EP3994389B1 - Luminous signalling device for a vehicle - Google Patents

Luminous signalling device for a vehicle Download PDF

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Publication number
EP3994389B1
EP3994389B1 EP20747052.7A EP20747052A EP3994389B1 EP 3994389 B1 EP3994389 B1 EP 3994389B1 EP 20747052 A EP20747052 A EP 20747052A EP 3994389 B1 EP3994389 B1 EP 3994389B1
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EP
European Patent Office
Prior art keywords
light
elu
luminous element
pgl
glass
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
EP20747052.7A
Other languages
German (de)
French (fr)
Other versions
EP3994389A1 (en
Inventor
Jean Francois DOAN
Philippe POILANE
Nathalie Larribeau
Pierre Mazerolle
Damien SCHNURIGER
Fabrice Sagorin
Mathieu Collot
Cédric SERMONAT
Sylvain Guillemette
Vincent Meesemaecker
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
PSA Automobiles SA
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Filing date
Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3994389A1 publication Critical patent/EP3994389A1/en
Application granted granted Critical
Publication of EP3994389B1 publication Critical patent/EP3994389B1/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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • 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
    • 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
    • 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
    • F21S41/28—Cover glass
    • 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
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • 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
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • 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
    • F21S43/249—Light guides with two or more light sources 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
    • F21S43/50—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
    • 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
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • the invention relates, in general, to light signaling devices, intended more particularly for motor vehicles, comprising a light signaling function which is carried out by diffusion of the light emitted by a light source via a light guide of the flat or other type of luminous element.
  • a light signaling device is arranged at the front or at the rear of a motor vehicle in order to signal the position of the vehicle to other road users.
  • the guide has either an opaline appearance, or optical microphones on the surface or in the material which reflect the light perpendicularly to the surface of the guide, which creates a so-called “light curtain” effect.
  • lighting elements are positioned behind a glass of fire as illustrated in figures 1, 2 And 3 .
  • a DIS signaling device comprising a housing BOI, open towards the front, corresponding to the exterior of the DIS device mounted on a vehicle, a transparent closing wall, designated by the term "glass" GLA in the remainder of the description , adapted to cooperate with said BOI box, a flat light guide ELU, adapted to be inserted into said BOI box and a plurality of light sources (not shown), adapted to be inserted into the BOI box, so as to inject light in the ELU flat light guide allowing light diffusion.
  • the flat light guide ELU is adapted to be inserted inside the housing DIS, upstream of the glass GLA, so as to maintain an empty space between said flat light guide ELU and said glass GLA.
  • Such an empty space designated JEF functional clearance, is necessary for the circulation of air in order to avoid any condensation inside the BOI case and particularly on the inside face of the crystal, since this condensation would be visible.
  • FIG. 2 And 3 illustrates rear light signaling devices of the state of the art, using a screen, or a curtain of light, as optical ELU element, arranged between the SOL light source and the GLA glass closing the BOI light box.
  • a screen or a curtain of light is said to be opaline (that is to say, not quite transparent and not quite opaque) and is capable of diffusing light over its entire apparent surface. This type of luminous element is then referred to as “diffusing optical elements”.
  • the glass GLA and the luminous element ELU constitute several parts which must be assembled with a constraint of positioning one relative to the other, which represents an additional cost compared to a single part.
  • the JEF offset between the outer surface of the glass GLA and the luminous element ELU can, in the case of a glass of complex shape, presenting a significant relief, generate a visual inconsistency between the two (visual distortions by refraction).
  • the invention therefore aims to overcome these drawbacks by proposing a luminous signaling device in which the glass and the luminous element form a single piece which, in addition to the reduction in cost, simplifies assembly and avoids visual inconsistencies. . Furthermore, the clearance currently necessary between glass and the luminous element, to avoid condensation, is eliminated.
  • the device is characterized in that the luminous element is overmoulded on a part of the glass to form a one-piece optical element: the part of the glass corresponding to the outer face of the one-piece optical element and the luminous element covering the inner face of the lens part, corresponding to the inner face of the one-piece optical element.
  • the one-piece optical element defines a hollow body obtained after bi-material injection molding: a first type of material constituting the part of the crystal and a second identical or different material, constituting the luminous element; said hollow body forming a protuberance towards the outside with respect to the rest of the glass wall closing the case.
  • the luminous element is split into two parts obtained from the same injection molding process of the same second type of material; each part of the luminous element defining the interior face of the hollow body with the exception of the bottom of the hollow body which defines an exit window for the light.
  • the light exit window supports a diffraction grating on its inner face.
  • the ice part has a general “U” shape, the first and second branches of which flare out starting from the bottom of the hollow body as far as the rest of the ice wall; the luminous element covering the inner face of the glass part also respectively having a general “U” shape, the first and second branches of which respectively cover the first and second branches of the glass part.
  • the ends of the first and second arms of the ice part are connected respectively to the rest of the ice wall having a substantially uniform surface, by substantially flat parts.
  • the interior surfaces of the substantially flat portions of the glass wall are covered with a third type of material opaque to light obtained from the same injection molding process and defining portions of glass opaque to light .
  • At least one light source is arranged to diffuse the light in the edges of the first and second branches of the luminous element used as a light guide or to illuminate the rear face(s) of the luminous element used as an opaline screen.
  • At least one light source is arranged opposite each slice of the first and second branches of the luminous element to illuminate each of the first and second branches of the luminous element and in which at least one third light source is arranged facing the light exit window of the glass part.
  • a second subject of the invention is a motor vehicle comprising at least one light signaling device as described above.
  • front arrangement will designate an arrangement oriented towards the outside of the signaling device when it is considered to be mounted on the vehicle.
