EP3542102B1 - Lighting device with directable and photon-emitting and/or reflecting oleds - Google Patents

Lighting device with directable and photon-emitting and/or reflecting oleds Download PDF

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Publication number
EP3542102B1
EP3542102B1 EP17797699.0A EP17797699A EP3542102B1 EP 3542102 B1 EP3542102 B1 EP 3542102B1 EP 17797699 A EP17797699 A EP 17797699A EP 3542102 B1 EP3542102 B1 EP 3542102B1
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EP
European Patent Office
Prior art keywords
dok
organic light
emitting diodes
photons
light
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.)
Not-in-force
Application number
EP17797699.0A
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German (de)
French (fr)
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EP3542102A1 (en
Inventor
Christophe Le Dall
Whilk Marcelino GONCALVES
Nathalie Larribeau
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PSA Automobiles SA
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PSA Automobiles SA
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Publication of EP3542102A1 publication Critical patent/EP3542102A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/155—Surface emitters, e.g. organic light emitting diodes [OLED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/657—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by moving light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/20—Electroluminescent [EL] light sources

Definitions

  • the invention relates to lighting devices which are capable of delivering photons.
  • the term “lighting device” is understood to mean a device making it possible to illuminate and/or participate in a signaling and/or light signature function, whether indoors or outdoors.
  • lighting devices comprising at least one light emitting diode (or LED) light source, optionally of the organic type (or OLED ( “Organic Light-Emitting Diode”)).
  • LED light emitting diode
  • OLED Organic Light-Emitting Diode
  • these light-emitting diodes can optionally deliver photons of different wavelengths and/or different intensities.
  • these light-emitting diodes can optionally be mounted on a single movable support and/or be associated with at least one movable lens, so as to orient the photons that they generate along different chosen general directions in space.
  • a vehicle light unit includes a lighting device having the characteristics mentioned in the preceding sentence, it can provide a turn code function, a mechatronic-type light or a warning light, or even define a curvilinear beam of light.
  • the aforementioned movements in fact make it possible to obtain light distributions which are better adapted to the movements of the vehicle, for example according to its speed and/or the shape of the road and/or the presence of an obstacle, and/or that participate in style (or aesthetic) effects that can participate in a light signature.
  • the object of the invention is in particular to improve the situation.
  • the diversity of functionalities offered by the lighting device is significantly increased without increase congestion significantly.
  • the invention also proposes a vehicle optical unit, optionally of the automotive type, and comprising at least one lighting device of the type presented above.
  • the invention also proposes a vehicle, optionally of the automotive type, and comprising at least one optical unit of the type presented above.
  • the object of the invention is in particular to propose a lighting device DE comprising organic light-emitting diodes (or OLEDs (“Organic Light-Emitting Diodes”)) DOk and capable of supplying photons intended to illuminate and/or participate in a function signage and/or light signature.
  • a lighting device DE comprising organic light-emitting diodes (or OLEDs (“Organic Light-Emitting Diodes”)) DOk and capable of supplying photons intended to illuminate and/or participate in a function signage and/or light signature.
  • the lighting device DE is intended to form part of a vehicle optical unit, possibly of the automobile type.
  • this optical block can be a rear light.
  • a lighting device DE can be equipment independent of an optical unit. In this case, it has its own housing, and can, for example, be installed in different systems, devices or installations, both indoors and outdoors.
  • a lighting device DE can be part of any type of vehicle, land, sea (or river), or air, or any type of installation (including industrial), or any type of building.
  • the coordinate system (X, Y, Z) defines three directions of space which are perpendicular to each other (two by two).
  • a lighting device DE comprises at least two organic light-emitting diodes DOk, positioning means MPk, and control means MC.
  • Each organic light-emitting diode (or OLED) DOk comprises a reflective front face FV, contained in a plane which is perpendicular to a normal, and through which it emits photons when it is supplied with (electric) current. It is preferably non-flexible.
  • the organic light-emitting diodes DOk of a lighting device DE can be N ⁇ M in number, with N ⁇ 2 and M ⁇ 2, and can be arranged in the form of a matrix of N rows and M columns.
  • N is equal to 3
  • M is equal to 3
  • k takes values between 1 and 9.
  • the matrix can have a planar emission and reflection face defined by all the front faces FV.
  • the emission and reflection face of the matrix may have at least one curvature, possibly three-dimensional, resulting from different positionings of the positioning means MPk.
  • the positioning means MPk are suitable for orienting the organic light-emitting diodes DOk around first and second axes perpendicular to each other in order to orient their normals in space along first chosen directions. They are for example secured to a support SM which can be in the form of a substrate, optionally in CMOS (“Complementary Metal Oxide Semiconductor”) technology.
  • CMOS Complementary Metal Oxide Semiconductor
  • Such a substrate SM can, for example and as illustrated without limitation on the figure 1 and 2 , include at least part of the control means MC, arranged in the form of integrated electronic circuits. But these control means MC could be completely, or at least partially, remote, for example on a printed circuit board, possibly of the PCB (“Printed Circuit Board”) type, rigid or flexible (“Flex” type). Such an offset makes it possible to reduce the bulk of the assembly comprising the positioning means MPk, the organic light-emitting diodes DOk and the substrate SM.
  • PCB printed Circuit Board
  • Flexible flexible
