JP2003051380A - Linear light source using organic electroluminescent device and method of manufacturing the same - Google Patents
Linear light source using organic electroluminescent device and method of manufacturing the sameInfo
- Publication number
- JP2003051380A JP2003051380A JP2001239345A JP2001239345A JP2003051380A JP 2003051380 A JP2003051380 A JP 2003051380A JP 2001239345 A JP2001239345 A JP 2001239345A JP 2001239345 A JP2001239345 A JP 2001239345A JP 2003051380 A JP2003051380 A JP 2003051380A
- Authority
- JP
- Japan
- Prior art keywords
- light source
- organic electroluminescent
- linear light
- substrate
- linear
- Prior art date
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Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
(57)【要約】
【課題】 有機電界発光素子を用いた線状光源を実現す
る。
【解決手段】 光源長手方向に沿って形成された線状自
発光領域が有機電界発光素子から構成された線状光源で
あって、素子基板１０上に有機電界発光素子２０が形成
され、この素子２０を覆った樹脂３０によって封止基板
４０が素子基板１０上に接着され、素子２０を封止す
る。封止後、ダイサーなどで素子基板１０と封止基板４
０とを光源の長辺に相当する位置で切断分離して各線状
光源１００を得る。分離された線状光源１００の素子基
板１０及び封止基板４０の長辺側面位置は一致する。
(57) [Summary] To provide a linear light source using an organic electroluminescent element. SOLUTION: A linear light source in which a linear self-luminous region formed along the longitudinal direction of the light source is constituted by an organic electroluminescent element, wherein an organic electroluminescent element 20 is formed on an element substrate 10; The sealing substrate 40 is adhered to the element substrate 10 by the resin 30 covering the element 20, and seals the element 20. After sealing, the element substrate 10 and the sealing substrate 4 are cut with a dicer or the like.
0 is cut and separated at a position corresponding to the long side of the light source to obtain each linear light source 100. The long side surfaces of the element substrate 10 and the sealing substrate 40 of the separated linear light source 100 coincide with each other.
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、有機電界発光素
子を用いた線状光源に関する。TECHNICAL FIELD The present invention relates to a linear light source using an organic electroluminescent device.
【０００２】[0002]
【従来の技術】液晶表示装置に採用されるバックライト
や、イメージセンサなどの光源として線状光源が求めら
れている。従来この線状光源としては、発光ダイオー
ド、タングステン球、冷陰極管又は熱陰極管などを用い
て構成したものが知られている。2. Description of the Related Art A linear light source is required as a light source for a backlight or an image sensor used in a liquid crystal display device. Conventionally, as this linear light source, one configured by using a light emitting diode, a tungsten bulb, a cold cathode tube, a hot cathode tube, or the like is known.
【０００３】しかし、タングステン球や、熱陰極管ある
いは冷陰極管を用いた線状光源は、光源の構成が複雑で
部品点数も多く、小型化、軽量化が困難である。例えば
液晶表示装置などでは、上記タングステン球などを用い
た線状光源を液晶表示装置の光源に採用したのでは、液
晶表示装置に対して強く要求される薄型化や軽量化など
を実現することができない。また、フルカラー液晶表示
装置では、白色の光源が求められるが、タングステン球
などを用いた白色の線状光源は上記同様薄型化、軽量化
そしてコストの面で問題がある。発光ダイオードを用い
た場合、発光ダイオード自体は軽量であるが発光輝度が
不十分であることや白色化の面でも問題がある。また、
発光ダイオードなどの点光源を組み合わせて面状或いは
線状光源を構成した場合、レンズや拡散板が必要とな
り、そして、これらを用いても面内での輝度ムラを完全
になくすことはできない。However, a linear light source using a tungsten bulb, a hot cathode tube or a cold cathode tube has a complicated light source structure and a large number of parts, and it is difficult to reduce the size and weight. For example, in a liquid crystal display device or the like, if a linear light source using the above-mentioned tungsten sphere or the like is adopted as a light source of the liquid crystal display device, it is possible to realize thinning and weight reduction which are strongly required for the liquid crystal display device. Can not. In addition, a white light source is required for a full-color liquid crystal display device, but a white linear light source using a tungsten sphere or the like has problems in thinning, weight saving, and cost similarly to the above. When a light emitting diode is used, the light emitting diode itself is lightweight, but there are problems in that the light emission brightness is insufficient and whitening occurs. Also,
When a surface light source or a linear light source is configured by combining point light sources such as light emitting diodes, a lens and a diffusion plate are required, and even if these are used, it is not possible to completely eliminate the uneven brightness in the surface.
【０００４】要求された面内で、均一かつ高輝度発光が
可能であって、その上、薄型化、軽量化を実現可能な発
光素子として、最近注目されている有機電界発光素子が
ある。有機電界発光素子は、陽極と陰極との間に少なく
とも発光層を含む有機層が積層された構造であり、陽極
と陰極との間に電流を流すことで陽極と陰極に挟まれた
発光層から光を放射させることができる。There is an organic electroluminescent element which has recently been attracting attention as a light emitting element capable of uniform and high-luminance light emission in a required plane and also capable of realizing thinning and weight reduction. The organic electroluminescent element has a structure in which an organic layer including at least a light emitting layer is laminated between an anode and a cathode, and a light emitting layer sandwiched between the anode and the cathode is formed by passing a current between the anode and the cathode. It can emit light.
【０００５】例えば特開平５−３４６９２号公報、特開
平１１−２０２７９９号公報には、有機電界発光素子を
液晶表示装置のバックライトとして採用した構成が開示
されている。For example, Japanese Unexamined Patent Publication No. 5-34692 and Japanese Unexamined Patent Publication No. 11-202799 disclose a structure in which an organic electroluminescent element is used as a backlight of a liquid crystal display device.
【０００６】[0006]
【発明が解決しようとする課題】しかし、これらの公報
には、有機電界発光素子の原理的な構造が開示されてい
るのみである。少なくとも有機層は外気、特に水分に晒
されることで発光不良を起こすため、開示されているよ
うな構造では、線状光源に限らず現実の装置に採用する
ことが技術的不可能であり、現実的でない。However, these publications only disclose the principle structure of the organic electroluminescence device. At least the organic layer causes light emission failure when exposed to the outside air, especially moisture, so that it is technically impossible to employ the disclosed structure not only in the linear light source but also in the actual device. Not relevant.
【０００７】本発明は、有機電界発光素子を用いた細長
い線状光源を実現し、また製造方法の確立を図ることを
目的とする。It is an object of the present invention to realize an elongated linear light source using an organic electroluminescence device and to establish a manufacturing method.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
にこの発明は、以下のような特徴を有する。In order to achieve the above object, the present invention has the following features.
【０００９】本発明において、光源長手方向に沿って形
成された線状自発光領域が有機電界発光素子から構成さ
れた線状光源であって、前記有機電界発光素子が形成さ
れた素子基板と、前記素子基板の前記有機電界発光素子
形成側に接着材料によって接着され前記有機電界発光素
子を封止する封止基板とを備え、前記素子基板と前記封
止基板とは、光源長辺において端面が一致する。In the present invention, a linear self-luminous region formed along the longitudinal direction of the light source is a linear light source composed of an organic electroluminescent element, and an element substrate on which the organic electroluminescent element is formed, A sealing substrate that seals the organic electroluminescent device by adhering to the organic electroluminescent device forming side of the device substrate with an adhesive material, and the device substrate and the sealing substrate have an end face on the long side of the light source. Match.
【００１０】本発明の他の態様は、光源長手方向に沿っ
て形成された線状自発光領域が有機電界発光素子から構
成された線状光源の製造方法であり、大型の素子基板上
の複数の線状光源形成領域にそれぞれ有機電界発光素子
を形成し、前記素子基板上に接着材料により複数の前記
有機電界発光素子を覆うように大型の封止基板を接着
し、前記有機電界発光素子を間に封止して接着された前
記素子基板と前記封止基板とを各線状光源の長辺に相当
する位置で切断し各線状光源を分離する。Another aspect of the present invention is a method for manufacturing a linear light source in which a linear self-luminous region formed along the longitudinal direction of the light source is composed of an organic electroluminescent element, and a plurality of elements are arranged on a large element substrate. Forming an organic electroluminescent element in each of the linear light source forming regions, and adhering a large sealing substrate on the element substrate with an adhesive material so as to cover the plurality of organic electroluminescent elements. The element substrate and the sealing substrate which are sealed and bonded between them are cut at positions corresponding to the long sides of the linear light sources to separate the linear light sources.
【００１１】このように線状光源の自発光領域を有機電
界発光素子によって構成することで、光源の薄型化や軽
量化を図ることができる。即ち、有機電界発光素子を構
成する電極や有機層は、全て合わせても１μｍにも満た
ない厚さであり、線状光源のサイズと重量は、その大半
が素子基板と封止基板の厚さと重量とで決まり、他の機
械的な構造が不要であるため、非常に薄くかつ軽量とす
ることができるのである。また、基板を薄くしたり、基
板材料にプラスチックを採用するなどにより、一層の軽
量化が可能である。By thus forming the self-luminous region of the linear light source by the organic electroluminescent element, it is possible to reduce the thickness and weight of the light source. That is, the electrodes and the organic layers that make up the organic electroluminescence device have a total thickness of less than 1 μm, and most of the size and weight of the linear light source are the same as those of the element substrate and the sealing substrate. Since it is determined by the weight and does not require any other mechanical structure, it can be made extremely thin and lightweight. Further, the weight can be further reduced by thinning the substrate or adopting plastic as the substrate material.
【００１２】本発明の他の態様において、前記線状自発
光領域を構成する前記有機電界発光素子の長短比は１０
対１以上であることを特徴とする。In another aspect of the present invention, the length-to-width ratio of the organic electroluminescent device forming the linear self-luminous region is 10.
It is characterized by being 1 or more.
【００１３】有機電界発光素子の発光領域のサイズは、
電極レイアウト、真空蒸着時に用いるシャドーマスク、
或いはレジストパターンなどによって決まり、そのサイ
ズや形状に関係なく、用途に合わせた有機材料を選択で
きる。従って、最適な有機材料を用いて有機電界発光素
子を形成することで高性能の線状光源を実現することが
可能となる。また、有機電界発光素子は、上記のように
所望のサイズ及びパターンとすることが可能な素子領域
全体を発光させることができるので、点光源をつなぎ合
わせたり、レンズや光拡散板を用いて擬似的に面光源や
線光源とする必要がない。このため、均一な線状の面発
光体を構成でき、輝度ムラのない光源を実現できる。The size of the light emitting region of the organic electroluminescent device is
Electrode layout, shadow mask used during vacuum deposition,
Alternatively, depending on the resist pattern and the like, an organic material can be selected according to the application regardless of its size or shape. Therefore, it is possible to realize a high-performance linear light source by forming an organic electroluminescent device using an optimum organic material. In addition, since the organic electroluminescent device can emit light over the entire device region that can be formed into a desired size and pattern as described above, it is possible to connect point light sources or use a lens or a light diffusing plate to simulate. Therefore, it is not necessary to use a surface light source or a line light source. Therefore, it is possible to form a uniform linear surface light-emitting body and to realize a light source without uneven brightness.
【００１４】本発明の他の態様において、前記有機電界
発光素子と前記接着材料である樹脂との間には前記有機
電界発光素子を覆う保護膜を備える。In another aspect of the present invention, a protective film covering the organic electroluminescent element is provided between the organic electroluminescent element and the resin as the adhesive material.
