• 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:
    A light emitting device comprises an organic electroluminescent panel (10) and a molding resin (24, 26). In the organic electroluminescent panel (10), an organic electroluminescent light emitting portion is formed on a substrate. The organic electroluminescent panel is flexible. The molding resin (24, 26) conforms to the organic electroluminescent panel (10) so that the organic electroluminescent panel (10) is in a curved state.
    公开号:FR3018393A1
    申请号:FR1551927
    申请日:2015-03-09
    公开日:2015-09-11
    发明作者:Toru Ito；Haruhiko Iyoda；Hironori Tsukamoto；Masaya Shido；Yoshiro Ito；Yukihiro Onoda
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    [0001] BACKGROUND Technical Field Examples of embodiments of the invention relate to a light emitting device including an organic electroluminescent panel and a lamp unit using the light emitting device.
    [0002] Associated Technique Vehicle lamp units are known utilizing, as a light source, a surface light emitting element such as an organic electroluminescent panel. JP-2013-45523 A (corresponding to US 2013/0049570 A) discloses a method of attaching a surface light emitting element in a frame-shaped support (frame) which is shaped to conform to the outer circumferential shape of the surface light emitting element.
    [0003] SUMMARY Due to their flexible structures, it is difficult to fix flexible organic light-emitting panels correctly and securely on frames, etc. When an organic electroluminescent panel is not securely attached to a frame or the like (for example, when only the four corners of an organic electroluminescent panel are attached), the organic electroluminescent panel can move away from the frame due to vibrations the organic electroluminescent panel itself may be deformed due to vibration or the like, which may result in it being impossible to achieve a desired level of light intensity or that the organic electroluminescent panel is damaged . An exemplary embodiment of the invention has been made in view of the above circumstances and provides a correct and solid fastening technique of a flexible organic electroluminescent panel. (1) According to an exemplary embodiment, a light emitting device comprises an organic electroluminescent panel and a molding resin. In the organic electroluminescent panel, an organic electroluminescent light emitting portion is formed on a substrate. The organic electroluminescent panel is flexible. The molding resin conforms to the organic electroluminescent panel so that the organic electroluminescent panel is in a curved state. Because of this configuration, since the organic electroluminescent panel is fixed with the molding resin, it is possible to properly and securely attach the organic electroluminescent panel which is in the curved form. (2) The light emitting device according to (1) may further include a power supply portion for the organic electroluminescent light emitting portion. The power supply portion is covered by the molding resin. With this configuration, the feed portions can be protected by the molding resin. (3) A lamp unit has the light emitting device according to any of (1) and (2) and a frame. The frame fixes the light emitting device so as to cover a light emitting area of the light emitting device. The frame has a window or a transparent portion at least in a portion of a portion covering the light emitting area of the frame. With this configuration, the light emitted by the light emission area can be projected through the frame. (4) In the lamp unit according to (3), the transparent portion of the frame may comprise a convex portion or a concave portion. With this configuration, the high quality design of the lamp unit can be provided, and the chassis can be provided with a lens function. (5) In the lamp unit according to any one of (3) and (4), the light-emitting device may be provided with a fixing hole which passes through the organic electroluminescent panel and the molding resin. . The frame may include a bracket adapted to be installed in the mounting hole.
