
  • the internal face 6 of the partition is covered by a support layer 18.
  • the support layer is of a complementary shape to the internal face 6, so as to facilitate their superposition.
  • the partition 4 and the support layer 18 are joined in a sealed manner by known means, such as glue or welds 20 carried out by ultrasound.
  • the partition 4, the light guides 10 and the support layer 18 are made from a common material, polymethyl methacrylate, in order to facilitate and guarantee good welding between them.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

La présente invention concerne le domaine technique de l'éclairage et de la signalisation des véhicules automobiles.The present invention relates to the technical field of lighting and signaling of motor vehicles.

La réglementation impose que chaque véhicule automobile soit équipé de dispositifs lumineux de signalisation, de manière à pouvoir avertir les autres utilisateurs de la route de la position du véhicule automobile et des intentions de son conducteur.The regulations require that every motor vehicle be equipped with signalling light devices, so as to be able to warn other road users of the position of the motor vehicle and the intentions of its driver.

Afin de faciliter l'assemblage des dispositifs d'éclairage et de signalisation sur les véhicules automobiles, ceux-ci sont regroupés dans des blocs optiques. Un bloc optique se compose d'un boîtier optique, dans lequel sont présents des dispositifs lumineux du type feu de route, feu arrière, feu de recul, feu de clignotant et feu de position. Le boîtier optique est obturé par une glace transparente, afin de protéger les dispositifs lumineux des intempéries tout en permettant leur visibilité par les autres utilisateurs de la route. Les dispositifs lumineux sont ainsi confinés dans des boîtiers optiques, obturés par des glaces de forme plane ou sensiblement plane. Les blocs optiques sont ainsi de formes peu variées, peu distinctives.In order to facilitate the assembly of lighting and signaling devices on motor vehicles, these are grouped in optical units. An optical unit consists of an optical housing, in which are present lighting devices of the main beam, rear light, reversing light, indicator light and position light type. The optical housing is closed by a transparent glass, in order to protect the lighting devices from the weather while allowing them to be seen by other road users. The lighting devices are thus confined in optical housings, closed by flat or substantially flat glass. The optical units are thus of little varied, little distinctive shapes.

On connait par le document FR3046579 un bloc optique comprenant un feu de signalisation doté d'un guide de lumière plat saillant de sa glace extérieure. On connait par le document FR3002895 un dispositif d'indication de changement de direction d'un véhicule, à guide de lumière et écran opalin.We know from the document FR3046579 an optical unit comprising a signaling light equipped with a flat light guide projecting from its outer glass. We know from the document FR3002895 a device for indicating a change of direction of a vehicle, with a light guide and opaline screen.

La présente invention vise à proposer un agencement original d'un système optique à travers une glace, de sorte à permettre la réalisation de blocs optiques de formes variées et distinctives.The present invention aims to propose an original arrangement of an optical system through a glass, so as to allow the production of optical blocks of varied and distinctive shapes.

À cet effet, l'invention propose une glace destinée à obturer un boîtier optique pour véhicule automobile, comprenant une cloison et au moins un guide de lumière. L'invention est remarquable en ce que la cloison est au moins partiellement opaque et en ce qu'au moins un guide de lumière traverse ladite cloison, de sorte qu'une extrémité proximale du guide de lumière soit en vis-à-vis d'une face interne de la cloison et qu'une extrémité distale du guide de lumière soit en vis-à-vis d'une face externe de la cloison.For this purpose, the invention proposes a glass intended to close an optical housing for a motor vehicle, comprising a partition and at least one guide. of light. The invention is remarkable in that the partition is at least partially opaque and in that at least one light guide passes through said partition, such that a proximal end of the light guide faces an internal face of the partition and a distal end of the light guide faces an external face of the partition.

