JP2003203760A - Organic electroluminescence display device - Google Patents
Organic electroluminescence display deviceInfo
- Publication number
- JP2003203760A JP2003203760A JP2002001005A JP2002001005A JP2003203760A JP 2003203760 A JP2003203760 A JP 2003203760A JP 2002001005 A JP2002001005 A JP 2002001005A JP 2002001005 A JP2002001005 A JP 2002001005A JP 2003203760 A JP2003203760 A JP 2003203760A
- Authority
- JP
- Japan
- Prior art keywords
- organic
- display device
- light
- transparent
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005401 electroluminescence Methods 0.000 title claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 17
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 15
- 239000011159 matrix material Substances 0.000 claims abstract description 7
- 239000006229 carbon black Substances 0.000 claims description 5
- 229920001721 polyimide Polymers 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000002265 prevention Effects 0.000 abstract description 5
- 238000002834 transmittance Methods 0.000 description 9
- 230000005525 hole transport Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- -1 amino-substituted chalcone derivatives Chemical class 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
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- 238000007740 vapor deposition Methods 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
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- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 150000004866 oxadiazoles Chemical class 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
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- 229910052709 silver Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- VERMWGQSKPXSPZ-BUHFOSPRSA-N 1-[(e)-2-phenylethenyl]anthracene Chemical class C=1C=CC2=CC3=CC=CC=C3C=C2C=1\C=C\C1=CC=CC=C1 VERMWGQSKPXSPZ-BUHFOSPRSA-N 0.000 description 1
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229920003319 Araldite® Polymers 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000799 K alloy Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000008425 anthrones Chemical class 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
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- 150000008376 fluorenones Chemical class 0.000 description 1
- 229940083761 high-ceiling diuretics pyrazolone derivative Drugs 0.000 description 1
- 150000007857 hydrazones Chemical class 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
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- 229920000767 polyaniline Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical class O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 1
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- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical class C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
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- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical class C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 229940042055 systemic antimycotics triazole derivative Drugs 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、携帯端末の表示部
やその他のディスプレイ装置等に使用できる有機エレク
トロルミネッセンス表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescence display device that can be used for a display unit of a mobile terminal, other display devices and the like.
【０００２】[0002]
【従来の技術】エレクトロルミネッセンス（以下ＥＬと
いう）素子を用いた表示装置は、自発光型のため視認性
が高く、また完全固体素子を用いるため耐衝撃性に優れ
ている等の特徴を有することから注目されている。この
ＥＬ素子には、無機化合物を用いた無機ＥＬ素子と有機
化合物を用いた有機ＥＬ素子とがあり、このうち有機Ｅ
Ｌ素子は印加電圧を大幅に低くすることができるので、
次世代の発光素子としてその実用化研究が積極的になさ
れている。2. Description of the Related Art A display device using an electroluminescence (hereinafter referred to as EL) element is characterized by high visibility because it is a self-luminous type and excellent impact resistance because it uses a completely solid state element. Has been attracting attention. This EL element includes an inorganic EL element using an inorganic compound and an organic EL element using an organic compound.
Since the L element can significantly lower the applied voltage,
As a next-generation light emitting device, its practical research is being actively conducted.
【０００３】有機ＥＬ素子は有機発光材料からなる発光
層を含む有機化合物層と、この有機化合物層を挟持する
一対の電極から構成され、具体的には陽極／発光層／陰
極の構成を基本とし、これに正孔輸送層や電子輸送層を
適宜設けたもの、例えば陽極／正孔輸送層／発光層／陰
極や、陽極／正孔輸送層／発光層／電子輸送層／陰極な
どの構成のものが知られている。この正孔輸送層は、陽
極から注入された正孔を発光層に伝達する機能を有し、
また電子輸送層は、陰極より注入された電子を発光層に
伝達する機能を有している。これらの有機ＥＬ素子にお
いては、両電極間に３〜２０Ｖの直流電圧を印加する
と、陽極から正孔が、陰極から電子が有機化合物層に注
入され、正孔と電子の再結合により有機発光材料が発光
する。An organic EL element is composed of an organic compound layer including a light emitting layer made of an organic light emitting material, and a pair of electrodes sandwiching the organic compound layer. Specifically, the basic structure is anode / light emitting layer / cathode. A structure in which a hole transport layer or an electron transport layer is appropriately provided, such as an anode / hole transport layer / light emitting layer / cathode, or an anode / hole transport layer / light emitting layer / electron transport layer / cathode Things are known. This hole transport layer has a function of transmitting holes injected from the anode to the light emitting layer,
Further, the electron transport layer has a function of transmitting the electrons injected from the cathode to the light emitting layer. In these organic EL devices, when a DC voltage of 3 to 20 V is applied between both electrodes, holes are injected from the anode into the organic compound layer and electrons from the cathode into the organic compound layer, and the organic light emitting material is recombined with the holes and electrons. Emits light.
