EP2738448A2 - Illuminating and/or signalling device, more particularly for automobile vehicle - Google Patents

Illuminating and/or signalling device, more particularly for automobile vehicle Download PDF

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Publication number
EP2738448A2
EP2738448A2 EP13194055.3A EP13194055A EP2738448A2 EP 2738448 A2 EP2738448 A2 EP 2738448A2 EP 13194055 A EP13194055 A EP 13194055A EP 2738448 A2 EP2738448 A2 EP 2738448A2
Authority
EP
European Patent Office
Prior art keywords
light
guide
interface
emitting
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13194055.3A
Other languages
German (de)
French (fr)
Other versions
EP2738448A3 (en
Inventor
Jean-François Doha
Sylvain Giraud
Arnaud Perrotin
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 EP2738448A2 publication Critical patent/EP2738448A2/en
Publication of EP2738448A3 publication Critical patent/EP2738448A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/249—Light guides with two or more light sources being coupled into the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/251—Light guides the light guides being used to transmit light from remote light sources

Definitions

  • the present invention relates to a lighting and / or signaling device, in particular for a motor vehicle. It is particularly intended for traffic lights and / or daytime running lights without being limited to such applications.
  • Devices with a light source usually a light-emitting diode, and a light guide in the form of a bead or sheet from which light is emitted in a free geometric pattern are thus known.
  • the light propagates in the guide by total reflection to an exit face, which projects the light so as to be seen by the vehicles that follow or precede.
  • an exit face which projects the light so as to be seen by the vehicles that follow or precede.
  • These devices today use light sources comprising a support for supplying power to a single light emitting diode, said single-component light source.
  • the sources have a limited light intensity.
  • the entrance surface of the light is located at a slice of the guide, of similar thickness. The integration of a plurality of single-component light sources along said entrance face is then possible and provides a good light intensity.
  • the invention therefore aims to obtain a device, provided with a light guide, in particular in the form of a cord, capable of achieving the brightness criteria set by the regulations while limiting the number of light sources.
  • the lighting and / or signaling device in particular for a motor vehicle, comprises at least one light source and one light guide, said source comprising a support and a plurality of transmission components.
  • light arranged on said support so as to emit a light beam, said device being configured to direct said beam towards said guide
  • said support is a printed circuit and / or said light-emitting components are light-emitting diodes, wherein said light-emitting components are arranged to define a transmitting surface of said light beam on a face of said support, wherein said light source is configured so that said transmitting surface has a longitudinal extension axis
  • said light guide comprises at least one emitting portion configured to emit light outside said guide, and at least one guide portion, located between said source and said transmitting portion, configured to transmit said light beam from said source to said transmitting portion, characterized in that said guide portion has a smaller section than that of said emitting portion.
  • the light emitters are integrated into the source and a light beam having a higher luminous intensity is available while limiting the integration difficulties. of the light source or sources in the device. Indeed, for a given light intensity emitted by said device, they are less numerous than in the case of the use of single-component sources. In other words, such a solution facilitates the coupling between the light source (s) and the guide.
  • the invention also relates to a lighting and / or signaling unit comprising said device.
  • the invention relates to a lighting and / or signaling device.
  • Said device will find its applications as a lantern and / or traffic light and / or daytime running light, without this being considered as limiting.
  • Said device comprising at least one light source 1 and a light guide 2.
  • said light source 1 comprises a support 4 and a plurality of light emitting components 6, here four, schematically illustrated in dashed lines. Said components 6 are arranged on said support 4 so as to emit a light beam.
  • a light source 1 is also called multi-component light source as opposed to the so-called single-component sources, comprising only one light emitter. They have the advantage of offering greater light output with a higher degree of integration.
  • the components 6 of the same light source 1 share the same support 4.
  • Said support 4 is, for example, a printed circuit. It serves, in particular to the attachment of said components 6 light emitters and / or their power supply. It may be a support type SMI or insulated metal substrate. Optionally, said support 4 further comprises control components of the supply current of said light emitting components 6.
  • Said light emitting components 6 are, for example, light emitting diodes. They emit a white light, because the white diodes are the most powerful at the moment.
  • Said light emitting components 6, in this case said light-emitting diodes, are arranged so as to define a transmission surface 10 of said light beam on a face 12 of said support 4.
  • said light-emitting components are arranged on the same side of the support 4, in a dedicated area thereof. That is, the beam emitted by said emitting surface 10 has a light intensity which is not necessarily completely homogeneous.
  • Said emission surface may in particular have more illuminating areas than others.
  • Said light emitting components 6, however, are arranged sufficiently close inside said emitting surface 10 to avoid giving the impression of the existence of non-illuminating areas between the latter.
