EP3728940B1 - Light device whose interior colour is homogeneous in daylight - Google Patents

Light device whose interior colour is homogeneous in daylight Download PDF

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Publication number
EP3728940B1
EP3728940B1 EP18833476.7A EP18833476A EP3728940B1 EP 3728940 B1 EP3728940 B1 EP 3728940B1 EP 18833476 A EP18833476 A EP 18833476A EP 3728940 B1 EP3728940 B1 EP 3728940B1
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EP
European Patent Office
Prior art keywords
light
light device
colour
reflective surface
light source
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.)
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Application number
EP18833476.7A
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German (de)
French (fr)
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EP3728940A1 (en
Inventor
Stéphanie BERGERAT
Franck ARRIVET
Yann KUSIAK
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.)
Marelli Automotive Lighting France SAS
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Marelli Automotive Lighting France SAS
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Publication of EP3728940A1 publication Critical patent/EP3728940A1/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
    • F21S43/255—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/33—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors

Definitions

  • the present invention relates to the technical field of lighting and/or light signaling. It relates more particularly to a light and/or signaling device for a motor vehicle.
  • These luminous devices comprise reflective surfaces making it possible to direct outwardly and in a desired direction, the light beam emitted by a light source.
  • Metal surfaces are preferred because of their high reflection coefficient, such as chrome or aluminum.
  • These metallic surfaces are characterized by a light color in daylight, which can cause an undesired contrast with the body color. This is particularly the case when the bodywork is dark in color, modifying locally and in a pronounced manner the aesthetic appearance of the vehicle.
  • the document FR3025286A1 also describes a luminous device for a motor vehicle, comprising a light source, a reflecting surface and a colored surface arranged opposite the reflecting surface.
  • the light source is arranged on the colored surface so that the light source is apparent in the light device, directly visible to an observer of said light device. The apparent presence of the light source in the light device then breaks the colorimetric homogeneity of the light device visible to an observer.
  • the present invention aims to solve this problem by proposing a lighting device whose interior, in daylight, has a more homogeneous appearance compared to current lighting devices.
  • the present invention proposes a luminous device for a motor vehicle according to claim 1.
  • the invention is remarkable in that the light source is flush with or is slightly set back from the colored surface, so that the light source is not directly visible to an observer of the light device.
  • the luminous device thus offers a visual impression of a cavity of homogeneous color, with no element likely to harm this impression.
  • the invention thus proposes to place opposite the reflecting surface a surface of different color, so as to modify in a desired manner the tint of at least part of the reflecting surface, visible by an observer of the luminous device.
  • the colored surface makes it easy to modify the tint of the reflective surface without it being necessary for this to carry out complex and costly treatments of the reflective surface.
  • the presence of the colored surface advantageously makes it possible to modify the tint of the reflecting surface, so that in daylight the interior of the luminous device is of a chosen and homogeneous or substantially homogeneous color.
  • the color surface can be chosen from so that the color of the reflective surface is close to or substantially the same as the bodywork of a motor vehicle comprising said light device.
  • the reflective surface comprises at least one proximal part of concave shape and facing the light source, in order to make it possible to direct the light beam emitted by the light source towards the outside of the light device.
  • proximal is meant a portion of the reflective surface close to the light source.
  • the concave shape of the proximal part makes it possible to restrict the depth of the light device, for the same optical path of the light beam in said device.
  • depth means a direction substantially parallel to the exit direction of the light beam from the light device.
  • the colored surface is substantially parallel to the exit direction of the light beam from the light device. This embodiment makes it possible to restrict the size of the light device along a direction that is substantially normal to the light beam and to the color surface.
  • the reflective surface comprises at least one distal part substantially parallel to the colored surface. This embodiment also makes it possible to restrict the size of the light device in a direction substantially normal to the light beam and to the reflecting surface.
  • the distal part of the reflective surface is set back from the colored surface.
  • the distal part of the reflective surface faces at least part of the colored surface.
  • At least part of the colored surface is opposite the proximal part of the reflective surface.
  • the present invention favors the fact that the color surface is opposite the largest possible surface of the reflective layer.
  • the reflective surface has part of its surface recessed from its proximal part. This embodiment is intended to favor a greater opening angle of the light beam emerging from the light device.
  • the light source is arranged so that its light beam is substantially normal to the colored surface, before reflection on the proximal part of the reflecting surface.
  • the reflective surface and/or the colored surface is at least partially grained.
  • grained is meant the presence of elements on the surface and/or at the level of said surfaces, favoring a greater diffusion of light.
  • the colored surface is dark in color, for example black or black in tint.