  • outside and inside designate respectively arrangements of elements located towards the outside and towards the inside of the signaling device.
  • FIG 4 illustrates, in a sectional view in the XY plane of the XYZ reference frame, a detail of the assembly of a part of PGL glass and an ELU luminous element for a high relief GLA glass.
  • the profile of the PGL ice part forms a PRO protuberance which is imposed by the style.
  • the principle of the present invention consists in integrating the ELU luminous element into a part of the PGL glass without any play between the PGL glass part and the ELU luminous element, to avoid any visible condensation.
  • the luminous element ELU and the glass part PGL form a one-piece optical assembly EOM which is presented as one and the same piece.
  • the luminous element ELU is overmoulded on the inner surface of the glass part PGL as illustrated in figures 5 to 9 .
  • the ELU luminous element can be chosen from a layer of opaline material, or even a light guide, or light curtain, so that the juxtaposition of the chosen element, with the thickness of the PGL glass part, makes it possible to obtain the desired optical effect.
  • the one-piece optical element EOM is made by injecting a bi-material resin into a mold defining the shapes of the part of the glass PGL and of the luminous element ELU.
  • a first type of material is used for the ice part PGL and a second material, different or identical, is used for the ELU luminous element, for example a PMMA (Polymethyl methacrylate PMMA) which can be transparent, opaque or opaline, and PC (Polycarbonate).
  • PMMA Polymethyl methacrylate PMMA
  • PC Polycarbonate
  • the one-piece EOM optical element is made by injecting a tri-material resin into a mold defining the shapes of the PGL glass part, the ELU luminous element (opaline screen for example) and EGO opaque glass elements obtained from a third type of material, for example an opaque black PMMA.
  • the one-piece optical assembly EOM defines a hollow body COC whose outer and inner profile has a general "U" shape.
  • the first and second branches BR1 and BR2 of the "U” are substantially flared starting from the base of the "U” (corresponding to the bottom of the hollow body COC).
  • the ELU luminous element is molded inside the PGL lens part, completely matching the “U” shaped interior profile of the PGL lens part. It therefore also has a general flared "U" shape.
  • the glass part PGL and the luminous element ELU therefore respectively have first and second branches BG1, BG2 and BE1, BE2.
  • the first and second branches BG1 and BG2 of the glass part PGL are extended respectively by substantially planar parts PPL extending over the rest of the wall of the glass GLA, which is substantially uniform, closing the box BOI.
  • the first and second branches BE1 and BE2 of the luminous element ELU stop at the level of the flat parts PPL of the glass wall GLA.
  • a layer of material opaque to light is overmolded with the part of glass PGL and the luminous element ELU.
  • This opaque glass GLO is arranged at the base of the hollow body COC, on either side of the luminous element ELU, on the inner face of the flat parts PPG of the glass GLA.
  • the areas of opaque glass make it possible, on the one hand, to surround the transparent area(s) dedicated to the lighting function by avoiding light leaks, on the other hand to hide from the external view the other technical components of the signaling device.
  • the base of the hollow body COC corresponds to the rest of the glass GLA defining a substantially uniform wall which closes the front face of the case (not shown).
  • THE figures 7 to 9 respectively illustrate different arrangements of one or more SOL light sources with respect to the one-piece optical assembly EOM of the signaling device DIS according to the invention.
  • These light sources SOL make it possible to illuminate the luminous element ELU integrated into the glass part PGL.
  • FIG 7 illustrates a first “mixed” arrangement in which two light sources (a first and a second LED) SOL1 and SOL2 respectively illuminate the first and second branches BE1 and BE2 of the luminous element ELU.
  • the Anglo-Saxon acronym LED (or LEDs in the plural) for "Light-Emitting Diode” designates a light-emitting diode commonly used as a light source in motor vehicle lighting and/or signaling devices.
  • the first LED SOL1 is arranged opposite the edge of the first branch BE1 of the luminous element ELU.
  • the luminous flux is directly injected into the edge of the first branch BE1.
  • the ELU luminous element is used as a light guide.
  • the second LED SOL2 is arranged opposite a reflector REF of partially parabolic shape.
  • the luminous flux generated by the second LED SL2 is reflected by the reflector REF towards the rear of the luminous element ELU which is used as an opaline screen to diffuse the light over the entire external surface of the luminous element ELU.
  • This arrangement is called “mixed” because it combines edge lighting with lighting from the rear of the luminous element.
  • FIG 8 illustrates a second arrangement in which a single light source (an LED or a row of LEDs) SOL is arranged between the first and second branches BE1 and BE2 of the luminous element ELU.
  • This arrangement shows that the illumination of the ELU luminous element when it is used as an opaline screen, can be done by its rear face, and no longer by its edges when it is used as a light guide as explained above. in figure 7 .
  • a reflector REF or other optical element such as a section of light guide (not shown), can be arranged between the LED SOL and the first and second branches BE1 and BE2 of the luminous element ELU to confine the luminous flux towards the luminous element ELU.
  • FIG 9 illustrates a third arrangement in which the luminous element ELU is split into first and second parts ELU1 and ELU2, obtained by the same injection process and with the same second type of material.
  • the first and second luminous element parts ELU1 and ELU2 respectively marry the first and second branches BG1 and BG2 of the glass part PGL. They do not cover the base of the "U” of the glass part PGL (corresponding to the bottom of the hollow body COC), thus revealing a transparent glass part PGT defining an exit "window" for the light.
  • Two light sources (a first and a second LED) SOL1 and SOL2 are arranged respectively opposite the edges of the branches BE1 and BE2 of the first and second parts of the luminous element ELU1 and ELU2.
  • the light fluxes generated by the first and second LEDs SOL1 and SOL2 are injected directly into the edges of the first and second branches.
  • a third light source (third LED) SOL3 is arranged between the first and second LEDs, SOL1 and SOL2, facing the window PGT.
  • This arrangement makes it possible to obtain simultaneously or independently, a stop light function and a night signaling light function.
  • the luminous flux generated by the third central LED SOL3 directly crosses the part of the PGL lens to perform the brake light function which requires more luminous flux than a function signaling at night.
  • the inner surface of the window PCT, opposite the third LED SOL3, may comprise a diffraction grating RED obtained during the molding of the part of the crystal, PGL defining for example a plurality of optical prisms.
  • the hollow body COC of the monobloc optical assembly EOM can be likened to a protrusion PRO presenting a significant relief compared to the rest of the wall of the glass GLA.
  • hollow bodies COC or protrusions PRO can be arranged in parallel for example along Y, and preferably, three protrusions PRO to define a light signature specific to a car manufacturer.

