EP3290779B1 - Lighting and/or signalling device for vehicle, comprising a light guide with widened end - Google Patents

Lighting and/or signalling device for vehicle, comprising a light guide with widened end Download PDF

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Publication number
EP3290779B1
EP3290779B1 EP17187584.2A EP17187584A EP3290779B1 EP 3290779 B1 EP3290779 B1 EP 3290779B1 EP 17187584 A EP17187584 A EP 17187584A EP 3290779 B1 EP3290779 B1 EP 3290779B1
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EP
European Patent Office
Prior art keywords
light guide
light
front portion
main body
flat light
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
EP17187584.2A
Other languages
German (de)
French (fr)
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EP3290779A1 (en
Inventor
Rodolphe Peron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSA Automobiles SA
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PSA Automobiles SA
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Publication date
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Publication of EP3290779A1 publication Critical patent/EP3290779A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/50—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
    • 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
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-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

Definitions

  • the invention relates generally to lighting and / or light signaling devices, intended more particularly for motor vehicles.
  • lighting module such a lighting device and / or light signaling will be referred to hereafter as "lighting module”.
  • the invention therefore relates to a lighting module of a motor vehicle, and more specifically to a lighting module comprising a light signaling function performed by scattering the light emitted by a light source via a light guide of flat type.
  • a lighting module is arranged at the front and rear of a motor vehicle to, on the one hand, to illuminate the road to improve the visibility of the driver of the vehicle, especially in night condition and / or, on the other hand, to signal the position of the vehicle to other road users.
  • a lighting module may consist of a light signaling device whose function is to signal the positioning of the vehicle by day.
  • a device designated DRL for Daytime Running Light (or Lamp) in the English language, meaning daytime running lamp, corresponds to a lighting module automatically turned on during the operation of the vehicle, by day, to improve the visibility of said vehicle.
  • DRL Daytime Running Light
  • Such a device hereafter referred to as a diurnal traffic light device, is mainly positioned in a front lighting module of a motor vehicle.
  • Said diurnal traffic light device comprises, in a known manner, with reference to the figure 1 , a housing closed by a wall, designated ice, consisting more specifically of a two-color ice, having an opaque base and translucent openings, designated "crystal openings".
  • the housing receives at least one light source and a flat light guide capable of diffusing the light emitted by the light source.
  • the translucent openings provided in said mirror allow diffusion, outside said housing, of light from the light source and diffused in the flat light guide. Such openings, according to their positioning, also allow to confer a characteristic light signature of the vehicle concerned.
  • the light function of a daytime running light device is generally achieved by the scattering of light, emitted by one or more light source (s), via a light guide, flat type, designated flat guide or Flat Guide, in English, said flat light guide being mounted inside the aforementioned housing behind the aforementioned ice.
  • Such a flat light guide thus positioned behind the ice has, in the state of the art, a section of constant thickness.
  • Said constant thickness typically limited to an injection thickness of between 6 and 8 mm according to conventional manufacturing techniques of this type of polycarbonate part, does not make it possible to fill the entire width of the aforementioned ice openings. Indeed, as described in figure 2 it results from the functional play between the flat light guide and the ice, a direct visibility of the inside of the housing from the outside, which is unsightly.
  • the invention therefore aims to overcome these drawbacks by proposing a lighting and / or light-signaling device in which the light function is carried out by light scattering, emitted by a light source, via a flat light guide whose section has an enlarged end.
  • Such a device makes it possible to fill the visual defects resulting from the presence of a void space between the flat light guide and the ice, necessary for the ventilation of the housing.
  • Such a device comprising a flat light guide having an enlarged front portion, allows, as such, to prevent the inside of the housing from being visible from the outside.
  • the junction zone between the main body and the front part has a section comprising a radius of curvature of between 1 and 2 mm, said radius of curvature being adapted to allow light to be diffused over the entire surface of the enlarged section of the beam. said front portion.
  • a radius of curvature allows a better diffusion of the light in the entirety of the front part.
  • the main body of the flat light guide is of constant section, allowing a simpler and less expensive manufacture.
  • the diameter of the section of the main body of the flat light guide is between 6 and 8 mm, making it possible to use the conventional manufacturing techniques of this type of polycarbonate part, by injection.
  • the enlarged section of the front portion of the flat light guide comprises three portions: a central portion and two lateral portions extending on either side of the central portion, so as to form said front portion of enlarged thickness .
  • the thickness of the front portion of the flat light guide is 2 to 6 mm greater than the thickness of the main body, thus making it possible to visually fill the functional clearance.
  • the front portion of the flat light guide has a width of between 3 and 12 mm, a width approximately equal to 10% to 14% of the width of the main body.
  • a width small in front of the width of the main body, allows to limit the size inside the housing.
