• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An organic electroluminescence diode (8) includes a first generally extended electrode (18); a second generally extended electrode (20) disposed opposite the first electrode, the second electrode comprising at least two portions (201, 202) electrically isolated from each other; at least one organic emitting layer disposed between the first and second electrodes (18, 20); and electrical connection areas (22, 26, 30) of the first and second electrodes (18, 20). The electrical connection areas (22, 26, 30) of the first and second electrodes are located at an edge (83) of the diode (8).
    公开号:FR3025942A1
    申请号:FR1458666
    申请日:2014-09-15
    公开日:2016-03-18
    发明作者:Hui Jin；David Hue；Christophe Dubosc
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to the field of lighting and / or light signaling, in particular for a motor vehicle. More specifically, the invention relates to the field of lighting and light signaling by means of electroluminescence diodes (LEDs) and organic electroluminescence diodes (OLEDs). An OLED diode consists of a superposition of several organic semiconductor layers between two electrodes, one of which is transparent. The transparent electrode is usually made of indium tin oxide (also known by the acronym ITO for Indium tin oxide). The main feature of indium tin oxide is its combination of electrical conductivity and optical transparency. However, a compromise must be reached during the deposition of films, the increase in the concentration of charge carriers inducing an increase in conductivity of the material, but also a loss of its transparency. In other words, an ITO electrode with a good level of transparency has a limited conductivity. Published patent document WO 2009/101579 A1 discloses a light module comprising an OLED surface light source and an optical device. The OLED light source is segmented so as to be able to modulate the light beam produced. For this purpose, it comprises an anode divided into two portions electrically independent of one another, and a common cathode, an organic electroluminescent layer being disposed between the anode and the cathode. The electrical connections of the two portions of the anode and the cathode are at different locations of the module, specifically at opposite edges. The module is indeed intended to serve as a lighting module to mount on 25 or in a wall. In this case, the back of the module is in principle accessible to connect the power supply. Such a solution, however, is not favorable to a projecting mounting of a module support or a reduction in the thickness of the module. DE 20 2014 101 538 U discloses a light module, in particular for a motor vehicle, comprising a surface light source of the OLED type. This light source is divided into several zones that can be activated independently of one another. To do this, the surface diode consists of an electrode stack, with an organic electroluminescent layer between each pair of adjacent electrodes. Each pair of adjacent electrodes can thus serve as anode and cathode for the activation of the organic electroluminescent layer disposed between this pair of electrodes. This OLED diode construction is interesting in that it makes it possible to produce several emission colors, depending on the choice of organic electroluminescent layer materials. It is however penalizing by its production cost as well as by the potential losses of light produced by each pair of electrodes through the other layers. This teaching also does not seem to address the issue of electrical connection of electrodes for their food. The published patent document US 2014/0056020 A1 discloses a light module for a motor vehicle, comprising a series of surface light sources of the OLED type. These OLED diodes are arranged in a circular manner. With reference to FIG. 4 and paragraphs [0034] and [0035] of this document, a generally extended light module may comprise several, in this case two OLED diodes that can be activated independently of one another. Each of these OLED diodes can also be divided into several portions or segments. This teaching, however, does not further detail the splitting of an OLED diode into several segments. The object of the invention is to propose a surface light source of the OLED type which overcomes at least one of the drawbacks of the state of the art mentioned above. More particularly, the object of the invention is to propose a surface light source of the OLED type capable of providing several light functions under favorable conditions, in particular from an optical point of view, from a mounting point of view on a support and / or or from a point of view of the bulk according to the thickness. The subject of the invention is an organic electroluminescence diode comprising: a first generally extended electrode; a second generally extended electrode disposed opposite the first electrode, the second electrode comprising at least two electrically insulated portions of each other; at least one emitting organic layer disposed between the first and second electrodes; areas of electrical connection of the first and second electrodes; several edges; remarkable in that the electrical connection areas of the first and second electrodes are located on at least one of the edges of the diode.