【００１５】このように有機電界発光素子を保護膜で覆
うことにより、外気や、水分、溶剤などが素子、特に有
機層に侵入することをより確実に防止することができ
る。また、駆動により生ずる素子での熱をこの保護膜を
介して樹脂及び封止基板から迅速な放熱を容易とするこ
とができ、熱による劣化が問題となる有機層を熱から保
護することが可能となる。By thus covering the organic electroluminescent device with the protective film, it is possible to more reliably prevent outside air, moisture, solvent, etc. from entering the device, particularly the organic layer. In addition, heat generated in the element due to driving can be easily radiated quickly from the resin and the sealing substrate through this protective film, and the organic layer, which is a problem of deterioration due to heat, can be protected from heat. Becomes
【００１６】本発明の他の態様において、前記素子基板
と前記有機電界発光素子との層間には、誘電体ミラーが
設けられ、該誘電体ミラーと前記有機電界発光素子とに
よって光共振器が構成されている。In another aspect of the present invention, a dielectric mirror is provided between the element substrate and the organic electroluminescent element, and the dielectric mirror and the organic electroluminescent element constitute an optical resonator. Has been done.
【００１７】このような光共振器を線状光源に内蔵する
ことにより、光源の特定方向、例えば、素子基板の素子
非形成側の面（有機電界発光素子前方）における光強度
を選択的に向上することができる。このため、特定方向
において高い輝度の要求される用途、例えばイメージセ
ンサの光源などにおいて、非常に有利である。By incorporating such an optical resonator in the linear light source, the light intensity in a specific direction of the light source, for example, the surface of the element substrate on which the element is not formed (in front of the organic electroluminescent element) is selectively improved. can do. Therefore, it is very advantageous in applications requiring high brightness in a specific direction, such as a light source of an image sensor.
【００１８】本発明の他の態様において、それぞれ異な
る色の光を発する複数の線状自発光領域を同一線状光源
中に備え、各線状自発光領域には対応する色を発光する
有機電界発光素子が形成されている。In another aspect of the present invention, a plurality of linear self-luminous regions each emitting light of a different color are provided in the same linear light source, and each linear self-luminous region emits a corresponding color. The element is formed.
【００１９】各領域の有機電界発光素子の形成にあたり
求められる発光色に応じた発光材料等を選択すれば、単
一光源内に複数の所望の色を発する領域（有機電界発光
素子）を形成することができる。例えば、赤、緑、青の
発光を示す有機電界発光素子を形成することで、白色光
の他、任意の色の光を得ることができる。また、赤、
緑、青の各色について適切な色純度の光を得ることがで
きるように有機電界発光素子を形成し、また各素子の駆
動を制御すれば色再現性に優れた白色を得ることもでき
る。By selecting a light emitting material or the like according to the emission color required for forming the organic electroluminescent device in each region, a region (organic electroluminescent device) emitting a plurality of desired colors is formed in a single light source. be able to. For example, by forming an organic electroluminescent element that emits red, green, and blue light, in addition to white light, light of any color can be obtained. Also red,
It is also possible to obtain a white color excellent in color reproducibility by forming an organic electroluminescent element so as to obtain light having an appropriate color purity for each of green and blue and controlling the driving of each element.
【００２０】本発明の他の態様において、前記有機電界
発光素子の発光層材料として下記一般式（ｉ）In another embodiment of the present invention, the following general formula (i) is used as the light emitting layer material of the organic electroluminescent device.
【化３】 に示されるピレン誘導体化合物が用いられている。[Chemical 3] The pyrene derivative compound shown in is used.
【００２１】このようなピレン誘導体化合物を採用する
ことで長寿命の発光素子が実現され、また高輝度で、高
色純度の例えば青色の光を得ることができる。By using such a pyrene derivative compound, a light-emitting device having a long life can be realized, and high-luminance, high-color-purity, for example, blue light can be obtained.
【００２２】本発明の他の態様において、前記有機電界
発光素子の発光層材料として下記一般式（ｉｉ）In another embodiment of the present invention, as a light emitting layer material of the organic electroluminescent device, the following general formula (ii) is used.
【化４】
に示されるジビニルキノリン誘導体化合物が用いられて
いる。[Chemical 4] The divinylquinoline derivative compound shown in is used.
【００２３】このようなジビニルキノリン誘導体化合物
を採用することにより、長寿命の発光素子が実現され、
また高輝度で、高色純度の例えば赤色の光を得ることが
できる。By adopting such a divinylquinoline derivative compound, a long-lifetime light emitting device is realized,
Further, for example, red light having high brightness and high color purity can be obtained.
【００２４】本発明の他の態様において、前記有機電界
発光素子は透明電極及び有機層を備え、前記透明電極と
前記有機層との層間に、金属ポルフィリン誘導体化合物
αと該化合物αより極性が小さくかつ該化合物αと親和
性を備えた化合物βとの混合層が設けられているか、又
は前記化合物αを含む層及び前記化合物βを含む層が設
けられている。In another embodiment of the present invention, the organic electroluminescent device comprises a transparent electrode and an organic layer, and the metal porphyrin derivative compound α and the compound α have a smaller polarity between the transparent electrode and the organic layer. In addition, a mixed layer of the compound α and the compound β having an affinity is provided, or a layer containing the compound α and a layer containing the compound β are provided.
【００２５】このように有機電界発光素子の透明電極と
有機層との間に化合物αと化合物βを存在させることに
より、透明電極と有機層との層間の密着力を高めること
ができる。従って、素子が高温条件下にさらされた場合
にも層間の高い密着性により層界面での剥離などを抑制
でき、高温での耐久性向上を図ることができる。なお、
上記透明電極と有機層との間の上記層は、透明電極が陽
極として機能する場合において優れた正孔注入機能を発
揮することができる。As described above, by allowing the compound α and the compound β to exist between the transparent electrode and the organic layer of the organic electroluminescent device, the adhesion between the transparent electrode and the organic layer can be enhanced. Therefore, even when the element is exposed to high temperature conditions, peeling at the layer interface can be suppressed due to the high adhesion between the layers, and the durability at high temperatures can be improved. In addition,
The layer between the transparent electrode and the organic layer can exhibit an excellent hole injection function when the transparent electrode functions as an anode.
【００２６】[0026]
【発明の実施の形態】以下、図面を用いてこの発明の好
適な実施の形態（以下実施形態という）について説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.
【００２７】［実施形態１］図１は、この発明の実施形
態に線状光源の平面構成、図２は図１のＡ−Ａ線に沿っ
た概略断面構造を示し、図３は、図１のＢ−Ｂ線に沿っ
た概略断面構造を示す。[Embodiment 1] FIG. 1 is a plan view of a linear light source according to an embodiment of the present invention, FIG. 2 shows a schematic sectional structure taken along line AA of FIG. 1, and FIG. 2 shows a schematic sectional structure taken along line BB of FIG.
【００２８】線状光源は、素子基板１０、有機電界発光
素子２０、素子形成領域上に樹脂（接着材料）３０によ
って接着された封止基板４０を備える。素子基板１０は
ガラスなどの透明基板を用いることができ、この素子基
板１０上の線状自発光領域を構成する位置に有機電界発
光素子２０が積層形成されている。The linear light source comprises an element substrate 10, an organic electroluminescent element 20, and a sealing substrate 40 adhered on the element formation region with a resin (adhesive material) 30. A transparent substrate such as glass can be used for the element substrate 10, and the organic electroluminescent element 20 is laminated and formed on the element substrate 10 at a position forming a linear self-luminous region.
【００２９】有機電界発光素子２０は、素子基板１０上
に第１電極２１０、有機層２２０及び第２電極２１２が
この順に積層された構造を備える。本実施形態では、第
１電極２１０は陽極として機能し、ＩＴＯ（Indium Tin
Oxide）等が用いられた透明電極であり、第２電極２１
２は陰極として機能し、Ａｌなどの金属電極から構成さ
れている。The organic electroluminescent device 20 has a structure in which a first electrode 210, an organic layer 220 and a second electrode 212 are laminated in this order on the device substrate 10. In the present embodiment, the first electrode 210 functions as an anode, and ITO (Indium Tin)
Oxide) is used as the second electrode 21.
2 functions as a cathode, and is composed of a metal electrode such as Al.
【００３０】ここで、各第１電極２１０及び引き出し配
線２１４は長手方向に非常に細長く延びており、材料で
あるＩＴＯは金属材料と比較すると抵抗は高い。そこ
で、本実施形態では、その配線抵抗を低減するためＩＴ
Ｏ電極の光透過性を著しく損なわない程度に高導電率の
補助電極を形成している。補助電極は、ＩＴＯ電極と素
子基板１０との間か、ＩＴＯ電極上に形成すればよい。
補助電極の材料としては、Ａｇ、Ａｇ合金、クロム等が
採用可能であり、例えば、本実施形態では、低抵抗で耐
薬品性の良好なＡｇ−１．０ｗｔ％Ｐｄ−１．０ｗｔ％
Ｃｕ合金を用いた。このような補助電極を採用すること
で、非常に細長い形状となる第１電極２１０について必
要な導電率を確保でき、端子からの距離にかかわらず均
一な正孔供給機能を発揮させることができる。Here, each of the first electrodes 210 and the lead-out wirings 214 extends very slenderly in the longitudinal direction, and the material ITO has a higher resistance than a metal material. Therefore, in the present embodiment, in order to reduce the wiring resistance, the IT
The auxiliary electrode having high conductivity is formed to the extent that the light transmittance of the O electrode is not significantly impaired. The auxiliary electrode may be formed between the ITO electrode and the element substrate 10 or on the ITO electrode.
As the material of the auxiliary electrode, Ag, Ag alloy, chromium or the like can be adopted. For example, in the present embodiment, Ag-1.0 wt% Pd-1.0 wt% which has low resistance and good chemical resistance.
A Cu alloy was used. By adopting such an auxiliary electrode, it is possible to secure the necessary conductivity for the first electrode 210 having a very elongated shape, and it is possible to exhibit a uniform hole supply function regardless of the distance from the terminal.
【００３１】有機層２２０は、少なくとも発光層を備
え、発光層の単独構造の他、第１電極側から順に、正孔
輸送層／発光層、発光層／電子輸送層の２層構造、正孔
輸送層／発光層／電子輸送層の３層構造、或いは、正孔
注入層／正孔輸送層／発光層／電子輸送層の４層構造な
どによって構成することができる。本実施形態では、後
述するように最後の４層構造を採用している。The organic layer 220 includes at least a light emitting layer, and has a single structure of the light emitting layer, a two-layer structure of a hole transport layer / light emitting layer, a light emitting layer / electron transport layer, and a hole in order from the first electrode side. It can be constituted by a three-layer structure of transport layer / light-emitting layer / electron transport layer, or a four-layer structure of hole injection layer / hole transport layer / light-emitting layer / electron transport layer. In this embodiment, the final four-layer structure is adopted as described later.
【００３２】また本実施形態では、図２に示すように線
状光源の少なくとも発光領域を取り囲むように第１電極
２１０上及びその側面を覆う絶縁層２３０が形成されて
いる。この絶縁層２３０は、必ずしも必要ではないが、
レジスト材料などを用いて構成することができ、発光領
域端部で第１電極２１０と第２電極２１２とがショート
することをより確実に防止することができる。Further, in this embodiment, as shown in FIG. 2, an insulating layer 230 covering the first electrode 210 and the side surface thereof is formed so as to surround at least the light emitting region of the linear light source. This insulating layer 230 is not always necessary,
It can be configured by using a resist material or the like, and it is possible to more reliably prevent the first electrode 210 and the second electrode 212 from being short-circuited at the end of the light emitting region.
