JP3711682B2 - Organic EL display - Google Patents
Organic EL display Download PDFInfo
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- JP3711682B2 JP3711682B2 JP05343597A JP5343597A JP3711682B2 JP 3711682 B2 JP3711682 B2 JP 3711682B2 JP 05343597 A JP05343597 A JP 05343597A JP 5343597 A JP5343597 A JP 5343597A JP 3711682 B2 JP3711682 B2 JP 3711682B2
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- 239000000463 material Substances 0.000 claims description 27
- 239000011810 insulating material Substances 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000007772 electrode material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 12
- 239000000758 substrate Substances 0.000 description 12
- 239000010408 film Substances 0.000 description 6
- -1 4-tert-butylphenyl Chemical group 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000004528 spin coating Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005525 hole transport Effects 0.000 description 2
- 238000007641 inkjet printing Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000001459 lithography Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 1
- 125000000319 biphenyl-4-yl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/19—Segment displays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8051—Anodes
- H10K59/80515—Anodes characterised by their shape
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は発光ディスプレイに係わり、更に詳しくは、有機発光材料を用いた発光ディスプレイに関する。
【０００２】
【従来の技術】
近年液晶表示体がワードプロセッサー、パーソナルコンピュータ等の表示部として盛んに用いられている。この液晶表示体は非発光素子であり明るさの点、特に反射型ディスプレイで用いる時問題となっている。ここへきて薄型、軽量の特徴を有す有機の発光材料（以後有機ＥＬ材料という）を用いた発光ディスプレイが注目されている。
【０００３】
この発光ディスプレイの断面図を図１に示す。図において１はアルミニウム電極を、２は有機ＥＬ材料を、３はＩＴＯ透明電極を、４はガラス基板を、５は電源をそれぞれ示す。この発光ディスプレイの作成方法は以下の通りである。まず、透明基板上にスパッター法、蒸着法等によりＩＴＯ等の透明電極の薄膜を付ける。この後、ホトリソグラフィー法等により所望の形状の電極とする。しかる後、スピンコート法、蒸着法等により有機ＥＬ材料をコートし発光層を形成する。更に仕事関数の低い金属、例えば、マグネシウム、アルミニウム、リチウム等、あるいはこれら金属の合金を蒸着、スパッタ法等によりとばすことにより対向電極を得ることが出来る。以上が基本の工程であるが、発光効率を上げるために、更に透明電極を付けた後に、ホール輸送材料、例えばＮ，Ｎ’−ジフェニル−Ｎ，Ｎ’−（２，４−ジメチルフェニル）−１，１’−ビフェニル−４，４’−ジアミンを蒸着法等により付けても良い。また有機ＥＬ材料を付けた後、電子輸送材料を、例えば２−（４−ビフェニル）−５−（４−ｔｅｒｔ−ブチルフェニル）−１，３，４−オキシジアゾールを付けても良い。
【０００４】
この対向する２種の電極に電界を印加する事により発光させることが出来る。この発光ディスプレイの特徴として、１０ボルト以下の低電圧で駆動できる事がある。この有機ＥＬ材料を用いた発光ディスプレイは将来有望な技術であるが、しかし、寿命が短い欠点があった。発光ディスプレイの寿命としては色々考えることができる。例えば有機ＥＬ材の劣化により、電流値の増加も考えることが出来る。しかし電流値の増加は外観的には問題ないのでここで考える寿命として発光部の部分的劣化や発光部の不均一性がでた時をその発光ディスプレイの寿命とした。このように寿命を定義したとき、有機ＥＬ材料を用いた従来の発光ディスプレイの、最初に、発光部の周辺が劣化、黒化するか、あるいは周辺と中央部に発光強度の不均一が見られる時間は、電流値が増え始める時間より長くなるが、それでも液晶表示体の寿命に比べたらかなり短いものになる。
【０００５】
【発明が解決しようとする課題】
本発明はこのような有機ＥＬ材料を用いた発光ディスプレイの寿命が短いという問題を解決するためになされたもので、その目的は従来の作成方法をあまり変えることなく、有機ＥＬを用いた寿命の長い発光ディスプレイを提供するためになされたものである。
【０００６】
【課題を解決するための手段】