  • the invention also relates to a vehicle comprising a lighting and / or light-signaling device according to the invention.
  • the described embodiments are more particularly related to an implementation of the device according to the invention within a motor vehicle.
  • any implementation in a different context, in particular in any type of vehicle, is also covered by the present invention.
  • the figure 3 represents a lighting device and / or light signaling, designated lighting module.
  • the figure 3 more specifically, in this case, a lighting module corresponding to a device 1 of daytime running light.
  • a device 1 of daytime running light Such a device 1 makes it possible to signal the positioning of the day vehicle.
  • the light function of the daytime running light device 1 is realized by diffusion of the light from light sources in a flat light guide 40.
  • the device 1 presented on the figure 3 comprises a flat guide 40 made according to the invention.
  • the embodiment presented in this document describes a device 1 of daytime running light. It goes without saying that the invention applies to any lighting and / or light-signaling device whose light function is achieved by diffusion of the light emitted by a light source via a flat light guide 40.
  • the device 1 comprises a housing 10, open towards the front, corresponding to the outside of the device 1 mounted on a vehicle, a closing wall, designated ice 20, adapted to cooperate with said housing 10, a flat light guide 40, adapted to fit into said housing 10 and a plurality of light sources (not shown), adapted to fit into the housing 10, so as to inject light into said flat light guide 40 allowing the diffusion of light.
  • the housing 10 has a typically elongate base defining a length and a width of said housing 10.
  • the housing 10 includes, on one of its faces, an opening extending the entire length of said housing 10, as shown in section on the figure 4 . Said housing 10 is closed by the closure wall.
  • the closure wall typically made of plastic material, is conventionally referred to as ice cream 20.
  • the translucent openings 21 allow the diffusion, outside said housing 10, of light from the light source.
  • Said translucent openings 21 extend over the length of the window 20 and can be of any desired shape and / or geometry.
  • Said translucent openings 21 also extend along the width of the ice 20 over a width G. Said width G may vary according to the arrangement of the translucent openings 21 on the ice 20.
  • the device 1 also comprises a flat light guide 40 as well as at least one light source, adapted to inject light into said flat light guide 40 able to diffuse said light.
  • the device 1 comprises a plurality of LED-type light sources, which stands for light-emitting diodes. The light scattered in the flat light guide 40 is thus transmitted outside the housing 10 through the translucent openings 21 of the ice 20 above.
  • Said flat light guide 40 is adapted to fit inside the housing 10, upstream of the window 20, so as to maintain a gap between said flat light guide 40 and said window 20.
  • Such empty space designated functional clearance 50, is necessary for the circulation of air in order to avoid any condensation inside the housing 10.
  • the flat light guide 40 comprises a main body 41 and a front portion 42, extending towards the front of the housing 10 of the device 1.
  • the main body 41 of the flat light guide 40 has a constant section of width L and a thickness E typically of the order of 6 to 8 mm.
  • said flat light guide 40 comprises a front portion 42 of E 'wide thickness, typically of the order of 8 to 14 mm, extending to the front of the device 1.
  • the front portion 42 has a width L', small in front of the width L of the main body 41.
  • the width L 'of the front portion 42 is of the order of 3 to 12 mm and the width L of the main body 41 of 30 to 90 mm along the curve of the flat light guide 40.
  • the widened thickness E' the front portion 42 is larger than the width G the translucent openings 21 arranged in the ice 20.
  • Said translucent openings 21 typically have a width G of the order of magnitude of the thickness E of the main body 41.
  • the sectional view of the front portion 42 shows that the latter comprises three distinct portions: a central portion 421 and two lateral portions 422, 423.
  • the central portion 421 is of identical section to the section of the main body 41.
  • the two lateral portions 422, 423 which may have the same or different dimensions, are adapted to prevent the direct visibility, from the outside, of the inside of the housing 10 via the functional clearance 50, on both sides of the housing.
  • the two side portions 422, 423 thus function to inhibit any visibility of the interior of the housing 10 from the outside, mainly for aesthetic purposes.
  • the junction zone between the main body 41 and the front portion 42 comprises on either side of the central portion 421 a radius of curvature 43, 43 ', for progressively widening the section of the flat light guide 40
  • the radii of curvature 43, 43 ', potentially dissimilar, are of the order of 1 to 2 mm.
  • Such a radius of curvature 43, 43 ' makes it possible to distribute the light uniformly over the entire front portion 42 of the flat light guide 40.
  • the flat light guide 40 in a device 1 of daytime running light according to the invention, can visually mask the functional clearance 50 present between the flat light guide 40 and the ice 20 while ensuring a diffusion of the homogeneous light and complies with the regulations in force.
  • the manufacture of such a flat light guide 40 also incurs no additional cost since it is made from a flat light guide mold of the prior art in which the portion corresponding to the front portion has been dug to obtain a flat light guide 40 expanded at one end.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Description

L'invention concerne, de façon générale, les dispositifs d'éclairage et/ou de signalisation lumineuse, destinés plus particulièrement aux véhicules automobiles. Par souci de concision, un tel dispositif d'éclairage et/ou de signalisation lumineuse sera désigné par la suite « module d'éclairage ».The invention relates generally to lighting and / or light signaling devices, intended more particularly for motor vehicles. For the sake of brevity, such a lighting device and / or light signaling will be referred to hereafter as "lighting module".

