EP2998645B1 - Lighting device of a vehicle using a multi-source optical lens - Google Patents

Lighting device of a vehicle using a multi-source optical lens Download PDF

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Publication number
EP2998645B1
EP2998645B1 EP15184928.8A EP15184928A EP2998645B1 EP 2998645 B1 EP2998645 B1 EP 2998645B1 EP 15184928 A EP15184928 A EP 15184928A EP 2998645 B1 EP2998645 B1 EP 2998645B1
Authority
EP
European Patent Office
Prior art keywords
exit surface
elementary
light
module
segment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15184928.8A
Other languages
German (de)
French (fr)
Other versions
EP2998645A2 (en
EP2998645A3 (en
Inventor
Jean-Luc Meyrenaud
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
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Valeo Vision SAS
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Publication date
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Publication of EP2998645A2 publication Critical patent/EP2998645A2/en
Publication of EP2998645A3 publication Critical patent/EP2998645A3/en
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Publication of EP2998645B1 publication Critical patent/EP2998645B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • 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
    • F21S41/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/26—Elongated lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/27—Thick lenses
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching 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
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/249—Light guides with two or more light sources being coupled into the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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
    • F21S43/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/27—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device

Definitions

  • the invention relates to a vehicle lighting device using a multi-source optical lens.
  • Lighting devices intended to be mounted in vehicle headlights exist and have already been the subject of patents.
  • Each assembly comprises a light source which is mounted on a substrate supplying current to said source, and a lens associated with said source. All the light emitted by this light source is transmitted to an output diopter of the lens, via a conduit, the cross section of which increases progressively from said source to said output diopter.
  • the output diopter has a D shape and allows the light beams from the light source to be transmitted in the same direction.
  • the lighting device described in this document is therefore modular, since it can be made up of a variable number of unit assemblies, depending on the lighting needs encountered. Such a device nevertheless has the drawback of using several unit assemblies and therefore several separate lenses, requiring a certain mounting complexity, and generating additional costs associated with the manufacture of several lenses.
  • a lighting device has the character of modularity, through the use of several light sources, while overcoming the drawbacks noted in the state of the art.
  • the first subject of the invention is a part made of transparent material according to claim 1.
  • this piece of transparent material is intended for use in a lighting device, in combination with light sources placed at the level of the input surfaces, so as to obtain a resulting light beam coming from the output surfaces, without no stray light interference.
  • the means for separating the room thus make it possible to divide said room into several distinct portions, constituting separate lighting sources, having no light interaction between them.
  • this part may include a variable number of elementary portions, each having their specific structural and optical characteristics.
  • each entry surface is planar and each exit surface is curved.
  • the exit surfaces of the elementary portions are contiguous, so as to form a resulting exit surface of the part, which is continuous.
  • each exit surface is focused at the level of the entrance surface of the same portion, means that there is a point or a horizontal segment in the vicinity of the entrance surface such that a majority of the rays coming from this point or from the points of the line emerge from the exit surface while being parallel to the same plane.
  • the means are constituted by walls originating at the level of each inlet surface and extending towards the corresponding outlet surface. These walls are arranged to reflect the light beams coming from the input surfaces, and not to transmit them to the output surfaces of the adjacent elementary portions.
  • each wall extends towards an edge delimiting the exit surface.
  • the elementary portions are aligned, the two inlet surfaces of the two elementary end portions being bordered by a single wall, and the inlet surfaces of the other elementary portions each being bordered by two walls.
  • each of the two elementary end portions has a single wall to prevent the beams coming from its inlet surface from passing through the outlet surface of the single adjacent elementary portion.
  • the other elementary portions being framed by two adjacent elementary portions therefore need two walls to prevent the beams coming from their inlet surfaces, from passing through the outlet surface of said two adjacent elementary portions.
  • each wall has a curved profile.
  • the walls are not strictly flat. This is a curvature of low amplitude, not influencing the direction of overall expansion of said wall.
  • the part has several hollows each delimited by a wall of an elementary portion and a wall of the adjacent elementary portion.
  • said part has an optimized geometry so that its weight and size are as small as possible.
  • each hollow has a rounded bottom.
  • the two walls of the two adjacent elementary portions defining a hollow meet by means of a curved segment.
  • the walls are aluminized.
  • each of said walls can effectively reflect the light beams coming from the entrance surface to make them converge towards the exit surface of the same elementary portion.
  • the part is made of a material to be chosen from among glass, polycarbonate and PMMA ( standing for Polymethyl de Methacrylate).
  • the exit surface and the entrance surface of the same portion are opposite each other.
  • each exit surface is convex with respect to the outside of the part.
  • the overall exit surface is convex with respect to the outside of the part.
  • the second object of the invention is a light module, comprising a part made of transparent material in accordance with the invention, a substrate and at least three light sources implanted in said substrate, said sources illuminating the input surfaces of three adjacent elementary portions, the beams coming from an entrance surface being able to pass only through the exit surface of the same elementary portion, the separation means preventing said beams from passing through the exit surface of the adjacent elementary portion.
  • a light module makes it possible to emit a resulting light beam, coming from the output surfaces, having several components each coming from an elementary portion of the part made of transparent material, said beam being devoid of any parasitic signal due. to light interference between said elementary portions.
  • This module can for example be installed in a vehicle headlight to obtain code type lighting, or daytime signaling of said vehicle. Said module can also be installed in the passenger compartment of a vehicle to provide a less intense lighting function, for the attention of the passengers.
  • each light source is constituted by a light emitting diode.
  • a light emitting diode offers a good quality of light beam, while remaining of a reduced size. It is therefore perfectly suited to a light module according to the invention, the dimensions of which must be limited in order to be able to be, for example, incorporated into a motor vehicle.
  • the substrate has a surface for implantation of light sources, said surface having a central projection, so that the light sources placed at the level of the end zones of said surface are found set back from those placed on said surface. advanced by relative to the direction of emission of light by said sources.
  • each light source placed at an entry surface of an elementary end portion is found further from the exit surface of the same elementary portion, than are the light sources placed at the level. input surfaces of the elementary portions intermediate with respect to their corresponding output surfaces.
  • the end light sources will be able to provide intense illumination focusing on the range, while the intermediate light sources will provide spread illumination focusing on the width.
  • said module has two light sources each placed in an end zone of the implantation surface of the substrate, and three light sources placed at the level of the projection. , said five sources being aligned in front view and emitting light in the same direction.
  • the two end light sources would be designed to provide intense illumination focusing on the range, and the three intermediate light sources would provide illumination having a large width.
  • the light sources are LEDs comprising at least one photoemissive element, at least one light source whose edges of the photoemissive element have, in front view, an orientation different from those of another LED.
  • the implantation surface of the substrate has a recess suitable for receiving an electronic card.
  • This card will be used to supply the light sources of the module with electric current.
  • the electronic card is provided with an electrical connector.
  • a light module according to the invention comprises a radiator for cooling the light sources.
  • the radiator comprises the substrate.
  • the radiator forms a single piece.
  • the radiator is made of metal.
  • the third subject of the invention is a vehicle lighting device comprising at least one light module in accordance with the invention.
  • the rays emitted by the module at the output of the overall output surface of the module form a portion or all of a beam of road lighting, signaling, or passenger compartment lighting.
  • the luminous device can be devoid of lens, reflector or mask after the overall exit surface.
