EP2900520A1 - Lighting device, in particular for a motor vehicle - Google Patents

Lighting device, in particular for a motor vehicle

Info

Publication number
EP2900520A1
EP2900520A1 EP13765728.4A EP13765728A EP2900520A1 EP 2900520 A1 EP2900520 A1 EP 2900520A1 EP 13765728 A EP13765728 A EP 13765728A EP 2900520 A1 EP2900520 A1 EP 2900520A1
Authority
EP
European Patent Office
Prior art keywords
guide
lighting
light
coupling
guides
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.)
Pending
Application number
EP13765728.4A
Other languages
German (de)
French (fr)
Inventor
Pierre-Louis Tassy
Boubacar Sagna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP2900520A1 publication Critical patent/EP2900520A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2821—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/60—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects
    • B60Q3/62—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides
    • B60Q3/64—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides for a single lighting device
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces

Definitions

  • Lighting device especially for a motor vehicle.
  • the present invention relates to a lighting device, especially for a motor vehicle. It is particularly intended to illuminate the interior of the cabin.
  • patent application DE102006035508A discloses a lighting guide arranged on the back of the front seat of a vehicle.
  • the linear light guide is coupled to a light emitting diode, and can be used by the occupant sitting at the rear of the car.
  • the object of the invention is to provide a simple device using only one lighting guide capable of illuminating independently different parts of the cabin.
  • the invention proposes a lighting device, especially for a passenger compartment of a motor vehicle, comprising a lighting guide capable of illuminating all or part of the passenger compartment, and two coupling guides associated with the lighting guide, each coupling guide being configured to bring a light beam from a light source into said illumination guide, said device being configured so that zones of the illumination guide are ignited independently from each other by each of said light beams .
  • the output ends of the coupling guides penetrate tangentially into the lighting guide, the rays issuing from said coupling guides having an angle of incidence allowing reflection of the light in said lighting guides, and output ends are arranged along the illumination guide, so that the propagation directions of each beam are opposite each other at the output of the coupling guide.
  • This provides a lighting device that, with a single lighting guide, provides areas that can light independently of each other. It thus allows to illuminate different parts of the passenger compartment of a car while having a small footprint.
  • This device also provides an original aesthetic dimension, thanks to the uniqueness of the lighting guide, some areas can be lit while others remain off.
  • the lighting guide is a linear guide
  • the coupling guides are linear channels provided with an input end and an output end of the light beam
  • the coupling guides have a section whose value increases from the input end to the output end
  • the coupling guides have, at their outlet end, a surface section smaller than or equal to that of the lighting guide,
  • the coupling guides and the lighting guide are formed of a single material, the coupling guides are arranged in a plane substantially perpendicular to the direction of propagation of the light outside the device,
  • said lighting guide comprises patterns of reflection of light
  • said light reflection patterns make it possible to reflect the light in different directions according to the zone of the lighting guide, in order to illuminate the passenger compartment in different directions,
  • said reflection patterns are prisms
  • said prisms have different angles of reflection according to the zone of the lighting guide, in order to illuminate the passenger compartment in different directions.
  • FIG. 1 schematically illustrating a view from above of a lighting device according to the invention
  • FIG. 2 schematically illustrating a view from above of a portion of the lighting device according to the invention, represented with the path of the light beams,
  • FIG. 3 schematically illustrating a perspective view of a part of the lighting device according to the invention
  • FIG. 4 schematically illustrating a perspective view of a detail of the lighting device according to the invention, shown with the path of the light beams.
  • the invention relates to a lighting device 1 comprising a lighting guide 2 capable of illuminating all or part of the passenger compartment.
  • Said lighting guide 2 is monobloc and / or formed of a single material. Thus, the light propagates naturally by total reflection within said lighting guide 2, without obstacles or separations between parts of said guide, which could affect its circulation.
  • the lighting guide 2 is a linear guide, to keep a limited volume, as well as for aesthetic reasons.
  • Said lighting guide 2 is advantageously open. By this is meant that said lighting guide 2 does not loop not on himself. It is not in the form of a ring. In other words, said lighting guide 2 has free longitudinal ends.
  • Said device further comprises two coupling guides 6, 7 associated with the lighting guide 2, each coupling guide 6, 7 being configured to bring a light beam 8, 9 coming from a light source 3 into said light guide.
  • the light sources 3 are one or more light-emitting diodes, arranged for example on a PCB-type support, in particular an insulated metal substrate-type support.
  • the coupling guides 6, 7 are linear channels provided with an input end 12 and an output end 13 of the light beam. In Figure 2, only the ends 12, 13 of a single coupling guide 6 are shown.
  • the coupling guides 6, 7 serve to guide the light beams 8, 9 of the diode to the inside of the lighting guide 2. These channels guide the beams while keeping the intensity of the beam as high as possible. avoid losses.