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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)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Description

L'invention concerne, de façon générale, les dispositifs de signalisation lumineuse, destinés plus particulièrement aux véhicules automobiles, comprenant une fonction de signalisation lumineuse qui est réalisée par diffusion de la lumière émise par une source lumineuse via un guide de lumière de type plat ou autre type d'élément lumineux.The invention relates, in general, to light signaling devices, intended more particularly for motor vehicles, comprising a light signaling function which is carried out by diffusion of the light emitted by a light source via a light guide of the flat or other type of luminous element.

De manière connue, un dispositif de signalisation lumineuse est disposé à l'avant ou à l'arrière d'un véhicule automobile afin de signaliser la position du véhicule aux autres usagers de la route.In known manner, a light signaling device is arranged at the front or at the rear of a motor vehicle in order to signal the position of the vehicle to other road users.

Selon l'état de la technique, on connait des dispositifs de signalisation pour feux arrière ou avant de véhicule utilisant des écrans opalins, des guides ou des rideaux de lumière pour créer des signatures lumineuses propre à chaque constructeur. La demande de brevet DE102006036033 A1 présente par exemple un dispositif d'éclairage pour véhicule automobile avec un guide de lumière présentant un effet de profondeur. On désigne par rideau de lumière un guide de lumière plutôt mince qu'on utilise pour diffuser la lumière par sa plus grande surface (et non par un côté ou une tranche).According to the state of the art, there are known signaling devices for rear or front lights of vehicles using opaline screens, guides or curtains of light to create light signatures specific to each manufacturer. The patent application DE102006036033 A1 presents for example a lighting device for a motor vehicle with a light guide having a depth effect. A light curtain is a rather thin light guide that is used to diffuse the light by its largest surface (and not by a side or an edge).

Pour cela, le guide possède soit un aspect opalin, soit des micros optiques en surface ou dans la matière qui renvoient la lumière perpendiculairement à la surface du guide, ce qui crée un effet dit de « rideau de lumière ».For this, the guide has either an opaline appearance, or optical microphones on the surface or in the material which reflect the light perpendicularly to the surface of the guide, which creates a so-called “light curtain” effect.

Ces différents éléments, désignés par « éléments lumineux » sont positionnés derrière une glace de feu comme illustrée aux figures 1, 2 et 3.These various elements, referred to as "lighting elements" are positioned behind a glass of fire as illustrated in figures 1, 2 And 3 .

Ainsi, on connait notamment du document FR3055264 , tel qu'illustré à la figure 1, un dispositif de signalisation DIS comportant un boîtier BOI, ouvert vers l'avant, correspondant à l'extérieur du dispositif DIS monté sur un véhicule, une paroi de fermeture transparente, désignée par le terme « glace » GLA dans la suite de la description, adaptée pour coopérer avec ledit boîtier BOI, un guide de lumière plat ELU, adapté pour s'insérer dans ledit boîtier BOI et une pluralité de sources lumineuses (non représentées), adaptées pour s'insérer dans le boîtier BOI, de façon à injecter de la lumière dans le guide de lumière plat ELU permettant la diffusion de la lumière.Thus, we know in particular from the document FR3055264 , as shown in figure 1 , a DIS signaling device comprising a housing BOI, open towards the front, corresponding to the exterior of the DIS device mounted on a vehicle, a transparent closing wall, designated by the term "glass" GLA in the remainder of the description , adapted to cooperate with said BOI box, a flat light guide ELU, adapted to be inserted into said BOI box and a plurality of light sources (not shown), adapted to be inserted into the BOI box, so as to inject light in the ELU flat light guide allowing light diffusion.

Le guide de lumière plat ELU est adapté pour s'insérer à l'intérieur du boîtier DIS, en amont de la glace GLA, de manière à conserver un espace vide entre ledit guide de lumière plat ELU et ladite glace GLA. Un tel espace vide, désigné jeu fonctionnel JEF, est nécessaire à la circulation de l'air afin d'éviter toute condensation à l'intérieur du boîtier BOI et particulièrement sur la face intérieure de la glace, car cette condensation serait visible.The flat light guide ELU is adapted to be inserted inside the housing DIS, upstream of the glass GLA, so as to maintain an empty space between said flat light guide ELU and said glass GLA. Such an empty space, designated JEF functional clearance, is necessary for the circulation of air in order to avoid any condensation inside the BOI case and particularly on the inside face of the crystal, since this condensation would be visible.

Les figures 2 et 3 illustre des dispositifs de signalisation de feux arrière de l'état de l'art, utilisant un écran, ou un rideau de lumière, comme élément optique ELU, disposés entre la source de lumière SOL et la glace GLA fermant le boitier du feu BOI. Un écran ou un rideau de lumière sont dits opalins (c'est-à-dire, pas tout à fait transparent et pas tout à fait opaque) et sont aptes à diffuser la lumière sur toute leur surface apparente. On désigne alors ce type d'élément lumineux par « éléments optiques diffusant ».THE figure 2 And 3 illustrates rear light signaling devices of the state of the art, using a screen, or a curtain of light, as optical ELU element, arranged between the SOL light source and the GLA glass closing the BOI light box. A screen or a curtain of light is said to be opaline (that is to say, not quite transparent and not quite opaque) and is capable of diffusing light over its entire apparent surface. This type of luminous element is then referred to as “diffusing optical elements”.

La glace GLA et l'élément lumineux ELU constituent plusieurs pièces qu'il faut assembler avec une contrainte de positionnement de l'une par rapport à l'autre, ce qui représente un coût supplémentaire par rapport à une pièce unique.The glass GLA and the luminous element ELU constitute several parts which must be assembled with a constraint of positioning one relative to the other, which represents an additional cost compared to a single part.

D'autre part, le décalage JEF entre la surface extérieure de la glace GLA et l'élément lumineux ELU peut, dans le cas d'une glace de forme complexe, présentant un relief important, générer une incohérence visuelle entre les deux (déformations visuelles par réfraction).On the other hand, the JEF offset between the outer surface of the glass GLA and the luminous element ELU can, in the case of a glass of complex shape, presenting a significant relief, generate a visual inconsistency between the two (visual distortions by refraction).

Enfin, avec le souhait du style d'avoir des glaces présentant un relief important et une signature visuelle qui répondent aux mêmes attentes qu'avec des glaces présentant un faible relief, l'espace nécessaire entre la glace et l'élément lumineux devient très problématique, voire impossible à obtenir sans dégradation de l'assemblage et de l'effet esthétique recherché.Finally, with the desire of the style to have crystals with significant relief and a visual signature that meet the same expectations as with crystals with low relief, the space required between the crystal and the luminous element becomes very problematic. , even impossible to obtain without degradation of the assembly and of the desired aesthetic effect.

L'invention vise donc à pallier ces inconvénients en proposant un dispositif de signalisation lumineuse dans lequel la glace et l'élément lumineux ne forment qu'une seule pièce ce qui, outre la réduction de coût, simplifie l'assemblage et évite les incohérences visuelles. Par ailleurs, le jeu actuellement nécessaire entre glace et l'élément lumineux, pour éviter la condensation, est supprimé.The invention therefore aims to overcome these drawbacks by proposing a luminous signaling device in which the glass and the luminous element form a single piece which, in addition to the reduction in cost, simplifies assembly and avoids visual inconsistencies. . Furthermore, the clearance currently necessary between glass and the luminous element, to avoid condensation, is eliminated.