  • a light module according to the invention has the advantage of using a single piece of transparent material, and intended to be used with several light sources, to fulfill a specific lighting or signaling function. Since the transparent part has a compact geometry, said module has the advantage of being compact. It also has the advantage of generating moderate costs, avoiding having to machine several lenses, each dedicated to a particular lighting and / or signaling function. It also has the advantage of being able to produce a great variability of light beams according to the number and the location of the associated light sources, to meet different lighting needs and requirements. Finally, a light module according to the invention has the advantage of being particularly suitable for a motor vehicle, in which the light beams are necessary, whether at the headlamps to ensure a lighting function of the vehicle. road or signaling, or at the level of the passenger compartment to provide lighting for the attention of passengers.
  • a light module 1 according to the invention comprises a radiator 2 connected to a substrate 3, an electronic card 4 provided with an electrical connector 5, five light-emitting diodes 6 which will be called LEDs for the remainder of the description, a part 7 in transparent material according to the invention and a housing 8 for protection and maintenance, able to come to grip said transparent part 7.
  • the box 8 is fixed to the substrate 3 by means of a first series of screws 9.
  • the electronic card 4 is anchored in the substrate 3 by means of a second series of screws 10.
  • Such a module 1 is intended to be fixed. , for example, inside a vehicle headlight.
  • the part 7 made of transparent material according to the invention is solid and is made of PVC (polyvinyl chloride), and acts as an optical lens.
  • This part schematically comprises two side tabs 11, 12 and a central body 13 located between said tabs 11, 12 and in a position offset relative to them.
  • Said body 13 is bordered by two end arms 14, 15, each connected to a tab 11, 12, each of said arms 14, 15 extending in a direction which is perpendicular to that of the tab 11, 12 to which it is connected.
  • the two legs 11, 12 are strictly aligned, so that the transparent part 7 can bear against a flat surface, by means of these tabs 11, 12.
  • the body 13 of this part 7 is divided into five elementary portions 16, 17, 18, 19, 20, each characterized by a solid surface inlet 21, 22, 23, 24, 25 and by an outlet surface 26, 27, 28, 29, 30. These five portions 16, 17, 18, 19, 20 are substantially aligned in the same direction, which is that according to which the two legs 11, 12 are connected.
  • This transparent part 7 thus has two elementary end portions 16, 17, materialized by the two end arms 14, 15, and three intermediate elementary portions 18, 19, 20 positioned between said end portions 16, 17 .
  • the five exit surfaces 26, 27, 28, 29, 30 are contiguous, to form an overall exit surface of said part 7, which is continuous.
  • These five outlet surfaces 26, 27, 28, 29, 30 constitute the most advanced part of the body 13 with respect to the two lateral legs 11, 12.
  • the five inlet surfaces 21, 22, 23, 24, 25 are separated.
  • Each portion 16, 17, 18, 19, 20 is elongated, the inlet surface 21, 22, 23, 24, 25 and the surface of outlet 26, 27, 28, 29, 30 constituting the two ends of each of said portions 16, 17, 18, 19, 20 along their longitudinal axis.
  • the three intermediate elementary portions 18, 19, 20 each have two walls 31, 32, 33, 34, 35, 36 originating at the level of the entry surface 23, 24, 25 and extending towards two edges delimiting the surface. output 28, 29, 30 of the same portion 18, 19, 20.
  • These walls 31, 32, 33, 34, 35, 36 which can for example be aluminized, are intended to prevent the beams produced by a light source placed at an entrance surface 23, 24, 25 of a portion 18, 19, 20, to pass through the exit surface of an adjacent portion.
  • the two end elementary portions 16, 17 have only one wall 37, 38 intended to prevent a light source placed at the level of the entrance surface 21, 22, of one of them, from irradiating. an exit surface of an adjacent elementary portion, since each of said end portions 16, 17 has only one adjacent elementary portion.
  • the walls 31, 32, 33, 34, 35, 36, 37, 38 of two elementary portions 16, 17, 18, 19, 20 are joined together by means of a curved wall segment.
  • the transparent part 7 thus presents a series of four hollows 39, 40, 41, 42 aligned alternately with the five elementary portions 16, 17, 18, 19, 20, each hollow being thus delimited by a wall of an elementary portion and by a wall of 'an adjacent elementary portion.
  • the two entry surfaces 21, 22 of the two elementary end portions 16, 17 are set back from the entry surfaces 23, 24, 25 of the three intermediate elementary portions 18, 19, 20.
  • the inlet surfaces 21, 22, 23, 24, 25 are parallel and the outlet surfaces 26, 27, 28, 29, 30 are rounded in shape.
  • the transparent part 7 is not rectilinear.
  • the side legs 11, 12 are parallel and are interconnected by the body 13, which is materialized by a rectilinear segment and inclined relative to the two legs 11, 12, at an angle of less than 10 °.
  • this part 7 includes a right side (DR) and a left side (GA).
  • the radiator 2 and the substrate 3 constitute a single piece of metal.
  • the substrate 3 can be likened to a thin plate having an implantation face 43 provided with a recess 44 whose contour is similar to that of the electronic card 4, said recess 44 being intended to receive said card 4.
  • This face 43 has a central protuberance 45 partially bordering the recess 44 and contributing to partially enlarging the edge surrounding said recess 44.
  • the five LEDs 6 are secured to the face 43 of the substrate 3, which is provided with the recess 44, at an area outside said recess 44.
  • the five LEDs 6 are arranged along the edge delimiting the recess 44, three LEDs 6 being placed on the protuberance 45 and the two other LEDs 6 being placed at the level of the face 43 of the substrate 3 located at a lower altitude than that of said protuberance 45. In this way, two end LEDs 6 frame three intermediate LEDs 6, raised.
  • Each LED 6 has an element photoemissive similar to a square object and having a low thickness.
  • the five LEDs 6 are turned differently compared to the forward direction, that is to say the direction of emission of the module. In other words, when viewed from the front, these LEDs have different orientations. For example in projection onto a projection plane located in front of the LEDs and perpendicular to the optical or main emission axis of the light module, these LEDs have different orientations within said projection plane. Thus, two LEDs can be arranged so that the edges of their photoemissive elements have, in front view, a different orientation. These edges may, in front view, form an angle of 45 ° with each other. These five LEDs 6 are arranged to emit a light beam in the same direction.
  • the transparent part 7 is fixed on the substrate 3 so that each of the five LEDs 6 secured to said substrate 3, comes to be positioned at an entrance surface 21, 22, 23, 24, 25 of said part 7. More precisely, the LEDs 6 are found outside the elementary portions 16, 17, 18, 19, 20 of the part 7, so that each LED 6 can send light beams towards the inlet surface 21, 22, 23, 24, 25 with which it is associated, said beams passing through said inlet surface 21, 22, 23, 24, 25 and then passing through the outlet surface 26, 27, 28, 29, 30 of the same portion.
  • the light beams coming from each input surface 21, 22, 23, 24, 25 can either directly reach the corresponding output surface 26, 27, 28, 29, 30, or be reflected beforehand on the walls 31 , 32, 33, 34, 35, 36, 37, 38 before arriving on said exit surface 26, 27, 28, 29, 30.
  • the walls 31, 32, 33, 34, 35, 36, 37, 38 prevent the light beams emitted by an LED 6 placed at an elementary portion 16, 17, 18, 19, 20, from reaching the exit surface 26, 27, 28, 29, 30 of a portion adjacent elementary 16, 17, 18, 19, 20.
  • the elementary portions 16, 17, 18, 19, 20 act separately and autonomously, with the aim of obtaining a resulting light beam, without parasitic interference.
  • the housing 8 is screwed onto said substrate 3 by partially covering said transparent part 7.
  • the figures 5A to 9B illustrate an example of use of a light module 1 according to the invention, by breaking down the resulting light beam, into several components each coming from an elementary portion 16, 17, 18, 19, 20, of said module 1 associated with the Corresponding LED 6.
  • the elementary end portion 16 located to the left of the module 1 and associated with the corresponding end LED 6, can be used to produce left range lighting. This lighting is rather concentrated and intense.
  • the left intermediate elementary portion 18, associated with the corresponding LED 6, can be used to produce lighting extended horizontally to the left. This lighting is rather weak and spread out transversely to the vehicle.
  • the central intermediate elementary portion 19, associated with the corresponding LED 6, can be used to produce illumination extended horizontally as much to the right as to the left. This lighting is rather weak and spread out transversely to the vehicle.
  • the left intermediate elementary portion 20, associated with the corresponding LED 6, can be used to produce lighting extended horizontally towards the left. This lighting is rather weak and spread out transversely to the vehicle.
  • the elementary end portion 17 located to the left of the module 1 and associated with the corresponding end LED 6, can be used to produce a left range lighting, inclined at an angle of 15 ° to a horizontal axis. This lighting is rather concentrated and intense.
  • a light module 1 is capable of producing a resulting light beam, which is sharp and precise, because devoid of any parasitic light beams due to light interference between the different elementary portions 16, 17, 18, 19, 20 of said module 1.
  • LEDs all bear the same reference in the description, in this case the number 6, they can naturally have different structural, geometric and light characteristics within the same light module 1, said LEDs 6 being chosen according to specific lighting needs.

Description

L'invention se rapporte à un dispositif d'éclairage d'un véhicule utilisant une lentille optique multi sources.The invention relates to a vehicle lighting device using a multi-source optical lens.

