JP2015002124A - Organic el light emitting diode and organic el lighting system - Google Patents

Organic el light emitting diode and organic el lighting system Download PDF

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JP2015002124A
JP2015002124A JP2013126985A JP2013126985A JP2015002124A JP 2015002124 A JP2015002124 A JP 2015002124A JP 2013126985 A JP2013126985 A JP 2013126985A JP 2013126985 A JP2013126985 A JP 2013126985A JP 2015002124 A JP2015002124 A JP 2015002124A
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雅考 長谷川
Masataka Hasegawa
雅考 長谷川
鈴木 堅吉
Kenkichi Suzuki
堅吉 鈴木
龍太郎 前田
Ryutaro Maeda
龍太郎 前田
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National Institute of Advanced Industrial Science and Technology AIST
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Abstract

PROBLEM TO BE SOLVED: To solve four problems (problems of a shape of a light emitting surface, flexibility, heat dissipation, and color rendering properties) which are inherent in current flat substrate techniques, when an organic EL light emitting diode is applied for a lighting system.SOLUTION: A transparent, flexible and long plastic tape 12 configures a linear and flexible one-dimensional anode substrate in which a graphene film 14 is formed, as a transparent electrode, on the whole area of a smooth surface, and a metal electrode 15 is formed on a side face to be in electrical contact with the graphene film 14. An organic EL layer 16 and a cathode electrode 17 are laminated on the graphene film 14. A sealing structure is a structure where an insulating adhesive layer, which is formed at a width direction end part of a one-dimensional cathode substrate comprising metal films 23, 24 formed on both sides of a long plastic tape 22, is deformed by following the one-dimensional anode substrate 11 in bonding to seal the organic EL layer 16 and the graphene film with a sealing portion 42.

Description

本発明は有機EL発光ダイオード及び有機EL照明装置に係り、特にフレキシブルな構造の有機EL(エレクトロルミネセンス)発光ダイオード及びそれを用いた有機EL照明装置に関する。   The present invention relates to an organic EL light emitting diode and an organic EL lighting device, and more particularly to an organic EL (electroluminescence) light emitting diode having a flexible structure and an organic EL lighting device using the same.

有機EL照明装置は、有機EL発光ダイオードと、その通電端子と、電源・制御回路とが主要構成要素である。有機EL発光ダイオードは、基板上に陽極電極としての透明導電膜(ITO;Indium Tin Oxide)、有機EL層、及び陰極電極の順で積層された構造で、かつ、封止構造をもつ。フレキシブルな有機EL照明装置における有機EL発光ダイオードの基板は、透明電極としてITO膜を成膜したプラスチック基板である。通常、ITO膜の抵抗による輝度傾斜を低減するために、ITO膜上又は予め基板上に金属膜の細いメッシュが成膜される。   The organic EL lighting device mainly includes an organic EL light emitting diode, its energization terminal, and a power supply / control circuit. The organic EL light emitting diode has a structure in which a transparent conductive film (ITO) as an anode electrode, an organic EL layer, and a cathode electrode are stacked in this order on a substrate, and has a sealing structure. The substrate of the organic EL light emitting diode in the flexible organic EL lighting device is a plastic substrate having an ITO film formed as a transparent electrode. Usually, in order to reduce the brightness gradient due to the resistance of the ITO film, a thin mesh of a metal film is formed on the ITO film or on the substrate in advance.

上記有機EL層は、薄膜の面状発光体であり、上記プラスチック基板上に成膜される。成膜の方法は、有機EL材料が低分子系材料の場合は真空蒸着成膜により、有機EL材料が高分子系材料の場合はスピン塗布又はロール・ツウ・ロールのダイコーティング法あるいはロールコーティング等の手段による塗布成膜である。上記陰極電極は、有機EL層上に蒸着で形成される。陰極端子の取り出しのため、ITO膜を成膜した基板の周辺部はITO膜を除去するか、又は絶縁膜でカバーされており、ここに電極端子を設けて陰極電極が接続される。   The organic EL layer is a thin planar light emitter and is formed on the plastic substrate. When the organic EL material is a low molecular weight material, the film is formed by vacuum vapor deposition. When the organic EL material is a high molecular weight material, spin coating, roll-to-roll die coating, roll coating, etc. The coating film formation by the means. The cathode electrode is formed on the organic EL layer by vapor deposition. In order to take out the cathode terminal, the peripheral portion of the substrate on which the ITO film is formed is covered with an insulating film or the ITO film is removed, and an electrode terminal is provided here to connect the cathode electrode.

有機EL層に対する防湿、ガスバリヤ膜として、SiNx、SiOx、AlxOy等の無機膜を用いるのが基本である。これらの無機膜は本質的に可撓性がなく、成膜において大面積になる程ピンホールの率が高くなるので、これらの無機膜とポリマー膜との交互多重層によってバリヤ性と可撓性を実現している。この交互多重層は、プラスチック基板のバリヤ膜及び有機EL発光ダイオードの封止膜として用いられる。   Basically, an inorganic film such as SiNx, SiOx, AlxOy is used as a moisture-proof and gas barrier film for the organic EL layer. These inorganic films are inherently inflexible, and the pinhole ratio increases as the area increases, so barrier properties and flexibility can be achieved by alternating layers of these inorganic films and polymer films. Is realized. This alternating multilayer is used as a barrier film of a plastic substrate and a sealing film of an organic EL light emitting diode.

上記平面基板以外に、従来から線状の有機EL発光ダイオードが知られている(例えば、特許文献1〜3参照)。すなわち、特許文献1には、金属導体線を陰極として、その周囲に有機EL層、ITOの順で積層した構造の線状の有機EL発光ダイオードが開示されている。また、特許文献2、3には、プラスチックファイバー上に陰極電極を成膜し、この上に有機EL層、ITOの順で積層した有機EL発光ダイオードが開示されている。いずれも所謂トップエミッション(top-emission)タイプの発光素子である。なお、特許文献1,3にはこれら線状の有機EL発光ダイオードを編んで平面状の発光体とすることが開示されている。また、特許文献1には、金属導体線を円形の断面に限らず、矩形状の断面の実施例も開示されている。   In addition to the above-described planar substrate, linear organic EL light emitting diodes are conventionally known (for example, see Patent Documents 1 to 3). That is, Patent Document 1 discloses a linear organic EL light-emitting diode having a structure in which a metal conductor wire is used as a cathode and an organic EL layer and ITO are laminated around the metal conductor wire in that order. Patent Documents 2 and 3 disclose organic EL light-emitting diodes in which a cathode electrode is formed on a plastic fiber and an organic EL layer and ITO are laminated on the cathode electrode. Both are so-called top-emission type light emitting elements. Patent Documents 1 and 3 disclose that these linear organic EL light emitting diodes are knitted to form a planar light emitter. Further, Patent Document 1 discloses an example of a rectangular cross section as well as a circular cross section of the metal conductor wire.

有機EL照明装置は、現状では蛍光灯や発光ダイオード(LED;Light Emitting Diode)の効率、演色性、輝度、寿命、価格等全てについて及ばない。しかし、低分子系材料の有機EL材料を用いる有機EL照明装置では、化学ドーピング、励起三重項、マルチフォトン等の材料、デバイス技術により原理的に効率、演色性等は蛍光灯を超えることが確実となってきた。また、高分子系材料の有機EL材料を用いる有機EL照明装置も、最近は共役系の高輝度、長寿命材料が開発されてきており、近い将来には108Hr-cd/m2、すなわち、104cd/m2で1万時間という蛍光灯並みの性能が実現されると期待されている。 At present, the organic EL lighting device does not have all of the efficiency, color rendering, luminance, lifetime, price, etc. of fluorescent lamps and light emitting diodes (LEDs). However, in organic EL lighting devices using organic EL materials of low molecular weight materials, it is certain that efficiency, color rendering, etc. will exceed those of fluorescent lamps in principle by materials such as chemical doping, excitation triplets, and multiphotons, and device technology. It has become. In addition, conjugated high-brightness and long-life materials have recently been developed for organic EL lighting devices using polymer-based organic EL materials. In the near future, 10 8 Hr-cd / m 2 , that is, It is expected that a fluorescent lamp performance of 10,000 hours at 10 4 cd / m 2 will be realized.

特開平10−64678号公報JP-A-10-64678 特開2002−184580号公報JP 2002-184580 A 特開2002−352949号公報JP 2002-352949 A

このように、有機EL照明装置は、発光性能に関しては将来的には実用レベルの可能性は高い。また、有機EL発光ダイオードは拡散光源で原理的に超薄型、フレキシブルとデザイン性に優れた特長を持つ。しかしながら、有機EL発光ダイオードを照明装置に適用する場合、現状の平面基板技術に内在する四つの問題がある。   Thus, the organic EL lighting device has a high possibility of practical use in the future with respect to the light emission performance. Organic EL light-emitting diodes are diffused light sources, and in principle are ultra-thin, flexible and have excellent design characteristics. However, when an organic EL light emitting diode is applied to a lighting device, there are four problems inherent in the current planar substrate technology.

第一の問題は、発光面の形状の問題である。有機EL照明は「平面照明体」であるが、導電端子と封止構造とから大判のパネルから任意の形状に切り取ることはできない。「規格形状」を設定するとしても、種々のデザインに適合する形状を決めることは困難である。例えば、タイル状、帯状を規格形状に決めても、デザイン面からは一般性がない。   The first problem is the shape of the light emitting surface. The organic EL illumination is a “planar illuminator”, but cannot be cut into an arbitrary shape from a large panel due to the conductive terminal and the sealing structure. Even if “standard shape” is set, it is difficult to determine a shape suitable for various designs. For example, even if tiles and strips are determined as standard shapes, there is no generality in terms of design.