En d'autres termes, l'invention propose le passage d'un ou plusieurs guides de lumière à travers une glace, de sorte que l'extrémité d'au moins un guide de lumière soit apparente à l'extérieur d'un bloc optique obturé par ladite glace. Ainsi, la face visible du bloc optique obturé par la glace selon l'invention, présente une forme en trois dimensions nettement plus distinctives que les formes planes ou sensiblement plane des glaces actuelles. L'invention propose donc un agencement original d'un guide de lumière à travers une glace, de sorte à permettre la réalisation de blocs optiques de formes variées et distinctives.In other words, the invention proposes the passage of one or more light guides through a glass, so that the end of at least one light guide is visible outside an optical block closed by said glass. Thus, the visible face of the optical block closed by the glass according to the invention has a three-dimensional shape that is clearly more distinctive than the flat or substantially flat shapes of current glass. The invention therefore proposes an original arrangement of a light guide through a glass, so as to allow the production of optical blocks of varied and distinctive shapes.

Par le terme « glace », on entend une cloison destinée à obturer une ouverture d'un boîtier optique, de sorte à empêcher l'introduction d'humidité et de poussières par ladite ouverture.The term "glass" means a partition intended to close an opening in an optical housing, so as to prevent the introduction of moisture and dust through said opening.

Selon une variante de réalisation de l'invention, la face externe de la cloison est de forme concave. Ce mode de réalisation permet avantageusement de positionner l'extrémité distale du guide de lumière traversant la cloison, à l'intérieur d'un boîtier optique.According to an alternative embodiment of the invention, the external face of the partition is concave in shape. This embodiment advantageously makes it possible to position the distal end of the light guide passing through the partition, inside an optical housing.

Selon une autre variante de réalisation de l'invention, la cloison est opaque à la lumière du jour. Ce mode de réalisation permet avantageusement d'accentuer l'esthétisme de la face visible du bloc optique, par exemple en permettant un accord de couleur entre la face externe de la cloison et la carosserie d'un véhicule automobile.According to another variant embodiment of the invention, the partition is opaque to daylight. This embodiment advantageously makes it possible to accentuate the aesthetics of the visible face of the optical unit, for example by allowing a color match between the external face of the partition and the bodywork of a motor vehicle.

Selon une autre variante de réalisation de l'invention, au moins un guide de lumière est de forme longitudinale. Selon un mode de réalisation préférée, au moins un guide de lumière est de forme plane.According to another embodiment of the invention, at least one light guide is of longitudinal shape. According to a preferred embodiment, at least one light guide is of planar shape.

Selon l'invention, la face interne de la cloison est recouverte par une couche de support transparente. La couche de support est de préférence transparente à la lumière du jour. Par les termes « couche de support », on entend une couche conférant à la cloison une tenue mécanique stable ou sensiblement stable lors d'une utilisation normale en tant que glace pour bloc optique. Selon l'invention, la couche de support recouvre également une extrémité proximale d'au moins un guide de lumière traversant la cloison.According to the invention, the inner face of the partition is covered by a transparent support layer. The support layer is preferably transparent to daylight. The term "support layer" means a layer that gives the partition a stable or substantially stable mechanical strength during normal use as a lens for an optical unit. According to the invention, the support layer covers also a proximal end of at least one light guide passing through the septum.

Selon une autre variante de réalisation de l'invention, l'extrémité distale d'au moins un guide de lumière, comporte une forme favorable à l'émission d'un faisceau lumineux à travers ladite extrémité, selon un angle d'émission supérieur à 30°, de préférence pour un angle d'émission supérieur à 40° ou supérieur à 70°. Une forme favorable peut être une forme biseautée, convexe et/ou grainée.According to another embodiment of the invention, the distal end of at least one light guide has a shape favorable to the emission of a light beam through said end, at an emission angle greater than 30°, preferably for an emission angle greater than 40° or greater than 70°. A favorable shape may be a beveled, convex and/or grained shape.

L'invention concerne également un bloc optique comprenant une glace pour véhicule automobile, obturé par une glace décrite ci-dessus.The invention also relates to an optical unit comprising a glass for a motor vehicle, closed by a glass described above.

