EP3604905B1 - Light device for a motor vehicle - Google Patents

Light device for a motor vehicle Download PDF

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Publication number
EP3604905B1
EP3604905B1 EP19020459.4A EP19020459A EP3604905B1 EP 3604905 B1 EP3604905 B1 EP 3604905B1 EP 19020459 A EP19020459 A EP 19020459A EP 3604905 B1 EP3604905 B1 EP 3604905B1
Authority
EP
European Patent Office
Prior art keywords
light
connecting bridge
light rays
luminous device
optical element
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
EP19020459.4A
Other languages
German (de)
French (fr)
Other versions
EP3604905A1 (en
Inventor
Emeric MUDRY
Frédéric LUU
Arnaud Montheard
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 Belgique SA
Original Assignee
Valeo Vision Belgique SA
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Publication date
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Publication of EP3604905A1 publication Critical patent/EP3604905A1/en
Application granted granted Critical
Publication of EP3604905B1 publication Critical patent/EP3604905B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—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
    • 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
    • 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
    • F21S43/10—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]
    • F21S43/145—Surface emitters, e.g. organic light emitting diodes [OLED]
    • 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
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/35—Brake lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Definitions

  • the present invention relates to a lighting device for a motor vehicle.
  • the light device is configured to be mounted on the rear window of a motor vehicle.
  • a drawback of this state of the prior art is that due to the presence of said at least one connecting bridge, the light rays from said at least one light source are deflected which creates shadow areas, referenced S on the figure 1 (on which the light is represented in black and the shaded areas in white), which can be observed by a person looking at the rear window of the motor vehicle.
  • the connecting bridge is thus the site of light losses as well as inhomogeneities in the light beam formed by the light rays.
  • EP 2 317 214 A1 , DE 10 2011 002483 A1 , US 2013/021815 A1 and EP 2 587 120 A1 disclose light devices known from the prior art.
  • the present invention aims to propose a luminous device for a motor vehicle which makes it possible to solve the drawback mentioned.
  • said at least one connecting bridge comprises at least one optical structure with an input face substantially perpendicular to part of the light rays passing through said primary optical element, said output face of said secondary optical element comprising prisms at of said at least one connecting bridge so as to straighten along said optical emission axis the light rays coming from said secondary optical element after having crossed the connecting bridge.
  • the light rays which have passed through the primary optical element will propagate through said at least one connecting bridge to the output face of the optical element. secondary with minimal refraction so there is very little light loss and no shadow areas at the connecting bridge. The light is thus diffused evenly.
  • the luminous device 1 for a motor vehicle according to the invention is described with reference to the figures 2 to 7 .
  • Motor vehicle means any type of motorized vehicle.
  • the light device 1 is a traffic light.
  • the figure 2 is a view of the rear of a motor vehicle 2.
  • the motor vehicle 2 comprises a rear window 3, the latter possibly being fixed to the bodywork or being on a rear opening such as a rear hatch .
  • the light device 1 is arranged at the top of the rear window 3. In one non-limiting embodiment, it is a stop light, commonly called “third stop light”, or raised stop light, in reference to the two classic stop lights arranged lower on the left and on the right.
  • the “third stop light” or high-mounted stop light is also designated CHMSL, an acronym for the English expression “Center High-Mounted Stop Light”.
  • Such a raised brake light can also be installed at the bottom of the rear window, on the parcel shelf or mounted in the bodywork, above the rear window or even at the top of the trunk.
  • the light device 1 is configured to be placed behind the rear window 3. In this case, it comprises a case whose opening is closed by the rear window.
  • the light device 1 is configured to be integrated into the bodywork. In this case, it comprises a box closed by an outlet lens.
  • This non-limiting embodiment is taken as a non-limiting example in the remainder of the description.
  • the luminous device 1 extends along a main direction Y (illustrated on the figures 2 and 3a ) which corresponds to the horizontal when it is in the mounting position on the motor vehicle 2.
  • the light device 1 illuminates in a direction longitudinal to the motor vehicle 2 oriented towards the rear and along an optical emission axis X (illustrated on the figure 4 ) close to the horizontal, so that an observer located in the optical emission axis X and close to this optical emission axis X can see the light beam emitted by the light device 1.
  • the elements of the light device 1 are described in detail below.
  • the housing 10 is configured to receive the support 12 with said at least one light source 13, and the optical system 14.
  • the luminous device 1 is held in the motor vehicle 2 by means of its casing.
  • the latter is fixed to the body via holes (not shown) made in the body.
  • the exit lens 11 is configured to close the case 10 in a dust- and moisture-tight manner.
  • said exit lens 11 is glued to said casing 10.
  • the exit glass 11 is configured to be pressed against the rear window 3. In one non-limiting embodiment, it is held on the body of the motor vehicle 2 by means of an adhesive film 110 illustrated on the picture 3a . This makes it possible to maintain the whole of the luminous device 1 in the motor vehicle 2.
  • the output glass 11 is composed of a face facing outwards through which the light beam of the light device 1 emerges.
  • the outlet lens 11 is transparent or translucent. It can be tinted red. It has no opaque wall.
  • Bracket 12 is shown in the figure 3b and 4 .
  • the support 12 comprises at least one light source 13 configured to emit light rays R.
  • It includes a 120 electrical connector (shown on the figure 4 ) which makes it possible to connect it electrically to an electrical network of the motor vehicle 2.
  • the support 12 is a printed circuit support, also designated PCBA, an acronym for the English expression “Printed Circuit Board Assembly”.
  • said light source 13 is a semiconductor light source.
  • said semiconductor light source 13 forms part of a light-emitting diode.
  • light-emitting diode we mean any type of light-emitting diode, whether in non-limiting examples LED (“Light Emitting Diode”), OLED (“organic LED”), AMOLED (Active-Matrix-Organic LED), or FOLED (Flexible OLED).
  • Said light source 13 is configured to generate a light ray R in a direction parallel to the optical emission axis 12 of the light device 1.
  • the light device 1 comprises a plurality of light sources 13. In the non-limiting example illustrated in the figure 3b , it comprises 16 light sources 13. This non-limiting embodiment is taken as a non-limiting example in the remainder of the description.
  • the light sources 13 are arranged side by side and distributed along the main direction Y of the light device 1.
  • the light sources 13 are configured to generate light rays R which will cooperate with the optical system 14 described below. All of the light rays R of the light sources 13 form the light beam F of the light device 1. For the sake of simplification, only the light rays R of a few light sources 13 have been represented on the figure 3b .
  • the optical system 14 is illustrated in the figures 3b to 7 .
  • the optical system 14 is configured to form a light beam F along the optical emission axis X from the light rays R of the light sources 13.
  • It is thus configured to distribute the light rays R coming from the light sources 13 so that the light beam F which comes out of the output lens 11 is as homogeneous as possible.
  • the optical system 14 is secured to the support 12 and kept at a distance from said support 12. In one non-limiting embodiment, it is secured to the support 12 with at least one clip 145 (illustrated on the figure 4 and 5b ). In a non-limiting embodiment variant, it comprises a plurality of fixing clips 145.
  • the optical system 14 comprises 4 fixing clips, two of which are distributed on one side of the optical system and two others on the opposite side, so as to have better fixing of the support 12.
  • the optical system 14 is a single piece.
  • the optical system 14 is made of synthetic polymer material.
  • the optical system 14 is produced by injection molding of synthetic polymer material.
  • the material is polycarbonate (PC) or polymethyl methacrylate (PMMA).
  • the primary optical element 140 is illustrated in the figures 3b to 7 .
  • FIG. 5a it comprises a windscreen 143 which cooperates with a light source 13 to collimate the light rays R generated in the direction of the secondary optical element 141 and in the direction of the connecting bridges 142 distributed on either side of the light source 13.
  • Windscreen 143 is placed facing a light source 13.
  • Windscreen 143 is curved.
  • the bonnet 143 is curved over a sector between 90° and 180° so as to collect a major part of the light rays R emitted by the light source 13.
  • Windscreen 143 includes an entry face 143a and an exit face 143b.
  • the entry face 143a and the exit face 143b are smooth.
  • the input face 143a comprises Fresnel steps. The two non-limiting embodiments make it possible to collimate substantially vertically the light rays R coming from the light sources 13 towards the secondary optical element 141, namely perpendicular to the Y axis, and horizontally said light rays R towards the secondary optical element 141, namely along a plane parallel to the Y axis.
  • the primary optical element 140 comprises a plurality of windscreens 143. In the non-limiting example illustrated on the figure 3b , it comprises 16 windshields 143 each cooperating respectively with the 16 light sources 13.
  • the secondary optical element 141 is illustrated in the figures 3b to 7 .
  • the secondary optical element 141 is arranged facing the primary optical element 140 so as to receive the light rays R collimated by the primary optical element 140.
  • the primary optical element 140 is placed between the primary optical element 140 and the output lens 11. Like the primary optical element 140, it is formed from a transparent or translucent material, similar to a lens.
  • the input face 141a is oriented towards the light sources 13. As illustrated in the figure 5a , it includes Fresnel 141c steps. The latter are configured to vertically collimate the light rays R coming from the light sources 13 and having passed through the windshield 143 so that on the exit face 141b the light rays R are oriented parallel to the optical emission axis X.
  • the Fresnel steps extend substantially vertically relative to the plane of the secondary optical element 141. In other words, they are perpendicular to the main direction Y.
  • the exit face 141b faces the exit window 11.
  • the light beam F formed by the light rays R leaves the exit window 11 to illuminate the rear of the rear window 3.
  • Link bridge 142 is shown in the figures 3b to 7 .
  • the connecting bridge 142 is configured to secure the two parts of the optical system 14, namely the primary optical element 140 and the secondary optical element 141.
  • the optical system 14 comprises a plurality of link bridges 142. In the non-limiting example illustrated in the figure 4 , it includes 7 connecting bridges 142.
  • said at least one connecting bridge 142 is full. It does not include any openings, as in the case of the figure 5b , which allows it to be more robust and cool evenly.
  • the connecting bridge 142 serves as an injection point to inject the synthetic polymeric material.
  • the optical system 14 includes other connecting bridges 144 illustrated in the figure 4 having an opening 148 illustrated on the figure 5b .
  • These other connecting bridges 144 do not need to have optical patterns 142a because they make it possible to reflect the light rays R coming from the light sources 13 in the direction of the exit face 141b which extends said connecting bridges 144 so that there are no gray areas here.
  • the connecting bridge 142 comprises at least one optical structure 142a.
  • the optical structure 142a comprises an input face 142b substantially perpendicular to a part R1 of the light rays R passing through said primary optical element 140, in particular passing through the windshield 143, so that they propagate with a minimum of refraction through said at least one connecting bridge 142 to said exit face 141b.
  • the input face 142b is perpendicular to the light rays R11 joining the light source 13 at the corner of the connecting bridge 142 with the upper face of the Fresnel steps 141c.
  • a single light ray R11 has been illustrated. These light rays R11 are not deflected by refraction. Others light rays from part R1 are deflected very little by refraction so that there is very little loss of light on the exit face 141c.
  • the optical structure 142a projects from said at least one connecting bridge 142. This makes it possible, while retaining the mass and therefore the resistance of said connecting bridge 142, to add to it a a part R1 of the light rays R to direct them without refraction towards an exit face 141b.
  • the added projecting shape of the optical structure 142a forms a three-sided fin.
  • One of these sides is attached to the connecting bridge 142.
  • Another side is the input face 142b such that a part R1 of the light rays R arrives on it substantially perpendicularly. This allows the R1 portion of the R light rays not to be deflected by refraction as they enter the bonding bridge material 142.
  • the last side is configured to be parallel to the R1 portion of the R light rays. the light rays R do not strike this face and therefore do not modify their trajectory in the connecting bridge 142.
  • the optical structure 142a is made of the same material as the connecting bridge 142 so that the light rays R1 that pass through them are not globally deflected by refraction. Thus, only a small fraction of the light rays R1 will be deflected.
  • the part R1 of the light rays R coming from the light source 13 and having passed through the primary optical element 140 propagates substantially in a straight line with a minimum of refraction through said connecting bridge 142 to the exit face 141b of the secondary optical element 141.
  • said at least one optical structure 142a is of the same thickness e as said at least one connecting bridge 142. This makes it possible to recover all the light rays R propagating in the connecting bridge 142 and to prevent their deflection by refraction so that there are no more gray areas observed at the exit glass 11, due to the absence of light rays R at the level of the connecting bridge 142 on the exit face 141b of the secondary optical element 141. exit 141b which extends connecting bridge 142.
  • a connecting bridge 142 is surrounded by two light sources 13.
  • each connecting bridge 142 is surrounded by two light sources bright 13.
  • the output face 141b comprises prisms 143 at the level of the connecting bridge 142 so as to rectify along the optical emission axis X the light rays R1 originating from the secondary optical element 141.
  • the light rays R1 which have passed through the connecting bridge 142 arrive at the exit face 141b and are straightened by the prisms 143 and oriented parallel to the optical emission axis X.
  • Said prisms 143 are located on the exit face 141b, on the side opposite to that where the connecting bridge 142 is contiguous with the entrance face 141a.
  • said prisms 143 have the same thickness e as said at least one connecting bridge 142. This makes it possible to recover all of the light rays R1 originating from connecting bridge 142.
  • the prisms 143 are oriented so as to refract the light rays R1 coming from the connecting bridge 142 along an axis of movement of the motor vehicle 2, which is parallel to the axis of optical emission X.
  • the prisms 143 s 'extend perpendicular to the main direction Y. It will be noted that the rays R11 seen previously are unfortunately lost.
  • the output face 141b comprises prisms 143 divided into two sets 143a, 143b, one of which 143a is configured to redirect the light rays R1 coming from the first optical structure 142a and the other 143b is configured to redirect the light rays R1 coming from the second optical structure 142a.
  • the right group 143b redirects the light rays R1 coming from the optical structure 142a on the left
  • the left group 143a redirects the light rays R1 coming from the optical structure 142a on the right.
  • said light device 1 is an interior lighting device comprising a case closed by transparent or translucent glass.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

