EP3002502A2 - Lighting device provided with dispersive surfaces, and lamp comprising such a lighting device - Google Patents

Lighting device provided with dispersive surfaces, and lamp comprising such a lighting device Download PDF

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Publication number
EP3002502A2
EP3002502A2 EP15187916.0A EP15187916A EP3002502A2 EP 3002502 A2 EP3002502 A2 EP 3002502A2 EP 15187916 A EP15187916 A EP 15187916A EP 3002502 A2 EP3002502 A2 EP 3002502A2
Authority
EP
European Patent Office
Prior art keywords
transmission surface
transmission
light
light beam
dispersive
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.)
Withdrawn
Application number
EP15187916.0A
Other languages
German (de)
French (fr)
Other versions
EP3002502A3 (en
Inventor
Pierre Albou
Loïc Boinet
Boubacar Sagna
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.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3002502A2 publication Critical patent/EP3002502A2/en
Publication of EP3002502A3 publication Critical patent/EP3002502A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/16—Laser light sources
    • 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
    • F21S43/16—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors

Definitions

  • the present invention relates to a light device provided with dispersive surfaces, especially for a motor vehicle, and a lamp provided with such a light device.
  • Motor vehicle lights are light devices that include one or more light sources and an ice that shuts the fire.
  • the light source emits light rays to form a light beam that is directed towards the ice to produce an illuminating surface that transmits light to the outside of the vehicle.
  • the color of the illuminating surface is characteristic of the function or type of fire.
  • a white illuminated surface indicates that the light is a reverse light, that an amber illuminated surface is a direction indicator, and that a red illuminated surface is a traffic light. rear position or stop lamp, the stop light being brighter.
  • fog lights which are even stronger to be visible in difficult weather conditions, such as fog, heavy rain or snow. In addition to color, these lights must meet intensity and visibility regulations.
  • the rear of a vehicle has a plurality of illuminating surfaces, each illuminating surface having a color specific to each function.
  • the light source has a light intensity chosen with respect to the type of fire.
  • Each of the illuminating surfaces being furthermore produced by at least one different light source, the number of light devices on the vehicle is multiplied.
  • the light sources are, for example, light-emitting diodes.
  • This screen aims to transmit the beam by dispersing the light rays, so that the emission angle around the emission direction of the beam is wider.
  • the direction of emission of such a beam is generally the direction of the optical axis.
  • a light whose color corresponds to the desired fire function is visible in an angularly larger area.
  • the beam is no longer concentrated around its optical axis.
  • diffraction patterns including diffraction tasks that evolve in the field of view of an observer. These tasks are troublesome for the visibility of the fire, the latter can no longer meet the regulations in force. In addition, these tasks are not aesthetic, the fire does not have a uniform illuminated surface.
  • the invention therefore aims to obtain a light device comprising a light beam that scans a screen, which improves the situation and avoids the aforementioned defects.
  • the invention relates to a light device, especially for a motor vehicle, comprising at least one light source capable of emitting light rays to form a light beam.
  • the second transmission surface attenuates the diffraction patterns generated by the first transmission surface.
  • the dispersive patterns of the first transmission surface disperse the light beam from the light source to expand the beam and meet the regulations concerning the function of fire. But they generate on the other hand diffraction tasks, especially for a coherent light.
  • the dispersive patterns of the second transmission surface make it possible to break the diffraction patterns to obtain a light device in accordance with the regulations, and which avoids unwanted aesthetic effects.
  • the device also makes it possible to use particular light sources, such as lasers.
  • Lasers emit in particular coherent light which favors the appearance of diffraction spots on a single transmission surface provided with dispersive patterns.
  • the invention also relates to a motor vehicle light comprising such a light device.
  • the Figures 1 and 2 represent an embodiment of a motor vehicle light, for example a rear light, comprising a light device 1 according to the invention.
  • the light device 1 comprises a light source 2 capable of emitting light rays to form a light beam and a first transmission surface 3 capable of transmitting light. light rays.
  • the first transmission surface 3 is for example arranged on the ice referenced 6 closing the fire.
  • the first transmission surface 3 is the inner face of the glass 6. It may also be a separate element of the lens 6, for example a transmission screen arranged in the fire in front of the lens 6.
  • the beam of light that is produced of the light source 2 is intended to illuminate the first transmission surface 3.
  • the light source 2 is a laser source comprising for example a laser diode, emitting radiation whose wavelength is chosen to obtain the color corresponding to the function of the fire on the ice 6.
  • a wavelength conversion for example a phosphor plate, in the path of the light beam, to transform the wavelength of the laser radiation and thereby obtain the desired color.
  • the light source 2 may also comprise an optical device combining in a single beam several laser rays, for example using optical fibers or devices taking advantage of the different polarizations of different laser sources.
  • the light source 2 is one or more electroluminescent diodes.
  • the device 1 is provided with an optical system 5 configured to collimate the light rays coming from the source 2 in order to form the beam of light.
  • the optical system 5 is for example a single collimation lens, and may also include a reflector.
  • the light beam can project on the transmission surface 3 a trace luminous which has a shape of point, of bigger spot, even an oblong mark.
  • the first transmission surface 3 is a dispersive surface, arranged for example on the glass 6 which closes the fire.
  • the dispersive surface comprises, for example, identical dispersive units distributed over the transmission surface 3.
  • the dispersive patterns are not identical on the first transmission surface. However, the dispersion generated by each pattern must be constant.
  • the device 1 comprises distribution means configured to distribute the light beam on the first transmission surface 3 so that it is illuminated substantially entirely.
  • the distribution means are scanning means 4 configured to ensure the scanning by the light beam of the first transmission surface 3.
  • the scanning is performed at a speed sufficiently high that the human eye does not perceive the light. moving the light trace on the first transmission surface 3, and observes a substantially constant and uniform illumination of the swept portion of the lens 6.
  • the first transmission surface 3 can advantageously be configured to have sufficient dispersion of the beam in case of malfunction of the scanning means 4. Indeed, if the scanning is interrupted, the laser beam is fixed in one direction. It is therefore necessary to ensure the safety of an observer, especially concerning his eyes, at least from a certain distance from the fire.
  • the dispersion is sufficient to ensure this safety after about fifteen centimeters, for example.