  • the first axis is parallel to the Z direction (it allows rotations in the XY plane, materialized by the arrow F1)
  • the second axis is (here) parallel to the X direction (it allows rotations in the ZY plane, materialized by arrow F2).
  • the control means MC are suitable for controlling the positioning means MPk so that they orient the normals (of the front faces FV of the organic light-emitting diodes DOk) according to the first chosen directions.
  • these control means MC are also suitable for controlling the operation of the organic light-emitting diodes DOk so that they emit photons via their front face FV along the associated first chosen directions and/or reflect via their front face FV, following second chosen directions, photons which come from a light source SL.
  • each organic light-emitting diode DOk will either only emit photons, or only reflect photons, or even both emit photons and reflect photons from a light source SL.
  • the double control (orientation of the normals and operation of the OLEDs DOk) which is ensured at all times by the control means MC advantageously allows the lighting device DE to offer a wide variety of functionalities without increasing the significant congestion.
  • the increase in size results in fact from the presence of the positioning means MPk as well as possibly from the presence of the light source SL when it is part of the lighting device DE, which is not mandatory.
  • the source SL light can be part of another lighting device (here its optical unit) which also provides at least one other functionality.
  • This SL light source can be presented in different ways.
  • It provides photons with at least two different wavelengths, in a controllable way. Consequently, it can comprise one or more LEDs (possibly organic (or OLEDs)), one or more light guides (with their light source), one or more laser diodes, or one or more diffuse sources.
  • LEDs possibly organic (or OLEDs)
  • light guides with their light source
  • laser diodes or one or more diffuse sources.
  • the positioning means MPk can advantageously be capable of orienting the organic light-emitting diodes DOk independently of each other.
  • the orientation of each organic light-emitting diode DOk is controlled by the control means MC independently of the other organic light-emitting diodes DOk' (with k' ⁇ k), which does not prevent that at certain times all the normals are oriented along the same first chosen direction if a function requires it (as in the example of the figure 1 ). This makes it possible to further increase the diversity of functionalities offered by the lighting device DE.
  • all the front faces FV of the organic light-emitting diodes DOk have the same first orientation along a first chosen direction which is here parallel to the direction Z.
  • the front faces FV of the organic light-emitting diodes D01 to D03 have the same second orientation along a first selected direction inclined to the right with respect to the XY plane
  • the front faces FV of the organic light-emitting diodes D04 to D06 have the same third orientation along a another first chosen direction inclined to the left relative to the XY plane
  • the front faces FV of the organic light-emitting diodes D07 to D09 have the same first orientation in the first chosen direction (parallel to the Z direction).
  • the positioning means MPk can comprise micro-actuators in a number equal to the number of organic light-emitting diodes DOk and respectively associated with the latter (DOk).
  • each organic light-emitting diode DOk is associated with its own micro-actuator MPk responsible for the orientation in space of its normal.
  • micro-actuators MPk makes it possible to limit the increase in size that their presence causes.
  • each MPk micro-actuator may be of the type used in a digital micro-mirror device (or DMD “Digital Micro-mirror Device”)), well known to those skilled in the art. art.
  • each micro-actuator MPk can be of the piezoelectric type.
  • each micro-actuator MPk can, for example, comprise two precision step or linear micromotors, such as for example those which are manufactured by the company SONCEBOZ.
  • control means MC can be suitable for controlling the operation of the organic light-emitting diodes DOk independently of each other.
  • controlling the operation is understood here to mean controlling the current supply to an organic light-emitting diode DOk so that it emits, or does not emit, photons if a function so requires. This makes it possible to further increase the diversity of functionalities offered by the lighting device DE, and in particular to produce animations.
  • control means MC can be suitable for controlling the intensity of the photons emitted and/or of the photons reflected by each of the organic light-emitting diodes DOk.
  • the intensity of the photons emitted by an organic light-emitting diode DOk can, for example, be controlled by means of the current which supplies it.
  • the intensity of the photons reflected by an organic light-emitting diode DOk can, for example, be controlled by means of the current which supplies the light source SL. This makes it possible to further increase the diversity of functionalities offered by the lighting device DE, and in particular to produce animations.
  • control means MC can be suitable for controlling the wavelengths of the photons which come from the source of light SL so that the light resulting from the photons emitted and the photons reflected by each organic light-emitting diode DOk has a chosen color. It will indeed be understood that by controlling the proportions (or intensities) of photons of different wavelengths (for example in the green, the blue and the red), it is possible to control the color of the light coming from the front face of an organic light-emitting diode DOk.
  • organic light-emitting diodes DOk emitting photons of red wavelength and reflecting photons coming from the light source SL and having green and blue wavelengths. This can in particular make it possible to obtain any visible color, for example for the color display of different information or icons, or to define animations by variation of colors in a global or localized way, or even a personalization according to the tastes and/or needs of the users.
  • organic light-emitting diodes DOk can have the same shape (for example square or rectangular), or different shapes (in particular within different rows (or columns) of a matrix).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Electroluminescent Light Sources (AREA)

Description

L'invention concerne les dispositifs d'éclairage qui sont capables de fournir des photons.The invention relates to lighting devices which are capable of delivering photons.