L'invention porte par conséquent sur un module d'éclairage d'un véhicule automobile, et plus précisément sur un module d'éclairage comprenant une fonction de signalisation lumineuse réalisée par diffusion de la lumière émise par une source lumineuse via un guide de lumière de type plat.The invention therefore relates to a lighting module of a motor vehicle, and more specifically to a lighting module comprising a light signaling function performed by scattering the light emitted by a light source via a light guide of flat type.

De manière connue, un module d'éclairage est disposé à l'avant et à l'arrière d'un véhicule automobile afin, d'une part, d'éclairer la route pour améliorer la visibilité du conducteur du véhicule, notamment en condition nocturne, et/ou, d'autre part, de signaliser la position du véhicule aux autres usagers de la route.In known manner, a lighting module is arranged at the front and rear of a motor vehicle to, on the one hand, to illuminate the road to improve the visibility of the driver of the vehicle, especially in night condition and / or, on the other hand, to signal the position of the vehicle to other road users.

Selon l'état de la technique, un module d'éclairage peut consister en un dispositif de signalisation lumineuse dont la fonction est de signaler le positionnement du véhicule de jour. Un tel dispositif, désigné DRL pour Daytime Running Light (ou Lamp) en langue anglaise, signifiant feu de circulation diurne, correspond à un module d'éclairage automatiquement allumé lors de la mise en fonctionnement du véhicule, de jour, pour améliorer la visibilité dudit véhicule. Un tel dispositif, désigné par la suite dispositif de feu de circulation diurne, est principalement positionné dans un module d'éclairage avant d'un véhicule automobile.According to the state of the art, a lighting module may consist of a light signaling device whose function is to signal the positioning of the vehicle by day. Such a device, designated DRL for Daytime Running Light (or Lamp) in the English language, meaning daytime running lamp, corresponds to a lighting module automatically turned on during the operation of the vehicle, by day, to improve the visibility of said vehicle. Such a device, hereafter referred to as a diurnal traffic light device, is mainly positioned in a front lighting module of a motor vehicle.

Ledit dispositif de feu de circulation diurne comprend de manière connue, en référence à la figure 1, un boîtier fermé par une paroi, désignée glace, consistant plus précisément en une glace bicolore, présentant une base opaque et des ouvertures translucides, désignées « ouvertures cristal ». Le boîtier reçoit au moins une source lumineuse et un guide de lumière plat apte à diffuser la lumière émise par la source lumineuse. Les ouvertures translucides aménagées dans ladite glace permettent la diffusion, à l'extérieur dudit boîtier, de la lumière provenant de la source lumineuse et diffusée dans le guide de lumière plat. De telles ouvertures, selon leur positionnement, permettent également de conférer une signature lumineuse caractéristique du véhicule concerné.Said diurnal traffic light device comprises, in a known manner, with reference to the figure 1 , a housing closed by a wall, designated ice, consisting more specifically of a two-color ice, having an opaque base and translucent openings, designated "crystal openings". The housing receives at least one light source and a flat light guide capable of diffusing the light emitted by the light source. The translucent openings provided in said mirror allow diffusion, outside said housing, of light from the light source and diffused in the flat light guide. Such openings, according to their positioning, also allow to confer a characteristic light signature of the vehicle concerned.

De manière connue, comme décrit dans le document FR 3014787 ou dans le document FR 3002895 , la fonction lumineuse d'un dispositif de feu de circulation diurne est généralement réalisée par la diffusion de la lumière, émise par une ou plusieurs source(s) lumineuse(s), via un guide de lumière, de type plat, désigné guide plat ou Flat Guide, en langue anglaise, ledit guide de lumière plat étant monté à l'intérieur du boîtier précité derrière la glace précitée.In known manner, as described in document FR 3014787 or in the document FR 3002895 , the light function of a daytime running light device is generally achieved by the scattering of light, emitted by one or more light source (s), via a light guide, flat type, designated flat guide or Flat Guide, in English, said flat light guide being mounted inside the aforementioned housing behind the aforementioned ice.

Afin d'éviter toute condensation dans le dispositif de feu de circulation diurne, due à la différence de température entre la source lumineuse et l'extérieur du boîtier, un espace est conservé à l'intérieur dudit boîtier entre le guide plat et la glace précités, permettant ainsi la circulation de l'air.In order to avoid any condensation in the diurnal traffic light device, due to the temperature difference between the light source and the outside of the housing, a space is kept inside said housing between the flat guide and the above-mentioned ice , thus allowing the circulation of the air.