  • the light beam coming from the light source 2 is, before striking the transmission surface 3, returned by the scanning means 4 to a first mirror 7 which reflects it to a second mirror 8.
  • the second mirror 8 reflects in turn the light beam towards the transmission surface 3 of the ice 6 of the fire.
  • the two mirrors 7, 8 serve to fold the optical path of the light beam to obtain a compact fire while allowing the light beam to scan the transmission surface 3 with a near normal incidence.
  • the figure 2 represents the luminous device 1 with the path of the light beam from the light source 2 to the mirror 6.
  • the scanning means 4 are for example provided with a movable micro-mirror for scanning the transmission surface 3 by reflection of the light beam in a first direction of the transmission surface 3, which is for example horizontal.
  • the micro-mirror is driven by a periodic movement produced by an actuator (not shown). The movement of the micro-mirror is performed around an axis of rotation orthogonal to the first direction so that the light mark of the light beam sweeps the transmission surface 3 along said first direction.
  • the scanning means 4 are also configured to scan the transmission surface 3 with the light beam in a second direction.
  • the second direction is preferably substantially perpendicular to the first direction to produce a movement of the beam which moves easily on the first transmission surface 3.
  • the micro-mirror is also configured to scan the first transmission surface 3 with the light beam in the second direction.
  • the micro-mirror is the same micro-mirror which sweeps the first transmission surface 3 with the light beam in both directions.
  • the micromirror therefore follows another movement, for example rotation about a second axis of rotation perpendicular to the previous one.
  • the micro-mirror allows the light trace of the light beam to scan both horizontally and vertically the first transmission surface 3.
  • a second embodiment is to use a second micro-mirror to scan the light beam in the second direction.
  • the scanning means are provided with two micromirrors arranged one after the other on the optical path of the beam, each of which has the function of scanning the light beam with the transmission surface 3 according to a from both directions.
  • the micro-mirrors mentioned as scanning means are for example MEMS (for "Micro-Electro-Mechanical Systems” in English or microelectromechanical systems).
  • the invention is not limited to this scanning means and can use other kinds of scanning means such as a series of mirrors arranged on a rotating element, the rotation of the element generating a scanning of the transmission surface by the light beam.
  • the device comprises a second transmission surface 10 arranged to transmit to the outside of the light the light rays coming from the first transmission surface 3.
  • the first surface 3 and the second transmission surface 10 are arranged in the axis of the beam reflected by the second mirror 8.
  • the second transmission surface 10 is also provided with dispersive patterns in order to disperse a second time the light rays coming from the first transmission surface 3.
  • the second transmission surface 10 thus makes it possible to eliminate or at least greatly reduce the diffraction spots produced by the first transmission surface 3.
  • the first 3 and second 10 transmission surfaces are arranged on either side of the lens 6, that is to say on its inner face and its outer face with respect to the fire.
  • the figure 3 shows in particular the glass 6 provided on its faces on each side, first 3 and second 10 transmission surfaces.
  • the first 3 and second 10 transmission surfaces are spaced a distance d substantially equal to the thickness of the ice 6.
  • the dispersive units are preferably uniformly distributed on the transmission surfaces, and each have, for example, a pillow shape 9 having a convex curvature of constant radius of curvature, as shown in FIGS. Figures 3 to 7 .
  • the pads have a concave curvature.
  • the pads 9 are quadrilaterals whose dimensions on each side are between 0.3 and 2mm. Here, the pads are substantially square with curved sides of length 11 between 0.5 and 0.55 mm.
  • the figure 5 shows the exit face of a pad 9 whose curvature causes the deviation of the light rays passing through it. The deflection takes place at an angle ⁇ relative to the axis 13 of the pad 9.
  • the curvature of the pad 9 is chosen as a function of the angle ⁇ that is desired. The more the two transmission surfaces 3 and 10 are close, the greater the angle ⁇ must be for the dispersion to be greater.
  • the first transmission surface 3 and the second transmission surface 10 are spaced a distance d so that the light rays coming from a pad 9 of the first transmission surface 3 preferably cover at least two pads of the second surface. transmission 10 as illustrated on the figure 3 . Indeed, if the scattered radii coming from a pad 9 of the first surface 3 pass through only a pad 9 of the second transmission surface 10, the diffraction spots remain apparent after the second transmission surface 10.
  • the pads 9 of the first transmission surface 3 are preferably larger than the pads 9 of the second transmission surface 10.
  • the large bearing transmission surfaces 9 are easier to manufacture than the transmission surfaces with small bearings 9, which are on the other hand more aesthetic. Thus, since the first transmission surface is hidden, larger pads can be used.
  • said device 1 comprises a transmission screen 16 carrying the first transmission surface 3 arranged in front of the fire exit window 6. Ice 6 is provided with the second transmission surface 10 arranged on the face facing the interior of the fire. On the figure 7 of the third embodiment, the lens 6 is larger than the transmission screen 16 to avoid losing part of the light rays dispersed by the first transmission surface 3.
  • the device comprises a transmission screen 16 provided with the first 3 and second 10 transmission surfaces.
  • the ice 6 does not have dispersive patterns.
  • the dispersive patterns are protected from soiling by the ice 6 because they are inside the fire.
  • this device can advantageously be used to display pictograms, which can in particular be dynamic.
  • the distribution means are then configured to distribute the light beam on the first transmission surface so as to display the pictogram or pictograms on the second transmission surface.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un dispositif lumineux (1), notamment pour véhicule automobile, comprenant au moins une source de lumière (2) apte à émettre des rayons lumineux pour former un faisceau lumineux, et en outre : - une première surface de transmission (3) munie de motifs dispersifs, - des moyens de répartition configurés pour distribuer le faisceau lumineux sur la première surface de transmission (3), et - une deuxième surface de transmission (10) agencée de manière à transmettre les rayons lumineux provenant de la première surface de transmission (3), la deuxième surface de transmission (10) étant également munie de motifs dispersifs.The invention relates to a light device (1), especially for a motor vehicle, comprising at least one light source (2) capable of emitting light rays to form a light beam, and furthermore: a first transmission surface (3) provided with dispersive patterns, distribution means configured to distribute the light beam on the first transmission surface (3), and - A second transmission surface (10) arranged to transmit the light rays from the first transmission surface (3), the second transmission surface (10) also being provided with dispersive patterns.

Description

La présente invention concerne un dispositif lumineux muni de surfaces dispersives, notamment pour véhicule automobile, et un feu muni d'un tel dispositif lumineux.The present invention relates to a light device provided with dispersive surfaces, especially for a motor vehicle, and a lamp provided with such a light device.