【０００４】[0004]
【本発明が解決しようとする課題】しかしながら、この
有機ＥＬ素子を用いた有機ＥＬ表示装置においては、有
機ＥＬ素子の有機化合物層の膜厚が非常に薄いため、陰
極材料に金属を用いた通常の構成においては、蒸着等に
より形成した陰極電極表面は非常に平滑で鏡面となって
いるので外光が陰極で反射して視認されてしまう。した
がって外部からの光の陰極からの反射光により、コント
ラストが低下し、表示が見難くなるという問題があっ
た。However, in the organic EL display device using this organic EL element, since the film thickness of the organic compound layer of the organic EL element is extremely thin, it is usual to use a metal as the cathode material. In the above configuration, the surface of the cathode electrode formed by vapor deposition or the like is very smooth and has a mirror surface, so that external light is reflected by the cathode and is visually recognized. Therefore, there is a problem that the contrast is lowered due to the reflected light from the cathode of the light from the outside, and the display becomes difficult to see.
【０００５】このような問題を解決するために、特開平
８−３２１３８１号公報には電極の外側に円偏光板を有
する有機ＥＬ表示装置が開示されている。しかしなが
ら、この有機ＥＬ表示装置においては光取り出し面全領
域において円偏光板を設置するために、輝度の低下が問
題とされていた。In order to solve such a problem, Japanese Unexamined Patent Publication No. 8-321381 discloses an organic EL display device having a circularly polarizing plate outside the electrodes. However, in this organic EL display device, since the circularly polarizing plate is installed in the entire area of the light extraction surface, there has been a problem that the brightness is lowered.
【０００６】その他にも、陽極をパターンニングした
後、そのギャップ部分に電気絶縁性を有するブラックレ
ジストによりブラックマトリックスを形成しコントラス
トを向上させた有機ＥＬ表示装置が提案されているが、
電極間の微細なブラックマトリックスを形成するための
工程の複雑化（露光、アルカリ現像等）が問題とされて
いた。In addition to the above, an organic EL display device has been proposed in which after patterning the anode, a black matrix is formed in the gap portion by a black resist having an electrically insulating property to improve the contrast.
A complicated process (exposure, alkali development, etc.) for forming a fine black matrix between electrodes has been a problem.
【０００７】本発明は上記課題に鑑みなされたものであ
り、外光の反射によるコントラストの低下防止と、それ
による輝度の低下防止を両立させ、しかも簡便なプロセ
スにより製造可能な有機ＥＬ表示装置を提供することに
ある。The present invention has been made in view of the above-mentioned problems, and provides an organic EL display device that can prevent the deterioration of the contrast caused by the reflection of external light and the deterioration of the brightness caused thereby, and can be manufactured by a simple process. To provide.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
の発明は、透明基板上に、有機発光材料からなる発光層
を含む有機化合物層を一対の電極間に介在させた画素部
をマトリクス状に複数配置し、前記一対の電極のうちの
少なくとも前記透明基板側の電極は透明である有機エレ
クトロルミネッセンス表示装置において、前記透明基板
の前記画素部が形成された面とは反対側の面に、前記画
素部と相対する位置に選択的に透明部分を有する遮光性
フィルムが被着していることを特徴とする。SUMMARY OF THE INVENTION The invention for solving the above-mentioned problems is achieved by forming a matrix of pixel portions in which an organic compound layer including a light emitting layer made of an organic light emitting material is interposed between a pair of electrodes on a transparent substrate. In the organic electroluminescence display device in which a plurality of electrodes are disposed on at least the transparent substrate side of the pair of electrodes, in the surface opposite to the surface on which the pixel portion of the transparent substrate is formed, It is characterized in that a light-shielding film selectively having a transparent portion is attached to a position facing the pixel portion.
【０００９】本発明は、上記発明において、「前記透明
部分の大きさは、前記画素部の大きさと同じであるこ
と」、「前記フィルムは可視光波長の光を吸収するフィ
ルムであること」、をその好ましい態様として含み、さ
らには「前記フィルムはカーボンブラックを含有したポ
リイミドフィルムであること」、又は、「前記フィルム
は中性フィルタであること」をその好ましい態様として
含むものである。According to the present invention, in the above invention, "the size of the transparent portion is the same as the size of the pixel portion", "the film is a film that absorbs light having a visible light wavelength", Is included as a preferred embodiment thereof, and further, "the film is a polyimide film containing carbon black" or "the film is a neutral filter".