上記課題を解決するために、本発明の有機ＥＬディスプレイは、発光材料と該発光材料を挟む電極材料とを有し、一方の電極が複数の独立する電極より成り、前記複数の独立する電極の各々がトランジスターにつながり独立に通電でき、他方の電極が共通電極となるマトリクス駆動型有機ＥＬディスプレイであって、前記独立する電極の周辺がなめらかな曲線を形成する絶縁材料で覆われていることを特徴としている。
【０００７】
上記の有機ＥＬディスプレイにおいて、独立する電極の周辺を覆っている絶縁材料が形成しているなめらかな曲線は、円、又は楕円であっても良い。
【０００８】
上記の発光ディスプレイにおいて、前記絶縁材料がレジスト材料であってもよい。
【０００９】
上記の発光ディスプレイにおいて、前記なめらかな曲線は円、又は楕円を構成していることが好ましい。
【００１０】
本発明は発光部の形状をなめらかにすることにあり、発光部の形状は以上のべた他にも考えられることは自明のことである。また有機ＥＬ材料、絶縁材料等の材料も色々考えることは出来、また電極の形状作成方法もリソグラフィー法等以外にも色々考えることが出来る。
【００１１】
【発明の実施の形態】
以上のべた様に発光部をなめらかな曲線にすることにより、電界集中が起きなくなり、局所的な劣化や輝度の不均一さが解消できる。このため発光ディスプレイの寿命を延ばすことができる。このような簡単な方法で従来の発光ディスプレイの寿命を延ばすことが出来る。以下実施例により本発明を詳細に説明する。
【００１２】
【実施例】
（実施例１）
図２、図３にセグメント駆動の電極例を示す。図２は従来の発光ディスプレイに用いた電極の例、図３は本発明の発光ディスプレイに用いられた発光ディスプレイの電極の例である。図において１１、１４はセグメント電極を、１２、１５は引出し線を、１３、１６は基板をそれぞれ示す。電極の形状はリソグラフィー法により作成した。このような電極を有すガラス基板の上にスピンコート法によりポリパラフェニレンビニレンの０．１ミクロンの膜を作成した後、アルミニウム金属を１５００オングストローム蒸着した。このようにして得た発光ディスプレイに１０Ｖの直流印加で、条件を一定にし、寿命試験を行ったところ従来の発光ディスプレイは１０００時間で発光部の周辺部が劣化したが、本発明の発光ディスプレイは変化がなかった。
【００１３】
（実施例２）
図４、図５にマトリクス駆動発光ディスプレイの電極周辺の一部を取り出して示す。図４は従来の発光ディスプレイに用いた電極周辺の例、図５は本発明の発光ディスプレイに用いられた発光ディスプレイの電極周辺の例である。図において２１、２５はＩＴＯ電極を、２２、２６は絶縁層を、２３、２７は基板を、２４、２８ＴＦＴ素子を、２９は絶縁膜をそれぞれ示す。図５に示す本発明に用いられる絶縁膜は、矩形上に形成されたＩＴＯ電極を有すＴＦＴ素子をのせた基板上に、ホトレジスト材料を全面に塗布した後、フトリソグラフィー法によりＩＴＯ電極上のレジスト材料を円形に除去することにより得られる。このようなレジスト材料により周辺を覆われたＩＴＯ電極上にポリパラフェニレンビニレンが０．１ミクロンの膜を形成するようにポリパラフェニレンビニレンの前駆体溶液をインクジェットプリンティング装置により充填し、焼成した。尚、従来の発光ディスプレイの電極上にはスピンコート法によりポリパラフェニレンビニレンの膜を形成し、焼成した。二方法により有機ＥＬ層を形成、焼成後、アルミニウム金属を１５００オングストローム蒸着し、対向基板とした。このようにして得た発光ディスプレイを、条件を一定にし、寿命試験を行ったところ、従来の発光ディスプレイは１１５０時間で、発光部の周辺部が劣化したが、本発明の発光ディスプレイは劣化しなかった。
【００１４】
以上述べたように発光部の形状をなめらかにすることにより、発光ディスプレイの寿命を延ばすことが出来る事がわかった。
【００１５】
本発明の方法は、本発明の要旨を逸脱しない限り、上記以外の、その他のなめらかにする方法、絶縁材料，有機ＥＬ材料等に適用できるものである。
【００１６】
例えば、実施例では高分子系の有機ＥＬ材料を用いたが低分子系の有機ＥＬ材料についても適用できるものである。またインクジェットプリンティング装置により赤、緑、青の三色の有機ＥＬ材料を飛ばすことによりフルカラーの発光ディスプレイを作成できることは自明のことである。また発光効率を上げるためにホール輸送層や電子輸送層を形成出来ることも自明のことである。
【００１７】
【発明の効果】
以上実施例で説明したように従来の方法をあまり変更することなく、単に発光ディスプレイの発光部の形状をなめらかにするだけで、発光ディスプレイの寿命を延ばすことが出来る。
【図面の簡単な説明】
【図１】発光ディスプレイの断面図。
【図２】従来のセグメント駆動用発光ディスプレイの電極の正面図。
【図３】本発明のセグメント駆動用ディスプレイの電極の正面図。
【図４】従来のマトリクス駆動用発光ディスプレイの電極周辺の断面図。
【図５】本発明のマトリクス駆動用発光ディスプレイの電極周辺の断面図。
【符号の説明】
１・・・・アルミニウム電極
２・・・・有機ＥＬ層
３・・・・ＩＴＯ電極
４・・・・ガラス基板
５・・・・電源
１１・・・セグメント電極
１２・・・引出し線
１３・・・基板
１４・・・セグメント電極
１５・・・引出し線
１６・・・基板
２１・・・ＩＴＯ電極
２２・・・絶縁層
２３・・・基板
２４・・・ＴＦＴ素子
２５・・・ＩＴＯ電極
２６・・・絶縁層
２７・・・基板
２８・・・ＴＦＴ素子
２９・・・絶縁膜[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light emitting display, and more particularly to a light emitting display using an organic light emitting material.
[0002]
[Prior art]
In recent years, liquid crystal displays have been actively used as display units for word processors, personal computers, and the like. This liquid crystal display is a non-light emitting element, which is problematic in terms of brightness, particularly when used in a reflective display. A light-emitting display using an organic light-emitting material (hereinafter referred to as an organic EL material) having thin and light features has been attracting attention.