  • the lighting guide 2 provides effective illumination with a light beam even if it comes from a single diode.
  • the outlet ends 13 of the coupling guides 6, 7 penetrate tangentially into the lighting guide 2, the rays issuing from said coupling guide having an angle of incidence allowing reflection of the light in the lighting guide. 2.
  • the output ends 13 of the coupling guides 6, 7 merge with the lighting guide 2.
  • the coupling guides 6, 7 may also have a curvature at their outlet end 13, to bring said beams progressively in a direction corresponding to the longitudinal axis of the lighting guide 2.
  • the angle of incidence of the outgoing light rays the end 13 of the coupling guide should not be too small, because this would cause the passage of the beam through the light guide 2, without reflection on the wall allows to direct it inside the guide lighting 2.
  • the output ends 13 are arranged along the lighting guide 2, so that the propagation directions of each beam 8, 9 are opposite each other at the output of the coupling guide 6, 7.
  • the two beams 8, 9 propagate in opposite areas 4, 5 of the lighting guide 2. Therefore, when only one of said beams 8, 9 propagates in said lighting guide 2, only one of said Zones 4, 5 is on, the other remains off.
  • the configuration of the device 1 avoids as much as possible the transfer of light rays from one zone 4 to the other.
  • a first beam 8 is brought by the first coupling guide 7, and a second beam 9 is brought by the second coupling guide 6.
  • the angle of incidence and the curvature of the guides The shape of the coupling guides 6, 7 and their arrangement with respect to one another gives the beams 8, 9 opposite directions of propagation.
  • the two zones 4, 5 light up independently of one another.
  • the outlet ends 13 are disposed substantially in the middle of the lighting guide 2, so that the two illuminating areas 4, 5 have identical dimensions. In the case where it is desired to obtain illuminating zones 4, 5 of unequal dimensions, it suffices to place the exit ends 13 along the illumination guide 2, at a point dividing the lighting guide into zones with dimensions required.
  • the coupling guides 6, 7 have sections 10, 1 1 whose value increases from the inlet end 12 to the outlet end 13.
  • sections 10, 1 1 d a coupling guide 6 are shown for illustrative purposes.
  • the input end 12 has a smaller cross sectional area than that 1 1 of the output end 13. This feature avoids a loss of intensity of the light beam, in particular due to the curvature of the channel of the light guides 6 , 7.
  • the coupling guides 6, 7 have surface sections 1 1 less than or equal to the area of the section of the lighting guide 2, in particular at the output end 13 of the light beam. Thus, it prevents a loss of intensity of the light beam during the passage of the junction between the light guides 6, 7 and the lighting guide 2.
  • the coupling guides 6, 7 and the lighting guide 2 are formed of a single material, to promote the propagation of the beams 8, 9 of the coupling guides 6, 7 in the lighting guide 2. In FIG. Indeed, interfaces would cause phenomena unfavorable to the propagation or transfer of light beams 8, 9.
  • said lighting guide 2 comprises light reflection patterns. Their function is to modify the orientation of the light rays inside the lighting guide 2, so that they strike an exit face 17 of the guide lighting 2 with an angle of incidence allowing them to exit outside the guide. As shown in FIGS. 3 and 4, these are reflection prisms 14 placed on the upper face 15 of the illumination guide 2. The prisms 14 return the light rays 16 which meet them through the guide of FIG. lighting 2, with an angle of incidence sufficiently low that they exit the lighting guide 2 by the exit face 17.
  • said prisms 14 have different angles of reflection according to the zones 4, 5 of the lighting guide 2.
  • the angles of reflection are defined between the main direction of the beam in the lighting guide and the main direction of the beam Release.
  • the angles of reflection define an orientation of the illumination beam, and therefore of the portion of the passenger compartment that area 4, 5 of the lighting guide 2 will illuminate.
  • the device 1 mainly illuminates a portion of the passenger compartment disposed below the device 1.
  • Other angle values make it possible to orient the main direction of the output beam of each zone.
  • the zones 4, 5 have prisms 14 whose angle values are different from one zone to another, for example opposite.
  • angles of the prisms 14 are identical within the same zone in order to keep a uniform light beam.
  • the coupling guides 6, 7 are arranged in a plane substantially perpendicular to the direction of propagation of the light out of the device 1.
  • the device 1 is easier to integrate in a ceiling knowing that it must illuminate down.
  • the number of coupling guides is not limited to two. Several coupling guides can be envisaged for each zone of the lighting guide. The number of zones of the lighting guide is not limited to two. It is possible to envisage a lighting guide composed of several linear portions, for example in the form of a cross.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

The present invention concerns a lighting device (1), in particular for a motor vehicle passenger compartment, comprising a light guide (2) designed to illuminate all or part of the passenger compartment, and two coupling guides (6, 7) combined with the light guide (2), each coupling guide (6, 7) being configured to deliver a light beam from a light source (3) to said light guide (2), said device (1) being designed such that areas (4 and 5) of the light guide (2) are illuminated separately of each by each of said light beams. According to the invention, the outlet ends (13) of the coupling guides (6, 7) penetrate tangentially into the light guide (2), the rays exiting said coupling guides having an incident angle allowing light to be reflected into said light guides (2), and the outlet ends (13) are arranged alongside the light guide (2), such that the directions of propagation of each light beam (8 and 9) are opposite each other at the outlet of the coupling guide (6, 7).