La présente invention concerne un dispositif lumineux pour véhicule automobile.The present invention relates to a lighting device for a motor vehicle.

Elle trouve une application particulière mais non limitative dans les feux de stop surélevés pour véhicule automobile.It finds a particular but non-limiting application in raised stop lights for motor vehicles.

ARRIÈRE-PLAN TECHNOLOGIQUE DE L'INVENTIONTECHNOLOGICAL BACKGROUND OF THE INVENTION

Un dispositif lumineux pour véhicule automobile comprend de manière connue de l'homme du métier :

  • un boîtier ;
  • un support comprenant au moins une source lumineuse configurée pour émettre des rayons lumineux ;
  • un système optique configuré pour former un faisceau lumineux suivant un axe d'émission optique à partir desdits rayons lumineux, et comprenant :
    • un élément optique primaire disposé en partie en regard de ladite au moins une source lumineuse ;
    • un élément optique secondaire disposé en regard dudit élément optique primaire, relié avec ledit un élément optique primaire via au moins un pont de liaison et comprenant une face d'entrée avec des échelons de Fresnel et une face de sortie.
A luminous device for a motor vehicle comprises, in a manner known to those skilled in the art:
  • a housing ;
  • a support comprising at least one light source configured to emit light rays;
  • an optical system configured to form a light beam along an optical emission axis from said light rays, and comprising:
    • a primary optical element placed partly opposite said at least one light source;
    • a secondary optical element arranged facing said primary optical element, connected with said one primary optical element via at least one connecting bridge and comprising an input face with Fresnel steps and an output face.

Le dispositif lumineux est configuré pour être monté sur la lunette arrière de véhicule automobile.The light device is configured to be mounted on the rear window of a motor vehicle.

Un inconvénient de cet état de la technique antérieur est que du fait de la présence dudit au moins un pont de liaison, les rayons lumineux de ladite au moins une source lumineuse sont déviés ce qui créé des zones d'ombre, référencées S sur la figure 1 (sur laquelle la lumière est représentée en noir et les zones d'ombre en blanc), qui peuvent être observées par une personne qui regarde la lunette arrière du véhicule automobile. Le pont de liaison est ainsi le siège de pertes lumineuses ainsi que d'inhomogénéités dans le faisceau lumineux formé par les rayons lumineux. EP 2 317 214 A1 , DE 10 2011 002483 A1 , US 2013/021815 A1 et EP 2 587 120 A1 divulguent des dispositifs lumineux connus de l'art antérieur.A drawback of this state of the prior art is that due to the presence of said at least one connecting bridge, the light rays from said at least one light source are deflected which creates shadow areas, referenced S on the figure 1 (on which the light is represented in black and the shaded areas in white), which can be observed by a person looking at the rear window of the motor vehicle. The connecting bridge is thus the site of light losses as well as inhomogeneities in the light beam formed by the light rays. EP 2 317 214 A1 , DE 10 2011 002483 A1 , US 2013/021815 A1 and EP 2 587 120 A1 disclose light devices known from the prior art.