  • Said light source 2 can be configured so that said transmission surface 10 has a longitudinal extension axis. In other words, said emission surface 10 has a preferred direction of elongation. In other words, said emission surface is neither square nor circular. It is here substantially rectangular.
  • said device is configured to direct said beam towards said guide 2.
  • the light source (s) 1 are here arranged opposite one or more input faces 14 of the light guide 2 so that that said light beam emitted by the or each of said light sources 1 penetrates inside said light guide 2 by said at least one input face 14 of said guide 2.
  • Said light guide 2 is configured to guide the light entering through the input face (s) 14 up to an exit face 16 of the guide 2, in particular by total reflection.
  • said guide 2 comprises a reflection face 18, provided with optical units, not illustrated, allowing part of the light rays propagating in the guide 2, to exit through the output face 16, provided opposite to said reflection face 18.
  • Said light guide 2 is here a linear guide of rectilinear or curved longitudinal shape, according to the needs of use of the device 1.
  • said guide 2 is in the form of a cord or elongated element, it is that is, an element having a cross-section whose dimensions are much smaller than its length.
  • Devices equipped with such guides 2 are particularly interesting because they can be arranged in multiple ways, in a minimum of space. It is thus possible to give guides 2 original shapes, and allow aesthetic creations with innovative design.
  • Said light guide 2 here comprises at least one emitting portion 20 configured to emit light outside said guide 2, and at least one guiding portion 22, located between said source 1 and said emitting portion 20, configured to transmit said beam from said source 1 to said emitting portion 20.
  • the at least one input face 12 of said guide 2 is at the level of said guide portion or portions 22 while said reflection face (s) 18 and exit face 16 are located at said emitting portion 20.
  • Said emitting portion 20 has, for example, a circular section and / or constant, disregarding the optical patterns made.
  • the device comprises a single said light source 1 and said guide 2 comprises a single said guide portion 22.
  • Said emitting portion 20 is here in the continuity of said guide portion 22.
  • Said guide portion 22 and said emitting portion 20 thus have an identical section, for example circular.
  • said device comprises several said light sources 1 and said light guide 2 comprises a plurality of guide portions 22, situated between each of said sources 1 and said emitting portion 20.
  • said light guide 2 comprises a plurality of guide portions 22, situated between each of said sources 1 and said emitting portion 20.
  • two light sources are provided. 1 and two guide portions 22, respectively associated.
  • Said guide portions 22 advantageously have a transverse axis of elongation, oriented along the longitudinal axis of the emission surface 10 of said light sources 1.
  • said guide portions 22 are also elongate in a given direction and their direction of elongation is matched to that of the emission surface of the corresponding light sources 1.
  • the section of the one or more guide portions 22 is, for example, rectangular, as in FIGS. Figures 4 and 5 , and / or oval, as figures 6 and 7 .
  • said guide portions 22 comprise an interface zone 24 common with said emitting portion 20, located in particular at an input face 26 of said emitting portion 20.
  • said guide 2 comprises an interface zone 24 between said guide portions 22, defined by a plane.
  • the guide 2 has a convergence zone situated upstream of said emitting portion 20.
  • Said plane 28 is, for example, perpendicular to the input face 26 of said emitting portion 22.
  • Said guide portions are advantageously symmetrical to on both sides of said plane in said convergence zone.
  • Said guide portions 22 are here, for example, of circular and / or constant section, before the convergence zone.
  • the coupling portion 32 formed by the joining of said guide portions 22 in said convergence zone may also be of constant section to said input face 26 of the emitting portion 20, that is to say, to be of section similar to the profile of said interface area 28.
  • the latter may have a symmetrical shape vis-à-vis an axis of symmetry of said inlet face 26 of the emitting portion 20, including one of its diameters.
  • said guide portions 22 converge at the same point on the surface of said input face 26 of the emitting portion 20, in particular its center. According to another configuration, they converge at two distinct points of said input face 26 of the emitting portion 20, for example, about 2 mm apart.
  • each guide portion 22 comprises an interface zone 30 with said emitting portion 20, in particular its input face 26.
  • Said interface zones 30 are here distinct from one another, for example contiguous. In this way, the reduction of optical losses is promoted.
  • Said interface zones 30 may be symmetrical with respect to each other with respect to an axis of symmetry of said input face 26 of the emitting portion 20, in particular one of its diameters.
  • said interface zone or zones 24, 30 are centered on said input face 26 of said transmitting portion 2. Such a characteristic also contributes to reducing the optical losses.
  • each of said guide portion 22 will have a smaller section than that of said transmitting portion 20. More precisely, here, the surface of said interface zone 24, according to the embodiment of the Figures 2 and 3 , is smaller than the section of the transmitting portion. In other words, the section of said coupling portion 32 is smaller than the section of the emitting zone 20.
  • the invention further relates to a lighting and / or signaling unit comprising one or more devices as described above.
  • Said housing may include other types of lighting and / or signaling devices so as to combine several optical functions.