Description

Dispositif d'éclairage, notamment pour véhicule automobile.  Lighting device, especially for a motor vehicle.
La présente invention concerne un dispositif d'éclairage, notamment pour véhicule automobile. Elle est en particulier destinée à éclairer l'intérieur de l'habitacle. The present invention relates to a lighting device, especially for a motor vehicle. It is particularly intended to illuminate the interior of the cabin.
Dans ce domaine, il a déjà été proposé, en remplacement des lampes à incandescence classiques, d'utiliser des dispositifs d'éclairage munis d'une source lumineuse, en général une diode électroluminescente, et un guide d'éclairage à travers lequel se propage un faisceau lumineux issu de la source. La lumière est réfléchie vers l'extérieur par des moyens de réflexions disposés à la surface du guide. Ce dispositif permet d'éclairer l'intérieur de l'habitacle d'une voiture, tout en montrant un design esthétique particulièrement apprécié pour son caractère minimaliste.  In this field, it has already been proposed, in replacement of conventional incandescent lamps, to use lighting devices provided with a light source, generally a light-emitting diode, and a lighting guide through which propagates a light beam from the source. The light is reflected to the outside by means of reflections arranged on the surface of the guide. This device allows to illuminate the interior of the cabin of a car, while showing an aesthetic design particularly appreciated for its minimalist character.
Dans un habitacle, on peut avoir besoin de plusieurs éclairages pour des parties différentes. Notamment, certains passagers peuvent avoir besoin de lumière, par exemple pour lire, alors que d'autres souhaitent en être dispensé.  In a cabin, you may need several lights for different parts. In particular, some passengers may need light, for example to read, while others want to be exempted.
Il est connu en ce sens d'utiliser des éclairages individuels orientés pour éclairer chaque place, sans occasionner de gêne pour les autres occupants. Ils servent notamment de liseuse. On connaît par exemple dans la demande de brevet DE102006035508A, un guide d'éclairage agencé au dos du siège avant d'un véhicule. Le guide d'éclairage linéaire est couplé à une diode électroluminescente, et peut être utilisé par l'occupant assis à l'arrière de la voiture.  It is known in this sense to use individual lighting oriented to illuminate each place, without causing discomfort to other occupants. They serve as a reading light. For example, patent application DE102006035508A discloses a lighting guide arranged on the back of the front seat of a vehicle. The linear light guide is coupled to a light emitting diode, and can be used by the occupant sitting at the rear of the car.
Ces dispositifs nécessitent cependant un emplacement et un raccordement individuel pour chacun d'eux, en général un par place assise. Cela engendre des coûts non négligeables et une complexité dans l'agencement et l'organisation lors de la fabrication.  These devices, however, require a location and an individual connection for each of them, usually one per seat. This generates significant costs and complexity in the layout and organization during manufacture.
Dans le domaine des éclairages classiques, il existe aussi des éclairages centralisés, disposés au plafond de l'habitacle, et qui comprennent plusieurs dispositifs regroupés en un seul ensemble. Ils permettent de simplifier le câblage électrique, mais ils ne règlent pas le problème de la complexité du raccordement.  In the field of conventional lighting, there are also centralized lighting, arranged on the ceiling of the cabin, and which include several devices grouped into a single set. They simplify the electrical wiring, but they do not solve the problem of the complexity of the connection.
En outre, cette multiplicité de dispositifs assemblés, nuit au caractère esthétique apporté par les guides d'éclairages quand l'on souhaite disposer d'un dispositif d'éclairage sobre, en particulier en mode éteint. Ainsi, le but de l'invention est de fournir un dispositif simple n'utilisant qu'un seul guide d'éclairage, capable d'éclairer indépendamment des parties différentes de l'habitacle. In addition, this multiplicity of devices assembled, harms the aesthetic nature provided by the lighting guides when one wishes to have a sober lighting device, especially in off mode. Thus, the object of the invention is to provide a simple device using only one lighting guide capable of illuminating independently different parts of the cabin.
Pour cela, l'invention propose un dispositif d'éclairage, notamment pour habitacle de véhicule automobile, comprenant un guide d'éclairage apte à éclairer tout ou partie de l'habitacle, et deux guides de couplage associés au guide d'éclairage, chaque guide de couplage étant configuré pour amener un faisceau de lumière issu d'une source lumineuse dans ledit guide d'éclairage, ledit dispositif étant configuré pour que des zones du guide d'éclairage soient allumées indépendamment les unes des autres par chacun desdits faisceaux de lumière.  For this, the invention proposes a lighting device, especially for a passenger compartment of a motor vehicle, comprising a lighting guide capable of illuminating all or part of the passenger compartment, and two coupling guides associated with the lighting guide, each coupling guide being configured to bring a light beam from a light source into said illumination guide, said device being configured so that zones of the illumination guide are ignited independently from each other by each of said light beams .