    [0002] Advantageously, the electrical connection areas are for the power supply to the diode so that at least a portion of the diode emits light when the diode is energized. Advantageously, the electrical connection zones are located on only one of the edges of the diode.
    [0003] According to an advantageous embodiment of the invention, the first electrode is electrically connected to at least two distinct connection zones. According to an advantageous embodiment of the invention, at least one of the portions of the second electrode is electrically connected to at least two distinct connection zones.
    [0004] According to an advantageous embodiment of the invention, the first electrode, or the portion, or each of the portions, of the second electrode electrically connected to at least two distinct connection zones, is connected to its connection zones for positions on said electrode or portion which are spaced from each other by at least a quarter, preferably one-half, of the maximum extent of said electrode or portion. According to an advantageous embodiment of the invention, at least one of the portions of the second electrode bypasses the other portion, or one of the other portions, from the edge or at least one of the edges comprising the electrical connection zones. According to an advantageous embodiment of the invention, the portion, or each of the portions, of the second electrode which bypasses the other portion or one of the other portions from the edge comprising the electrical connection zones is electrically connected to two connection zones. distinct disposed at said edge on either side of at least one connection zone electrically connected to the other or one of the other portions it bypasses.
    [0005] Optionally, at least one of the portions, or even each portion, of the second electrode is electrically connected to at least two distinct connection regions arranged on two distinct or even opposite edges of the diode. Where appropriate, said portion may extend all along the diode. In this case, the portions of the second electrode form adjacent electrode strips. According to an advantageous embodiment of the invention, the first electrode and / or at least one of the portions of the second electrode comprises an electrical conductor extending along said electrode or electrode portion, said conductor being made of a distinct material and better electrical conductor than the main material of said electrode or electrode portion. According to an advantageous embodiment of the invention, the electrical conductor of the first electrode and / or the portion or portions of the second electrode extends to the zone (s) of electrical connection of said electrode or electrode portion 15. According to an advantageous embodiment of the invention, the electrical conductor or each of the electrical conductors has an average width of less than 10 mm. According to an advantageous embodiment of the invention, the material of the electrical conductor or conductors is indium tin oxide (ITO) or aluminum or calcium.
    [0006] According to an advantageous embodiment of the invention, the electrical conductor of the first electrode and / or the portion or portions of the second electrode extends along a contour of said electrode or electrode portion. According to an advantageous embodiment of the invention, the first electrode is reflective and / or the second electrode is transparent.
    [0007] According to an advantageous embodiment of the invention, the second electrode consists of indium-tin oxide. According to an advantageous embodiment of the invention, the electrical contact zones are located, preferably exclusively, in the extent of the diode on one of its two main faces.
    [0008] The invention also relates to a light module, in particular for a motor vehicle, comprising: a light source carrier (s); at least one surface light source of the organic electroluminescence diode type on the support, capable of emitting a light beam oriented substantially along an optical axis of said module; remarkable in that the surface light source or sources are in accordance with the invention, the light beam being adjustable by selective activation of the portions of the second electrode. The surface light source may be arranged so that the light beam performs a first photometric function, for example a position light, when activating a single first portion of the second electrode. The surface light source may be arranged so that the light beam performs a second photometric function, for example a flashing light, when activating a single second portion of the second electrode. Optionally, the surface light source may be arranged so that the light beam performs a third photometric function, for example a stop light, during the activation of all the portions of the second electrode. According to an advantageous embodiment of the invention, the surface light source or sources extending transversely to the optical axis of the