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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)

Abstract

The lighting and or signaling device has each light source (1) and a light guide. The light source has light emitting diodes arranged on a printed circuit. The light guide has an emitting portion (20) and a light guide portion (22) situated between the light source and emitting portion. The cross-section of the light guide portion is smaller than that of the emitting portion.

Description

La présente invention concerne un dispositif d'éclairage et/ou de signalisation, notamment pour véhicule automobile. Elle est en particulier destinée aux feux de signalisation et/ou d'éclairage diurnes sans pour autant être limitée à de telles applications.The present invention relates to a lighting and / or signaling device, in particular for a motor vehicle. It is particularly intended for traffic lights and / or daytime running lights without being limited to such applications.

Dans ce domaine, on sait que les constructeurs souhaitent se singulariser, notamment avec des éléments visuellement originaux, afin d'être identifiables plus facilement par rapport aux concurrents.In this field, we know that manufacturers want to stand out, especially with visually original elements, to be more easily identifiable compared to competitors.

Il est ainsi connu des dispositifs munis d'une source lumineuse, en général une diode électroluminescente, et un guide de lumière sous forme de cordon ou de nappe à partir duquel de la lumière est émise selon un motif géométrique libre. La lumière se propage dans le guide par réflexion totale jusqu'à une face de sortie, qui projette la lumière de façon à être vue par les véhicules qui suivent ou qui précèdent. Dans le domaine automobile, de tels dispositifs sont appréciés car ils permettent de proposer une grande variété de formes et de types de lumière.Devices with a light source, usually a light-emitting diode, and a light guide in the form of a bead or sheet from which light is emitted in a free geometric pattern are thus known. The light propagates in the guide by total reflection to an exit face, which projects the light so as to be seen by the vehicles that follow or precede. In the automotive field, such devices are appreciated because they allow to offer a wide variety of shapes and types of light.

Ces dispositifs utilisent aujourd'hui des sources de lumière comprenant un support servant à alimenter en courant une diode électroluminescente unique, dite source de lumière mono-composant. Lesdites sources présentent une intensité lumineuse limitée.These devices today use light sources comprising a support for supplying power to a single light emitting diode, said single-component light source. The sources have a limited light intensity.

Cela étant, leur surface d'émission est de petite taille, à savoir d'environ 1 mm de diamètre. Dans le cas de guides de lumière présentant une configuration surfacique, la surface d'entrée de la lumière se situe au niveau d'une tranche du guide, d'épaisseur semblable. L'intégration d'une pluralité de sources de lumière mono-composant le long de ladite face d'entrée est alors envisageable et permet d'obtenir une bonne intensité lumineuse.However, their emission surface is small, ie about 1 mm in diameter. In the case of light guides having a surface configuration, the entrance surface of the light is located at a slice of the guide, of similar thickness. The integration of a plurality of single-component light sources along said entrance face is then possible and provides a good light intensity.

Dans le cas de guide sous forme de cordon présentant une section dont le diamètre souhaité est d'environ une dizaine de millimètre, multiplier le nombre de sources de lumière mono-composant pour atteindre le niveau de luminosité souhaité présente des limites. En effet, le couplage d'un grand nombre de sources avec le guide est complexe et les pertes de luminosité générées par les difficultés de couplage limitent en outre l'intérêt d'une telle solution.In the case of a guide in the form of a bead having a section whose desired diameter is about ten millimeters, multiplying the number of single-component light sources to reach the desired level of brightness has limits. Indeed, the coupling of a large number of sources with the guide is complex and the loss of brightness generated by the coupling difficulties further limit the interest of such a solution.

L'invention vise donc à obtenir un dispositif, muni d'un guide de lumière, en particulier sous forme de cordon, capable d'atteindre les critères de luminosité fixé par la réglementation tout en limitant le nombre de sources lumineuses.The invention therefore aims to obtain a device, provided with a light guide, in particular in the form of a cord, capable of achieving the brightness criteria set by the regulations while limiting the number of light sources.

Pour cela, le dispositif d'éclairage et/ou de signalisation, notamment pour véhicule automobile, conforme à l'invention, comprend au moins une source de lumière et un guide de lumière, ladite source comprenant un support et une pluralité de composants émetteurs de lumière, disposés sur ledit support de façon à émettre un faisceau lumineux, ledit dispositif étant configuré pour diriger ledit faisceau vers ledit guide, dans lequel ledit support est un circuit imprimé et/ou lesdits composants émetteurs de lumière sont des diodes électroluminescentes, dans lequel lesdits composants émetteurs de lumière sont disposés de façon à définir une surface d'émission dudit faisceau lumineux sur une face dudit support, dans lequel ladite source de lumière est configurée de façon à ce que ladite surface d'émission présente un axe d'extension longitudinale, dans lequel ledit guide de lumière comprend au moins une portion émettrice, configurée pour émettre de la lumière en dehors dudit guide, et au moins une portion de guidage, située entre ladite source et ladite portion émettrice, configurée pour transmettre ledit faisceau lumineux de ladite source à ladite portion émettrice,
caractérisé en ce que ladite portion de guidage présente une section plus faible que celle de ladite portion émettrice.For this purpose, the lighting and / or signaling device, in particular for a motor vehicle, according to the invention, comprises at least one light source and one light guide, said source comprising a support and a plurality of transmission components. light, arranged on said support so as to emit a light beam, said device being configured to direct said beam towards said guide, wherein said support is a printed circuit and / or said light-emitting components are light-emitting diodes, wherein said light-emitting components are arranged to define a transmitting surface of said light beam on a face of said support, wherein said light source is configured so that said transmitting surface has a longitudinal extension axis, wherein said light guide comprises at least one emitting portion configured to emit light outside said guide, and at least one guide portion, located between said source and said transmitting portion, configured to transmit said light beam from said source to said transmitting portion,
characterized in that said guide portion has a smaller section than that of said emitting portion.

En utilisant de telles sources de lumière, aussi appelées sources multi-composants, on réalise une intégration des émetteurs de lumière au sein de la source et on dispose d'un faisceau lumineux présentant une intensité lumineuse plus élevée tout en limitant les difficultés d'intégration de la ou des sources lumineuses dans le dispositif. En effet, pour une intensité lumineuse donnée émise par ledit dispositif, elles sont moins nombreuses que dans le cas de l'utilisation de sources mono-composant. Autrement dit, une telle solution facilite le couplage entre la ou les sources lumineuses et le guide.By using such light sources, also called multi-component sources, the light emitters are integrated into the source and a light beam having a higher luminous intensity is available while limiting the integration difficulties. of the light source or sources in the device. Indeed, for a given light intensity emitted by said device, they are less numerous than in the case of the use of single-component sources. In other words, such a solution facilitates the coupling between the light source (s) and the guide.