Les feux de véhicule automobile, généralement situés à l'arrière du véhicule, sont des dispositifs lumineux qui comprennent une ou plusieurs sources de lumière et une glace qui ferme le feu. De façon simplifiée, la source lumineuse émet des rayons lumineux pour former un faisceau lumineux qui est dirigé vers la glace afin de produire une plage éclairante qui transmet la lumière à l'extérieur du véhicule. La couleur de la plage éclairante est caractéristique de la fonction ou du type de feu. Ainsi, on sait qu'une plage éclairante de couleur blanche indique que le feu est un feu de marche arrière, qu'une plage éclairante de couleur ambre est un indicateur de direction, et qu'une plage éclairante de couleur rouge est un feu de position arrière ou un feu stop, le feu stop étant plus lumineux. Il existe aussi les feux rouges antibrouillard, dont l'intensité est encore plus forte pour être visible dans des conditions climatiques difficiles, telles que du brouillard, des fortes pluies ou des chutes de neige. En plus de la couleur, ces feux doivent répondre à des réglementations d'intensité et de visibilité.Motor vehicle lights, generally located at the rear of the vehicle, are light devices that include one or more light sources and an ice that shuts the fire. In a simplified manner, the light source emits light rays to form a light beam that is directed towards the ice to produce an illuminating surface that transmits light to the outside of the vehicle. The color of the illuminating surface is characteristic of the function or type of fire. Thus, it is known that a white illuminated surface indicates that the light is a reverse light, that an amber illuminated surface is a direction indicator, and that a red illuminated surface is a traffic light. rear position or stop lamp, the stop light being brighter. There are also fog lights, which are even stronger to be visible in difficult weather conditions, such as fog, heavy rain or snow. In addition to color, these lights must meet intensity and visibility regulations.

Ainsi, l'arrière d'un véhicule comporte une pluralité de plages éclairantes, chaque plage éclairante ayant une couleur propre à chaque fonction. La source de lumière a une intensité lumineuse choisie par rapport au type de feu. Chacune des plages éclairantes étant en outre produite par au moins une source lumineuse différente, on multiplie le nombre de dispositifs lumineux sur le véhicule. Les sources lumineuses sont par exemple des diodes électroluminescentes.Thus, the rear of a vehicle has a plurality of illuminating surfaces, each illuminating surface having a color specific to each function. The light source has a light intensity chosen with respect to the type of fire. Each of the illuminating surfaces being furthermore produced by at least one different light source, the number of light devices on the vehicle is multiplied. The light sources are, for example, light-emitting diodes.

Si on souhaite élargir le faisceau, on peut ajouter un écran muni de motifs dispersifs. Cet écran a pour objectif de transmettre le faisceau en dispersant les rayons lumineux, de sorte que l'angle d'émission autour de la direction d'émission du faisceau est plus large. La direction d'émission d'un tel faisceau est généralement la direction de l'axe optique. Ainsi, une lumière dont la couleur correspond à la fonction du feu souhaité est visible dans une zone angulairement plus étendue. Autrement dit, après le passage par l'écran dispersif, le faisceau n'est plus concentré autour de son axe optique.If you want to expand the beam, you can add a screen with dispersive patterns. This screen aims to transmit the beam by dispersing the light rays, so that the emission angle around the emission direction of the beam is wider. The direction of emission of such a beam is generally the direction of the optical axis. Thus, a light whose color corresponds to the desired fire function is visible in an angularly larger area. In other words, after passing through the dispersive screen, the beam is no longer concentrated around its optical axis.

Cependant, si on veut utiliser un faisceau laser pour balayer un tel écran dispersif, on voit apparaître des figures de diffraction, notamment des tâches de diffraction qui évoluent dans le champ de vision d'un observateur. Ces tâches sont gênantes pour la visibilité du feu, ce dernier ne pouvant plus répondre aux réglementations en vigueur. En outre, ces tâches ne sont pas esthétiques, le feu ne présentant pas une surface éclairée uniforme.However, if we want to use a laser beam to scan such a dispersive screen, we see appearing diffraction patterns, including diffraction tasks that evolve in the field of view of an observer. These tasks are troublesome for the visibility of the fire, the latter can no longer meet the regulations in force. In addition, these tasks are not aesthetic, the fire does not have a uniform illuminated surface.

L'invention vise donc à obtenir un dispositif lumineux comprenant un faisceau lumineux qui balaie un écran, qui améliore la situation et évite les défauts précités.The invention therefore aims to obtain a light device comprising a light beam that scans a screen, which improves the situation and avoids the aforementioned defects.

Pour cela, l'invention concerne un dispositif lumineux, notamment pour véhicule automobile, comprenant au moins une source de lumière apte à émettre des rayons lumineux pour former un faisceau lumineux.For this, the invention relates to a light device, especially for a motor vehicle, comprising at least one light source capable of emitting light rays to form a light beam.

Le dispositif est remarquable en ce qu'il comporte en outre :

  • une première surface de transmission munie de motifs dispersifs,
  • des moyens de répartition configurés pour distribuer le faisceau lumineux sur la première surface de transmission, et
  • une deuxième surface de transmission agencée de manière à transmettre les rayons lumineux provenant de la première surface de transmission, la deuxième surface de transmission étant également munie de motifs dispersifs.
The device is remarkable in that it further comprises:
  • a first transmission surface provided with dispersive patterns,
  • distribution means configured to distribute the light beam on the first transmission surface, and
  • a second transmission surface arranged to transmit the light rays from the first transmission surface, the second transmission surface also being provided with dispersive patterns.

Ainsi, la deuxième surface de transmission atténue les figures de diffraction engendrées par la première surface de transmission. En effet, les motifs dispersifs de la première surface de transmission dispersent le faisceau lumineux provenant de la source de lumière pour élargir le faisceau et répondre aux réglementations concernant la fonction du feu. Mais ils génèrent en revanche des tâches de diffraction, notamment pour une lumière cohérente. Les motifs dispersifs de la deuxième surface de transmission, permettent de casser les figures de diffraction pour obtenir un dispositif lumineux conforme aux réglementations, et qui évite les effets esthétiques non souhaités.Thus, the second transmission surface attenuates the diffraction patterns generated by the first transmission surface. Indeed, the dispersive patterns of the first transmission surface disperse the light beam from the light source to expand the beam and meet the regulations concerning the function of fire. But they generate on the other hand diffraction tasks, especially for a coherent light. The dispersive patterns of the second transmission surface make it possible to break the diffraction patterns to obtain a light device in accordance with the regulations, and which avoids unwanted aesthetic effects.