【００１０】[0010]
【発明の実施の形態】図１、図２を用いて本発明の有機
ＥＬ表示装置の具体的な実施の形態を説明する。図１は
本発明の有機ＥＬ表示装置の一実施形態の構成を示す平
面透視図であり、図２は図１のＡ−Ａ’断面図である。
図１、図２において、１は遮光性フィルム、２及び２ａ
〜２ｅは電極、３及び３ａ〜３ｅは透明電極、４は透明
基板、５は画素部、６は透明部分、７は有機化合物層で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of the organic EL display device of the present invention will be described with reference to FIGS. FIG. 1 is a plan perspective view showing a configuration of an embodiment of the organic EL display device of the present invention, and FIG. 2 is a sectional view taken along line AA ′ of FIG.
1 and 2, 1 is a light-shielding film, 2 and 2a
2e is an electrode, 3 and 3a to 3e are transparent electrodes, 4 is a transparent substrate, 5 is a pixel portion, 6 is a transparent portion, and 7 is an organic compound layer.
【００１１】本発明の有機ＥＬ表示装置は、透明基板４
の画素部５が形成された面とは反対側の面に遮光性フィ
ルム１が被着しており、図に示すように画素部５と相対
する位置に選択的に透明部分６を有することを特徴とし
ている。ここで画素部とは、一対の電極間に有機発光材
料からなる発光層を含む有機化合物層を介在させた領域
を指しており、図１に示すようにマトリクス状に複数配
置される。The organic EL display device of the present invention comprises a transparent substrate 4
The light-shielding film 1 is attached to the surface opposite to the surface on which the pixel portion 5 is formed, and the transparent portion 6 is selectively provided at the position facing the pixel portion 5 as shown in the figure. It has a feature. Here, the pixel portion refers to a region in which an organic compound layer including a light emitting layer made of an organic light emitting material is interposed between a pair of electrodes, and a plurality of pixels are arranged in matrix as shown in FIG.
【００１２】このような構成によれば、外光の有機ＥＬ
表示装置内への入射量を減少させ、且つ画素部（特に通
常、金属を用いた陰極である電極２）において反射した
外光の外部への出射量を減少させることができ、しかも
画素部において発せられた光は透明部分から輝度をほと
んど減少させることなく取り出すことができる。即ち、
外光の反射によるコントラストの低下防止と、それによ
る輝度の低下防止を両立させることができる。According to such a configuration, the organic EL of external light
The amount of incident light into the display device can be reduced, and the amount of external light reflected at the pixel portion (particularly, the electrode 2 which is usually a cathode using a metal) to the outside can be reduced, and moreover, in the pixel portion. The emitted light can be extracted from the transparent part with almost no reduction in brightness. That is,
It is possible to achieve both prevention of reduction in contrast due to reflection of external light and prevention of reduction in luminance due to it.
【００１３】しかも、遮光性フィルム１は、後述の具体
例に示すように簡便な方法によって被着させることがで
き、製造プロセスを簡略化できることにもなる。Moreover, the light-shielding film 1 can be applied by a simple method as will be described later, and the manufacturing process can be simplified.
【００１４】遮光性フィルム１は、例えばカーボンブラ
ックを含有したポリイミドフィルムに代表されるような
４００〜７００ｎｍの可視光波長の光を吸収するものが
よい。他の例としては中性フィルタ（ＮＤフィルタとも
いう）を使用することも可能である。The light-shielding film 1 preferably absorbs light having a visible light wavelength of 400 to 700 nm as represented by a polyimide film containing carbon black. As another example, a neutral filter (also called an ND filter) can be used.
【００１５】透明部分６は、透明基板４の画素部５が形
成された面とは反対側の面（光取り出し側の面）に、画
素部５と相対する位置に選択的に設けられていれば良
く、図１に示すように同じ大きさ、形状である必要はな
いが、外光を最大限遮断し、且つ画素部において発せら
れた光を最大限とりだすためには、画素部の大きさと同
じであることが好ましい。さらに透明部分６は完全に透
明でなくても良く、画素部において発せられた光を外部
に十分な輝度で放射できる程度に透明であればよい。The transparent portion 6 may be selectively provided on the surface of the transparent substrate 4 opposite to the surface on which the pixel portion 5 is formed (the surface on the light extraction side) at a position facing the pixel portion 5. It does not have to have the same size and shape as shown in FIG. 1, but in order to block the external light to the maximum and extract the light emitted from the pixel to the maximum, It is preferably the same. Furthermore, the transparent portion 6 does not have to be completely transparent as long as it is transparent to the extent that the light emitted from the pixel portion can be emitted to the outside with sufficient brightness.