L'invention concerne aussi un procédé de fabrication d'une glace destinée à obturer un boîtier optique pour un véhicule automobile, mettant en oeuvre les étapes suivantes :

  • perforation d'une cloison au moins partiellement opaque, de sorte à ménager au moins un passage à travers la cloison ; puis
  • insertion d'un guide de lumière dans au moins un passage, de sorte qu'une extrémité proximale du guide de lumière soit en vis-à-vis d'une face interne de la cloison et qu'une extrémité distale du guide de lumière soit en vis-à-vis d'une face externe de la cloison ; puis
  • solidarisation du guide de lumière à la cloison.
The invention also relates to a method of manufacturing a glass intended to seal an optical housing for a motor vehicle, implementing the following steps:
  • perforation of an at least partially opaque partition, so as to provide at least one passage through the partition; then
  • inserting a light guide into at least one passage, such that a proximal end of the light guide faces an internal face of the partition and a distal end of the light guide faces an external face of the partition; then
  • securing the light guide to the partition.

Selon l'invention, la face interne de la cloison est recouverte par une couche de support transparente et la dite couche du support recouvre également ladite extrémité proximale d'au moins un guide de lumière traversant la cloison.According to the invention, the internal face of the partition is covered by a transparent support layer and said support layer also covers said proximal end of at least one light guide passing through the partition.

D'autres avantages et caractéristiques pourront ressortir plus clairement de la description qui va suivre.Other advantages and features may become more apparent from the description that follows.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitative et faite en se référant aux dessins dans lesquels :

  • [Fig. 1] représente une coupe longitudinale schématique d'une glace selon l'invention ;
  • [Fig. 2] représente une coupe longitudinale schématique d'un bloc optique comprenant un boîtier optique obturé par une glace illustrée par la figure 1 ;
  • [Fig. 3] représente une première étape de fabrication d'une glace selon l'invention ;
  • [Fig. 4] représente une deuxième étape de fabrication d'une glace selon l'invention ;
  • [Fig. 5] représente une troisième étape de fabrication d'une glace selon l'invention ;
  • [Fig. 6] représente une quatrième étape de fabrication d'une glace selon l'invention.
The invention will be better understood upon reading the following description, given solely as a non-limiting example and with reference to the drawings in which:
  • [ Fig. 1 ] represents a schematic longitudinal section of a glass according to the invention;
  • [ Fig. 2 ] represents a schematic longitudinal section of an optical block comprising an optical housing closed by a glass illustrated by the figure 1 ;
  • [ Fig. 3 ] represents a first step in manufacturing an ice cream according to the invention;
  • [ Fig. 4 ] represents a second step in manufacturing an ice cream according to the invention;
  • [ Fig. 5 ] represents a third step in the manufacture of an ice cream according to the invention;
  • [ Fig. 6 ] represents a fourth step in the manufacture of an ice cream according to the invention.

Dans ces figures, les mêmes références sont utilisées pour désigner les mêmes éléments.In these figures, the same references are used to designate the same elements.

Pour rappel, l'invention propose un agencement original d'un système optique à travers une glace, de sorte à permettre la réalisation de blocs optiques de formes variées et distinctives.As a reminder, the invention proposes an original arrangement of an optical system through a glass, so as to allow the production of optical blocks of varied and distinctive shapes.

La figure 1 illustre un premier mode de réalisation non limitatif d'une glace 2 selon l'invention, destinée à obturer un boîtier optique d'un bloc optique pour véhicule automobile.There figure 1 illustrates a first non-limiting embodiment of a glass 2 according to the invention, intended to close an optical housing of an optical unit for a motor vehicle.

Selon ce premier mode de réalisation, la glace comprend une cloison 4 opaque, de préférence de couleur noire. La cloison est délimitée par une face interne 6, destinée à être en vis-à-vis de l'intérieur d'un boîtier optique, et une face externe 8 opposée à la face interne 6, destinée à être en contact avec l'environnement extérieur au boîtier optique.According to this first embodiment, the glass comprises an opaque partition 4, preferably black in color. The partition is delimited by an internal face 6, intended to be opposite the interior of an optical housing, and an external face 8 opposite the internal face 6, intended to be in contact with the environment outside the optical housing.