第二の問題は、フレキシビリティの問題である。フレキシビリティの実現にはプラスチックフィルムを基板として用いることが必須で、このためにはまず、ガスバリヤ層を基板に積層する必要がある。ただし、基板のプラスチックフィルム上にガスバリヤ膜として前述の交互多重層によってバリヤ性と可撓性を実現しても、この交互多重層は完全にはフレキシブルでない。更に問題は、公知の文献(“A mechanical assessment of flexible optpelectrononic devices”,Thin Solid Films 394(2001)202-206)に記載されているように、ITO膜は屈曲によって容易に破断する。更に、ITO膜からインジウム(In)が拡散して有機EL膜を劣化させることが広く知られている。そのため、通常はITO膜と有機EL層との間にバリヤ層を設けている。以上の点から前述の線状の有機EL発光体ダイオードの形態は用いることができない。   The second problem is flexibility. In order to realize flexibility, it is indispensable to use a plastic film as a substrate. For this purpose, it is necessary to first laminate a gas barrier layer on the substrate. However, even if barrier properties and flexibility are realized by the above-described alternating multilayer as a gas barrier film on the plastic film of the substrate, the alternating multilayer is not completely flexible. A further problem is that ITO films are easily broken by bending, as described in known literature ("A mechanical assessment of flexible optoelectronic devices", Thin Solid Films 394 (2001) 202-206). Furthermore, it is widely known that indium (In) diffuses from the ITO film to degrade the organic EL film. Therefore, a barrier layer is usually provided between the ITO film and the organic EL layer. From the above points, the above-described linear organic EL light emitting diode cannot be used.

第三の問題は、放熱の問題である。有機EL発光ダイオードは電流駆動で電流密度も高輝度では100mA/cm2以上であり、発光効率の面から発熱が大きい。放熱構造に関しては、有機EL表示装置(OLED;Organic Light Emissive Display)では現実の問題として各種の対策が講じられつつあるが、それよりも発光面積が大きく高い輝度の有機EL照明装置では放熱構造はとりわけ重要な問題である。陰極からの放熱が有効であるが、前述の交互多重層のガスバリヤ層あるいはフィルムは熱伝導性が悪く放熱を阻害する。 The third problem is the problem of heat dissipation. The organic EL light-emitting diode is driven by current and the current density is 100 mA / cm 2 or more at high luminance, and the heat generation is large from the viewpoint of light emission efficiency. Regarding the heat dissipation structure, various measures are being taken as an actual problem in the organic light emitting display (OLED), but in the organic EL lighting device having a larger light emitting area and higher brightness, the heat dissipation structure is This is a particularly important issue. Although the heat radiation from the cathode is effective, the gas barrier layer or film of the above-mentioned alternate multilayers has poor thermal conductivity and inhibits heat radiation.

第四の問題は、演色性の問題である。例えば、欧州では蛍光灯より白熱灯の方が好まれているという様に、照明は心理的な要素が多く、製品としては演色性の微妙な調整が不可欠である。また、白色発光の場合、成膜で発光の色合いは決まってしまい、調整は膜厚、材料比率等で制御することになるが、微妙な差を再現性良く実現することは相当困難である。   The fourth problem is the color rendering property. For example, incandescent lamps are preferred over fluorescent lamps in Europe, and lighting has many psychological elements, and as a product, fine adjustment of color rendering is essential. In the case of white light emission, the color of light emission is determined by film formation, and the adjustment is controlled by the film thickness, the material ratio, etc., but it is quite difficult to realize subtle differences with good reproducibility.

本発明は以上の点に鑑みなされたもので、上記の四つの問題を完全に解決した有機EL発光ダイオード及び有機EL照明装置を提供することを目的とする。   The present invention has been made in view of the above points, and an object thereof is to provide an organic EL light-emitting diode and an organic EL lighting device that completely solve the above four problems.

上記の目的を達成するため、本発明の有機EL発光ダイオードは、透明でフレキシブルな長尺のプラスチックテープと、プラスチックテープの平滑面上全面に透明電極として形成された透光性を有し、かつ、フレキシブルな導電性フィルムと、プラスチックテープの側面に導電性フィルムと電気的接触をもって形成された金属電極とからなる線状でフレキシブルな一次元陽極基板と、導電性フィルムの表面全面に連続的に形成された有機EL層と、有機EL層上に有機EL層よりも狭い幅で連続的に形成された陰極電極とを有することを特徴とする。   In order to achieve the above object, the organic EL light-emitting diode of the present invention has a transparent and flexible long plastic tape, and translucency formed as a transparent electrode on the entire smooth surface of the plastic tape, and A linear and flexible one-dimensional anode substrate composed of a flexible conductive film and a metal electrode formed in electrical contact with the conductive film on the side surface of the plastic tape, and continuously over the entire surface of the conductive film It has the formed organic electroluminescent layer, and the cathode electrode continuously formed in the width | variety narrower than an organic electroluminescent layer on an organic electroluminescent layer, It is characterized by the above-mentioned.

また、上記の目的を達成するため、本発明の有機EL発光ダイオードは、透明でフレキシブルな長尺の第1のプラスチックテープと、第1のプラスチックテープの平滑面上全面に透明電極として形成された透光性を有し、かつ、フレキシブルな導電性フィルムと、第1のプラスチックテープの側面に導電性フィルムと電気的接触をもって形成された金属電極とからなる線状でフレキシブルな一次元陽極基板と、導電性フィルムの表面全面に連続的に形成された有機EL層と、有機EL層上に有機EL層よりも狭い幅で連続的に形成された陰極電極と、片面又は両面が平滑面とされた長尺の第2のプラスチックテープの両面に第1及び第2の金属膜が形成されるとともに、スルーホールを介して第1及び第2の金属膜が電気的に接続された長尺でフレキシブルな基板構造、又は少なくとも一面が平滑面である長尺の金属テープである基板構造の一次元陰極基板と、を備え、一次元陰極基板の平滑側の表面において、一次元陰極基板の幅方向の中央部に形成された導電性接着層を介して陰極電極と一次元陰極基板の第1及び第2の金属膜又は金属テープとを電気的に接続するとともに、一次元陰極基板の幅方向の両端部に形成された絶縁性接着層により有機EL層及び導電性フィルムを封止する構造であることを特徴とする。   Moreover, in order to achieve said objective, the organic electroluminescent light emitting diode of this invention was formed as a transparent electrode on the whole surface on the smooth surface of a transparent and flexible 1st plastic tape and a 1st plastic tape. A linear and flexible one-dimensional anode substrate comprising a light-transmitting and flexible conductive film, and a metal electrode formed in electrical contact with the conductive film on the side surface of the first plastic tape; The organic EL layer continuously formed on the entire surface of the conductive film, the cathode electrode continuously formed on the organic EL layer with a narrower width than the organic EL layer, and one or both surfaces are smoothed The first and second metal films are formed on both sides of the long second plastic tape, and the first and second metal films are electrically connected through the through holes. A one-dimensional cathode substrate having a flexible substrate structure or a substrate structure that is a long metal tape having at least one smooth surface, and the width direction of the one-dimensional cathode substrate on the smooth surface of the one-dimensional cathode substrate. The cathode electrode and the first and second metal films or metal tapes of the one-dimensional cathode substrate are electrically connected through the conductive adhesive layer formed at the center of the substrate, and the width direction of the one-dimensional cathode substrate is The organic EL layer and the conductive film are sealed by an insulating adhesive layer formed at both ends.

また、上記の目的を達成するため、本発明の有機EL発光ダイオードは、第2のプラスチックテープの平滑面側に形成された第1又は第2の金属膜の表面、又は金属テープの平滑面側の一次元陰極基板の表面において、一次元陰極基板の幅方向の中央部に形成された導電性接着層と、一次元陰極基板の幅方向の両端部に導電性接着層と重ならないように形成された絶縁性接着層とを、一次元陽極基板上に有機EL層を介して積層された陰極電極とを対向させて真空内加圧により接合し、導電接着層を介して陰極電極と第1及び第2の金属膜、又は金属テープとを電気的に接続するとともに、絶縁性接着層を一次元陽極基板の幅方向の両端部の構造に倣って変形させて有機EL層及び導電性フィルムのシール部として形成した構造としてもよい。ここで、上記の発明の導電性フィルムは、グラフェンフィルムであってよい。   In order to achieve the above object, the organic EL light-emitting diode according to the present invention includes a surface of the first or second metal film formed on the smooth surface side of the second plastic tape, or a smooth surface side of the metal tape. On the surface of the one-dimensional cathode substrate, the conductive adhesive layer formed at the center in the width direction of the one-dimensional cathode substrate and the conductive adhesive layer on both ends in the width direction of the one-dimensional cathode substrate are formed so as not to overlap. The insulative adhesive layer thus formed is bonded to the cathode electrode laminated on the one-dimensional anode substrate via the organic EL layer by pressure in a vacuum, and the cathode electrode and the first electrode are bonded via the conductive adhesive layer. And the second metal film or the metal tape are electrically connected, and the insulating adhesive layer is deformed in accordance with the structure of both end portions in the width direction of the one-dimensional anode substrate to thereby form the organic EL layer and the conductive film. It is good also as a structure formed as a seal part.Here, the conductive film of the above invention may be a graphene film.