【００１６】透明部分６は、遮光性フィルムを透明基板
に被着する前に、画素部に対応する部分をプレス加工す
ることにより取り除けば形成することが可能である。ま
た、褪光性のある遮光性フィルムを用いる場合は、ステ
ンレス製のメカマスク等を用いてマスキングを行い、透
明部分を形成する範囲を紫外線照射により褪光させ、十
分な光透過率を確保することにより作製することも可能
である。即ち、透明部分は、遮光性フィルムに空けられ
た穴であっても良いし、遮光性フィルムと一体の光透過
性フィルムの部分であっても良い。The transparent portion 6 can be formed by removing the portion corresponding to the pixel portion by pressing before applying the light-shielding film to the transparent substrate. When using a light-blocking light-shielding film, mask it with a mechanical mask made of stainless steel, etc., and illuminate the range forming the transparent part with ultraviolet light to ensure sufficient light transmittance. It is also possible to produce by. That is, the transparent portion may be a hole formed in the light-shielding film or a portion of the light-transmitting film integrated with the light-shielding film.
【００１７】ここで、遮光性フィルムに対して、プレス
加工等により透明基板に被着する前に穴空けを行った場
合の、遮光性フィルムを透明基板に貼り付ける方法の好
ましい例を示しておく。Here, a preferable example of a method of attaching the light-shielding film to the transparent substrate when the light-shielding film is perforated before being attached to the transparent substrate by pressing or the like will be shown. .
【００１８】まず、予め使用する透明基板上に透明電極
(陽極)を形成する際、同時に透明電極と同じ材料で、画
素部が形成された領域以外の適切な場所に少なくとも2
箇所以上、後でフィルムの四隅を位置合わせすることを
考慮すると好ましくは４箇所に、パターンニング等によ
り位置合わせマークを配置しておく。発光層を成膜した
後に形成される電極（陰極）は、前記の位置合わせマー
クを基準として配置する。その結果、形成された複数の
各画素部は前記の位置合わせマークを基準とした位置に
構成されることになる。First, a transparent electrode is formed on a transparent substrate to be used in advance.
When forming the (anode), at the same time, use the same material as the transparent electrode and at least 2 at a suitable place other than the area where the pixel part
Considering that the four corners of the film will be aligned later than above, preferably four alignment marks are arranged by patterning or the like. The electrode (cathode) formed after forming the light emitting layer is arranged with the alignment mark as a reference. As a result, each of the formed plurality of pixel portions is formed at a position based on the alignment mark.
【００１９】成膜後、透明基板の光取り出し側の面に前
記遮光性フィルムを貼り付ける際、顕微鏡等で確認しな
がら前記位置合わせマークを基準として遮光性フィルム
の四隅を合わせて接着剤等で固定する。このような手段
を採ることにより前記遮光性フィルムと各画素部との位
置が位置合わせマークとの相対的な位置合わせにより決
定され、精度よく貼り付けることが可能である。遮光性
フィルムの位置固定時にさらに各画素部と中抜き穴との
位置を確認するとさらに良い。After the film formation, when the light-shielding film is attached to the surface of the transparent substrate on the light extraction side, the four corners of the light-shielding film are aligned with an adhesive or the like while checking with a microscope etc. Fix it. By adopting such means, the positions of the light-shielding film and the respective pixel portions are determined by the relative alignment with the alignment marks, and it is possible to attach them accurately. It is more preferable to confirm the positions of the pixel portions and the hollow holes when fixing the position of the light-shielding film.
【００２０】次に有機ＥＬ表示装置のその他の構成につ
いて説明する。Next, other configurations of the organic EL display device will be described.
【００２１】透明基板４上に形成される透明電極３およ
び有機発光材料からなる発光層を含む有機化合物層７を
介して対向する電極２は、従来より用いられている有機
ＥＬ表示装置用の陽極材料および陰極材料がそのまま利
用できる。そして、透明電極３と電極２との間に電位差
を与えることにより有機発光材料を発光させる。このよ
うな層構成や発光のさせ方は公知のものである。The electrode 2 facing the transparent electrode 3 formed on the transparent substrate 4 and the organic compound layer 7 including a light emitting layer made of an organic light emitting material is an anode for a conventional organic EL display device. The material and the cathode material can be used as they are. Then, the organic light emitting material is caused to emit light by applying a potential difference between the transparent electrode 3 and the electrode 2. Such a layer structure and a method of emitting light are known.
【００２２】透明電極３（陽極電極）の材料としては、
無機材料では金属、合金、酸化物などの、光透過性があ
り且つ仕事関数が大きい（４ｅＶ以上）材料、具体的に
はＣｕＩ、ＩＴＯ、ＳｎＯ2、ＺｎＯなどが挙げられ
る。また、有機材料では、ポリアニリンなどが挙げられ
る。As the material of the transparent electrode 3 (anode electrode),
Examples of the inorganic material include materials such as metals, alloys, and oxides, which are light-transmissive and have a large work function (4 eV or more), specifically CuI, ITO, SnO 2 , ZnO and the like. In addition, examples of the organic material include polyaniline.