Selon l'invention, les extrémités de sortie des guides de couplage pénètrent tangentiellement dans le guide d'éclairage, les rayons sortant desdits guides de couplage ayant un angle d'incidence permettant la réflexion de la lumière dans lesdits guides d'éclairage, et les extrémités de sortie sont disposées le long du guide d'éclairage, de sorte que les sens de propagation de chaque faisceau sont opposés l'un à l'autre à la sortie du guide de couplage.  According to the invention, the output ends of the coupling guides penetrate tangentially into the lighting guide, the rays issuing from said coupling guides having an angle of incidence allowing reflection of the light in said lighting guides, and output ends are arranged along the illumination guide, so that the propagation directions of each beam are opposite each other at the output of the coupling guide.
On dispose ainsi d'un dispositif d'éclairage qui, avec un guide d'éclairage unique, offre des zones qui peuvent s'allumer indépendamment les unes des autres. Il permet de la sorte d'éclairer des parties différentes de l'habitacle d'une voiture tout en présentant un encombrement réduit.  This provides a lighting device that, with a single lighting guide, provides areas that can light independently of each other. It thus allows to illuminate different parts of the passenger compartment of a car while having a small footprint.
Ce dispositif apporte en outre une dimension esthétique originale, grâce à l'unicité du guide d'éclairage dont certaines zones peuvent être allumées pendant que d'autres restent éteintes.  This device also provides an original aesthetic dimension, thanks to the uniqueness of the lighting guide, some areas can be lit while others remain off.
Selon différents modes de réalisation de l'invention, qui pourront être pris ensemble ou séparément :  According to various embodiments of the invention, which may be taken together or separately:
- le guide d'éclairage est un guide linéaire,  - the lighting guide is a linear guide,
- les guides de couplage sont des canaux linéaires munis d'une extrémité d'entrée et d'une extrémité de sortie du faisceau de lumière,  the coupling guides are linear channels provided with an input end and an output end of the light beam,
- les guides de couplage ont une section dont la valeur augmente de l'extrémité d'entrée à l'extrémité de sortie,  the coupling guides have a section whose value increases from the input end to the output end,
- les guides de couplage ont, à leur extrémité de sortie, une section de surface inférieure ou égale à celle du guide d'éclairage,  the coupling guides have, at their outlet end, a surface section smaller than or equal to that of the lighting guide,
- les guides de couplage et le guide d'éclairage sont formés d'une seule matière, - les guides de couplage sont disposés dans un plan sensiblement perpendiculaire à la direction de propagation de la lumière hors du dispositif, the coupling guides and the lighting guide are formed of a single material, the coupling guides are arranged in a plane substantially perpendicular to the direction of propagation of the light outside the device,
- ledit guide d'éclairage comprend des motifs de réflexion de la lumière, said lighting guide comprises patterns of reflection of light,
- lesdits motifs de réflexion de la lumière permettent de réfléchir la lumière dans des directions différentes selon la zone du guide d'éclairage, afin d'éclairer l'habitacle dans des directions différentes, said light reflection patterns make it possible to reflect the light in different directions according to the zone of the lighting guide, in order to illuminate the passenger compartment in different directions,
- lesdits motifs de réflexion sont des prismes,  said reflection patterns are prisms,
- lesdits prismes ont des angles de réflexion différents selon la zone du guide d'éclairage, afin d'éclairer l'habitacle dans des directions différentes.  said prisms have different angles of reflection according to the zone of the lighting guide, in order to illuminate the passenger compartment in different directions.
L'invention sera mieux comprise à la lumière de la description suivante qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter, accompagnée des dessins joints :  The invention will be better understood in the light of the following description which is given for information only and which is not intended to limit it, accompanied by the attached drawings:
- la figure 1 illustrant de façon schématique, une vue de dessus d'un dispositif d'éclairage selon l'invention,  FIG. 1 schematically illustrating a view from above of a lighting device according to the invention,