【００３３】また、本実施形態では、第２電極２１２を
外部電源に接続するための第２端子及びこれの端子と一
体の引き出し配線２１４が、自発光領域に沿って第１電
極２１０と同一材料を用いてパターニングされている。
上記絶縁層２３０は、素子の第１電極２１０と引き出し
配線２１４との間隙にも形成され第１電極２１０と引き
出し配線２１４とを絶縁している。引き出し配線２１４
上においてこの絶縁層２３０は開口され、この開口領域
には有機層２２０は積層されない。このため、有機層２
２０及び引き出し配線２１４上を覆うように形成された
第２電極２１２と、引き出し配線２１４とはこの絶縁層
２３０の開口位置で電気的に接続されている。Further, in the present embodiment, the second terminal for connecting the second electrode 212 to the external power source and the lead wiring 214 integrated with the terminal are made of the same material as the first electrode 210 along the self-luminous region. Is patterned by using.
The insulating layer 230 is also formed in the gap between the first electrode 210 and the lead wire 214 of the element to insulate the first electrode 210 and the lead wire 214. Lead wire 214
The insulating layer 230 is opened above, and the organic layer 220 is not stacked in this opening region. Therefore, the organic layer 2
The second electrode 212 formed so as to cover the 20 and the lead wire 214 and the lead wire 214 are electrically connected at the opening position of the insulating layer 230.
【００３４】有機電界発光素子２０は、第１電極２１０
から注入される正孔と第２電極２１２から注入される電
子とが有機層２２０中で再結合し発光層に含まれる有機
発光分子が励起されて基底状態に戻ることで発光する。
なお、第１電極２１０と第２電極２１２とが間に発光層
を挟んで重なった位置が自発光領域となる。The organic electroluminescent device 20 includes a first electrode 210.
The holes injected from the second electrode 212 and the electrons injected from the second electrode 212 are recombined in the organic layer 220, and the organic light emitting molecules contained in the light emitting layer are excited to return to the ground state to emit light.
The self-luminous region is a position where the first electrode 210 and the second electrode 212 overlap with each other with the light emitting layer interposed therebetween.
【００３５】このような有機電界発光素子２０を覆って
透明基板１０の素子形成面上には接着剤としての樹脂３
０により、有機電界発光素子２０を覆うように封止基板
４０が接着されている。このため素子基板１０、樹脂３
０及び封止基板４０の間に有機電界発光素子２０が封止
され、素子は外気や水分などから遮蔽されている。樹脂
３０としては、エポキシ系やアクリル系の２液混合型の
光硬化樹脂や熱硬化樹脂などが採用可能である。素子２
０を覆う樹脂３０として紫外線硬化樹脂等の光硬化樹脂
を用いる場合、封止基板４０としては、硬化時に光を透
過するガラスやフィルムなどの透明基板を用いることが
好ましい。光硬化樹脂を用いれば、有機電界発光素子２
０が加熱されることなく封止基板４０を素子基板１０に
接着することができる。熱硬化樹脂を用いる場合には封
止基板４０として透明材料を用いる必要はなく、金属材
料など熱伝導性に優れた基板を用いることで、硬化時に
加えた熱によって素子温度が不要に上昇することを防止
でき、さらに有機電界発光素子２０の駆動による発熱を
速やかに放熱する機能を発揮させることもできる。A resin 3 as an adhesive is formed on the element forming surface of the transparent substrate 10 so as to cover the organic electroluminescent element 20.
The sealing substrate 40 is adhered so as to cover the organic electroluminescent device 20 with the number 0. Therefore, the element substrate 10 and the resin 3
0 and the sealing substrate 40 seal the organic electroluminescent device 20, and the device is shielded from outside air and moisture. As the resin 30, it is possible to employ an epoxy-based or acrylic-based two-liquid mixed type photo-curing resin or thermosetting resin. Element 2
When a photocurable resin such as an ultraviolet curable resin is used as the resin 30 that covers 0, the sealing substrate 40 is preferably a transparent substrate such as glass or a film that transmits light during curing. If a photocurable resin is used, the organic electroluminescence device 2
The sealing substrate 40 can be bonded to the element substrate 10 without heating 0. When a thermosetting resin is used, it is not necessary to use a transparent material as the sealing substrate 40. By using a substrate having excellent thermal conductivity such as a metal material, the element temperature is unnecessarily increased by the heat applied during curing. It is possible to prevent the heat generation, and also to exert the function of promptly radiating the heat generated by driving the organic electroluminescent element 20.
【００３６】本実施形態に係る線状光源において、その
発光領域のサイズ及び形状は、有機電界発光素子２０の
電極及び有機層をパターニングすることが可能であるか
ぎりほとんど制限を受けない。このため、本実施形態に
おいて有機電界発光素子２０の発光領域のサイズは、長
手方向の長さＬ３が線幅方向の長さＬ４の１０倍以上と
することができる。なお、この素子２０の形成される素
子基板１０もまたその長手方向の長さＬ１が、線幅方向
の長さＬ２の１０倍以上の非常に細長い形状（長短比１
０：１）をしている。一例としてこの長短比は１６０：
１である。なお、素子基板１０と発光領域の長短比は、
基板１０上に素子２０が形成されるので原理上概ね等し
くなるものの、素子基板上には外部電源への接続端子な
どを設ける必要があることから、必ずしも一致するわけ
ではない。In the linear light source according to this embodiment, the size and shape of the light emitting region are not particularly limited as long as the electrodes and organic layers of the organic electroluminescent device 20 can be patterned. Therefore, in the present embodiment, the size of the light emitting region of the organic electroluminescent device 20 can be such that the length L3 in the longitudinal direction is 10 times or more the length L4 in the line width direction. The element substrate 10 on which the element 20 is formed also has a very long shape (long-to-short ratio 1) in which the length L1 in the longitudinal direction is 10 times or more the length L2 in the line width direction.
0: 1). As an example, this long / short ratio is 160:
It is 1. The length ratio between the element substrate 10 and the light emitting region is
Although the elements 20 are formed on the substrate 10 so that they are substantially the same in principle, they do not necessarily match because the terminals for connecting to an external power source and the like need to be provided on the element substrate.
【００３７】有機電界発光素子２０を挟んで素子基板１
０と接着される封止基板４０の長手方向の長さＬ５は素
子基板１０の長さＬ１より短く（Ｌ３よりは長い）、有
機電界発光素子２０の第１電極及び第２電極を外部電源
に接続するための引き出した端子を配置するスペースを
素子基板１０の長手方向端部に確保している。Element substrate 1 with the organic electroluminescent element 20 interposed therebetween
The length L5 of the sealing substrate 40 bonded to 0 in the longitudinal direction is shorter than the length L1 of the device substrate 10 (longer than L3), and the first electrode and the second electrode of the organic electroluminescent device 20 are used as an external power source. A space for arranging the drawn-out terminal for connection is secured at the end portion in the longitudinal direction of the element substrate 10.
【００３８】一方、本実施形態において、この封止基板
４０の線幅方向の長さＬ６は、素子基板１０のその長さ
Ｌ２と同一である。つまり、本実施形態の線状光源にお
いて、線幅方向（短軸方向）に沿った辺では、素子基板
１０と封止基板４０との端面位置が一致している。ま
た、両基板を接着し、素子２０を封止するための樹脂３
０の端面位置もこれらの基板と一致している。On the other hand, in this embodiment, the length L6 of the sealing substrate 40 in the line width direction is the same as the length L2 of the element substrate 10. That is, in the linear light source of the present embodiment, the end surface positions of the element substrate 10 and the sealing substrate 40 are aligned on the sides along the line width direction (short axis direction). In addition, a resin 3 for bonding both substrates and sealing the element 20
The end face position of 0 also coincides with these substrates.
【００３９】このような構造を備えた線状光源は単一ワ
ーク体に複数の光源領域を同時に形成し、光源長手方向
に沿ってワーク体を個々の線状光源に切断分離すること
で得る。以下、図４を更に参照して本実施形態に係る線
状光源の製造方法について説明する。素子基板１０とし
て大型基板を用い、この基板上の複数の光源領域にそれ
ぞれ有機電界発光素子２０を形成する。各素子２０は、
基板１０上に第１電極２１０、有機層２２０及び第２電
極２１２をこの順に積層して形成され、最初に形成され
る第１電極２１０及びこの第１電極と一体の第１端子
は、ＩＴＯ層をフォトリソグラフィなどを利用してパタ
ーニングすることで各光源の発光領域となる位置に選択
的に形成する。本実施形態では、次に、レジスト材料を
用いて上記パターニングされたＩＴＯ層及び露出してい
る素子基板１０上の発光領域を取り囲む位置に絶縁層２
３０を形成し、その後、有機層用のシャドーマスクを用
い、真空蒸着によって有機層２２０を発光領域に選択的
に積層する。有機層２２０の蒸着形成後、マスクを第２
電極用に変更し、Ａｌ層を真空蒸着によって積層し、第
２電極２１２と第２電極端子を形成する。これらの工程
を経て各光源領域にそれぞれ有機電界発光素子２０が得
られる。The linear light source having such a structure is obtained by simultaneously forming a plurality of light source regions on a single work body and cutting and separating the work body into individual linear light sources along the longitudinal direction of the light source. Hereinafter, the method for manufacturing the linear light source according to the present embodiment will be described with further reference to FIG. A large substrate is used as the element substrate 10, and the organic electroluminescent element 20 is formed in each of a plurality of light source regions on the substrate. Each element 20 is
The first electrode 210 formed on the substrate 10 by stacking the first electrode 210, the organic layer 220, and the second electrode 212 in this order. The first electrode 210 formed first and the first terminal integrated with the first electrode are the ITO layer. Is patterned by using photolithography or the like to selectively form the light emitting region of each light source. In the present embodiment, next, the insulating layer 2 is formed at a position surrounding the above-described patterned ITO layer using a resist material and the exposed light emitting region on the element substrate 10.
30 is formed, and then the organic layer 220 is selectively stacked on the light emitting region by vacuum evaporation using a shadow mask for the organic layer. After forming the organic layer 220 by vapor deposition, a second mask is formed.
After being changed to an electrode, an Al layer is laminated by vacuum deposition to form a second electrode 212 and a second electrode terminal. Through these steps, the organic electroluminescent element 20 is obtained in each light source region.
【００４０】素子２０の形成後、大型の素子基板１０の
全体に紫外線硬化性の樹脂３０を塗布し、素子基板と同
様に大型の封止基板４０を樹脂３０上に載置し、紫外線
を封止基板４０の非接着面側から照射して樹脂３０を硬
化し、封止基板４０を素子基板１０に接着する。After the element 20 is formed, an ultraviolet curable resin 30 is applied to the entire large element substrate 10, and a large sealing substrate 40 is placed on the resin 30 in the same manner as the element substrate to block ultraviolet rays. The resin 30 is cured by irradiation from the non-bonding surface side of the stop substrate 40, and the sealing substrate 40 is bonded to the element substrate 10.