また、上記の目的を達成するため、本発明の有機EL照明装置は、上記発明の線状の有機EL発光ダイオードを、その長手方向における任意の長さで切り取った構造の線状色発光体が複数本並列に配列され、かつ、曲面状を含む任意の外観形状に成形された照明体と、複数本の線状色発光体の発光輝度を制御する制御回路とを備え、   In order to achieve the above object, the organic EL lighting device of the present invention includes a linear color light emitter having a structure in which the linear organic EL light emitting diode of the present invention is cut out at an arbitrary length in the longitudinal direction. A plurality of lighting devices arranged in parallel and formed into an arbitrary external shape including a curved surface, and a control circuit for controlling the light emission luminance of the plurality of linear color light emitters,

前記照明体は、線状色発光体として白色光を発光する白色発光体を複数本並列に配列した第1の構造、線状色発光体として互いに補色関係にある2種類の色光を別々に発光する2つの線状色発光体を一組として組単位で複数組並列に配列した第2の構造、及び三原色関係にある3種類の色光を別々に発光する3つの線状色発光体を一組として組単位で複数組並列に配列した第3の構造のうち、いずれか一の構造を有することを特徴とする。   The illuminator has a first structure in which a plurality of white light emitters emitting white light are arranged in parallel as a linear color light emitter, and separately emits two types of color lights that are complementary to each other as a linear color light emitter. A set of two linear color light emitters that separately emit three types of color light having three primary colors, and a second structure in which a plurality of sets of linear color light emitters are arranged in parallel as a set. As a feature of the present invention, any one of the third structures arranged in parallel in units of sets is provided.

ここで、前記制御回路は、照明体が第2の構造を有するときは2つの線状色発光体の輝度を互いに独立して制御し、照明体が第3の構造を有するときは3つの線状色発光体の輝度を互いに独立して制御することを特徴とする。   Here, the control circuit controls the luminance of the two linear color light emitters independently of each other when the illuminating body has the second structure, and three lines when the illuminating body has the third structure. The brightness of the color light emitters is controlled independently of each other.

本発明の有機EL発光ダイオードによれば、フレキシブルな線状の一次元陽極基板を有機EL層の基板として用いることにより、フレキシブルな線状色発光体である有機EL発光ダイオードを構成できるため、薄型・フレキシブリティの問題を解決できる。また、本発明の有機EL発光ダイオードによれば、電極膜が形成された、あるいはそれ自身が金属テープであるフレキシブルで薄型の一次元陰極基板とグラフェン膜との間に有機EL層をサンドイッチする構造とすることで、高い封止構造を実現できるととともに放熱の問題も解決できる。   According to the organic EL light-emitting diode of the present invention, since a flexible linear one-dimensional anode substrate can be used as the substrate of the organic EL layer, an organic EL light-emitting diode that is a flexible linear color light emitter can be configured.・ Resolve the problem of flexibility. In addition, according to the organic EL light emitting diode of the present invention, a structure in which an organic EL layer is sandwiched between a flexible thin thin one-dimensional cathode substrate and a graphene film on which an electrode film is formed or a metal tape itself is formed. As a result, a high sealing structure can be realized and the problem of heat dissipation can be solved.

また、本発明の有機EL照明装置によれば、本発明の線状の有機ELダイオードを任意の長さで切り取った構造の色発光体を複数本並列に配列した照明体を用いることにより、曲面状を含む任意の外観形状の照明体を成形することが可能となり、デザイン自由度の問題が解決される。更に、本発明によれば、調光・調色可能な有機EL照明装置を実現でき、演色性の問題を解決できる。   Moreover, according to the organic EL lighting device of the present invention, a curved surface is obtained by using a lighting body in which a plurality of color light emitters having a structure obtained by cutting out the linear organic EL diode of the present invention at an arbitrary length are arranged in parallel. It is possible to form an illuminating body having an arbitrary appearance shape including a shape, and the problem of design freedom is solved. Furthermore, according to the present invention, an organic EL lighting device capable of light control and color adjustment can be realized, and the problem of color rendering can be solved.

本発明に係る有機EL発光ダイオードの要部の一実施形態の断面図である。It is sectional drawing of one Embodiment of the principal part of the organic electroluminescent light emitting diode which concerns on this invention. 本発明に係る有機EL発光ダイオードの他の要部の各実施形態の断面図である。It is sectional drawing of each embodiment of the other principal part of the organic electroluminescent light emitting diode which concerns on this invention. 一次元陰極基板を用いた封止構造の一例の断面図である。It is sectional drawing of an example of the sealing structure using a one-dimensional cathode substrate. 本発明に係る有機EL発光ダイオードの一実施形態の断面図である。It is sectional drawing of one Embodiment of the organic electroluminescent light emitting diode which concerns on this invention. 本発明の有機EL発光ダイオードを用いた本発明に係る有機EL照明装置の各実施形態の平面図である。It is a top view of each embodiment of the organic EL lighting device concerning the present invention using the organic EL light emitting diode of the present invention. 本発明に係る有機EL照明装置の各実施形態の概略外観図である。It is a schematic external view of each embodiment of the organic EL lighting device according to the present invention. 本発明に係る有機EL照明装置の一実施形態の等価回路図である。It is an equivalent circuit diagram of one embodiment of an organic EL lighting device according to the present invention. 本発明に係る有機EL発光ダイオードの製造装置の一例の構成図である。It is a block diagram of an example of the manufacturing apparatus of the organic EL light emitting diode which concerns on this invention.

次に、本発明の実施形態について図面を参照して詳細に説明する。
本発明の有機EL発光ダイオードの第一の特徴は、薄型・フレキシブルな構造を実現するために後述する一次元陽極基板を有機EL層の基板として用いる点にある。また、本発明の有機EL発光ダイオードの第二の特徴は、薄型・フレキシブルな構造を実現するために発光ダイオードの封止構造として、長尺のテープ状の後述する一次元陰極基板を用いる点にある。
Next, embodiments of the present invention will be described in detail with reference to the drawings.
The first feature of the organic EL light-emitting diode of the present invention is that a one-dimensional anode substrate described later is used as a substrate for the organic EL layer in order to realize a thin and flexible structure. The second feature of the organic EL light-emitting diode of the present invention is that a long tape-like one-dimensional cathode substrate described later is used as a light-emitting diode sealing structure in order to realize a thin and flexible structure. is there.

まず、本発明の有機EL発光ダイオードの第一の特徴について図1とともに説明する。図1は、本発明に係る有機EL発光ダイオードの要部の一実施形態の断面図を示す。同図に示す本実施形態の有機EL発光ダイオードの要部は、一次元陽極基板11上に複数層の有機EL層16及び陰極電極17の順で積層された構造である。   First, the first feature of the organic EL light emitting diode of the present invention will be described with reference to FIG. FIG. 1 shows a cross-sectional view of one embodiment of the main part of an organic EL light emitting diode according to the present invention. The main part of the organic EL light-emitting diode of this embodiment shown in the figure has a structure in which a plurality of organic EL layers 16 and a cathode electrode 17 are laminated in this order on a one-dimensional anode substrate 11.

一次元陽極基板11は、透明でフレキシブルなプラスチックテープ12と、そのプラスチックテープ12の平滑面に接着層13によって接合されたグラフェン膜14と、プラスチックテープ12の両側面にグラフェン膜14と接触するように形成された金属電極15とからなる、透明でフレキシブルなテープ状基板である。プラスチックテープ12は、透明かつフレキシブルで、また長手方向(図1の紙面に直交する方向)の長さが極めて長い所謂長尺のテープである。更に、プラスチックテープ12は、表面と裏面のうち少なくともグラフェン膜14が成膜される側の平面が、例えば数nm以下の面粗さの平滑面に形成されている。   The one-dimensional anode substrate 11 is in contact with the transparent and flexible plastic tape 12, the graphene film 14 bonded to the smooth surface of the plastic tape 12 by the adhesive layer 13, and the graphene film 14 on both sides of the plastic tape 12. It is a transparent and flexible tape-shaped board | substrate which consists of the metal electrode 15 formed in this. The plastic tape 12 is a so-called long tape that is transparent and flexible and has an extremely long length in the longitudinal direction (a direction perpendicular to the paper surface of FIG. 1). Furthermore, the plastic tape 12 has a smooth surface with a surface roughness of, for example, several nm or less, at least on the surface on the side where the graphene film 14 is formed, of the front and back surfaces.

グラフェン膜14は、透光性を有し、かつ、フレキシブルな導電性フィルムであるグラフェンフィルムによる薄膜で、プラスチックテープ12の平滑面に接着層13によって接合されて透明電極(陽極)として用いられる。なお、プラスチックテープ12の平滑面及びグラフェン膜14のそれぞれにSAM(Self-Assembling Monolayer)処理を施し、これらのいずれか又は両方に接着分子層を形成するか、あるいはマイクロプラズマ処理等のドライ処理を併用することにより分子間の化学結合によって接合するようにしてもよい。金属電極15は、グラフェン膜14と電気的接触を持つように、プラスチックテープ12の両側面に形成されている。有機EL発光ダイオードの薄型・フレキシブルを実現するにはプラスチックフィルムを用いることが必須であるが、本実施形態は、この薄型・フレキシブルな構造の一次元陽極基板11を、有機EL層16の基板として用いる点に第一の特徴がある。   The graphene film 14 is a thin film made of a graphene film, which is a light-transmitting and flexible conductive film, and is bonded to the smooth surface of the plastic tape 12 by the adhesive layer 13 and used as a transparent electrode (anode). In addition, each of the smooth surface of the plastic tape 12 and the graphene film 14 is subjected to SAM (Self-Assembling Monolayer) treatment, and either or both of them are formed with an adhesion molecular layer, or dry treatment such as microplasma treatment is performed. You may make it join by the chemical bond between molecule | numerators by using together. The metal electrode 15 is formed on both side surfaces of the plastic tape 12 so as to have electrical contact with the graphene film 14. In order to realize thin and flexible organic EL light emitting diodes, it is essential to use a plastic film. In this embodiment, the one-dimensional anode substrate 11 having the thin and flexible structure is used as a substrate for the organic EL layer 16. The first feature is in use.