Dans ce contexte, la présente invention vise à proposer un dispositif lumineux pour véhicule automobile qui permet de résoudre l'inconvénient mentionné.In this context, the present invention aims to propose a luminous device for a motor vehicle which makes it possible to solve the drawback mentioned.

DESCRIPTION GÉNÉRALE DE L'INVENTIONGENERAL DESCRIPTION OF THE INVENTION

A cette fin, l'invention propose un dispositif lumineux pour véhicule automobile, ledit dispositif lumineux comprenant :

  • un boîtier ;
  • un support comprenant au moins une source lumineuse configurée pour émettre des rayons lumineux ;
  • un système optique configuré pour former un faisceau lumineux suivant un axe d'émission optique à partir desdits rayons lumineux, et comprenant :
    • un élément optique primaire disposé en partie en regard de ladite au moins une source lumineuse ;
    • un élément optique secondaire disposé en regard dudit élément optique primaire, relié avec ledit un élément optique primaire via au moins un pont de liaison et comprenant une face d'entrée avec des échelons de Fresnel et une face de sortie ;
To this end, the invention proposes a luminous device for a motor vehicle, said luminous device comprising:
  • a housing ;
  • a support comprising at least one light source configured to emit light rays;
  • an optical system configured to form a light beam along an optical emission axis from said light rays, and comprising:
    • a primary optical element placed partly opposite said at least one light source;
    • a secondary optical element arranged facing said primary optical element, connected with said one primary optical element via at least one connecting bridge and comprising an input face with Fresnel steps and an output face;

Caractérisé en ce que ledit au moins un pont de liaison comprend au moins une structure optique avec une face d'entrée sensiblement perpendiculaire à une partie des rayons lumineux traversant ledit élément optique primaire, ladite face de sortie dudit élément optique secondaire comprenant des prismes au niveau dudit au moins un pont de liaison de sorte à redresser selon ledit axe d'émission optique les rayons lumineux provenant dudit élément optique secondaire après avoir traversé le pont de liaison.Characterized in that said at least one connecting bridge comprises at least one optical structure with an input face substantially perpendicular to part of the light rays passing through said primary optical element, said output face of said secondary optical element comprising prisms at of said at least one connecting bridge so as to straighten along said optical emission axis the light rays coming from said secondary optical element after having crossed the connecting bridge.

Ainsi grâce à la structure optique, les rayons lumineux qui ont traversés l'élément optique primaire vont se propager au travers dudit au moins un pont de liaison jusqu'à la face de sortie de l'élément optique secondaire avec un minimum de réfraction de sorte qu'il y a très peu de perte de lumière et aucune zone d'ombre au niveau du pont de liaison. La lumière est ainsi diffusée de façon homogène.Thus, thanks to the optical structure, the light rays which have passed through the primary optical element will propagate through said at least one connecting bridge to the output face of the optical element. secondary with minimal refraction so there is very little light loss and no shadow areas at the connecting bridge. The light is thus diffused evenly.

Selon des modes de réalisation non limitatifs, ledit dispositif lumineux peut comporter en outre une ou plusieurs caractéristiques supplémentaires prises seules ou selon toutes les combinaisons techniquement possibles, parmi les suivantes :

  • Selon un mode de réalisation non limitatif, ladite au moins une structure optique est en saillie dudit au moins un pont de liaison.
  • Selon un mode de réalisation non limitatif, ladite au moins une structure optique forme une ailette.
  • Selon un mode de réalisation non limitatif, ladite au moins une structure optique est de même épaisseur que ledit au moins un pont de liaison.
  • Selon un mode de réalisation non limitatif, ledit au moins un pont de liaison est plein.
  • Selon un mode de réalisation non limitatif, les prismes sont orientés de manière à réfracter les rayons lumineux provenant dudit au moins un pont de liaison suivant un axe de déplacement du véhicule automobile.
  • Selon un mode de réalisation non limitatif, ledit dispositif lumineux comprend une pluralité de sources lumineuses et une pluralité de ponts de liaison, un pont de liaison étant entouré par deux sources lumineuses.
  • Selon un mode de réalisation non limitatif, chaque pont de liaison comprend deux motifs optiques dont :
    • une première structure optique avec une face d'entrée perpendiculaire à une partie des rayons lumineux émis par l'une des deux sources lumineuses entourant ledit pont de liaison ; et
    • une deuxième structure optique avec une face d'entrée perpendiculaire à une partie des rayons lumineux émis par l'autre des deux sources lumineuses.
  • Selon un mode de réalisation non limitatif, les prismes sont répartis en deux ensembles dont l'un est configuré pour réorienter les rayons lumineux provenant de la première structure optique et l'autre est configuré pour réorienter les rayons lumineux provenant de la deuxième structure optique.
  • Selon un mode de réalisation non limitatif, le système optique est en matière polymère synthétique.
  • Selon un mode de réalisation non limitatif, ledit dispositif lumineux est un feu de stop surélevé.
According to non-limiting embodiments, said light device may also comprise one or more additional characteristics taken alone or according to all technically possible combinations, among the following:
  • According to a non-limiting embodiment, said at least one optical structure projects from said at least one connecting bridge.
  • According to a non-limiting embodiment, said at least one optical structure forms a fin.
  • According to a non-limiting embodiment, said at least one optical structure is of the same thickness as said at least one connecting bridge.
  • According to a non-limiting embodiment, said at least one connecting bridge is solid.
  • According to a non-limiting embodiment, the prisms are oriented so as to refract the light rays coming from said at least one connecting bridge along an axis of movement of the motor vehicle.
  • According to a non-limiting embodiment, said light device comprises a plurality of light sources and a plurality of connecting bridges, a connecting bridge being surrounded by two light sources.
  • According to a non-limiting embodiment, each connecting bridge comprises two optical patterns including:
    • a first optical structure with an input face perpendicular to part of the light rays emitted by one of the two light sources surrounding said connecting bridge; and
    • a second optical structure with an input face perpendicular to part of the light rays emitted by the other of the two light sources.
  • According to a non-limiting embodiment, the prisms are divided into two sets, one of which is configured to redirect the light rays coming from the first optical structure and the other is configured to redirect the light rays coming from the second optical structure.
  • According to a non-limiting embodiment, the optical system is made of synthetic polymer material.
  • According to a non-limiting embodiment, said light device is a raised brake light.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF FIGURES

L'invention et ses différentes applications seront mieux comprises à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent :

  • la figure 1 représente une vue de face d'une répartition de la lumière du faisceau lumineux généré par un dispositif lumineux pour véhicule automobile de l'état de la technique antérieur, au travers d'une glace de sortie ;
  • la figure 2 représente une vue arrière d'un véhicule automobile équipé d'un dispositif lumineux, selon un mode de réalisation non limitatif de l'invention ;
  • la figure 3a illustre une vue assemblée du dispositif lumineux de la figure 2, selon un mode de réalisation non limitatif ;
  • la figure 3b illustre une vue éclatée du dispositif lumineux de la figure 3a, ledit dispositif lumineux comprenant un boîtier, une glace de sortie, au moins une source lumineuse, et un système optique, selon un mode de réalisation non limitatif ;
  • la figure 4 illustre une vue du système optique du dispositif lumineux de la figure 3b, ledit système optique comprenant un élément optique primaire et un élément optique secondaire reliés par au moins un point de liaison, selon un mode de réalisation non limitatif ;
  • la figure 5a est une vue zoomée de deux sources lumineuses et d'une partie du système optique du dispositif lumineux des figures 3a à 4, selon l'invention;
  • la figure 5b est une vue zoomée de deux sources lumineuses et d'une autre partie du système optique du dispositif lumineux des figures 3a à 4, selon un mode de réalisation non limitatif ;
  • la figure 6a représente une vue en perspective des deux sources lumineuses et de la partie du système optique de la figure 5a, selon un mode de réalisation non limitatif ;
  • la figure 6b représente une vue en perspective de dessous de la vue de la figure 6a, selon un mode de réalisation non limitatif ;
  • la figure 7 représente un schéma des rayons lumineux émis par ladite au moins une source lumineuse du dispositif lumineux et traversant ledit système optique dudit dispositif lumineux de la figure 5a, selon un mode de réalisation non limitatif.
The invention and its various applications will be better understood on reading the following description and on examining the accompanying figures:
  • the figure 1 represents a front view of a distribution of the light of the light beam generated by a lighting device for a motor vehicle of the state of the prior art, through an output lens;
  • the figure 2 shows a rear view of a motor vehicle equipped with a light device, according to a non-limiting embodiment of the invention;
  • the picture 3a illustrates an assembled view of the light device of the figure 2 , according to a non-limiting embodiment;
  • the figure 3b illustrates an exploded view of the light device of the picture 3a , said light device comprising a housing, an output lens, at least one light source, and an optical system, according to one non-limiting embodiment;
  • the figure 4 illustrates a view of the optical system of the light device of the figure 3b , said optical system comprising a primary optical element and a secondary optical element connected by at least one connection point, according to a non-limiting embodiment;
  • the figure 5a is a zoomed view of two light sources and part of the optical system of the light device of the figures 3a to 4 , according to the invention;
  • the figure 5b is a zoomed view of two light sources and another part of the optical system of the light device of the figures 3a to 4 , according to a non-limiting embodiment;
  • the figure 6a shows a perspective view of the two light sources and part of the optical system of the figure 5a , according to a non-limiting embodiment;
  • the figure 6b represents a perspective view from below of the view of the figure 6a , according to a non-limiting embodiment;
  • the figure 7 represents a diagram of the light rays emitted by said at least one light source of the light device and passing through said optical system of said light device of the figure 5a , according to a non-limiting embodiment.