De ce fait, il ne peut plus y avoir de condensation entre glace et l'élément lumineux et le profil extérieur de la glace peut accepter des reliefs importants sans dégradation de l'effet visuel donc esthétique.As a result, there can no longer be any condensation between the glass and the luminous element and the external profile of the glass can accept significant reliefs without degradation of the visual and therefore aesthetic effect.

Plus précisément, pour parvenir à ce résultat, la présente invention propose un dispositif de signalisation lumineuse pour véhicule, en particulier pour véhicule automobile, ledit dispositif comprenant :

  • un boîtier ouvert à l'avant, c'est-à-dire vers l'extérieur lorsque le dispositif est monté sur un véhicule,
  • au moins une source lumineuse disposée à l'intérieur du boîtier,
  • une glace correspondant à une paroi adaptée pour fermer le boîtier, et
  • au moins un élément lumineux adapté pour diffuser de la lumière issue de ladite source lumineuse.
More specifically, to achieve this result, the present invention proposes a light signaling device for a vehicle, in particular for a motor vehicle, said device comprising:
  • a box open at the front, that is to say towards the outside when the device is mounted on a vehicle,
  • at least one light source arranged inside the housing,
  • a lens corresponding to a wall adapted to close the case, and
  • at least one light element suitable for diffusing light from said light source.

Le dispositif est caractérisé en ce que l'élément lumineux est surmoulée sur une partie de la glace pour former un élément optique monobloc : la partie de glace correspondant à la face extérieure de l'élément optique monobloc et l'élément lumineux recouvrant la face intérieure de la partie de glace, correspondant à la face intérieure de l'élément optique monobloc.The device is characterized in that the luminous element is overmoulded on a part of the glass to form a one-piece optical element: the part of the glass corresponding to the outer face of the one-piece optical element and the luminous element covering the inner face of the lens part, corresponding to the inner face of the one-piece optical element.

Selon l'invention, l'élément optique monobloc définit un corps creux obtenu après moulage par injection bi-matière : un premier type de matière constituant la partie de glace et une deuxième matière identique ou différente, constituant l'élément lumineux ; ledit corps creux formant une protubérance vers l'extérieur par rapport au reste de la paroi de glace fermant le boitier.According to the invention, the one-piece optical element defines a hollow body obtained after bi-material injection molding: a first type of material constituting the part of the crystal and a second identical or different material, constituting the luminous element; said hollow body forming a protuberance towards the outside with respect to the rest of the glass wall closing the case.

Selon l'invention, l'élément lumineux est scindé en deux parties obtenues à partir du même procédé de moulage par injection du même deuxième type de matériau ; chaque partie de l'élément lumineux définissant la face intérieure du corps creux à l'exception du fond du corps creux qui définit une fenêtre de sortie pour la lumière.According to the invention, the luminous element is split into two parts obtained from the same injection molding process of the same second type of material; each part of the luminous element defining the interior face of the hollow body with the exception of the bottom of the hollow body which defines an exit window for the light.

Selon une caractéristique, la fenêtre de sortie de lumière supporte un réseau de diffraction sur sa face intérieure.According to one characteristic, the light exit window supports a diffraction grating on its inner face.

Selon une autre caractéristique, la partie de glace a une forme générale de « U » dont les premières et deuxièmes branches s'évasent en partant du fond du corps creux jusqu'au reste de la paroi de glace ; l'élément lumineux recouvrant la face intérieure de la partie de glace présentant également respectivement une forme générale de « U » dont les premières et deuxièmes branches recouvrent respectivement les première et deuxième branches de la partie de glace.According to another characteristic, the ice part has a general “U” shape, the first and second branches of which flare out starting from the bottom of the hollow body as far as the rest of the ice wall; the luminous element covering the inner face of the glass part also respectively having a general “U” shape, the first and second branches of which respectively cover the first and second branches of the glass part.

Selon une autre caractéristique, les extrémités des première et deuxième branches la partie de glace se raccordent respectivement au reste de la paroi de glace présentant une surface sensiblement uniforme, par des parties sensiblement planes.According to another characteristic, the ends of the first and second arms of the ice part are connected respectively to the rest of the ice wall having a substantially uniform surface, by substantially flat parts.

Selon une autre caractéristique, les surfaces intérieures des parties sensiblement planes de la paroi de glace sont recouvertes d'un troisième type de matériau opaque à la lumière obtenue à partir du même procédé de moulage par injection et définissant des parties de glace opaque à la lumière.According to another feature, the interior surfaces of the substantially flat portions of the glass wall are covered with a third type of material opaque to light obtained from the same injection molding process and defining portions of glass opaque to light .

Selon une autre caractéristique, au moins une source de lumière est agencée pour diffuser la lumière dans les tranches des première et deuxième branches de l'élément lumineux utilisé en tant que guide de lumière ou pour éclairer la ou les faces arrières de l'élément lumineux utilisé en tant qu'écran opalin.According to another characteristic, at least one light source is arranged to diffuse the light in the edges of the first and second branches of the luminous element used as a light guide or to illuminate the rear face(s) of the luminous element used as an opaline screen.

Selon une autre caractéristique, au moins une source de lumière est agencée en regard de chaque tranche des première et deuxième branches de l'élément lumineux pour éclairer chacune des première et deuxième branches de l'élément lumineux et dans lequel au moins une troisième source lumineuse est agencée en regard de la fenêtre de sortie de lumière de la partie de glace.According to another characteristic, at least one light source is arranged opposite each slice of the first and second branches of the luminous element to illuminate each of the first and second branches of the luminous element and in which at least one third light source is arranged facing the light exit window of the glass part.