有機EL層16は、グラフェン膜14上の全面に連続的に成膜されている。陰極電極17は、有機EL層16上に、有機EL層16の幅(図1中、横方向の長さ)よりも狭い幅で一次元陽極基板11の長手方向(図1の紙面に直交する方向)に連続的に蒸着等により形成されている。有機EL層16は、グラフェン膜14と陰極電極17との間に供給される表示信号レベルに応じた輝度で発光する。かかる構造の有機EL発光ダイオードの要部は、薄型でフレキシブルな構造の線状の有機EL発光ダイオードの要部を構成している。   The organic EL layer 16 is continuously formed on the entire surface of the graphene film 14. The cathode electrode 17 has a width narrower than the width of the organic EL layer 16 (the length in the horizontal direction in FIG. 1) on the organic EL layer 16 and is orthogonal to the longitudinal direction of the one-dimensional anode substrate 11 (the paper of FIG. 1). Direction) in a continuous manner by vapor deposition or the like. The organic EL layer 16 emits light with a luminance corresponding to the display signal level supplied between the graphene film 14 and the cathode electrode 17. The main part of the organic EL light-emitting diode having such a structure constitutes the main part of a linear organic EL light-emitting diode having a thin and flexible structure.

次に、本発明の有機EL発光ダイオードの第二の特徴である封止構造について説明する。
一次元陽極基板11の透明電極であるグラフェン膜14はフレキシブルで、かつ、理想的なガスバリヤ層となっている。そこで、本発明では、陰極側の封止キャップとして、長尺のテープ状金属フィルム、あるいはフレキシブルなプラスチックテープの両面に金属膜が形成され、かつ、相対する金属膜は複数のスルーホールによって導通した構造である一次元陰極基板を用いることを第二の特徴とする。
Next, the sealing structure which is the second feature of the organic EL light emitting diode of the present invention will be described.
The graphene film 14 that is a transparent electrode of the one-dimensional anode substrate 11 is flexible and an ideal gas barrier layer. Therefore, in the present invention, a metal film is formed on both sides of a long tape-shaped metal film or a flexible plastic tape as a sealing cap on the cathode side, and the opposing metal films are conducted by a plurality of through holes. A second feature is to use a one-dimensional cathode substrate having a structure.

図2は、本発明に係る有機EL発光ダイオードの他の要部の各実施形態の断面図を示す。有機EL発光ダイオードの他の要部である一次元陰極基板は、封止構造のキャップと陰極電極の端子の両機能を有する基板である。一次元陰極基板には図2(a),(b)の断面図に示す2種類があり、いずれも薄型でフレキシブルな構造である。   FIG. 2 shows a cross-sectional view of each embodiment of another main part of the organic EL light emitting diode according to the present invention. The one-dimensional cathode substrate, which is another main part of the organic EL light emitting diode, is a substrate having both functions of a cap of a sealing structure and a terminal of the cathode electrode. There are two types of one-dimensional cathode substrates shown in the cross-sectional views of FIGS. 2A and 2B, both of which are thin and flexible.

図2(a)に示す一次元陰極基板は、一次元陽極基板11と同じ幅で、少なくとも一面が例えば数nm以下の面粗さに形成されたフレキシブルな金属テープ21である。金属テープ21は、陰極電極の端子として用いられ、また封止構造のキャップとして用いられる。図2(b)に示す一次元陰極基板は、フレキシブルなプラスチックテープ22と、そのプラスチックテープ22の両面に別々に連続的に形成された金属膜23及び24と、プラスチックテープ22の両面を貫通するスルーホール25とよりなる構造である。プラスチックテープ22は、プラスチックテープ12の幅とほぼ同程度の幅で、かつ、長さが極めて長い所謂長尺のテープである。金属膜23及び24は、スルーホール25を介して互いに電気的に接続されている。また、スルーホール25は図2(b)では一つのみ示しているが、例えば一次元陰極基板31の長さ方向に適宜の間隔で複数設けられている。   The one-dimensional cathode substrate shown in FIG. 2A is a flexible metal tape 21 having the same width as the one-dimensional anode substrate 11 and at least one surface having a surface roughness of, for example, several nm or less. The metal tape 21 is used as a terminal of the cathode electrode and is used as a cap having a sealing structure. The one-dimensional cathode substrate shown in FIG. 2B penetrates the flexible plastic tape 22, the metal films 23 and 24 formed separately and continuously on both surfaces of the plastic tape 22, and both surfaces of the plastic tape 22. This is a structure comprising a through hole 25. The plastic tape 22 is a so-called long tape having a width substantially the same as the width of the plastic tape 12 and an extremely long length. The metal films 23 and 24 are electrically connected to each other through the through hole 25. Further, although only one through hole 25 is shown in FIG. 2B, a plurality of through holes 25 are provided at appropriate intervals in the length direction of the one-dimensional cathode substrate 31, for example.

なお、図2(b)のプラスチックテープ22の両面は、それぞれ例えば数nm以下の面粗さの平滑面に形成されている。また、後述する導電性接着層33が表面に設けられる平面は平滑面に形成する必要があるが、もう一方の表面は平滑面でなくてもよい。また、金属膜24のうち後述する絶縁性接着層34が被覆される部分のみ切り取っておいてもよい。   Note that both surfaces of the plastic tape 22 in FIG. 2B are formed on smooth surfaces having a surface roughness of, for example, several nm or less. In addition, a flat surface on which a conductive adhesive layer 33 described later is provided needs to be a smooth surface, but the other surface may not be a smooth surface. Moreover, you may cut out only the part coat | covered with the insulating adhesive layer 34 mentioned later among the metal films 24. FIG.

次に、一次元陽極基板11と一次元陰極基板による封止構造とを用いた本発明の有機EL発光ダイオードの一実施形態の構造について図3及び図4とともに説明する。   Next, the structure of an embodiment of the organic EL light emitting diode of the present invention using the one-dimensional anode substrate 11 and the sealing structure by the one-dimensional cathode substrate will be described with reference to FIGS.

図3は、一次元陰極基板を用いた封止構造の一例の断面図を示す。同図中、図2と同一構成部分には同一符号を付してある。図3に示す封止構造は、図2(b)に示した構造の一次元陰極基板31と、一次元陰極基板31の平滑面側32に形成された電極膜24の幅方向中央部に電極膜24の幅(電極幅)よりも狭い幅で形成された導電性接着層33と、電極膜24の幅方向両端部に導電性接着層33と重ならないように形成された絶縁性接着層34とからなる。平滑面側32は、一次元陰極基板31のプラスチックテープ22の平滑面側を意味する。なお、図3は一次元陰極基板として図2(b)に示した構造の一次元陰極基板を用いたが、図2(a)の構造の一次元陰極基板を用いても封止構造は図3と同様にテープ平滑面側に導電性接着層と絶縁性接着層とが形成された構造になる。   FIG. 3 shows a cross-sectional view of an example of a sealing structure using a one-dimensional cathode substrate. In the figure, the same components as those in FIG. The sealing structure shown in FIG. 3 has an electrode in the center in the width direction of the one-dimensional cathode substrate 31 having the structure shown in FIG. 2B and the electrode film 24 formed on the smooth surface side 32 of the one-dimensional cathode substrate 31. The conductive adhesive layer 33 formed with a width narrower than the width of the film 24 (electrode width) and the insulating adhesive layer 34 formed so as not to overlap the conductive adhesive layer 33 at both ends in the width direction of the electrode film 24. It consists of. The smooth surface side 32 means the smooth surface side of the plastic tape 22 of the one-dimensional cathode substrate 31. In FIG. 3, the one-dimensional cathode substrate having the structure shown in FIG. 2B is used as the one-dimensional cathode substrate. However, even if the one-dimensional cathode substrate having the structure shown in FIG. 3, the structure is such that a conductive adhesive layer and an insulating adhesive layer are formed on the tape smooth surface side.

図4は、本発明に係る有機EL発光ダイオードの一実施形態の断面図を示す。同図中、図1〜図3と同一構成部分には同一符号を付し、その説明を省略する。図4に示す有機EL発光ダイオード40は、図1に示した一次元陽極基板11上に形成された陰極電極17の表面に、図3に示した封止構造の導電性接着層33を、例えば真空内加圧により圧着し接合した構造である。図4において、導電性接着層41は図3に示した封止構造の導電性接着層33が上記圧着により変形した接着層である。また、図3に示した封止構造の絶縁性接着層34は、上記圧着により一次元陽極基板11の端部の構造に倣って変形し、図4のシール部42を構成する。   FIG. 4 shows a cross-sectional view of an embodiment of an organic EL light emitting diode according to the present invention. In the figure, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals, and the description thereof is omitted. An organic EL light emitting diode 40 shown in FIG. 4 has a conductive adhesive layer 33 having a sealing structure shown in FIG. 3 on the surface of the cathode electrode 17 formed on the one-dimensional anode substrate 11 shown in FIG. It is a structure that is bonded by pressure bonding in a vacuum. In FIG. 4, the conductive adhesive layer 41 is an adhesive layer obtained by deforming the conductive adhesive layer 33 having the sealing structure shown in FIG. Further, the insulating adhesive layer 34 having the sealing structure shown in FIG. 3 is deformed following the structure of the end portion of the one-dimensional anode substrate 11 by the above-described pressure bonding, and constitutes the seal portion 42 of FIG.