- la figure 2 illustrant de façon schématique, une vue de dessus d'une partie du dispositif d'éclairage selon l'invention, représenté avec le trajet des faisceaux lumineux,  FIG. 2 schematically illustrating a view from above of a portion of the lighting device according to the invention, represented with the path of the light beams,
- la figure 3 illustrant de façon schématique, une vue en perspective d'une partie du dispositif d'éclairage selon l'invention,  FIG. 3 schematically illustrating a perspective view of a part of the lighting device according to the invention,
- la figure 4 illustrant de façon schématique, une vue en perspective d'un détail du dispositif d'éclairage selon l'invention, représenté avec le trajet des faisceaux lumineux.  - Figure 4 schematically illustrating a perspective view of a detail of the lighting device according to the invention, shown with the path of the light beams.
Comme illustré aux figures 1 et 2, l'invention concerne un dispositif d'éclairage 1 comprenant un guide d'éclairage 2 apte à éclairer tout ou partie de l'habitacle.  As illustrated in Figures 1 and 2, the invention relates to a lighting device 1 comprising a lighting guide 2 capable of illuminating all or part of the passenger compartment.
Ledit guide d'éclairage 2 est monobloc et/ou formé d'une seule matière. Ainsi, la lumière se propage naturellement par réflexion totale à l'intérieur dudit guide d'éclairage 2, sans obstacles ou séparations entre des parties dudit guide, qui pourraient nuire à sa circulation.  Said lighting guide 2 is monobloc and / or formed of a single material. Thus, the light propagates naturally by total reflection within said lighting guide 2, without obstacles or separations between parts of said guide, which could affect its circulation.
Avantageusement, le guide d'éclairage 2 est un guide linéaire, pour garder un volume limité, ainsi que par souci esthétique. Ledit guide d'éclairage 2 est avantageusement ouvert. On entend par là que ledit guide d'éclairage 2 ne boucle pas sur lui-même. Il n'est donc pas en forme d'anneau. Encore autrement dit, ledit guide d'éclairage 2 présente des extrémités longitudinales libres. Advantageously, the lighting guide 2 is a linear guide, to keep a limited volume, as well as for aesthetic reasons. Said lighting guide 2 is advantageously open. By this is meant that said lighting guide 2 does not loop not on himself. It is not in the form of a ring. In other words, said lighting guide 2 has free longitudinal ends.
Ledit dispositif comprend en outre, deux guides de couplage 6, 7 associés au guide d'éclairage 2, chaque guide de couplage 6, 7 étant configuré pour amener un faisceau de lumière 8, 9 issu d'une source lumineuse 3 dans ledit guide d'éclairage 2. Ici, les sources lumineuses 3 sont une ou des diodes électroluminescentes, disposées par exemple sur un support de type PCB, en particulier un support de type substrat métallique isolé.  Said device further comprises two coupling guides 6, 7 associated with the lighting guide 2, each coupling guide 6, 7 being configured to bring a light beam 8, 9 coming from a light source 3 into said light guide. 2. Here, the light sources 3 are one or more light-emitting diodes, arranged for example on a PCB-type support, in particular an insulated metal substrate-type support.
Les guides de couplage 6, 7 sont des canaux linéaires munis d'une extrémité d'entrée 12 et d'une extrémité de sortie 13 du faisceau de lumière. Sur la figure 2, seules les extrémités 12, 13 d'un seul guide de couplage 6 sont représentées. Les guides de couplage 6, 7 ont pour fonction de guider les faisceaux lumineux 8, 9 de la diode jusqu'à l'intérieur du guide d'éclairage 2. Ces canaux guident les faisceaux en conservant au maximum l'intensité du faisceau, pour éviter les pertes. Ainsi, le guide d'éclairage 2 fournit un éclairage efficace avec un faisceau lumineux même s'il est issu d'une seule diode.  The coupling guides 6, 7 are linear channels provided with an input end 12 and an output end 13 of the light beam. In Figure 2, only the ends 12, 13 of a single coupling guide 6 are shown. The coupling guides 6, 7 serve to guide the light beams 8, 9 of the diode to the inside of the lighting guide 2. These channels guide the beams while keeping the intensity of the beam as high as possible. avoid losses. Thus, the lighting guide 2 provides effective illumination with a light beam even if it comes from a single diode.
De préférence, les extrémités de sortie 13 des guides de couplage 6, 7 pénètrent tangentiellement dans le guide d'éclairage 2, les rayons sortant dudit guide de couplage ayant un angle d'incidence permettant la réflexion de la lumière dans le guide d'éclairage 2. Les extrémités de sortie 13 des guides de couplage 6, 7 se confondent avec le guide d'éclairage 2.  Preferably, the outlet ends 13 of the coupling guides 6, 7 penetrate tangentially into the lighting guide 2, the rays issuing from said coupling guide having an angle of incidence allowing reflection of the light in the lighting guide. 2. The output ends 13 of the coupling guides 6, 7 merge with the lighting guide 2.