Selon le présent exemple, la face externe 8 de la cloison est de forme concave, de préférence de forme elliptique. La face interne 6 est parallèle ou sensiblement parallèle à la face externe 8.According to the present example, the external face 8 of the partition is of concave shape, preferably of elliptical shape. The internal face 6 is parallel or substantially parallel to the external face 8.

L'épaisseur de la cloison 4, définie selon une direction normale à la face externe 8, est comprise entre 2 mm et 10 mm, de préférence entre 2 mm et 5 mm. La cloison 4 est formée à partir d'un matériau à base de polymère. À titre d'exemple non limitatif, la cloison 4 est réalisée à partir de polyméthacrylate de méthyle, également connu sous l'abrégé PMMA.The thickness of the partition 4, defined in a direction normal to the external face 8, is between 2 mm and 10 mm, preferably between 2 mm and 5 mm. The partition 4 is formed from a polymer-based material. As a non-limiting example, the partition 4 is made from polymethyl methacrylate, also known by the abbreviation PMMA.

La glace 2 est traversée par deux guides de lumière 10 de forme plane. Les guides de lumière sont agencés de sorte à être parallèles ou sensiblement parallèles entre eux. Chaque guide de lumière 10 comporte une extrémité proximale 12, en vis-à-vis de la face interne 6 de la cloison, et une extrémité distale 14, en vis-à-vis de la face externe 8 de la cloison. Les extrémités proximales 12A, 12B des guides de lumières sont destinées à être éclairées par des dispositifs lumineux présents dans un boîtier optique, et les extrémités distales 14A, 14B à projeter à l'extérieur du boîtier optique les faisceaux lumineux émis par lesdits dispositifs. Les extrémités proximales et distales d'un même guide de lumière peuvent être éloignées d'une distance comprise entre 1 cm et 50 cm, de préférence entre 5 cm et 10 cm.The glass 2 is crossed by two light guides 10 of flat shape. The light guides are arranged so as to be parallel or substantially parallel to each other. Each light guide 10 has a proximal end 12, facing the internal face 6 of the partition, and a distal end 14, facing the external face 8 of the partition. The proximal ends 12A, 12B of the light guides are intended to be illuminated by light devices present in an optical housing, and the proximal ends distal 14A, 14B to project outside the optical housing the light beams emitted by said devices. The proximal and distal ends of the same light guide may be separated by a distance of between 1 cm and 50 cm, preferably between 5 cm and 10 cm.

Les extrémités distales des guides de lumière sont de préférence adaptées en fonction du signal lumineux émis par les dispositifs lumineux les éclairant. Selon le présent exemple, le guide de lumière 10A est biseauté au niveau de son extrémité distale 14A, afin d'orienter le faisceau lumineux émis selon une direction souhaitée. L'extrémité distale 14B du guide de lumière 10B est de forme convexe et sa surface est grainée, afin de favoriser un angle de diffusion plus important du faisceau lumineux émis.The distal ends of the light guides are preferably adapted according to the light signal emitted by the light devices illuminating them. According to the present example, the light guide 10A is beveled at its distal end 14A, in order to orient the emitted light beam in a desired direction. The distal end 14B of the light guide 10B is convex in shape and its surface is grained, in order to promote a greater diffusion angle of the emitted light beam.

Les guides de lumière 10 sont solidarisés à la cloison par des moyens connus, de type collage, soudage ou autre. Selon le présent exemple, une soudure 16 réalisée par ultrasons relie chaque guide de lumière 10 à la cloison 4. De préférence, les soudures 20 sont réalisées par vibrations, ultrasons ou rayonnement lumineux (LASER).The light guides 10 are secured to the partition by known means, such as gluing, welding or other. According to the present example, a weld 16 made by ultrasound connects each light guide 10 to the partition 4. Preferably, the welds 20 are made by vibrations, ultrasound or light radiation (LASER).