これにより、導電性接着層41により一次元陽極基板11の陰極電極17は一次元陰極基板31の金属膜23、24に電気的に接続される。また、これと同時に、陰極電極17及び有機EL層16はシール部42と導電性接着層41とにより封止される。接合する面は一次元陽極基板11、一次元陰極基板31ともに例えば数nm以下の面精度で仕上げているので、接合部分は原理的には完全密着している。なお、グラフェン膜14は周知の様に完全にフレキシブルで、かつ、酸素の完全遮断膜である。従って、グラフェン膜14を透明電極として用いることによって、パッシベーションとフレキシビリティを同時に確保できる。   Thereby, the cathode electrode 17 of the one-dimensional anode substrate 11 is electrically connected to the metal films 23 and 24 of the one-dimensional cathode substrate 31 by the conductive adhesive layer 41. At the same time, the cathode electrode 17 and the organic EL layer 16 are sealed by the seal portion 42 and the conductive adhesive layer 41. Since the surfaces to be joined are finished with a surface accuracy of, for example, several nanometers or less for both the one-dimensional anode substrate 11 and the one-dimensional cathode substrate 31, the joining portions are completely in principle in close contact. As is well known, the graphene film 14 is completely flexible and is a complete oxygen blocking film. Therefore, by using the graphene film 14 as a transparent electrode, passivation and flexibility can be ensured at the same time.

長尺の線状有機EL発光ダイオードである本実施形態の有機EL発光ダイオード40によれば、一次元陽極基板11の側面にグラフェン膜14と電気的接触をする金属電極15を設けたことにより、有機発光ダイオードの輝度傾斜が無くなり、任意の面積の照明装置を構成することが可能となる。また、金属膜23、24で被覆した一次元陰極基板31は、有機EL層16をグラフェン膜14との間にサンドイッチし、封止構造として高い信頼性を確保できる上、放熱板としての役割も果たす。更に、本実施形態の有機EL発光ダイオード40は、長尺のテープで連続した電極構造を有しており、その長尺のテープを任意の長さに切断し、任意の場所から端子を取り出す事が可能である。   According to the organic EL light emitting diode 40 of the present embodiment, which is a long linear organic EL light emitting diode, by providing the metal electrode 15 in electrical contact with the graphene film 14 on the side surface of the one-dimensional anode substrate 11, The luminance gradient of the organic light emitting diode is eliminated, and an illumination device having an arbitrary area can be configured. In addition, the one-dimensional cathode substrate 31 covered with the metal films 23 and 24 sandwiches the organic EL layer 16 between the graphene film 14 to ensure high reliability as a sealing structure and also serves as a heat sink. Fulfill. Furthermore, the organic EL light emitting diode 40 of the present embodiment has an electrode structure that is continuous with a long tape, and the long tape is cut into an arbitrary length and a terminal is taken out from an arbitrary place. Is possible.

次に、本発明の有機EL照明装置の実施形態について説明する。本発明の有機EL照明装置は、以下説明するように、図4に示したような断面構造の薄型でフレキシブルな構造の線状の本発明の有機EL発光ダイオードを構成単位とするので、平面及び任意の曲面からなる照明体を構成することが可能となり、デザイン自由度の問題が解決される。
図5(a)〜(c)は、上記本発明の有機EL発光ダイオードを用いた本発明に係る有機EL照明装置の各実施形態の平面図を示す。
Next, an embodiment of the organic EL lighting device of the present invention will be described. As will be described below, the organic EL lighting device of the present invention includes the linear organic EL light emitting diode of the present invention having a thin and flexible cross-sectional structure as shown in FIG. An illuminating body having an arbitrary curved surface can be configured, and the problem of design freedom is solved.
FIGS. 5A to 5C are plan views of embodiments of the organic EL lighting device according to the present invention using the organic EL light emitting diode of the present invention.

図5(a)は、本発明の有機EL照明装置の第1の実施形態の平面図を示す。同図(a)において、本実施形態の有機EL照明装置51Aは、線状白色発光体52が、長手方向に平行に10本(本数はこれに限定されない)配置された(並列に配列された)照明体を備える構成である。線状白色発光体52のそれぞれは、図4に示した断面構造の線状の有機EL発光ダイオード40を、テープ長手方向(図4の紙面に対して直交する方向)において適当な長さに切り取った発光体で、有機EL層16が白色を発光する構造である。また、各線状白色発光体52の陰極端子は任意の位置にとれるが、ここでは端部に設けて配線53−1で共通に接続している。更に、各線状白色発光体52の陽極端子は一次元陽極基板11の側面の金属電極15から任意の位置から取り出せるが、ここでは端部に設けて配線54で共通に接続している。なお、陽極端子の取り出し法は種々考えられるが、比較的自明な構造体であるので、ここでは示さない。   Fig.5 (a) shows the top view of 1st Embodiment of the organic electroluminescent illuminating device of this invention. In FIG. 5A, in the organic EL lighting device 51A of the present embodiment, 10 linear white light emitters 52 (the number is not limited to this) are arranged in parallel in the longitudinal direction (arranged in parallel). ) A configuration including an illuminating body. Each of the linear white light emitters 52 is obtained by cutting the linear organic EL light emitting diode 40 having the cross-sectional structure shown in FIG. 4 to an appropriate length in the tape longitudinal direction (direction perpendicular to the paper surface of FIG. 4). In this structure, the organic EL layer 16 emits white light. Further, the cathode terminals of the respective linear white light emitters 52 can be taken at arbitrary positions, but here, they are provided at the end portions and commonly connected by the wiring 53-1. Further, the anode terminal of each linear white light emitter 52 can be taken out from an arbitrary position from the metal electrode 15 on the side surface of the one-dimensional anode substrate 11, but here, it is provided at the end portion and commonly connected by the wiring 54. Various methods for taking out the anode terminal are conceivable, but since it is a relatively obvious structure, it is not shown here.

図5(b)は、本発明の有機EL照明装置の第2の実施形態の平面図を示す。同図(b)において、本実施形態の有機EL照明装置51Bは、線状青色発光体55と線状黄色(又は橙色)発光体56とを交互に長手方向に平行に配置された照明体を備える構成である。線状青色発光体55及び線状黄色(又は橙色)発光体56はそれぞれ図4に示した断面構造の線状の有機EL発光ダイオード40を、テープ長手方向(図4の紙面に対して直交する方向)において適当な長さに切り取った発光体で、線状青色発光体55は有機EL層16が青色を発光し、線状黄色(又は橙色)発光体56は有機EL層16が青色の補色である黄色(又は橙色)を発光する構造である。   FIG.5 (b) shows the top view of 2nd Embodiment of the organic electroluminescent illuminating device of this invention. In FIG. 5B, the organic EL lighting device 51B of the present embodiment includes an illuminating body in which linear blue light emitters 55 and linear yellow (or orange) light emitters 56 are alternately arranged in parallel in the longitudinal direction. It is the composition provided. The linear blue light-emitting body 55 and the linear yellow (or orange) light-emitting body 56 are formed by connecting the linear organic EL light-emitting diodes 40 having the cross-sectional structure shown in FIG. 4 in the longitudinal direction of the tape (perpendicular to the paper surface of FIG. The linear blue light emitter 55 emits blue light from the organic EL layer 16, and the linear yellow (or orange) light emitter 56 is complementary to the organic EL layer 16 in blue. This is a structure that emits yellow (or orange) light.

また、線状青色発光体55及び線状黄色(又は橙色)発光体56の各陰極端子は端部に設けられ配線53−2に共通に接続されている。また、線状青色発光体55の各陽極端子は端部に設けられ配線57−1に接続され、線状黄色(又は橙色)発光体56の各陽極端子は端部に設けられ配線57−2に接続されている。本実施形態の有機EL照明装置51Bは、1本の線状青色発光体55と1本の線状黄色(又は橙色)発光体56とをペアとして発光させ、青色光と黄色(又は橙色)光との混色により全体として白色を発光させる構成で、別々の配線57−1と57−2によって通電し、色温度の調整を図る。   In addition, each cathode terminal of the linear blue light emitter 55 and the linear yellow (or orange) light emitter 56 is provided at an end portion and commonly connected to the wiring 53-2. Also, each anode terminal of the linear blue light emitter 55 is provided at the end and connected to the wiring 57-1, and each anode terminal of the linear yellow (or orange) light emitter 56 is provided at the end and the wiring 57-2. It is connected to the. The organic EL lighting device 51B of this embodiment causes one linear blue light emitter 55 and one linear yellow (or orange) light emitter 56 to emit light as a pair, and blue light and yellow (or orange) light. In this configuration, white color is emitted as a whole by color mixing, and power is supplied through separate wirings 57-1 and 57-2 to adjust the color temperature.

図5(c)は、本発明の有機EL照明装置の第3の実施形態の平面図を示す。同図(c)において、本実施形態の有機EL照明装置51Cは、長手方向に平行な線状赤色発光体58Rと線状緑色発光体58Gと線状青色発光体58Bの3本を一組として組単位に並列に配列された照明体を備える構成である。線状赤色発光体58Rと線状緑色発光体58Gと線状青色発光体58Bとは、それぞれ図4に示した断面構造の線状の有機EL発光ダイオード40を、テープ長手方向(図4の紙面に対して直交する方向)において適当な長さに切り取った発光体で、線状赤色発光体58Rは有機EL層16が赤色を発光し、線状緑色発光体58Gは有機EL層16が緑色を発光し、線状青色発光体58Bは有機EL層16が青色を発光する構造である。   FIG.5 (c) shows the top view of 3rd Embodiment of the organic electroluminescent illuminating device of this invention. In FIG. 5C, the organic EL lighting device 51C according to the present embodiment includes three sets of a linear red light emitter 58R, a linear green light emitter 58G, and a linear blue light emitter 58B that are parallel to the longitudinal direction. It is the structure provided with the illumination body arranged in parallel by the group unit. The linear red light-emitting body 58R, the linear green light-emitting body 58G, and the linear blue light-emitting body 58B are respectively arranged in the tape longitudinal direction (the paper surface of FIG. 4) with the linear organic EL light-emitting diode 40 having the cross-sectional structure shown in FIG. The linear red light emitter 58R emits red light from the organic EL layer 16 and the linear green light emitter 58G emits green light from the organic EL layer 16 in a direction perpendicular to the light source. The linear blue light emitter 58B has a structure in which the organic EL layer 16 emits blue light.