Les guides de couplage 6, 7 peuvent aussi présenter une courbure à leur extrémité de sortie 13, pour amener lesdits faisceaux progressivement dans une direction correspondant à l'axe longitudinal du guide d'éclairage 2. L'angle d'incidence des rayons lumineux sortant de l'extrémité 13 du guide de couplage ne doit pas être trop petit, car cela provoquerait le passage du faisceau à travers le guide d'éclairage 2, sans qu'une réflexion sur la paroi permette de le diriger à l'intérieur du guide d'éclairage 2.  The coupling guides 6, 7 may also have a curvature at their outlet end 13, to bring said beams progressively in a direction corresponding to the longitudinal axis of the lighting guide 2. The angle of incidence of the outgoing light rays the end 13 of the coupling guide should not be too small, because this would cause the passage of the beam through the light guide 2, without reflection on the wall allows to direct it inside the guide lighting 2.
En outre, les extrémités de sortie 13 sont disposées le long du guide d'éclairage 2, de sorte que les sens de propagation de chaque faisceau 8, 9 sont opposés l'un à l'autre à la sortie du guide de couplage 6, 7. Ainsi, les deux faisceaux 8, 9 se propagent dans des zones opposées 4, 5 du guide d'éclairage 2. Par conséquent, lorsque seul un desdits faisceaux 8, 9 se propage dans ledit guide d'éclairage 2, seule une desdites zones 4, 5 est allumée, l'autre demeurant éteinte. La configuration du dispositif 1 évite au maximum le transfert de rayons lumineux d'une zone 4, 5 à l'autre. In addition, the output ends 13 are arranged along the lighting guide 2, so that the propagation directions of each beam 8, 9 are opposite each other at the output of the coupling guide 6, 7. Thus, the two beams 8, 9 propagate in opposite areas 4, 5 of the lighting guide 2. Therefore, when only one of said beams 8, 9 propagates in said lighting guide 2, only one of said Zones 4, 5 is on, the other remains off. The configuration of the device 1 avoids as much as possible the transfer of light rays from one zone 4 to the other.
Comme nous pouvons le voir sur la figure 2, un premier faisceau 8 est amené par le premier guide de couplage 7, et un second faisceau 9 est amené par le deuxième guide de couplage 6. L'angle d'incidence et la courbure des guides de couplage favorisent la réflexion des faisceaux dans le guide d'éclairage 2. La forme des guides de couplage 6, 7 et leur disposition l'un par rapport à l'autre, donnent aux faisceaux 8, 9 des sens de propagation opposées. Ainsi, les deux zones 4, 5 s'éclairent indépendamment l'une de l'autre.  As we can see in FIG. 2, a first beam 8 is brought by the first coupling guide 7, and a second beam 9 is brought by the second coupling guide 6. The angle of incidence and the curvature of the guides The shape of the coupling guides 6, 7 and their arrangement with respect to one another gives the beams 8, 9 opposite directions of propagation. Thus, the two zones 4, 5 light up independently of one another.
De manière avantageuse, les extrémités de sortie 13 sont disposées sensiblement au milieu du guide d'éclairage 2, afin que les deux zones 4, 5 éclairantes aient des dimensions identiques. Dans le cas où l'on souhaite obtenir des zones 4, 5 éclairantes de dimensions inégales, il suffit de placer les extrémités de sortie 13 le long du guide d'éclairage 2, à un endroit divisant le guide d'éclairage en zones aux dimensions voulues.  Advantageously, the outlet ends 13 are disposed substantially in the middle of the lighting guide 2, so that the two illuminating areas 4, 5 have identical dimensions. In the case where it is desired to obtain illuminating zones 4, 5 of unequal dimensions, it suffices to place the exit ends 13 along the illumination guide 2, at a point dividing the lighting guide into zones with dimensions required.
De préférence, les guides de couplage 6, 7 ont des sections 10, 1 1 dont la valeur augmente de l'extrémité d'entrée 12 à l'extrémité de sortie 13. Sur la figure 2, seules les sections 10, 1 1 d'un guide de couplage 6 sont représentées, à titre illustratif. L'extrémité d'entrée 12 a une surface de section 10 plus petite que celle 1 1 de l'extrémité de sortie 13. Cette caractéristique évite une perte d'intensité du faisceau lumineux, notamment due à la courbure du canal des guides lumineux 6, 7.  Preferably, the coupling guides 6, 7 have sections 10, 1 1 whose value increases from the inlet end 12 to the outlet end 13. In FIG. 2, only the sections 10, 1 1 d a coupling guide 6 are shown for illustrative purposes. The input end 12 has a smaller cross sectional area than that 1 1 of the output end 13. This feature avoids a loss of intensity of the light beam, in particular due to the curvature of the channel of the light guides 6 , 7.
De manière remarquable, les guides de couplage 6, 7 ont des sections de surface 1 1 inférieure ou égale à la surface de la section du guide d'éclairage 2, notamment à l'extrémité de sortie 13 du faisceau de lumière. Ainsi, on prévient une perte d'intensité du faisceau lumineux lors du passage de la jonction entre les guides lumineux 6, 7 et le guide d'éclairage 2.  Remarkably, the coupling guides 6, 7 have surface sections 1 1 less than or equal to the area of the section of the lighting guide 2, in particular at the output end 13 of the light beam. Thus, it prevents a loss of intensity of the light beam during the passage of the junction between the light guides 6, 7 and the lighting guide 2.