  • the invention is not limited to this single example of color, so that the color surface could be light in color, such as red, yellow or amber.
  • the color surface may include several distinctive colors so as to form a desired visual impression at the reflective surface.
  • the light source is chosen so as to indicate to other road users the braking and/or the position of a motor vehicle equipped with said light device.
  • the invention also relates to a traffic light comprising a light device described above, and also to a motor vehicle comprising at least one such traffic light.
  • the invention proposes a light device whose interior, in daylight, is of homogeneous color and chosen with respect to current lighting devices.
  • FIG. 1 illustrates a non-limiting embodiment of a light device 2 according to the invention.
  • the light device 2 comprises a light source 4 held on a plate 6.
  • the light source 4 is arranged so that its light beam 8 is substantially parallel to the plate.
  • Plate 6 also serves as a support for an optical box 10 comprising an upper element 12 and a lower element 14.
  • the terms “upper” and “lower” are chosen arbitrarily, and therefore do not limit the mode embodiment described here.
  • the upper element 12 of the optical unit 10 is held to the plate 6 via an appendage 16A and known means.
  • the upper element 12 comprises a proximal part 18A, arranged opposite the light source 4, and a distal part 20A extending as far as an opening 22 of said casing.
  • the proximal part 18A is covered with a reflective layer 24, at the level of an internal face 26A facing the lower element 14 of the optical box.
  • the reflective layer 24 thus forms a reflective surface on which the light beam 8 emitted by the light source is reflected in the direction of the opening 22.
  • the internal face 26A of the proximal part 18A is of concave shape.
  • the plate 6 includes a hole 28 to allow the passage of one end of the proximal part 18A, in order to facilitate the positioning of the center of curvature of the internal face 26A at the level of the light source 4.
  • the presence of the hole 28 in the plate 6 makes it possible in particular to restrict the depth of the light device.
  • the depth is understood as a dimension substantially parallel to the direction of the light beam 8 emerging from the light device.
  • the upper element 12 of the light device has a shoulder 30 so that its internal face 26A, at its distal part 20A, is recessed with respect to its proximal part 18A.
  • the shoulder 30 delimits the proximal part 18A from the distal part 20A of the upper element 12.
  • the height of the luminous device 2 can be adapted independently of the dimension of its proximal part 18A.
  • the term "height" means a dimension substantially normal to the depth of the light device, passing through the upper element 12 and the lower element 14. The height of the light device can then be advantageously chosen independently of the function of illumination of the device itself, in order to offer embodiments likely to meet different expectations, in particular aesthetic considerations.
  • the distal part 20A is also covered at its internal face 26A by a reflective layer 24.
  • the reflective layer 24 is a metal deposit of the chromium or aluminum type, forming a reflective surface at the level of the internal face 26A of the upper element 12.
  • the lower element 14 of the optical box 10 is also held to the plate 6, via an appendix 16B and known means.
  • the lower element 14 of the optical box comprises a proximal part 18B, arranged as its name indicates near the light source 4, and a distal part 20B extending as far as the opening 22 delimited by the element upper 12 and the lower element 14 of the optical box 10.
  • the opening 22 is closed off by a lens 32 without this limiting the invention.
  • There internal face 26B of the lower element 14, located vis-à-vis the upper element 12, has a flat or substantially flat surface.
  • the internal face 26B is covered with a colored layer 34, so as to present a different colored surface with respect to the reflective layer 24.
  • the colored surface 34 is dark or black in color.
  • the inner face 26B is parallel or substantially parallel to the exit direction of the light beam 8 from the light device, so as to face the reflective layer 24.
  • the lower element 14 is arranged so that the light source flush with or slightly set back from the colored surface 34, so as not to be visible to an observer of the light device 2.
  • the color layer 34 is illuminated by daylight 36, its color is then reflected on the reflective layer 24 or reflective surface.
  • the observer can also see the colored surface through the intermediary of the reflective layer 24, in particular at the level of the proximal part 18A of the upper element 12. Therefore, an observer looking at the daytime l inside the luminous device 2 through the opening 22, perceives a color of relatively uniform tint at the level of the internal faces 26A, 26B of the upper element and of the lower element.
  • the invention therefore makes it possible to easily and economically modify the tint of the reflective surface of the upper element 12, without it being necessary for this to carry out complicated and costly treatments at the level of the reflective layer 24. Otherwise In other words, the color layer 34 or color surface easily makes it possible to modify the appearance of the tint of the interior of the optical box 10, when the luminous device is switched off.
  • the invention is not limited to this single embodiment so that the following variants can be reproduced, in isolation or else combined together, to produce new embodiments.
  • the reflective layer 24 can be treated in such a way as to promote greater diffusion of the light in order to provide a luminous device with a more homogeneous tint.
  • the reflective surface can be grained.
  • the hue of the colored surface 34 can be close to or similar to that of the beam of light emitted by the light source 4.
  • the colored surface 34 can include several different shades in order to form a more or less complex pattern.
  • the tint of the color surface can vary progressively in the direction of the depth of the optical housing.