【００４１】このようにして図４に示すような１つのワ
ーク体を形成する。次に、ダイサーなどを用い図４のワ
ーク体の一点鎖線で示す位置（線状光源の長辺に相当す
る位置）を切断する。従って、封止基板４０及び素子基
板とは光源長辺位置において同時に切断され、個々の線
状光源１００が得られる。ここで、有機電界発光素子２
０は切断面よりも内側、例えば５００μｍ程度も内側に
存在する。ダイシングは、切面に水を流しながら行う
が、上記５００μｍ程度も素子が切断面から内側に位置
していることで、切断時、素子２０は露出せずに樹脂３
０に覆われたままであり、水分や外気などから素子２０
は確実に保護される。また、封止基板４０と素子基板１
０のいずれかがダイサーによる切断開始面側に位置する
ため、素子２０に直接予期しない外力が加わることが防
止され、またワーク体は２枚の基板が張り合わされて構
成されているので十分な機械的強度を備えており、切断
時における基板の割れなどが防止されている。In this way, one work body as shown in FIG. 4 is formed. Next, the position (the position corresponding to the long side of the linear light source) indicated by the alternate long and short dash line in FIG. 4 is cut using a dicer or the like. Therefore, the sealing substrate 40 and the element substrate are simultaneously cut at the light source long side position, and the individual linear light sources 100 are obtained. Here, the organic electroluminescent device 2
0 exists inside the cut surface, for example, about 500 μm inside. The dicing is performed while flowing water on the cut surface. However, since the element is located inside from the cut surface by about 500 μm, the element 20 is not exposed at the time of cutting and the resin 3 is not exposed.
The element 20 remains covered with 0 and is protected from moisture and the outside air.
Is definitely protected. In addition, the sealing substrate 40 and the element substrate 1
Since any of 0 is located on the cutting start surface side by the dicer, it is possible to prevent an unexpected external force from being directly applied to the element 20, and the work body is constructed by laminating two substrates, so that it is a sufficient machine. It has a high mechanical strength and prevents the substrate from cracking during cutting.
【００４２】さらに、単一のワーク体に複数の線状光源
を作り込んでから各光源を切断分離するため、本実施形
態のように線幅数ｍｍ、長手方向の長さが１００ｍｍな
どといった非常に細長い形状の線状光源を作製する場合
であっても、封止基板と素子基板との貼り合わせにはそ
れほど高い位置合わせ精度が要求されない。従って、予
め線状光源の形状に合わせて切り出した細長い素子基板
上に有機電界発光素子２０を形成し、さらに、同様の細
長い封止基板４０を貼り合わせる場合等と比較して、製
造が非常に容易である。Further, since a plurality of linear light sources are formed in a single work body and then the respective light sources are cut and separated, the line width is several mm and the length in the longitudinal direction is 100 mm as in this embodiment. Even when a linear light source having a long and narrow shape is manufactured, a very high alignment accuracy is not required for bonding the sealing substrate and the element substrate. Therefore, as compared with the case where the organic electroluminescent element 20 is formed on the elongated element substrate which is cut out in advance according to the shape of the linear light source and the similar elongated sealing substrate 40 is attached, the manufacturing is very easy. It's easy.
【００４３】また、現在、切断精度は、既に必要な精度
が達成されており、上述のような非常に細長い形状の線
状光源をワーク体から正確に切り出すことができる。At present, the required cutting accuracy has already been achieved, and the linear light source having a very elongated shape as described above can be accurately cut out from the work body.
【００４４】ワーク体からの各線状光源の分離は、上記
ダイシングの他、予め切れ目を付けた素子基板及び封止
基板を用い、樹脂を硬化した後に割って切断することで
実現してもよい。また、細いヒータ線に電流を流し、熱
刺激によって素子母基板と封止母基板を切断する方法を
採用することもできる。The separation of each linear light source from the work body may be achieved by dicing, or by using an element substrate and a sealing substrate which are pre-cut, and curing and then cutting the resin. It is also possible to employ a method in which an electric current is passed through a thin heater wire and the element mother substrate and the sealing mother substrate are cut by thermal stimulation.
【００４５】次に、有機層２２０について具体的に説明
する。本実施形態において、発光層材料として、下記一
般式（ｉ）Next, the organic layer 220 will be specifically described. In the present embodiment, as the light emitting layer material, the following general formula (i) is used.
【化５】
に示されるピレン誘導体化合物を用いることができる。
このピレン誘導体を発光層材料として用いることで、高
輝度、高色純度かつ長寿命の青色発光等を実現すること
ができる。また、発光層材料として、下記一般式（ii）[Chemical 5] The pyrene derivative compound represented by can be used.
By using this pyrene derivative as a light emitting layer material, blue light emission with high brightness, high color purity and long life can be realized. Further, as a light emitting layer material, the following general formula (ii)
【化６】
に示されるジビニルキノリン誘導体化合物を用いること
ができる。なお、式中にも示すように、置換基Ｒ11〜Ｒ
17のうち少なくとも２つは式（１）で示すビニル基で置
換され、式（１）の末端Ｑは式（２）で表され、Ｒ11〜
Ｒ17のうちの残りとＲ18〜Ｒ22、Ｒｎ及びＲ’ｎは水素
原子又は任意の置換基である。また式（１）においてｎ
２は、１以上の整数を示す。このようなジビニルキノリ
ン誘導体化合物を用いることで、高輝度、高色純度かつ
長寿命の赤色発光等を実現することができる。[Chemical 6] The divinylquinoline derivative compound shown in can be used. As shown in the formula, the substituents R 11 to R
At least two of 17 are substituted with the vinyl group represented by the formula (1), the terminal Q of the formula (1) is represented by the formula (2), and R 11 to
The rest of R 17 and R 18 to R 22 , Rn and R′n are hydrogen atoms or optional substituents. Further, in the formula (1), n
2 represents an integer of 1 or more. By using such a divinylquinoline derivative compound, high luminance, high color purity, and long-life red light emission can be realized.
【００４６】更に、高輝度、高色純度かつ長寿命の緑色
発光等を実現するために、発光層材料として公知のアル
ミキノリノール錯体（Ａｌｑ3）等を用いることができ
る。また、このＡｌｑ3は、電子輸送層の材料としても
用いることができる。Further, in order to realize green light emission with high brightness, high color purity and long life, a known aluminum quinolinol complex (Alq 3 ) or the like can be used as a light emitting layer material. Further, this Alq 3 can also be used as a material for the electron transport layer.
【００４７】また、第１電極２１０と正孔輸送層との間
に設ける正孔注入層としては、下記化学式（３）The hole injection layer provided between the first electrode 210 and the hole transport layer has the following chemical formula (3).
【化７】
に示す銅フタロシアニン（ＣｕＰｃ）を用いることがで
きる。本実施形態では、この正孔注入層として上記Ｃｕ
Ｐｃに加え、更に下記化学式（４）[Chemical 7] Copper phthalocyanine (CuPc) shown in can be used. In the present embodiment, the above-mentioned Cu is used as this hole injection layer.
In addition to Pc, the following chemical formula (4)
【化８】
に示される無金属フタロシアニン（ＨＰｃ）との混合層
を採用する。なお、ＣｕＰｃ層とＨＰｃ層がＩＴＯから
なる第１電極２１０側からこの順に積層された構造とす
ることも可能である。ＣｕＰｃは、分子中に極性を備え
ており、同様に極性のあるＩＴＯと高い親和性を示すと
共に、高い耐熱性を備え、さらにＩＴＯ電極から高い効
率で正孔を注入することができる。一方、ＨＰｃは、上
記ＣｕＰｃと親和性がありかつ正孔注入機能を備える
が、金属錯体を構成していないので、極性が低い。ここ
で、正孔輸送層としては、下記化学式（５）[Chemical 8] The mixed layer with the metal-free phthalocyanine (HPc) shown in FIG. It is also possible to have a structure in which the CuPc layer and the HPc layer are laminated in this order from the first electrode 210 side made of ITO. CuPc has polarities in the molecule, shows high affinity with ITO which is also polar in the same manner, has high heat resistance, and can inject holes from the ITO electrode with high efficiency. On the other hand, HPc has affinity with CuPc and has a hole injection function, but since HPc does not form a metal complex, it has low polarity. Here, the hole transport layer has the following chemical formula (5).
【化９】
のＴＰＴＥ等、トリフェニルアミンの多量体が多用され
ており、分子の極性が低い。従って、上記ＨＰｃはこの
正孔輸送材料に対する親和性を示す。このため、正孔注
入層の材料としてＣｕＰｃとＨＰｃとを用いることで、
第１電極との親和性と、正孔輸送層との親和性の両方を
実現でき、素子寿命の向上を図ることができる。[Chemical 9] TPTE and other multimers of triphenylamine are frequently used, and the polarity of the molecule is low. Therefore, the HPc has an affinity for this hole transport material. Therefore, by using CuPc and HPc as the material of the hole injection layer,
Both the affinity with the first electrode and the affinity with the hole transport layer can be realized, and the device life can be improved.
【００４８】［実施形態２］図５は、上記線状光源を更
に改良した構成例を示している。この構成においては、
素子基板１０に形成された有機電界発光素子２０に対
し、樹脂３０を用いて封止基板４０を貼り合わせる前
に、該素子２０を覆って保護膜５０を形成する。[Second Embodiment] FIG. 5 shows an example of a configuration in which the linear light source is further improved. In this configuration,
Before the sealing substrate 40 is attached to the organic electroluminescent device 20 formed on the device substrate 10 using the resin 30, the protective film 50 is formed to cover the device 20.
【００４９】保護膜５０はヘテロ環式化合物の重合体を
含む有機保護膜から構成することができるが、上記有機
化合物を含む有機保護膜と、窒化膜などから構成される
無機保護膜との積層構造とすることがより好ましい。有
機保護膜の材料として上記ヘテロ環式化合物の重合体
は、フラン、ピロール、チオフェンのいずれかの重合体
又は共重合体が採用でき、これらをプラズマ重合によっ
て成膜して有機保護膜を得る。無機保護膜は、上記窒化
膜のほか、酸化膜、炭素膜又はシリコン膜などを採用す
ることができ、より具体的には窒化珪素膜、窒化硼素
膜、窒化アルミニウム膜、酸化珪素膜、酸化アルミニウ
ム膜、酸化チタン膜、アモルファスシリコン膜又はダイ
アモンド状カーボン等であり、これらの膜はプラズマＣ
ＶＤによって成膜することができる。The protective film 50 can be composed of an organic protective film containing a polymer of a heterocyclic compound, and is a laminate of an organic protective film containing the above organic compound and an inorganic protective film composed of a nitride film or the like. The structure is more preferable. As a polymer for the organic protective film, a polymer or copolymer of furan, pyrrole or thiophene can be adopted as the polymer of the heterocyclic compound, and these are formed by plasma polymerization to obtain an organic protective film. As the inorganic protective film, an oxide film, a carbon film, a silicon film or the like can be adopted in addition to the above-mentioned nitride film, and more specifically, a silicon nitride film, a boron nitride film, an aluminum nitride film, a silicon oxide film, an aluminum oxide film. A film, a titanium oxide film, an amorphous silicon film, diamond-like carbon, or the like, and these films are plasma C
A film can be formed by VD.