DESCRIPTIF DE MODES DE REALISATION DE L'INVENTIONDESCRIPTION OF EMBODIMENTS OF THE INVENTION

Les éléments identiques, par structure ou par fonction, apparaissent sur les différentes figures conservent, sauf précision contraire, les mêmes références.Identical elements, by structure or by function, appearing in the various figures retain, unless otherwise specified, the same references.

Dans la description qui va suivre, les notions de verticalité et d'horizontalité sont exprimées lorsque le dispositif lumineux est orienté selon une position de montage sur le véhicule.In the following description, the concepts of verticality and horizontality are expressed when the light device is oriented according to a mounting position on the vehicle.

Le dispositif lumineux 1 pour véhicule automobile selon l'invention est décrit en référence aux figures 2 à 7.The luminous device 1 for a motor vehicle according to the invention is described with reference to the figures 2 to 7 .

Par véhicule automobile, on entend tout type de véhicule motorisé.Motor vehicle means any type of motorized vehicle.

Dans un mode de réalisation non limitatif, le dispositif lumineux 1 est un feu de signalisation.In a non-limiting embodiment, the light device 1 is a traffic light.

La figure 2 est une vue de l'arrière d'un véhicule automobile 2. De manière classique et connue, le véhicule automobile 2 comprend une lunette arrière 3, cette dernière pouvant être fixe sur la carrosserie ou être sur un ouvrant arrière tel qu'un hayon arrière.The figure 2 is a view of the rear of a motor vehicle 2. In a conventional and known manner, the motor vehicle 2 comprises a rear window 3, the latter possibly being fixed to the bodywork or being on a rear opening such as a rear hatch .

Dans un mode de réalisation non limitatif, le dispositif lumineux 1 est disposé en haut de la lunette arrière 3. Dans un mode de réalisation non limitatif, il s'agit d'un feu stop, couramment appelé « troisième feu stop », ou feu de stop surélevé, en référence aux deux feux stop classiques disposés plus bas à gauche et à droite. Le « troisième feu stop » ou feu de stop surélevé est également désigné CHMSL, acronyme de l'expression anglo-saxonne « Center High-Mounted Stop Light ».In one non-limiting embodiment, the light device 1 is arranged at the top of the rear window 3. In one non-limiting embodiment, it is a stop light, commonly called "third stop light", or raised stop light, in reference to the two classic stop lights arranged lower on the left and on the right. The “third stop light” or high-mounted stop light is also designated CHMSL, an acronym for the English expression “Center High-Mounted Stop Light”.

Un tel feu de stop surélevé peut également être installé en bas de la lunette arrière, sur la plage arrière ou monté dans la carrosserie, au-dessus de la lunette arrière ou encore au sommet de la malle de coffre.Such a raised brake light can also be installed at the bottom of the rear window, on the parcel shelf or mounted in the bodywork, above the rear window or even at the top of the trunk.

Dans un mode de réalisation non limitatif, le dispositif lumineux 1 est configuré pour être placé derrière la lunette arrière 3. Dans ce cas, il comporte un boîtier dont l'ouverture est fermée par la lunette arrière.In one non-limiting embodiment, the light device 1 is configured to be placed behind the rear window 3. In this case, it comprises a case whose opening is closed by the rear window.

Dans un autre mode de réalisation non limitatif, le dispositif lumineux 1 est configuré pour être intégré dans la carrosserie. Dans ce cas, il comporte un boîtier fermé par une glace de sortie. Ce mode de réalisation non limitatif est pris comme exemple non limitatif dans la suite de la description.In another non-limiting embodiment, the light device 1 is configured to be integrated into the bodywork. In this case, it comprises a box closed by an outlet lens. This non-limiting embodiment is taken as a non-limiting example in the remainder of the description.

Dans un mode de réalisation non limitatif, le dispositif lumineux 1 s'étend suivant une direction principale Y (illustrée sur les figures 2 et 3a) qui correspond à l'horizontale lorsqu'il est en position de montage sur le véhicule automobile 2. Le dispositif lumineux 1 éclaire selon une direction longitudinale au véhicule automobile 2 orientée vers l'arrière et selon un axe d'émission optique X (illustré sur la figure 4) proche de l'horizontal, de sorte qu'un observateur se trouvant dans l'axe d'émission optique X et à proximité de cet axe d'émission optique X puisse voir le faisceau lumineux émis par le dispositif lumineux 1.In a non-limiting embodiment, the luminous device 1 extends along a main direction Y (illustrated on the figures 2 and 3a ) which corresponds to the horizontal when it is in the mounting position on the motor vehicle 2. The light device 1 illuminates in a direction longitudinal to the motor vehicle 2 oriented towards the rear and along an optical emission axis X (illustrated on the figure 4 ) close to the horizontal, so that an observer located in the optical emission axis X and close to this optical emission axis X can see the light beam emitted by the light device 1.

Tel qu'illustré sur les figures 3a et 3b, le dispositif lumineux 1 comprend :

  • un boîtier 10 ;
  • une glace de sortie 11 ;
  • un support 12 comprenant au moins une source lumineuse 13 ;
  • un système optique 14 comprenant :
    • un élément optique primaire 140 ;
    • un élément optique secondaire 141 relié avec ledit un élément optique primaire 140 via au moins un pont de liaison 142.
As shown on the figure 3a and 3b , the light device 1 comprises:
  • a housing 10;
  • an outlet mirror 11;
  • a support 12 comprising at least one light source 13;
  • an optical system 14 comprising:
    • a primary optical element 140;
    • a secondary optical element 141 connected with said one primary optical element 140 via at least one connecting bridge 142.

Les éléments du dispositif lumineux 1 sont décrits en détail ci-après.The elements of the light device 1 are described in detail below.

• Boîtier 10• Box 10

Tel qu'illustré sur les figures 3a, 3b, le boîtier 10 est configuré pour recevoir le support 12 avec ladite au moins une source lumineuse 13, et le système optique 14.As shown on the figure 3a , 3b , the housing 10 is configured to receive the support 12 with said at least one light source 13, and the optical system 14.

Dans un mode de réalisation non limitatif, le dispositif lumineux 1 est maintenu dans le véhicule automobile 2 au moyen de son boîtier. Ce dernier est fixé à la carrosserie via des trous (non illustrés) réalisés dans la carrosserie.In a non-limiting embodiment, the luminous device 1 is held in the motor vehicle 2 by means of its casing. The latter is fixed to the body via holes (not shown) made in the body.

• Glace de sortie 11• Exit window 11

La glace de sortie 11 est configurée pour fermer le boîtier 10 de façon étanche à la poussière et l'humidité.The exit lens 11 is configured to close the case 10 in a dust- and moisture-tight manner.

Elle est solidarisée dudit boîtier 10. Dans un mode de réalisation non limitatif, ladite glace de sortie 11 est collée audit boîtier 10.It is secured to said casing 10. In one non-limiting embodiment, said exit lens 11 is glued to said casing 10.