【００２３】また、電極２（陰極電極）としては、仕事
関数の小さい（４ｅＶ以下）金属、金属合金、などで、
具体的にはマグネシウム、マグネシウムと銀との合金、
ナトリウム、ナトリウムとカリウムとの合金、アルミニ
ウムとリチウムとの合金、インジウムや希土類金属など
が挙げられる。As the electrode 2 (cathode electrode), a metal or metal alloy having a small work function (4 eV or less) is used.
Specifically, magnesium, an alloy of magnesium and silver,
Examples thereof include sodium, an alloy of sodium and potassium, an alloy of aluminum and lithium, indium and a rare earth metal.
【００２４】相対的に陽極の仕事関数の方が陰極の仕事
関数よりも大きくなるように選択すれば良く、仕事関数
の大きさは４ｅＶに限定されるものではない。また、透
明電極３と電極２のシート抵抗値は共に数百Ω／□以下
であることが望ましい。The work function of the anode may be selected to be relatively larger than the work function of the cathode, and the size of the work function is not limited to 4 eV. Further, the sheet resistance values of the transparent electrode 3 and the electrode 2 are both preferably several hundreds Ω / □ or less.
【００２５】また透明電極３は、可視光波長（４００〜
７００ｎｍ程度）での透過率が大きいほど良く、例え
ば、ＩＴＯの場合５０００Å以下であれば透過率は８０
％以上で充分と言える。透過率が低いと実用上充分な輝
度が得られない。The transparent electrode 3 has a wavelength of visible light (400 to
The higher the transmittance at about 700 nm), the better. For example, in the case of ITO, if the transmittance is 5000 Å or less, the transmittance is 80
% Or more is enough. If the transmittance is low, practically sufficient brightness cannot be obtained.
【００２６】また、電極２としては、上記のような陰極
としての電子注入性にすぐれている材料が良いが、屋外
では太陽光が、また、室内では蛍光灯の光などの外光を
反射しやすい。The electrode 2 is preferably made of a material having excellent electron injecting property as the cathode as described above, but it reflects sunlight outdoors and indoor light such as fluorescent light. Cheap.
【００２７】有機化合物層は、有機発光材料からなる発
光層を必須構成層として介在させているものであれば制
限は無く、例えば一対の電極の間に正孔輸送層、有機発
光層、電子輸送層とを介在させているものを挙げること
ができる。The organic compound layer is not limited as long as it has a light emitting layer made of an organic light emitting material as an essential constituent layer. For example, a hole transport layer, an organic light emitting layer, and an electron transport layer are provided between a pair of electrodes. There may be mentioned those having a layer interposed therebetween.
【００２８】正孔輸送材料としては、トリアゾール誘導
体、オキサジアゾール誘導体、イミダゾール誘導体、フ
ェニレンジアミン誘導体、アリールアミン誘導体、ピラ
ゾリン誘導体、ピラゾロン誘導体、アニリン系共重合
体、ポリアリールアルカン誘導体、スチルベン誘導体、
ヒドラゾン誘導体、アミノ置換カルコン誘導体、オキサ
ゾール誘導体、スチリルアントランセン誘導体、フルオ
レノン誘導体、シラザン誘導体、ポリシラン系化合物な
どが挙げられる。As the hole transport material, triazole derivatives, oxadiazole derivatives, imidazole derivatives, phenylenediamine derivatives, arylamine derivatives, pyrazoline derivatives, pyrazolone derivatives, aniline copolymers, polyarylalkane derivatives, stilbene derivatives,
Examples thereof include hydrazone derivatives, amino-substituted chalcone derivatives, oxazole derivatives, styrylanthracene derivatives, fluorenone derivatives, silazane derivatives, and polysilane compounds.
【００２９】有機発光材料としては、ベンゾチアゾール
系、金属キレート化オキシノイド化合物、スチルベンゼ
ン系化合物、芳香族ジメチルリジン化合物、ジスチルピ
ラジン誘導体ベンゾイミダゾール系、ベンゾオイサゾー
ル系などが挙げられる。電子注入材料としては、ニトロ
置換フルオレノン誘導体、アントラキノジメタン誘導
体、チオピランジオイシド誘導体などの複素環テトラカ
ルボン酸無水物、フレオレニリンデンメタン誘導体、オ
キサジアゾール誘導体、８−キノリノール誘導体、カル
ボジイミド、アントロン誘導体などが挙げられる。Examples of the organic light emitting material include benzothiazole-based compounds, metal chelated oxinoid compounds, stilbenzene-based compounds, aromatic dimethyl lysine compounds, distilpyrazine derivatives benzimidazole-based compounds, and benzooisazole-based compounds. Examples of the electron injection material include heterocyclic tetracarboxylic acid anhydrides such as nitro-substituted fluorenone derivatives, anthraquinodimethane derivatives, and thiopyrandioiside derivatives, fluorenylindenemethane derivatives, oxadiazole derivatives, 8-quinolinol derivatives, carbodiimides. , Anthrone derivatives and the like.