module. According to an advantageous embodiment of the invention, the surface light source (s) 20 form an angle α with a direction perpendicular to the optical axis which is less than 30 °, preferably 25 °, more preferably 20 °. According to an advantageous embodiment of the invention, the angle a is greater than 3 °, preferably 5 °, more preferably 8 °. According to an advantageous embodiment of the invention, the light beam emitted by the surface light source (s) is a first beam, the module comprising one or more additional light sources able to illuminate the surface light source (s) and to form a second beam. illuminated by reflection on said surface light sources. According to an advantageous embodiment of the invention, the module comprises an optical device, preferably a collimator, capable of deflecting the light rays emitted by the additional light source (s) in a main direction, said deflected rays meeting the source (s). luminous surfaces with a non-zero angle of incidence. According to an advantageous embodiment of the invention, the first beam corresponds to a position signaling function for a motor vehicle and / or the second beam corresponds to a brake signaling function for a motor vehicle. The measures of the invention are interesting in that they promote the mounting of the light source projecting from a support. They are also interesting in that they promote luminous homogeneity by offsetting the ohm losses along the electrodes. The light source can thus be used as a light beam emitter as well as a reflector. Other features and advantages of the present invention will be better understood from the description and drawings in which: FIG. 1 is a perspective view of a light module in accordance with the invention; FIG. 2 is a front view of one of the two surface light sources of the OLED type of the module of FIG. 1; FIG. 3 is an exploded perspective view of the OLED surface light source of FIG. 2; FIG. 4 is a front view of the OLED surface light source of FIG. 2, illustrating the areas of electrical contact; FIG. 5 is a side view of the module of FIG. 1, illustrating the dual function of surface light sources of the OLED type. FIG. 1 illustrates a light-signaling module for a motor vehicle.
    [0009] The module 2 is configured to be housed in a housing disposed at the rear of the vehicle. It is configured to provide a lantern (or taillight) function, a stop lamp function and a direction indicator (or flashing) function. The module 2 comprises a substrate 4 and a part 6 attached to the substrate. The insert 6 can be attached to the substrate by means of screws. The substrate 4 comprises essentially a central portion 41, two side walls 42, two end walls 43 projecting from the side walls 42. The two side walls 42 form a cavity housing light sources (not visible) and a collimator 10 for forming a light beam for a direction indicator function. The insert 6 comprises two supports 61 and a rear portion 62. The supports 61 are arranged to protrude from the central portion 41 of the substrate 4 substantially opposite to each other. Each of these supports 61 supports a surface diode of OLED type 8. An OLED is a light emitting diode comprising a superposition of several organic semiconductor layers between two electrodes of which at least one is transparent. In this case, these OLED diodes provide a lantern function. The rear portion 62 of the insert 6 is configured to house a power supply connector 14.
    [0010] The substrate 4 of the module 2 also supports one or more light sources (not visible) between the side walls 42 and the OLED diodes 8, this or these light sources being covered with a collimator 12 in order to provide a light function. stop. More specifically, the rays emitted by these light sources and deflected by the collimator 12 to meet the front face of the corresponding OLED diode 20 and be reflected thereon to the front of the module. The longitudinal axis of the module shown in FIGS. 1 and 2 corresponds to its optical axis. This means that the different light beams produced by the module 2 are oriented substantially along this axis. All these beams are preferably directed towards the front of the module (corresponding to the right in FIG. 1 and at the rear of the vehicle). The collimators 10 and 12 are parts made of transparent or translucent material, such as glass or polycarbonate (PC) or polymethyl methacrylate (PMMA). They include inlet and / or outlet surfaces oriented to deflect the spokes along a principal direction, in application of the Snell-Descartes refractive principle. The input and output faces each form a diopter, namely a surface separating two transparent homogeneous and isotropic media of different refractive indices. The refractive index of the air is in fact of the order of 1 while that of the glass and polycarbonate is between about 1.4 and 1.6. The operating principle of a collimator is well known to those skilled in the art; it is therefore not necessary to detail it further.