また、線状赤色発光体58Rと線状緑色発光体58Gと線状青色発光体58Bの各陰極端子は端部に設けられ配線53−3に共通に接続されている。また、線状赤色発光体58Rの各陽極端子は端部に設けられ配線59−1に接続され、線状緑色発光体58Gの各陽極端子は端部に設けられ配線59−2に接続され、線状青色発光体58Bの各端子も端部に設けられ配線59−3に接続されている。本実施形態の有機EL照明装置51Cは、線状赤色発光体58Rと線状緑色発光体58Gと線状青色発光体58Bの3本を一組として組単位で発光させ、それら一組の赤色光と緑色光と青色光との混色により全体として白色を発光させる構成で、別々の配線59−1と59−2と59−3によって各色独立に通電し、色温度及び色相の調整を図る。それぞれの色の細い線状色発光体の配列によって、色の混合を起こして任意の色相を表示することは、陰極線管(CRT)、液晶表示パネルなどのようなディスプレイのカラー画像表示原理と同じ周知の加法混色の原理に基づく。   Further, the cathode terminals of the linear red light emitter 58R, the linear green light emitter 58G, and the linear blue light emitter 58B are provided at the end portions and commonly connected to the wiring 53-3. Also, each anode terminal of the linear red light emitter 58R is provided at the end and connected to the wiring 59-1, and each anode terminal of the linear green light emitter 58G is provided at the end and connected to the wiring 59-2. Each terminal of the linear blue light emitter 58B is also provided at the end and connected to the wiring 59-3. The organic EL lighting device 51C according to the present embodiment emits light in units of three sets of the linear red light emitter 58R, the linear green light emitter 58G, and the linear blue light emitter 58B, and sets the red light. In this configuration, white light is emitted as a whole by mixing colors of green light and blue light, and each color is independently energized through separate wirings 59-1, 59-2, and 59-3 to adjust the color temperature and hue. It is the same as the color image display principle of a display such as a cathode ray tube (CRT), a liquid crystal display panel, etc., to display an arbitrary hue by causing color mixing by the arrangement of thin linear color light emitters of each color. Based on the well-known additive color mixing principle.

現行の有機EL発光ダイオードを照明装置に適用した場合、強度を変化させる調光機能を持つが色調を調整することができない。これに対し、上記の本発明の有機EL照明装置の各実施形態51A、51B、51Cは、複数の線状色発光体の各々の調光・調色が可能であり、前述した演色性の問題を解決でき、白色の色温度の調整、更には任意の色調を実現する照明装置を提供できる。   When the current organic EL light emitting diode is applied to a lighting device, it has a dimming function for changing the intensity, but the color tone cannot be adjusted. On the other hand, each of the embodiments 51A, 51B, 51C of the organic EL lighting device of the present invention described above is capable of dimming / toning each of the plurality of linear color light emitters, and the aforementioned color rendering problem. Thus, it is possible to provide a lighting device that can adjust the color temperature of white and realize an arbitrary color tone.

また、上記の本発明の有機EL照明装置の各実施形態51A、51B、51Cは、複数本の線状色発光体(有機EL発光ダイオード)を並列に配列したフレキシブルな構成であるため、薄型・フレキシブリティの問題を解決できるとともに、その外観形状が線状や平面状に限らず、図6(a)〜(d)に示すような任意の曲面状に成形することが可能となり、デザイン自由度の問題が解決される。   In addition, each of the embodiments 51A, 51B, 51C of the organic EL lighting device of the present invention has a flexible configuration in which a plurality of linear color light emitters (organic EL light emitting diodes) are arranged in parallel. In addition to solving the problem of flexibility, the external shape is not limited to a linear or planar shape, and it can be formed into an arbitrary curved surface as shown in FIGS. The problem is solved.

図6(a)は、全体をスパイラル状に曲げて構成した円筒形状の有機EL照明装置61の概略外観図を示す。図6(b)は、全体をスパイラル状に曲げて構成した円錐形状の有機EL照明装置62の概略外観図を示す。図6(c)は、線状色発光体であるn個の本発明の有機EL発光ダイオード63−1〜63−nを竹ひご細工風に組み上げて、全体として壺型とした有機EL照明装置64の概略外観図を示す。図6(d)は、直線状にした本発明の有機EL発光ダイオードを、65−1〜65−mに示すように縦方向にm本、66−1〜66−kで示すよう横方向にk本を交互に、織機により平織りした構成の有機EL照明装置62の概略外観図を示す。   FIG. 6A shows a schematic external view of a cylindrical organic EL lighting device 61 constructed by bending the whole into a spiral shape. FIG. 6B shows a schematic external view of a conical organic EL lighting device 62 constructed by bending the whole into a spiral shape. FIG. 6 (c) shows an organic EL lighting device in which n organic EL light-emitting diodes 63-1 to 63-n of the present invention, which are linear color light emitters, are assembled in a bamboo garnish style to form a bowl shape as a whole. 64 is a schematic external view. FIG. 6 (d) shows the organic EL light-emitting diodes of the present invention, which are linear, in the vertical direction as indicated by 65-1 to 65-m and in the horizontal direction as indicated by 66-1 to 66-k. The schematic external view of the organic electroluminescent illuminating device 62 of the structure which carried out the plain weaving by the loom alternately k pieces is shown.

次に、本発明の有機EL照明装置の等価回路構成について説明する。図7は、本発明に係る有機EL照明装置の一実施形態の等価回路図を示す。同図において、有機EL発光ダイオード71は、制御回路72を介して電流源73に接続されている。制御回路72はMOSトランジスタTr1〜Tr4とコンデンサC1とからなる。直流電圧源74は電源スイッチ75を介してMOSトランジスタTr1及びTr2の各ゲートに接続されるとともに、電源スイッチ75及び可変抵抗器76を介してMOSトランジスタTr1及びTr2の各ドレインに接続されている。   Next, an equivalent circuit configuration of the organic EL lighting device of the present invention will be described. FIG. 7 shows an equivalent circuit diagram of an embodiment of the organic EL lighting device according to the present invention. In the figure, an organic EL light emitting diode 71 is connected to a current source 73 via a control circuit 72. The control circuit 72 includes MOS transistors Tr1 to Tr4 and a capacitor C1. The DC voltage source 74 is connected to the gates of the MOS transistors Tr1 and Tr2 through the power switch 75, and is connected to the drains of the MOS transistors Tr1 and Tr2 through the power switch 75 and the variable resistor 76.

制御回路72は電源スイッチ75がオンとされると、MOSトランジスタTr1及びTr2の各ゲートに直流電圧源74からの直流電圧が印加されてそれぞれ動作状態となり、電流源73からの電流により有機EL発光ダイオード71を駆動する。このときの駆動電流は、制御回路72に供給される可変抵抗器46の抵抗値に応じたレベルの制御電圧に応じて電流値が変化する。これにより、有機EL発光ダイオード71は、可変抵抗器46の抵抗値に応じて輝度が変化する。従って、有機EL発光ダイオード71が白色発光体からなる場合は、可変抵抗器76により輝度を0〜100%まで調光することができる。   When the power switch 75 is turned on, the control circuit 72 is activated by applying a DC voltage from the DC voltage source 74 to the gates of the MOS transistors Tr1 and Tr2. The organic EL light emission is caused by the current from the current source 73. The diode 71 is driven. The drive current at this time changes in current value according to a control voltage at a level corresponding to the resistance value of the variable resistor 46 supplied to the control circuit 72. Thereby, the luminance of the organic EL light emitting diode 71 changes according to the resistance value of the variable resistor 46. Therefore, when the organic EL light emitting diode 71 is made of a white light emitter, the brightness can be adjusted to 0 to 100% by the variable resistor 76.

なお、有機EL発光ダイオードが補色の関係にある2種類の色発光体からなる場合は制御回路72及び可変抵抗器76を2回路設け、三原色の関係にある3種類の色発光体からなる場合は制御回路72及び可変抵抗器76を3回路設けることにより、色調と輝度を任意に調整することが可能である。   When the organic EL light emitting diode is composed of two types of color light emitters having a complementary color relationship, two circuits of the control circuit 72 and the variable resistor 76 are provided, and when the organic EL light emitting diode is composed of three types of color light emitters having a relationship of three primary colors. By providing three circuits of the control circuit 72 and the variable resistor 76, it is possible to arbitrarily adjust the color tone and the luminance.

次に、本発明の有機EL発光ダイオードの製造方法の実施例について説明する。
まず、透明でフレキシブルなプラスチックテープとして、厚さ100μm、幅600mmで両面が平滑面とされたロール状COP(シクロオレフィンポリマー)フィルムを用意し、そのCOPフィルムの片面全面にCOPフィルムと同じ幅の2層のグラフェン膜をロール・ツウ・ロールで連続的に接着する。続いて、グラフェン膜が接着されたロール状のCOPフィルムを、5mm幅でスリッティングし、図1のプラスチックテープ12、接着層13及びグラフェン膜14からなるテープ部分を得る。
Next, the Example of the manufacturing method of the organic electroluminescent light emitting diode of this invention is described.
First, as a transparent and flexible plastic tape, a roll-shaped COP (cycloolefin polymer) film having a thickness of 100 μm, a width of 600 mm, and smoothed on both sides is prepared, and the COP film has the same width as that of the COP film on one entire surface. Two layers of graphene films are continuously bonded by roll-to-roll. Subsequently, the roll-shaped COP film to which the graphene film is bonded is slit to a width of 5 mm to obtain a tape portion including the plastic tape 12, the adhesive layer 13, and the graphene film 14 of FIG.