L'invention a pour deuxième objet, un véhicule automobile comprenant au moins un dispositif de signalisation lumineuse tel que décrit ci-dessus.A second subject of the invention is a motor vehicle comprising at least one light signaling device as described above.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée des modes de réalisation donnés à titre d'exemple uniquement, et en référence aux dessins qui montrent :

  • [Fig. 1] la figure 1, déjà décrite, un schéma d'un dispositif d'éclairage et/ou de signalisation lumineuse selon l'art antérieur ;
  • [Fig. 2] la figure 2, déjà décrite, un deuxième dispositif de signalisation selon l'art antérieur ;
  • [Fig. 3] la figure 3, déjà décrite, un troisième dispositif de signalisation selon l'art antérieur ;
  • [Fig. 4] la figure 4, une vue en coupe selon le plan XY d'un élément optique d'un dispositif de signalisation, montrant l'impact du jeu fonctionnel JEF sur une glace présentant un relief important.
  • [Fig. 5] la figure 5, une vue en coupe selon le plan XY d'un premier mode de réalisation d'un élément optique monobloc d'un dispositif de signalisation lumineuse qui ne fait pas partie de l'invention ;
  • [Fig. 6] la figure 6, une vue en coupe selon le plan XY d'un deuxième mode de réalisation d'un élément optique monobloc d'un dispositif de signalisation lumineuse qui ne fait pas partie de l'invention
  • [Fig. 7] la figure 7, une vue en coupe selon le plan XY d'un premier agencement de source(s) lumineuse(s) et d'un élément optique monobloc d'un dispositif de signalisation lumineuse qui ne fait pas partie de l'invention ;
  • [Fig. 8] la figure 8, une vue en coupe selon le plan XY d'un deuxième agencement de source(s) lumineuse(s) et d'un élément optique monobloc d'un dispositif de signalisation lumineuse qui ne fait pas partie de l'invention ; et
  • [Fig. 9] la figure 9, une vue en coupe selon le plan XY d'un troisième agencement de source(s) lumineuse(s) et d'un élément optique monobloc d'un dispositif de signalisation lumineuse selon l'invention.
Other characteristics and advantages of the invention will appear on reading the detailed description of the embodiments given by way of example only, and with reference to the drawings which show:
  • [ Fig. 1 ] there figure 1 , already described, a diagram of a lighting and/or light signaling device according to the prior art;
  • [ Fig. 2 ] there picture 2 , already described, a second signaling device according to the prior art;
  • [ Fig. 3 ] there picture 3 , already described, a third signaling device according to the prior art;
  • [ Fig. 4 ] there figure 4 , a sectional view along the XY plane of an optical element of a signaling device, showing the impact of the JEF functional clearance on a crystal having a significant relief.
  • [ Fig. 5 ] there figure 5 , a view in section along the XY plane of a first embodiment of a one-piece optical element of a light signaling device which does not form part of the invention;
  • [ Fig. 6 ] there figure 6 , a sectional view along the XY plane of a second embodiment of a one-piece optical element of a light signaling device which does not form part of the invention
  • [ Fig. 7 ] there figure 7 , a view in section along the XY plane of a first arrangement of light source(s) and of a one-piece optical element of a light signaling device which does not form part of the invention;
  • [ Fig. 8 ] there figure 8 , a view in section along the XY plane of a second arrangement of light source(s) and of a one-piece optical element of a light signaling device which is not part of the invention; And
  • [ Fig. 9 ] there figure 9 , a view in section along the XY plane of a third arrangement of light source(s) and of a one-piece optical element of a light signaling device according to the invention.

Les dessins des figures sont orientés suivant un référentiel XYZ généralement utilisé pour représenter un véhicule automobile dans l'espace.The drawings of the figures are oriented according to an XYZ reference frame generally used to represent a motor vehicle in space.

Par convention, on désignera par disposition « avant », une disposition orientée vers l'extérieur du dispositif de signalisation lorsqu'il est considéré monté sur le véhicule.By convention, the term "front" arrangement will designate an arrangement oriented towards the outside of the signaling device when it is considered to be mounted on the vehicle.

De la même manière, les termes « extérieur » et « intérieur » désignent respectivement des dispositions d'éléments se situant vers l'extérieur et vers l'intérieur du dispositif de signalisation.In the same way, the terms “outside” and “inside” designate respectively arrangements of elements located towards the outside and towards the inside of the signaling device.

Sur les différentes figures, les éléments identiques ou similaires, sont référencés avec les mêmes repères.In the various figures, identical or similar elements are referenced with the same references.

La figure 4 illustre suivant une vue en coupe dans le plan XY du référentiel XYZ, un détail de l'assemblage d'une partie de glace PGL et d'un l'élément lumineux ELU pour une glace GLA à fort relief. Le profil de la partie de glace PGL forme une protubérance PRO qui est imposée par le style.There figure 4 illustrates, in a sectional view in the XY plane of the XYZ reference frame, a detail of the assembly of a part of PGL glass and an ELU luminous element for a high relief GLA glass. The profile of the PGL ice part forms a PRO protuberance which is imposed by the style.

Sur cette figure, on observe que le jeu nécessaire JEF (suivant Y) entre l'élément lumineux ELU et la partie de glace PGL impose à la fois une réduction de la largeur RDR de l'élément lumineux ELU (suivant Y) et un décalage DER (suivant X) résultant important entre l'extrémité libre de l'élément lumineux ELU et le fond de la partie de glace PGL. Dans le cas d'une glace GLA de forme simple (avec peu de relief), ce jeu crée déjà quelques effets esthétiques indésirables, comme une vision moins nette des éléments internes, ainsi qu'une difficulté pour atteindre les angles de visibilité réglementaires.In this figure, it can be seen that the necessary clearance JEF (along Y) between the luminous element ELU and the part of the glass PGL imposes both a reduction in the width RDR of the luminous element ELU (along Y) and an offset DER (along X) significant result between the free end of the luminous element ELU and the bottom of the glass part PGL. In the case of a simple-shaped GLA window (with little relief), this clearance already creates some undesirable aesthetic effects, such as a less clear view of the internal elements, as well as difficulty in reaching the regulation visibility angles.

Ces effets indésirables sont accentués avec une glace GLA de forme complexe présentant des reliefs important (protubérances) : différence de forme entre la glace extérieure et les éléments internes (lumineux) et donc perception altérée de la signature visuelle, déformation visuelle des éléments internes au travers des surfaces rayonnées de la glace (phénomènes de réfractions).These undesirable effects are accentuated with a complex-shaped GLA lens with significant relief (protuberances): difference in shape between the outer lens and the internal elements (light) and therefore altered perception of the visual signature, visual distortion of the internal elements through radiated surfaces of the ice (phenomena of refractions).

Le principe de la présente invention consiste à intégrer l'élément lumineux ELU à une partie de la glace PGL sans aucun jeu entre la partie de glace PGL et l'élément lumineux ELU, pour éviter toute condensation visible.The principle of the present invention consists in integrating the ELU luminous element into a part of the PGL glass without any play between the PGL glass part and the ELU luminous element, to avoid any visible condensation.

Ainsi l'élément lumineux ELU et la partie de glace PGL forment un ensemble optique monobloc EOM qui se présente comme une seule et même pièce.Thus the luminous element ELU and the glass part PGL form a one-piece optical assembly EOM which is presented as one and the same piece.