Un tel guide de lumière plat ainsi positionné derrière la glace, présente, dans l'état de la technique, une section d'épaisseur constante. Ladite épaisseur constante, typiquement limitée à une épaisseur d'injection comprise entre 6 et 8 mm selon les techniques classiques de fabrication de ce type de pièce en polycarbonate, ne permet pas de combler l'intégralité de la largeur des ouvertures de la glace précitées. En effet, comme décrit à la figure 2, il résulte du jeu fonctionnel entre le guide de lumière plat et la glace, une visibilité directe de l'intérieur du boîtier depuis l'extérieur, ce qui est inesthétique.Such a flat light guide thus positioned behind the ice, has, in the state of the art, a section of constant thickness. Said constant thickness, typically limited to an injection thickness of between 6 and 8 mm according to conventional manufacturing techniques of this type of polycarbonate part, does not make it possible to fill the entire width of the aforementioned ice openings. Indeed, as described in figure 2 it results from the functional play between the flat light guide and the ice, a direct visibility of the inside of the housing from the outside, which is unsightly.

L'invention vise donc à pallier ces inconvénients en proposant un dispositif d'éclairage et/ou de signalisation lumineuse dans lequel la fonction lumineuse est réalisée par diffusion de la lumière, émise par une source lumineuse, via un guide de lumière plat dont la section présente une extrémité élargie.The invention therefore aims to overcome these drawbacks by proposing a lighting and / or light-signaling device in which the light function is carried out by light scattering, emitted by a light source, via a flat light guide whose section has an enlarged end.

Plus précisément, pour parvenir à ce résultat, la présente invention concerne un dispositif d'éclairage et/ou de signalisation lumineuse pour véhicule, en particulier pour véhicule automobile, 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, ladite glace étant essentiellement opaque et comprenant des ouvertures translucides adaptées pour permettre la transmission de la lumière issue de ladite au moins une source lumineuse à l'extérieur dudit boîtier, lesdites ouvertures s'étendant sur une largeur de la glace, et
  • un guide de lumière plat, monté dans ledit boîtier, adapté pour diffuser de la lumière issue de ladite au moins une source lumineuse et disposé à une distance prédéterminée de ladite glace de manière à former un espace vide adapté pour permettre une aération dudit boîtier, ledit guide de lumière plat comprenant un corps principal, une partie frontale vers l'avant du boîtier, en vis-à-vis de la glace, et une zone de jonction reliant la partie frontale au corps principal,
la partie frontale dudit guide de lumière plat comprenant une section élargie présentant une épaisseur supérieure à la largeur des ouvertures translucides de ladite glace.More precisely, to achieve this result, the present invention relates to a lighting and / or light-signaling device for a vehicle, in particular for a motor vehicle, comprising:
  • a case open at the front, that is to say outwards when the device is mounted on a vehicle,
  • at least one light source disposed inside the housing,
  • an ice corresponding to a wall adapted to close the case, said ice being essentially opaque and comprising translucent openings adapted to allow the transmission of light from said at least one source outside said housing, said openings extending across a width of the ice, and
  • a flat light guide, mounted in said housing, adapted to diffuse light from said at least one light source and disposed at a predetermined distance from said mirror so as to form a vacuum space adapted to allow ventilation of said housing, said flat light guide comprising a main body, a frontal part towards the front of the case, facing the ice, and a junction zone connecting the front part to the main body,
the front portion of said flat light guide comprising an enlarged section having a thickness greater than the width of the translucent openings of said ice.

Un tel dispositif permet de combler les défauts visuels résultant de la présence d'un espace vide entre le guide de lumière plat et la glace, nécessaire à l'aération du boîtier. Un tel dispositif, comprenant un guide de lumière plat ayant une partie frontale élargie, permet, à ce titre, d'empêcher que l'intérieur du boîtier soit visible depuis l'extérieur.Such a device makes it possible to fill the visual defects resulting from the presence of a void space between the flat light guide and the ice, necessary for the ventilation of the housing. Such a device, comprising a flat light guide having an enlarged front portion, allows, as such, to prevent the inside of the housing from being visible from the outside.

Avantageusement, la zone de jonction entre le corps principal et la partie frontale présente une section comprenant un rayon de courbure compris entre 1 et 2 mm, ledit rayon de courbure étant adapté pour permettre la diffusion de lumière sur toute la surface de la section élargie de ladite partie frontale. Un tel rayon de courbure permet une meilleure diffusion de la lumière dans l'intégralité de la partie frontale.Advantageously, the junction zone between the main body and the front part has a section comprising a radius of curvature of between 1 and 2 mm, said radius of curvature being adapted to allow light to be diffused over the entire surface of the enlarged section of the beam. said front portion. Such a radius of curvature allows a better diffusion of the light in the entirety of the front part.

De manière avantageuse, le corps principal du guide de lumière plat est de section constante, permettant une fabrication plus simple et moins onéreuse.Advantageously, the main body of the flat light guide is of constant section, allowing a simpler and less expensive manufacture.

De manière avantageuse, le diamètre de la section du corps principal du guide de lumière plat est compris entre 6 et 8 mm, permettant d'utiliser les techniques classiques de fabrication de ce type de pièce en polycarbonate, par injection.Advantageously, the diameter of the section of the main body of the flat light guide is between 6 and 8 mm, making it possible to use the conventional manufacturing techniques of this type of polycarbonate part, by injection.