Des dispositifs d'éclairage destinés à être montés dans des projecteurs de véhicule, existent et ont déjà fait l'objet de brevets. On peut, par exemple, citer la demande de brevet US2007/0120137 qui se rapporte à un dispositif d'éclairage multi sources, comprenant une multiplicité d'assemblages unitaires et distincts. Chaque assemblage comprend une source lumineuse qui est monté sur un substrat fournissant du courant à ladite source, et une lentille associée à ladite source. Toute la lumière émise par cette source lumineuse est transmise à un dioptre de sortie de la lentille, via un conduit dont la section transversale croît progressivement de ladite source vers ledit dioptre de sortie. Le dioptre de sortie a une forme en D et permet de transmettre les faisceaux lumineux issus de la source lumineuse, dans une même direction. Le dispositif d'éclairage décrit dans ce document est donc modulaire, car il peut être constitué d'un nombre variable d'assemblages unitaires, en fonction des besoins d'éclairage rencontrés. Un tel dispositif présente néanmoins l'inconvénient de mettre en œuvre plusieurs assemblages unitaires et donc plusieurs lentilles séparées, nécessitant une certaine complexité de montage, et engendrant des surcoûts liés à la fabrication de plusieurs lentilles.Lighting devices intended to be mounted in vehicle headlights exist and have already been the subject of patents. We can, for example, cite the patent application US2007 / 0120137 which relates to a multi-source lighting device, comprising a multiplicity of unitary and distinct assemblies. Each assembly comprises a light source which is mounted on a substrate supplying current to said source, and a lens associated with said source. All the light emitted by this light source is transmitted to an output diopter of the lens, via a conduit, the cross section of which increases progressively from said source to said output diopter. The output diopter has a D shape and allows the light beams from the light source to be transmitted in the same direction. The lighting device described in this document is therefore modular, since it can be made up of a variable number of unit assemblies, depending on the lighting needs encountered. Such a device nevertheless has the drawback of using several unit assemblies and therefore several separate lenses, requiring a certain mounting complexity, and generating additional costs associated with the manufacture of several lenses.

Chacun des documents EP2525142 A2 , JP2004362840 A , EP2693113 A1 divulgue un dispositif d'éclairage connu.Each of the documents EP2525142 A2 , JP2004362840 A , EP2693113 A1 discloses a known lighting device.

Un dispositif d'éclairage selon l'invention présente un caractère de modularité, à travers l'utilisation de plusieurs sources lumineuses, tout en s'affranchissant des inconvénients relevés dans l'état de la technique.A lighting device according to the invention has the character of modularity, through the use of several light sources, while overcoming the drawbacks noted in the state of the art.

L'invention a pour premier objet une pièce en matériau transparent selon la revendication 1.The first subject of the invention is a part made of transparent material according to claim 1.

De cette manière, cette pièce en matériau transparent est destinée à être utilisée dans un dispositif lumineux, en combinaison avec des sources lumineuses placées au niveau des surfaces d'entrée, de manière à obtenir un faisceau de lumière résultant issu des surfaces de sortie, sans aucune interférence lumineuse parasite. Autrement dit, les moyens de séparation de la pièce permettent ainsi de diviser ladite pièce en plusieurs portions distinctes, constituant des sources d'éclairage dissociées, n'ayant aucune interaction lumineuse entre elles. En fonction des besoins d'éclairage rencontrés, cette pièce peut comporter un nombre variable de portions élémentaires, ayant chacune leurs caractéristiques structurelles et optiques, spécifiques. De façon avantageuse, chaque surface d'entrée est plane et chaque surface de sortie est incurvée. Selon l'invention, les surfaces de sortie des portions élémentaires sont jointives, de manière à former une surface de sortie résultante de la pièce, qui est continue.In this way, this piece of transparent material is intended for use in a lighting device, in combination with light sources placed at the level of the input surfaces, so as to obtain a resulting light beam coming from the output surfaces, without no stray light interference. In other words, the means for separating the room thus make it possible to divide said room into several distinct portions, constituting separate lighting sources, having no light interaction between them. Depending on the lighting needs encountered, this part may include a variable number of elementary portions, each having their specific structural and optical characteristics. Advantageously, each entry surface is planar and each exit surface is curved. According to the invention, the exit surfaces of the elementary portions are contiguous, so as to form a resulting exit surface of the part, which is continuous.

Selon une réalisation de l'invention, le fait que chaque surface de sortie est focalisée au niveau de la surface d'entrée de la même portion, signifie qu'il existe un point ou un segment horizontal au voisinage de la surface d'entrée tel qu'une majorité des rayons issus de ce point ou des points de la ligne ressortent de la surface de sortie en étant parallèle à un même plan.According to one embodiment of the invention, the fact that each exit surface is focused at the level of the entrance surface of the same portion, means that there is a point or a horizontal segment in the vicinity of the entrance surface such that a majority of the rays coming from this point or from the points of the line emerge from the exit surface while being parallel to the same plane.

Selon l'invention, les moyens sont constitués par des parois prenant naissance au niveau de chaque surface d'entrée et s'étendant vers la surface de sortie correspondante. Ces parois sont agencées pour réfléchir les faisceaux lumineux en provenance des surfaces d'entrée, et non pas pour les transmettre vers les surfaces de sorties des portions élémentaires adjacentes.According to the invention, the means are constituted by walls originating at the level of each inlet surface and extending towards the corresponding outlet surface. These walls are arranged to reflect the light beams coming from the input surfaces, and not to transmit them to the output surfaces of the adjacent elementary portions.

De façon avantageuse, chaque paroi s'étend vers un bord délimitant la surface de sortie.Advantageously, each wall extends towards an edge delimiting the exit surface.

Selon l'invention, les portions élémentaires sont alignées, les deux surfaces d'entrée des deux portions élémentaires d'extrémité étant bordées par une seule paroi, et les surfaces d'entrée des autres portions élémentaires étant chacune bordée par deux parois. En effet, chacune des deux portions élémentaires d'extrémité possède une seule paroi pour empêcher les faisceaux issus de sa surface d'entrée, de passer par la surface de sortie de la seule portion élémentaire adjacente. Les autres portions élémentaires étant encadrées par deux portions élémentaires adjacentes, ont donc besoin de deux parois pour empêcher les faisceaux issus de leurs surfaces d'entrée, de passer par la surface de sortie desdites deux portions élémentaires adjacentes.According to the invention, the elementary portions are aligned, the two inlet surfaces of the two elementary end portions being bordered by a single wall, and the inlet surfaces of the other elementary portions each being bordered by two walls. In fact, each of the two elementary end portions has a single wall to prevent the beams coming from its inlet surface from passing through the outlet surface of the single adjacent elementary portion. The other elementary portions being framed by two adjacent elementary portions, therefore need two walls to prevent the beams coming from their inlet surfaces, from passing through the outlet surface of said two adjacent elementary portions.

Préférentiellement, chaque paroi présente un profil incurvé. En effet, les parois ne sont pas rigoureusement planes. Il s'agit d'une incurvation de faible amplitude, n'influant pas sur le sens d'expansion globale de ladite paroi.Preferably, each wall has a curved profile. Indeed, the walls are not strictly flat. This is a curvature of low amplitude, not influencing the direction of overall expansion of said wall.

De façon avantageuse, la pièce présente plusieurs creux délimités chacun par une paroi d'une portion élémentaire et une paroi de la portion élémentaire adjacente. De cette manière, ladite pièce présente une géométrie optimisée pour que son poids et son encombrement soient les plus réduits possible.Advantageously, the part has several hollows each delimited by a wall of an elementary portion and a wall of the adjacent elementary portion. In this way, said part has an optimized geometry so that its weight and size are as small as possible.

Avantageusement, chaque creux possède un fond arrondi. Autrement dit, les deux parois des deux portions élémentaires adjacentes délimitant un creux, se rejoignent au moyen d'un segment incurvé.Advantageously, each hollow has a rounded bottom. In other words, the two walls of the two adjacent elementary portions defining a hollow, meet by means of a curved segment.

De façon préférentielle, les parois sont aluminées. De cette manière, chacune desdites parois peut réfléchir efficacement les faisceaux lumineux en provenance de la surface d'entrée pour les faire converger vers la surface de sortie de la même portion élémentaire.Preferably, the walls are aluminized. In this way, each of said walls can effectively reflect the light beams coming from the entrance surface to make them converge towards the exit surface of the same elementary portion.