La glace de sortie 11 est configurée pour être plaquée contre la lunette arrière 3. Dans un mode de réalisation non limitatif, elle est maintenue sur la carrosserie du véhicule automobile 2 au moyen d'un film adhésif 110 illustré sur la figure 3a. Cela permet de maintenir l'ensemble du dispositif lumineux 1 dans le véhicule automobile 2.The exit glass 11 is configured to be pressed against the rear window 3. In one non-limiting embodiment, it is held on the body of the motor vehicle 2 by means of an adhesive film 110 illustrated on the picture 3a . This makes it possible to maintain the whole of the luminous device 1 in the motor vehicle 2.

La glace de sortie 11 est composée d'une face orientée vers l'extérieur à travers de laquelle sort le faisceau lumineux du dispositif lumineux 1.The output glass 11 is composed of a face facing outwards through which the light beam of the light device 1 emerges.

Dans un mode de réalisation non limitatif, la glace de sortie 11 est transparente ou translucide. Elle peut être teintée en rouge. Elle est dépourvue d'une paroi opaque.In a non-limiting embodiment, the outlet lens 11 is transparent or translucent. It can be tinted red. It has no opaque wall.

∘ Support 12 et source lumineuse 13∘ Support 12 and light source 13

Le support 12 est illustré sur les figures 3b et 4.Bracket 12 is shown in the figure 3b and 4 .

Il est disposé dans le boîtier 10.It is placed in the box 10.

Le support 12 comprend au moins une source lumineuse 13 configurée pour émettre des rayons lumineux R.The support 12 comprises at least one light source 13 configured to emit light rays R.

Il comprend un connecteur électrique 120 (illustré sur la figure 4) qui permet de le relier électriquement à un réseau électrique du véhicule automobile 2.It includes a 120 electrical connector (shown on the figure 4 ) which makes it possible to connect it electrically to an electrical network of the motor vehicle 2.

Dans un mode de réalisation non limitatif, le support 12 est un support de circuit imprimé, également désigné PCBA, acronyme de l'expression anglo-saxonne « Printed Circuit Board Assembly».In one non-limiting embodiment, the support 12 is a printed circuit support, also designated PCBA, an acronym for the English expression “Printed Circuit Board Assembly”.

Dans un mode de réalisation non limitatif, ladite source lumineuse 13 est une source lumineuse à semi-conducteur. Dans une variante de réalisation non limitative, ladite source lumineuse à semi-conducteur 13 fait partie d'une diode électroluminescente. Par diode électroluminescente, on entend tout type de diodes électroluminescentes, que ce soit dans des exemples non limitatifs des LED (« Light Emitting Diode »), des OLED (« organic LED »), des AMOLED (Active-Matrix-Organic LED), ou encore des FOLED (Flexible OLED).In a non-limiting embodiment, said light source 13 is a semiconductor light source. In a non-limiting alternative embodiment, said semiconductor light source 13 forms part of a light-emitting diode. By light-emitting diode, we mean any type of light-emitting diode, whether in non-limiting examples LED (“Light Emitting Diode”), OLED (“organic LED”), AMOLED (Active-Matrix-Organic LED), or FOLED (Flexible OLED).

Ladite source lumineuse 13 est configurée pour générer un rayon lumineux R dans une direction parallèle à l'axe d'émission optique 12 du dispositif lumineux 1.Said light source 13 is configured to generate a light ray R in a direction parallel to the optical emission axis 12 of the light device 1.

Dans un mode de réalisation non limitatif, le dispositif lumineux 1 comprend une pluralité de sources lumineuses 13. Dans l'exemple non limitatif illustré sur la figure 3b, il comprend 16 sources lumineuses 13. Ce mode de réalisation non limitatif est pris comme exemple non limitatif dans la suite de la description.In a non-limiting embodiment, the light device 1 comprises a plurality of light sources 13. In the non-limiting example illustrated in the figure 3b , it comprises 16 light sources 13. This non-limiting embodiment is taken as a non-limiting example in the remainder of the description.

Les sources lumineuses 13 sont disposées côte à côte et réparties selon la direction principale Y du dispositif lumineux 1.The light sources 13 are arranged side by side and distributed along the main direction Y of the light device 1.

Les sources lumineuses 13 sont configurées pour générer des rayons lumineux R qui vont coopérer avec le système optique 14 décrit ci-après. L'ensemble des rayons lumineux R des sources lumineuses 13 forment le faisceau lumineux F du dispositif lumineux 1. Par souci de simplification, seuls les rayons lumineux R de quelques sources lumineuses 13 ont été représentés sur la figure 3b.The light sources 13 are configured to generate light rays R which will cooperate with the optical system 14 described below. All of the light rays R of the light sources 13 form the light beam F of the light device 1. For the sake of simplification, only the light rays R of a few light sources 13 have been represented on the figure 3b .

∘ Système optique 14∘ Optical system 14

Le système optique 14 est illustré sur les figures 3b à 7.The optical system 14 is illustrated in the figures 3b to 7 .

Il est composé :

  • d'un élément optique primaire 140 disposé en partie en regard de ladite au moins une source lumineuse 13 ;
  • d'un élément optique secondaire 141 disposé en regard dudit élément optique primaire 140, relié avec ledit un élément optique primaire 140 via au moins un pont de liaison 142.
It is composed :
  • a primary optical element 140 arranged partly opposite said at least one light source 13;
  • of a secondary optical element 141 arranged facing said primary optical element 140, connected with said one primary optical element 140 via at least one connecting bridge 142.

Le système optique 14 est configuré pour former un faisceau lumineux F suivant l'axe d'émission optique X à partir des rayons lumineux R des sources lumineuses 13.The optical system 14 is configured to form a light beam F along the optical emission axis X from the light rays R of the light sources 13.

Il est ainsi configuré pour répartir les rayons lumineux R issues des sources lumineuses 13 de telle sorte que le faisceau lumineux F qui sort de la glace de sortie 11 soit la plus homogène possible.It is thus configured to distribute the light rays R coming from the light sources 13 so that the light beam F which comes out of the output lens 11 is as homogeneous as possible.

Le système optique 14 est solidarisé du support 12 et maintenu à distance dudit support 12. Dans un mode de réalisation non limitatif, il est solidarisé avec le support 12 avec au moins un clip 145 (illustré sur les figures 4 et 5b). Dans une variante de réalisation non limitative, il comprend une pluralité de clips de fixation 145.The optical system 14 is secured to the support 12 and kept at a distance from said support 12. In one non-limiting embodiment, it is secured to the support 12 with at least one clip 145 (illustrated on the figure 4 and 5b ). In a non-limiting embodiment variant, it comprises a plurality of fixing clips 145.

Dans l'exemple non limitatif illustré sur la figure 4, il comprend 4 clips de fixation, dont deux sont réparties d'un côté du système optique et deux autres du côté opposé, de sorte à avoir une meilleure fixation du support 12. Dans un mode de réalisation non limitatif, le système optique 14 est une pièce unique.In the non-limiting example illustrated in the figure 4 , it comprises 4 fixing clips, two of which are distributed on one side of the optical system and two others on the opposite side, so as to have better fixing of the support 12. In a non-limiting embodiment, the optical system 14 is a single piece.

Dans un mode de réalisation non limitatif, le système optique 14 est en matière polymère synthétique.In a non-limiting embodiment, the optical system 14 is made of synthetic polymer material.

Dans un mode de réalisation non limitatif, le système optique 14 est réalisé par moulage par injection de matière polymère synthétique.In a non-limiting embodiment, the optical system 14 is produced by injection molding of synthetic polymer material.

Dans une variante de réalisation non limitative, la matière est du polycarbonate (PC) ou du polyméthacrylate de méthyle (PMMA).In a non-limiting embodiment variant, the material is polycarbonate (PC) or polymethyl methacrylate (PMMA).

∘ Elément optique primaire 140∘ Primary optical element 140

L'élément optique primaire 140 est illustré sur les figures 3b à 7.The primary optical element 140 is illustrated in the figures 3b to 7 .

Il est disposé en partie en regard des sources lumineuses 13 du support 12.It is arranged partly opposite the light sources 13 of the support 12.

Il est formé d'un matériau transparent ou translucide, similaire à une lentille.It is made of a transparent or translucent material, similar to a lens.

Tel qu'illustré sur la figure 5a, il comprend un bonnette 143 qui coopère avec une source lumineuse 13 pour collimater les rayons lumineux R générés en direction de l'élément optique secondaire 141 et en direction des ponts de liaison 142 répartis de part et d'autre de la source lumineuse 13.As shown on the figure 5a , it comprises a windscreen 143 which cooperates with a light source 13 to collimate the light rays R generated in the direction of the secondary optical element 141 and in the direction of the connecting bridges 142 distributed on either side of the light source 13.