    [0011] FIG. 2 illustrates an exemplary OLED surface diode for the module of FIG. 1. It can be seen that the diode 8 is split into two illuminating zones, namely a first zone 81 and a second zone 82. Each of these zones can be electrically activated independently. Still in FIG. 2, the diode 8 comprises an edge 83 intended to ensure the fixing and the electrical connection of the diode to the support of the light module of FIG. 1. FIG. 3 is a perspective and exploded illustration of the OLED surface diode. 8 of Figure 2. It can be seen that the diode 8 comprises two outer layers 16 for protecting it from the outside. These layers are transparent and can be in particular glass. The diode 8 also comprises a first electrode 18 intended to be connected to a negative potential that may correspond to the mass of a vehicle (if mounted on a vehicle). This first electrode is commonly called a cathode. It can be seen that this electrode 18 extends over the majority of the diode 8. The latter also comprises a second electrode 20 which is divided into several portions, in this case into two portions 201 and 202. The portion 201 corresponds to a central portion while the portion 202 bypasses the central portion 201. The portions 201 and 202 correspond in fact, respectively, to the first and second zones 81 and 82 of the diode 8 as shown in Figure 2. The second electrode 20, in this case its two portions 201 and 202, are intended to be brought to a positive potential so as to form an electric field with the first electrode. The second electrode is commonly called anode. In the assembled state of the diode, the two anodes 201 and 202 are substantially coplanar, or at least aligned according to the extent of the diode in the case where the diode is not flat.
    [0012] It should be mentioned that for the sake of clarity of presentation, the organic electroluminescent layers are not shown. These layers are in fact present between the two electrodes. The cathode can be made of calcium or aluminum, especially when it is reflective. The anodes are transparent and can be made of indium tin oxide (also known by the acronym ITO for Indium tin oxide). This material is known to have a transparency which is inversely proportional to its conductivity. FIG. 4 is a front view of the diode 8 of FIGS. 2 and 3, illustrating by transparency the electrical connection zones of the cathode and the anodes. It can be seen that the electrical connection areas are located on the mounting edge 83 of the diode 8. The cathode or first electrode 18 is not directly visible insofar as it is hidden by the second electrode 20 (201 and 202 ) which is superimposed on it. The cathode 18 is electrically connected to the two electrical connection zones 22 located at the ends of the edge 83. More particularly, an electrical conductor 24 is directly electrically connected to the connection zones 22 and extends along the periphery of the cathode 18. to ensure optimum electrical distribution. The cathode material may indeed have limited electrical conductivity, so that the presence of the conductor along its periphery is useful to ensure a constant potential across the electrode. The electrical conductor is then preferably made of a metallic material capable of ensuring optimum electrical conduction. The first anode 201 is electrically connected to the connection zone 30 which is, in this case, located substantially in the center of the edge 83 of the diode.
    [0013] Similarly to the cathode, an electrical conductor 32 in the form of a metal track may extend along the periphery of the first anode 201 and be directly connected to the connection zone 30. The second anode 202 is electrically connected to the two connection areas 26 which are, in this case, located on either side of the connection zone 30.
    [0014] Similarly to the cathode and the first anode, an electrical conductor 28 in the form of a metal track may extend along the periphery of the second anode 202 and be directly connected to the two connection areas 26.
    [0015] As already mentioned above, the material of the anodes must, on the one hand, be transparent and, on the other hand, be conductive. The layer or layers constituting the anodes must / must remain sufficiently thin (s) to remain transparent (s) and, therefore, have a certain resistivity which is detrimental to the homogeneity of the light beam emitted by the diode. The presence of the conductor along the extent and / or around the anodes is then useful to ensure a constant potential across the electrode. The electrical connection zones 22, 26 and 30 can then be contacted by conductive elastic lamellae (not visible) supported by the attached part 6 of the support of the module of FIG. 1. FIG. 5 is a side view of the part central and top of the light module of Figure 1. The path of a ray 14 emitted by one of the LEDs 34 illuminating one of the OLED diodes is shown. The spoke 14 is deflected a first time when it penetrates the transparent or translucent material of the collimator 12. This deviation is not visible taking into account the proximity between the diode 34 and the corresponding input face of the collimator 12. ray propagates essentially in a straight line in the collimator material until it reaches the exit face, in this case an exit facet. The spoke 14 is then deflected a second time so as to be directed towards a portion of the corresponding OLED diode 8 which is close to the central portion 41 of the substrate 4. In other words, the rays emitted by the diodes 34 are deflected by the collimators 12 so as to meet the corresponding OLED diodes 8 in areas of said diodes which are close to the optical axis. As mentioned above, the OLED diodes 8 consist of a superposition of several organic semiconductor layers between two electrodes of which one is transparent. In this case, the electrode located at the rear is reflective so that, on the one hand, the light emitted by the semiconductor layers is effectively directed forward, and on the other hand, the rays emitted by the LEDs 34 towards the OLED diodes 8 are reflected.