En outre, les guides de couplage 6, 7 et le guide d'éclairage 2 sont formés d'une seule matière, pour favoriser la propagation des faisceaux 8, 9 des guides de couplage 6, 7 dans le guide d'éclairage 2. En effet, des d'interfaces provoqueraient des phénomènes défavorables à la propagation ou au transfert des faisceaux lumineux 8, 9.  In addition, the coupling guides 6, 7 and the lighting guide 2 are formed of a single material, to promote the propagation of the beams 8, 9 of the coupling guides 6, 7 in the lighting guide 2. In FIG. Indeed, interfaces would cause phenomena unfavorable to the propagation or transfer of light beams 8, 9.
De préférence, ledit guide d'éclairage 2 comprend des motifs de réflexion de la lumière. Ils ont pour fonction de modifier l'orientation des rayons lumineux à l'intérieur du guide d'éclairage 2, afin qu'ils frappent une face de sortie 17 du guide d'éclairage 2 avec un angle d'incidence leur permettant de sortir à l'extérieur du guide. Comme cela est représenté sur les figures 3 et 4, il s'agit de prismes 14 de réflexion placés sur la face supérieure 15 du guide d'éclairage 2. Les prismes 14 renvoient les rayons lumineux 16 qui les rencontrent à travers le guide d'éclairage 2, avec un angle d'incidence suffisamment faible pour qu'ils sortent du guide d'éclairage 2 par la face de sortie 17. Preferably, said lighting guide 2 comprises light reflection patterns. Their function is to modify the orientation of the light rays inside the lighting guide 2, so that they strike an exit face 17 of the guide lighting 2 with an angle of incidence allowing them to exit outside the guide. As shown in FIGS. 3 and 4, these are reflection prisms 14 placed on the upper face 15 of the illumination guide 2. The prisms 14 return the light rays 16 which meet them through the guide of FIG. lighting 2, with an angle of incidence sufficiently low that they exit the lighting guide 2 by the exit face 17.
De façon remarquable, lesdits prismes 14 ont des angles de réflexion différents selon les zones 4, 5 du guide d'éclairage 2. Les angles de réflexion sont définis entre la direction principale du faisceau dans le guide d'éclairage et la direction principale du faisceau de sortie.  Remarkably, said prisms 14 have different angles of reflection according to the zones 4, 5 of the lighting guide 2. The angles of reflection are defined between the main direction of the beam in the lighting guide and the main direction of the beam Release.
Les angles de réflexion définissent une orientation du faisceau d'éclairage, donc de la partie de l'habitacle que la zone 4, 5 du guide d'éclairage 2 va éclairer. Par exemple, avec un angle de réflexion proche de 90°, le dispositif 1 éclaire principalement une partie de l'habitacle disposée en dessous du dispositif 1 . D'autres valeurs d'angle permettent d'orienter la direction principale du faisceau de sortie de chaque zone.  The angles of reflection define an orientation of the illumination beam, and therefore of the portion of the passenger compartment that area 4, 5 of the lighting guide 2 will illuminate. For example, with a reflection angle close to 90 °, the device 1 mainly illuminates a portion of the passenger compartment disposed below the device 1. Other angle values make it possible to orient the main direction of the output beam of each zone.
Comme le dispositif 1 est prévu pour éclairer des parties différentes de l'habitacle, les zones 4, 5 ont des prismes 14 dont les valeurs d'angle sont différentes d'une zone à l'autre, par exemple opposée.  Since the device 1 is designed to illuminate different parts of the passenger compartment, the zones 4, 5 have prisms 14 whose angle values are different from one zone to another, for example opposite.
De préférence, les angles des prismes 14 sont identiques à l'intérieur d'une même zone afin de garder un faisceau lumineux uniforme.  Preferably, the angles of the prisms 14 are identical within the same zone in order to keep a uniform light beam.
Avantageusement, les guides de couplage 6, 7 sont disposés dans un plan sensiblement perpendiculaire à la direction de propagation de la lumière hors du dispositif 1 . Ainsi, le dispositif 1 est plus facile à intégrer dans un plafond sachant qu'il doit éclairer vers le bas.  Advantageously, the coupling guides 6, 7 are arranged in a plane substantially perpendicular to the direction of propagation of the light out of the device 1. Thus, the device 1 is easier to integrate in a ceiling knowing that it must illuminate down.
Par ailleurs, le nombre de guides de couplage n'est pas limité à deux. On peut envisager plusieurs guides de couplage pour chaque zone du guide d'éclairage. Le nombre de zones du guide d'éclairage n'est pas limité à deux. On peut envisager un guide d'éclairage composé de plusieurs portions linéaires, par exemple en forme de croix.  Moreover, the number of coupling guides is not limited to two. Several coupling guides can be envisaged for each zone of the lighting guide. The number of zones of the lighting guide is not limited to two. It is possible to envisage a lighting guide composed of several linear portions, for example in the form of a cross.