【００５０】有機保護膜と無機保護膜はどちらを有機電
界発光素子側に成膜しても良い。いずれの保護膜も水や
酸素に対する高い遮蔽性を備え、また熱伝導度が比較的
高いため、有機層の水や酸素による劣化や、熱による劣
化を確実に防止できる。また、素子２０を形成した後、
素子上に樹脂３０塗布するので、本実施形態２のように
素子２０を覆って保護膜５０を設けることで、この樹脂
からの不純物や、接着用溶剤などが素子に侵入すること
を防止することができる。Either the organic protective film or the inorganic protective film may be formed on the organic electroluminescent element side. Since each of the protective films has a high shielding property against water and oxygen and has a relatively high thermal conductivity, deterioration of the organic layer due to water and oxygen and deterioration due to heat can be reliably prevented. In addition, after forming the element 20,
Since the resin 30 is applied onto the element, by providing the protective film 50 so as to cover the element 20 as in the second embodiment, it is possible to prevent impurities from the resin, an adhesive solvent, and the like from entering the element. You can
【００５１】また本実施形態では無機保護膜としてＳｉ
Ｎ膜、有機保護膜としてフラン膜を有機電界発光素子側
からこの順に形成している。無機保護膜を有機電界発光
素子側に形成することで、有機保護膜中の重合体と素子
中の有機化合物とが反応することを防止している。また
有機電界発光素子側から無機保護膜、有機保護膜、無機
保護膜の３層構造とすることも可能である。In the present embodiment, Si is used as the inorganic protective film.
An N film and a furan film as an organic protective film are formed in this order from the organic electroluminescent element side. By forming the inorganic protective film on the organic electroluminescent element side, the reaction of the polymer in the organic protective film with the organic compound in the element is prevented. It is also possible to have a three-layer structure of an inorganic protective film, an organic protective film, and an inorganic protective film from the organic electroluminescent element side.
【００５２】［実施形態３］次に実施形態３として、多
色発光する線状光源について図６及び図７を参照して説
明する。図６はこの線状光源の平面構造、図７は、図６
のＣ−Ｃ線方向に沿った断面構造を示している。[Third Embodiment] Next, as a third embodiment, a linear light source that emits multicolor light will be described with reference to FIGS. 6 is a plane structure of this linear light source, and FIG.
3 shows a cross-sectional structure taken along line CC of FIG.
【００５３】本実施形態３の線状光源が実施形態１の線
状光源と相違する点は、同一素子基板１０に赤発光領域
２１ｒ，緑発光領域２１ｇ，青発光領域２１ｂを備える
ことであり、他の構成は共通する。Ｒ，Ｇ，Ｂの各自発
光領域はそれぞれ対応する発光色を示す有機電界発光素
子２０ｒ、２０ｇ、２０ｂより構成されている。素子基
板１０上には、各色発光領域毎に独立した第１電極２１
０（２１０ｒ、２１０ｇ、２１０ｂ）が形成されてい
る。また第１電極上には、発光色に応じて異なる有機材
料が用いられた有機層２２０ｒ，２２０ｇ，２２０ｂが
積層され、各有機層２２０ｒ，２２０ｇ，２２０ｂの上
には共通第２電極２１２が積層されている。The linear light source of the third embodiment differs from the linear light source of the first embodiment in that the same element substrate 10 is provided with a red light emitting region 21r, a green light emitting region 21g, and a blue light emitting region 21b. Other configurations are common. Each of the R, G, and B self-luminous regions is composed of organic electroluminescent elements 20r, 20g, and 20b exhibiting corresponding luminescent colors. On the element substrate 10, a first electrode 21 is provided independently for each color light emitting region.
0 (210r, 210g, 210b) is formed. In addition, organic layers 220r, 220g, 220b made of different organic materials are stacked on the first electrode, and a common second electrode 212 is stacked on each organic layer 220r, 220g, 220b. Has been done.
【００５４】第１電極２１０及び有機層２２０の他の色
の素子との間隙には、第１電極２１０のパターニング
後、各有機層２２０の形成前にレジスト材料などを用い
た絶縁層２３０を形成しておくことで、第２電極２１２
と各第１電極２１０とを確実に絶縁することができる。
なお、実施形態１と同様、第２電極２１２の引き出し配
線２１４は、発光領域２１の長手方向に沿って第１電極
２１０と同一材料を用いてパターニングされ、絶縁層２
３０が配線２１４上で開口されており配線２１４と第２
電極２１２とが接続されている。In the gap between the first electrode 210 and the element of another color of the organic layer 220, an insulating layer 230 using a resist material or the like is formed after patterning the first electrode 210 and before forming each organic layer 220. By doing so, the second electrode 212
And each 1st electrode 210 can be reliably insulated.
As in the first embodiment, the lead-out wiring 214 of the second electrode 212 is patterned along the longitudinal direction of the light emitting region 21 using the same material as the first electrode 210, and the insulating layer 2 is formed.
30 is opened on the wiring 214, and the wiring 214 and the second
The electrode 212 is connected.
【００５５】以上のような有機電界発光素子２０ｒ、２
０ｇ、２０ｂの第２電極側には実施形態１と同様に樹脂
３０が配され、さらにその上方に封止基板４０が接着さ
れている。なお、実施形態２のように各有機電界発光素
子２０ｒ、２０ｇ、２０ｂは保護膜で覆うことで素子の
寿命を向上することができる。The organic electroluminescent elements 20r, 2 as described above
The resin 30 is disposed on the second electrode side of 0 g and 20 b, as in the first embodiment, and the sealing substrate 40 is further adhered above the resin 30. The organic electroluminescent elements 20r, 20g, and 20b may be covered with a protective film as in the second embodiment to improve the life of the elements.
【００５６】なお、図６及び図７に示す各線状光源は、
実施形態１と同様、単一ワーク体から切断分離すること
で得られ、この線状光源の長辺では素子基板１０と封止
基板４０との側面が一致する。The linear light sources shown in FIGS. 6 and 7 are
Similar to the first embodiment, it is obtained by cutting and separating from a single work body, and the long sides of this linear light source have the side surfaces of the element substrate 10 and the sealing substrate 40 coincide with each other.
【００５７】線状光源のサイズは、もちろんこれに限定
されるものではないが、例えば、素子基板１０の線幅５
ｍｍ、長手方向長さ９０ｍｍ、Ｒ，Ｇ，Ｂの各発光領域
の線幅０．５ｍｍでその長手方向長さは８０ｍｍ、発光
領域の長辺から素子基板及び封止基板の長辺までの距離
が５００μｍ程度などとすることができ、長短比が１
０：１以上の非常に細長い線状光源を実現することがで
きる。The size of the linear light source is not limited to this, of course.
mm, the length in the longitudinal direction is 90 mm, the line width of each light emitting region of R, G, B is 0.5 mm, and the length in the longitudinal direction is 80 mm, and the distance from the long side of the light emitting region to the long side of the element substrate and the sealing substrate. Can be about 500 μm, and the long / short ratio is 1
A very elongated linear light source of 0: 1 or more can be realized.
【００５８】本実施形態３において、Ｒ，Ｇ，Ｂの各有
機電界発光素子２０ｒ、２０ｇ、２０ｂをそれぞれ最適
な有機発光材料を用いることで、各色について純度の高
い光を得ることができる。また、各素子は第１電極及び
有機層が個別に形成されているため、個別に制御して発
光させることができる。従って、この３色の加色によっ
て色純度の高い（正確な）白色光を得ることが可能であ
り、さらに、各色の素子を個別制御することで任意の色
の光を得ることも可能である。In the third embodiment, by using an optimum organic light emitting material for each of the R, G, B organic electroluminescent elements 20r, 20g, 20b, it is possible to obtain highly pure light for each color. In addition, since the first electrode and the organic layer are individually formed in each element, the elements can be individually controlled to emit light. Therefore, it is possible to obtain (accurate) white light with high color purity by adding these three colors, and it is also possible to obtain light of any color by individually controlling the elements of each color. .
【００５９】［実施形態４］実施形態４に係る線状光源
は、上記各実施形態のような構成に加え、微小光共振器
構造を備えており光源の特定方向における発光輝度を向
上させている。図８は、この実施形態４に係る線状光源
の線幅方向の概略断面構造を示している。この線状光源
は、素子基板１０上にまず多層膜ミラー（誘電体ミラ
ー）６０が積層され、その上に有機電界発光素子２０が
積層されている。多層膜ミラー６０は、マグネトロンス
パッタ法などを用いて成膜され、互いに屈折率が異なる
２種類の誘電体層６２，６４が交互に積層されて構成さ
れている。この誘電体層は例えばＳｉＯ2膜、ＴｉＯ2膜
が採用できる。微小光共振器は、金属材料からなる第２
電極２１２と上記多層膜ミラー６０との間で構成され、
この微小光共振器の光学長（多層膜ミラーへの光染み込
み量＋透明第１電極２１０の層厚＋有機層２２０の層
厚）は、増強目的波長λに応じて決定する。[Fourth Embodiment] The linear light source according to the fourth embodiment is provided with a micro-optical resonator structure in addition to the configuration of each of the above-described embodiments, and improves the light emission luminance of the light source in a specific direction. . FIG. 8 shows a schematic sectional structure in the line width direction of the linear light source according to the fourth embodiment. In this linear light source, a multilayer film mirror (dielectric mirror) 60 is first laminated on the element substrate 10, and the organic electroluminescent element 20 is laminated thereon. The multilayer mirror 60 is formed by using a magnetron sputtering method or the like, and is configured by alternately stacking two types of dielectric layers 62 and 64 having different refractive indexes. For this dielectric layer, for example, a SiO 2 film or a TiO 2 film can be adopted. The micro-optical resonator is made of a metallic material
It is configured between the electrode 212 and the multilayer mirror 60,
The optical length of this micro-optical resonator (amount of light soaked into the multilayer mirror + layer thickness of the transparent first electrode 210 + layer thickness of the organic layer 220) is determined according to the enhancement target wavelength λ.
【００６０】実施形態３のように１つの線状光源におい
て多色発光させる場合には、各発光色を示す有機電界発
光素子２０ｒ、２０ｇ、２０ｂ毎に増強目的波長が異な
るため、多層膜ミラー及び素子によって構成される光学
長を増強目的波長に応じてそれぞれ最適な値になるよう
に設計する。また、素子寿命をより向上するためには図
５に示したように、有機電界発光素子を覆う保護膜５０
を形成することが好ましい。When multicolor light emission is performed by one linear light source as in the third embodiment, the enhancement target wavelength is different for each organic electroluminescent element 20r, 20g, 20b showing each emission color. The optical length formed by the elements is designed to have an optimum value according to the target wavelength for enhancement. Further, in order to further improve the device life, as shown in FIG. 5, a protective film 50 covering the organic electroluminescence device.
Is preferably formed.
【００６１】本実施形態４のように光共振器構造を線状
光源に採用することで、例えば光源の特定方向（ここで
は素子前方）への指向性を高めることができ、光源光の
利用効率の向上を図ることができる。By adopting the optical resonator structure for the linear light source as in the fourth embodiment, for example, the directivity of the light source in a specific direction (here, the element front side) can be enhanced, and the light source light utilization efficiency is improved. Can be improved.
【００６２】なお、以上各実施形態において説明した線
状光源は単独で光源として用いるものに限られず、同様
の線状光源を複数長手方向に組み合わせ配置し、一層細
長い線状光源装置を構成してもよい。このような用途に
おいても、各実施形態の光源はいずれもその線幅は非常
に狭く、特別な外部光学手段を用いることなく均一な線
状の光を発することができるため、線状光源として性能
の高い装置を実現することができる。The linear light sources described in the above embodiments are not limited to those used alone as a light source, and a plurality of similar linear light sources are arranged in combination in the longitudinal direction to form a more elongated linear light source device. Good. Even in such an application, the light source of each of the embodiments has a very narrow line width and can emit a uniform linear light without using a special external optical means, and therefore has a performance as a linear light source. It is possible to realize a high-performance device.