Avantageusement, la section élargie de la partie frontale du guide de lumière plat comprend trois portions : une portion centrale et deux portions latérales s'étendant de part et d'autre de la portion centrale, de façon à former ladite partie frontale d'épaisseur élargie.Advantageously, the enlarged section of the front portion of the flat light guide comprises three portions: a central portion and two lateral portions extending on either side of the central portion, so as to form said front portion of enlarged thickness .

Avantageusement, l'épaisseur de la partie frontale du guide de lumière plat est supérieure de 2 à 6 mm à l'épaisseur du corps principal, permettant ainsi de combler visuellement le jeu fonctionnel.Advantageously, the thickness of the front portion of the flat light guide is 2 to 6 mm greater than the thickness of the main body, thus making it possible to visually fill the functional clearance.

Avantageusement, la partie frontale du guide de lumière plat possède une largeur comprise entre 3 et 12 mm, soit une largeur environ égale à 10% à 14% de la largeur du corps principal. Une telle largeur, petite devant la largeur du corps principal, permet de limiter l'encombrement à l'intérieur du boîtier.Advantageously, the front portion of the flat light guide has a width of between 3 and 12 mm, a width approximately equal to 10% to 14% of the width of the main body. Such a width, small in front of the width of the main body, allows to limit the size inside the housing.

L'invention concerne également un véhicule comprenant un dispositif d'éclairage et/ou de signalisation lumineuse selon l'invention.The invention also relates to a vehicle comprising a lighting and / or light-signaling device according to the invention.

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

  • la figure 1, un schéma d'un dispositif d'éclairage et/ou de signalisation lumineuse selon l'art antérieur,
  • la figure 2, un schéma de profil d'un tel dispositif d'éclairage et/ou de signalisation lumineuse, selon une coupe transverse de la figure 1,
  • la figure 3, un schéma d'un dispositif d'éclairage et/ou de signalisation lumineuse selon l'invention,
  • la figure 4, un schéma de profil d'un tel dispositif d'éclairage et/ou de signalisation lumineuse, selon une coupe transverse de la figure 3,
  • la figure 5, un zoom de la figure 4 correspondant au guide de lumière plat compris dans un dispositif d'éclairage et/ou de signalisation lumineuse selon l'invention.
Other characteristics and advantages of the invention will appear on reading the detailed description of the embodiments of the invention, given by way of example only, and with reference to the drawings which show:
  • the figure 1 a diagram of a lighting and / or light-signaling device according to the prior art,
  • the figure 2 , a profile diagram of such a lighting device and / or light signaling, in a cross section of the figure 1 ,
  • the figure 3 , a diagram of a lighting and / or light-signaling device according to the invention,
  • the figure 4 , a profile diagram of such a lighting device and / or light signaling, in a cross section of the figure 3 ,
  • the figure 5 , a zoom of the figure 4 corresponding to the flat light guide included in a lighting device and / or light signaling according to the invention.

Dans ce qui va suivre, les modes de réalisation décrits s'attachent plus particulièrement à une mise en oeuvre du dispositif selon l'invention au sein d'un véhicule automobile. Cependant, toute mise en oeuvre dans un contexte différent, en particulier dans tout type de véhicule, est également visée par la présente invention.In what follows, the described embodiments are more particularly related to an implementation of the device according to the invention within a motor vehicle. However, any implementation in a different context, in particular in any type of vehicle, is also covered by the present invention.

La figure 3 représente un dispositif d'éclairage et/ou de signalisation lumineuse, désigné module d'éclairage. La figure 3 présente plus précisément, en l'espèce, un module d'éclairage correspondant à un dispositif 1 de feu de circulation diurne. Un tel dispositif 1 permet de signaler le positionnement du véhicule de jour. La fonction lumineuse du dispositif 1 de feu de circulation diurne est réalisée par diffusion de la lumière provenant de sources lumineuses dans un guide de lumière plat 40. Le dispositif 1 présenté sur la figure 3 comprend un guide plat 40 réalisé conformément à l'invention.The figure 3 represents a lighting device and / or light signaling, designated lighting module. The figure 3 more specifically, in this case, a lighting module corresponding to a device 1 of daytime running light. Such a device 1 makes it possible to signal the positioning of the day vehicle. The light function of the daytime running light device 1 is realized by diffusion of the light from light sources in a flat light guide 40. The device 1 presented on the figure 3 comprises a flat guide 40 made according to the invention.

Le mode de réalisation présenté dans ce document décrit un dispositif 1 de feu de circulation diurne. Il va de soi que l'invention s'applique à tout dispositif d'éclairage et/ou de signalisation lumineuse dont la fonction lumineuse est réalisée par diffusion de la lumière émise par une source lumineuse via un guide de lumière plat 40.The embodiment presented in this document describes a device 1 of daytime running light. It goes without saying that the invention applies to any lighting and / or light-signaling device whose light function is achieved by diffusion of the light emitted by a light source via a flat light guide 40.