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

  • un axe d'allongement transversal de la ou desdites portions de guidage est orienté selon l'axe longitudinal de la surface d'émission de la ou desdites sources de lumière,
  • la section de la ou desdites portions de guidage est rectangulaire et/ou ovale,
  • ledit dispositif comprend plusieurs dites sources de lumière,
  • ledit guide de lumière comprend plusieurs portions de guidage, situées entre chacune desdites sources et ladite portion émettrice,
  • chaque portion de guidage comprend une zone d'interface avec ladite portion émettrice, lesdites zones d'interface étant distinctes l'une de l'autre,
  • lesdites zones d'interface entre chacune des portions de guidage et la portion émettrice sont des zones contigües,
  • en variante, lesdites portions de guidage comprennent une zone d'interface commune avec ladite portion émettrice,
  • ledit guide comprend alors une zone d'interface entre lesdites portions de guidage, notamment définie par un plan,
  • la ou lesdites zones d'interface sont situées au niveau d'une face d'entrée de ladite portion émettrice,
  • la ou lesdites zones d'interface sont centrées sur ladite face d'entrée de ladite portion émettrice,
  • la ou lesdites portions de guidage convergent ou non vers un même point de ladite surface d'entrée,
  • la surface de ladite zone d'interface et/ou la somme des surfaces desdites zones d'interface est inférieure à la section de la portion émettrice.
According to various embodiments of the invention, which may be taken together or separately:
  • a transverse elongation axis of the at least one guide portion is oriented along the longitudinal axis of the emission surface of the at least one light source,
  • the section of the one or more guide portions is rectangular and / or oval,
  • said device comprises a plurality of said light sources,
  • said light guide comprises a plurality of guide portions, located between each of said sources and said emitting portion,
  • each guiding portion comprises an interface zone with said emitting portion, said interface zones being distinct from one another,
  • said interface areas between each of the guide portions and the transmitting portion are contiguous zones,
  • alternatively, said guide portions comprise a common interface area with said transmitting portion,
  • said guide then comprises an interface zone between said guide portions, in particular defined by a plane,
  • said interface zone or zones are located at an input face of said transmitting portion,
  • the said interface zone or zones are centered on the said input face of the said transmitting portion,
  • said guide portion or portions converge or not towards the same point of said input surface,
  • the surface of said interface zone and / or the sum of the surfaces of said interface zones is smaller than the section of the emitting portion.

L'invention concerne également un boîtier d'éclairage et/ou de signalisation comprenant ledit dispositif.The invention also relates to a lighting and / or signaling unit comprising said device.

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

  • la figure 1 illustre une vue en perspective d'un dispositif d'éclairage ou de signalisation selon un premier mode de réalisation de l'invention, le guide de lumière dudit dispositif étant illustré sur une partie seulement de sa longueur,
  • la figure 2 illustre une vue en perspective d'un dispositif d'éclairage ou de signalisation selon un deuxième mode de réalisation de l'invention, le guide de lumière dudit dispositif étant illustré sur une partie seulement de sa longueur,
  • la figure 3 est une vue de dessus d'après la figure 3
  • la figure 4 illustre une vue en perspective d'un dispositif d'éclairage ou de signalisation selon un troisième mode de réalisation de l'invention, le guide de lumière dudit dispositif étant illustré sur une partie seulement de sa longueur,
  • la figure 5 est une vue de dessus d'après la figure 4
  • la figure 6 illustre une vue en perspective d'un dispositif d'éclairage ou de signalisation selon un quatrième mode de réalisation de l'invention, le guide de lumière dudit dispositif étant illustré sur une partie seulement de sa longueur,
  • la figure 7 est une vue de dessus d'après la figure 6,
  • la figure 8 illustre de façon schématique un exemple de source de lumière d'un dispositif d'éclairage et/ou de signalisation conforme à l'invention.
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 accompanying drawings in which:
  • the figure 1 illustrates a perspective view of a lighting or signaling device according to a first embodiment of the invention, the light guide of said device being illustrated over only part of its length,
  • the figure 2 illustrates a perspective view of a lighting or signaling device according to a second embodiment of the invention, the light guide of said device being illustrated over only part of its length,
  • the figure 3 is a view from above according to the figure 3
  • the figure 4 illustrates a perspective view of a lighting or signaling device according to a third embodiment of the invention, the light guide of said device being illustrated on only part of its length,
  • the figure 5 is a view from above according to the figure 4
  • the figure 6 illustrates a perspective view of a lighting or signaling device according to a fourth embodiment of the invention, the light guide of said device being illustrated over only part of its length,
  • the figure 7 is a view from above according to the figure 6 ,
  • the figure 8 illustrates schematically an example of a light source of a lighting and / or signaling device according to the invention.

Comme illustré aux figures 1 à 7, l'invention concerne un dispositif d'éclairage et/ou de signalisation. Ledit dispositif trouvera ses applications comme lanterne et/ou feu de signalisation et/ou d'éclairage diurne, sans que ceci puisse être considéré comme limitatif.As illustrated in Figures 1 to 7 the invention relates to a lighting and / or signaling device. Said device will find its applications as a lantern and / or traffic light and / or daytime running light, without this being considered as limiting.