Préférentiellement, la pièce est réalisée dans un matériau à choisir parmi du verre, du polycarbonate et du PMMA (de l'anglais Polymethyl de Methacrylate) . Preferably, the part is made of a material to be chosen from among glass, polycarbonate and PMMA ( standing for Polymethyl de Methacrylate).

De façon avantageuse, la surface de sortie et la surface d'entrée d'une même portion sont en vis-à-vis.Advantageously, the exit surface and the entrance surface of the same portion are opposite each other.

Avantageusement, chaque surface de sortie est convexe par rapport à l'extérieur de la pièce.Advantageously, each exit surface is convex with respect to the outside of the part.

De façon préférentielle, la surface globale de sortie est convexe par rapport à l'extérieur de la pièce.Preferably, the overall exit surface is convex with respect to the outside of the part.

L'invention a pour deuxième objet un module lumineux, comprenant une pièce en matériau transparent conforme à l'invention, un substrat et au moins trois sources lumineuses implantées dans ledit substrat, lesdites sources éclairant les surfaces d'entrées de trois portions élémentaires adjacentes, les faisceaux issus d'une surface d'entrée ne pouvant passer que par la surface de sortie de la même portion élémentaire, les moyens de séparation empêchant lesdits faisceaux de passer par la surface de sortie de la portion élémentaire adjacente. De cette manière, un tel module lumineux permet d'émettre un faisceau lumineux résultant, issu des surfaces de sortie, possédant plusieurs composantes en provenance chacune d'une portion élémentaire de la pièce en matériau transparent, ledit faisceau étant dépourvu de tout signal parasite dû à des interférences lumineuses entre lesdites portions élémentaires. Ce module peut par exemple être implanté dans un projecteur avant de véhicule pour obtenir un éclairage de type code, ou une signalisation de jour dudit véhicule. Ledit module peut également être implanté dans l'habitacle d'un véhicule pour assurer une fonction d'éclairage moins intense, à l'attention des passagers.The second object of the invention is a light module, comprising a part made of transparent material in accordance with the invention, a substrate and at least three light sources implanted in said substrate, said sources illuminating the input surfaces of three adjacent elementary portions, the beams coming from an entrance surface being able to pass only through the exit surface of the same elementary portion, the separation means preventing said beams from passing through the exit surface of the adjacent elementary portion. In this way, such a light module makes it possible to emit a resulting light beam, coming from the output surfaces, having several components each coming from an elementary portion of the part made of transparent material, said beam being devoid of any parasitic signal due. to light interference between said elementary portions. This module can for example be installed in a vehicle headlight to obtain code type lighting, or daytime signaling of said vehicle. Said module can also be installed in the passenger compartment of a vehicle to provide a less intense lighting function, for the attention of the passengers.

Avantageusement, chaque source lumineuse est constituée par une diode électroluminescente. Une telle diode propose une bonne qualité de faisceau lumineux, tout en demeurant d'une taille réduite. Elle est donc parfaitement adaptée à un module lumineux selon l'invention, dont les dimensions doivent être limitées pour pouvoir être, par exemple, incorporé dans un véhicule automobile.Advantageously, each light source is constituted by a light emitting diode. Such a diode offers a good quality of light beam, while remaining of a reduced size. It is therefore perfectly suited to a light module according to the invention, the dimensions of which must be limited in order to be able to be, for example, incorporated into a motor vehicle.

De façon préférentielle, le substrat présente une surface d'implantation des sources lumineuses, ladite surface présentant une avancée centrale, de sorte que les sources lumineuses placées au niveau des zones d'extrémité de ladite surface, se retrouvent en retrait de celles placées sur ladite avancée par rapport au sens d'émission de la lumière par lesdites sources. Autrement dit, chaque source lumineuse placée au niveau d'une surface d'entrée d'une portion élémentaire d'extrémité, se retrouve plus éloignée de la surface de sortie de la même portion élémentaire, que ne le sont les sources lumineuses placées au niveau des surfaces d'entrée des portions élémentaires intermédiaires par rapport à leurs surfaces de sortie correspondantes. De cette manière, sur un véhicule automobile, les sources lumineuses d'extrémité pourront fournir un éclairage intense se focalisant sur la portée, tandis que les sources lumineuses intermédiaires proposeront un éclairage étalé se focalisant sur la largeur.Preferably, the substrate has a surface for implantation of light sources, said surface having a central projection, so that the light sources placed at the level of the end zones of said surface are found set back from those placed on said surface. advanced by relative to the direction of emission of light by said sources. In other words, each light source placed at an entry surface of an elementary end portion, is found further from the exit surface of the same elementary portion, than are the light sources placed at the level. input surfaces of the elementary portions intermediate with respect to their corresponding output surfaces. In this way, on a motor vehicle, the end light sources will be able to provide intense illumination focusing on the range, while the intermediate light sources will provide spread illumination focusing on the width.

Selon un mode de réalisation préféré d'un module lumineux selon l'invention, ledit module possède deux sources lumineuses placées chacune dans une zone d'extrémité de la surface d'implantation du substrat, et trois sources lumineuses placées au niveau de l'avancée, lesdites cinq sources étant alignées en vue de face et émettant de la lumière dans la même direction. De cette manière, si le module était implanté dans un projecteur de véhicule, les deux sources lumineuses d'extrémité seraient conçues pour fournir un éclairage intense se focalisant sur la portée, et les trois sources lumineuses intermédiaires proposeraient un éclairage ayant une grande largeur.According to a preferred embodiment of a light module according to the invention, said module has two light sources each placed in an end zone of the implantation surface of the substrate, and three light sources placed at the level of the projection. , said five sources being aligned in front view and emitting light in the same direction. In this way, if the module were implanted in a vehicle headlight, the two end light sources would be designed to provide intense illumination focusing on the range, and the three intermediate light sources would provide illumination having a large width.

Préférentiellement, les sources lumineuses sont des LED comprenant au moins un élément photoémissif, au moins une source lumineuse dont les bords de l'élément photoémissif présentent, en vue de face, une orientation différente de ceux d'une autre LED.Preferably, the light sources are LEDs comprising at least one photoemissive element, at least one light source whose edges of the photoemissive element have, in front view, an orientation different from those of another LED.

De façon avantageuse, la surface d'implantation du substrat possède un évidement apte à recevoir une carte électronique. Cette carte va servir à alimenter en courant électrique les sources lumineuses du module.Advantageously, the implantation surface of the substrate has a recess suitable for receiving an electronic card. This card will be used to supply the light sources of the module with electric current.

De façon avantageuse, la carte électronique est dotée d'un connecteur électrique.Advantageously, the electronic card is provided with an electrical connector.

Avantageusement, un module lumineux selon l'invention, comprend un radiateur pour refroidir les sources lumineuses.Advantageously, a light module according to the invention comprises a radiator for cooling the light sources.

De façon préférentielle, le radiateur comprend le substrat.Preferably, the radiator comprises the substrate.

Préférentiellement, le radiateur forme une pièce monobloc. Avantageusement, le radiateur est en métal.Preferably, the radiator forms a single piece. Advantageously, the radiator is made of metal.

L'invention a pour troisième objet un dispositif lumineux de véhicule comprenant au moins un module lumineux conforme à l'invention.The third subject of the invention is a vehicle lighting device comprising at least one light module in accordance with the invention.

Avantageusement, un dispositif lumineux selon l'invention comprend:

  • un boîtier destiné à être fixé sur un véhicule,
  • une glace de fermeture dudit boîtier,
ledit module lumineux étant logé à l'intérieur de l'espace délimité par le boîtier et la glace de fermeture, le dispositif lumineux étant agencé de manière à ce que les rayons sortant de ladite surface de sortie globale atteignent directement ladite glace de fermeture.Advantageously, a light device according to the invention comprises:
  • a box intended to be fixed on a vehicle,
  • a glass for closing said housing,
said light module being housed inside the space delimited by the housing and the closing glass, the lighting device being arranged so that the rays exiting from said overall exit surface directly reach said closing glass.

De façon préférentielle, les rayons émis par le module en sortie de la surface de sortie globale du module forment une portion ou l'intégralité d'un faisceau d'éclairage de la route, de signalisation, ou d'éclairage de l'habitacle. De cette manière, il n'est pas utile de mettre un autre élément de déviation optique ou un cache. Autrement dit, le dispositif lumineux peut être dépourvu de lentille, de réflecteur ou de cache après la surface de sortie globale.Preferably, the rays emitted by the module at the output of the overall output surface of the module form a portion or all of a beam of road lighting, signaling, or passenger compartment lighting. In this way, there is no need to put another optical deflection element or a cover. In other words, the luminous device can be devoid of lens, reflector or mask after the overall exit surface.