En référence à la figure 3, le dispositif 1 selon l'invention comprend un boîtier 10, ouvert vers l'avant, correspondant à l'extérieur du dispositif 1 monté sur un véhicule, une paroi de fermeture, désignée glace 20, adaptée pour coopérer avec ledit boîtier 10, un guide de lumière plat 40, adapté pour s'insérer dans ledit boîtier 10 et une pluralité de sources lumineuses (non représentées), adaptées pour s'insérer dans le boîtier 10, de façon à injecter de la lumière dans ledit guide de lumière plat 40 permettant la diffusion de la lumière.With reference to the figure 3 , the device 1 according to the invention comprises a housing 10, open towards the front, corresponding to the outside of the device 1 mounted on a vehicle, a closing wall, designated ice 20, adapted to cooperate with said housing 10, a flat light guide 40, adapted to fit into said housing 10 and a plurality of light sources (not shown), adapted to fit into the housing 10, so as to inject light into said flat light guide 40 allowing the diffusion of light.

Le boîtier 10 présente une base typiquement de forme allongée, définissant une longueur et une largeur dudit boîtier 10. Le boîtier 10 comprend, sur l'une de ses faces, vers l'avant, une ouverture s'étendant sur toute la longueur dudit boîtier 10, comme présenté en coupe sur la figure 4. Ledit boîtier 10 est fermé par la paroi de fermeture.The housing 10 has a typically elongate base defining a length and a width of said housing 10. The housing 10 includes, on one of its faces, an opening extending the entire length of said housing 10, as shown in section on the figure 4 . Said housing 10 is closed by the closure wall.

La paroi de fermeture, typiquement en matériau plastique, est classiquement désignée glace 20. Ladite glace 20, ainsi positionnée à l'avant du boîtier 10 afin de permettre la fermeture du boîtier 10, est typiquement une paroi bicolore, présentant une base opaque et des ouvertures translucides 21, également désignées « ouvertures cristal ». Les ouvertures translucides 21 permettent la diffusion, à l'extérieur dudit boîtier 10, de la lumière provenant de la source lumineuse. Lesdites ouvertures translucides 21 s'étendent sur la longueur de la glace 20 et peuvent être de toute forme et/ou géométrie souhaitée. Lesdites ouvertures translucides 21 s'étendent également selon la largeur de la glace 20 sur une largeur G. Ladite largeur G peut varier suivant la disposition des ouvertures translucides 21 sur la glace 20.The closure wall, typically made of plastic material, is conventionally referred to as ice cream 20. Said ice-cream 20, thus positioned at the front of the housing 10 in order to allow the closure of the housing 10, is typically a two-colored wall having an opaque base and translucent openings 21, also referred to as "crystal openings". The translucent openings 21 allow the diffusion, outside said housing 10, of light from the light source. Said translucent openings 21 extend over the length of the window 20 and can be of any desired shape and / or geometry. Said translucent openings 21 also extend along the width of the ice 20 over a width G. Said width G may vary according to the arrangement of the translucent openings 21 on the ice 20.

Selon l'invention, le dispositif 1 comprend également un guide de lumière plat 40 ainsi qu'au moins une source lumineuse, adaptée pour injecter de la lumière dans ledit guide de lumière plat 40 apte à diffuser ladite la lumière. Selon un mode de réalisation, le dispositif 1 comprend une pluralité de sources de lumière de type DEL, acronyme signifiant diodes électroluminescentes. La lumière diffusée dans le guide de lumière plat 40 est ainsi transmise à l'extérieur du boîtier 10 par l'intermédiaire des ouvertures translucides 21 de la glace 20 précitées.According to the invention, the device 1 also comprises a flat light guide 40 as well as at least one light source, adapted to inject light into said flat light guide 40 able to diffuse said light. According to one embodiment, the device 1 comprises a plurality of LED-type light sources, which stands for light-emitting diodes. The light scattered in the flat light guide 40 is thus transmitted outside the housing 10 through the translucent openings 21 of the ice 20 above.

Ledit guide de lumière plat 40 est adapté pour s'insérer à l'intérieur du boîtier 10, en amont de la glace 20, de manière à conserver un espace vide entre ledit guide de lumière plat 40 et ladite glace 20. Un tel espace vide, désigné jeu fonctionnel 50, est nécessaire à la circulation de l'air afin d'éviter toute condensation à l'intérieur du boîtier 10.Said flat light guide 40 is adapted to fit inside the housing 10, upstream of the window 20, so as to maintain a gap between said flat light guide 40 and said window 20. Such empty space , designated functional clearance 50, is necessary for the circulation of air in order to avoid any condensation inside the housing 10.

En référence à la figure 4, qui montre une vue en coupe transverse d'un dispositif 1 de feu diurne selon l'invention, le guide de lumière plat 40 comprend un corps principal 41 et une partie frontale 42, s'étendant vers l'avant du boîtier 10 du dispositif 1. Le corps principal 41 du guide de lumière plat 40 présente une section constante de largeur L et une épaisseur E typiquement de l'ordre de 6 à 8 mm.With reference to the figure 4 , which shows a cross-sectional view of a diurnal light device 1 according to the invention, the flat light guide 40 comprises a main body 41 and a front portion 42, extending towards the front of the housing 10 of the device 1. The main body 41 of the flat light guide 40 has a constant section of width L and a thickness E typically of the order of 6 to 8 mm.