Le dispositif permet en outre d'utiliser des sources de lumière particulières, tels des lasers. Les lasers émettent notamment de la lumière cohérente qui favorise l'apparition de tâches de diffraction sur une surface de transmission unique munie de motifs dispersifs.The device also makes it possible to use particular light sources, such as lasers. Lasers emit in particular coherent light which favors the appearance of diffraction spots on a single transmission surface provided with dispersive patterns.

Selon différents modes de réalisation de l'invention, qui pourront être pris ensemble ou séparément :

  • les motifs dispersifs ont une forme de coussinet présentant une courbure,
  • la courbure des coussinets est convexe,
  • les coussinets sont répartis uniformément sur la surface de transmission,
  • la courbure des coussinets présente un rayon de courbure constant,
  • les coussinets sont des quadrilatères dont les dimensions de chaque côté sont comprises entre 0.3 et 2mm,
  • la première surface de transmission et la deuxième surface de transmission sont disposées sensiblement dans l'axe du faisceau,
  • la première surface de transmission et la deuxième surface de transmission sont espacées de sorte que les rayons lumineux issus d'un coussinet de la première surface de transmission couvrent au moins deux coussinets de la deuxième surface de transmission,
  • la première surface de transmission et la deuxième surface de transmission sont identiques,
  • les coussinets de la première surface de transmission sont plus grands que les coussinets de la deuxième surface de transmission,
  • les moyens de répartition sont des moyens de balayage configurés pour balayer la première surface de transmission avec le faisceau lumineux selon une première direction et/ou selon une deuxième direction sensiblement perpendiculaire à la première direction,
  • les moyens de balayage sont munis d'un micro-miroir mobile configuré pour faire balayer la surface de transmission par le faisceau lumineux selon la première direction et/ou selon la deuxième direction,
  • la source de lumière est une diode laser,
  • ledit dispositif comprend un système optique configuré pour collimater les rayons lumineux provenant de la source de lumière pour former le faisceau lumineux,
  • ledit dispositif comprend un écran de transmission portant la première surface de transmission,
  • ledit dispositif comprend une glace portant la deuxième surface de transmission,
  • l'écran de transmission comprend également la deuxième surface de transmission.
According to various embodiments of the invention, which may be taken together or separately:
  • the dispersive patterns have a shape of a pad having a curvature,
  • the curvature of the pads is convex,
  • the bearings are evenly distributed on the transmission surface,
  • the curvature of the pads has a constant radius of curvature,
  • the pads are quadrilaterals whose dimensions on each side are between 0.3 and 2 mm,
  • the first transmission surface and the second transmission surface are disposed substantially in the beam axis,
  • the first transmission surface and the second transmission surface are spaced so that the light rays issuing from a pad of the first transmission surface cover at least two pads of the second transmission surface,
  • the first transmission surface and the second transmission surface are identical,
  • the pads of the first transmission surface are larger than the pads of the second transmission surface,
  • the distribution means are scan means configured to scan the first transmission surface with the light beam in a first direction and / or in a second direction substantially perpendicular to the first direction,
  • the scanning means are provided with a mobile micro-mirror configured to scan the transmission surface by the light beam in the first direction and / or in the second direction,
  • the light source is a laser diode,
  • said device comprises an optical system configured to collimate the light rays from the light source to form the light beam,
  • said device comprises a transmission screen carrying the first transmission surface,
  • said device comprises an ice bearing the second transmission surface,
  • the transmission screen also includes the second transmission surface.

L'invention se rapporte également à un feu de véhicule automobile comprenant un tel dispositif lumineux.The invention also relates to a motor vehicle light comprising such a light device.

L'invention sera mieux comprise à la lumière de la description suivante qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter, accompagnée des dessins joints :

  • la figure 1 illustrant de façon schématique, une vue en perspective d'un mode de réalisation d'un dispositif selon l'invention,
  • la figure 2 illustrant de façon schématique, une vue de dessus du mode de réalisation de la figure 1,
  • la figure 3 illustrant de façon schématique, un premier mode de réalisation d'agencement des surfaces de transmission,
  • la figure 4 illustrant de façon schématique, un agrandissement d'une partie d'une surface de transmission munie de coussinets,
  • la figure 5 illustrant de façon schématique, le passage de rayons lumineux dans un coussinet,
  • la figure 6 illustrant de façon schématique, un deuxième mode de réalisation d'agencement des surfaces de transmission,
  • la figure 7 illustrant de façon schématique, un troisième mode de réalisation d'agencement des surfaces de transmission,
  • la figure 8 illustrant de façon schématique, un quatrième mode de réalisation d'agencement des surfaces de transmission.
The invention will be better understood in the light of the following description which is given for information only and which is not intended to limit it, accompanied by the attached drawings:
  • the figure 1 schematically illustrating a perspective view of an embodiment of a device according to the invention,
  • the figure 2 schematically illustrating a view from above of the embodiment of the figure 1 ,
  • the figure 3 illustrating schematically a first embodiment of arrangement of the transmission surfaces,
  • the figure 4 schematically illustrating an enlargement of a portion of a transmission surface provided with bearings,
  • the figure 5 illustrating schematically the passage of light rays in a pad,
  • the figure 6 illustrating schematically a second embodiment of arrangement of the transmission surfaces,
  • the figure 7 illustrating schematically a third embodiment of arrangement of the transmission surfaces,
  • the figure 8 schematically illustrating a fourth embodiment of arrangement of the transmission surfaces.

Les figures 1 et 2 représentent un mode de réalisation d'un feu de véhicule automobile, par exemple d'un feu arrière, comprenant un dispositif lumineux 1 selon l'invention. Le dispositif lumineux 1 comprend une source de lumière 2 apte à émettre des rayons lumineux pour former un faisceau de lumière et une première surface de transmission 3 apte à transmettre les rayons lumineux. La première surface de transmission 3 est par exemple agencée sur la glace référencée 6 de fermeture du feu. Dans une première variante, représentée sur la figure 1, la première surface de transmission 3 est la face interne de la glace 6. Elle peut aussi être un élément distinct de la glace 6, par exemple un écran de transmission agencé dans le feu devant la glace 6. Le faisceau de lumière qui est issu de la source de lumière 2 est destiné à venir éclairer la première surface de transmission 3.The Figures 1 and 2 represent an embodiment of a motor vehicle light, for example a rear light, comprising a light device 1 according to the invention. The light device 1 comprises a light source 2 capable of emitting light rays to form a light beam and a first transmission surface 3 capable of transmitting light. light rays. The first transmission surface 3 is for example arranged on the ice referenced 6 closing the fire. In a first variant, represented on the figure 1 , the first transmission surface 3 is the inner face of the glass 6. It may also be a separate element of the lens 6, for example a transmission screen arranged in the fire in front of the lens 6. The beam of light that is produced of the light source 2 is intended to illuminate the first transmission surface 3.