【００３０】[0030]
【実施例】以下、本発明の実施例について説明する。EXAMPLES Examples of the present invention will be described below.
【００３１】（実施例１）有機ＥＬ表示装置の作製につ
いて図面を参照して図１及び図２と同じ構成の実施例を
詳細に説明する。まず５０ｍｍ×５０ｍｍ×１．０ｍｍ
の透明ガラス基板上に膜厚１００ｎｍのＩＴＯ膜を蒸着
法により成膜して透明電極を形成した。この基板の光透
過率を測定したところ、約７５％であった。この基板を
アセトン中で１０分間、イソプロピルアルコール中で１
０分間、純水中で１０分間それぞれ超音波洗浄し、クリ
ーンオーブン中で乾燥した後、ＵＶオゾン洗浄を２０分
間行った。(Embodiment 1) With reference to the drawings, an embodiment having the same structure as in FIGS. 1 and 2 will be described in detail with respect to the production of an organic EL display device. First, 50 mm x 50 mm x 1.0 mm
An ITO film having a thickness of 100 nm was formed on the transparent glass substrate of No. 3 by a vapor deposition method to form a transparent electrode. When the light transmittance of this substrate was measured, it was about 75%. This substrate is placed in acetone for 10 minutes and in isopropyl alcohol for 1 minute.
Ultrasonic cleaning was performed for 0 minutes each in pure water for 10 minutes, and after drying in a clean oven, UV ozone cleaning was performed for 20 minutes.
【００３２】次にこの基板を蒸着装置の基板ホルダーに
セットする一方で、モリブデン製の抵抗加熱ボートに
Ｎ，Ｎ’−ビス（３−メチルフェニル）−Ｎ，Ｎ’−ジ
フェニル−（１，１’−ビフェニル）−４，４’−ジア
ミン（以下、ＴＰＤと略記する）を１００ｍｇ入れ、ま
た違うモリブデン製の抵抗加熱ボートにトリス（８−キ
ノリノール）アルミニウム（以下Ａｌｑと略記する）を
６０ｍｇ入れ用意した。Next, while this substrate was set in the substrate holder of the vapor deposition apparatus, N, N'-bis (3-methylphenyl) -N, N'-diphenyl- (1,1) was placed in a resistance heating boat made of molybdenum. Prepare 100 mg of'-biphenyl) -4,4'-diamine (hereinafter abbreviated as TPD), and another 60 mg of molybdenum resistance heating boat with tris (8-quinolinol) aluminum (hereinafter abbreviated as Alq). did.
【００３３】また、違うモリブデン製ボートにマグネシ
ウムリボンを１ｇ入れ、さらにタングステンバスケット
に銀ワイヤーを５００ｍｇ入れて、これらのボートを真
空層中の抵抗加熱電極に装着した。この後、真空層を１
×１０-4Ｐａまで減圧した。Further, 1 g of magnesium ribbon was placed in a different molybdenum boat, and 500 mg of silver wire was placed in a tungsten basket, and these boats were attached to the resistance heating electrodes in the vacuum layer. Then vacuum layer 1
The pressure was reduced to × 10 −4 Pa.
【００３４】この後、ＴＰＤ入りの前記ボートを抵抗加
熱により加熱し、ＴＰＤを蒸着速度３Å／ｓで前記ＩＴ
Ｏ膜上に３００Å蒸着させて正孔輸送層を形成した。次
にＡｌｑ入りの前記ボートを抵抗加熱により加熱し、Ａ
ｌｑを蒸着速度３Å／ｓで前記ＴＰＤ膜上に５００Å蒸
着させて電子輸送層兼発光層を形成した。Thereafter, the TPD-containing boat is heated by resistance heating, and the TPD is deposited at the deposition rate of 3 Å / s by the IT.
A hole transport layer was formed by vapor-depositing 300Å on the O film. Next, the boat containing Alq is heated by resistance heating to
lq was vapor-deposited on the TPD film at an evaporation rate of 3Å / s to form an electron transport layer / light emitting layer.
【００３５】次いで、上記発光層の上に陰極蒸着用のス
テンレススチール製のマスクを設置した。その後、銀を
蒸着速度１Å／ｓで前記Ａｌｑ層上に蒸着させると同時
にマグネシウムを蒸着速度１２Å／ｓで前記Ａｌｑ層上
に蒸着させて、マグネシウムと銀の混合金属からなる膜
厚１５００Åの陰極を形成した。この対抗電極の反射率
を測定したところ、４００〜７００ｎｍの波長領域にお
いて８０％であった。Then, a stainless steel mask for cathode deposition was placed on the light emitting layer. Then, silver is vapor-deposited on the Alq layer at a vapor deposition rate of 1 Å / s, and at the same time magnesium is vapor-deposited on the Alq layer at a vapor deposition rate of 12 Å / s to form a cathode with a film thickness of 1500 Å made of a mixed metal of magnesium and silver. Formed. When the reflectance of this counter electrode was measured, it was 80% in the wavelength region of 400 to 700 nm.