Afin d'empêcher que l'intérieur du boîtier 10 soit visible depuis l'extérieur du fait de la présence du jeu fonctionnel 50 entre le guide de lumière plat 40 et la glace 20, ledit guide de lumière plat 40 comprend une partie frontale 42 d'épaisseur élargie E', typiquement de l'ordre de 8 à 14 mm, s'étendant à l'avant du dispositif 1. La partie frontale 42 présente une largeur L', petite devant la largeur L du corps principal 41. Typiquement la largeur L' de la partie frontale 42 est de l'ordre de 3 à 12 mm et la largeur L du corps principal 41 de 30 à 90 mm suivant la courbe du guide de lumière plat 40. Par ailleurs, l'épaisseur élargie E' de la partie frontale 42 est plus grande que la largeur G les ouvertures translucides 21 aménagées dans la glace 20. Lesdites ouvertures translucides 21 présentent typiquement une largeur G de l'ordre de grandeur de l'épaisseur E du corps principal 41.In order to prevent the inside of the case 10 from being visible from the outside due to the presence of the functional clearance 50 between the flat light guide 40 and the window 20, said flat light guide 40 comprises a front portion 42 of E 'wide thickness, typically of the order of 8 to 14 mm, extending to the front of the device 1. The front portion 42 has a width L', small in front of the width L of the main body 41. Typically the width L 'of the front portion 42 is of the order of 3 to 12 mm and the width L of the main body 41 of 30 to 90 mm along the curve of the flat light guide 40. Moreover, the widened thickness E' the front portion 42 is larger than the width G the translucent openings 21 arranged in the ice 20. Said translucent openings 21 typically have a width G of the order of magnitude of the thickness E of the main body 41.

En référence à la figure 5, la vue en coupe de la partie frontale 42 montre que cette dernière comprend trois portions distinctes : une portion centrale 421 et deux portions latérales 422, 423. La portion centrale 421 est de section identique à la section du corps principal 41. Ainsi la portion centrale 421 garantie, à elle seule, les contraintes de photométrie imposées, en Europe, par les règlementations décrites dans les directives ECE R87 et ECE R7. Les deux portions latérales 422, 423, qui peuvent présenter des dimensions identiques ou différentes, sont adaptées pour empêcher la visibilité directe, depuis l'extérieur, de l'intérieur du boîtier 10 via le jeu fonctionnel 50, de part et d'autre de la portion centrale 421. Les deux portions latérales 422, 423 ont ainsi pour fonction d'inhiber toute visibilité de l'intérieur du boîtier 10 depuis l'extérieur, essentiellement à des fins esthétiques.With reference to the figure 5 the sectional view of the front portion 42 shows that the latter comprises three distinct portions: a central portion 421 and two lateral portions 422, 423. The central portion 421 is of identical section to the section of the main body 41. Thus the portion Central 421 alone guarantees the photometric constraints imposed in Europe by the regulations described in ECE R87 and ECE R7. The two lateral portions 422, 423, which may have the same or different dimensions, are adapted to prevent the direct visibility, from the outside, of the inside of the housing 10 via the functional clearance 50, on both sides of the housing. the central portion 421. The two side portions 422, 423 thus function to inhibit any visibility of the interior of the housing 10 from the outside, mainly for aesthetic purposes.

Selon un mode de réalisation préféré, toujours en référence à la figure 5, la zone de jonction entre le corps principal 41 et la partie frontale 42, comprend de part et d'autre de la portion centrale 421 un rayon de courbure 43, 43', permettant d'élargir progressivement la section du guide de lumière plat 40. Les rayons de courbure 43, 43', potentiellement dissemblables, sont de l'ordre de 1 à 2 mm. Un tel rayon de courbure 43, 43' permet de diffuser la lumière de manière uniforme sur toute la partie frontale 42 du guide de lumière plat 40.According to a preferred embodiment, again with reference to the figure 5 , the junction zone between the main body 41 and the front portion 42, comprises on either side of the central portion 421 a radius of curvature 43, 43 ', for progressively widening the section of the flat light guide 40 The radii of curvature 43, 43 ', potentially dissimilar, are of the order of 1 to 2 mm. Such a radius of curvature 43, 43 'makes it possible to distribute the light uniformly over the entire front portion 42 of the flat light guide 40.

De manière avantageuse, le guide de lumière plat 40, dans un dispositif 1 de feu diurne selon l'invention, permet de masquer visuellement le jeu fonctionnel 50 présent entre le guide de lumière plat 40 et la glace 20 tout en assurant une diffusion de la lumière homogène et conforme à la réglementation en vigueur. La fabrication d'un tel guide de lumière plat 40 n'engage également pas de surcoût puisqu'il est réalisé à partir d'un moule de guide de lumière plat de l'art antérieur dans lequel la partie correspondant à la partie frontale a été creusée afin d'obtenir un guide de lumière plat 40 élargi à une extrémité.Advantageously, the flat light guide 40, in a device 1 of daytime running light according to the invention, can visually mask the functional clearance 50 present between the flat light guide 40 and the ice 20 while ensuring a diffusion of the homogeneous light and complies with the regulations in force. The manufacture of such a flat light guide 40 also incurs no additional cost since it is made from a flat light guide mold of the prior art in which the portion corresponding to the front portion has been dug to obtain a flat light guide 40 expanded at one end.