Ledit dispositif comprenant au moins une source de lumière 1 et un guide de lumière 2.Said device comprising at least one light source 1 and a light guide 2.

Comme cela est plus visible à la figure 8, ladite source de lumière 1 comprend un support 4 et une pluralité de composants 6 émetteurs de lumière, ici quatre, illustrés schématiquement en pointillés. Lesdits composants 6 sont disposés sur ledit support 4 de façon à émettre un faisceau lumineux. Une telle source de lumière 1 est également appelée source de lumière multi-composants par opposition aux sources, dites mono-composant, ne comprenant qu'un seul émetteur de lumière. Elles présentent l'avantage d'offrir une plus grande puissance lumineuse avec un plus haut degré d'intégration. En particulier, les composants 6 d'une même source lumineuse 1 partagent le même support 4.As is more visible in the figure 8 said light source 1 comprises a support 4 and a plurality of light emitting components 6, here four, schematically illustrated in dashed lines. Said components 6 are arranged on said support 4 so as to emit a light beam. Such a light source 1 is also called multi-component light source as opposed to the so-called single-component sources, comprising only one light emitter. They have the advantage of offering greater light output with a higher degree of integration. In particular, the components 6 of the same light source 1 share the same support 4.

Ledit support 4 est, par exemple, un circuit imprimé. Il sert, notamment à la fixation desdits composants 6 émetteurs de lumière et/ou à leur alimentation en courant électrique. Il pourra s'agir d'un support du type SMI ou substrat métallique isolé. De façon optionnelle, ledit support 4 comprend en outre des composants de contrôle du courant d'alimentation desdits composants 6 émetteurs de lumière.Said support 4 is, for example, a printed circuit. It serves, in particular to the attachment of said components 6 light emitters and / or their power supply. It may be a support type SMI or insulated metal substrate. Optionally, said support 4 further comprises control components of the supply current of said light emitting components 6.

Lesdits composants 6 émetteurs de lumière sont, par exemple, des diodes électroluminescentes. Elles émettent avantageusement une lumière blanche, car les diodes blanches sont les plus puissantes actuellement.Said light emitting components 6 are, for example, light emitting diodes. They emit a white light, because the white diodes are the most powerful at the moment.

Lesdits composants émetteurs de lumière 6, ici lesdites diodes électroluminescentes, sont disposés de façon à définir une surface d'émission 10 dudit faisceau lumineux sur une face 12 dudit support 4. Autrement dit, lesdits composants émetteurs de lumière sont disposés d'un même côté du support 4, dans une zone dédiée de celui-ci. Cela étant, le faisceau émis par ladite surface d'émission 10 présente une intensité lumineuse qui n'est pas nécessairement totalement homogène. Ladite surface d'émission pourra en particulier présenter des zones plus éclairantes que d'autres. Lesdits composants 6 émetteurs de lumière sont cependant disposés de façon suffisamment proche à l'intérieur de ladite surface d'émission 10 pour éviter de donner l'impression de l'existence de zones non-éclairantes entre ces derniers. Ladite source de lumière 2 pourra être configurée de façon à ce que ladite surface d'émission 10 présente un axe d'extension longitudinale. Autrement dit, ladite surface d'émission 10 présente une direction d'allongement privilégiée. Encore autrement dit, ladite surface d'émission n'est ni carrée, ni circulaire. Elle est ici sensiblement rectangulaire.Said light emitting components 6, in this case said light-emitting diodes, are arranged so as to define a transmission surface 10 of said light beam on a face 12 of said support 4. In other words, said light-emitting components are arranged on the same side of the support 4, in a dedicated area thereof. That is, the beam emitted by said emitting surface 10 has a light intensity which is not necessarily completely homogeneous. Said emission surface may in particular have more illuminating areas than others. Said light emitting components 6, however, are arranged sufficiently close inside said emitting surface 10 to avoid giving the impression of the existence of non-illuminating areas between the latter. Said light source 2 can be configured so that said transmission surface 10 has a longitudinal extension axis. In other words, said emission surface 10 has a preferred direction of elongation. In other words, said emission surface is neither square nor circular. It is here substantially rectangular.

Si l'on se reporte de nouveau aux figures 1 à 7, on constate que ledit dispositif est configuré pour diriger ledit faisceau vers ledit guide 2. La ou lesdites sources de lumière 1 sont ici agencées en vis-à-vis d'une ou de faces d'entrée 14 du guide de lumière 2 de sorte que ledit faisceau lumineux émis par la ou chacune desdites sources de lumière 1 pénètre à l'intérieur dudit guide de lumière 2 par la ou lesdites faces d'entrée 14 dudit guide 2.If we go back to Figures 1 to 7 it is found that said device is configured to direct said beam towards said guide 2. The light source (s) 1 are here arranged opposite one or more input faces 14 of the light guide 2 so that that said light beam emitted by the or each of said light sources 1 penetrates inside said light guide 2 by said at least one input face 14 of said guide 2.

Ledit guide de lumière 2 est configuré pour guider la lumière entrant par la ou les faces d'entrée 14, jusqu'à une face de sortie 16 du guide 2, notamment par réflexion totale. De manière connue, ledit guide 2 comprend une face de réflexion 18, munie de motifs optiques, non-illustrés, permettant à une partie des rayons lumineux se propageant dans le guide 2, d'en sortir par la face de sortie 16, prévue opposée à ladite face de réflexion 18.Said light guide 2 is configured to guide the light entering through the input face (s) 14 up to an exit face 16 of the guide 2, in particular by total reflection. In known manner, said guide 2 comprises a reflection face 18, provided with optical units, not illustrated, allowing part of the light rays propagating in the guide 2, to exit through the output face 16, provided opposite to said reflection face 18.