La bonnette 143 est disposée en regard d'une source lumineuse 13.Windscreen 143 is placed facing a light source 13.

La bonnette 143 est courbe. Dans un mode de réalisation non limitatif, la bonnette 143 est courbe sur un secteur compris entre 90° et 180° de manière à collecter une majeure partie des rayons lumineux R émis par la source lumineuse 13.Windscreen 143 is curved. In a non-limiting embodiment, the bonnet 143 is curved over a sector between 90° and 180° so as to collect a major part of the light rays R emitted by the light source 13.

La bonnette 143 comprend une face d'entrée 143a et une face de sortie 143b. Dans un mode de réalisation non limitatif, la face d'entrée 143a et la face de sortie 143b sont lisses. Dans un autre mode de réalisation non limitatif non illustré, la face d'entrée 143a comprend des échelons de Fresnel. Les deux modes de réalisation non limitatifs permettent de collimater sensiblement verticalement les rayons lumineux R provenant des sources lumineuses 13 vers l'élément optique secondaire 141, à savoir perpendiculairement à l'axe Y, et horizontalement lesdits rayons lumineux R vers l'élément optique secondaire 141, à savoir selon un plan parallèle à l'axe Y.Windscreen 143 includes an entry face 143a and an exit face 143b. In a non-limiting embodiment, the entry face 143a and the exit face 143b are smooth. In another non-limiting embodiment not illustrated, the input face 143a comprises Fresnel steps. The two non-limiting embodiments make it possible to collimate substantially vertically the light rays R coming from the light sources 13 towards the secondary optical element 141, namely perpendicular to the Y axis, and horizontally said light rays R towards the secondary optical element 141, namely along a plane parallel to the Y axis.

Dans un mode de réalisation non limitatif, l'élément optique primaire 140 comprend une pluralité de bonnettes 143. Dans l'exemple non limitatif illustré sur la figure 3b, il comprend 16 bonnettes 143 chacun coopérant respectivement avec les 16 sources lumineuses 13.In a non-limiting embodiment, the primary optical element 140 comprises a plurality of windscreens 143. In the non-limiting example illustrated on the figure 3b , it comprises 16 windshields 143 each cooperating respectively with the 16 light sources 13.

∘ Elément optique secondaire 141∘ Secondary optical element 141

L'élément optique secondaire 141 est illustré sur les figures 3b à 7. L'élément optique secondaire 141 est disposé en regard de l'élément optique primaire 140 de sorte à recevoir les rayons lumineux R collimatés par l'élément optique primaire 140.The secondary optical element 141 is illustrated in the figures 3b to 7 . The secondary optical element 141 is arranged facing the primary optical element 140 so as to receive the light rays R collimated by the primary optical element 140.

Il est disposé entre l'élément optique primaire 140 et la glace de sortie 11. Tout comme l'élément optique primaire 140, il est formé d'un matériau transparent ou translucide, similaire à une lentille.It is placed between the primary optical element 140 and the output lens 11. Like the primary optical element 140, it is formed from a transparent or translucent material, similar to a lens.

Il est sensiblement plan et s'étend selon la direction principale Y du dispositif lumineux 1.It is substantially flat and extends along the main direction Y of the light device 1.

L'élément optique secondaire 141 comprend :

  • une face d'entrée 141a
  • une face de sortie 141b.
The secondary optical element 141 comprises:
  • an entrance face 141a
  • an exit face 141b.

La face d'entrée 141a est orientée vers les sources lumineuses 13. Tel qu'illustré sur la figure 5a, elle comprend des échelons de Fresnel 141c. Ces derniers sont configurés pour collimater verticalement les rayons lumineux R provenant des sources lumineuses 13 et ayant traversés la bonnette 143 de sorte que sur la face de sortie 141b les rayons lumineux R soit orientés parallèlement à l'axe d'émission optique X.The input face 141a is oriented towards the light sources 13. As illustrated in the figure 5a , it includes Fresnel 141c steps. The latter are configured to vertically collimate the light rays R coming from the light sources 13 and having passed through the windshield 143 so that on the exit face 141b the light rays R are oriented parallel to the optical emission axis X.

Les échelons de Fresnel s'étendent sensiblement verticalement par rapport au plan de l'élément optique secondaire 141. Autrement dit, ils sont perpendiculaires à la direction principale Y.The Fresnel steps extend substantially vertically relative to the plane of the secondary optical element 141. In other words, they are perpendicular to the main direction Y.

La face de sortie 141b fait face à la glace de sortie 11. Ainsi, le faisceau lumineux F formé par les rayons lumineux R sort de la glace de sortie 11 pour éclairer à l'arrière de la lunette arrière 3.The exit face 141b faces the exit window 11. Thus, the light beam F formed by the light rays R leaves the exit window 11 to illuminate the rear of the rear window 3.

∘ Pont de liaison 142∘ Connecting bridge 142

Le pont de liaison 142 est illustré sur les figures 3b à 7.Link bridge 142 is shown in the figures 3b to 7 .

Le pont de liaison 142 est configuré pour solidariser les deux parties du système optique 14, à savoir l'élément optique primaire 140 et l'élément optique secondaire 141.The connecting bridge 142 is configured to secure the two parts of the optical system 14, namely the primary optical element 140 and the secondary optical element 141.

Dans un mode de réalisation non limitatif, le système optique 14 comprend une pluralité de ponts de liaison 142. Dans l'exemple non limitatif illustré sur la figure 4, il comprend 7 ponts de liaison 142.In a non-limiting embodiment, the optical system 14 comprises a plurality of link bridges 142. In the non-limiting example illustrated in the figure 4 , it includes 7 connecting bridges 142.

Dans un mode de réalisation non limitatif illustré sur les figures 5a, 6a, 6b, 7, ledit au moins un pont de liaison 142 est plein. Il ne comprend aucune ouverture, comme dans le cas de la figure 5b, ce qui lui permet d'être plus robuste et de refroidir uniformément. Le pont de liaison 142 sert de point d'injection pour injecter la matière polymère synthétique.In a non-limiting embodiment illustrated in the figure 5a , 6a , 6b , 7 , said at least one connecting bridge 142 is full. It does not include any openings, as in the case of the figure 5b , which allows it to be more robust and cool evenly. The connecting bridge 142 serves as an injection point to inject the synthetic polymeric material.

On notera que le système optique 14 comprend d'autres ponts de liaison 144 illustrés sur la figure 4 présentant une ouverture 148 illustrée sur la figure 5b. Ces autres ponts de liaison 144 n'ont pas besoin d'avoir de motifs optiques 142a car ils permettent de réfléchir les rayons lumineux R provenant des sources lumineuses 13 en direction de la face de sortie 141b qui prolonge lesdits ponts de liaison 144 de sorte qu'il n'y ait pas de zones d'ombre à cet endroit.It will be noted that the optical system 14 includes other connecting bridges 144 illustrated in the figure 4 having an opening 148 illustrated on the figure 5b . These other connecting bridges 144 do not need to have optical patterns 142a because they make it possible to reflect the light rays R coming from the light sources 13 in the direction of the exit face 141b which extends said connecting bridges 144 so that there are no gray areas here.

Tel qu'illustré sur les figures 5a et 7, le pont de liaison 142 comprend au moins une structure optique 142a. Tel qu'illustré sur la figure 5a, la structure optique 142a comprend une face d'entrée 142b sensiblement perpendiculaire à une partie R1 des rayons lumineux R traversant ledit élément optique primaire 140, en particulier traversant la bonnette 143, de sorte qu'ils se propagent avec un minimum de réfraction au travers dudit au moins un pont de liaison 142 jusqu'à ladite face de sortie 141b.As shown on the figure 5a and 7 , the connecting bridge 142 comprises at least one optical structure 142a. As shown on the figure 5a , the optical structure 142a comprises an input face 142b substantially perpendicular to a part R1 of the light rays R passing through said primary optical element 140, in particular passing through the windshield 143, so that they propagate with a minimum of refraction through said at least one connecting bridge 142 to said exit face 141b.