Claims (8)

  1. Illumination and/or light signalling device (1) for a vehicle, in particular for a motor vehicle, said device (1) comprising:
    - a box (10) open to the front, i.e. towards the outside when the device (1) is mounted on a vehicle,
    - at least one light source arranged inside the box (10),
    - a mirror (20) corresponding to a wall adapted to close the box (10), said mirror (20) being mainly opaque and comprising translucid openings (21) adapted to make it possible for the transmission of the light from said at least one light source to the outside of said box (10), said translucid openings (21) extending over a width (G) of the mirror (20), and
    - a flat light guide (40), mounted in said box (10), adapted to diffuse the light from said at least one light source and arranged at a predetermined distance from said mirror (20) so as to form an empty space, corresponding to a functional clearance (50) adapted to make it possible for an aeration of said box (10), said flat light guide (40) comprising a main body (41), a front portion (42) towards the front of the box (10), opposite the mirror (20), and a joining zone connecting the front portion (42) to the main body (41),
    characterised by
    the front portion (42) of said flat light guide (40) comprising an expanded cross-section having a thickness (E') greater than the width (G) of the translucid openings (21) of said mirror (20).
  2. Device (1) according to claim 1, wherein the joining zone between the main body (41) and the front portion (42) has a bend radius (43, 43') of between 1 and 2 mm, said bend radius being adapted to make it possible for the diffusion of light over the whole expanded cross-section of said front portion (42).
  3. Device (1) according to one of the preceding claims, wherein the main body (41) of the flat light guide (40) is of a constant cross-section.
  4. Device (1) according to one of the preceding claims, wherein the diameter of the cross-section of the main body (41) of the flat light guide (40) is of between 6 and 8 mm.
  5. Device (1) according to one of the preceding claims, wherein the expanded cross-section of the front portion (42) of the flat light guide (40) comprises three portions: a central portion (421) and two side portions (422, 423) extending on either side of the central portion (421), so as to form said front portion (42) of an expanded thickness (E').
  6. Device (1) according to one of the preceding claims, wherein the thickness (E') of the front portion (42) of the flat light guide (40) is greater than 2 to 6 mm to the thickness (E) of the main body (41).
  7. Device (1) according to one of the preceding claims, wherein the front portion (42) of the flat light guide (40) has a width (L') of between 3 and 12 mm.
  8. Motor vehicle comprising at least one illumination and/or light signalling device (1) according to one of the preceding claims.
EP17187584.2A 2016-09-01 2017-08-23 Lighting and/or signalling device for vehicle, comprising a light guide with widened end Active EP3290779B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1658116A FR3055264B1 (en) 2016-09-01 2016-09-01 LIGHTING AND / OR LIGHT-SIGNALING DEVICE FOR VEHICLE, COMPRISING A WIDE-LIGHTED GUIDE WITH EXTENDED ENLARGEMENT

Publications (2)

Publication Number Publication Date
EP3290779A1 EP3290779A1 (en) 2018-03-07
EP3290779B1 true EP3290779B1 (en) 2019-08-07

Family

ID=57121422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17187584.2A Active EP3290779B1 (en) 2016-09-01 2017-08-23 Lighting and/or signalling device for vehicle, comprising a light guide with widened end

Country Status (4)

Country Link
EP (1) EP3290779B1 (en)
CN (1) CN108302472B (en)
ES (1) ES2744102T3 (en)
FR (1) FR3055264B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3095259B1 (en) * 2019-04-16 2021-03-19 Psa Automobiles Sa A planar light guide having a smooth finished light emitting surface and a motor vehicle light having such a guide.
FR3098277A1 (en) 2019-07-01 2021-01-08 Psa Automobiles Sa Light signaling device for vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2794218B1 (en) * 1999-05-26 2001-07-13 Valeo Vision SIGNAL LIGHT FOR A MOTOR VEHICLE
FR2934353B1 (en) * 2008-07-25 2011-03-11 Valeo Vision Sas OPTICAL SYSTEM WITH LARGE EMISSION SURFACE LIGHTING FUNCTION FOR MOTOR VEHICLE
FR2967235B1 (en) * 2010-11-05 2014-10-31 Valeo Vision LIGHTING OR SIGNALING DEVICE FOR A MOTOR VEHICLE HAVING A LIGHT GUIDE RAIL.
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN108302472A (en) 2018-07-20
CN108302472B (en) 2021-05-28
FR3055264B1 (en) 2018-08-17
ES2744102T3 (en) 2020-02-21
EP3290779A1 (en) 2018-03-07
FR3055264A1 (en) 2018-03-02

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