Dans ce qui suit, on entend par « dispositif d'éclairage » un dispositif permettant d'éclairer et/ou de participer à une fonction de signalisation et/ou de signature lumineuse, que ce soit en intérieur ou en extérieur.In what follows, the term “lighting device” is understood to mean a device making it possible to illuminate and/or participate in a signaling and/or light signature function, whether indoors or outdoors.

Dans certains domaines techniques, comme par exemple et non limitativement celui des véhicules, éventuellement de type automobile, on utilise des dispositifs d'éclairage comprenant au moins une source de lumière à diodes électroluminescentes (ou LEDs), éventuellement de type organique (ou OLED (« Organic Light-Emitting Diode »)).In certain technical fields, such as for example and without limitation that of vehicles, optionally of the automotive type, lighting devices are used comprising at least one light emitting diode (or LED) light source, optionally of the organic type (or OLED ( "Organic Light-Emitting Diode")).

Selon les applications, ces diodes électroluminescentes peuvent éventuellement délivrer des photons de longueurs d'onde différentes et/ou des intensités différentes.Depending on the applications, these light-emitting diodes can optionally deliver photons of different wavelengths and/or different intensities.

Par ailleurs, selon les applications, ces diodes électroluminescentes peuvent éventuellement être montées sur un unique support déplaçable et/ou être associées à au moins une lentille déplaçable, de manière à orienter les photons qu'elles génèrent suivant différentes directions générales choisies de l'espace. Par exemple, lorsqu'un bloc optique de véhicule comprend un dispositif d'éclairage présentant les caractéristiques mentionnées dans la phrase précédente, il peut assurer une fonction de code de virage, de feu de type mécatronique ou de feu d'alerte, ou encore définir un faisceau lumineux curviligne. Les déplacements précités permettent en effet l'obtention de distributions lumineuses qui sont mieux adaptées aux mouvements du véhicule, par exemple en fonction de sa vitesse et/ou de la forme de la route et/ou de la présence d'obstacle, et/ou qui participent à des effets de style (ou esthétiques) qui peuvent participer à une signature lumineuse.Furthermore, depending on the applications, these light-emitting diodes can optionally be mounted on a single movable support and/or be associated with at least one movable lens, so as to orient the photons that they generate along different chosen general directions in space. . For example, when a vehicle light unit includes a lighting device having the characteristics mentioned in the preceding sentence, it can provide a turn code function, a mechatronic-type light or a warning light, or even define a curvilinear beam of light. The aforementioned movements in fact make it possible to obtain light distributions which are better adapted to the movements of the vehicle, for example according to its speed and/or the shape of the road and/or the presence of an obstacle, and/or that participate in style (or aesthetic) effects that can participate in a light signature.

On connait notamment du document US2005275562A un dispositif d'éclairage conforme au préambule de la revendication 1.We know in particular from the document US2005275562A a lighting device according to the preamble of claim 1.

Cependant, la diversité de fonctionnalités offerte par les dispositifs d'éclairage actuels demeure relativement limitée, et notamment ne permet pas de combiner ensemble certaines fonctions, ce qui contraint à utiliser en parallèle plusieurs dispositifs d'éclairage ou des éléments additionnels encombrants, ce qui n'est pas toujours possible.However, the diversity of functionalities offered by current lighting devices remains relatively limited, and in particular does not allow certain functions to be combined together, which means that several lighting devices or bulky additional elements have to be used in parallel, which is not always possible.

L'invention a notamment pour but d'améliorer la situation.The object of the invention is in particular to improve the situation.

Elle propose notamment à cet effet un dispositif conforme au préambule de la revendication 1. La présente invention est caractérisée par la partie caractérisante de la revendication 1.It proposes in particular for this purpose a device in accordance with the preamble of claim 1. The present invention is characterized by the characterizing part of claim 1.

Grâce à l'orientation dans l'espace des normales aux diodes électroluminescentes organiques combinée à la possibilité d'émettre et/ou de réfléchir des photons de façon contrôlée, on augmente notablement la diversité de fonctionnalités offerte par le dispositif d'éclairage sans pour autant augmenter l'encombrement de façon significative.Thanks to the orientation in space of the normals to the organic light-emitting diodes combined with the possibility of emitting and/or reflecting photons in a controlled manner, the diversity of functionalities offered by the lighting device is significantly increased without increase congestion significantly.