【００３６】この後、ガラス基板の光取り出し側の面
（ＩＴＯ，有機多層膜等を積層した面とは反対側の面）
に遮光性フィルムとして、透明部分に対応する部分を除
去したカーボンブラックを含有したポリイミドフィルム
を接着剤（チバガイギー社製のアラルダイト）で被着さ
せて、目的とする有機ＥＬ表示装置を得た。After that, the surface of the glass substrate on the light extraction side (the surface opposite to the surface on which ITO, organic multilayer film, etc. are laminated)
As a light-shielding film, a polyimide film containing carbon black from which a portion corresponding to a transparent portion was removed was adhered with an adhesive (Araldite manufactured by Ciba-Geigy) to obtain a target organic EL display device.
【００３７】このようにして得られた有機ＥＬ表示装置
では、ガラス基板の一方の表面上に陽極としてのＩＴＯ
膜、正孔輸送層としてのＴＰＤ層、電子輸送層兼発光層
としてのＡｌｑ3層、および陰極としてのマグネシウム
−銀混合金属層が順次積層されており、ガラス基板の光
取り出し側の面（外側表面）の画素部に相対する位置以
外の部分にはカーボンブラックを含有したポリイミドフ
ィルムがマトリックス状に設けられている。なお、この
有機ＥＬ表示装置では、ＴＰＤ層、Ａｌｑ3層によって
有機化合物層が構成されている。In the organic EL display device thus obtained, ITO as an anode is formed on one surface of the glass substrate.
A film, a TPD layer serving as a hole transport layer, an Alq 3 layer serving as an electron transport layer and a light emitting layer, and a magnesium-silver mixed metal layer serving as a cathode are sequentially laminated, and a surface of the glass substrate on the light extraction side (outside) A polyimide film containing carbon black is provided in a matrix shape on a portion other than the position on the front surface) facing the pixel portion. In this organic EL display device, the organic compound layer is composed of the TPD layer and the Alq 3 layer.
【００３８】ここでコントラストを（発光時の輝度）／
（非発光時の輝度）と定義し、測定を行ったところ、遮
光性フィルム無しのものがコントラスト１８１であった
のに対し、本例で作成した遮光性フィルムを備えた有機
ＥＬ表示装置はコントラストが３７６となり、コントラ
ストが２倍以上に向上した。Here, the contrast is (luminance during light emission) /
It was defined as (luminance at the time of non-emission), and the measurement was carried out. The contrast was 181 without the light-shielding film, whereas the organic EL display device provided with the light-shielding film prepared in this example had a contrast. Was 376, and the contrast was more than doubled.
【００３９】（実施例２）遮光性フィルムとして、光透
過率１％のＮＤフィルタ（富士写真フィルム製ＮＤ２．
０）を使用した以外は実施例１と同様にして有機ＥＬ表
示装置を作製した。(Example 2) As the light-shielding film, an ND filter having a light transmittance of 1% (ND2.
An organic EL display device was produced in the same manner as in Example 1 except that (0) was used.
【００４０】この遮光性フィルムの透明部分を形成する
範囲の透過率を増加させるために、厚さ０．１ｍｍのＳ
ＵＳ３０４製のメカマスクを用いてマスキングを行い、
サンシャインカーボンアーク灯式促進耐候性試験機を用
いて紫外線を２４時間照射することにより、褪色させて
透明部分とした。その結果光透過率を８５％確保するこ
とができた。In order to increase the transmittance in the range where the transparent portion of this light-shielding film is formed, an S film having a thickness of 0.1 mm is used.
Masking using a mechanical mask made of US304,
Ultraviolet rays were radiated for 24 hours using a sunshine carbon arc lamp type accelerated weathering tester to cause fading to obtain transparent portions. As a result, a light transmittance of 85% could be secured.
【００４１】以上のように作製した遮光性フィルムを実
施例１と同様に配置して、所望の有機ＥＬ表示装置を得
ることができ、実施例１と同様な効果が得られた。By arranging the light-shielding film produced as described above in the same manner as in Example 1, a desired organic EL display device could be obtained, and the same effect as in Example 1 was obtained.
【００４２】[0042]
【発明の効果】以上説明したように本発明によれば、有
機ＥＬ表示装置において外光の反射によるコントラスト
の低下防止と、それによる輝度の低下防止を両立させる
ことができる。しかも、遮光性フィルムは簡便な方法に
よって被着させることができ、製造プロセスが簡略化可
能である。As described above, according to the present invention, in the organic EL display device, it is possible to prevent the reduction of the contrast due to the reflection of the external light and the reduction of the luminance due to the prevention. Moreover, the light-shielding film can be applied by a simple method, and the manufacturing process can be simplified.