    [0016] The electrode located at the front can therefore be totally or at least predominantly transparent.
    [0017] The OLED diodes 8 advantageously form an angle α with a direction perpendicular to the optical axis of the module, this angle y being between 3 ° and 30 °, preferably between 5 ° and 25 °, more preferably between 8 ° and 10 °. 20 °. The OLED diodes 8 are also inclined forwardly. The angle a is greater than 0.5, preferably at 3 °, so as to allow the formation of the light beam corresponding to the spoke 14. This angle is also limited so that the light beam produced by the light rays emitted by the OLED diodes 8 are not too divergent with respect to the optical axis. The light beam produced by reflection of the rays 14 of the LEDs 34 can thus be produced independently of the activation of the OLED diodes 8. In other words, the light beam of the LEDs 34 can be added to the light beam produced. The module that has just been described can thus provide several light signaling functions. In this case, the central portion comprising the LED diodes 36 and the collimator 10 housed in the cavity of the substrate 4 can provide a direction indicator function (flashing). The OLED surface diodes 8 can provide a position signaling function (lantern). The LEDs 34 with the collimators 12 and the reflection property of the OLED diodes 8 can provide a braking indication function (stop function). In fact, the regulatory requirements in terms of photometry are higher for the stop function than for the lantern function. The presence of several diodes 34, more particularly on either side of the optical axis, and the reflection quality of the surface diodes 8 makes it possible to achieve these requirements. 25
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. An organic electroluminescence diode (8) comprising a first generally extended electrode (18); a second generally extended electrode (20) disposed opposite the first electrode (18), the second electrode (20) comprising at least two portions (201, 202) electrically isolated from each other; at least one emitting organic layer disposed between the first and second electrodes; areas of electrical connection (22, 26, 30) of the first and second electrodes (18, 20); several edges; characterized in that the electrical connection regions (22, 26, 30) of the first and second electrodes (18, 20) are located on at least one of the edges (83) of the diode.
    [0002]
    2. Diode (8) according to claim 1, characterized in that the first electrode (18) is electrically connected to at least two separate connection areas (22).
    [0003]
    3. Diode (8) according to one of claims 1 and 2, characterized in that at least one of the portions (202) of the second electrode (20) is electrically connected to at least two connection areas (28) distinct.
    [0004]
    4. Diode (8) according to one of claims 1 to 3, characterized in that at least one of the portions (202) of the second electrode (20) bypasses the other portion (201), or one of the other portions from the edge (83) or one of the edges including the electrical connection areas (22, 26, 30).