Le dispositif d'éclairage selon l'invention peut comporter d'autres caractéristiques qui peuvent être prises séparément ou en combinaison, et notamment :

  • ses moyens de positionnement peuvent être propres à orienter les diodes électroluminescentes organiques indépendamment les unes des autres ;
    ➢ ses moyens de positionnement peuvent comprendre des micro-actionneurs en nombre égal au nombre de diodes électroluminescentes organiques et associés respectivement à ces dernières ;
  • ses moyens de contrôle peuvent être propres à contrôler le fonctionnement des diodes électroluminescentes organiques indépendamment les unes des autres ;
  • ses diodes électroluminescentes organiques peuvent être au nombre de NxM, avec N ≥ 2 et M ≥ 2, et peuvent être agencées sous la forme d'une matrice de N lignes et M colonnes ;
  • ses moyens de contrôle peuvent être propres à contrôler l'intensité des photons émis et/ou des photons réfléchis par chacune des diodes électroluminescentes organiques ;
  • il comprend la source de lumière.
The lighting device according to the invention may comprise other characteristics which may be taken separately or in combination, and in particular:
  • its positioning means may be suitable for orienting the organic light-emitting diodes independently of each other;
    ➢ its positioning means may comprise micro-actuators in a number equal to the number of organic light-emitting diodes and associated respectively with the latter;
  • its control means may be suitable for controlling the operation of the organic light-emitting diodes independently of each other;
  • its organic light-emitting diodes can be N×M in number, with N≥2 and M≥2, and can be arranged in the form of a matrix of N rows and M columns;
  • its control means may be suitable for controlling the intensity of the photons emitted and/or of the photons reflected by each of the organic light-emitting diodes;
  • it includes the light source.

L'invention propose également un bloc optique de véhicule, éventuellement de type automobile, et comprenant au moins un dispositif d'éclairage du type de celui présenté ci-avant.The invention also proposes a vehicle optical unit, optionally of the automotive type, and comprising at least one lighting device of the type presented above.

L'invention propose également un véhicule, éventuellement de type automobile, et comprenant au moins un bloc optique du type de celui présenté ci-avant.The invention also proposes a vehicle, optionally of the automotive type, and comprising at least one optical unit of the type presented above.

D'autres caractéristiques et avantages de l'invention apparaîtront à l'examen de la description détaillée ci-après, et des dessins annexés, sur lesquels :

  • la figure 1 illustre schématiquement et fonctionnellement, dans une vue en perspective, un exemple de réalisation d'un dispositif d'éclairage selon l'invention avec ses diodes électroluminescentes organiques orientées selon un même angle, et
  • la figure 2 illustre schématiquement, dans une vue en perspective, le dispositif d'éclairage de la figure 1 avec ses diodes électroluminescentes organiques orientées selon différents angles.
Other characteristics and advantages of the invention will appear on examination of the detailed description below, and of the appended drawings, in which:
  • the figure 1 schematically and functionally illustrates, in a perspective view, an embodiment of a lighting device according to the invention with its organic light-emitting diodes oriented at the same angle, and
  • the picture 2 schematically illustrates, in a perspective view, the lighting device of the figure 1 with its organic light-emitting diodes oriented at different angles.

L'invention a notamment pour but de proposer un dispositif d'éclairage DE comprenant des diodes électroluminescentes organiques (ou OLEDs (« Organic Light-Emitting Diodes »)) DOk et capable de fournir des photons destinés à éclairer et/ou participer à une fonction de signalisation et/ou de signature lumineuse.The object of the invention is in particular to propose a lighting device DE comprising organic light-emitting diodes (or OLEDs (“Organic Light-Emitting Diodes”)) DOk and capable of supplying photons intended to illuminate and/or participate in a function signage and/or light signature.

Dans ce qui suit, on considère, à titre d'exemple non limitatif, que le dispositif d'éclairage DE est destiné à faire partie d'un bloc optique de véhicule, éventuellement de type automobile. Par exemple, ce bloc optique peut être un feu arrière. Mais l'invention n'est pas limitée à cette application. En effet, un dispositif d'éclairage DE, selon l'invention, peut être un équipement indépendant d'un bloc optique. Dans ce cas, il comporte son propre boîtier, et peut, par exemple, être installé dans différents systèmes, appareils ou installations, en intérieur comme en extérieur.In what follows, it is considered, by way of non-limiting example, that the lighting device DE is intended to form part of a vehicle optical unit, possibly of the automobile type. For example, this optical block can be a rear light. But the invention is not limited to this application. Indeed, a lighting device DE, according to the invention, can be equipment independent of an optical unit. In this case, it has its own housing, and can, for example, be installed in different systems, devices or installations, both indoors and outdoors.

D'une manière générale, un dispositif d'éclairage DE, selon l'invention, peut faire partie de n'importe quel type de véhicule, terrestre, maritime (ou fluvial), ou aérien, ou de n'importe quel type d'installation (y compris industrielle), ou encore de n'importe quel type de bâtiment.In general, a lighting device DE, according to the invention, can be part of any type of vehicle, land, sea (or river), or air, or any type of installation (including industrial), or any type of building.

On a schématiquement et fonctionnellement représenté sur les figures 1 et 2 un exemple de réalisation non limitatif d'un dispositif d'éclairage DE selon l'invention.We have schematically and functionally represented on the figure 1 and 2 a non-limiting exemplary embodiment of a DE lighting device according to the invention.

Sur ces figures 1 et 2, le repère (X, Y, Z) définit trois directions de l'espace qui sont perpendiculaires entre elles (deux à deux).On these figure 1 and 2 , the coordinate system (X, Y, Z) defines three directions of space which are perpendicular to each other (two by two).