Description

Domaine techniqueTechnical area

La présente invention concerne le domaine technique de l'éclairage et/ou de la signalisation lumineuse. Elle concerne plus particulièrement un dispositif lumineux et/ou de la signalisation pour véhicule automobile.The present invention relates to the technical field of lighting and/or light signaling. It relates more particularly to a light and/or signaling device for a motor vehicle.

État de la techniqueState of the art

Les normes réglementaires imposent à chaque véhicule automobile d'être équipé de dispositifs lumineux afin d'avertir les autres usagers de la route de la présence et des intentions du conducteur. On peut citer notamment les feux de position de couleur rouge et d'intensité modérée situés à l'arrière du véhicule pour signaler sa position et les feux-stops également de couleur rouge, mais d'intensité plus forte pour signaler un freinage.Regulatory standards require each motor vehicle to be fitted with luminous devices in order to warn other road users of the driver's presence and intentions. Mention may be made in particular of the position lights of red color and of moderate intensity located at the rear of the vehicle to signal its position and the stop lights also of red color, but of higher intensity to signal braking.

Ces dispositifs lumineux comportent des surfaces réfléchissantes permettant de diriger vers l'extérieur et selon une direction souhaitée, le faisceau lumineux émis par une source de lumière. Les surfaces métalliques sont privilégiées en raison de leur fort coefficient de réflexion, comme le chrome ou l'aluminium. Ces surfaces métalliques se caractérisent par une couleur claire à la lumière du jour, ce qui peut engendrer un contraste non souhaité avec la couleur de la carrosserie. C'est notamment le cas lorsque la carrosserie est de couleur sombre, modifiant localement et de façon prononcée l'aspect esthétique du véhicule.These luminous devices comprise reflective surfaces making it possible to direct outwardly and in a desired direction, the light beam emitted by a light source. Metal surfaces are preferred because of their high reflection coefficient, such as chrome or aluminum. These metallic surfaces are characterized by a light color in daylight, which can cause an undesired contrast with the body color. This is particularly the case when the bodywork is dark in color, modifying locally and in a pronounced manner the aesthetic appearance of the vehicle.

Le document FR3025286A1 décrit également un dispositif lumineux pour véhicule automobile, comprenant une source de lumière, une surface réfléchissante et une surface de couleur agencée en vis-à-vis de la surface réfléchissante. La source de lumière est agencée sur la surface de couleur de sorte que la source de lumière est apparente dans le dispositif lumineux, directement visible par un observateur dudit dispositif lumineux. La présence apparente de la source de lumière dans le dispositif lumineux, rompt alors l'homogénéité colorimétrique du dispositif lumineux visible par un observateur.The document FR3025286A1 also describes a luminous device for a motor vehicle, comprising a light source, a reflecting surface and a colored surface arranged opposite the reflecting surface. The light source is arranged on the colored surface so that the light source is apparent in the light device, directly visible to an observer of said light device. The apparent presence of the light source in the light device then breaks the colorimetric homogeneity of the light device visible to an observer.

La présente invention vise à résoudre cette problématique en proposant un dispositif lumineux dont l'intérieur, à la lumière du jour, est d'apparence plus homogène par rapport aux dispositifs d'éclairage actuels.The present invention aims to solve this problem by proposing a lighting device whose interior, in daylight, has a more homogeneous appearance compared to current lighting devices.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Afin de remédier à l'inconvénient précité de l'état de la technique, la présente invention propose un dispositif lumineux pour véhicule automobile selon la revendication 1.In order to remedy the aforementioned drawback of the state of the art, the present invention proposes a luminous device for a motor vehicle according to claim 1.

L'invention est remarquable en ce que la source de lumière affleure ou est légèrement en retrait de la surface de couleur, de sorte que la source de lumière ne soit pas directement visible par un observateur du dispositif lumineux. Le dispositif lumineux offre ainsi une impression visuelle d'une cavité de couleur homogène, sans élément susceptible de nuire à cette impression.The invention is remarkable in that the light source is flush with or is slightly set back from the colored surface, so that the light source is not directly visible to an observer of the light device. The luminous device thus offers a visual impression of a cavity of homogeneous color, with no element likely to harm this impression.