Claims

REVENDICATIONS
1 . Dispositif d'éclairage (1 ), notamment pour habitacle de véhicule automobile, comprenant un guide d'éclairage (2) apte à éclairer tout ou partie de l'habitacle, et deux guides de couplage (6, 7) associés au guide d'éclairage (2), chaque guide de couplage (6, 7) étant configuré pour amener un faisceau de lumière (8, 9) issu d'une source lumineuse (3) dans ledit guide d'éclairage (2), ledit dispositif (1 ) étant configuré pour que des zones (4, 5) du guide d'éclairage (2) soient allumées indépendamment les unes des autres par chacun desdits faisceaux de lumière (8, 9), 1. Lighting device (1), in particular for a passenger compartment of a motor vehicle, comprising a lighting guide (2) capable of illuminating all or part of the passenger compartment, and two coupling guides (6, 7) associated with the guide of lighting (2), each coupling guide (6, 7) being configured to bring a light beam (8, 9) from a light source (3) into said lighting guide (2), said device (1 ) being configured so that areas (4, 5) of the illumination guide (2) are illuminated independently of each other by each of said light beams (8, 9),
caractérisé en ce que les extrémités de sortie (13) des guides de couplage (6, 7) pénètrent tangentiellement dans le guide d'éclairage (2), les rayons sortant desdits guides de couplage ayant un angle d'incidence permettant la réflexion de la lumière dans lesdits guides d'éclairage (2) ; et en ce que les extrémités de sortie (13) sont disposées le long du guide d'éclairage (2), de sorte que les sens de propagation de chaque faisceau de lumière (8, 9) sont opposés l'un à l'autre à la sortie du guide de couplage (6, 7). characterized in that the outlet ends (13) of the coupling guides (6, 7) penetrate tangentially into the illumination guide (2), the rays issuing from said coupling guides having an angle of incidence allowing reflection of the light in said light guides (2); and in that the output ends (13) are arranged along the illumination guide (2), so that the propagation directions of each light beam (8, 9) are opposite each other at the output of the coupling guide (6, 7).
2. Dispositif d'éclairage selon la revendication 1 , dans lequel le guide d'éclairage (2) est un guide linéaire. 2. Lighting device according to claim 1, wherein the lighting guide (2) is a linear guide.
3. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, dans lequel les guides de couplage (6, 7) sont des canaux linéaires munis d'une extrémité d'entrée (12) et d'une extrémité de sortie (13) du faisceau de lumière (8, 9). Illumination device according to any one of the preceding claims, wherein the coupling guides (6, 7) are linear channels provided with an input end (12) and an output end (13). ) of the light beam (8, 9).
4. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, dans lequel ledit les guides de couplage (6, 7) ont une section (10, 1 1 ) dont la valeur augmente de l'extrémité d'entrée (12) à l'extrémité de sortie (13). 4. Lighting device according to any one of the preceding claims, wherein said coupling guides (6, 7) have a section (10, 1 1) whose value increases from the input end (12). at the outlet end (13).
5. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, dans lequel les guides de couplage (6, 7) ont, à leur extrémité de sortie, une section (10, 1 1 ) de surface inférieure ou égale à celle du guide d'éclairage (2). 5. Lighting device according to any one of the preceding claims, wherein the coupling guides (6, 7) have, at their outlet end, a section (10, 1 1) of surface less than or equal to that of the lighting guide (2).
6. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, dans lequel les guides de couplage (6, 7) et le guide d'éclairage (2) sont formés d'une seule matière. 6. Lighting device according to any one of the preceding claims, wherein the coupling guides (6, 7) and the lighting guide (2) are formed of a single material.
7. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, dans lequel les guides de couplage (6, 7) sont disposés dans un plan sensiblement perpendiculaire à la direction de propagation de la lumière hors du dispositif (1 ). 7. Lighting device according to any one of the preceding claims, wherein the coupling guides (6, 7) are arranged in a plane substantially perpendicular to the direction of propagation of the light from the device (1).
8. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, dans lequel ledit guide d'éclairage (2) comprend des motifs de réflexion (14) de la lumière. 8. Lighting device according to any one of the preceding claims, wherein said lighting guide (2) comprises reflection patterns (14) of the light.
9. Dispositif d'éclairage selon la revendication 8, dans lequel lesdits motifs de réflexion (14) de la lumière permettent de réfléchir la lumière dans des directions différentes selon la zone (4, 5) du guide d'éclairage (2), afin d'éclairer l'habitacle dans des directions différentes. The lighting device according to claim 8, wherein said light reflecting patterns (14) allow light to be reflected in different directions according to the area (4, 5) of the lighting guide (2), so that to illuminate the cabin in different directions.
10. Dispositif d'éclairage selon la revendication 9, dans lequel lesdits motifs de réflexion sont des prismes (14). The illumination device of claim 9, wherein said reflection patterns are prisms (14).
1 1 . Dispositif d'éclairage selon la revendication 10, dans lequel lesdits prismes (14) ont des angles de réflexion différents selon la zone (4, 5) du guide d'éclairage (2), afin d'éclairer l'habitacle dans des directions différentes. 1 1. Lighting device according to claim 10, wherein said prisms (14) have different angles of reflection according to the area (4, 5) of the lighting guide (2), in order to illuminate the passenger compartment in different directions .
EP13765728.4A 2012-09-26 2013-09-20 Lighting device, in particular for a motor vehicle Pending EP2900520A1 (en)

Applications Claiming Priority (2)

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FR1259024A FR2995971B1 (en) 2012-09-26 2012-09-26 LIGHTING DEVICE, IN PARTICULAR FOR MOTOR VEHICLE.
PCT/EP2013/069562 WO2014048847A1 (en) 2012-09-26 2013-09-20 Lighting device, in particular for a motor vehicle

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EP2900520A1 true EP2900520A1 (en) 2015-08-05

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CN204687953U (en) 2015-10-07

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