Comme cela est illustré sur les figures 1 et 2, un dispositif d'éclairage DE, selon l'invention, comprend au moins deux diodes électroluminescentes organiques DOk, des moyens de positionnement MPk, et des moyens de contrôle MC.As illustrated in the figure 1 and 2 , a lighting device DE, according to the invention, comprises at least two organic light-emitting diodes DOk, positioning means MPk, and control means MC.

Chaque diode électroluminescente organique (ou OLED) DOk comprend une face avant FV réfléchissante, contenue dans un plan qui est perpendiculaire à une normale, et par laquelle elle émet des photons lorsqu'elle est alimentée en courant (électrique). Elle est préférentiellement non flexible.Each organic light-emitting diode (or OLED) DOk comprises a reflective front face FV, contained in a plane which is perpendicular to a normal, and through which it emits photons when it is supplied with (electric) current. It is preferably non-flexible.

On notera, comme illustré non limitativement sur les figures 1 et 2, que les diodes électroluminescentes organiques DOk d'un dispositif d'éclairage DE peuvent être au nombre de NxM, avec N ≥ 2 et M ≥ 2, et peuvent être agencées sous la forme d'une matrice de N lignes et M colonnes. Dans l'exemple illustré, N est égal à 3 et M est égal à 3, et par conséquent k prend des valeurs comprises entre 1 et 9. Lorsque toutes les diodes électroluminescentes organiques DOk sont dans une même orientation initiale (comme dans la figure 1), la matrice peut avoir une face d'émission et de réflexion planaire définie par toutes les faces avant FV. Mais dans une variante de réalisation, la face d'émission et de réflexion de la matrice peut présenter au moins une courbure, éventuellement tridimensionnelle, résultant de positionnements différents des moyens de positionnement MPk.It will be noted, as illustrated without limitation on the figure 1 and 2 , that the organic light-emitting diodes DOk of a lighting device DE can be N×M in number, with N≥2 and M≥2, and can be arranged in the form of a matrix of N rows and M columns. In the example shown, N is equal to 3 and M is equal to 3, and therefore k takes values between 1 and 9. When all the organic light-emitting diodes DOk are in the same initial orientation (as in the figure 1 ), the matrix can have a planar emission and reflection face defined by all the front faces FV. But in a variant embodiment, the emission and reflection face of the matrix may have at least one curvature, possibly three-dimensional, resulting from different positionings of the positioning means MPk.

Les moyens de positionnement MPk sont propres à orienter les diodes électroluminescentes organiques DOk autour de premier et second axes perpendiculaires entre eux afin d'orienter leurs normales dans l'espace selon des premières directions choisies. Ils sont par exemple solidarisés à un support SM qui peut se présenter sous la forme d'un substrat, éventuellement en technologie CMOS (« Complementary Metal Oxide Semiconductor »).The positioning means MPk are suitable for orienting the organic light-emitting diodes DOk around first and second axes perpendicular to each other in order to orient their normals in space along first chosen directions. They are for example secured to a support SM which can be in the form of a substrate, optionally in CMOS (“Complementary Metal Oxide Semiconductor”) technology.

Un tel substrat SM peut, par exemple et comme illustré non limitativement sur les figures 1 et 2, comprendre une partie au moins des moyens de contrôle MC, agencée sous la forme de circuits électroniques intégrés. Mais ces moyens de contrôle MC pourraient être totalement, ou au moins partiellement, déportés, par exemple sur une carte à circuits imprimés, éventuellement de type PCB (« Printed Circuit Board »), rigide ou flexible (« de type « Flex »). Un tel déport permet de réduire l'encombrement de l'ensemble comprenant les moyens de positionnement MPk, les diodes électroluminescentes organiques DOk et le substrat SM.Such a substrate SM can, for example and as illustrated without limitation on the figure 1 and 2 , include at least part of the control means MC, arranged in the form of integrated electronic circuits. But these control means MC could be completely, or at least partially, remote, for example on a printed circuit board, possibly of the PCB (“Printed Circuit Board”) type, rigid or flexible (“Flex” type). Such an offset makes it possible to reduce the bulk of the assembly comprising the positioning means MPk, the organic light-emitting diodes DOk and the substrate SM.

Sur la figure 1 le premier axe est parallèle à la direction Z (il permet des rotations dans le plan XY, matérialisées par la flèche F1), et le second axe est (ici) parallèle à la direction X (il permet des rotations dans le plan ZY, matérialisées par la flèche F2).On the figure 1 the first axis is parallel to the Z direction (it allows rotations in the XY plane, materialized by the arrow F1), and the second axis is (here) parallel to the X direction (it allows rotations in the ZY plane, materialized by arrow F2).