Ledit guide de lumière 2 est ici un guide linéaire, de forme longitudinale rectiligne ou courbée, selon les besoins d'utilisation du dispositif 1. Autrement dit, ledit guide 2 se présente sous la forme d'un cordon ou élément longiligne, c'est-à-dire d'un élément présentant une section droite dont les dimensions sont très inférieures à sa longueur. Les dispositifs équipés de tels guides 2 sont particulièrement intéressants car ils peuvent être agencés de multiples manières, dans un minimum de place. Il est ainsi possible de donner aux guides 2 des formes originales, et permettre des créations esthétiques au design novateur.Said light guide 2 is here a linear guide of rectilinear or curved longitudinal shape, according to the needs of use of the device 1. In other words, said guide 2 is in the form of a cord or elongated element, it is that is, an element having a cross-section whose dimensions are much smaller than its length. Devices equipped with such guides 2 are particularly interesting because they can be arranged in multiple ways, in a minimum of space. It is thus possible to give guides 2 original shapes, and allow aesthetic creations with innovative design.

Ledit guide de lumière 2 comprend ici au moins une portion émettrice 20 configurée pour émettre de la lumière en dehors dudit guide 2, et au moins une portion de guidage 22, située entre ladite source 1 et ladite portion émettrice 20, configurée pour transmettre ledit faisceau lumineux de ladite source 1 à ladite portion émettrice 20. Autrement dit, la ou lesdites faces d'entrée 12 dudit guide 2 se trouvent au niveau de la ou lesdites portions de guidage 22 tandis que la ou lesdites faces de réflexion 18 et de sortie 16 se trouvent au niveau de ladite portion émettrice 20. Ladite portion émettrice 20 présente, par exemple, une section circulaire et/ou constante, en faisant abstraction des motifs optiques réalisés.Said light guide 2 here comprises at least one emitting portion 20 configured to emit light outside said guide 2, and at least one guiding portion 22, located between said source 1 and said emitting portion 20, configured to transmit said beam from said source 1 to said emitting portion 20. In other words, the at least one input face 12 of said guide 2 is at the level of said guide portion or portions 22 while said reflection face (s) 18 and exit face 16 are located at said emitting portion 20. Said emitting portion 20 has, for example, a circular section and / or constant, disregarding the optical patterns made.

Selon le mode de réalisation de la figure 1, le dispositif comprend une seule dite source de lumière 1 et ledit guide 2 comprend une seule dite portion de guidage 22. Ladite portion émettrice 20 est ici dans la continuité de ladite portion de guidage 22. Ladite portion de guidage 22 et ladite portion émettrice 20 présentent ainsi une section identique, par exemple circulaire.According to the embodiment of the figure 1 , the device comprises a single said light source 1 and said guide 2 comprises a single said guide portion 22. Said emitting portion 20 is here in the continuity of said guide portion 22. Said guide portion 22 and said emitting portion 20 thus have an identical section, for example circular.

Selon les autres modes de réalisation illustrés, ledit dispositif comprend plusieurs dites sources de lumière 1 et ledit guide de lumière 2 comprend plusieurs portions de guidage 22, situées entre chacune desdites sources 1 et ladite portion émettrice 20. Il est ici prévu deux sources de lumière 1 et deux portions de guidage 22, respectivement associées.According to the other illustrated embodiments, said device comprises several said light sources 1 and said light guide 2 comprises a plurality of guide portions 22, situated between each of said sources 1 and said emitting portion 20. Here two light sources are provided. 1 and two guide portions 22, respectively associated.

Lesdites portions de guidage 22 présentent avantageusement un axe d'allongement transversal, orienté selon l'axe longitudinal de la surface d'émission 10 desdites sources de lumière 1. Autrement dit lesdites portions de guidage 22 sont elles aussi allongées dans une direction donnée et l'on fait correspondre leur direction d'allongement à celle de la surface d'émission des sources de lumière 1 correspondante. Dans ce but, la section de la ou desdites portions de guidage 22 est, par exemple, rectangulaire, comme aux figures 4 et 5, et/ou ovale, comme aux figures 6 et 7.Said guide portions 22 advantageously have a transverse axis of elongation, oriented along the longitudinal axis of the emission surface 10 of said light sources 1. In other words, said guide portions 22 are also elongate in a given direction and their direction of elongation is matched to that of the emission surface of the corresponding light sources 1. For this purpose, the section of the one or more guide portions 22 is, for example, rectangular, as in FIGS. Figures 4 and 5 , and / or oval, as figures 6 and 7 .

Si l'on se reporte aux figures 2 et 3, on constate que, dans une première variante, lesdites portions de guidage 22 comprennent une zone d'interface 24 commune avec ladite portion émettrice 20, située en particulier au niveau d'une face d'entrée 26 de ladite portion émettrice 20.If we refer to Figures 2 and 3 it is found that, in a first variant, said guide portions 22 comprise an interface zone 24 common with said emitting portion 20, located in particular at an input face 26 of said emitting portion 20.