L'invention propose ainsi de mettre en vis-à-vis de la surface réfléchissante une surface de couleur différente, de manière à modifier de façon souhaitée la teinte d'au moins une partie de la surface réfléchissante, visible par un observateur du dispositif lumineux. Ainsi, de façon avantageuse, la surface de couleur permet facilement de modifier la teinte de la surface réfléchissante sans qu'il soit pour cela nécessaire de réaliser des traitements complexes et coûteux de la surface réfléchissante. La présence de la surface de couleur permet avantageusement de modifier la teinte de la surface réfléchissante, de sorte qu'à la lumière du jour l'intérieur du dispositif lumineux soit de couleur choisie et homogène ou sensiblement homogène. Par exemple, la surface de couleur peut être choisie de sorte que la teinte de la surface réfléchissante soit proche ou sensiblement la même que la carrosserie d'un véhicule automobile comportant ledit dispositif lumineux.The invention thus proposes to place opposite the reflecting surface a surface of different color, so as to modify in a desired manner the tint of at least part of the reflecting surface, visible by an observer of the luminous device. . Thus, advantageously, the colored surface makes it easy to modify the tint of the reflective surface without it being necessary for this to carry out complex and costly treatments of the reflective surface. The presence of the colored surface advantageously makes it possible to modify the tint of the reflecting surface, so that in daylight the interior of the luminous device is of a chosen and homogeneous or substantially homogeneous color. For example, the color surface can be chosen from so that the color of the reflective surface is close to or substantially the same as the bodywork of a motor vehicle comprising said light device.

La surface réfléchissante comporte au moins une partie proximale de forme concave et en vis-à-vis de la source de lumière, afin de permettre de diriger le faisceau lumineux émis par la source de lumière en direction de l'extérieur du dispositif lumineux. Par le terme « proximal », on entend une partie de la surface réfléchissante proche de la source de lumière. La forme concave de la partie proximale permet de restreindre la profondeur du dispositif lumineux, pour un même chemin optique du faisceau lumineux dans ledit dispositif. Par le terme « profondeur », on entend une direction sensiblement parallèle à la direction de sortie du faisceau lumineux du dispositif lumineux.The reflective surface comprises at least one proximal part of concave shape and facing the light source, in order to make it possible to direct the light beam emitted by the light source towards the outside of the light device. By the term "proximal" is meant a portion of the reflective surface close to the light source. The concave shape of the proximal part makes it possible to restrict the depth of the light device, for the same optical path of the light beam in said device. The term "depth" means a direction substantially parallel to the exit direction of the light beam from the light device.

Selon une variante de réalisation de l'invention, la surface de couleur est sensiblement parallèle à la direction de sortie du faisceau lumineux du dispositif lumineux. Ce mode de réalisation permet de restreindre l'encombrement du dispositif lumineux selon une direction sensiblement normale au faisceau lumineux et à la surface de couleur.According to a variant embodiment of the invention, the colored surface is substantially parallel to the exit direction of the light beam from the light device. This embodiment makes it possible to restrict the size of the light device along a direction that is substantially normal to the light beam and to the color surface.

Selon une autre variante de réalisation de l'invention, la surface réfléchissante comporte au moins une partie distale sensiblement parallèle à la surface de couleur. Ce mode de réalisation permet également de restreindre l'encombrement du dispositif lumineux selon une direction sensiblement normale au faisceau lumineux et à la surface réfléchissante.According to another alternative embodiment of the invention, the reflective surface comprises at least one distal part substantially parallel to the colored surface. This embodiment also makes it possible to restrict the size of the light device in a direction substantially normal to the light beam and to the reflecting surface.

Selon une autre variante de réalisation de l'invention, la partie distale de la surface réfléchissante est en retrait de la surface de couleur.According to another alternative embodiment of the invention, the distal part of the reflective surface is set back from the colored surface.

Selon une autre variante de réalisation de l'invention, la partie distale de la surface réfléchissante est en vis-à-vis avec au moins une partie de la surface de couleur.According to another alternative embodiment of the invention, the distal part of the reflective surface faces at least part of the colored surface.

Selon une autre variante de réalisation de l'invention, au moins une partie de la surface de couleur est en vis-à-vis de la partie proximale de la surface réfléchissante. En d'autres termes, la présente invention privilégie le fait que la surface de couleur soit en vis-à-vis de la plus grande surface possible de la couche réfléchissante.According to another alternative embodiment of the invention, at least part of the colored surface is opposite the proximal part of the reflective surface. In other words, the present invention favors the fact that the color surface is opposite the largest possible surface of the reflective layer.

Selon une autre variante de réalisation de l'invention, la surface réfléchissante comporte une partie de sa surface en retrait de sa partie proximale. Ce mode de réalisation vise à favoriser un angle d'ouverture plus important du faisceau lumineux sortant du dispositif lumineux.According to another alternative embodiment of the invention, the reflective surface has part of its surface recessed from its proximal part. This embodiment is intended to favor a greater opening angle of the light beam emerging from the light device.

Selon une autre variante de réalisation de l'invention, la source de lumière est agencée de sorte que son faisceau lumineux est sensiblement normal à la surface de couleur, avant réflexion sur la partie proximale de la surface réfléchissante.According to another alternative embodiment of the invention, the light source is arranged so that its light beam is substantially normal to the colored surface, before reflection on the proximal part of the reflecting surface.