【００６３】[0063]
【実施例】［実施例１：３色発光の線状光源］実施例１
として、Ｒ，Ｇ，Ｂの３色発光の線状光源を作製した。
構成は、上述の図６の通りである。Ｒ，Ｇ，Ｂの各有機
電界発光素子２０ｒ、２０ｇ、２０ｂの陽極（第１電極
２１０）と、陰極（第２電極）の引き出し配線２１４を
構成する４本のＩＴＯ電極が予め形成されたガラス基板
を素子基板１０として用いた。なお、本実施例では、各
第１電極２１０及び引き出し配線２１４の材料であるＩ
ＴＯは金属材料と比較すると高抵抗であるため、このＩ
ＴＯ電極と重ねてＡｇ−１．０ｗｔ％Ｐｄ−１．０ｗｔ
％Ｃｕ合金からなる補助電極を形成し、ＩＴＯ電極の配
線抵抗を低減した。[Examples] [Example 1: linear light source emitting three colors] Example 1
As a result, a linear light source emitting three colors of R, G and B was manufactured.
The configuration is as shown in FIG. Glass on which four ITO electrodes forming the anode (first electrode 210) of each of the R, G, and B organic electroluminescent elements 20r, 20g, 20b and the cathode (second electrode) lead-out wiring 214 are formed in advance. The substrate was used as the element substrate 10. It should be noted that, in the present embodiment, I, which is the material of each first electrode 210 and the lead wire 214, is used.
Since TO has a higher resistance than metal materials, this I
Overlay with TO electrode Ag-1.0wt% Pd-1.0wt
% Cu alloy to form an auxiliary electrode to reduce the wiring resistance of the ITO electrode.
【００６４】以上のような第１電極２１０及び引き出し
配線２１４の形成された素子基板１０に対し、レジスト
絶縁層２３０を形成し、Ｒ，Ｇ，Ｂの各発光領域２１
Ｒ，Ｇ，Ｂと引き出し配線領域２１４、さらに図６中で
は左端に設けた端子領域のみ開口した。A resist insulating layer 230 is formed on the element substrate 10 on which the first electrode 210 and the lead-out wiring 214 are formed as described above, and the R, G, and B light emitting regions 21 are formed.
Only the R, G, B and lead-out wiring regions 214 and the terminal region provided at the left end in FIG. 6 are opened.
【００６５】その後、素子基板１０を真空蒸着室に搬入
し、正孔注入・正孔輸送層用のシャドーマスクを用い、
真空蒸着（５×１０-7Ｔｏｒｒ：但し１Ｔｏｒｒ≒１３
３Ｐａ）により、ここではＲ，Ｇ，Ｂ領域全て正孔注入
層及び正孔輸送層を連続して積層した。正孔注入層には
上記化学式（３）に示す銅フタロシアニン（ＣｕＰｃ）
を用い、１５ｎｍの厚さに堆積した。正孔輸送層には、
上記化学式（５）に示すＴＰＴＥ（トリフェニルアミン
４量体）を用い、４５ｎｍの厚さに堆積した。After that, the element substrate 10 is carried into a vacuum deposition chamber, and a shadow mask for hole injection / hole transport layer is used.
Vacuum deposition (5 × 10 −7 Torr: 1 Torr≈13
3 Pa), the hole injecting layer and the hole transporting layer are continuously laminated in all the R, G, B regions. Copper phthalocyanine (CuPc) represented by the above chemical formula (3) is used for the hole injection layer.
Was used to deposit a thickness of 15 nm. In the hole transport layer,
TPTE (triphenylamine tetramer) represented by the above chemical formula (5) was used and deposited to a thickness of 45 nm.
【００６６】次に、青色発光領域のみ開口した青色用の
シャドーマスクに変更し、青色発光層の材料として、上
述の一般式（ｉ）で示わされる有機化合物、具体的には
下記化学式（６）Next, the shadow mask for blue, which is opened only in the blue light emitting region, is changed to the organic compound represented by the above general formula (i) as a material of the blue light emitting layer, specifically, the following chemical formula ( 6)
【化１０】
に示されるピレン誘導体（ＰＹ−ＡＤ）をホストとして
用いた。また、ゲスト材料としては、化学式（７）[Chemical 10] The pyrene derivative shown in (PY-AD) was used as a host. Further, as the guest material, the chemical formula (7)
【化１１】
に示す有機化合物（ＢＣｚＶＢｉ）を用い、上記ホスト
中にこのゲスト材料が１．５ｗｔ％（質量％）ドープさ
れるように同時蒸着を行い２０ｎｍの発光層を積層し
た。さらに、電子輸送層の材料として下記化学式（８）[Chemical 11] Using the organic compound (BCzVBi) shown in 1 above, co-evaporation was performed so that the guest material was doped with 1.5 wt% (mass%) of the host, and a 20 nm light emitting layer was laminated. Further, as a material of the electron transport layer, the following chemical formula (8)
【化１２】
に示すＡｌｑ3を他の材料をドープすることなく４０ｎ
ｍ蒸着した。[Chemical 12] Alq 3 shown in 40 n without doping with other materials
m was vapor-deposited.
【００６７】次に緑色領域のみ開口した緑用シャドーマ
スクを用い、緑色発光層の材料として上記化学式（８）
のＡｌｑ3をホスト材料として用い、ゲスト材料として
下記化学式（９）Next, using a shadow mask for green having openings only in the green region, the above chemical formula (8) was used as a material for the green light emitting layer.
Alq 3 of is used as a host material and the following chemical formula (9) is used as a guest material.
【化１３】
に示す有機化合物（ＤＭＱｄ）を用い、上記Ａｌｑ3に
対しこのＤＭＱｄが１％ドープされるように同時蒸着に
より２０ｎｍの厚さの発光層を形成した。さらに、電子
輸送層の材料として上記化学式（８）のＡｌｑ3を他の
材料をドープすることなく４０ｎｍ蒸着した。[Chemical 13] Using the organic compound (DMQd) shown in (1), a light emitting layer having a thickness of 20 nm was formed by co-evaporation so that 1% of DMqd was doped to Alq 3 . Further, Alq 3 of the above chemical formula (8) was vapor-deposited with a thickness of 40 nm as a material of the electron transport layer without doping other materials.
【００６８】次に赤色領域のみ開口した赤用シャドーマ
スクを用い、赤色発光層の材料として上記化学式（８）
のＡｌｑ3をホスト材料として用い、ゲスト材料として
下記化学式（１０）Next, using a red shadow mask having openings only in the red region, the above chemical formula (8) was used as a material for the red light emitting layer.
Alq 3 of is used as a host material and the following chemical formula (10) is used as a guest material.
【化１４】
に示す有機化合物（ＤＣＪＴＢ）を用い、上記Ａｌｑ3
に対しこのＤＣＪＴＢが１．７ｗｔ％ドープされるよう
に同時蒸着により２０ｎｍの厚さの発光層を形成した。
さらに、電子輸送層の材料としてＡｌｑ3をノンドープ
で４０ｎｍ蒸着した。[Chemical 14] Using the organic compound (DCJTB) shown in 1.
On the other hand, a light emitting layer having a thickness of 20 nm was formed by co-evaporation so that the DCJTB was doped at 1.7 wt%.
Further, Alq 3 was vapor-deposited with a thickness of 40 nm as a material of the electron transport layer without doping.
【００６９】この後さらに、各発光領域で共通の開口部
を備えた第２電極（陰極）形成用のシャドーマスクを用
いてＬｉＦ層を０．５ｎｍ、Ａｌ層を１５０ｎｍ蒸着し
積層構造の共通第２電極（金属電極）を形成し、素子部
を得た。素子部完成後、素子基板を高真空排気したチャ
ンバーに搬送し、チャンバー内を窒素置換した後、光硬
化性のエポキシ樹脂を用い、ガラスの封止基板４０を貼
り合わせ、封止基板４０の非接着面側から紫外線を照射
して接着した。After that, a LiF layer was deposited to a thickness of 0.5 nm and an Al layer was deposited to a thickness of 150 nm by using a shadow mask for forming the second electrode (cathode) having a common opening in each light emitting region. Two electrodes (metal electrodes) were formed to obtain an element part. After the element portion is completed, the element substrate is transferred to a chamber that is evacuated to a high vacuum, the inside of the chamber is replaced with nitrogen, and then a glass sealing substrate 40 is attached using a photo-curable epoxy resin. Ultraviolet rays were irradiated from the bonding surface side to bond.
【００７０】このような工程を経て図４に示すように大
型の素子基板上に複数の線状光源領域が形成されたワー
ク体を得た。このワーク体に対し、ダイサーを用いて５
ｍｍ幅の線状光源を順次切断分離した。こうして得られ
た線状光源は図６に示すような平面構成を備えている。Through these steps, a work body having a plurality of linear light source regions formed on a large element substrate as shown in FIG. 4 was obtained. For this work body, 5 using a dicer
A linear light source with a width of mm was cut and separated in order. The linear light source thus obtained has a plane configuration as shown in FIG.
【００７１】Ｒ，Ｇ，Ｂの各発光領域２１ｒ，ｇ，ｂに
対しそれぞれ１０ｍＡで定電流駆動したときの初期特性
は下記表１に示すとおりである。The initial characteristics of the R, G, and B light emitting regions 21r, g, and b when driven with a constant current of 10 mA are as shown in Table 1 below.
【００７２】[0072]
【表１】
即ち、表１に示すように、各発光領域におけるＥＬ発光
ピークと色度座標の値から、色純度の良いＲ，Ｇ，Ｂ発
光が得られることがわかる。また、発光効率が高く、十
分高い発光輝度が得られている。更に、各発光領域内で
輝度ばらつきが非常に少なく、全ての発光領域内で±１
０％以内の輝度分布を実現している。[Table 1] That is, as shown in Table 1, it can be seen from the EL emission peaks and the chromaticity coordinate values in each emission region that R, G, B emission with good color purity can be obtained. Further, the luminous efficiency is high and a sufficiently high luminous brightness is obtained. Furthermore, there is very little variation in brightness within each light emitting area, and ± 1 within all light emitting areas.
A brightness distribution within 0% is realized.
【００７３】［実施例２：３色光源長寿命化］実施例２
として、長寿命化と信頼性を向上させた３色発光の線状
光源を作製した。[Second Embodiment: Long Life of Three Color Light Source] Second Embodiment
As a result, a linear light source of three-color emission having a long life and improved reliability was manufactured.
【００７４】上記実施例１では、正孔注入層に化学式
（３）に示すＣｕＰｃを用いたが、本実施例２では、Ｃ
ｕＰｃに加え、化学式（４）に示す無金属フタロシアニ
ン（ＨＰｃ）を５ｗｔ％混合した層を正孔注入層として
用いた。Although CuPc represented by the chemical formula (3) was used for the hole injecting layer in Example 1, in Example 2, CpC was used.
A layer obtained by mixing 5 wt% of metal-free phthalocyanine (HPc) represented by the chemical formula (4) in addition to uPc was used as the hole injection layer.