続いて、上記テープ部分の厚さ100μmの両側面にそれぞれ公知のメッキ方法により厚さ2μmの銅膜を前記金属電極15として形成して一次元陽極基板11上にグラフェン膜が形成された構造を製造する。なお、上記公知のメッキ方法としては、文献(「シクロオレフィンポリマーへの平滑回路形成」 エレクトロニクス実装学会誌 Vol.10 No.3 229-233(2007))に記載された方法を用いることができる。このようにして得られたグラフェン膜の抵抗値は100Ω/□であるが、金属電極15としての銅膜部分の抵抗値は50Ω/mで、テープ長さ方向数mに亘って目視では輝度傾斜は認められなかった。   Then, a structure in which a graphene film is formed on the one-dimensional anode substrate 11 by forming a copper film having a thickness of 2 μm as the metal electrode 15 by a known plating method on both sides of the tape portion having a thickness of 100 μm. To manufacture. In addition, as the known plating method, a method described in a literature (“Formation of a smooth circuit on a cycloolefin polymer”, Journal of Electronics Packaging Society Vol.10 No.3 229-233 (2007)) can be used. The resistance value of the graphene film thus obtained is 100Ω / □, but the resistance value of the copper film portion as the metal electrode 15 is 50Ω / m, and the luminance gradient is visually observed over several m in the tape length direction. Was not recognized.

次に、グラフェン膜上に有機EL層が形成される。有機EL層の構成は正孔輸送層-発光層-電子輸送層の三層構造で、正孔輸送層はPEDOT-PSSまたはPVK(poly(N-vinylcarbazole))マトリックスにTPD(N,N7-diphenyl-N,N'-bis(3 methylphenyl)-1,1'-biphenyl-4,4'-diamine)をドープしたもの、電子輸送層はPBD(2-(4-biphenyl)-5-(4-tert-butylphenyl)1,3,4-oxadiazole)をPMMA(poly(methyl methacrylate))にドープしたものである。発光層のマトリックス材はPVKを用い、三原色を混合した白色発光体である。赤色発光層はIr(piq)(iridium bis(1-phenylisoquinoline)(acetylacetonato))、緑色発光層はIr(mppy)3(iridium tris(2-(4-tolyl)pyridinato-N,C2’))、青色発光層はFIpic(iridium bis(2-(4,6-difluorophenyl)-pyridinato-N,C2’)picolinate)を用いた。 Next, an organic EL layer is formed on the graphene film. The structure of the organic EL layer is a three-layer structure consisting of a hole transport layer, a light-emitting layer, and an electron transport layer. The hole transport layer is composed of PEDOT-PSS or PVK (poly (N-vinylcarbazole)) matrix and TPD (N, N7-diphenyl). -N, N'-bis (3 methylphenyl) -1,1'-biphenyl-4,4'-diamine) doped, the electron transport layer is PBD (2- (4-biphenyl) -5- (4- tert-butylphenyl) 1,3,4-oxadiazole) doped with PMMA (poly (methyl methacrylate)). The matrix material of the light emitting layer is PVK and is a white light emitting material in which three primary colors are mixed. The red light emitting layer is Ir (piq) (iridium bis (1-phenylisoquinoline) (acetylacetonato)), and the green light emitting layer is Ir (mppy) 3 (iridium tris (2- (4-tolyl) pyridinato-N, C 2 ' )) For the blue light emitting layer, FIpic (iridium bis (2- (4,6-difluorophenyl) -pyridinato-N, C 2 ′ ) picolinate) was used.

図1の有機EL層16の形成は、前述の一次元陽極基板上に形成されたグラフェン膜の上全面にダイコーターによって正孔輸送層であるPEDOT-PSSを塗布した後、発光層、電子輸送層の順で各膜の乾燥後塗布して行われる。続いて、有機EL層16の上に、有機EL層より幅の狭い陰極電極17が蒸着等の公知の方法で長手方向に連続的に形成される。   The organic EL layer 16 shown in FIG. 1 is formed by applying PEDOT-PSS, which is a hole transport layer, to the entire surface of the graphene film formed on the above-described one-dimensional anode substrate using a die coater, and then emitting a light emitting layer and an electron It is performed by applying after drying each film in the order of layers. Subsequently, a cathode electrode 17 having a narrower width than the organic EL layer is continuously formed on the organic EL layer 16 in a longitudinal direction by a known method such as vapor deposition.

一方、一次元陰極基板用のプラスチックテープとして、厚み20μm、幅1000mmで両面が平滑面とされ、更にその両面の幅方向に5mmの間隔で、かつ、長手方向に例えば5×20mmの間隔でスルーホールが複数穿設されたロール状のCOPフィルムを用意する。続いて、そのロール状のCOPフィルムの両面に対して、銅膜が5μmの膜厚で公知の方法でめっきされることにより、両面にそれぞれ図2(b)に示した金属膜23、24が形成される。なお、スルーホールを通して上記の金属膜(銅膜)23、24の導通が取られている。これを5mm幅にスリッティングし、両側面に0.5μmの銅めっきをしたものを一次元陰極基板として製造する。上記スルーホールは5mm幅のスリッティング後のフィルムの幅方向の中央部に穿設されている。   On the other hand, as a plastic tape for a one-dimensional cathode substrate, both sides are smooth with a thickness of 20 μm and a width of 1000 mm, and further, the width of the both surfaces is 5 mm apart and the longitudinal direction is, for example, 5 × 20 mm apart. A roll-shaped COP film having a plurality of holes is prepared. Subsequently, a copper film is plated with a thickness of 5 μm on both sides of the roll-shaped COP film by a known method, so that the metal films 23 and 24 shown in FIG. It is formed. The metal films (copper films) 23 and 24 are electrically connected through the through holes. This is slitted to a width of 5 mm, and 0.5 μm copper plated on both sides is manufactured as a one-dimensional cathode substrate. The through hole is formed at the center in the width direction of the film after slitting with a width of 5 mm.

次に、線状の有機EL発光ダイオードの製造方法の一例について説明する。図8は、本発明に係る有機EL発光ダイオードの製造装置の一例の構成図を示す。図8において、例えば図2(b)の構造で前述したロール状COPフィルムに形成された長尺の一次元陰極基板81は、繰り出し機から繰り出されて接着層形成部82により図3の断面構造のように平滑面側の幅中央部に導電性接着層が形成されると共に幅端部に絶縁性接着層が形成された後、差動排気系83aを通って真空接合機84に導入される。   Next, an example of a method for manufacturing a linear organic EL light emitting diode will be described. FIG. 8 shows a configuration diagram of an example of an apparatus for manufacturing an organic EL light emitting diode according to the present invention. In FIG. 8, for example, the long one-dimensional cathode substrate 81 formed on the above-described roll-shaped COP film in the structure of FIG. 2B is fed out from the feeding machine and the cross-sectional structure of FIG. In this way, a conductive adhesive layer is formed at the center of the width on the smooth surface side and an insulating adhesive layer is formed at the end of the width, and then introduced into the vacuum bonding machine 84 through the differential exhaust system 83a. .

一方、例えば前述したロール状COPフィルムに形成された一次元陽極基板11とグラフェン膜14と有機EL層16と陰極電極17とからなる図1の構造の長尺の線状の陽極基板側構造体86が、マイクロプラズマ洗浄機87により洗浄された後、差動排気系83bを通って真空接合機84に導入される。真空接合機84は真空室内にて導入された2つの構造体の位置合わせをした後、ローラ85a、85bで模式的に示した圧着部により圧着接合し図4の断面図に示したような封止構造を有する有機EL発光ダイオードを製造する。その後、真空接合機84から室外に取り出された有機EL発光ダイオード88は、差動排気系83cを通って巻取機89に巻き取られる。   On the other hand, for example, a long linear anode substrate side structure of the structure of FIG. 1 comprising the one-dimensional anode substrate 11, the graphene film 14, the organic EL layer 16, and the cathode electrode 17 formed on the roll-shaped COP film described above. 86 is cleaned by the microplasma cleaning machine 87 and then introduced into the vacuum bonding machine 84 through the differential exhaust system 83b. The vacuum bonding machine 84 aligns the two structures introduced in the vacuum chamber, and then crimps and bonds them by the crimping portions schematically shown by the rollers 85a and 85b, and the sealing as shown in the sectional view of FIG. An organic EL light emitting diode having a stop structure is manufactured. Thereafter, the organic EL light-emitting diode 88 taken out from the vacuum bonding machine 84 is wound around the winder 89 through the differential exhaust system 83c.

なお、本発明は以上の実施形態に限定されるものではなく、例えば図5(b)に示した表面構造の有機EL照明装置は、青色、及び青色と補色関係にある黄色(又は橙色)の2色の線状色発光体を用いたが、これら以外の組み合わせの補色関係にある2色の線状色発光体を用いることもできる。また、プラスチックテープ12は、その平滑面上に無機膜とポリマー膜との交互多層構造の透明バリヤ層が積層されている構成であってもよい。   The present invention is not limited to the above embodiment. For example, the organic EL lighting device having the surface structure shown in FIG. 5B is blue and yellow (or orange) that is complementary to blue. Although two linear color light emitters are used, two color linear light emitters having a complementary color combination other than these may be used. Further, the plastic tape 12 may have a configuration in which transparent barrier layers having an alternating multilayer structure of an inorganic film and a polymer film are laminated on the smooth surface.