Selon une autre variante de réalisation de l'invention, la surface réfléchissante et/ou la surface de couleur est au moins partiellement grainée. Par le terme « grainé », on entend la présence d'éléments à la surface et/ou au niveau desdites surfaces, favorisant une plus grande diffusion de la lumière.According to another alternative embodiment of the invention, the reflective surface and/or the colored surface is at least partially grained. By the term “grained”, is meant the presence of elements on the surface and/or at the level of said surfaces, favoring a greater diffusion of light.

Selon une autre variante de réalisation de l'invention, la surface de couleur est de couleur sombre, par exemple noir ou de teinte noire. Bien entendu, l'invention ne se limite pas à ce seul exemple de couleur, de sorte que la surface de couleur pourrait être de couleur claire, comme rouge, jaune ou ambre.According to another alternative embodiment of the invention, the colored surface is dark in color, for example black or black in tint. Of course, the invention is not limited to this single example of color, so that the color surface could be light in color, such as red, yellow or amber.

Selon une autre variante, la surface de couleur peut comporter plusieurs couleurs distinctives de sorte à former une impression visuelle souhaitée au niveau de la surface réfléchissante.Alternatively, the color surface may include several distinctive colors so as to form a desired visual impression at the reflective surface.

Selon une autre variante de réalisation de l'invention, la source de lumière est choisie de sorte à indiquer aux autres utilisateurs de la route, le freinage et/ou la position d'un véhicule automobile muni dudit dispositif lumineux.According to another alternative embodiment of the invention, the light source is chosen so as to indicate to other road users the braking and/or the position of a motor vehicle equipped with said light device.

Bien entendu, les différentes caractéristiques, variantes et formes de réalisation mentionnées ci-dessus peuvent être associées les unes avec les autres selon diverses combinaisons, dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres.Of course, the different characteristics, variants and embodiments mentioned above can be associated with each other in various combinations, insofar as they are not incompatible or exclusive of each other.

L'invention porte également sur un feu de signalisation comprenant un dispositif lumineux décrit ci-dessus, et aussi sur un véhicule automobile comprenant au moins un tel feu de signalisation.The invention also relates to a traffic light comprising a light device described above, and also to a motor vehicle comprising at least one such traffic light.

DESCRIPTION DES FIGURESDESCRIPTION OF FIGURES

La description qui va suivre en regard des dessins annexés suivants, donnés à titre d'exemples non limitatifs, permettra de mieux comprendre en quoi consiste l'invention et comment elle peut être réalisée :

  • la figure 1 représente une vue schématique d'une coupe transversale d'un dispositif lumineux allumé, selon l'invention ;
  • la figure 2 représente une vue schématique d'une coupe transversale du dispositif lumineux illustré à la figure 1, de jour et éteint.
The description which will follow with regard to the following appended drawings, given by way of non-limiting examples, will make it possible to better understand what the invention consists of and how it can be carried out:
  • there figure 1 represents a schematic view of a cross-section of an illuminated luminous device, according to the invention;
  • there figure 2 represents a schematic view of a cross section of the luminous device illustrated in figure 1 , day and off.

DESCRIPTION DÉTAILLÉE D'UN EXEMPLE DE RÉALISATIONDETAILED DESCRIPTION OF AN EXAMPLE OF REALIZATION

Pour rappel, l'invention propose un dispositif lumineux dont l'intérieur à la lumière du jour, est de teinte homogène et choisie par rapport aux dispositifs d'éclairage actuels.As a reminder, the invention proposes a light device whose interior, in daylight, is of homogeneous color and chosen with respect to current lighting devices.

La figure 1 illustre un exemple de réalisation non limitatif d'un dispositif lumineux 2 selon l'invention. Selon ce mode de réalisation, le dispositif lumineux 2 comprend une source de lumière 4 maintenue sur une plaque 6. La source de lumière 4 est agencée de sorte que son faisceau lumineux 8 est sensiblement parallèle à la plaque. La plaque 6 sert également de support pour un boîtier optique 10 comprenant un élément supérieur 12 et un élément inférieur 14. Il est à noter que les termes « supérieur » et « inférieur » sont choisis de façon arbitraire, et ne limitent donc pas le mode de réalisation ici décrit.There figure 1 illustrates a non-limiting embodiment of a light device 2 according to the invention. According to this embodiment, the light device 2 comprises a light source 4 held on a plate 6. The light source 4 is arranged so that its light beam 8 is substantially parallel to the plate. Plate 6 also serves as a support for an optical box 10 comprising an upper element 12 and a lower element 14. It should be noted that the terms “upper” and “lower” are chosen arbitrarily, and therefore do not limit the mode embodiment described here.