Les moyens de contrôle MC sont propres à contrôler les moyens de positionnement MPk pour qu'ils orientent les normales (des faces avant FV des diodes électroluminescentes organiques DOk) selon les premières directions choisies. De plus, ces moyens de contrôle MC sont également propres à contrôler le fonctionnement des diodes électroluminescentes organiques DOk pour qu'elles émettent des photons par leur face avant FV suivant les premières directions choisies associées et/ou réfléchissent par leur face avant FV, suivant des secondes directions choisies, des photons qui sont issus d'une source de lumière SL.The control means MC are suitable for controlling the positioning means MPk so that they orient the normals (of the front faces FV of the organic light-emitting diodes DOk) according to the first chosen directions. In addition, these control means MC are also suitable for controlling the operation of the organic light-emitting diodes DOk so that they emit photons via their front face FV along the associated first chosen directions and/or reflect via their front face FV, following second chosen directions, photons which come from a light source SL.

L'expression « et/ou » signifie ici que selon les besoins fonctionnels à l'instant considéré chaque diode électroluminescente organique DOk va soit seulement émettre des photons, soit seulement réfléchir des photons, soit encore à la fois émettre des photons et réfléchir des photons issus d'une source de lumière SL.The expression “and/or” means here that, depending on the functional needs at the moment in question, each organic light-emitting diode DOk will either only emit photons, or only reflect photons, or even both emit photons and reflect photons from a light source SL.

On comprendra que le double contrôle (orientation des normales et fonctionnement des OLEDs DOk) qui est assuré à chaque instant par les moyens de contrôle MC permet avantageusement au dispositif d'éclairage DE d'offrir une grande diversité de fonctionnalités sans pour autant augmenter l'encombrement de façon significative. L'augmentation de l'encombrement résulte en effet de la présence des moyens de positionnement MPk ainsi qu'éventuellement de la présence de la source de lumière SL lorsqu'elle fait partie du dispositif d'éclairage DE, ce qui n'est pas obligatoire. En effet, la source de lumière SL peut faire partie d'un autre dispositif d'éclairage (ici de son bloc optique) qui assure par ailleurs au moins une autre fonctionnalité.It will be understood that the double control (orientation of the normals and operation of the OLEDs DOk) which is ensured at all times by the control means MC advantageously allows the lighting device DE to offer a wide variety of functionalities without increasing the significant congestion. The increase in size results in fact from the presence of the positioning means MPk as well as possibly from the presence of the light source SL when it is part of the lighting device DE, which is not mandatory. . Indeed, the source SL light can be part of another lighting device (here its optical unit) which also provides at least one other functionality.

Cette source de lumière SL peut se présenter de différentes manières.This SL light source can be presented in different ways.

Elle fournit des photons présentant au moins deux longueurs d'onde différentes, de façon contrôlable. Par conséquent, elle peut comprendre une ou plusieurs LEDs (éventuellement organiques (ou OLEDs)), un ou plusieurs guides de lumière (avec leur source de lumière), une ou plusieurs diodes laser, ou une ou plusieurs sources diffuses.It provides photons with at least two different wavelengths, in a controllable way. Consequently, it can comprise one or more LEDs (possibly organic (or OLEDs)), one or more light guides (with their light source), one or more laser diodes, or one or more diffuse sources.

On notera que les moyens de positionnement MPk peuvent être avantageusement propres à orienter les diodes électroluminescentes organiques DOk indépendamment les unes des autres. Dans ce cas, l'orientation de chaque diode électroluminescente organique DOk est contrôlée par les moyens de contrôle MC de façon indépendante des autres diodes électroluminescentes organiques DOk' (avec k' ≠ k), ce qui n'empêche pas qu'à certains moments toutes les normales soient orientées suivant une même première direction choisie si une fonction le requiert (comme dans l'exemple de la figure 1). Cela permet d'augmenter encore plus la diversité de fonctionnalités offerte par le dispositif d'éclairage DE.It will be noted that the positioning means MPk can advantageously be capable of orienting the organic light-emitting diodes DOk independently of each other. In this case, the orientation of each organic light-emitting diode DOk is controlled by the control means MC independently of the other organic light-emitting diodes DOk' (with k' ≠ k), which does not prevent that at certain times all the normals are oriented along the same first chosen direction if a function requires it (as in the example of the figure 1 ). This makes it possible to further increase the diversity of functionalities offered by the lighting device DE.

Dans l'exemple de la figure 1, toutes les faces avant FV des diodes électroluminescentes organiques DOk présentent une même première orientation suivant une première direction choisie qui est ici parallèle à la direction Z. Dans l'exemple de la figure 2, les faces avant FV des diodes électroluminescentes organiques D01 à D03 présentent une même deuxième orientation suivant une première direction choisie inclinée vers la droite par rapport au plan XY, les faces avant FV des diodes électroluminescentes organiques D04 à D06 présentent une même troisième orientation suivant une autre première direction choisie inclinée vers la gauche par rapport au plan XY, et les faces avant FV des diodes électroluminescentes organiques D07 à D09 présentent une même première orientation suivant la première direction choisie (parallèle à la direction Z).In the example of the figure 1 , all the front faces FV of the organic light-emitting diodes DOk have the same first orientation along a first chosen direction which is here parallel to the direction Z. In the example of the figure 2 , the front faces FV of the organic light-emitting diodes D01 to D03 have the same second orientation along a first selected direction inclined to the right with respect to the XY plane, the front faces FV of the organic light-emitting diodes D04 to D06 have the same third orientation along a another first chosen direction inclined to the left relative to the XY plane, and the front faces FV of the organic light-emitting diodes D07 to D09 have the same first orientation in the first chosen direction (parallel to the Z direction).