Dans un premier mode de réalisation des figures 1 et 2, la source de lumière 2 est une source laser comprenant par exemple une diode laser, émettant un rayonnement dont la longueur d'onde est choisie pour obtenir la couleur correspondant à la fonction du feu sur la glace 6. Alternativement, on dispose un dispositif de conversion de longueur d'onde, par exemple une plaque phosphore, sur le trajet du faisceau de lumière, pour transformer la longueur d'onde du rayonnement laser et obtenir ainsi la couleur souhaitée. La source de lumière 2 peut aussi comprendre un dispositif optique combinant en un seul faisceau plusieurs rayonnements lasers, par exemple à l'aide de fibres optiques ou de dispositifs tirant profit des polarisations différentes de différentes sources laser.In a first embodiment of the Figures 1 and 2 , the light source 2 is a laser source comprising for example a laser diode, emitting radiation whose wavelength is chosen to obtain the color corresponding to the function of the fire on the ice 6. Alternatively, there is provided a wavelength conversion, for example a phosphor plate, in the path of the light beam, to transform the wavelength of the laser radiation and thereby obtain the desired color. The light source 2 may also comprise an optical device combining in a single beam several laser rays, for example using optical fibers or devices taking advantage of the different polarizations of different laser sources.

Dans un second mode de réalisation, non représenté sur les figures, la source de lumière 2 est une ou plusieurs diodes électroluminescentes.In a second embodiment, not shown in the figures, the light source 2 is one or more electroluminescent diodes.

Pour ces deux modes de réalisation, le dispositif 1 est pourvu d'un système optique 5 configuré pour collimater les rayons lumineux provenant de la source 2 afin de former le faisceau de lumière. Le système optique 5 est par exemple une lentille unique de collimation, et peut aussi comporter un réflecteur.For these two embodiments, the device 1 is provided with an optical system 5 configured to collimate the light rays coming from the source 2 in order to form the beam of light. The optical system 5 is for example a single collimation lens, and may also include a reflector.

Selon la source de lumière 2 et le système optique 5 choisis, le faisceau de lumière peut projeter sur la surface de transmission 3 une trace lumineuse qui a une forme de point, de tache plus large, voire une marque oblongue.According to the light source 2 and the optical system 5 chosen, the light beam can project on the transmission surface 3 a trace luminous which has a shape of point, of bigger spot, even an oblong mark.

Pour obtenir un éclairage sensiblement omnidirectionnel en sortie du feu arrière, la première surface de transmission 3 est une face dispersive, disposée par exemple sur la glace 6 qui ferme le feu. La face dispersive comprend par exemple des motifs dispersifs identiques répartis sur la surface de transmission 3. Ainsi, lorsque les rayons lumineux collimatés du faisceau de lumière rencontrent la première surface de transmission 3 et la traversent, ils sont dispersés de manière à élargir l'angle d'émission du faisceau.In order to obtain a substantially omnidirectional illumination at the exit of the rear light, the first transmission surface 3 is a dispersive surface, arranged for example on the glass 6 which closes the fire. The dispersive surface comprises, for example, identical dispersive units distributed over the transmission surface 3. Thus, when the collimated light rays of the light beam meet the first transmission surface 3 and pass through it, they are dispersed so as to widen the angle beam emission.

Dans une variante de réalisation, non représentée sur les figures, les motifs dispersifs ne sont pas identiques sur la première surface de transmission. Cependant, la dispersion générée par chaque motif doit être constante.In an alternative embodiment, not shown in the figures, the dispersive patterns are not identical on the first transmission surface. However, the dispersion generated by each pattern must be constant.

Dans le cas d'un faisceau étroit de type laser, le dispositif 1 comprend des moyens de répartition configurés pour distribuer le faisceau lumineux sur la première surface de transmission 3 de sorte qu'elle soit éclairée sensiblement en entier.In the case of a narrow beam of laser type, the device 1 comprises distribution means configured to distribute the light beam on the first transmission surface 3 so that it is illuminated substantially entirely.

Pour un laser, les moyens de répartition sont des moyens de balayage 4 configurés pour assurer le balayage par le faisceau lumineux de la première surface de transmission 3. Le balayage est accompli à une vitesse suffisamment grande pour que l'oeil humain ne perçoive pas le déplacement de la trace lumineuse sur la première surface de transmission 3, et observe un éclairage sensiblement constant et uniforme de la partie balayée de la glace 6.For a laser, the distribution means are scanning means 4 configured to ensure the scanning by the light beam of the first transmission surface 3. The scanning is performed at a speed sufficiently high that the human eye does not perceive the light. moving the light trace on the first transmission surface 3, and observes a substantially constant and uniform illumination of the swept portion of the lens 6.

Pour le mode de réalisation utilisant une source laser, la première surface de transmission 3 pourra avantageusement être configurée pour avoir une dispersion suffisante du faisceau en cas de disfonctionnement des moyens de balayages 4. En effet, si le balayage est interrompu, le faisceau laser est figé dans une direction. Il est donc nécessaire d'assurer la sécurité d'un observateur, notamment concernant ses yeux, au moins à partir d'une certaine distance du feu. Avantageusement, la dispersion est suffisante pour assurer cette sécurité après une quinzaine de centimètres par exemple.For the embodiment using a laser source, the first transmission surface 3 can advantageously be configured to have sufficient dispersion of the beam in case of malfunction of the scanning means 4. Indeed, if the scanning is interrupted, the laser beam is fixed in one direction. It is therefore necessary to ensure the safety of an observer, especially concerning his eyes, at least from a certain distance from the fire. Advantageously, the dispersion is sufficient to ensure this safety after about fifteen centimeters, for example.

Bien entendu, d'autres moyens de sécurité alternatifs ou complémentaires peuvent être prévus en cas de défaillances de la source laser ou du système de balayage qui générèrent un risque oculaire pour des observateurs du feu.Of course, other alternative or complementary safety means may be provided in case of failures of the laser source or the scanning system which generated an eye hazard for fire watchers.