【００７５】赤色発光層材料としては、Ａｌｑ3をホス
ト材料とし、ゲスト材料には一般式（ｉｉ）で表される
有機化合物として、下記化学式（１１）Alq 3 was used as the host material for the red light emitting layer material, and the organic compound represented by the general formula (ii) was used as the guest material, and the following chemical formula (11) was used.
【化１５】
で示されるジビニルキノリン誘導体化合物（ＤＶＱ）を
採用した。そして、このＤＶＱをＡｌｑ3に対し１．２
ｗｔ％の割合となるようドープして２０ｎｍの発光層を
形成した。有機電界発光素子の他の構成は上記実施例１
と同一であり、各発光領域のサイズ、線状光源のサイズ
についても実施例１と同一とした。[Chemical 15] The divinylquinoline derivative compound (DVQ) represented by And this DVQ is 1.2 with respect to Alq 3.
A 20 nm light emitting layer was formed by doping so as to have a wt% ratio. The other structure of the organic electroluminescent device is the same as that of the first embodiment.
The size of each light emitting region and the size of the linear light source were also the same as in Example 1.
【００７６】各色の有機電界発光素子２０を形成した
後、実施例１では樹脂３０を用いて封止基板４０を接着
したが、本実施例２では封止基板４０の接着前に、図５
に示すように各有機電界発光素子２０ｒ、２０ｇ、２０
ｂを保護膜５０で覆った。保護膜は、無機保護膜と有機
保護膜との積層構造とし、まずＳｉＮ膜をプラズマＣＶ
Ｄ法で０．３μｍ成膜し、更にフラン膜をプラズマ重合
法で２μｍ成膜した。そして、その後、実施例１と同様
に封止基板４０を紫外線硬化樹脂で接着し、得られたワ
ーク体をダイサーで切断分離し、各線状光源を得た。After forming the organic electroluminescent element 20 of each color, the sealing substrate 40 was adhered using the resin 30 in Example 1, but in Example 2 before the encapsulation substrate 40 was adhered, as shown in FIG.
As shown in FIG. 1, each organic electroluminescent device 20r, 20g, 20
b was covered with a protective film 50. The protective film has a laminated structure of an inorganic protective film and an organic protective film, and the SiN film is first subjected to plasma CV.
A film having a thickness of 0.3 μm was formed by the D method, and a film having a thickness of 2 μm was formed by a plasma polymerization method. Then, after that, the sealing substrate 40 was adhered with an ultraviolet curable resin in the same manner as in Example 1, and the obtained work body was cut and separated with a dicer to obtain each linear light source.
【００７７】図９は、本実施例２と上記実施例１の各緑
色発光素子２０ｇを１０ｍＡで駆動したときの輝度低下
曲線を示す。実施例２では、長寿命化のために正孔注入
層にＣｕＰｃとＨＰｃを用いたことと、有機電界発光素
子を覆った保護膜により、素子の駆動途中で短絡破壊や
層の剥離などが一層起こり難くなり、長寿命化が達成さ
れていることがわかる。FIG. 9 shows a luminance decrease curve when each green light emitting element 20g of the second embodiment and the first embodiment is driven at 10 mA. In Example 2, CuPc and HPc were used for the hole injecting layer for extending the life, and the protective film covering the organic electroluminescent element further prevented short circuit breakdown and layer peeling during driving of the element. It is difficult to occur, and it can be seen that a long life has been achieved.
【００７８】［実施例３：微小光共振器付き線状光源］
本実施例３では、多層膜ミラー（誘電体ミラー）、ＩＴ
Ｏ電極（第１電極）、有機層と金属電極（第２電極）と
によって微小光共振器を構成し（図８参照）、この共振
器の光学長が、増強目的波長（λ）とした緑色の５３５
ｎｍの２倍となるように素子設計した。[Example 3: Linear light source with micro optical resonator]
In the third embodiment, a multilayer film mirror (dielectric mirror), IT
A micro optical resonator is constituted by the O electrode (first electrode), the organic layer and the metal electrode (second electrode) (see FIG. 8), and the optical length of this resonator is the green for the enhancement target wavelength (λ). Of 535
The device was designed so as to have twice the nm.
【００７９】洗浄したガラスの素子基板１０上にマグネ
トロンスパッタ法によって屈折率の異なる誘電体のＳｉ
Ｏ2膜、ＴｉＯ2膜とを交互に形成し（交互に４回、合計
８層）、多層膜ミラー６０を形成した。ストップバンド
（多層膜ミラーの光反射波長領域）の中心波長は、５７
０ｎｍに設定し、ＳｉＯ2膜、ＴｉＯ2膜はそれぞれ９７
ｎｍ、６０ｎｍの厚さとした。このようにして得られた
多層膜ミラー６０の反射率は約９０％であった。On the cleaned glass element substrate 10, Si of a dielectric substance having a different refractive index is formed by the magnetron sputtering method.
An O 2 film and a TiO 2 film were alternately formed (4 times alternately, 8 layers in total) to form a multilayer film mirror 60. The center wavelength of the stop band (light reflection wavelength region of the multilayer mirror) is 57
It is set to 0 nm, and the SiO 2 film and the TiO 2 film are each 97
nm and 60 nm. The reflectance of the multilayer mirror 60 thus obtained was about 90%.
【００８０】次にこの多層膜ミラー６０の上に陽極（第
１電極２１０）としてＩＴＯ電極を上記増強目的波長λ
の約λ／４である１５０ｎｍの厚さに形成し、配線抵抗
を下げる為に補助電極を形成した。次にレジスト絶縁層
を発光領域（緑）と第２電極２１２取り出し部分が開口
するようパターニングした。このときの発光領域のサイ
ズは、線幅１．５ｍｍ、長さ（長手方向）８０ｍｍとし
た。Next, an ITO electrode is used as an anode (first electrode 210) on the multilayer film mirror 60 to enhance the target wavelength λ.
The thickness is about λ / 4, which is 150 nm, and an auxiliary electrode is formed to reduce the wiring resistance. Next, the resist insulating layer was patterned so that the light emitting region (green) and the extraction portion of the second electrode 212 were opened. The size of the light emitting region at this time was a line width of 1.5 mm and a length (longitudinal direction) of 80 mm.
【００８１】次に有機層用のシャドーマスクを用い、真
空蒸着（５×１０-7Ｔｏｒｒ）によって、ＣｕＰｃに１
０ｗｔ％のＨＰｃをドープした正孔注入層を１５ｎｍ積
層し、続いて、正孔輸送層としてＴＰＴＥを４５ｎｍ積
層した。さらに、緑色発光層の材料としてＡｌｑ3をホ
スト材料として用い、ＤＭＱｄをゲスト材料として０．
９ｗｔ％ドープしながら２０ｎｍの発光層を積層し、続
いて電子輸送層の材料としてＡｌｑ3をノンドープにて
３５ｎｍ蒸着した。Then, using a shadow mask for the organic layer, the CuPc was deposited to 1 by vacuum evaporation (5 × 10 −7 Torr).
A hole injection layer doped with 0 wt% HPc was deposited to a thickness of 15 nm, and subsequently TPTE was deposited to a thickness of 45 nm as a hole transport layer. Further, Alq 3 is used as a host material as a material of the green light emitting layer, and DMQd is used as a guest material of 0.1.
A 20-nm light-emitting layer was stacked while being 9 wt% doped, and subsequently, 35 nm of non-doped Alq 3 was vapor-deposited as a material for the electron transport layer.
【００８２】更にこの後、第２電極用のシャドーマスク
を用い、ＬｉＦを０．５ｎｍ、Ａｌを１５０ｎｍ蒸着
し、積層構造の金属第２電極（陰極）２１２を成膜し、
素子部を得た。この素子部の形成された素子基板１０を
高真空排気したチャンバに搬送し、チャンバー内を窒素
置換した後、光硬化性のエポキシ樹脂３０を用いて、ガ
ラスの封止基板４０を貼り合わせ、紫外線を照射して接
着した。封止基板４０を接着した後、複数の線状光源領
域を備えたワーク体からダイサーを用いて３．５ｍｍ幅
の線状光源を切断分離した。Further, after that, using a shadow mask for the second electrode, LiF was vapor-deposited to a thickness of 0.5 nm and Al was deposited to a thickness of 150 nm to form a metal second electrode (cathode) 212 having a laminated structure.
The element part was obtained. The element substrate 10 on which this element portion is formed is transferred to a chamber that has been evacuated to a high vacuum, and the inside of the chamber is replaced with nitrogen. Then, a glass sealing substrate 40 is attached using a photo-curable epoxy resin 30 and ultraviolet rays are applied. Was irradiated to bond. After adhering the sealing substrate 40, a linear light source having a width of 3.5 mm was cut and separated from a work body having a plurality of linear light source regions using a dicer.
【００８３】以上のようにして得られた実施例３の線状
光源に対し、その発光領域を構成する緑色発光を示す有
機電界発光素子２０の第１第２電極（陽極−陰極）間に
１０Ｖ直流電圧を印加したところ、素子前方（素子基板
の素子非形成面における法線方向）に指向性を有する５
３５ｎｍの緑色発光が得られた。素子前方での発光輝度
は、多層膜ミラーを形成しない素子と比較して１．５倍
程度になった。また微小光共振器の効果により、緑色発
光のスペクトルの半値幅も狭くなり、非常に色純度の良
い緑色を示す線状光源が得られた。With respect to the linear light source of Example 3 obtained as described above, 10 V was applied between the first and second electrodes (anode-cathode) of the organic electroluminescence device 20 which emits green light and constitutes the light emitting region. When a DC voltage was applied, it had directivity in front of the element (normal direction to the element-non-formed surface of the element substrate).
A green emission of 35 nm was obtained. The emission brightness in front of the device was about 1.5 times that of the device without the multilayer mirror. Also, due to the effect of the micro-optical resonator, the half width of the spectrum of green emission was narrowed, and a linear light source showing green with very good color purity was obtained.
【００８４】[0084]
【発明の効果】以上説明したように、この発明において
は、有機電界発光素子を用いて、例えば長短比１０対１
以上もあるような非常に細長い線状光源を実現できる。
またこの線状光源を製造するにあたり、有機電界発光素
子は素子基板、封止基板及び樹脂によって封止されてお
り、外気や水にさらされることなく、即ち有機電界発光
素子に劣化を起こすことなくこの線状光源を得ることが
できる。また有機電界発光素子を発光素子として用いる
ことにより、設定された発光領域内における面発光が可
能であり、面内で均一性の高い線状光源を実現すること
ができる。As described above, according to the present invention, the organic electroluminescent device is used, and for example, the long / short ratio is 10: 1.
It is possible to realize a very elongated linear light source as described above.
Further, in manufacturing this linear light source, the organic electroluminescent element is sealed with an element substrate, a sealing substrate and a resin, and thus is not exposed to the outside air or water, that is, without causing deterioration of the organic electroluminescent element. This linear light source can be obtained. Further, by using the organic electroluminescent element as a light emitting element, it is possible to perform surface light emission within a set light emitting region, and it is possible to realize a linear light source having high in-plane uniformity.
【図１】 本発明の実施形態１に係る線状光源の概略平
面構成を示す図である。FIG. 1 is a diagram showing a schematic plan configuration of a linear light source according to a first embodiment of the invention.
【図２】 図１のＡ−Ａ線に沿った概略断面構成を示す
図である。FIG. 2 is a diagram showing a schematic cross-sectional configuration along the line AA of FIG.
【図３】 図１のＢ−Ｂ線に沿った概略断面構成を示す
図である。3 is a diagram showing a schematic cross-sectional configuration along the line BB of FIG.