    [0004] With this configuration, the light emitting device can be attached to the chassis without using any other fastener. (6) In the lamp unit according to any one of (3) and (4), the molding resin of the light-emitting device may include a fastening tab made of the molding resin. The frame may be provided with a mounting hole in which the bracket is installed. With this configuration, the light emitting device can be attached to the chassis without using any other fastener. Exemplary embodiments of the invention allow a flexible organic electroluminescent panel to be properly and securely attached. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be well understood and its advantages will be better understood on reading the following detailed description. The description refers to the following drawings, which are given by way of example. Fig. 1 is a sectional view showing a schematic configuration of an organic electroluminescent panel which is used in respective exemplary embodiments of the invention; FIGS. 2A to 2C illustrate a manufacturing process of a light emitting device according to a first exemplary embodiment of the invention; Fig. 3 is an enlarged view showing a securing portion of the light emitting device; Figs. 4A to 4C illustrate a process for manufacturing a light emitting device according to a second exemplary embodiment; Fig. 5A illustrates a method of attaching to a frame a light emitting device produced by either of the above manufacturing processes, according to a first example; Figure 5B shows another example of the chassis for use in this method; Figure 6 illustrates a method of attaching a light emitting device to a frame, according to a second example; Fig. 7 illustrates a method of attaching a light-emitting device to a chassis, according to a third example; Figs. 8A and 8B show modified chassis examples; Fig. 9 shows a method of attaching a light-emitting device to a frame, according to a fourth example; Fig. 10 illustrates a method of attaching a light-emitting device to a chassis, according to a fifth example; Fig. 11 illustrates a method of attaching a light-emitting device 10 to a chassis, according to a sixth example; and Figure 12 illustrates a method of attaching a light-emitting device to a chassis, according to a seventh example. DETAILED DESCRIPTION FIG. 1 is a sectional view showing a schematic configuration of an organic electroluminescent panel 10 which is used in respective exemplary embodiments (to be described later) of the invention. The organic electroluminescent panel 10 has a structure such as an anode layer 14 which is a transparent conductive film (for example, an indium tin oxide or ITO film). micro-reflective metal film 16, an organic electroluminescent light-emitting layer 18, and a cathode layer 20 which is a back-face conductive film, are deposited between (i) a front resin substrate 12 which is wholly or partially and (ii) a rear resin substrate 22. The organic electroluminescent panel 10 is flexible. The organic electroluminescent panel 10 may be used in a curved form. A process for manufacturing the organic electroluminescent panel 10 may include depositing the lamination structure from the anode layer 14 to the cathode layer 20, either on the resin substrate before 12, or on the substrate This is to say that the process of manufacturing the organic electroluminescent panel 10 may include the formation of the organic electroluminescent light emitting layer 18 (which is an example of a light emitting portion). electroluminescent organic material) on either one of the resin substrate before 12 or above the rear resin substrate 22. A flexible glass substrate or metal substrate may be used in place of the resin substrate prior to 12 and a rear resin substrate 22. A microcavity structure is formed by placing the micro-reflective metal film 16 between the anode layer 14 and the light emitting layer. The distance between the micro-reflective metal film 16 and the cathode layer 20 is chosen according to the wavelength of the light that is to be emitted by the organic electroluminescent light emitting layer 18 Due to the microcavity structure, the light emitted by the organic electroluminescent light emitting layer 18 is reflected repeatedly between the micro-reflective metal film 16 and the cathode layer 20 and only the light having a length of 20 μm. particular resonant wave is amplified. The luminance of the light-emitting portion can thus be improved. The organic electroluminescent panel 10 may be configured such that the micro-reflective metal film 16 is not provided between the anode layer 14 and the organic electroluminescent light emitting layer 18. Although not shown in Fig. 1, power supply portions which deliver energy to the organic electroluminescent light emitting layer 18 are formed at a plurality of positions on a peripheral portion of the front or rear surface of the organic electroluminescent panel 10. As As described above, it is difficult to fix a flexible organic electroluminescent panel correctly and securely, which can cause various problems. In an exemplary embodiment of the invention, the organic electroluminescent panel 10 which is in a desired curved state is shaped with a molding resin, so that a rigid light emitting device is produced. FIGS. 2A to 2C illustrate a process for manufacturing a light emitting device according to a first exemplary embodiment of the invention.
    [0005] First, as shown in Fig. 2A, a molding resin 24 which is shaped as a sheet slightly larger than the organic electroluminescent panel 10 is bonded to a surface of the organic electroluminescent panel 10. Molding resins 26, each of which between them being shaped into an elongate and narrow strip shape, are then bonded to both ends of the organic electroluminescent panel 10. The molding resins 24, 26 are constituted for example by a thermoplastic resin such as polypropylene, ABS or polycarbonate. A power cable 28 is connected to the power supply portions (not shown) of the organic electroluminescent panel 10. Then, as shown in FIG. 2B, the organic electroluminescent panel 10 and the molding resins 24, 26 are arranged in a female die 34 having a desired shape. The female matrix 34 is then combined with a corresponding male die 35, and the dies 34, 35 are heated, so that the molding resins 24, 26 are thermally welded together. Then, the dies 34, 35 are cooled and removed. A light emitting device 30 which is fixed in a curved state is thus obtained as shown in Fig. 2C. Connection portions between the power supply portions and the power supply cable 28 are also covered with the molding resin. In the manufacturing process illustrated in the first exemplary embodiment, fixing portions 32 made of molded resin 25 are formed at both ends of the light-emitting device 30. As shown in FIG. 3 (enlarged view), a screw hole 38 may be formed in each fastening portion 32. When the screw holes 38 are provided, the light-emitting device 30 in which the organic electroluminescent panel 10 is shaped in a state curved by the resin of The molding can be mounted directly to a lamp body without a frame or the like and can be used as a lamp unit. Figs. 4A to 4C illustrate a process for manufacturing a light emitting device according to a second exemplary embodiment.