Le faisceau lumineux provenant de la source de lumière 2 est, avant de frapper la surface de transmission 3, renvoyé par les moyens de balayage 4 sur un premier miroir 7 qui le réfléchit vers un deuxième miroir 8. Le deuxième miroir 8 réfléchit à son tour le faisceau lumineux vers la surface de transmission 3 de la glace 6 du feu. Les deux miroirs 7, 8 servent à replier le chemin optique du faisceau lumineux pour obtenir un feu compact tout en permettant au faisceau lumineux de balayer la surface de transmission 3 avec une incidence proche de la normale. La figure 2 représente le dispositif lumineux 1 avec le trajet du faisceau lumineux depuis la source de lumière 2 jusqu'à la glace 6.The light beam coming from the light source 2 is, before striking the transmission surface 3, returned by the scanning means 4 to a first mirror 7 which reflects it to a second mirror 8. The second mirror 8 reflects in turn the light beam towards the transmission surface 3 of the ice 6 of the fire. The two mirrors 7, 8 serve to fold the optical path of the light beam to obtain a compact fire while allowing the light beam to scan the transmission surface 3 with a near normal incidence. The figure 2 represents the luminous device 1 with the path of the light beam from the light source 2 to the mirror 6.

Les moyens de balayage 4 sont par exemple munis d'un micro-miroir mobile permettant de balayer la surface de transmission 3 par réflexion du faisceau lumineux selon une première direction de la surface de transmission 3, qui est par exemple horizontale. Le micro-miroir est animé d'un mouvement périodique produit par un actionneur (non représenté). Le mouvement du micro-miroir est opéré autour d'un axe de rotation orthogonal à la première direction afin que la marque lumineuse du faisceau de lumière balaye la surface de transmission 3 selon ladite première direction.The scanning means 4 are for example provided with a movable micro-mirror for scanning the transmission surface 3 by reflection of the light beam in a first direction of the transmission surface 3, which is for example horizontal. The micro-mirror is driven by a periodic movement produced by an actuator (not shown). The movement of the micro-mirror is performed around an axis of rotation orthogonal to the first direction so that the light mark of the light beam sweeps the transmission surface 3 along said first direction.

Lorsque la trace lumineuse du faisceau lumineux est petite, et a une forme de point lumineux ou de tâche, les moyens de balayage 4 sont également configurés pour balayer la surface de transmission 3 avec le faisceau lumineux selon une deuxième direction. La deuxième direction est de préférence sensiblement perpendiculaire à la première direction afin de produire un mouvement du faisceau qui se déplace aisément sur la première surface de transmission 3.When the light trace of the light beam is small, and has a shape of light spot or task, the scanning means 4 are also configured to scan the transmission surface 3 with the light beam in a second direction. The second direction is preferably substantially perpendicular to the first direction to produce a movement of the beam which moves easily on the first transmission surface 3.

Dans une première variante de réalisation des figures 1 et 2, le micro-miroir est également configuré pour balayer la première surface de transmission 3 avec le faisceau lumineux selon la deuxième direction. Autrement dit, c'est le même micro-miroir qui balaye la première surface de transmission 3 avec le faisceau lumineux selon les deux directions. Le micro-miroir suit donc un autre mouvement, par exemple de rotation autour d'un deuxième axe de rotation perpendiculaire au précédent. Ainsi, le micro-miroir permet à la trace lumineuse du faisceau lumineux de balayer à la fois horizontalement et verticalement la première surface de transmission 3.In a first variant embodiment of Figures 1 and 2 , the micro-mirror is also configured to scan the first transmission surface 3 with the light beam in the second direction. In other words, it is the same micro-mirror which sweeps the first transmission surface 3 with the light beam in both directions. The micromirror therefore follows another movement, for example rotation about a second axis of rotation perpendicular to the previous one. Thus, the micro-mirror allows the light trace of the light beam to scan both horizontally and vertically the first transmission surface 3.

Une seconde variante de réalisation, non représentée sur les figures, consiste à utiliser un deuxième micro-miroir pour faire balayer le faisceau lumineux selon la deuxième direction. Dans ce cas, les moyens de balayage sont munis de deux micro-miroirs disposés l'un à la suite de l'autre sur le chemin optique du faisceau, chacun ayant pour fonction de faire balayer au faisceau lumineux la surface de transmission 3 selon une des deux directions.A second embodiment, not shown in the figures, is to use a second micro-mirror to scan the light beam in the second direction. In this case, the scanning means are provided with two micromirrors arranged one after the other on the optical path of the beam, each of which has the function of scanning the light beam with the transmission surface 3 according to a from both directions.

Dans la description, les micro-miroirs mentionnés comme moyen de balayage sont par exemple de type MEMS (pour « Micro-Electro-Mechanical Systems » en anglais ou microsystèmes électromécaniques). Cependant, l'invention n'est nullement limitée à ce moyen de balayage et peut utiliser d'autres sortes de moyens de balayage comme par exemple une série de miroirs agencés sur un élément rotatif, la rotation de l'élément engendrant un balayage de la surface de transmission par le faisceau lumineux.In the description, the micro-mirrors mentioned as scanning means are for example MEMS (for "Micro-Electro-Mechanical Systems" in English or microelectromechanical systems). However, the invention is not limited to this scanning means and can use other kinds of scanning means such as a series of mirrors arranged on a rotating element, the rotation of the element generating a scanning of the transmission surface by the light beam.

Pour éviter ou minimiser la formation de tâches de diffraction en sortie du feu, le dispositif comprend une deuxième surface de transmission 10 agencée de manière à transmettre vers l'extérieur du feu les rayons lumineux provenant de la première surface de transmission 3. La première surface de transmission 3 et la deuxième surface de transmission 10 sont disposées dans l'axe du faisceau renvoyé par le deuxième miroir 8. La deuxième surface de transmission 10 est également munie de motifs dispersifs afin de disperser une deuxième fois les rayons lumineux venant de la première surface de transmission 3. La deuxième surface de transmission 10 permet ainsi de faire disparaître ou au moins de diminuer fortement les tâches de diffraction produites par la première surface de transmission 3.To avoid or minimize the formation of diffraction spots at the exit of the fire, the device comprises a second transmission surface 10 arranged to transmit to the outside of the light the light rays coming from the first transmission surface 3. The first surface 3 and the second transmission surface 10 are arranged in the axis of the beam reflected by the second mirror 8. The second transmission surface 10 is also provided with dispersive patterns in order to disperse a second time the light rays coming from the first transmission surface 3. The second transmission surface 10 thus makes it possible to eliminate or at least greatly reduce the diffraction spots produced by the first transmission surface 3.