Dans cette variante, ledit guide 2 comprend une zone d'interface 24 entre lesdites portions de guidage 22, définie par un plan. Autrement dit, le guide 2 présente une zone de convergence située en amont de ladite portion émettrice 20. Ledit plan 28 est, par exemple, perpendiculaire à la face d'entrée 26 de ladite portion émettrice 22. Lesdites portions de guidage sont avantageusement symétriques de part et d'autre dudit plan dans ladite zone de convergence. Lesdites portions de guidage 22 sont ici, par exemple, de section circulaire et/ou constante, avant la zone de convergence. La portion de couplage 32 formée par la réunion desdites portions de guidage 22 dans ladite zone de convergence pourra également être de section constante jusqu'à ladite face d'entrée 26 de la portion émettrice 20, c'est-à-dire, être de section semblable au profil de ladite zone d'interface 28.In this variant, said guide 2 comprises an interface zone 24 between said guide portions 22, defined by a plane. In other words, the guide 2 has a convergence zone situated upstream of said emitting portion 20. Said plane 28 is, for example, perpendicular to the input face 26 of said emitting portion 22. Said guide portions are advantageously symmetrical to on both sides of said plane in said convergence zone. Said guide portions 22 are here, for example, of circular and / or constant section, before the convergence zone. The coupling portion 32 formed by the joining of said guide portions 22 in said convergence zone may also be of constant section to said input face 26 of the emitting portion 20, that is to say, to be of section similar to the profile of said interface area 28.

Cette dernière pourra présenter une forme symétrique vis-à-vis d'un axe de symétrie de ladite face d'entrée 26 de la portion émettrice 20, notamment un de ses diamètres.The latter may have a symmetrical shape vis-à-vis an axis of symmetry of said inlet face 26 of the emitting portion 20, including one of its diameters.

Selon une première configuration, lesdites portions de guidage 22 convergent en un même point à la surface de ladite face d'entrée 26 de la portion émettrice 20, notamment son centre. Selon une autre configuration, elles convergent vers deux points distincts de ladite face d'entrée 26 de la portion émettrice 20, par exemple, distant d'environ 2 mm.According to a first configuration, said guide portions 22 converge at the same point on the surface of said input face 26 of the emitting portion 20, in particular its center. According to another configuration, they converge at two distinct points of said input face 26 of the emitting portion 20, for example, about 2 mm apart.

En variante, selon les modes de réalisation des figures 4 à 7, chaque portion de guidage 22 comprend une zone d'interface 30 avec ladite portion émettrice 20, en particulier sa face d'entrée 26. Lesdites zones d'interface 30 sont ici distinctes l'une de l'autre, par exemple contigües. On favorise de la sorte la diminution des pertes optiques.Alternatively, according to the embodiments of the Figures 4 to 7 each guide portion 22 comprises an interface zone 30 with said emitting portion 20, in particular its input face 26. Said interface zones 30 are here distinct from one another, for example contiguous. In this way, the reduction of optical losses is promoted.

Lesdites zones d'interface 30 pourront être symétriques l'une par rapport à l'autre vis-à-vis d'un axe de symétrie de ladite face d'entrée 26 de la portion émettrice 20, notamment un de ses diamètres.Said interface zones 30 may be symmetrical with respect to each other with respect to an axis of symmetry of said input face 26 of the emitting portion 20, in particular one of its diameters.

Autrement dit, dans ces différents modes de réalisation, on peut considérer que la ou lesdites zones d'interface 24, 30 sont centrées sur ladite face d'entrée 26 de ladite portion émettrice 2. Une telle caractéristique contribue également à diminuer les pertes optiques.In other words, in these various embodiments, it may be considered that said interface zone or zones 24, 30 are centered on said input face 26 of said transmitting portion 2. Such a characteristic also contributes to reducing the optical losses.

Avantageusement, chacune desdites portion de guidage 22 présentera une section plus faible que celle de ladite portion émettrice 20. Plus précisément, ici, la surface de ladite zone d'interface 24, selon le mode de réalisation des figures 2 et 3, est inférieure à la section de la portion émettrice. Autrement dit, la section de ladite portion de couplage 32 est inférieure à la section de la zone émettrice 20.Advantageously, each of said guide portion 22 will have a smaller section than that of said transmitting portion 20. More precisely, here, the surface of said interface zone 24, according to the embodiment of the Figures 2 and 3 , is smaller than the section of the transmitting portion. In other words, the section of said coupling portion 32 is smaller than the section of the emitting zone 20.

Dans les modes de réalisation des figures 4 à 6, c'est la somme des surfaces desdites zones d'interface 30 qui est inférieure à la section de la portion émettrice 20.In the embodiments of Figures 4 to 6 it is the sum of the surfaces of said interface areas 30 which is smaller than the section of the emitting portion 20.

L'invention concerne encore un boîtier d'éclairage et/ou de signalisation comprenant un ou plusieurs dispositifs tels que décrit plus haut. Ledit boîtier pourra comprendre d'autres types de dispositifs d'éclairage et/ou de signalisation de façon à combiner plusieurs fonctions optiques.The invention further relates to a lighting and / or signaling unit comprising one or more devices as described above. Said housing may include other types of lighting and / or signaling devices so as to combine several optical functions.