L'élément supérieur 12 du boîtier optique 10 est maintenu à la plaque 6 par l'intermédiaire d'un appendice 16A et de moyens connus. L'élément supérieur 12 comprend une partie proximale 18A, agencée en vis-à-vis de la source de lumière 4, et une partie distale 20A s'étendant jusqu'à une ouverture 22 dudit boîtier. La partie proximale 18A est recouverte d'une couche réfléchissante 24, au niveau d'une face interne 26A en vis-à-vis de l'élément inférieur 14 du boîtier optique. La couche réfléchissante 24 forme ainsi une surface réfléchissante sur laquelle le faisceau lumineux 8 émis par la source de lumière est réfléchi en direction de l'ouverture 22. Selon le présent exemple, la face interne 26A de la partie proximale 18A est de forme concave.The upper element 12 of the optical unit 10 is held to the plate 6 via an appendage 16A and known means. The upper element 12 comprises a proximal part 18A, arranged opposite the light source 4, and a distal part 20A extending as far as an opening 22 of said casing. The proximal part 18A is covered with a reflective layer 24, at the level of an internal face 26A facing the lower element 14 of the optical box. The reflective layer 24 thus forms a reflective surface on which the light beam 8 emitted by the light source is reflected in the direction of the opening 22. According to the present example, the internal face 26A of the proximal part 18A is of concave shape.

De façon avantageuse, la plaque 6 comporte un trou 28 pour permettre le passage d'une extrémité de la partie proximale 18A, afin de faciliter le positionnement du centre de courbure de la face interne 26A au niveau de la source de lumière 4. La présence du trou 28 dans la plaque 6 permet notamment de restreindre la profondeur du dispositif lumineux. Selon le présent exemple, la profondeur s'entend comme une dimension sensiblement parallèle à la direction du faisceau lumineux 8 sortant du dispositif lumineux.Advantageously, the plate 6 includes a hole 28 to allow the passage of one end of the proximal part 18A, in order to facilitate the positioning of the center of curvature of the internal face 26A at the level of the light source 4. The presence of the hole 28 in the plate 6 makes it possible in particular to restrict the depth of the light device. According to the present example, the depth is understood as a dimension substantially parallel to the direction of the light beam 8 emerging from the light device.

L'élément supérieur 12 du dispositif lumineux comporte un épaulement 30 de sorte que sa face interne 26A, au niveau de sa partie distale 20A, soit en retrait par rapport à sa partie proximale 18A. Selon le présent exemple, l'épaulement 30 délimite la partie proximale 18A de la partie distale 20A de l'élément supérieur 12. Ainsi, la hauteur du dispositif lumineux 2 peut être adaptée indépendamment de la dimension de sa partie proximale 18A. Par le terme « hauteur », on entend une dimension sensiblement normale à la profondeur du dispositif lumineux, passant par l'élément supérieur 12 et l'élément inférieur 14. La hauteur du dispositif lumineux peut alors être avantageusement choisie indépendamment de la fonction d'éclairage du dispositif lui-même, afin d'offrir des modes de réalisation susceptibles de répondre à différentes attentes, notamment des considérations esthétiques. La partie distale 20A est également recouverte au niveau de sa face interne 26A par une couche réfléchissante 24. Selon le présent exemple, la couche réfléchissante 24 est un dépôt métallique de type chrome ou aluminium, formant une surface réfléchissante au niveau de la face interne 26A de l'élément supérieur 12.The upper element 12 of the light device has a shoulder 30 so that its internal face 26A, at its distal part 20A, is recessed with respect to its proximal part 18A. According to the present example, the shoulder 30 delimits the proximal part 18A from the distal part 20A of the upper element 12. Thus, the height of the luminous device 2 can be adapted independently of the dimension of its proximal part 18A. The term "height" means a dimension substantially normal to the depth of the light device, passing through the upper element 12 and the lower element 14. The height of the light device can then be advantageously chosen independently of the function of illumination of the device itself, in order to offer embodiments likely to meet different expectations, in particular aesthetic considerations. The distal part 20A is also covered at its internal face 26A by a reflective layer 24. According to the present example, the reflective layer 24 is a metal deposit of the chromium or aluminum type, forming a reflective surface at the level of the internal face 26A of the upper element 12.