Dans un mode de réalisation non limitatif, la face d'entrée 142b est perpendiculaire aux rayons lumineux R11 joignant la source lumineuse 13 au coin du pont de liaison 142 avec la face supérieure des échelons de Fresnel 141c. Par souci de simplification, un seul rayon lumineux R11 a été illustré. Ces rayons lumineux R11 ne sont pas déviés par réfraction. Les autres rayons lumineux de la partie R1 sont très peu déviés par réfraction de sorte qu'il y a très peu de perte de lumière sur la face de sortie 141c.In a non-limiting embodiment, the input face 142b is perpendicular to the light rays R11 joining the light source 13 at the corner of the connecting bridge 142 with the upper face of the Fresnel steps 141c. For the sake of simplification, a single light ray R11 has been illustrated. These light rays R11 are not deflected by refraction. Others light rays from part R1 are deflected very little by refraction so that there is very little loss of light on the exit face 141c.

Dans un mode de réalisation non limitatif, la structure optique 142a est en saillie dudit au moins un pont de liaison 142. Cela permet, tout en conservant la masse donc la résistance dudit pont de liaison 142, de lui ajouter une fonction de capture d'une partie R1 des rayons lumineux R pour les diriger sans réfraction vers une face de sortie 141b.In a non-limiting embodiment, the optical structure 142a projects from said at least one connecting bridge 142. This makes it possible, while retaining the mass and therefore the resistance of said connecting bridge 142, to add to it a a part R1 of the light rays R to direct them without refraction towards an exit face 141b.

Dans un mode de réalisation non limitatif, la forme ajoutée en saillie de la structure optique 142a forme en ailette à trois côtés. Un de ces cotés est attaché au pont de liaison 142. Un autre coté est la face d'entrée 142b telle qu'une partie R1 des rayons lumineux R arrive dessus sensiblement perpendiculairement. Cela permet à la partie R1 des rayons lumineux R de ne pas être déviée par réfraction lorsqu'ils entrent dans la matière du pont de liaison 142. Le dernier côté est configuré pour être parallèle à la partie R1 des rayons lumineux R. Cela permet que les rayons lumineux R ne heurtent pas cette face et donc ne modifient pas leur trajectoire dans le pont de liaison 142.In one non-limiting embodiment, the added projecting shape of the optical structure 142a forms a three-sided fin. One of these sides is attached to the connecting bridge 142. Another side is the input face 142b such that a part R1 of the light rays R arrives on it substantially perpendicularly. This allows the R1 portion of the R light rays not to be deflected by refraction as they enter the bonding bridge material 142. The last side is configured to be parallel to the R1 portion of the R light rays. the light rays R do not strike this face and therefore do not modify their trajectory in the connecting bridge 142.

La structure optique 142a est réalisé dans la même matière que le pont de liaison 142 pour que les rayons lumineux R1 que les traversent ne soient pas globalement déviés par réfraction. Ainsi, seule une petite fraction des rayons lumineux R1 sera déviée.The optical structure 142a is made of the same material as the connecting bridge 142 so that the light rays R1 that pass through them are not globally deflected by refraction. Thus, only a small fraction of the light rays R1 will be deflected.

Ainsi, la partie R1 des rayons lumineux R provenant de la source lumineuse 13 et ayant traversés l'élément optique primaire 140 se propage sensiblement en ligne droite avec un minimum de réfraction au travers dudit pont de liaison 142 jusqu'à la face de sortie 141b de l'élément optique secondaire 141.Thus, the part R1 of the light rays R coming from the light source 13 and having passed through the primary optical element 140 propagates substantially in a straight line with a minimum of refraction through said connecting bridge 142 to the exit face 141b of the secondary optical element 141.

Dans un mode de réalisation non limitatif illustré sur les figures 6a, 6b, ladite au moins une structure optique 142a est de même épaisseur e que ledit au moins un pont de liaison 142. Cela permet de récupérer tous les rayons lumineux R se propageant dans le pont de liaison 142 et d'empêcher leur déviation par réfraction de sorte qu'il n'y ait plus de zones d'ombre observées au niveau de la glace de sortie 11, dues à l'absence de rayons lumineux R au niveau du pont de liaison 142 sur la face de sortie 141b de l'élément optique secondaire 141. Les rayons lumineux R sortent bien par la face de sortie 141b qui prolonge le pont de liaison 142.In a non-limiting embodiment illustrated in the Figures 6a, 6b , said at least one optical structure 142a is of the same thickness e as said at least one connecting bridge 142. This makes it possible to recover all the light rays R propagating in the connecting bridge 142 and to prevent their deflection by refraction so that there are no more gray areas observed at the exit glass 11, due to the absence of light rays R at the level of the connecting bridge 142 on the exit face 141b of the secondary optical element 141. exit 141b which extends connecting bridge 142.

Dans un mode de réalisation non limitatif illustré sur la figure 4, lorsque le dispositif lumineux 1 comprend une pluralité de sources lumineuses 13, un pont de liaison 142 est entouré par deux sources lumineuses 13. Dans le cas d'une pluralité de ponts de liaison 142, chaque pont de liaison 142 est entouré par deux sources lumineuses 13.In a non-limiting embodiment illustrated in the figure 4 , when the light device 1 comprises a plurality of light sources 13, a connecting bridge 142 is surrounded by two light sources 13. In the case of a plurality of connecting bridges 142, each connecting bridge 142 is surrounded by two light sources bright 13.

Dans un mode de réalisation non limitatif, ledit au moins un pont de liaison 142 comprend deux motifs optiques 142a dont :

  • une première structure optique 142a avec une face d'entrée 142b perpendiculaire à une partie R1 des rayons lumineux R émis par l'une des deux sources lumineuse 12 entourant ledit pont de liaison 142 ; et
  • une deuxième structure optique 142a avec une face d'entrée 142b perpendiculaire à une partie R1 des rayons lumineux R émis par l'autre des deux sources lumineuses 13.
In a non-limiting embodiment, said at least one connecting bridge 142 comprises two optical patterns 142a including:
  • a first optical structure 142a with an input face 142b perpendicular to a part R1 of the light rays R emitted by one of the two light sources 12 surrounding said connecting bridge 142; and
  • a second optical structure 142a with an input face 142b perpendicular to a part R1 of the light rays R emitted by the other of the two light sources 13.

Ainsi, sur la face de sortie 141b qui prolonge un pont de liaison 142, il n'y a plus de zones d'ombres dues à la réfraction des rayons lumineux R provenant des deux sources lumineuses 13 réparties de chaque côté du pont de liaison 142.Thus, on the exit face 141b which extends a connecting bridge 142, there are no longer any shadow zones due to the refraction of the light rays R coming from the two light sources 13 distributed on each side of the connecting bridge 142 .

Dans un mode de réalisation non limitatif illustré sur les figures 5a, 6a, 6b, 7, la face de sortie 141b comprend des prismes 143 au niveau du pont de liaison 142 de sorte à redresser selon l'axe d'émission optique X les rayons lumineux R1 provenant de l'élément optique secondaire 141. Comme on peut le voir sur la figure 7, les rayons lumineux R1 qui ont traversé le pont de liaison 142 arrivent sur la face de sortie 141b et sont redressés par les prismes 143 et orientés parallèlement à l'axe d'émission optique X.In a non-limiting embodiment illustrated in the figure 5a , 6a , 6b , 7 , the output face 141b comprises prisms 143 at the level of the connecting bridge 142 so as to rectify along the optical emission axis X the light rays R1 originating from the secondary optical element 141. As can be seen in the figure 7 , the light rays R1 which have passed through the connecting bridge 142 arrive at the exit face 141b and are straightened by the prisms 143 and oriented parallel to the optical emission axis X.

Cela permet de pouvoir orienter vers la sortie la partie R1 des rayons lumineux R qui étaient entrés dans le pont de liaison 142 mais qui n'avaient pas l'orientation de l'axe d'émission optique X et ainsi d'éviter une zone de luminosité moindre à cet emplacement.This makes it possible to be able to direct towards the exit the part R1 of the light rays R which had entered the connecting bridge 142 but which had not not the orientation of the optical emission axis X and thus to avoid a zone of lower luminosity at this location.

Lesdits prismes 143 sont situés sur la face de sortie 141b, du côté opposé à celui où le pont de liaison 142 est jointif de la face d'entrée 141a. Dans un mode de réalisation non limitatif illustré sur la figure 6a, lesdits prismes 143 ont une même épaisseur e que ledit au moins un pont de liaison 142. Cela permet de récupérer l'ensemble des rayons lumineux R1 provenant du pont de liaison 142.Said prisms 143 are located on the exit face 141b, on the side opposite to that where the connecting bridge 142 is contiguous with the entrance face 141a. In a non-limiting embodiment illustrated in the figure 6a , said prisms 143 have the same thickness e as said at least one connecting bridge 142. This makes it possible to recover all of the light rays R1 originating from connecting bridge 142.