    [0006] First, as shown in Figure 4A, the organic electroluminescent panel 10 is disposed in a female die 36 having a desired shape. The placement of the organic electroluminescent panel 10 in the female die 36 can be effected by vacuum suction through tiny holes which are formed in a concave wall of the female die 36. Then, as shown in FIG. 4B, the female die 36 and the organic electroluminescent panel 10 are combined with a corresponding male die 37. A discharge port (not shown) is formed through the male die 37 and liquid casting resin is poured into the space between the dies 36 and 37 through the discharge port. In this case, the molding resin is a thermosetting resin such as an epoxy resin or a phenolic resin or an ultraviolet curable resin, for example epoxy-acrylate or urethane-acrylate. After filling with the molding resin, the dies 36 and 37 are heated or illuminated with ultraviolet light, so that the molding resin is treated (cured). The dies 36 and 37 are then removed. As a result, a light-emitting device 30 which is fixed in a curved state is obtained as shown in FIG. 4C. When a rigid light emitting device 30 is made by shaping the organic electroluminescent panel 10 into the curved state by the molding resin as described above, the organic electroluminescent panel 10 which is in the curved state can be easily attached to a frame or the like of a lamp unit with high positioning accuracy. Securely affixed, the organic electroluminescent panel 10 can be prevented from being deformed or damaged due to vibrations of the lamp unit. When the organic electroluminescent panel 10 is incorporated in a vehicle lamp unit, displacement of the organic electroluminescent panel 10 can be prevented from preventing the vehicle lamp unit from satisfying a light intensity prescribed by law or rule. associated.
    [0007] Since the power supply portions of the organic electroluminescent panel 10 are covered with the molding resin, the power supply portions can be physically shielded and can be prevented from being subjected to corrosion due to exposure to water from outside. Fig. 5A illustrates a method of attaching a light-emitting device 40 which is produced as described above on a frame of a lamp unit, according to a first example. A frame 50 has a shape such that the frame 50 is entirely curved with approximately the same curvature as the light emitting device 40. The frame 50 is provided with recessed portions 52 at both ends to house the two portions of the frame. end of the light emitting device 40. The frame 50 also has tabs 54, each of which is formed through a through hole. The tabs 54 are used to secure the frame 50 to another member.
    [0008] The light-emitting device 40 is inserted into the recessed portions 52 so that the light-emitting surface 42 of the light-emitting device 40 is covered by the frame 50. The light-emitting device 40 is thus fixed to the frame 50. The entire frame 50 or a portion, corresponding to the light emitting area of the light emitting device 40, of the frame 50, is transparent or translucent and also allows the light to pass through. through. Alternatively, as shown in Fig. 5B, the frame 50 may be opaque and include a window 56 which is formed by cutting a portion, superimposed on the light emitting area of the light emitting device 40 of the frame 50 Figure 6 illustrates a method of attaching the light-emitting device 40 to a chassis of a lamp unit according to a second example. A frame 60 has a shape such that the frame 60 is entirely curved approximately with the same curvature as the light emitting device 40. The frame 60 is shaped with recessed portions 62 at both ends to accommodate the two portions of the frame. end of the light emitting device 40. The frame 60 also has tabs 64, each of which is formed through a through hole. The tabs 64 are used to secure the frame 60 to another member.