Pour cela, selon l'invention, l'élément lumineux ELU est surmoulé sur la surface intérieure de la partie de glace PGL comme illustrée aux figures 5 à 9.For this, according to the invention, the luminous element ELU is overmoulded on the inner surface of the glass part PGL as illustrated in figures 5 to 9 .

L'élément lumineux ELU peut être choisi parmi une couche de matériau opalin, voire un guide de lumière, ou rideau de lumière, afin que la juxtaposition de l'élément choisi, avec l'épaisseur de la partie de glace PGL permette d'obtenir l'effet optique désiré.The ELU luminous element can be chosen from a layer of opaline material, or even a light guide, or light curtain, so that the juxtaposition of the chosen element, with the thickness of the PGL glass part, makes it possible to obtain the desired optical effect.

Dans un premier mode de réalisation, décrit en référence à la figure 5, l'élément optique monobloc EOM est réalisé par injection d'une résine bi matière dans un moule définissant les formes de la partie de glace PGL et de l'élément lumineux ELU. Un premier type de matériau est utilisé pour la partie de glace PGL et un deuxième matériau, différent ou identique, est utilisé pour l'élément lumineux ELU par exemple un PMMA (Polyméthacrylate de méthyle PMMA) qui peut être transparent, opaque ou opalin, et du PC (Polycarbonate).In a first embodiment, described with reference to the figure 5 , the one-piece optical element EOM is made by injecting a bi-material resin into a mold defining the shapes of the part of the glass PGL and of the luminous element ELU. A first type of material is used for the ice part PGL and a second material, different or identical, is used for the ELU luminous element, for example a PMMA (Polymethyl methacrylate PMMA) which can be transparent, opaque or opaline, and PC (Polycarbonate).

Dans un deuxième mode de réalisation, décrit en référence à la figure 6, l'élément optique monobloc EOM est réalisé par injection d'une résine tri matière dans un moule définissant les formes de la partie de glace PGL, de l'élément lumineux ELU (écran opalin par exemple) et d'éléments de glace opaque EGO obtenues à partir d'un troisième type de matériau par exemple un PMMA noir opaque.In a second embodiment, described with reference to the figure 6 , the one-piece EOM optical element is made by injecting a tri-material resin into a mold defining the shapes of the PGL glass part, the ELU luminous element (opaline screen for example) and EGO opaque glass elements obtained from a third type of material, for example an opaque black PMMA.

Dans les premier et deuxième modes de réalisation illustrés aux figures 5 et 6, l'ensemble optique monobloc EOM définit un corps creux COC dont le profil extérieur et intérieur a une forme générale en « U ». Les première et deuxième branches BR1 et BR2 du « U » sont sensiblement évasées en partant de la base du « U » (correspondant au fond du corps creux COC).In the first and second embodiments illustrated in figures 5 and 6 , the one-piece optical assembly EOM defines a hollow body COC whose outer and inner profile has a general "U" shape. The first and second branches BR1 and BR2 of the "U" are substantially flared starting from the base of the "U" (corresponding to the bottom of the hollow body COC).

L'élément lumineux ELU est surmoulé à l'intérieur de la partie de glace PGL en épousant complètement le profil intérieur en « U » de la partie de glace PGL. Il a donc également une forme générale en « U » évasé. La partie de glace PGL et l'élément lumineux ELU présentent donc respectivement des première et deuxième branches BG1, BG2 et BE1, BE2.The ELU luminous element is molded inside the PGL lens part, completely matching the “U” shaped interior profile of the PGL lens part. It therefore also has a general flared "U" shape. The glass part PGL and the luminous element ELU therefore respectively have first and second branches BG1, BG2 and BE1, BE2.

Les première et deuxième branches BG1 et BG2 de la partie de glace PGL se prolongent respectivement par des parties sensiblement planes PPL s'étendant sur le reste de la paroi de la glace GLA, sensiblement uniforme, fermant le boitier BOI.The first and second branches BG1 and BG2 of the glass part PGL are extended respectively by substantially planar parts PPL extending over the rest of the wall of the glass GLA, which is substantially uniform, closing the box BOI.

Les première et deuxième branches BE1 et BE2 de l'élément lumineux ELU s'arrêtent au niveau des parties planes PPL de la paroi de glace GLA.The first and second branches BE1 and BE2 of the luminous element ELU stop at the level of the flat parts PPL of the glass wall GLA.

En se référant plus particulièrement à la figure 6, une couche de matériau opaque à la lumière (glace opaque GLO) est surmoulée avec la partie de glace PGL et l'élément lumineux ELU. Cette glace opaque GLO est agencée à la base du corps creux COC, de part et d'autre de l'élément lumineux ELU, sur la face intérieure des parties planes PPG de la glace GLA. Les zones de glace opaque permettent, d'une part d'entourer la (ou les) zone(s) transparente(s) dédiée(s) à la fonction lumineuse en évitant les fuites de lumière, d'autre part à cacher de la vue extérieure les autres éléments techniques constitutifs du dispositif de signalisation. La base du corps creux COC correspond au reste de la glace GLA définissant une paroi sensiblement uniforme qui ferme la face avant du boitier (non représenté).With particular reference to the figure 6 , a layer of material opaque to light (opaque glass GLO) is overmolded with the part of glass PGL and the luminous element ELU. This opaque glass GLO is arranged at the base of the hollow body COC, on either side of the luminous element ELU, on the inner face of the flat parts PPG of the glass GLA. The areas of opaque glass make it possible, on the one hand, to surround the transparent area(s) dedicated to the lighting function by avoiding light leaks, on the other hand to hide from the external view the other technical components of the signaling device. The base of the hollow body COC corresponds to the rest of the glass GLA defining a substantially uniform wall which closes the front face of the case (not shown).

Partant du mode de réalisation de la figure 6, les figures 7 à 9 illustrent respectivement différents agencements d'une ou de plusieurs sources lumineuses SOL par rapport à l'ensemble optique monobloc EOM du dispositif de signalisation DIS selon l'invention. Ces sources de lumière SOL permettent d'éclairer l'élément lumineux ELU intégré à la partie de glace PGL.Starting from the embodiment of the figure 6 , THE figures 7 to 9 respectively illustrate different arrangements of one or more SOL light sources with respect to the one-piece optical assembly EOM of the signaling device DIS according to the invention. These light sources SOL make it possible to illuminate the luminous element ELU integrated into the glass part PGL.