Les prismes 143 sont orientés de manière à réfracter les rayons lumineux R1 provenant du pont de liaison 142 suivant un axe de déplacement du véhicule automobile 2, qui est parallèle à l'axe d'émission optique X. A cet effet, les prismes 143 s'étendent perpendiculairement à la direction principale Y. On notera que les rayons R11 vus précédemment sont malheureusement perdus.The prisms 143 are oriented so as to refract the light rays R1 coming from the connecting bridge 142 along an axis of movement of the motor vehicle 2, which is parallel to the axis of optical emission X. For this purpose, the prisms 143 s 'extend perpendicular to the main direction Y. It will be noted that the rays R11 seen previously are unfortunately lost.

Dans un mode de réalisation non limitatif illustré sur la figure 5a, la face de sortie 141b comprend des prismes 143 répartis en deux ensembles 143a, 143b dont l'un 143a est configuré pour réorienter les rayons lumineux R1 provenant de la première structure optique 142a et l'autre 143b est configuré pour réorienter les rayons lumineux R1 provenant de la deuxième structure optique 142a. Ainsi, sur les figures 5a, 6a et 7, le groupe de droite 143b réoriente les rayons lumineux R1 provenant de la structure optique 142a de gauche, et le groupe de gauche 143a réoriente les rayons lumineux R1 provenant de la structure optique 142a de droite.In a non-limiting embodiment illustrated in the figure 5a , the output face 141b comprises prisms 143 divided into two sets 143a, 143b, one of which 143a is configured to redirect the light rays R1 coming from the first optical structure 142a and the other 143b is configured to redirect the light rays R1 coming from the second optical structure 142a. Thus, on the figure 5a , 6a and 7 , the right group 143b redirects the light rays R1 coming from the optical structure 142a on the left, and the left group 143a redirects the light rays R1 coming from the optical structure 142a on the right.

Bien entendu, la description de l'invention n'est pas limitée aux modes de réalisation décrits ci-dessus.Of course, the description of the invention is not limited to the embodiments described above.

Ainsi, dans un autre mode de réalisation non limitatif, ledit dispositif lumineux 1 est un dispositif d'éclairage intérieur comportant un boîtier fermé par une glace transparente ou translucide.Thus, in another non-limiting embodiment, said light device 1 is an interior lighting device comprising a case closed by transparent or translucent glass.

Ainsi, l'invention décrite présente notamment les avantages suivants :

  • elle permet au dispositif lumineux d'avoir une bonne homogénéité dans la répartition de la lumière sur la face de sortie 141b de l'élément optique secondaire 141 ;
  • elle permet à un observateur se trouvant sensiblement dans l'axe d'émission optique X de voir le faisceau lumineux sans zones d'ombres.
Thus, the invention described has in particular the following advantages:
  • it allows the light device to have good homogeneity in the distribution of light on the exit face 141b of the secondary optical element 141;
  • it allows an observer located substantially in the optical emission axis X to see the light beam without shadow zones.

Claims (11)

  1. A luminous device (1) for a motor vehicle (2), said luminous device (1) comprising:
    - a housing (10);
    - a support (12) comprising at least one light source (13) configured to emit light rays (R);
    - an optical system (14) configured to form a light beam (F) along an optical emission axis (X) from said light rays (R), and comprising:
    - a primary optical element (140) disposed partially facing said at least one light source (13);
    - a secondary optical element (141) disposed opposite said primary optical element (140), connected with said primary optical element (140) via at least one connecting bridge (142) and comprising an input face (141a) with Fresnel steps (141c) and an output face (141b);
    characterized in that said at least one connecting bridge (142) comprises at least one optical pattern (142a) with an input face (142b) substantially perpendicular to a portion (R1) of the light rays (R) passing through said primary optical element (140) and in that said output face (141 b) of said secondary optical element (141) comprises prisms (143) at said at least one connecting bridge (142) so as to rectify along said optical emission axis (X) the light rays (R1) coming from said secondary optical element (141) after having passed through the connecting bridge (142).
  2. The luminous device (1) according to claim 1, wherein said at least one optical pattern (142a) protrudes from said at least one connecting bridge (142).
  3. The luminous device (1) of claim 1 or claim 2, wherein said at least one optical pattern (142a) forms a fin.
  4. The luminous device (1) according to any one of the preceding claims, wherein said at least one optical pattern (142a) is of the same thickness (e) as said at least one connecting bridge (142).
  5. The luminous device (1) according to any one of the preceding claims, wherein said at least one connecting bridge (142) is solid.
  6. The luminous device (1) according to any one of the preceding claims, wherein the prisms (143) are oriented so as to refract the light rays (R1) coming from said at least one connecting bridge (142) along an axis of movement of the motor vehicle (2).
  7. The luminous device (1) according to any one of the preceding claims, wherein said luminous device (1) comprises a plurality of light sources (13) and a plurality of connecting bridges (142), one connecting bridge (142) being surrounded by two light sources (13).
  8. The luminous device (1) according to the preceding claim, wherein each connecting bridge (142) comprises two optical patterns (142a) of which:
    - a first optical pattern (142a) with an input face (142b) perpendicular to a portion (R1) of the light rays (R) emitted by one of the two light sources (12) surrounding said connecting bridge (142); and
    - a second optical pattern (142a) with an input face (142b) perpendicular to a portion (R1) of the light rays (R) emitted by the other of the two light sources (13).
  9. The luminous device (1) according to the preceding claim, wherein the prisms (143) are divided into two sets (143a, 143b), one (143a) of which is configured to redirect the light rays (R1) coming from the first optical pattern (142a) and the other (143b) is configured to redirect the light rays (R1) coming from the second optical pattern (142a).
  10. The luminous device (1) according to any one of the preceding claims, wherein the optical system (14) is made of synthetic polymeric material.
  11. The luminous device (1) according to any one of the preceding claims, wherein said luminous device (1) is a high mounted stop light.
EP19020459.4A 2018-08-03 2019-08-02 Light device for a motor vehicle Active EP3604905B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1857303A FR3084727B1 (en) 2018-08-03 2018-08-03 LIGHTING DEVICE FOR MOTOR VEHICLE

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EP3604905A1 EP3604905A1 (en) 2020-02-05
EP3604905B1 true EP3604905B1 (en) 2022-07-20

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Publication number Priority date Publication date Assignee Title
FR3141231A1 (en) * 2022-10-25 2024-04-26 Valeo Vision Optical module for a light signaling device
FR3141230A1 (en) * 2022-10-25 2024-04-26 Valeo Vision Optical device for a light signaling device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2776595B1 (en) * 1998-03-31 2000-06-16 Valeo Vision SIGNAL LIGHT COMPRISING MULTIPLE LIGHT SOURCES
FR2918439A1 (en) * 2007-07-02 2009-01-09 Valeo Vision Sa LUMINOUS SIGNALING DEVICE FOR MOTOR VEHICLE
FR2952163B1 (en) * 2009-11-02 2013-08-23 Valeo Vision LIGHTING OR SIGNALING DEVICE FOR A MOTOR VEHICLE COMPRISING A LIGHT GUIDE
JP5626754B2 (en) * 2010-01-10 2014-11-19 シチズン電子株式会社 Optical unit
JP2013026008A (en) * 2011-07-20 2013-02-04 Koito Mfg Co Ltd Vehicular lamp
EP2587120B1 (en) * 2011-10-27 2016-04-13 odelo GmbH Light guide and automotive vehicle equipped with such a light guide
DE102013212352A1 (en) * 2013-06-26 2014-12-31 Automotive Lighting Reutlingen Gmbh Automotive lighting device with a Einkoppeloptik and a transport and forming optics
DE202014101954U1 (en) * 2014-04-25 2015-07-28 Zumtobel Lighting Gmbh Optical element for an LED, LED arrangement with such an optical element, as well as luminaire with such an LED arrangement
FR3039630A1 (en) * 2015-07-28 2017-02-03 Valeo Vision LIGHTING SYSTEM FOR MOTOR VEHICLE PROJECTOR

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FR3084727A1 (en) 2020-02-07
CN110792988A (en) 2020-02-14
EP3604905A1 (en) 2020-02-05
CN110792988B (en) 2023-05-12
ES2926352T3 (en) 2022-10-25

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