[0003]
A cross-sectional view of the light emitting display is shown in FIG. In the figure, 1 is an aluminum electrode, 2 is an organic EL material, 3 is an ITO transparent electrode, 4 is a glass substrate, and 5 is a power source. The method of creating this light emitting display is as follows. First, a thin film of a transparent electrode such as ITO is attached on a transparent substrate by sputtering, vapor deposition or the like. Thereafter, an electrode having a desired shape is formed by a photolithography method or the like. Thereafter, an organic EL material is coated by a spin coating method, a vapor deposition method, or the like to form a light emitting layer. Furthermore, a counter electrode can be obtained by skipping a metal having a low work function, such as magnesium, aluminum, lithium, or an alloy of these metals by vapor deposition or sputtering. The above is the basic process. In order to increase the luminous efficiency, a hole transport material such as N, N'-diphenyl-N, N '-(2,4-dimethylphenyl)-is added after further attaching a transparent electrode. 1,1′-biphenyl-4,4′-diamine may be attached by vapor deposition or the like. Further, after attaching the organic EL material, for example, 2- (4-biphenyl) -5- (4-tert-butylphenyl) -1,3,4-oxydiazole may be attached as the electron transport material.
[0004]
Light can be emitted by applying an electric field to the two types of electrodes facing each other. A feature of this light emitting display is that it can be driven at a low voltage of 10 volts or less. A light-emitting display using this organic EL material is a promising technology in the future, but has a short life. Various things can be considered as the lifetime of the light emitting display. For example, an increase in current value can be considered due to deterioration of the organic EL material. However, the increase in the current value has no problem in appearance, so that the lifetime considered here is the lifetime of the light emitting display when the light emitting portion partially deteriorates or the light emitting portion becomes non-uniform. When the lifetime is defined in this way, in the conventional light emitting display using an organic EL material, first, the periphery of the light emitting portion is deteriorated and blackened, or the light emission intensity is uneven in the periphery and the central portion. Although the time is longer than the time when the current value starts to increase, it is still much shorter than the life of the liquid crystal display.