La glace 2 comporte également une couche de support 18, recouvrant les extrémités proximales 12 des guides de lumière ainsi que la face interne 6 de la cloison 4. Selon le présent exemple, la couche de support est transparente à la lumière du jour et réalisée à partir de polyméthacrylate de méthyle. La couche de support peut avantageusement renforcer la tenue mécanique de la cloison, de manière à permettre la préservation de la forme de la glace lors d'une utilisation normale. Selon le présent exemple, l'épaisseur de la couche de support définie selon une direction normale à la face interne 6 de la cloison est comprise entre 2 mm et 10 mm, de préférence entre 2 mm et 5 mm.The glass 2 also comprises a support layer 18, covering the proximal ends 12 of the light guides as well as the internal face 6 of the partition 4. According to the present example, the support layer is transparent to daylight and made from polymethyl methacrylate. The support layer can advantageously reinforce the mechanical strength of the partition, so as to allow the preservation of the shape of the glass during normal use. According to the present example, the thickness of the support layer defined in a direction normal to the internal face 6 of the partition is between 2 mm and 10 mm, preferably between 2 mm and 5 mm.

La couche de support 18 est munie de dents 20, au niveau de sa périphérie, destinées à prendre appui contre les bords d'un boîtier optique, comme illustré ci-dessous.The support layer 18 is provided with teeth 20, at its periphery, intended to bear against the edges of an optical housing, as illustrated below.

De préférence, la couche de support est maintenue contre la face interne 6 de la cloison, de manière à prévenir ultérieurement l'introduction d'un liquide ou d'un gaz entre la couche de support 18 et la cloison 4. Selon le présent exemple, des soudures 20 par ultrasons sont réalisées entre la cloison 4 et la couche de support 18, au niveau de leur périphérie, de sorte à rendre étanche l'espace entre la cloison et la couche de support. De préférence, les soudures 20 sont réalisées par vibrations, ultrasons ou rayonnement lumineux (LASER).Preferably, the support layer is held against the internal face 6 of the partition, so as to subsequently prevent the introduction of a liquid or a gas between the support layer 18 and the partition 4. According to the present example, ultrasonic welds 20 are produced between the partition 4 and the support layer 18, at their periphery, so as to seal the space between the partition and the support layer. Preferably, the welds 20 are made by vibrations, ultrasound or light radiation (LASER).

La figure 2 illustre à présent une coupe schématique d'un bloc optique 22 pour véhicule automobile, comprenant un boîtier optique 24 obturé par une glace 2 décrite ci-dessus. Le boîtier optique 24 comprend des dispositifs lumineux 26 de type diodes électroluminescents, agencés en vis-à-vis des extrémités proximales 12 des guides de lumières, de manière à permettre la diffusion de faisceaux lumineux émis par lesdits dispositifs, au niveau des extrémités distales 14 des guides de lumière. La glace 2 est maintenue au boîtier optique 24, de façon hermétique, par l'intermédiaire de soudures 20 réalisées entre les dents 20 et le boîtier optique. De préférence, les soudures 20 sont réalisées par vibrations, ultrasons ou rayonnement lumineux (LASER).There figure 2 now illustrates a schematic section of an optical unit 22 for a motor vehicle, comprising an optical housing 24 closed by a glass 2 described above. The optical housing 24 comprises light-emitting diode type light devices 26, arranged opposite the proximal ends 12 of the light guides, so as to allow the diffusion of light beams emitted by said devices, at the distal ends 14 of the light guides. The glass 2 is held to the optical housing 24, in a hermetic manner, by means of welds 20 made between the teeth 20 and the optical housing. Preferably, the welds 20 are made by vibrations, ultrasound or light radiation (LASER).