Un module lumineux selon l'invention présente l'avantage de mettre en œuvre une seule pièce en matériaux transparent, et destinée à être utilisée avec plusieurs sources lumineuses, pour remplir une fonction spécifique d'éclairage ou de signalisation. Puisque la pièce transparente possède une géométrie compacte, ledit module a l'avantage d'être peu encombrant. Il présente de plus l'avantage d'engendrer des coûts modérés, en évitant d'avoir à usiner plusieurs lentilles, dédiées chacune à une fonction particulière d'éclairage et/ou de signalisation. Il a de plus l'avantage de pouvoir produire une grande variabilité de faisceaux lumineux en fonction du nombre et de l'emplacement des sources lumineuses associées, pour répondre à différents besoins et exigences en matière d'éclairage. Un module lumineux selon l'invention, présente enfin l'avantage d'être particulièrement adapté à un véhicule automobile, dans lequel les faisceaux lumineux sont nécessaires, que ce soit au niveau des projecteurs pour assurer une fonction d'éclairage de la route ou de signalisation, ou au niveau de l'habitacle pour assurer un éclairage à l'attention des passagers.A light module according to the invention has the advantage of using a single piece of transparent material, and intended to be used with several light sources, to fulfill a specific lighting or signaling function. Since the transparent part has a compact geometry, said module has the advantage of being compact. It also has the advantage of generating moderate costs, avoiding having to machine several lenses, each dedicated to a particular lighting and / or signaling function. It also has the advantage of being able to produce a great variability of light beams according to the number and the location of the associated light sources, to meet different lighting needs and requirements. Finally, a light module according to the invention has the advantage of being particularly suitable for a motor vehicle, in which the light beams are necessary, whether at the headlamps to ensure a lighting function of the vehicle. road or signaling, or at the level of the passenger compartment to provide lighting for the attention of passengers.

On donne, ci-après, une description détaillée d'un mode de réalisation préféré d'une pièce en matériau transparent selon l'invention, et d'un module lumineux utilisant une telle pièce, en se référant aux figures 1A à 9B.

  • La figure 1A est une vue en éclaté d'un module lumineux selon l'invention,
  • La figure 1B est une vue de côté du module de la figure 1A monté,
  • La figure 2A est une vue de face d'une pièce en matériau transparent selon l'invention,
  • La figure 2B est une vue de dessus de la pièce de la figure 2A,
  • La figure 3 est une vue partielle de dessus d'un module lumineux selon l'invention,
  • La figure 4 est une vue de face d'un substrat d'un module lumineux selon l'invention, ledit substrat supportant des diodes électroluminescentes,
  • La figure 5A est une vue analogue à la figure 2B, illustrant un exemple de trajectoire de faisceaux lumineux issus d'une première diode d'un module lumineux selon l'invention,
  • La figure 5B est un diagramme isolux du faisceau lumineux produit par la première diode de la figure 5A,
  • La figure 6A est une vue analogue à la figure 2B, illustrant un exemple de trajectoire de faisceaux lumineux issus d'une deuxième diode d'un module lumineux selon l'invention,
  • La figure 6B est un diagramme isolux du faisceau lumineux produit par la deuxième diode de la figure 5A,
  • La figure 7A est une vue analogue à la figure 2B, illustrant un exemple de trajectoire de faisceaux lumineux issus d'une troisième diode d'un module lumineux selon l'invention,
  • La figure 7B est un diagramme isolux du faisceau lumineux produit par la troisième diode de la figure 5A,
  • La figure 8A est une vue analogue à la figure 2B, illustrant un exemple de trajectoire de faisceaux lumineux issus d'une quatrième diode d'un module lumineux selon l'invention,
  • La figure 8B est un diagramme isolux du faisceau lumineux produit par la quatrième diode de la figure 5A,
  • La figure 9A est une vue analogue à la figure 2B, illustrant un exemple de trajectoire de faisceaux lumineux issus d'une cinquième diode d'un module lumineux selon l'invention,
  • La figure 9B est un diagramme isolux du faisceau lumineux produit par la cinquième diode de la figure 5A.
A detailed description is given below of a preferred embodiment of a part made of transparent material according to the invention, and of a light module using such a part, with reference to the figures 1A to 9B .
  • The figure 1A is an exploded view of a light module according to the invention,
  • The figure 1B is a side view of the module of the figure 1A mounted,
  • The figure 2A is a front view of a part made of transparent material according to the invention,
  • The figure 2B is a top view of the room from the figure 2A ,
  • The figure 3 is a partial top view of a light module according to the invention,
  • The figure 4 is a front view of a substrate of a light module according to the invention, said substrate supporting light emitting diodes,
  • The figure 5A is a view analogous to figure 2B , illustrating an example of the trajectory of light beams coming from a first diode of a light module according to the invention,
  • The figure 5B is an isolux diagram of the light beam produced by the first diode of the figure 5A ,
  • The figure 6A is a view analogous to figure 2B , illustrating an example of the trajectory of light beams coming from a second diode of a light module according to the invention,
  • The figure 6B is an isolux diagram of the light beam produced by the second diode of the figure 5A ,
  • The figure 7A is a view analogous to figure 2B , illustrating an example of the trajectory of light beams coming from a third diode of a light module according to the invention,
  • The figure 7B is an isolux diagram of the light beam produced by the third diode of the figure 5A ,
  • The figure 8A is a view analogous to figure 2B , illustrating an example of the trajectory of light beams coming from a fourth diode of a light module according to the invention,
  • The figure 8B is an isolux diagram of the light beam produced by the fourth diode of the figure 5A ,
  • The figure 9A is a view analogous to figure 2B , illustrating an example of the trajectory of light beams coming from a fifth diode of a light module according to the invention,
  • The figure 9B is an isolux diagram of the light beam produced by the fifth diode of the figure 5A .

En se référant aux figures 1A et 1B, un module lumineux 1 selon l'invention comprend un radiateur 2 relié à un substrat 3, une carte électronique 4 dotée d'un connecteur 5 électrique, cinq diodes électroluminescentes 6 qui seront dénommées LED pour la suite de la description, une pièce 7 en matériau transparent selon l'invention et un boitier 8 de protection et de maintien, apte à venir enserrer ladite pièce 7 transparente. Le boitier 8 est fixé au substrat 3 au moyen d'une première série de vis 9. La carte électronique 4 est ancrée dans le substrat 3 au moyen d'une deuxième série de vis 10. Un tel module 1 est destiné à venir se fixer, par exemple, à l'intérieur d'un projecteur de véhicule.With reference to figures 1A and 1B , a light module 1 according to the invention comprises a radiator 2 connected to a substrate 3, an electronic card 4 provided with an electrical connector 5, five light-emitting diodes 6 which will be called LEDs for the remainder of the description, a part 7 in transparent material according to the invention and a housing 8 for protection and maintenance, able to come to grip said transparent part 7. The box 8 is fixed to the substrate 3 by means of a first series of screws 9. The electronic card 4 is anchored in the substrate 3 by means of a second series of screws 10. Such a module 1 is intended to be fixed. , for example, inside a vehicle headlight.