11 一次元陽極基板
12、22 プラスチックテープ
13 接着層
14 グラフェン膜
15 金属電極
16 有機EL層
17 陰極電極
21 金属テープ
23、24 金属膜
25 スルーホール
31、81 一次元陰極基板
32 平滑面側
33、41 導電性接着層
34 絶縁性接着層
40、63−1〜63−n、65−1〜65−m、66−1〜66−k、71、88 有機EL発光ダイオード
42 シール部
51A、51B、51C 有機EL照明装置の平面構造
52 線状白色発光体
53−1、53−2、53−3、54、57−1、57−2、59−1、59−2、59−3 配線
55、58B 線状青色発光体
56 線状黄色(又は橙色)発光体
58R 線状赤色発光体
58G 線状緑色発光体
61、62 有機EL照明装置
72 制御回路
73 電流源
74 直流電圧源
75 電源スイッチ
76 可変抵抗器
84 真空接合機
86 陽極基板側構造体
11 One-dimensional anode substrate 12, 22 Plastic tape 13 Adhesive layer 14 Graphene film 15 Metal electrode 16 Organic EL layer 17 Cathode electrode 21 Metal tape 23, 24 Metal film 25 Through hole 31, 81 One-dimensional cathode substrate 32 Smooth surface side 33, 41 conductive adhesive layer 34 insulating adhesive layer 40, 63-1 to 63-n, 65-1 to 65-m, 66-1 to 66-k, 71, 88 organic EL light emitting diode 42 seal part 51A, 51B, 51C Planar Structure of Organic EL Lighting Device 52 Linear White Light Emitter 53-1, 53-2, 53-3, 54, 57-1, 57-2, 59-1, 59-2, 59-3 Wiring 55, 58B Linear blue light emitter 56 Linear yellow (or orange) light emitter 58R Linear red light emitter 58G Linear green light emitter 61, 62 Organic EL lighting device 72 Control circuit 73 Electricity Source 74 DC voltage source 75 power switch 76 a variable resistor 84 a vacuum joining machine 86 anode substrate side structure

Claims (6)

透明でフレキシブルな長尺のプラスチックテープと、前記プラスチックテープの平滑面上全面に透明電極として形成された透光性を有し、かつ、フレキシブルな導電性フィルムと、前記プラスチックテープの側面に前記導電性フィルムと電気的接触をもって形成された金属電極とからなる線状でフレキシブルな一次元陽極基板と、
前記導電性フィルムの表面全面に連続的に形成された有機EL層と、
前記有機EL層上に前記有機EL層よりも狭い幅で連続的に形成された陰極電極と、
を有することを特徴とする有機EL発光ダイオード。
A transparent and flexible long plastic tape, a translucent and transparent conductive film formed as a transparent electrode on the entire smooth surface of the plastic tape, and the conductive film on the side surface of the plastic tape. A linear and flexible one-dimensional anode substrate comprising a conductive film and a metal electrode formed in electrical contact;
An organic EL layer continuously formed on the entire surface of the conductive film;
A cathode electrode continuously formed on the organic EL layer with a narrower width than the organic EL layer;
An organic EL light emitting diode comprising:
透明でフレキシブルな長尺の第1のプラスチックテープと、前記第1のプラスチックテープの平滑面上全面に透明電極として形成された透光性を有し、かつ、フレキシブルな導電性フィルムと、前記第1のプラスチックテープの側面に前記導電性フィルムと電気的接触をもって形成された金属電極とからなる線状でフレキシブルな一次元陽極基板と、
前記導電性フィルムの表面全面に連続的に形成された有機EL層と、
前記有機EL層上に前記有機EL層よりも狭い幅で連続的に形成された陰極電極と、
片面又は両面が平滑面とされた長尺の第2のプラスチックテープの両面に第1及び第2の金属膜が形成されるとともに、スルーホールを介して前記第1及び第2の金属膜が電気的に接続された長尺でフレキシブルな基板構造、又は少なくとも一面が平滑面である長尺の金属テープである基板構造の一次元陰極基板と、
を備え、前記一次元陰極基板の平滑側の表面において、前記一次元陰極基板の幅方向の中央部に形成された導電性接着層を介して前記陰極電極と前記一次元陰極基板の前記第1及び第2の金属膜又は前記金属テープとを電気的に接続するとともに、前記一次元陰極基板の幅方向の両端部に形成された絶縁性接着層により前記有機EL層及び前記導電性フィルムを封止する構造であることを特徴とする有機EL発光ダイオード。
A transparent and flexible first plastic tape, a translucent and flexible conductive film formed as a transparent electrode on the entire smooth surface of the first plastic tape, and the first A linear and flexible one-dimensional anode substrate comprising a metal electrode formed in electrical contact with the conductive film on the side surface of one plastic tape;
An organic EL layer continuously formed on the entire surface of the conductive film;
A cathode electrode continuously formed on the organic EL layer with a narrower width than the organic EL layer;
First and second metal films are formed on both sides of a long second plastic tape whose one side or both sides are smooth, and the first and second metal films are electrically connected via a through hole. One-dimensional cathode substrate that is a long and flexible substrate structure connected to each other, or a substrate structure that is a long metal tape having at least one smooth surface;
The cathode electrode and the first one of the one-dimensional cathode substrate via a conductive adhesive layer formed at the center in the width direction of the one-dimensional cathode substrate on the smooth side surface of the one-dimensional cathode substrate. And the second metal film or the metal tape, and the organic EL layer and the conductive film are sealed with insulating adhesive layers formed at both ends in the width direction of the one-dimensional cathode substrate. An organic EL light emitting diode characterized by having a structure to stop.
前記第2のプラスチックテープの平滑面側に形成された前記第1又は第2の金属膜の表面、又は前記金属テープの平滑面側の前記一次元陰極基板の表面において、前記一次元陰極基板の幅方向の中央部に形成された導電性接着層と、前記一次元陰極基板の幅方向の両端部に前記導電性接着層と重ならないように形成された絶縁性接着層とを、前記一次元陽極基板上に前記有機EL層を介して積層された前記陰極電極とを対向させて真空内加圧により接合し、前記導電接着層を介して前記陰極電極と前記第1及び第2の金属膜、又は前記金属テープとを電気的に接続するとともに、前記絶縁性接着層を前記一次元陽極基板の幅方向の両端部の構造に倣って変形させて前記有機EL層及び前記導電性フィルムのシール部として形成した構造であることを特徴とする請求項2記載の有機EL発光ダイオード。   On the surface of the first or second metal film formed on the smooth surface side of the second plastic tape, or on the surface of the one-dimensional cathode substrate on the smooth surface side of the metal tape, the one-dimensional cathode substrate A conductive adhesive layer formed at the center in the width direction; and an insulating adhesive layer formed so as not to overlap the conductive adhesive layer at both ends in the width direction of the one-dimensional cathode substrate. The cathode electrode laminated on the anode substrate via the organic EL layer is opposed to and bonded by pressurization in a vacuum, and the cathode electrode and the first and second metal films are bonded via the conductive adhesive layer. Alternatively, the organic EL layer and the conductive film are sealed by electrically connecting the metal tape and deforming the insulating adhesive layer following the structure of both end portions in the width direction of the one-dimensional anode substrate. It is a structure formed as a part Claim 2 wherein the organic EL light-emitting diode, wherein the door. 前記導電性フィルムは、グラフェンフィルムであることを特徴とする請求項1乃至3のうちいずれか一項記載の有機EL発光ダイオード。   The organic electroluminescent light emitting diode according to any one of claims 1 to 3, wherein the conductive film is a graphene film. 請求項2乃至4のうちいずれか一項記載の線状の有機EL発光ダイオードを、その長手方向における任意の長さで切り取った構造の線状色発光体が複数本並列に配列され、かつ、曲面状を含む任意の外観形状に成形された照明体と、
前記複数本の線状色発光体の発光輝度を制御する制御回路と、
を備え、
前記照明体は、前記線状色発光体として白色光を発光する白色発光体を複数本並列に配列した第1の構造、前記線状色発光体として互いに補色関係にある2種類の色光を別々に発光する2つの線状色発光体を一組として組単位で複数組並列に配列した第2の構造、及び三原色関係にある3種類の色光を別々に発光する3つの線状色発光体を一組として組単位で複数組並列に配列した第3の構造のうち、いずれか一の構造を有することを特徴とする有機EL照明装置。
A plurality of linear color light emitters having a structure obtained by cutting out the linear organic EL light emitting diode according to any one of claims 2 to 4 at an arbitrary length in a longitudinal direction thereof; and An illuminating body molded into an arbitrary external shape including a curved surface;
A control circuit for controlling the light emission luminance of the plurality of linear color light emitters;
With
The illuminator has a first structure in which a plurality of white light emitters that emit white light are arranged in parallel as the linear color light emitter, and two types of color lights that are complementary to each other as the linear color light emitter. A second structure in which two linear color light emitters that emit light in a single set are arranged in parallel as a set, and three linear color light emitters that separately emit three types of color light having three primary colors. An organic EL lighting device having any one of the third structures arranged in parallel as a set in a set unit.
前記制御回路は、前記照明体が前記第2の構造を有するときは前記2つの線状色発光体の輝度を互いに独立して制御し、前記照明体が前記第3の構造を有するときは前記3つの線状色発光体の輝度を互いに独立して制御することを特徴とする請求項5記載の有機EL照明装置。   The control circuit controls the luminance of the two linear color light emitters independently of each other when the illuminating body has the second structure, and when the illuminating body has the third structure, 6. The organic EL lighting device according to claim 5, wherein the luminances of the three linear color light emitters are controlled independently of each other.
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