[0005]
[Problems to be solved by the invention]
The present invention was made in order to solve the problem that the lifetime of a light emitting display using such an organic EL material is short, and its purpose is to improve the lifetime of the organic EL without changing the conventional production method so much. It was made to provide a long light emitting display.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, an organic EL display of the present invention has a light emitting material and an electrode material sandwiching the light emitting material, and one electrode is composed of a plurality of independent electrodes, and the plurality of independent electrodes Each matrix is connected to a transistor and can be energized independently, and the other electrode is a common electrode, which is a matrix drive type organic EL display, and the periphery of the independent electrode is covered with an insulating material that forms a smooth curve. It is a feature.
[0007]
In the above organic EL display, the smooth curve formed by the insulating material covering the periphery of the independent electrode may be a circle or an ellipse.
[0008]
In the above light emitting display, the insulating material may be a resist material.
[0009]
In the above light emitting display, the smooth curve preferably forms a circle or an ellipse.
[0010]
The present invention is to smooth the shape of the light emitting portion, and it is obvious that the shape of the light emitting portion can be considered in addition to the above. Various materials such as organic EL materials and insulating materials can be considered, and various electrode shape creation methods can be considered other than the lithography method.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
As described above, by making the light emitting portion a smooth curve, electric field concentration does not occur, and local deterioration and uneven brightness can be eliminated. For this reason, the lifetime of the light emitting display can be extended. Such a simple method can extend the lifetime of the conventional light emitting display. Hereinafter, the present invention will be described in detail by way of examples.
[0012]
【Example】
(Example 1)
2 and 3 show examples of segment drive electrodes. FIG. 2 shows an example of an electrode used in a conventional light emitting display, and FIG. 3 shows an example of an electrode of the light emitting display used in the light emitting display of the present invention. In the figure, reference numerals 11 and 14 denote segment electrodes, reference numerals 12 and 15 denote leader lines, and reference numerals 13 and 16 denote substrates. The shape of the electrode was prepared by a lithography method. A 0.1 micron film of polyparaphenylene vinylene was formed on a glass substrate having such an electrode by spin coating, and then aluminum metal was deposited by 1500 angstroms. The light emitting display thus obtained was applied with a direct current of 10 V, the conditions were kept constant, and a life test was conducted. As a result, the conventional light emitting display deteriorated the peripheral part of the light emitting part in 1000 hours. There was no change.
[0013]
(Example 2)
4 and 5 show a part of the periphery of the electrodes of the matrix drive light emitting display. FIG. 4 shows an example around the electrodes used in the conventional light emitting display, and FIG. 5 shows an example around the electrodes of the light emitting display used in the light emitting display of the present invention. In the figure, 21 and 25 are ITO electrodes, 22 and 26 are insulating layers, 23 and 27 are substrates, 24 and 28 TFT elements, and 29 is an insulating film. The insulating film used in the present invention shown in FIG. 5 is formed by applying a photoresist material on the entire surface of a substrate on which a TFT element having an ITO electrode formed on a rectangle is placed, and then applying the photoresist material on the ITO electrode by photolithography. It is obtained by removing the resist material in a circle. A polyparaphenylene vinylene precursor solution was filled with an ink jet printing apparatus so as to form a 0.1 micron film of polyparaphenylene vinylene on an ITO electrode covered with such a resist material, and baked. A polyparaphenylene vinylene film was formed on the electrodes of a conventional light-emitting display by spin coating and baked. An organic EL layer was formed and fired by two methods, and then an aluminum metal was vapor-deposited at 1500 angstrom to obtain a counter substrate. A life test was conducted on the light-emitting display thus obtained under constant conditions, and the conventional light-emitting display deteriorated in the periphery of the light-emitting part in 1150 hours, but the light-emitting display of the present invention did not deteriorate. It was.
[0014]
As described above, it has been found that the life of the light emitting display can be extended by smoothing the shape of the light emitting portion.