En se référant aux figures 2A, 2B et 3, la pièce 7 en matériau transparent selon l'invention est pleine et est réalisée en PVC (polychlorure de vinyle), et joue le rôle d'une lentille optique. Cette pièce comporte schématiquement deux pattes latérales 11, 12 et un corps central 13 situé entre lesdites pattes 11, 12 et en position décalée par rapport à celles-ci. Ledit corps 13 est bordé par deux bras 14, 15 d'extrémité, reliés chacun à une patte 11, 12, chacun desdits bras 14, 15 s'étendant selon une direction qui est perpendiculaire à celle de la patte 11, 12 à laquelle il est raccordé. Les deux pattes 11, 12 sont rigoureusement alignées, si bien que la pièce transparente 7 peut venir en appui contre une surface plane, par l'intermédiaire de ces pattes 11, 12. Le corps 13 de cette pièce 7 est divisée en cinq portions élémentaires 16, 17, 18, 19, 20 pleines, caractérisée chacune par une surface d'entrée 21, 22, 23, 24, 25 et par une surface de sortie 26, 27, 28, 29, 30. Ces cinq portions 16, 17, 18, 19, 20 sont sensiblement alignées selon une même direction, qui est celle selon laquelle les deux pattes 11, 12 sont reliées. Cette pièce transparente 7 dispose ainsi de deux portions élémentaires 16, 17 d'extrémité, matérialisée par les deux bras 14, 15 d'extrémité, et de trois portions élémentaires intermédiaires 18, 19, 20 positionnées entre lesdites portions 16, 17 d'extrémité. Les cinq surfaces de sortie 26, 27, 28, 29, 30 sont jointives, pour former une surface de sortie globale de ladite pièce 7, qui est continue. Ces cinq surfaces de sortie 26, 27, 28, 29, 30 constituent la partie la plus avancée du corps 13 par rapport aux deux pattes latérales 11, 12. Les cinq surfaces d'entrée 21, 22, 23, 24, 25 sont séparées les unes des autres, et se retrouvent sensiblement alignées avec les deux pattes 11, 12. Chaque portion 16, 17, 18, 19, 20 est allongée, la surface d'entrée 21, 22, 23, 24, 25 et la surface de sortie 26, 27, 28, 29, 30 constituant les deux extrémités de chacune desdites portions 16, 17, 18, 19, 20 le long de leur axe longitudinal. Les trois portions élémentaires intermédiaires 18, 19, 20 possèdent chacune deux parois 31, 32, 33, 34, 35, 36 prenant naissance au niveau de la surface d'entrée 23, 24, 25 et s'étendant vers deux bords délimitant la surface de sortie 28, 29, 30 de la même portion 18, 19, 20. Ces parois 31, 32, 33, 34, 35, 36, qui peuvent par exemple être aluminées, sont destinées à empêcher les faisceaux produits par une source lumineuse placée au niveau d'une surface d'entrée 23, 24, 25 d'une portion 18, 19, 20, de passer à travers la surface de sortie d'une portion adjacente. Les deux portions 16, 17 élémentaires d'extrémité ne possèdent qu'une seule paroi 37, 38 destinée à empêcher une source lumineuse placée au niveau de la surface d'entrée 21, 22, de l'une d'elles, d'irradier une surface de sortie d'une portion élémentaire adjacente, puisque chacune desdites portions d'extrémité 16, 17 ne possède qu'une seule portion élémentaire adjacente. Les parois 31, 32, 33, 34, 35, 36, 37, 38 de deux portions élémentaires 16, 17, 18, 19, 20 adjacentes se rejoignent au moyen d'un segment de paroi courbe. La pièce transparente 7 présente ainsi une série de quatre creux 39, 40, 41, 42 alignés en alternance avec les cinq portions élémentaires 16, 17, 18, 19, 20, chaque creux étant ainsi délimité par une paroi d'une portion élémentaire et par une paroi d'une portion élémentaire adjacente. Les deux surfaces d'entrée 21, 22 des deux portions élémentaires 16, 17 d'extrémité sont situées en retrait des surfaces d'entrée 23, 24, 25 des trois portions élémentaires intermédiaires 18, 19, 20. Pour chacune des cinq portions élémentaires 16, 17, 18, 19, 20, la distance moyenne séparant la surface d'entrée et la surface de sortie est sensiblement constante. Les surfaces d'entrée 21, 22, 23, 24, 25 sont parallèles et les surfaces de sortie 26, 27, 28, 29, 30 sont de forme arrondie. Comme le montre la figure 5A, la pièce transparente 7 n'est pas rectiligne. Les pattes latérales 11, 12 sont parallèles et sont reliées entre elles par le corps 13, qui est matérialisé par un segment rectiligne et incliné par rapport audites deux pattes 11, 12, d'un angle inférieur à 10°. Comme cela est précisé sur la figure 2A, cette pièce 7 comprend un coté droit (DR) et un coté gauche (GA).With reference to figures 2A, 2B and 3 , the part 7 made of transparent material according to the invention is solid and is made of PVC (polyvinyl chloride), and acts as an optical lens. This part schematically comprises two side tabs 11, 12 and a central body 13 located between said tabs 11, 12 and in a position offset relative to them. Said body 13 is bordered by two end arms 14, 15, each connected to a tab 11, 12, each of said arms 14, 15 extending in a direction which is perpendicular to that of the tab 11, 12 to which it is connected. The two legs 11, 12 are strictly aligned, so that the transparent part 7 can bear against a flat surface, by means of these tabs 11, 12. The body 13 of this part 7 is divided into five elementary portions 16, 17, 18, 19, 20, each characterized by a solid surface inlet 21, 22, 23, 24, 25 and by an outlet surface 26, 27, 28, 29, 30. These five portions 16, 17, 18, 19, 20 are substantially aligned in the same direction, which is that according to which the two legs 11, 12 are connected. This transparent part 7 thus has two elementary end portions 16, 17, materialized by the two end arms 14, 15, and three intermediate elementary portions 18, 19, 20 positioned between said end portions 16, 17 . The five exit surfaces 26, 27, 28, 29, 30 are contiguous, to form an overall exit surface of said part 7, which is continuous. These five outlet surfaces 26, 27, 28, 29, 30 constitute the most advanced part of the body 13 with respect to the two lateral legs 11, 12. The five inlet surfaces 21, 22, 23, 24, 25 are separated. from each other, and are found substantially aligned with the two legs 11, 12. Each portion 16, 17, 18, 19, 20 is elongated, the inlet surface 21, 22, 23, 24, 25 and the surface of outlet 26, 27, 28, 29, 30 constituting the two ends of each of said portions 16, 17, 18, 19, 20 along their longitudinal axis. The three intermediate elementary portions 18, 19, 20 each have two walls 31, 32, 33, 34, 35, 36 originating at the level of the entry surface 23, 24, 25 and extending towards two edges delimiting the surface. output 28, 29, 30 of the same portion 18, 19, 20. These walls 31, 32, 33, 34, 35, 36, which can for example be aluminized, are intended to prevent the beams produced by a light source placed at an entrance surface 23, 24, 25 of a portion 18, 19, 20, to pass through the exit surface of an adjacent portion. The two end elementary portions 16, 17 have only one wall 37, 38 intended to prevent a light source placed at the level of the entrance surface 21, 22, of one of them, from irradiating. an exit surface of an adjacent elementary portion, since each of said end portions 16, 17 has only one adjacent elementary portion. The walls 31, 32, 33, 34, 35, 36, 37, 38 of two elementary portions 16, 17, 18, 19, 20 are joined together by means of a curved wall segment. The transparent part 7 thus presents a series of four hollows 39, 40, 41, 42 aligned alternately with the five elementary portions 16, 17, 18, 19, 20, each hollow being thus delimited by a wall of an elementary portion and by a wall of 'an adjacent elementary portion. The two entry surfaces 21, 22 of the two elementary end portions 16, 17 are set back from the entry surfaces 23, 24, 25 of the three intermediate elementary portions 18, 19, 20. For each of the five elementary portions 16, 17, 18, 19, 20, the average distance separating the entrance surface and the exit surface is substantially constant. The inlet surfaces 21, 22, 23, 24, 25 are parallel and the outlet surfaces 26, 27, 28, 29, 30 are rounded in shape. As shown in the figure 5A , the transparent part 7 is not rectilinear. The side legs 11, 12 are parallel and are interconnected by the body 13, which is materialized by a rectilinear segment and inclined relative to the two legs 11, 12, at an angle of less than 10 °. As specified on the figure 2A , this part 7 includes a right side (DR) and a left side (GA).

En se référant aux figures 1 et 3, le radiateur 2 et le substrat 3 constituent une pièce monobloc en métal. Le substrat 3 est assimilable à une plaque de faible épaisseur possédant une face 43 d'implantation dotée d'un évidement 44 dont le contour est analogue à celui de la carte 4 électronique, ledit évidement 44 étant destiné à recevoir ladite carte 4. Cette face 43 présente une protubérance 45 centrale bordant partiellement l'évidement 44 et contribuant à agrandir partiellement le bord cernant ledit évidement 44.With reference to figures 1 and 3 , the radiator 2 and the substrate 3 constitute a single piece of metal. The substrate 3 can be likened to a thin plate having an implantation face 43 provided with a recess 44 whose contour is similar to that of the electronic card 4, said recess 44 being intended to receive said card 4. This face 43 has a central protuberance 45 partially bordering the recess 44 and contributing to partially enlarging the edge surrounding said recess 44.