L'élément inférieur 14 du boîtier optique 10 est également maintenu à la plaque 6, par l'intermédiaire d'un appendice 16B et de moyens connus. L'élément inférieur 14 du boîtier optique comprend une partie proximale 18B, agencée comme son nom l'indique à proximité de la source de lumière 4, et une partie distale 20B s'étendant jusqu'à l'ouverture 22 délimitée par l'élément supérieur 12 et l'élément inférieur 14 du boîtier optique 10. Il est à noter que sur les figures 1 et 2, l'ouverture 22 est obturée par une lentille 32 sans que cela ne soit limitatif de l'invention. La face interne 26B de l'élément inférieur 14, se situant en vis-à-vis de l'élément supérieur 12, est de surface plane ou sensiblement plane. La face interne 26B est recouverte d'une couche de couleur 34, de sorte à présenter une surface de couleur différente par rapport à la couche réfléchissante 24. Selon le présent exemple, la surface de couleur 34 est de couleur sombre ou noire. La face interne 26B est parallèle ou sensiblement parallèle à la direction de sortie du faisceau lumineux 8 du dispositif lumineux, de manière à faire face à la couche réfléchissante 24. De préférence, l'élément inférieur 14 est agencé de sorte que la source de lumière affleure ou soit légèrement en retrait de la surface de couleur 34, afin de ne pas être visible par un observateur du dispositif lumineux 2.The lower element 14 of the optical box 10 is also held to the plate 6, via an appendix 16B and known means. The lower element 14 of the optical box comprises a proximal part 18B, arranged as its name indicates near the light source 4, and a distal part 20B extending as far as the opening 22 delimited by the element upper 12 and the lower element 14 of the optical box 10. It should be noted that on the figures 1 and 2 , the opening 22 is closed off by a lens 32 without this limiting the invention. There internal face 26B of the lower element 14, located vis-à-vis the upper element 12, has a flat or substantially flat surface. The internal face 26B is covered with a colored layer 34, so as to present a different colored surface with respect to the reflective layer 24. According to the present example, the colored surface 34 is dark or black in color. The inner face 26B is parallel or substantially parallel to the exit direction of the light beam 8 from the light device, so as to face the reflective layer 24. Preferably, the lower element 14 is arranged so that the light source flush with or slightly set back from the colored surface 34, so as not to be visible to an observer of the light device 2.

Comme illustré par la figure 2, de jour lorsque le dispositif lumineux est éteint, la couche de couleur 34 est éclairée par la lumière du jour 36, sa teinte se réfléchit alors sur la couche réfléchissante 24 ou surface réfléchissante. Il est à noter que l'observateur peut également voir la surface de couleur par l'intermédiaire de la couche réfléchissante 24, notamment au niveau de la partie proximale 18A de l'élément supérieur 12. De ce fait, un observateur regardant de jour l'intérieur du dispositif lumineux 2 à travers l'ouverture 22, perçoit une couleur de teinte relativement uniforme au niveau des faces internes 26A, 26B de l'élément supérieur et de l'élément inférieur. L'invention permet donc de modifier aisément et de façon économique la teinte de la surface réfléchissante de l'élément supérieur 12, sans qu'il soit pour cela nécessaire d'effectuer des traitements compliqués et onéreux au niveau de la couche réfléchissante 24. Autrement dit, la couche de couleur 34 ou surface de couleur permet aisément de modifier l'apparence de la teinte de l'intérieur du boîtier optique 10, lorsque le dispositif lumineux est éteint.As illustrated by the picture 2 , day when the light device is off, the color layer 34 is illuminated by daylight 36, its color is then reflected on the reflective layer 24 or reflective surface. It should be noted that the observer can also see the colored surface through the intermediary of the reflective layer 24, in particular at the level of the proximal part 18A of the upper element 12. Therefore, an observer looking at the daytime l inside the luminous device 2 through the opening 22, perceives a color of relatively uniform tint at the level of the internal faces 26A, 26B of the upper element and of the lower element. The invention therefore makes it possible to easily and economically modify the tint of the reflective surface of the upper element 12, without it being necessary for this to carry out complicated and costly treatments at the level of the reflective layer 24. Otherwise In other words, the color layer 34 or color surface easily makes it possible to modify the appearance of the tint of the interior of the optical box 10, when the luminous device is switched off.

L'invention ne se limite pas à ce seul mode de réalisation de sorte que les variantes suivantes peuvent être reproduites, de façon isolée ou bien combinée ensemble, pour réaliser de nouveaux modes de réalisation.The invention is not limited to this single embodiment so that the following variants can be reproduced, in isolation or else combined together, to produce new embodiments.

Selon une variante, la couche réfléchissante 24 peut être traitée de manière à favoriser une plus grande diffusion de la lumière afin d'offrir un dispositif lumineux de teinte plus homogène. A titre non limitatif, la surface réfléchissante peut être grainée.According to a variant, the reflective layer 24 can be treated in such a way as to promote greater diffusion of the light in order to provide a luminous device with a more homogeneous tint. As a non-limiting example, the reflective surface can be grained.