La figure 7 illustre un premier agencement « mixte » dans lequel deux sources de lumière (une première et une deuxième LEDs) SOL1 et SOL2 éclairent respectivement les premières et deuxièmes branches BE1 et BE2 de l'élément lumineux ELU. L'acronyme anglo-saxon LED (ou LEDs au pluriel) pour « Light-Emitting Diode », désigne une diode électroluminescente couramment utilisée comme source de lumière dans les dispositifs d'éclairage et/ou de signalisation de véhicule automobile.There figure 7 illustrates a first “mixed” arrangement in which two light sources (a first and a second LED) SOL1 and SOL2 respectively illuminate the first and second branches BE1 and BE2 of the luminous element ELU. The Anglo-Saxon acronym LED (or LEDs in the plural) for "Light-Emitting Diode" designates a light-emitting diode commonly used as a light source in motor vehicle lighting and/or signaling devices.

La première LED SOL1 est agencée en regard de la tranche de la première branche BE1 de l'élément lumineux ELU. Le flux lumineux est directement injecté dans la tranche de la première branche BE1. L'élément lumineux ELU est utilisé en tant que guide de lumière. La deuxième LED SOL2 est agencée en regard d'un réflecteur REF de forme partiellement parabolique. Le flux lumineux généré par la deuxième LED SL2 est réfléchi par le réflecteur REF vers l'arrière de l'élément lumineux ELU qui est utilisé comme écran opalin pour diffuser la lumière sur toute la surface extérieure de l'élément lumineux ELU. Cet agencement est dit « mixte » car il combine un éclairage par la tranche avec un éclairage par l'arrière de l'élément lumineux.The first LED SOL1 is arranged opposite the edge of the first branch BE1 of the luminous element ELU. The luminous flux is directly injected into the edge of the first branch BE1. The ELU luminous element is used as a light guide. The second LED SOL2 is arranged opposite a reflector REF of partially parabolic shape. The luminous flux generated by the second LED SL2 is reflected by the reflector REF towards the rear of the luminous element ELU which is used as an opaline screen to diffuse the light over the entire external surface of the luminous element ELU. This arrangement is called “mixed” because it combines edge lighting with lighting from the rear of the luminous element.

La figure 8 illustre un deuxième agencement dans lequel une seule source de lumière (une LED ou une rangée de LEDs) SOL est agencée entre les première et deuxième branches BE1 et BE2 de l'élément lumineux ELU. Cet agencement montre que l'éclairement de l'élément lumineux ELU lorsque celui-ci est utilisé comme un écran opalin, peut se faire par sa face arrière, et non plus par ses tranches lorsqu'il est utilisé en guide de lumière comme expliqué précédemment en figure 7. Un réflecteur REF ou autre élément optique tel qu'un tronçon de guide de lumière (non représenté), peuvent être agencés entre la LED SOL et les première et deuxième branches BE1 et BE2 de l'élément lumineux ELU pour confiner le flux lumineux vers l'élément lumineux ELU.There figure 8 illustrates a second arrangement in which a single light source (an LED or a row of LEDs) SOL is arranged between the first and second branches BE1 and BE2 of the luminous element ELU. This arrangement shows that the illumination of the ELU luminous element when it is used as an opaline screen, can be done by its rear face, and no longer by its edges when it is used as a light guide as explained above. in figure 7 . A reflector REF or other optical element such as a section of light guide (not shown), can be arranged between the LED SOL and the first and second branches BE1 and BE2 of the luminous element ELU to confine the luminous flux towards the luminous element ELU.

Enfin, la figure 9 illustre un troisième agencement dans lequel l'élément lumineux ELU est scindé en des première et deuxième parties ELU1 et ELU2, obtenues par le même procédé d'injection et avec le même deuxième type de matériau.Finally, the figure 9 illustrates a third arrangement in which the luminous element ELU is split into first and second parts ELU1 and ELU2, obtained by the same injection process and with the same second type of material.

Les première et deuxième parties d'élément lumineux ELU1 et ELU2 épousent respectivement les première et deuxième branches BG1 et BG2 de la partie de glace PGL. Ils ne recouvrent pas la base du « U » de la partie de glace PGL (correspondant au fond du corps creux COC), laissant ainsi apparaitre une partie de glace transparente PGT définissant une « fenêtre » de sortie pour la lumière.The first and second luminous element parts ELU1 and ELU2 respectively marry the first and second branches BG1 and BG2 of the glass part PGL. They do not cover the base of the "U" of the glass part PGL (corresponding to the bottom of the hollow body COC), thus revealing a transparent glass part PGT defining an exit "window" for the light.

Deux sources de lumière (une première et une deuxième LEDs) SOL1 et SOL2 sont agencées respectivement en regard des tranches des branches BE1 et BE2 des première et deuxième parties de l'élément lumineux ELU1 et ELU2. Les flux lumineux générés par les première et deuxième LEDs SOL1 et SOL2 sont injectés directement dans les tranches des première et deuxième branches.Two light sources (a first and a second LED) SOL1 and SOL2 are arranged respectively opposite the edges of the branches BE1 and BE2 of the first and second parts of the luminous element ELU1 and ELU2. The light fluxes generated by the first and second LEDs SOL1 and SOL2 are injected directly into the edges of the first and second branches.

Une troisième source de lumière (troisième LED) SOL3 est agencée entre les première et deuxième LEDs, SOL1 et SOL2, en regard de la fenêtre PGT.A third light source (third LED) SOL3 is arranged between the first and second LEDs, SOL1 and SOL2, facing the window PGT.

Cet agencement permet d'obtenir simultanément ou de façon indépendante, une fonction de feux stop et une fonction de feu de signalisation de nuit.This arrangement makes it possible to obtain simultaneously or independently, a stop light function and a night signaling light function.

Grâce à la « fenêtre » PGT laissée dans le fond du corps creux COC, le flux lumineux généré par la troisième LED centrale SOL3, traverse directement la partie de glace PGL pour réaliser la fonction feu stop qui nécessite plus de flux lumineux qu'une fonction de signalisation de nuit.Thanks to the PGT "window" left in the bottom of the hollow body COC, the luminous flux generated by the third central LED SOL3 directly crosses the part of the PGL lens to perform the brake light function which requires more luminous flux than a function signaling at night.

La surface intérieure de la fenêtre PCT, en regard de la troisième LED SOL3, peut comporter un réseau de diffraction RED obtenu lors du moulage de la partie de glace, PGL définissant par exemple une pluralité de prismes optiques.The inner surface of the window PCT, opposite the third LED SOL3, may comprise a diffraction grating RED obtained during the molding of the part of the crystal, PGL defining for example a plurality of optical prisms.