De façon avantageuse, la glace 2 selon l'invention permet le positionnement des extrémités distales 14 des guides de lumière à l'extérieur du boîtier optique 24. Ainsi, les faisceaux lumineux émis par les extrémités distales des guides de lumière 10 ne sont pas susceptibles d'être déviés et/ou absorber par une paroi transparente ou partiellement transparente obturant le boîtier optique. De ce fait, l'invention permet un meilleur contrôle des angles de visibilité photométrique des signaux lumineux émis par le bloc optique 22. Selon un autre avantage, la présence partielle des guides de lumière à l'extérieur du boîtier optique 24 confère un aspect en trois dimensions de la face visible du bloc optique 22. Il est ainsi possible de réaliser des formes très diverses et variées, de sorte à permettre une plus grande différenciation entre les bloques optiques, en jouant par exemple sur le positionnement des guides lumières entre eux et/ou la longueur saillante des guides de lumières.Advantageously, the glass 2 according to the invention allows the distal ends 14 of the light guides to be positioned outside the optical housing 24. Thus, the light beams emitted by the distal ends of the light guides 10 are not likely to be deflected and/or absorbed by a transparent or partially transparent wall closing the optical housing. As a result, the invention allows better control of the photometric visibility angles of the light signals emitted by the optical unit 22. According to another advantage, the partial presence of the light guides outside the optical housing 24 gives a three-dimensional appearance to the visible face of the optical unit 22. It is thus possible to produce very diverse and varied shapes, so as to allow greater differentiation between the optical units, for example by playing on the positioning of the light guides between them and/or the projecting length of the light guides.

La présente invention porte également sur un procédé de fabrication d'une glace 2 décrite ci-dessus.The present invention also relates to a method of manufacturing an ice 2 described above.

Le procédé de fabrication selon l'invention, met en oeuvre une première étape de perforation illustrée par la figure 3. Lors de cette étape, des passages 28 sont ménagés à travers une cloison 4 telle que décrite ci-dessus.The manufacturing method according to the invention implements a first perforation step illustrated by the figure 3 . During this step, passages 28 are provided through a partition 4 as described above.

Les passages sont dimensionnés de manière à permettre l'insertion de guides de lumière 10 de forme plane, lors d'une deuxième étape illustrée par la figure 4.The passages are sized to allow the insertion of planar light guides 10, during a second step illustrated by the figure 4 .

Lors d'une troisième étape illustrée par la figure 5, les guides de lumière sont solidarisés à la cloison par des moyens connus, de type colle ou soudures 16 réalisées par ultrasons.In a third stage illustrated by the figure 5 , the light guides are secured to the partition by known means, such as glue or welds 16 carried out by ultrasound.

Lors d'une quatrième étape illustrée par la figure 6, la face interne 6 de la cloison est recouverte par une couche de support 18. La couche de support est de forme complémentaire à la face interne 6, de manière faciliter leur superposition.During a fourth stage illustrated by the figure 6 , the internal face 6 of the partition is covered by a support layer 18. The support layer is of a complementary shape to the internal face 6, so as to facilitate their superposition.

Lors d'une cinquième étape illustrée par la figure 1, la cloison 4 et la couche de support 18 sont solidarisée de façon étanche par des moyens connus, de type colle ou soudures 20 réalisées par ultrasons. De préférence, la cloison 4, les guides de lumière 10 et la couche de support 18 sont réalisées à partir d'un matériau commun, le polyméthacrylate de méthyle, afin de faciliter et garantir une bonne soudure entre elles.During a fifth stage illustrated by the figure 1 , the partition 4 and the support layer 18 are joined in a sealed manner by known means, such as glue or welds 20 carried out by ultrasound. Preferably, the partition 4, the light guides 10 and the support layer 18 are made from a common material, polymethyl methacrylate, in order to facilitate and guarantee good welding between them.

Claims (7)