En se référant aux figures 3 et 4, les cinq LED 6 sont solidarisées à la face 43 du substrat 3, qui est dotée de l'évidement 44, au niveau d'une zone extérieure audit évidement 44.With reference to figures 3 and 4 , the five LEDs 6 are secured to the face 43 of the substrate 3, which is provided with the recess 44, at an area outside said recess 44.

Plus précisément, en se référant à la figure 4, les cinq LED 6 sont disposées le long du bord délimitant l'évidement 44, trois LED 6 étant placées sur la protubérance 45 et les deux autres LED 6 étant placées au niveau de la face 43 du substrat 3 située à une altitude moins élevée que celle de ladite protubérance 45. De cette manière, deux LED 6 d'extrémité encadrent trois LED 6 intermédiaires, surélevées. Chaque LED 6 présente un élément photoémissif assimilable à un objet de forme carré et ayant une faible épaisseur.More precisely, with reference to the figure 4 , the five LEDs 6 are arranged along the edge delimiting the recess 44, three LEDs 6 being placed on the protuberance 45 and the two other LEDs 6 being placed at the level of the face 43 of the substrate 3 located at a lower altitude than that of said protuberance 45. In this way, two end LEDs 6 frame three intermediate LEDs 6, raised. Each LED 6 has an element photoemissive similar to a square object and having a low thickness.

Les cinq LED 6 sont tournées différemment par rapport à la direction vers l'avant, soit la direction d'émission du module. En d'autres termes, en vu de face, ces LED présentent des orientations différentes. Par exemple en projection sur un plan de projection situé devant les LED et perpendiculaire à l'axe optique ou principal d'émission du module lumineux, ces LED présentent des orientations différentes au sein dudit plan de projection. Ainsi, deux LED peuvent être agencées de manière à ce que les bords de leurs éléments photoémissifs présentent, en vue de face, une orientation différente. Ces bords peuvent, en vue de face, faire entre eux un angle de 45°. Ces cinq LED 6 sont disposées pour émettre un faisceau lumineux dans la même direction.The five LEDs 6 are turned differently compared to the forward direction, that is to say the direction of emission of the module. In other words, when viewed from the front, these LEDs have different orientations. For example in projection onto a projection plane located in front of the LEDs and perpendicular to the optical or main emission axis of the light module, these LEDs have different orientations within said projection plane. Thus, two LEDs can be arranged so that the edges of their photoemissive elements have, in front view, a different orientation. These edges may, in front view, form an angle of 45 ° with each other. These five LEDs 6 are arranged to emit a light beam in the same direction.

En se référant à la figure 3, la pièce transparente 7 selon l'invention, vient se fixer sur le substrat 3 de manière à ce que chacune des cinq LED 6 solidarisées audit substrat 3, vienne se positionner au niveau d'une surface d'entrée 21, 22, 23, 24, 25 de ladite pièce 7. Plus précisément, les LED 6 se retrouvent à l'extérieur des portions élémentaires 16, 17, 18, 19, 20 de la pièce 7, de sorte que chaque LED 6 peut envoyer des faisceaux lumineux vers la surface d'entrée 21, 22, 23, 24, 25 à laquelle elle est associée, lesdits faisceaux traversant ladite surface d'entrée 21, 22, 23, 24, 25 pour ensuite passer par la surface de sortie 26, 27, 28, 29, 30 de la même portion. Ainsi, les faisceaux lumineux issus de chaque surface d'entrée 21, 22, 23, 24, 25 peuvent, soit directement parvenir à la surface de sortie 26, 27, 28, 29, 30 correspondante, soit être préalablement réfléchis sur les parois 31, 32, 33, 34, 35, 36, 37, 38 avant d'arriver sur ladite surface de sortie 26, 27, 28, 29, 30. Les parois 31, 32, 33, 34, 35, 36, 37, 38 évitent que les faisceaux lumineux émis par une LED 6 placée au niveau d'une portion élémentaire 16, 17, 18, 19, 20, ne parviennent jusqu'à la surface de sortie 26, 27, 28, 29, 30 d'une portion élémentaire adjacente 16, 17, 18, 19, 20. Les portions élémentaires 16, 17, 18, 19, 20 agissent de façon séparées et autonomes, dans le but d'obtenir un faisceau lumineux résultant, sans interférences parasites.With reference to the figure 3 , the transparent part 7 according to the invention, is fixed on the substrate 3 so that each of the five LEDs 6 secured to said substrate 3, comes to be positioned at an entrance surface 21, 22, 23, 24, 25 of said part 7. More precisely, the LEDs 6 are found outside the elementary portions 16, 17, 18, 19, 20 of the part 7, so that each LED 6 can send light beams towards the inlet surface 21, 22, 23, 24, 25 with which it is associated, said beams passing through said inlet surface 21, 22, 23, 24, 25 and then passing through the outlet surface 26, 27, 28, 29, 30 of the same portion. Thus, the light beams coming from each input surface 21, 22, 23, 24, 25 can either directly reach the corresponding output surface 26, 27, 28, 29, 30, or be reflected beforehand on the walls 31 , 32, 33, 34, 35, 36, 37, 38 before arriving on said exit surface 26, 27, 28, 29, 30. The walls 31, 32, 33, 34, 35, 36, 37, 38 prevent the light beams emitted by an LED 6 placed at an elementary portion 16, 17, 18, 19, 20, from reaching the exit surface 26, 27, 28, 29, 30 of a portion adjacent elementary 16, 17, 18, 19, 20. The elementary portions 16, 17, 18, 19, 20 act separately and autonomously, with the aim of obtaining a resulting light beam, without parasitic interference.

En se référant à la figure 1B, une fois que la pièce 7 transparente a été montée sur le substrat 3, le boitier 8 vient se visser sur ledit substrat 3 en coiffant partiellement ladite pièce transparente 7. On obtient ainsi un module lumineux 1 de forme compacte, apte à venir s'insérer dans un espace retiré et peu accessible, comme ceux pouvant être rencontrés dans un véhicule automobile.With reference to the figure 1B , once the transparent part 7 has been mounted on the substrate 3, the housing 8 is screwed onto said substrate 3 by partially covering said transparent part 7. This gives a light module 1 of compact shape, able to come s' insert in a remote and inaccessible space, such as those that may be encountered in a motor vehicle.

Les figures 5A à 9B illustrent un exemple d'utilisation d'un module lumineux 1 selon l'invention, en décomposant le faisceau lumineux résultant, en plusieurs composantes issues chacune d'une portion élémentaire 16, 17, 18, 19, 20, dudit module 1 associée à la LED 6 correspondante.The figures 5A to 9B illustrate an example of use of a light module 1 according to the invention, by breaking down the resulting light beam, into several components each coming from an elementary portion 16, 17, 18, 19, 20, of said module 1 associated with the Corresponding LED 6.

De cette manière, en se référant aux figures 5A et 5B, la portion élémentaire d'extrémité 16 située à gauche du module 1 et associée à la LED 6 d'extrémité correspondante, peut servir à produire un éclairage gauche de portée. Cet éclairage est plutôt concentré et intense.In this way, referring to the figures 5A and 5B , the elementary end portion 16 located to the left of the module 1 and associated with the corresponding end LED 6, can be used to produce left range lighting. This lighting is rather concentrated and intense.

En se référant aux figures 6A et 6B, la portion élémentaire 18 intermédiaire gauche, associée à la LED 6 correspondante, peut servir à produire un éclairage étendu horizontalement vers la gauche. Cet éclairage est plutôt peu intense et étalé transversalement par rapport au véhicule.With reference to figures 6A and 6B , the left intermediate elementary portion 18, associated with the corresponding LED 6, can be used to produce lighting extended horizontally to the left. This lighting is rather weak and spread out transversely to the vehicle.

En se référant aux figures 7A et 7B, la portion élémentaire 19 intermédiaire centrale, associée à la LED 6 correspondante, peut servir à produire un éclairage étendu horizontalement autant vers la droite que vers la gauche. Cet éclairage est plutôt peu intense et étalé transversalement par rapport au véhicule.With reference to figures 7A and 7B , the central intermediate elementary portion 19, associated with the corresponding LED 6, can be used to produce illumination extended horizontally as much to the right as to the left. This lighting is rather weak and spread out transversely to the vehicle.