[0015]
The method of the present invention can be applied to other smoothing methods, insulating materials, organic EL materials and the like other than those described above without departing from the gist of the present invention.
[0016]
For example, although high molecular organic EL materials are used in the embodiments, the present invention can also be applied to low molecular organic EL materials. Further, it is obvious that a full-color light emitting display can be created by flying organic EL materials of three colors of red, green, and blue with an ink jet printing apparatus. It is also obvious that a hole transport layer or an electron transport layer can be formed in order to increase the luminous efficiency.
[0017]
【The invention's effect】
As described in the above embodiments, the life of the light emitting display can be extended by simply smoothing the shape of the light emitting portion of the light emitting display without changing the conventional method so much.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a light-emitting display.
FIG. 2 is a front view of electrodes of a conventional segment drive light-emitting display.
FIG. 3 is a front view of electrodes of a segment drive display according to the present invention.
FIG. 4 is a cross-sectional view of the periphery of an electrode of a conventional matrix driving light-emitting display.
FIG. 5 is a cross-sectional view of the periphery of the electrodes of the matrix driving light-emitting display of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Aluminum electrode 2 ... Organic EL layer 3 ... ITO electrode 4 ... Glass substrate 5 ... Power supply 11 ... Segment electrode 12 ... Lead wire 13 ... -Substrate 14 ... Segment electrode 15 ... Lead wire 16 ...
Claims (2)
前記独立する電極の周辺がなめらかな曲線を形成する絶縁材料で覆われていること、
を特徴とする有機ＥＬディスプレイ。A light emitting material and an electrode material sandwiching the light emitting material, wherein one electrode is composed of a plurality of independent electrodes, each of the plurality of independent electrodes is connected to a transistor and can be independently energized, and the other electrode is a common electrode In the matrix driven organic EL display
The periphery of the independent electrode is covered with an insulating material that forms a smooth curve;
Organic EL display characterized by this.
前記なめらかな曲線は円、又は楕円を構成していること、
を特徴とする有機ＥＬディスプレイ。The organic EL display according to claim 1,
The smooth curve comprises a circle or an ellipse;
Organic EL display characterized by this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05343597A JP3711682B2 (en) | 1997-03-07 | 1997-03-07 | Organic EL display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05343597A JP3711682B2 (en) | 1997-03-07 | 1997-03-07 | Organic EL display |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003025958A Division JP3800182B2 (en) | 2003-02-03 | 2003-02-03 | Organic EL display and method for manufacturing organic EL display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10255975A JPH10255975A (en) | 1998-09-25 |
| JP3711682B2 true JP3711682B2 (en) | 2005-11-02 |
Family
ID=12942777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05343597A Expired - Lifetime JP3711682B2 (en) | 1997-03-07 | 1997-03-07 | Organic EL display |
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| Country | Link |
|---|---|
| JP (1) | JP3711682B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001085162A (en) * | 1999-09-10 | 2001-03-30 | Sharp Corp | Organic light emitting element and its manufacturing method |
| DE19959084B4 (en) * | 1999-12-08 | 2005-05-12 | Schott Ag | Organic LED display and process for its manufacture |
| TWM244584U (en) * | 2000-01-17 | 2004-09-21 | Semiconductor Energy Lab | Display system and electrical appliance |
| US6739931B2 (en) | 2000-09-18 | 2004-05-25 | Semiconductor Energy Laboratory Co., Ltd. | Display device and method of fabricating the display device |
| KR100686341B1 (en) * | 2003-11-29 | 2007-02-22 | 삼성에스디아이 주식회사 | Organic Electro Luminescence Display device and Fabrication Method thereof |
| JP4617749B2 (en) * | 2004-07-16 | 2011-01-26 | 三菱電機株式会社 | Manufacturing method of display device |
| WO2011058601A1 (en) | 2009-11-11 | 2011-05-19 | パナソニック株式会社 | Organic el element and method for manufacturing same |
-
1997
- 1997-03-07 JP JP05343597A patent/JP3711682B2/en not_active Expired - Lifetime
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|---|---|
| JPH10255975A (en) | 1998-09-25 |
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