    [0009] The light-emitting device 40 is inserted into the recessed portions 62 so that a surface, opposite to the light-emitting surface 42, of the light-emitting device 40 is covered by the frame 60. light emitting device 40 is thus attached to the frame 60 so that the light emitting surface 42 is exposed. Fig. 7 illustrates a method of fixing the light-emitting device 40 according to a third example. A cover 70 and a frame 74 have such shapes that the cover 70 and the frame 74 are entirely curved approximately with the same curvature as the light-emitting device 40. The light-emitting device 40 is fixed so as to sandwiched between the cover 70 and the frame 74. The entire cover 70 or a portion, corresponding to the light emitting area of the light emitting device 40, of the cover 70 is transparent or semi-transparent and let the light pass through. The cover 70 has projecting portions 72 at its two ends, so that the protruding portions 72 cover both ends of the light-emitting device 40. The projecting portions 72 are connected to the frame 74 by welding, bolting, thermal crimping or the like. Alternatively, the cover 70 may be connected to the frame 74 by means of a fastener such as a screw or a nail. As in the attachment method shown in Fig. 5B, the cover 70 may be opaque and have a window which is formed by cutting a portion, superimposed on the light emitting area of the light emitting device 40 of the cover 70. As shown in FIG. 8A, a surface of the frame 70 which has been described with reference to FIG. 5 or a surface of the cover 70 which has been described with reference to FIG. 7 may be provided with protruding portions 82 With this configuration, the frame 50 or the cover 70 is given a convex lens function to diffuse the light emitted by the light-emitting device 40. Alternatively, the surface of the frame 50 or the cover 70 may be provided with recessed portions. Thanks to this configuration, the frame 50 or the cover 70 is given a concave lens function making it possible to converge the light emitted by the light-emitting device 40.
    [0010] As shown in Fig. 8B, windows 92 having desired shapes can be formed through frame 50 (or cover 70). This structure provides the frame 50 or the cover 70 of a high quality design. In this case, the frame 50 or the cover 70 may be transparent, smoked transparent or opaque. Fig. 9 shows a method of attaching a light-emitting device to a frame of a lamp unit, according to a fourth example. Several (four in FIG. 9) fastening tabs 112 which are formed of molding resin are formed in the circumferential edges of a light emitting device 110 including an organic electroluminescent panel. The fastening tabs 112 may be shaped using the molding dies shown in Figs. 2A-2C and 4A-4C by a post-shaping process of the light-emitting device 110 or the like. A frame 120 is curved approximately with the same curvature as the light emitting device 110 and its external shape is slightly larger than that of the light emitting device 110. The entire frame 120 or a portion, corresponding to the light emitting area of the light emitting device 110, the frame 120, is transparent or translucent and allows the light to pass through. The frame 120 is provided with fixing holes 122 in positions corresponding to the attachment tabs 112 of the light-emitting device 110. The fixing tabs 112 of the light-emitting device 110 are installed in the respective fixing holes 122 of the frame 120. The light-emitting device 110 is thus fixed to the frame 120. Conversely, a light-emitting device may be provided with fixing holes so that the fixing holes pass through both the organic electroluminescent panel. and the molding resin, and a frame may be provided with attachment tabs configured to be installed in the respective mounting holes. The chassis mounting tabs are installed in the respective mounting holes of the light-emitting device, so that the light-emitting device is attached to the chassis.
    [0011] Fig. 10 illustrates a method of attaching a light-emitting device to a frame of a lamp unit, according to a fifth example. Through holes 132 and through holes 142 are respectively formed through a frame 130 and a light emitting device 140 in positions such that through holes 132 correspond to respective through holes 142. Pins 144 are inserted into the pairs. respective through holes 132, 142, and both ends of each pin 144 are crimped. The light emitting device 140 is thus attached to the frame 130. Fig. 11 illustrates a method of attaching a light-emitting device to a frame of a lamp unit, according to a sixth example. A light emitting device 140 includes an organic electroluminescent panel 145 and a molding resin 146. As shown in FIG. 11, the organic electroluminescent panel 145 is molded away to one side (in FIG. upward) in the molding resin 146. As in the method of FIG. 10, through-holes 142, 143 are formed through the light-emitting device 140. The upper through-hole 142 is formed through to the Both the organic electroluminescent panel 145 and the molding resin 146. In general, an organic electroluminescent panel has, in its peripheral portion, a non-light emitting area in which electrodes and the like are to be formed. The through holes 142 are formed in the non-light emission zone. The lower through hole 143 is formed solely through the molding resin 146. Positioning pins 152 and 153 extend from the frame 150 in positions such as to correspond to the respective through-holes 142, 143. The positioning pins 152 and 153 are inserted into the respective through holes 142, 143, and then the front end portions of the positioning pins 152 and 153 are then crimped. The light emitting device 140 is thus fixed to the frame 150.