Dans un premier mode de réalisation des figures 1, 2, les première 3 et deuxième 10 surfaces de transmission sont agencées de part et d'autre de la glace 6, c'est-à-dire sur sa face interne et sa face externe par rapport au feu. La figure 3 montre en particulier la glace 6 pourvue sur ses faces de chaque côté, des première 3 et deuxième 10 surfaces de transmission. Les première 3 et deuxième 10 surfaces de transmission sont espacées d'une distance d sensiblement égale à l'épaisseur de la glace 6.In a first embodiment of the Figures 1, 2 , the first 3 and second 10 transmission surfaces are arranged on either side of the lens 6, that is to say on its inner face and its outer face with respect to the fire. The figure 3 shows in particular the glass 6 provided on its faces on each side, first 3 and second 10 transmission surfaces. The first 3 and second 10 transmission surfaces are spaced a distance d substantially equal to the thickness of the ice 6.

Les motifs dispersifs sont de préférence répartis uniformément sur les surfaces de transmission, et ont par exemple chacun une forme de coussinet 9 présentant une courbure convexe de rayon de courbure constant, tel que cela est représenté sur les figures 3 à 7.The dispersive units are preferably uniformly distributed on the transmission surfaces, and each have, for example, a pillow shape 9 having a convex curvature of constant radius of curvature, as shown in FIGS. Figures 3 to 7 .

Dans une variante de réalisation, non représentée sur les figures, les coussinets présentent une courbure concave.In an alternative embodiment, not shown in the figures, the pads have a concave curvature.

Les coussinets 9 sont des quadrilatères dont les dimensions de chaque côté sont comprises entre 0.3 et 2mm. Ici, les coussinets sont sensiblement carrés avec des côtés courbes de longueur 11 comprise entre 0.5 et 0.55 mm. La figure 5 montre la face de sortie d'un coussinet 9 dont la courbure provoque la déviation des rayons lumineux la traversant. La déviation s'effectue selon un angle α par rapport à l'axe 13 du coussinet 9. La courbure du coussinet 9 est choisie en fonction de l'angle α que l'on souhaite. Plus les deux surfaces de transmission 3 et 10 sont proches, plus l'angle α doit être grand pour que la dispersion soit plus importante.The pads 9 are quadrilaterals whose dimensions on each side are between 0.3 and 2mm. Here, the pads are substantially square with curved sides of length 11 between 0.5 and 0.55 mm. The figure 5 shows the exit face of a pad 9 whose curvature causes the deviation of the light rays passing through it. The deflection takes place at an angle α relative to the axis 13 of the pad 9. The curvature of the pad 9 is chosen as a function of the angle α that is desired. The more the two transmission surfaces 3 and 10 are close, the greater the angle α must be for the dispersion to be greater.

La première surface de transmission 3 et la deuxième surface de transmission 10 sont espacées d'une distance d de sorte que les rayons lumineux issus d'un coussinet 9 de la première surface de transmission 3 couvrent de préférence au moins deux coussinets de la deuxième surface de transmission 10 comme illustré sur la figure 3. En effet, si les rayons dispersés provenant d'un coussinet 9 de la première surface 3 traversent seulement un coussinet 9 de la deuxième surface de transmission 10, les tâches de diffraction restent apparentes après la deuxième surface de transmission 10.The first transmission surface 3 and the second transmission surface 10 are spaced a distance d so that the light rays coming from a pad 9 of the first transmission surface 3 preferably cover at least two pads of the second surface. transmission 10 as illustrated on the figure 3 . Indeed, if the scattered radii coming from a pad 9 of the first surface 3 pass through only a pad 9 of the second transmission surface 10, the diffraction spots remain apparent after the second transmission surface 10.

A cette fin, les coussinets 9 de la première surface de transmission 3 sont, de préférence, plus grands que les coussinets 9 de la deuxième surface de transmission 10. De plus, les surfaces de transmission à grands coussinets 9 sont plus faciles à fabriquer que les surfaces de transmission à petits coussinets 9, qui sont en revanche plus esthétiques. Ainsi, comme la première surface de transmission est cachée, on peut utiliser des coussinets plus grands.For this purpose, the pads 9 of the first transmission surface 3 are preferably larger than the pads 9 of the second transmission surface 10. In addition, the large bearing transmission surfaces 9 are easier to manufacture than the transmission surfaces with small bearings 9, which are on the other hand more aesthetic. Thus, since the first transmission surface is hidden, larger pads can be used.

Dans les deuxième et troisième modes de réalisation représentés sur les figures 6 et 7, ledit dispositif 1 comprend un écran de transmission 16 portant la première surface de transmission 3 agencé devant la glace 6 de sortie du feu. La glace 6 est munie de la deuxième surface de transmission 10 agencée sur la face orientée vers l'intérieur du feu. Sur la figure 7 du troisième mode de réalisation, la glace 6 est plus grande que l'écran de transmission 16 pour éviter de perdre une partie des rayons lumineux dispersés par la première surface de transmission 3.In the second and third embodiments shown in the Figures 6 and 7 said device 1 comprises a transmission screen 16 carrying the first transmission surface 3 arranged in front of the fire exit window 6. Ice 6 is provided with the second transmission surface 10 arranged on the face facing the interior of the fire. On the figure 7 of the third embodiment, the lens 6 is larger than the transmission screen 16 to avoid losing part of the light rays dispersed by the first transmission surface 3.

Dans un quatrième mode de réalisation représenté sur la figure 8, le dispositif comprend un écran de transmission 16 muni des première 3 et deuxième 10 surfaces de transmission. Ici, la glace 6 ne comporte pas de motifs dispersifs. Ainsi, non seulement il suffit d'un élément unique pour supporter les deux surfaces de transmission 3, 10, mais encore, les motifs dispersifs sont protégés des salissures par la glace 6 car ils sont à l'intérieur du feu.In a fourth embodiment shown on the figure 8 , the device comprises a transmission screen 16 provided with the first 3 and second 10 transmission surfaces. Here, the ice 6 does not have dispersive patterns. Thus, not only is a single element sufficient to support the two transmission surfaces 3, 10, but also, the dispersive patterns are protected from soiling by the ice 6 because they are inside the fire.

En outre, ce dispositif peut avantageusement être utilisé pour afficher des pictogrammes, qui peuvent notamment être dynamiques. Les moyens de répartition sont alors configurés pour distribuer le faisceau lumineux sur la première surface de transmission de manière à faire apparaître le ou les pictogrammes sur la deuxième surface de transmission.In addition, this device can advantageously be used to display pictograms, which can in particular be dynamic. The distribution means are then configured to distribute the light beam on the first transmission surface so as to display the pictogram or pictograms on the second transmission surface.