【図４】 本発明の線状光源の製造工程を説明するため
のワーク体の概略構成図である。FIG. 4 is a schematic configuration diagram of a work body for explaining the manufacturing process of the linear light source of the present invention.
【図５】 本発明の実施形態２に係る線状光源の線幅方
向における概略断面構成を示す図である。FIG. 5 is a diagram showing a schematic cross-sectional configuration in a line width direction of a linear light source according to a second embodiment of the invention.
【図６】 本発明の実施形態３に係る多色発光線状光源
の概略平面構成を示す図である。FIG. 6 is a diagram showing a schematic plan configuration of a multicolor linear light source according to a third embodiment of the invention.
【図７】 図６のＣ−Ｃ線に沿った概略断面構成を示す
図である。7 is a diagram showing a schematic cross-sectional configuration along the line CC of FIG.
【図８】 本発明の実施形態４に係る光共振器付きの線
状光源の線幅方向における概略断面構成を示す図であ
る。FIG. 8 is a diagram showing a schematic sectional configuration in a line width direction of a linear light source with an optical resonator according to a fourth embodiment of the present invention.
【図９】 実施例１及び実施例２に係る線状光源の寿命
を示す図である。FIG. 9 is a diagram showing the life of the linear light source according to the first and second embodiments.
１０ 素子基板、２０ 有機電界発光素子、３０ 樹
脂、４０ 封止基板、５０ 保護膜（有機保護膜、無機
保護膜）、６０ 誘電体ミラー（多層膜ミラー）、１０
０ 線状光源、２１０ 第１電極（ＩＴＯ電極、陽
極）、２１２ 第２電極（金属電極、陰極）、２１４
引き出し配線、２２０ 有機層、２３０ 絶縁層。10 element substrate, 20 organic electroluminescent element, 30 resin, 40 sealing substrate, 50 protective film (organic protective film, inorganic protective film), 60 dielectric mirror (multilayer film mirror), 10
0 linear light source, 210 first electrode (ITO electrode, anode), 212 second electrode (metal electrode, cathode), 214
Lead wire, 220 organic layer, 230 insulating layer.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０５Ｂ 33/12 Ｈ０５Ｂ 33/12 Ｂ 33/14 33/14 Ｂ 33/22 33/22 Ｂ Ｄ 33/24 33/24 (72)発明者 森 朋彦 愛知県愛知郡長久手町大字長湫字横道41番 地の１ 株式会社豊田中央研究所内 (72)発明者 明渡 邦夫 愛知県愛知郡長久手町大字長湫字横道41番 地の１ 株式会社豊田中央研究所内 (72)発明者 鈴木 基史 愛知県愛知郡長久手町大字長湫字横道41番 地の１ 株式会社豊田中央研究所内 (72)発明者 多賀 康訓 愛知県愛知郡長久手町大字長湫字横道41番 地の１ 株式会社豊田中央研究所内 Ｆターム(参考） 3K007 AB04 AB11 AB15 AB17 AB18 BA01 BB01 BB02 CA01 CB01 CB04 DA01 DB03 EB00 FA02─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) H05B 33/12 H05B 33/12 B 33/14 33/14 B 33/22 33/22 B D 33/24 33/24 (72) Inventor Tomohiko Mori Nagakute-cho, Aichi-gun, Aichi Prefecture 1-41 Yokomichi, Yokosui Central Research Institute, Toyota Co., Ltd. (72) Inventor Kunio Akido 41, Nagakute-machi, Aichi-gun, Nagakute-machi Address 1 Toyota Central Research Institute Co., Ltd. (72) Inventor Motofumi Suzuki Motofumi Nagakute-cho, Aichi-gun, Aichi Prefecture 41 No. 1 Yokoido, Toyota Central Research Institute Inc. (72) Inventor Yasunori Taga Nagakute, Aichi-gun Aichi 1 in 41, Yokomichi, Nagamachi, Chuo-cho, F-term, Toyota Central Research Institute Co., Ltd. (reference) 3K007 AB04 AB11 AB15 AB17 AB18 BA01 BB01 BB02 CA01 CB01 CB04 DA01 DB03 EB00 FA02
Claims (9)
発光領域が有機電界発光素子から構成された線状光源で
あって、 前記有機電界発光素子が形成された素子基板と、前記素
子基板の前記有機電界発光素子形成側に接着材料によっ
て接着され前記有機電界発光素子を封止する封止基板と
を備え、 前記素子基板と前記封止基板とは、光源長辺において端
面が一致することを特徴とする線状光源。1. A linear light source in which a linear self-luminous region formed along a longitudinal direction of a light source is composed of an organic electroluminescent element, the element substrate having the organic electroluminescent element formed thereon, and the element. A sealing substrate that is adhered to the organic electroluminescent element formation side of the substrate with an adhesive material to seal the organic electroluminescent element, and the element substrate and the sealing substrate have end faces that coincide with each other on the long side of the light source. A linear light source characterized by the above.
発光領域が有機電界発光素子から構成された線状光源の
製造方法であって、 大型の素子基板上の複数の線状光源形成領域にそれぞれ
有機電界発光素子を形成し、 前記素子基板上に接着材料により複数の前記有機電界発
光素子を覆うように大型の封止基板を接着し、 前記有機電界発光素子を間に封止して接着された前記素
子基板と前記封止基板とを各線状光源の長辺に相当する
位置で切断し各線状光源を分離することを特徴とする線
状光源の製造方法。2. A method of manufacturing a linear light source in which a linear self-luminous region formed along a light source longitudinal direction is composed of an organic electroluminescent element, wherein a plurality of linear light sources are formed on a large element substrate. An organic electroluminescent device is formed in each area, and a large sealing substrate is bonded onto the device substrate with an adhesive material so as to cover the plurality of organic electroluminescent devices, and the organic electroluminescent device is sealed between them. A method of manufacturing a linear light source, characterized in that the element substrate and the sealing substrate adhered together are cut at a position corresponding to a long side of each linear light source to separate each linear light source.
電界発光素子の長短比は１０対１以上であることを特徴
とする請求項１又は請求項２に記載の線状光源またはそ
の製造方法。3. The linear light source according to claim 1 or 2, wherein the organic electroluminescent element forming the linear self-luminous region has a length-to-short ratio of 10: 1 or more. Method.
ある樹脂との間には、さらに前記有機電界発光素子を覆
う保護膜を備えることを特徴とする請求項１〜請求項３
のいずれかに記載の線状光源又はその製造方法。4. The protective film, which covers the organic electroluminescent device, is further provided between the organic electroluminescent device and the resin as the adhesive material.
The linear light source according to any one of claims 1 to 3, or a method for manufacturing the same.
の層間には、誘電体ミラーが設けられ、該誘電体ミラー
と前記有機電界発光素子とによって光共振器が構成され
ていることを特徴とする請求項１〜請求項４のいずれか
一つに記載の線状光源またはその製造方法。5. A dielectric mirror is provided between the element substrate and the organic electroluminescent element, and an optical resonator is constituted by the dielectric mirror and the organic electroluminescent element. The linear light source according to any one of claims 1 to 4 or a manufacturing method thereof.
状自発光領域を同一線状光源中に備え、各線状自発光領
域には対応する色を発光する有機電界発光素子が形成さ
れていることを特徴とする請求項１〜請求項５のいずれ
かに記載の線状光源又はその製造方法。6. A plurality of linear self-luminous regions each emitting light of a different color are provided in the same linear light source, and each linear self-luminous region is formed with an organic electroluminescent element that emits a corresponding color. The linear light source according to any one of claims 1 to 5, or a method for manufacturing the linear light source.
て下記一般式（ｉ） 【化１】 に示されるピレン誘導体化合物が用いられていることを
特徴とする請求項１〜請求項６のいずれか一つに記載の
線状光源又はその製造方法。7. A material represented by the following general formula (i): as a light emitting layer material of the organic electroluminescent device. The linear light source according to any one of claims 1 to 6 or the method for producing the linear light source, wherein the pyrene derivative compound shown in 1 is used.
て下記一般式（ｉｉ） 【化２】 に示されるジビニルキノリン誘導体化合物が用いられて
いることを特徴とする請求項１〜請求項７のいずれか一
つに記載の線状光源又はその製造方法。8. A light emitting layer material of the organic electroluminescent device, represented by the following general formula (ii): The linear light source according to any one of claims 1 to 7 or a method for producing the linear light source, wherein the divinylquinoline derivative compound shown in (1) is used.
機層を備え、前記透明電極と前記有機層との層間に、金
属ポルフィリン誘導体化合物αと該化合物αより極性が
小さくかつ該化合物αと親和性を備えた化合物βとの混
合層が設けられているか、又は前記化合物αを含む層及
び前記化合物βを含む層が設けられていることを特徴と
する請求項１〜請求項８のいずれかに記載の線状光源ま
たはその製造方法。9. The organic electroluminescent device comprises a transparent electrode and an organic layer, and a metalloporphyrin derivative compound α and a compound having a polarity smaller than that of the compound α and having an affinity with the compound α are provided between the transparent electrode and the organic layer. 9. A mixed layer with a compound β having a property is provided, or a layer containing the compound α and a layer containing the compound β are provided. The linear light source according to claim 1 or a method for manufacturing the same.
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| JPWO2005122646A1 (en) * | 2004-06-14 | 2008-04-10 | 独立行政法人産業技術総合研究所 | Linear light emitter, linear light emitting device, and method of manufacturing linear light emitter |
| JP2007059209A (en) * | 2005-08-24 | 2007-03-08 | Toyota Industries Corp | Electroluminescence panel and method for manufacturing the same |
| US7928537B2 (en) | 2006-03-31 | 2011-04-19 | Fujifilm Corporation | Organic electroluminescent device |
| JP2008218323A (en) * | 2007-03-07 | 2008-09-18 | Canon Inc | Manufacturing method of organic EL panel |
| US8557067B2 (en) | 2007-03-07 | 2013-10-15 | Canon Kabushiki Kaisha | Method for manufacturing organic electroluminescence panel |
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| WO2012050043A1 (en) * | 2010-10-15 | 2012-04-19 | 日東電工株式会社 | Organic electro-luminescence light-emitting device and production method of same |
| JP2012104474A (en) * | 2010-10-15 | 2012-05-31 | Nitto Denko Corp | Organic electroluminescent light-emitting device and manufacturing method thereof |
| WO2012164612A1 (en) * | 2011-05-31 | 2012-12-06 | パナソニック株式会社 | Method for manufacturing joined body, and joined body |
| US9156206B2 (en) | 2011-05-31 | 2015-10-13 | Joled Inc. | Method for manufacturing joined body, and joined body |
| JP5990745B2 (en) * | 2011-05-31 | 2016-09-14 | 株式会社Ｊｏｌｅｄ | Manufacturing method of joined body and joined body |
| WO2014147789A1 (en) * | 2013-03-21 | 2014-09-25 | 株式会社島津製作所 | Organic electroluminescence device, organic electroluminescence device manufacturing method, and film forming method |
| JP2019532326A (en) * | 2016-12-09 | 2019-11-07 | エルジー・ケム・リミテッド | Sealant composition |
| US10913874B2 (en) | 2016-12-09 | 2021-02-09 | Lg Chem, Ltd. | Encapsulating composition |
| CN109689775B (en) * | 2016-12-09 | 2021-07-13 | 株式会社Lg化学 | encapsulation composition |
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