  1. Glass (2) intended to close an optical housing for a motor vehicle, comprising a partition (4) and at least one light guide (10A, 10B), the partition (4) is at least partially opaque and in this that at least one light guide (10A, 10B) passes through said partition (4) so that a proximal end (12A, 12B) of the light guide (10A, 10B) faces a internal face (6) of the partition (4) and that a distal end (14A, 14B) of the light guide (10A, 10B) faces an external face (8) of the partition (4), characterized in that the internal face (6) of the partition (4) is covered by a transparent support layer (18), and in that the support layer (18) also covers a proximal end (12A, 12B) of at least one light guide (10A, 10B) passing through the partition (4).
  2. Glass (2) according to claim 1, characterized in that the external face (8) of the partition (4) is concave in shape.
  3. Glass (2) according to claim 1 or 2, characterized in that the partition (4) is opaque to daylight.
  4. Glass (2) according to one of claims 1 to 3, characterized in that at least one light guide (10A, 10B) is of longitudinal shape.
  5. Glass (2) according to one of claims 1 to 4, characterized in that the distal end (14A, 14B) of at least one light guide (10A, 10B) has a beveled shape, convex and/or grained, allowing the emission of a light beam through said end, at an emission angle greater than 30°.
  6. Optical unit (22) for a motor vehicle, comprising a glass (2) according to one of claims 1 to 5, closing an opening in an optical housing (24).
  7. Process for manufacturing a lens (2) intended to close an optical housing for a motor vehicle, the process implements the following steps:
    - perforation of a partition (4) at least partially opaque so as to provide at least one passage (28) through the partition (4); Then
    - insertion of a light guide (10A, 10B) in at least one passage (28) so that a proximal end (12A, 12B) of the light guide (10A, 10B) is opposite an internal face (6) of the partition (4) and that a distal end (14A, 14B) of the light guide (10A, 10B) faces an external face (8) of the partition (4); Then
    - securing the light guide (10A, 10B) to the partition (4); characterized in that
    - said internal face (6) of said partition (4) is covered by a transparent support layer (18), said support layer (18) also covering said proximal end (12A, 12B) of at least one light guide ( 10A, 10B) passing through the partition (4).
EP21716490.4A 2020-04-15 2021-03-10 Cover glass for covering a housing of an optical element for a vehicle comprising a light guide Active EP4136384B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2003747A FR3109427A1 (en) 2020-04-15 2020-04-15 Glass intended to close an optical housing for a motor vehicle, comprising a partition and at least one light guide
PCT/FR2021/050401 WO2021209694A1 (en) 2020-04-15 2021-03-10 Lens intended to close a lamp housing for a motor vehicle, comprising a wall and at least one light guide

Publications (2)

Publication Number Publication Date
EP4136384A1 EP4136384A1 (en) 2023-02-22
EP4136384B1 true EP4136384B1 (en) 2024-08-21

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Application Number Title Priority Date Filing Date
EP21716490.4A Active EP4136384B1 (en) 2020-04-15 2021-03-10 Cover glass for covering a housing of an optical element for a vehicle comprising a light guide

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Country Link
EP (1) EP4136384B1 (en)
CN (1) CN115398145A (en)
FR (1) FR3109427A1 (en)
WO (1) WO2021209694A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2681485B1 (en) * 2011-03-04 2016-06-22 Automotive Lighting Italia S.p.A. Automotive lighting unit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2748981A1 (en) * 1977-11-02 1979-05-03 Reitter & Schefenacker Kg Vehicle lighting unit comprises reflector with light bulb and cover - which is two-ply laminate of clear polycarbonate and transparent opt. coloured PMMA
DE102012022277B4 (en) * 2012-11-14 2024-07-18 Volkswagen Aktiengesellschaft Lighting device with a light disc and method for producing a light disc for a lighting device
FR3002895B1 (en) * 2013-03-05 2016-12-23 Peugeot Citroen Automobiles Sa DIRECTION CHANGE INDICATION DEVICE OF A VEHICLE WITH A LIGHT GUIDE AND OPALIN SCREEN
FR3014787B1 (en) * 2013-12-12 2016-01-01 Peugeot Citroen Automobiles Sa LIGHT SIGNALING DIPOSITIVE
FR3046579A1 (en) * 2016-01-11 2017-07-14 Peugeot Citroen Automobiles Sa OPTICAL BLOCK COMPRISING A SIGNALING LIGHT WITH A FLAT LIGHT GUIDE OF ITS EXTERIOR ICE
FR3074259B1 (en) * 2017-11-30 2020-10-09 Psa Automobiles Sa LIGHTING DEVICE WITH LIGHT GUIDE (S) WITH INVISIBLE PHOTON SOURCE (S), FOR A VEHICLE

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2681485B1 (en) * 2011-03-04 2016-06-22 Automotive Lighting Italia S.p.A. Automotive lighting unit

Also Published As

Publication number Publication date
CN115398145A (en) 2022-11-25
WO2021209694A1 (en) 2021-10-21
EP4136384A1 (en) 2023-02-22
FR3109427A1 (en) 2021-10-22

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