Claims (18)

Dispositif lumineux (1), notamment pour véhicule automobile, comprenant au moins une source de lumière (2) apte à émettre des rayons lumineux pour former un faisceau lumineux, caractérisé en ce qu'il comporte en outre : - une première surface de transmission (3) munie de motifs dispersifs, - des moyens de répartition configurés pour distribuer le faisceau lumineux sur la première surface de transmission (3), et - une deuxième surface de transmission (10) agencée de manière à transmettre les rayons lumineux provenant de la première surface de transmission (3), la deuxième surface de transmission (10) étant également munie de motifs dispersifs. Luminous device (1), in particular for a motor vehicle, comprising at least one light source (2) capable of emitting light rays to form a light beam, characterized in that it further comprises: a first transmission surface (3) provided with dispersive patterns, distribution means configured to distribute the light beam on the first transmission surface (3), and - A second transmission surface (10) arranged to transmit the light rays from the first transmission surface (3), the second transmission surface (10) also being provided with dispersive patterns. Dispositif selon la revendication 1, caractérisé en ce que les motifs dispersifs ont une forme de coussinet (9) présentant une courbure.Device according to claim 1, characterized in that the dispersive patterns have a shape of pad (9) having a curvature. Dispositif selon la revendication 2, caractérisé en ce que les coussinets (9) sont répartis uniformément sur la surface de transmission (3, 10).Device according to claim 2, characterized in that the bearings (9) are uniformly distributed on the transmission surface (3, 10). Dispositif selon la revendication 2 ou 3, caractérisé en ce que la courbure des coussinets (9) présente un rayon de courbure constant.Device according to claim 2 or 3, characterized in that the curvature of the bearings (9) has a constant radius of curvature. Dispositif selon l'une quelconque des revendications 2 à 4, caractérisé en ce que les coussinets (9) sont des quadrilatères dont les dimensions de chaque côté sont comprises entre 0.3 et 2mm.Device according to any one of claims 2 to 4, characterized in that the pads (9) are quadrilaterals whose dimensions on each side are between 0.3 and 2mm. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la première surface de transmission (3) et la deuxième surface de transmission (10) sont disposées sensiblement dans l'axe du faisceau.Device according to any one of the preceding claims, characterized in that the first transmission surface (3) and the second transmission surface (10) are arranged substantially in the beam axis. Dispositif selon l'une quelconque des revendications 2 à 6, caractérisé en ce que la première surface de transmission (3) et la deuxième surface de transmission (10) sont espacées de sorte que les rayons lumineux issus d'un coussinet (9) de la première surface de transmission (3) couvrent au moins deux coussinets (9) de la deuxième surface de transmission (10).Device according to any one of claims 2 to 6, characterized in that the first transmission surface (3) and the second transmission surface (10) are spaced apart so that the light rays coming from a bearing (9) of the first transmission surface (3) covers at least two bearings (9) of the second transmission surface (10). Dispositif selon l'une quelconque des revendications 2 à 7, caractérisé en ce que la première surface de transmission (3) et la deuxième surface de transmission (10) sont identiques.Device according to any one of claims 2 to 7, characterized in that the first transmission surface (3) and the second transmission surface (10) are identical. Dispositif selon l'une quelconque des revendications 2 à 8, caractérisé en ce que les coussinets (9) de la première surface de transmission (3) sont plus grands que les coussinets (9) de la deuxième surface de transmission (10).Device according to one of Claims 2 to 8, characterized in that the bearings (9) of the first transmission surface (3) are larger than the bearings (9) of the second transmission surface (10). Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de répartition sont des moyens de balayage (4) configurés pour balayer la première surface de transmission avec le faisceau lumineux selon une première direction et/ou selon une deuxième direction sensiblement perpendiculaire à la première direction.Device according to any one of the preceding claims, characterized in that the distribution means are scanning means (4) configured to scan the first transmission surface with the light beam in a first direction and / or in a second direction substantially perpendicular to the first direction. Dispositif selon la revendication 10, caractérisé en ce que les moyens de balayage (4) sont munis d'un micro-miroir mobile configuré pour faire balayer la surface de transmission (3, 10) par le faisceau lumineux selon la première direction et/ou selon la deuxième direction.Device according to claim 10, characterized in that the scanning means (4) are provided with a movable micro-mirror configured to scan the transmission surface (3, 10) by the light beam in the first direction and / or according to the second direction. Dispositif selon la revendication 10, caractérisé en ce que les moyens de balayage (4) sont munis de deux micro-miroirs configurés pour faire balayer chacun la surface de transmission (3, 10) par le faisceau lumineux respectivement selon la première direction et selon la deuxième direction.Device according to claim 10, characterized in that the scanning means (4) are provided with two micro-mirrors configured to scan each the transmission surface (3, 10) by the light beam respectively in the first direction and according to the second direction. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la source de lumière (2) est une diode laser.Device according to one of the preceding claims, characterized in that the light source (2) is a laser diode. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un système optique (5) configuré pour collimater les rayons lumineux provenant de la source de lumière (2) pour former le faisceau lumineux.Device according to any one of the preceding claims, characterized in that it comprises an optical system (5) configured to collimate the light rays coming from the light source (2) to form the light beam. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un écran de transmission (16) portant la première surface de transmission (3).Device according to any one of the preceding claims, characterized in that it comprises a transmission screen (16) carrying the first transmission surface (3). Dispositif selon la revendication précédente, caractérisé en ce qu'il comprend une glace (6) portant la deuxième surface de transmission (10).Device according to the preceding claim, characterized in that it comprises an ice (6) carrying the second transmission surface (10). Dispositif selon la revendication 15, caractérisé en ce que l'écran de transmission (16) comprend également la deuxième surface de transmission (10).Device according to claim 15, characterized in that the transmission screen (16) also comprises the second transmission surface (10). Feu de véhicule automobile comprenant un dispositif lumineux (1) selon l'une quelconque des revendications précédentes.Motor vehicle light comprising a light device (1) according to any one of the preceding claims.
EP15187916.0A 2014-10-02 2015-10-01 Lighting device provided with dispersive surfaces, and lamp comprising such a lighting device Withdrawn EP3002502A3 (en)

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FR1459441A FR3026817A1 (en) 2014-10-02 2014-10-02 LUMINOUS DEVICE PROVIDED WITH DISPERSIVE SURFACES, AND FIRE COMPRISING SUCH A LUMINOUS DEVICE

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FR3026817A1 (en) 2016-04-08

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