【図１】本発明の有機ＥＬ表示装置の一実施形態の構成
を示す平面透視図である。FIG. 1 is a plan perspective view showing a configuration of an embodiment of an organic EL display device of the present invention.
【図２】図１のＡ−Ａ’断面図である。FIG. 2 is a cross-sectional view taken along the line A-A ′ of FIG.
１ 遮光性フィルム ２，２ａ〜２ｅ 電極 ３，３ａ〜３ｅ 透明電極 ４ 透明基板 ５ 画素部 ６ 透明部分 ７ 有機化合物層 1 Light-shielding film 2,2a-2e electrodes 3,3a-3e Transparent electrode 4 transparent substrate 5 pixels 6 transparent part 7 Organic compound layer
Claims (5)
光層を含む有機化合物層を一対の電極間に介在させた画
素部をマトリクス状に複数配置し、前記一対の電極のう
ちの少なくとも前記透明基板側の電極は透明である有機
エレクトロルミネッセンス表示装置において、 前記透明基板の前記画素部が形成された面とは反対側の
面に、前記画素部と相対する位置に選択的に透明部分を
有する遮光性フィルムが被着していることを特徴とする
有機エレクトロルミネッセンス表示装置。1. A plurality of pixel portions, in which an organic compound layer including a light emitting layer made of an organic light emitting material is interposed between a pair of electrodes, are arranged in a matrix on a transparent substrate, and at least one of the pair of electrodes is formed. In the organic electroluminescence display device in which the electrode on the transparent substrate side is transparent, a transparent portion is selectively provided at a position opposite to the pixel portion on a surface opposite to the surface on which the pixel portion of the transparent substrate is formed. An organic electroluminescent display device, characterized in that the light-shielding film thereof is adhered.
大きさと同じであることを特徴とする請求項１に記載の
有機エレクトロルミネッセンス表示装置。2. The organic electroluminescence display device according to claim 1, wherein the size of the transparent portion is the same as the size of the pixel portion.
るフィルムであることを特徴とする請求項２に記載の有
機エレクトロルミネッセンス表示装置。3. The organic electroluminescence display device according to claim 2, wherein the film is a film that absorbs light having a visible light wavelength.
したポリイミドフィルムであることを特徴とする請求項
１から３のうちのいずれか１項に記載の有機エレクトロ
ルミネッセンス表示装置。4. The organic electroluminescence display device according to claim 1, wherein the film is a polyimide film containing carbon black.
を特徴とする請求項１から３のうちのいずれか１項に記
載の有機エレクトロルミネッセンス表示装置。5. The organic electroluminescence display device according to claim 1, wherein the film is a neutral filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002001005A JP2003203760A (en) | 2002-01-08 | 2002-01-08 | Organic electroluminescence display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002001005A JP2003203760A (en) | 2002-01-08 | 2002-01-08 | Organic electroluminescence display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003203760A true JP2003203760A (en) | 2003-07-18 |
Family
ID=27641234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002001005A Withdrawn JP2003203760A (en) | 2002-01-08 | 2002-01-08 | Organic electroluminescence display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003203760A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005209651A (en) * | 2004-01-20 | 2005-08-04 | Lg Electronics Inc | Organic electro-luminescent element and its manufacturing method |
| JP2007227275A (en) * | 2006-02-27 | 2007-09-06 | Hitachi Displays Ltd | Organic light-emitting display device |
| US9206960B2 (en) | 2012-07-25 | 2015-12-08 | Samsung Display Co., Ltd. | Organic light-emitting display device and method of manufacturing the same |
| US10229961B2 (en) | 2016-07-14 | 2019-03-12 | Samsung Display Co., Ltd. | Display device and manufacturing method thereof |
| JP2019106332A (en) * | 2017-12-14 | 2019-06-27 | コニカミノルタ株式会社 | Organic electroluminescent device and method for manufacturing the same, and display device |
-
2002
- 2002-01-08 JP JP2002001005A patent/JP2003203760A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005209651A (en) * | 2004-01-20 | 2005-08-04 | Lg Electronics Inc | Organic electro-luminescent element and its manufacturing method |
| JP2007227275A (en) * | 2006-02-27 | 2007-09-06 | Hitachi Displays Ltd | Organic light-emitting display device |
| US9206960B2 (en) | 2012-07-25 | 2015-12-08 | Samsung Display Co., Ltd. | Organic light-emitting display device and method of manufacturing the same |
| US10229961B2 (en) | 2016-07-14 | 2019-03-12 | Samsung Display Co., Ltd. | Display device and manufacturing method thereof |
| JP2019106332A (en) * | 2017-12-14 | 2019-06-27 | コニカミノルタ株式会社 | Organic electroluminescent device and method for manufacturing the same, and display device |
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