Claims (11)

Dispositif d'éclairage et/ou de signalisation, notamment pour véhicule automobile, comprenant au moins une source de lumière (1) et un guide de lumière (2), ladite source (1) comprenant un support (4) et une pluralité de composants (6) émetteurs de lumière, disposés sur ledit support (4) de façon à émettre un faisceau lumineux, ledit dispositif étant configuré pour diriger ledit faisceau vers ledit guide (2), dans lequel ledit support (4) est un circuit imprimé et/ou lesdits composants (6) émetteurs de lumière sont des diodes électroluminescentes, dans lequel lesdits composants (6) émetteurs de lumière sont disposés de façon à définir une surface d'émission (10) dudit faisceau lumineux sur une face (12) dudit support (4), dans lequel ladite source de lumière (1) est configurée de façon à ce que ladite surface d'émission (10) présente un axe d'extension longitudinale, dans lequel ledit guide de lumière (2) comprend au moins une portion émettrice (20), configurée pour émettre de la lumière en dehors dudit guide (2), et au moins une portion de guidage (22), située entre ladite source (1) et ladite portion émettrice (20), configurée pour transmettre ledit faisceau lumineux de ladite source (1) à ladite portion émettrice (20),
caractérisé en ce que ladite portion de guidage (22) présente une section plus faible que celle de ladite portion émettrice (20).Lighting and / or signaling device, in particular for a motor vehicle, comprising at least one light source (1) and a light guide (2), said source (1) comprising a support (4) and a plurality of components (6) light emitters, arranged on said support (4) so as to emit a light beam, said device being configured to direct said beam towards said guide (2), wherein said support (4) is a printed circuit and / or said light emitting components (6) are light-emitting diodes, wherein said light-emitting components (6) are arranged to define an emission surface (10) of said light beam on a face (12) of said medium ( 4), wherein said light source (1) is configured such that said transmitting surface (10) has a longitudinal extension axis, wherein said light guide (2) comprises at least one emitting portion (20), with shown to emit light outside said guide (2), and at least one guide portion (22), located between said source (1) and said emitter portion (20), configured to transmit said light beam from said source ( 1) to said transmitting portion (20),
characterized in that said guide portion (22) has a smaller section than that of said emitter portion (20). Dispositif selon la revendication 1 dans lequel un axe d'allongement transversal de la ou desdites portions de guidage (22) est orienté selon l'axe longitudinal de la surface d'émission (10) de la ou desdites sources de lumière (1).Device according to claim 1 wherein an axis of transverse elongation of the one or more guide portions (22) is oriented along the longitudinal axis of the emission surface (10) of said light source (s) (1). Dispositif selon l'une quelconque des revendications 1 ou 2 dans lequel la section de la ou desdites portions de guidage (22) est rectangulaire et/ou ovale.Device according to any one of claims 1 or 2 wherein the section of the or said guide portions (22) is rectangular and / or oval. Dispositif selon l'une quelconque des revendications 1 à 3 dans lequel ledit dispositif comprend plusieurs dites sources de lumière (1).Device according to any one of claims 1 to 3 wherein said device comprises a plurality of said light sources (1). Dispositif selon la revendication 4 dans lequel ledit guide de lumière comprend plusieurs portions de guidage (22), situées entre chacune desdites sources (1) et ladite portion émettrice (20).Apparatus according to claim 4 wherein said light guide comprises a plurality of guide portions (22), located between each of said sources (1) and said emitter portion (20). Dispositif selon la revendication 5 dans lequel chaque portion de guidage (22) comprend une zone d'interface (30) avec ladite portion émettrice (20), lesdites zones d'interface (30) étant distinctes l'une de l'autre.The device of claim 5 wherein each guide portion (22) includes an interface area (30) with said emitter portion (20), said interface areas (30) being separate from each other. Dispositif selon la revendication 5 dans lequel lesdites portions de guidage (22) comprennent une zone d'interface (24) commune avec ladite portion émettrice (20).Apparatus according to claim 5 wherein said guide portions (22) comprise an interface area (24) common with said emitter portion (20). Dispositif selon l'une quelconque des revendications 6 ou 7 dans lequel la ou lesdites zones d'interface (24, 30) sont situées au niveau d'une face d'entrée (26) de ladite portion émettrice (20).Apparatus according to any one of claims 6 or 7 wherein said at least one interface area (24, 30) is located at an input face (26) of said transmitting portion (20). Dispositif selon la revendication 8 dans lequel la ou lesdites zones d'interface (24, 30) sont centrées sur ladite face d'entrée (26) de ladite portion émettrice (20).Apparatus according to claim 8 wherein said one or more interface areas (24, 30) are centered on said input face (26) of said transmitting portion (20). Dispositif selon l'une quelconque des revendications 7 à 9 dans lequel la surface de ladite zone d'interface (24) et/ou la somme des surfaces desdites zones d'interface (30) est inférieure à la section de la portion émettrice (20).Apparatus according to any of claims 7 to 9 wherein the area of said interface area (24) and / or the sum of the areas of said interface areas (30) is smaller than the section of the transmitting portion (20). ). Boîtier d'éclairage et/ou de signalisation comprenant un dispositif selon l'une quelconques des revendications précédentes.A lighting and / or signaling unit comprising a device according to any one of the preceding claims.
EP13194055.3A 2012-11-30 2013-11-22 Illuminating and/or signalling device, more particularly for automobile vehicle Withdrawn EP2738448A3 (en)

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FR2998942A1 (en) 2014-06-06
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US20140153272A1 (en) 2014-06-05
FR2998942B1 (en) 2018-08-17

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