En présence de la dernière option, les moyens de positionnement MPk peuvent comprendre des micro-actionneurs en nombre égal au nombre de diodes électroluminescentes organiques DOk et associés respectivement à ces dernières (DOk). En d'autres termes, chaque diode électroluminescente organique DOk est associée à son propre micro-actionneur MPk chargé de l'orientation dans l'espace de sa normale. L'utilisation de tels micro-actionneurs MPk permet de limiter l'augmentation d'encombrement que leur présence occasionne.In the presence of the last option, the positioning means MPk can comprise micro-actuators in a number equal to the number of organic light-emitting diodes DOk and respectively associated with the latter (DOk). In other words, each organic light-emitting diode DOk is associated with its own micro-actuator MPk responsible for the orientation in space of its normal. The use of such micro-actuators MPk makes it possible to limit the increase in size that their presence causes.

A titre d'exemple purement illustratif, chaque micro-actionneur MPk peut être du type de ceux qui sont utilisés dans un dispositif à micro-miroirs numérique (ou DMD « Digital Micro-mirror Device »)), bien connu de l'homme de l'art.By way of purely illustrative example, each MPk micro-actuator may be of the type used in a digital micro-mirror device (or DMD "Digital Micro-mirror Device")), well known to those skilled in the art. art.

Par exemple, les micro-actionneurs MPk peuvent être de type piézoélectrique. En variante, chaque micro-actionneur MPk peut, par exemple, comporter deux micromoteurs à pas ou linéaires, de précision, comme par exemple ceux qui sont fabriqués par la société SONCEBOZ.For example, the MPk micro-actuators can be of the piezoelectric type. As a variant, each micro-actuator MPk can, for example, comprise two precision step or linear micromotors, such as for example those which are manufactured by the company SONCEBOZ.

On notera également que les moyens de contrôle MC peuvent être propres à contrôler le fonctionnement des diodes électroluminescentes organiques DOk indépendamment les unes des autres. On entend ici par « contrôler le fonctionnement » le fait de contrôler l'alimentation en courant d'une diode électroluminescente organique DOk afin qu'elle émette, ou n'émette pas, de photons si une fonction le requiert. Cela permet d'augmenter encore plus la diversité de fonctionnalités offerte par le dispositif d'éclairage DE, et notamment de réaliser des animations.It will also be noted that the control means MC can be suitable for controlling the operation of the organic light-emitting diodes DOk independently of each other. The term “controlling the operation” is understood here to mean controlling the current supply to an organic light-emitting diode DOk so that it emits, or does not emit, photons if a function so requires. This makes it possible to further increase the diversity of functionalities offered by the lighting device DE, and in particular to produce animations.

On notera également que les moyens de contrôle MC peuvent être propres à contrôler l'intensité des photons émis et/ou des photons réfléchis par chacune des diodes électroluminescentes organiques DOk. L'intensité des photons émis par une diode électroluminescente organique DOk peut, par exemple, être contrôlée au moyen du courant qui l'alimente. L'intensité des photons réfléchis par une diode électroluminescente organique DOk peut, par exemple, être contrôlée au moyen du courant qui alimente la source de lumière SL. Cela permet d'augmenter encore plus la diversité de fonctionnalités offerte par le dispositif d'éclairage DE, et notamment de réaliser des animations.It will also be noted that the control means MC can be suitable for controlling the intensity of the photons emitted and/or of the photons reflected by each of the organic light-emitting diodes DOk. The intensity of the photons emitted by an organic light-emitting diode DOk can, for example, be controlled by means of the current which supplies it. The intensity of the photons reflected by an organic light-emitting diode DOk can, for example, be controlled by means of the current which supplies the light source SL. This makes it possible to further increase the diversity of functionalities offered by the lighting device DE, and in particular to produce animations.

On notera également que les moyens de contrôle MC peuvent être propres à contrôler les longueurs d'onde des photons qui sont issus de la source de lumière SL de sorte que la lumière résultant des photons émis et des photons réfléchis par chaque diode électroluminescente organique DOk présente une couleur choisie. On comprendra en effet qu'en contrôlant les proportions (ou intensités) de photons de longueurs d'onde différentes (par exemple dans le vert, le bleu et le rouge), on peut contrôler la couleur de la lumière provenant de la face avant d'une diode électroluminescente organique DOk.It will also be noted that the control means MC can be suitable for controlling the wavelengths of the photons which come from the source of light SL so that the light resulting from the photons emitted and the photons reflected by each organic light-emitting diode DOk has a chosen color. It will indeed be understood that by controlling the proportions (or intensities) of photons of different wavelengths (for example in the green, the blue and the red), it is possible to control the color of the light coming from the front face of an organic light-emitting diode DOk.