    [0012] As shown in Fig. 12, a light emitting device 160 may include a tab 164 which protrudes from the outer edge of the light emitting device 160. A screw hole or a bolt hole 162 is formed through the tab 164. The light emitting device 160 is fixed to a frame by means of a screw or a bolt.
    [0013] In FIGS. 10 to 12, the light emitting devices 140, 160 are extracted in the form of flat plates. However, even in the case where a light emitting device is curved, it may also be attached to a frame, the light emitting device may be attached to a frame by any of the following methods. above.
    [0014] In the exemplary embodiments described above, a single light emitting device is attached to a single frame. However, a plurality of light emitting devices which are arranged side by side can be attached to a single frame. In the exemplary embodiments described above, the organic electroluminescent panel is rectangular, in plan view. However, the external shape of the organic electroluminescent panel is not limited thereto. The organic electroluminescent panel can have any shape. In the case where the organic electroluminescent panel has a shape different from a rectangular shape, a frame is formed to conform to the outer shape of the organic electroluminescent panel. Lamp units which are made in accordance with the exemplary embodiments described above may be used for example as vehicle clearance lamps, daytime running lights, direction lights, tail lights, brake lights, etc.
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. A light emitting device (30, 40, 110, 140, 160) characterized in that it comprises: an organic electroluminescent panel (10) in which an organic electroluminescent light emitting portion is formed on a substrate, the organic electroluminescent panel (10) being flexible; and a molding resin (24, 26, 50, 60, 70, 74, 120, 150) that conforms the organic electroluminescent panel (10) so that the organic electroluminescent panel (10) is in a curved state.
    [0002]
    The light emitting device according to claim 1, further comprising: a power supply portion for the organic electroluminescent light emitting portion, the power supply portion being covered by the molding resin.
    [0003]
    A lamp unit comprising: the light emitting device according to any one of claims 1 to 2; and a frame (50) which secures the light-emitting device to cover a light-emitting area of the light-emitting device, wherein the frame (50) has a window (56) or a portion thereof At least in part of a portion covering the light-emitting area of the frame (50).
    [0004]
    The lamp unit of claim 3, wherein the transparent portion of the frame has a convex portion (82) or a concave portion.
    [0005]
    The lamp unit according to any one of claims 3 to 4, wherein the light emitting device (140) is provided with a fixing hole (142) which passes through the organic electroluminescent panel (145) and the molding resin (146), and the frame (150) has a bracket (152) configured to be installed in the mounting hole (142).
    [0006]
    The lamp unit according to any one of claims 3 to 4, wherein the molding resin of the light emitting device (110) comprises a fixing lug (112) made of the molding resin, and the frame (120) is provided with a fixing hole (122) in which the fixing lug (112) is installed.
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    CN109424925A|2017-08-23|2019-03-05|株式会社小糸制作所|Lamps apparatus for vehicle|
    JP6968619B2|2017-08-23|2021-11-17|スタンレー電気株式会社|Vehicle lighting|
    EP3737889B1|2018-01-09|2021-09-15|OLEDWorks GmbH|Thin oled lighting module|
    JP2019160398A|2018-03-07|2019-09-19|株式会社小糸製作所|Vehicle lamp fitting|
    KR101972280B1|2018-12-14|2019-08-16|이수빈|Lighting body side panel and manufacturing method thereof|
    法律状态:
    2016-02-03| PLFP| Fee payment|Year of fee payment: 2 |
    2017-02-09| PLFP| Fee payment|Year of fee payment: 3 |
    2017-08-18| PLSC| Publication of the preliminary search report|Effective date: 20170818 |
    2018-02-07| PLFP| Fee payment|Year of fee payment: 4 |
    2020-02-14| PLFP| Fee payment|Year of fee payment: 6 |
    2021-12-10| ST| Notification of lapse|Effective date: 20211105 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2014046416|2014-03-10|
    JP2014046416A|JP6383548B2|2014-03-10|2014-03-10|Lamp|
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