    [0005]
    5. Diode (8) according to claim 4, characterized in that the portion (202), or each of the portions, of the second electrode (20) which bypasses the other portion (201) or one of the other portions from the edge (83) comprising the electrical connection zones (22, 26, 30) is electrically connected to two distinct connection areas (28) disposed at said edge (83) on either side of at least one connection zone (30). ) electrically connected to the other (201) or one of the other portions that it bypasses. 30, diode (8) according to one of claims 1 to 5, characterized in that the first electrode (18) and / or at least one of the portions (201, 202) of the second electrode (20) comprises a electrical conductor (24, 32, 28) extending along said electrode (18) or electrode portion (201, 202), said conductor being of a separate material and better electrical conductor than the main material of said electrode or electrode portion, 7, diode (8) according to claim 6, characterized in that the electrical conductor (24, 32, 28) of the first electrode (18) and / or the portion or portions ( 201, 202) of the second electrode (20) extends to the area (s) of electrical contact (24, 32, 28) of said electrode (18) or electrode portion (s) ( 201, 202), 8, diode (8) according to one of claims 6 or 7, characterized in that the electrical conductor (24, 32, 28) of the first electrode (18) and / or the portion or portions (201, 202) of the second electrode (20) extends along a contour of said electrode (18) or electrode portion (s) (201, 202), 9. Diode (8) ) according to one of claims 1 to 8, characterized in that the first electrode (18) is reflective and / or the second electrode (20) is transparent. 10, diode (8) according to one of claims 1 to 9, characterized in that the electrical connection zones (22, 26, 30) are located, preferably exclusively, in the range of the diode (8) on one of its two main faces. 11. Light module (2), in particular for a motor vehicle, comprising: a support (4,
    [0006]
    6) of light source (s) (8, 34, 36); at least one surface light source (8) of the organic electroluminescence diode type on the support, capable of emitting a light beam oriented substantially along an optical axis of said module; characterized in that the surface light source or sources (8) are in accordance with one of claims 1 to 10, the light beam being adjustable by selective activation of the portions of the second electrode. 12, light module (2) according to claim 11, characterized in that the one or more surface light sources (8) extending transversely to the optical axis of the module, 13. Light module (2) according to one of the claims 11 or 12, characterized in that the light beam emitted by the surface light source (s) (8) is a first beam, the module (2) comprising one or more additional light sources (34) capable of illuminating the surface light sources (8) and to form a second light beam by reflection on said surface light sources (8). 14, light module (2) according to claim 13, characterized in that it comprises an optical device (12), preferably a collimator, capable of deflecting the light rays emitted by the additional light source (s) (34) according to a main direction, said deviated rays meeting the surface light source (s) (8) with a non-zero incidence angle. 16. Light module (2) according to one of claims 13 or 14, characterized in that the first beam corresponds to a position signaling function for a motor vehicle and / or the second beam corresponds to a braking signaling function. for a motor vehicle.
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    同族专利:
    公开号 | 公开日
    CN105428547A|2016-03-23|
    US9936562B2|2018-04-03|
    FR3025942B1|2017-12-01|
    US20160081159A1|2016-03-17|
    EP2995850B1|2020-10-14|
    EP2995850A1|2016-03-16|
    引用文献:
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    法律状态:
    2015-09-30| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-18| PLSC| Publication of the preliminary search report|Effective date: 20160318 |
    2016-09-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-09-29| PLFP| Fee payment|Year of fee payment: 4 |
    2018-09-28| PLFP| Fee payment|Year of fee payment: 5 |
    2019-09-30| PLFP| Fee payment|Year of fee payment: 6 |
    2020-09-30| PLFP| Fee payment|Year of fee payment: 7 |
    2021-09-30| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1458666A|FR3025942B1|2014-09-15|2014-09-15|MULTIFUNCTION LUMINOUS MODULE WITH SEGMENTED OLED DIODE|FR1458666A| FR3025942B1|2014-09-15|2014-09-15|MULTIFUNCTION LUMINOUS MODULE WITH SEGMENTED OLED DIODE|
    EP15184016.2A| EP2995850B1|2014-09-15|2015-09-07|Multifunctional light module with segmented oled diode|
    US14/853,187| US9936562B2|2014-09-15|2015-09-14|Multifunction luminous module with segmented OLED diode|
    CN201510587279.2A| CN105428547A|2014-09-15|2015-09-15|Multifunctional light module with segmented OLED diode|
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