Ainsi, on peut utiliser des diodes électroluminescentes organiques DOk émettant des photons de longueur d'onde rouge et réfléchissant des photons issus de la source de lumière SL et présentant des longueurs d'onde verte et bleu. Cela peut notamment permettre d'obtenir n'importe quelle couleur visible, par exemple pour l'affichage en couleur d'informations ou d'icônes différentes, ou de définir des animations par variation de couleurs de façon globale ou localisée, ou encore une personnalisation en fonction des goûts et/ou des besoins des utilisateurs.Thus, it is possible to use organic light-emitting diodes DOk emitting photons of red wavelength and reflecting photons coming from the light source SL and having green and blue wavelengths. This can in particular make it possible to obtain any visible color, for example for the color display of different information or icons, or to define animations by variation of colors in a global or localized way, or even a personalization according to the tastes and/or needs of the users.

On notera également que les diodes électroluminescentes organiques DOk peuvent présenter une même forme (par exemple carrée ou rectangulaire), ou différentes formes (notamment au sein de rangées (ou colonnes) différentes d'une matrice).It will also be noted that the organic light-emitting diodes DOk can have the same shape (for example square or rectangular), or different shapes (in particular within different rows (or columns) of a matrix).

L'invention offre plusieurs avantages, parmi lesquels :

  • une optimisation des distributions lumineuses sans changement des alimentations électriques et de puissance,
  • des animation de style, éventuellement avec des couleurs variables,
  • des changements d'aspect, par exemple pour une situation d'urgence,
  • de nombreuses possibilités de personnalisation.
The invention offers several advantages, including:
  • optimization of light distribution without changing electrical and power supplies,
  • style animations, possibly with variable colors,
  • changes in appearance, for example for an emergency situation,
  • many customization options.

Claims (8)

  1. Lighting device (DE) suitable for supplying photons comprising a light source (SL) and comprising i) at least two organic light-emitting diodes (DOk) comprising a reflective front face (FV) and contained in a plane perpendicular to a normal ii) positioning means (MPk) suitable for orienting said organic light-emitting diodes (DOk) about two perpendicular axes in order to orient their normals in space along first selected directions, and iii) control means (MC) suitable for controlling, on the one hand, said positioning means (MPk) so that they orient said normals along said first selected directions and, on the other hand, the operation of said organic light-emitting diodes (DOk) so that they emit photons through their front face (FV) in said first chosen directions and/or reflect through their front face (FV), in second chosen directions, photons from said light source (SL), characterized in that said control means (MC) are adapted to control the wavelengths of the photons coming from said light source (SL) so that the light resulting from the photons emitted and the photons reflected by each organic light-emitting diode (DOk) has a selected color.
  2. The device according to claim 1, characterized in that said positioning means (MPk) are adapted to orient said organic light emitting diodes (DOk) independently from each other.
  3. Device according to claim 2, characterized in that said positioning means (MPk) comprise micro-actuators in a number equal to the number of organic light-emitting diodes (DOk) and associated respectively with the latter (DOk).
  4. Device according to one of the claims 1 to 3, characterized in that said control means (MC) are able to control the operation of said organic light-emitting diodes (DOk) independently from each other.
  5. Device according to one of claims 1 to 4, characterized in that said organic light-emitting diodes (DOk) are NxM in number, with N ≥ 2 and M ≥ 2, and are arranged in the form of a matrix of N rows and M columns.
  6. Device according to one of claims 1 to 5, characterized in that said control means (MC) are suitable for controlling the intensity of the photons emitted and/or the photons reflected by each of said organic light-emitting diodes (DOk).
  7. Vehicle optical block, characterized in that it comprises at least one lighting device (DE) according to one of the preceding claims.
  8. Vehicle, characterized in that it comprises at least one optical block according to claim 7.
EP17797699.0A 2016-11-17 2017-10-24 Lighting device with directable and photon-emitting and/or reflecting oleds Not-in-force EP3542102B1 (en)

Applications Claiming Priority (2)

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FR1661124A FR3058777B1 (en) 2016-11-17 2016-11-17 LIGHTING DEVICE WITH ORIENTABLE AND TRANSMITTING AND / OR PHOTON-REFLECTIVE OLED LIGHTS
PCT/FR2017/052922 WO2018091793A1 (en) 2016-11-17 2017-10-24 Lighting device with directable and photon-emitting and/or reflecting oleds

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JP7469861B2 (en) * 2019-09-02 2024-04-17 株式会社小糸製作所 Lighting unit
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DE19737653A1 (en) * 1997-08-29 1999-03-04 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lighting device for vehicles and operating method for such a lighting device
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US7638941B2 (en) * 2005-12-02 2009-12-29 Eastman Kodak Company Lamp with multi-colored OLED elements
DE102008051591A1 (en) * 2008-10-14 2010-04-15 Bayerische Motoren Werke Aktiengesellschaft Method for controlling visibility of e.g. motor vehicle, involves determining light distribution of light source, and controlling set of parameters for outlook of observation position depending on preset criteria
DE102010028949A1 (en) * 2010-05-12 2011-11-17 Osram Gesellschaft mit beschränkter Haftung headlight module
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FR3058777A1 (en) 2018-05-18
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CN109996992B (en) 2020-11-24
FR3058777B1 (en) 2018-12-07

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