Le corps creux COC de l'ensemble optique monobloc EOM peut s'assimiler à une protubérance PRO présentant un relief important par rapport au reste de la paroi de la glace GLA.The hollow body COC of the monobloc optical assembly EOM can be likened to a protrusion PRO presenting a significant relief compared to the rest of the wall of the glass GLA.

Plusieurs corps creux COC ou protubérances PRO peuvent être agencés en parallèle par exemple suivant Y, et de préférence, trois protubérances PRO pour définir une signature lumineuse spécifique à un constructeur automobile.Several hollow bodies COC or protrusions PRO can be arranged in parallel for example along Y, and preferably, three protrusions PRO to define a light signature specific to a car manufacturer.

En synthèse, les bénéfices technique, économique et esthétique apportés par la présente invention sont :

  • Suppression du risque de condensation visible tout en en s'affranchissant du jeu nécessaire à la circulation d'air entre la glace et l'élément lumineux.
  • Visibilité de l'élément lumineux aux angles requis par la réglementation.
  • Réduction du nombre de pièces.
  • Cohérence des formes extérieures de glace avec les élément(s) intérieur(s) lumineux.
  • Suppression des déformations visuelles (par réfraction) des éléments internes lumineux.
In summary, the technical, economic and aesthetic benefits provided by the present invention are:
  • Elimination of the risk of visible condensation while eliminating the clearance necessary for the circulation of air between the lens and the luminous element.
  • Visibility of the luminous element at the angles required by the regulations.
  • Reduced number of parts.
  • Consistency of the external ice shapes with the luminous interior element(s).
  • Elimination of visual distortions (by refraction) of the internal luminous elements.

Claims (8)

  1. Light signaling device (DIS) for a vehicle, in particular for a motor vehicle, said device (DIS) comprising:
    - a box (BOI) open at the front, i.e. towards the outside when the device (DIS) is mounted on a vehicle,
    - at least one light source (SOL) arranged inside the box (BOI),
    - a glass (GLA) corresponding to a wall adapted to close the box (BOI), and
    - at least one light element (ELU) suitable for diffusing light from said light source (SOL),
    characterized in that the luminous element (ELU) is overmoulded on a part of the lens (PGL) to form a one-piece optical element (EOM), the part of the lens (PGL) corresponding to the outer face of the one-piece optical element (EOM) and the luminous element (ELU) covering the inner face of the lens part (PGL), corresponding to the inner face of the one-piece optical element (EOM),
    in that the one-piece optical element (EOM) defines a hollow body (COC) obtained after bi-material injection molding with a first type of material constituting the glass part (PGL) and a second identical or different material, constituting the luminous element (ELU); said hollow body (COC) forming a protuberance (PRO) towards the outside relative to the rest of the glass wall (GLA) closing the case (BOI),
    and in that the luminous element (ELU) is split into two parts obtained (ELU1, ELU2) from the same injection molding process of the same second type of material; each part of the luminous element (ELU1, ELU2) defining the inner face of the hollow body (COC) with the exception of the bottom of the hollow body (COC) which defines an exit window for the light (PGT).
  2. Device (DIS) according to the preceding claim, characterized in that the light exit window (PGT) supports a diffraction grating (RED) on its inner face.
  3. Device (DIS) according to one of claims 1 to 2, wherein the ice part (PGL) has the general shape of a "U" whose first and second branches (BG1 and BG2) flare out starting from the bottom of the hollow body (COC) to the rest of the ice wall (GLA); the luminous element (ELU) covering the inner face of the glass part (PGL) also having respectively a general "U" shape, the first and second branches (BE1, BE2) respectively covering the first and second branches (BG1, BG2) of the ice part (PGL).
  4. Device (DIS) according to the preceding claim, in which the ends of the first and second branches (BG1 and BG2) of the glass part (PGL) are connected respectively to the rest of the glass wall (GLA) having a surface substantially uniform, by substantially flat parts (PPL).
  5. Device (DIS) according to claim 4, in which the inner surfaces of the substantially flat parts (PPL) of the glass wall (GLA) are covered with a third type of material opaque to light obtained from the same process, injection molding and defining portions of light-opaque glass (GLO).
  6. Device (DIS) according to one of claims 4 or 5, wherein at least one light source (SOL) is arranged to diffuse the light in the edges of the first and second branches (BE1, BE2) of the element luminous element (ELU) used as a light guide or to illuminate the rear face(s) of the luminous element (ELU) used as an opaline screen.
  7. Device (DIS) according to one of claims 4 or 5, wherein at least one light source (SOL1 or SOL2) is arranged facing each edge of the first and second branches (BE1, BE2) of the element luminous element (ELU) to illuminate each of the first and second branches (BE1, BE2) of the luminous element (ELU) and in which at least a third light source (SOL3) is arranged facing the light exit window (PGT ) of the ice part (PGL).
  8. Motor vehicle comprising at least one light signaling device (DIS) according to one of the preceding claims.
EP20747052.7A 2019-07-01 2020-06-29 Luminous signalling device for a vehicle Active EP3994389B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1907247A FR3098277A1 (en) 2019-07-01 2019-07-01 Light signaling device for vehicle
PCT/FR2020/051125 WO2021001616A1 (en) 2019-07-01 2020-06-29 Luminous signalling device for a vehicle

Publications (2)

Publication Number Publication Date
EP3994389A1 EP3994389A1 (en) 2022-05-11
EP3994389B1 true EP3994389B1 (en) 2023-09-06

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Application Number Title Priority Date Filing Date
EP20747052.7A Active EP3994389B1 (en) 2019-07-01 2020-06-29 Luminous signalling device for a vehicle

Country Status (4)

Country Link
EP (1) EP3994389B1 (en)
CN (1) CN114072614B (en)
FR (1) FR3098277A1 (en)
WO (1) WO2021001616A1 (en)

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DE10314357A1 (en) * 2003-03-31 2004-10-14 Hella Kg Hueck & Co. Car lamp, especially additional brake light with light source and clear, transparent light outlet disc, with smooth outer face and structured inner surface
JP2006066176A (en) * 2004-08-26 2006-03-09 Imasen Electric Ind Co Ltd Vehicular lighting fixture
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Also Published As

Publication number Publication date
CN114072614A (en) 2022-02-18
EP3994389A1 (en) 2022-05-11
FR3098277A1 (en) 2021-01-08
CN114072614B (en) 2024-05-17
WO2021001616A1 (en) 2021-01-07

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