Selon une autre variante, la teinte de la surface de couleur 34 peut être proche ou similaire à celle du faisceau de lumière émis par la source de lumière 4.According to another variant, the hue of the colored surface 34 can be close to or similar to that of the beam of light emitted by the light source 4.

Selon une autre variante, la surface de couleur 34 peut comporter plusieurs teintes différentes afin de former un motif plus ou moins complexe. À titre d'exemple non limitatif, la teinte de la surface de couleur peut varier de façon progressive dans le sens de la profondeur du boîtier optique.According to another variant, the colored surface 34 can include several different shades in order to form a more or less complex pattern. By way of non-limiting example, the tint of the color surface can vary progressively in the direction of the depth of the optical housing.

Claims (11)

  1. A light device (2) for motor vehicle, comprising a light source (4), a reflective surface (24) and a colour surface (34), the reflective surface (24) having a proximal part (18A) of concave shape, close to and facing the light source (4), the proximal part (18A) making it possible to direct the light beam (8) emitted by the light source (4) outward the light device (2), the reflective surface (24) being arranged to allow an observer outside the light device (2) to view at least part of the colour surface (34) through the reflective surface (24), the colour surface (34) having a different colour than the reflective surface (24), characterized in that the light source (4) flushes with or slightly sets back from the colour surface (34), so that the light source (4) is not directly visible by an observer of the light device.
  2. The light device (2) according to the preceding claim, characterized in that the colour surface (34) is substantially parallel to the direction of the light beam (8) at the exit of the light device (2).
  3. The light device (2) according to one of the preceding claims, characterized in that the reflective surface (24) includes a distal part (20A) substantially parallel to the colour surface (34).
  4. The light device (2) according to the preceding claim, characterized in that the distal part (20A) of the reflective surface (24) faces the colour surface (34) and sets back from the proximal part (18A) of said reflective surface (24).
  5. The light device (2) according to claim 3, characterized in that the distal part (20A) of the reflective surface (24) faces a part of the colour surface (34).
  6. The light device (2) according to one of the preceding claims, characterized in that at least part of the colour surface (34) faces the proximal part (18A) of the reflective surface (24).
  7. The light device (2) according to one of the preceding claims, characterized in that the light source (4) is arranged in such a way that its light beam (8) is substantially normal to the colour surface (34), before reflection on the proximal part (18) of the reflective surface (24).
  8. The light device (2) according to one of the preceding claims, characterized in that the reflective surface (24) and/or the colour surface (34) is at least partially grained.
  9. The light device (2) according to one of the preceding claims, characterized in that the colour surface (34) is of dark colour.
  10. A signal light for motor vehicle comprising a light device (2) according to one of the preceding claims.
  11. A motor vehicle comprising at least one signal light according to the preceding claim.
EP18833476.7A 2017-12-18 2018-12-12 Light device whose interior colour is homogeneous in daylight Active EP3728940B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1762343A FR3075311B1 (en) 2017-12-18 2017-12-18 LIGHTING DEVICE WHOSE INTERIOR IS HOMOGENOUS TO DAYLIGHT
PCT/FR2018/053234 WO2019122612A1 (en) 2017-12-18 2018-12-12 Light device the interior of which is the same color as daylight

Publications (2)

Publication Number Publication Date
EP3728940A1 EP3728940A1 (en) 2020-10-28
EP3728940B1 true EP3728940B1 (en) 2023-05-17

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EP18833476.7A Active EP3728940B1 (en) 2017-12-18 2018-12-12 Light device whose interior colour is homogeneous in daylight

Country Status (4)

Country Link
EP (1) EP3728940B1 (en)
FR (1) FR3075311B1 (en)
PL (1) PL3728940T3 (en)
WO (1) WO2019122612A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020108010A1 (en) * 2020-03-24 2021-09-30 Bayerische Motoren Werke Aktiengesellschaft Lighting device for a motor vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0817043B2 (en) * 1989-09-13 1996-02-21 株式会社小糸製作所 Vehicle lighting
JP2001195911A (en) * 2000-01-12 2001-07-19 Ichikoh Ind Ltd Lamp for vehicle
ITTV20110034A1 (en) * 2011-03-04 2012-09-05 Automotive Lighting Italia Spa AUTOMOTIVE HEADLIGHT
CN106662308B (en) * 2014-07-10 2020-05-26 株式会社小糸制作所 Turn signal lamp
FR3025286A1 (en) * 2014-08-29 2016-03-04 Valeo Vision LIGHTING AND / OR SIGNALING DEVICE FOR MOTOR VEHICLE

Also Published As

Publication number Publication date
WO2019122612A1 (en) 2019-06-27
PL3728940T3 (en) 2023-08-28
EP3728940A1 (en) 2020-10-28
FR3075311A1 (en) 2019-06-21
FR3075311B1 (en) 2021-01-08

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