En se référant aux figures 8A et 8B, la portion élémentaire 20 intermédiaire gauche, associée à la LED 6 correspondante, peut servir à produire un éclairage étendu horizontalement vers la gauche. Cet éclairage est plutôt peu intense et étalé transversalement par rapport au véhicule.With reference to figures 8A and 8B , the left intermediate elementary portion 20, associated with the corresponding LED 6, can be used to produce lighting extended horizontally towards the left. This lighting is rather weak and spread out transversely to the vehicle.

En se référant aux figures 9A et 9B, la portion élémentaire d'extrémité 17 située à gauche du module 1 et associée à la LED 6 d'extrémité correspondante, peut servir à produire un éclairage gauche de portée, incliné d'un angle de 15° par rapport à un axe horizontal. Cet éclairage est plutôt concentré et intense.With reference to figures 9A and 9B , the elementary end portion 17 located to the left of the module 1 and associated with the corresponding end LED 6, can be used to produce a left range lighting, inclined at an angle of 15 ° to a horizontal axis. This lighting is rather concentrated and intense.

Comme le montrent clairement les figures 5A, 6A, 7A, 8A et 9A, les faisceaux lumineux produits par chaque LED 6 du module lumineux 1, ne traversent que la portion élémentaire 16, 17, 18, 19, 20 à laquelle ladite LED 6 est associée, sans pouvoir se diriger vers la surface de sortie 26, 27, 28, 29, 30 d'une portion élémentaire adjacente 16, 17, 18, 19, 20. Il en découle qu'un module lumineux 1 selon l'invention, est apte à produire un faisceau lumineux résultant, qui est net et précis, car dépourvu de tous faisceaux lumineux parasites dus à des interférences lumineuses entre les différentes portions élémentaires 16, 17, 18, 19, 20 dudit module 1.As the figures 5A, 6A , 7A, 8A and 9A , the light beams produced by each LED 6 of the light module 1, only pass through the elementary portion 16, 17, 18, 19, 20 to which said LED 6 is associated, without being able to move towards the output surface 26, 27, 28, 29, 30 of an adjacent elementary portion 16, 17, 18, 19, 20. It follows that a light module 1 according to the invention is capable of producing a resulting light beam, which is sharp and precise, because devoid of any parasitic light beams due to light interference between the different elementary portions 16, 17, 18, 19, 20 of said module 1.

Bien que les LED portent toutes la même référence dans la description, en l'occurrence le chiffre 6, elles peuvent naturellement avoir des caractéristiques structurelles, géométriques et lumineuses différentes au sein d'un même module lumineux 1, lesdites LED 6 étant choisies en fonction des besoins spécifiques en matière d'éclairage.Although the LEDs all bear the same reference in the description, in this case the number 6, they can naturally have different structural, geometric and light characteristics within the same light module 1, said LEDs 6 being chosen according to specific lighting needs.

Claims (13)

  1. Part (7) made of transparent material comprising at least three elementary segments (16, 17, 18, 19, 20) each formed from an entrance surface (21, 22, 23, 24, 25) and from an exit surface (26, 27, 28, 29, 30), the exit surface (26, 27, 28, 29, 30) being focused onto the entrance surface (21, 22, 23, 24, 25) of the same segment (16, 17, 18, 19, 20), the exit surfaces (26, 27, 28, 29, 30) adjoining so as to form an overall exit surface of said part (7) of integral construction, and the entrance surfaces (21, 22, 23, 24, 25) being distant from one another and being separated by means (31, 32, 33, 34, 35, 36, 37, 38) suitable for preventing rays generated by a light source placed level with the entrance surface (21, 22, 23, 24, 25) of a segment (16, 17, 18, 19, 20) from being able to pass through the exit surface (26, 27, 28, 29, 30) of the adjacent elementary segment (16, 17, 18, 19, 20), and the elementary segments (16, 17, 18, 19, 20) being aligned, characterized in that the means consist of walls (31, 32, 33, 34, 35, 36, 37, 38) that start at each entrance surface (21, 22, 23, 24, 25) and that extend toward the corresponding exit surface (26, 27, 28, 29, 30) and in that the two entrance surfaces (21, 22) of two end elementary segments (16, 17) are bordered by a single wall (37, 38), and in that the entrance surfaces (23, 24, 25) of the other elementary segments (23, 24, 25) are each bordered by two walls (31, 32, 33, 34, 35, 36).
  2. Part according to Claim 1, wherein each wall (31, 32, 33, 34, 35, 36, 37, 38) extends towards an edge delineating the exit surface (26, 27, 28, 29, 30).
  3. Part according to either one of Claims 1 and 2, wherein each wall (31, 32, 33, 34, 35, 36, 37, 38) has a curved profile.
  4. Part according to any one of Claims 1 to 5, comprising a plurality of recesses (39, 40, 41, 42) each bounded by a wall (31, 32, 33, 34, 35, 36, 37, 38) of one elementary segment (16, 17, 18, 19, 20) and a wall (31, 32, 33, 34, 35, 36, 37, 38) of the adjacent elementary segment (16, 17, 18, 19, 20).
  5. Part according to any one of the preceding claims, wherein the exit surface (26, 27, 28, 29, 30) and the entrance surface (21, 22, 23, 24, 25) of a given segment (16, 17, 18, 19, 20) face one another.
  6. Part according to any one of the preceding claims, wherein each exit surface (26, 27, 28, 29, 30) is convex with respect to the exterior of the part (7).
  7. Luminous module (1) comprising a part (7) made of transparent material according to any one of Claims 1 to 6, a substrate (3) and at least three light sources (6) mounted on said substrate (3), said sources (6) illuminating the entrance surfaces (21, 22, 23, 24, 25) of three adjacent elementary segments (16, 17, 18, 19, 20), the beams issuing from an entrance surface (21, 22, 23, 24, 25) being able to pass only through the exit surface (26, 27, 28, 29, 30) of the same elementary segment (16, 17, 18, 19, 20), separating means (31, 32, 33, 34, 35, 36, 37, 38) preventing said beams from passing through the exit surface (26, 27, 28, 29, 30) of the adjacent elementary segment (16, 17, 18, 19, 20).
  8. Luminous module according to Claim 7, wherein each light source is a light-emitting diode (6).
  9. Luminous module according to either one of Claims 7 and 8, wherein the substrate (3) comprises a surface (43) for mounting the light sources (6), said surface (43) comprising a central protrusion (45) so that the light sources (6) placed in end regions of said surface (43) are located set back from those placed on said protrusion (45), with respect to the direction of emission of light by said sources (6).
  10. Luminous module according to Claim 9, wherein the light sources are LEDs comprising at least one photoemissive element, at least one light source (6) the edges of the photoemissive element of which have, seen face-on, a different orientation from those of another LED (6).
  11. Luminous vehicle device comprising at least one luminous module (1) according to any one of Claims 7 to 10.
  12. Luminous vehicle device according to Claim 11, comprising:
    - a housing intended to be fastened to a vehicle,
    - an outer lens for closing said housing,
    said luminous module (1) being housed inside the space bounded by the housing and the closing outer lens, the luminous device being arranged so that the rays exiting from said overall exit surface reach said closing outer lens directly.
  13. Luminous vehicle device according to Claim 11 or 12, wherein the rays emitted by the module on exiting from the overall exit surface of the module form a segment or the entirety of a beam for illuminating the road, for signalling, or for illuminating the passenger comDartment.
EP15184928.8A 2014-09-16 2015-09-11 Lighting device of a vehicle using a multi-source optical lens Active EP2998645B1 (en)

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EP1213178A2 (en) * 2000-12-06 2002-06-12 Hella KG Hueck & Co. Vehicle headlamp
FR2853395A1 (en) * 2003-04-03 2004-10-08 Koito Mfg Co Ltd VEHICLE HEADLIGHT AND SEMICONDUCTOR PHOTOEMISSILE ELEMENT FOR VEHICLE HEADLIGHT
FR2854227A1 (en) * 2003-04-23 2004-10-29 Koito Mfg Co Ltd Vehicle headlight, has lighting device units each including light source having photo-emissive semiconductor device e.g. LED and projection lens projecting inverse image of light source towards front of head light
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Also Published As

Publication number Publication date
FR3025865A1 (en) 2016-03-18
FR3025865B1 (en) 2016-12-09
US20160076721A1 (en) 2016-03-17
CN105423209B (en) 2019-12-06
US9879838B2 (en) 2018-01-30
EP2998645A2 (en) 2016-03-23
CN105423209A (en) 2016-03-23
EP2998645A3 (en) 2016-06-15

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