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JPH1074583A - Organic EL display and method of manufacturing organic EL display - Google Patents

Organic EL display and method of manufacturing organic EL display

Info

Publication number
JPH1074583A
JPH1074583A JP8230822A JP23082296A JPH1074583A JP H1074583 A JPH1074583 A JP H1074583A JP 8230822 A JP8230822 A JP 8230822A JP 23082296 A JP23082296 A JP 23082296A JP H1074583 A JPH1074583 A JP H1074583A
Authority
JP
Japan
Prior art keywords
transparent substrate
organic
display
sealing material
cathode
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.)
Pending
Application number
JP8230822A
Other languages
Japanese (ja)
Inventor
Shuichi Yoshibe
修一 吉部
Hideaki Shirokura
英明 白倉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP8230822A priority Critical patent/JPH1074583A/en
Publication of JPH1074583A publication Critical patent/JPH1074583A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/8722—Peripheral sealing arrangements, e.g. adhesives, sealants

Landscapes

  • Electroluminescent Light Sources (AREA)

Abstract

(57)【要約】 【課題】 有機ＥＬディスプレイ（Electroluminescent
Display）の改善に関する。 【解決手段】 第１の透明基板１１と、第１の透明基板
１１上に形成された陰極１２と、陰極１２上に形成され
た有機材料からなる発光体１４と、発光体１４上に形成
された陽極１５と、第１の透明基板１１に対向配置され
た第２の透明基板１２と、少なくとも発光体１４を封止
するように第１の透明基板１１と第２の透明基板１２と
を接着するシール材１６を有し、かつシール材１６は、
フリットガラスからなること。 (57) [Abstract] [Problem] An organic EL display (Electroluminescent display)
Display). SOLUTION: A first transparent substrate 11, a cathode 12 formed on the first transparent substrate 11, a luminous body 14 formed of an organic material formed on the cathode 12, and a luminous body formed on the luminous body 14. The first transparent substrate 11 and the second transparent substrate 12 are bonded to each other so as to seal at least the luminous body 14. And the sealing material 16 is
Be composed of frit glass.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は有機ＥＬディスプレ
イ（Electroluminescent Display）及び有機ＥＬディス
プレイの製造方法に関し、更に詳しく言えば、有機ＥＬ
ディスプレイの有機発光体を湿気などから保護する構造
や、それを製造する方法の改善に関する。近年、フラッ
トディスプレイパネルとして液晶ディスプレイなどに代
えて有機ＥＬを用いたディスプレイが注目されている。[0001] 1. Field of the Invention [0002] The present invention relates to an organic EL display (Electroluminescent Display) and a method of manufacturing the organic EL display, and more particularly, to an organic EL display.
The present invention relates to a structure for protecting an organic luminous body of a display from moisture and the like, and an improvement in a method for manufacturing the same. In recent years, a display using an organic EL as a flat display panel instead of a liquid crystal display or the like has attracted attention.

【０００２】有機ＥＬディスプレイは、直流電圧で駆動
できるので駆動回路が簡単にでき、液晶表示装置のよう
に視野角依存性がなく、また自己発光のため明るい。更
に、応答速度が液晶表示装置よりも相当速いなど多々の
メリットがあるので、今後のフラットディスプレイパネ
ルとして期待されている。[0002] An organic EL display can be driven by a DC voltage, so that its driving circuit can be simplified, it has no viewing angle dependence unlike a liquid crystal display device, and it is bright because of self-emission. Further, since there are many advantages such as a response speed which is considerably faster than that of the liquid crystal display device, it is expected as a flat display panel in the future.

【０００３】[0003]

【従来の技術】以下で、従来例に係る有機ＥＬディスプ
レイについて図面を参照しながら説明する。なお、図５
は本実施形態に係る有機ＥＬディスプレイの構造を説明
する平面図であって、図４は図５のＡ−Ａ線断面図であ
る。これは、図４，図５に示すように、ガラスからなる
第１，第２の透明基板（１，２），MgInなどからなる陰
極（３），有機ＥＬなどからなる白色発光体（４），Ｉ
ＴＯ膜などからなる陽極（５）及び低温硬化のエポキシ
樹脂若しくはＵＶ硬化性の樹脂などからなるシール材
（６）から構成されている。なお、図５では白色発光体
（４）の図示を省略している。2. Description of the Related Art A conventional organic EL display will be described below with reference to the drawings. FIG.
FIG. 4 is a plan view illustrating the structure of the organic EL display according to the present embodiment, and FIG. 4 is a cross-sectional view taken along line AA of FIG. This is, as shown in FIGS. 4 and 5, first and second transparent substrates (1, 2) made of glass, a cathode (3) made of MgIn or the like, and a white light emitter (4) made of an organic EL or the like. , I
An anode (5) made of a TO film or the like and a sealing material (6) made of a low-temperature-curable epoxy resin or a UV-curable resin. In FIG. 5, the illustration of the white light emitter (4) is omitted.

【０００４】第１の透明基板（１）上には、陰極（３）
がストライプ状に配置され、表示領域の陰極（３）の上
には白色発光体（４）が形成されている。また、白色発
光体（４）上には、陰極（３），白色発光体（４）と直
交するように配置された陽極（５）が形成されており、
これらはマトリクス状に配置されている。この第１の透
明基板（１）上に、第２の透明基板（２）が対向配置さ
れ、両者はシール材（６）で接着されている。A cathode (3) is provided on a first transparent substrate (1).
Are arranged in a stripe pattern, and a white light-emitting body (4) is formed on the cathode (3) in the display area. A cathode (3) and an anode (5) arranged orthogonal to the white light-emitting body (4) are formed on the white light-emitting body (4).
These are arranged in a matrix. On this first transparent substrate (1), a second transparent substrate (2) is arranged to oppose, and both are adhered by a sealing material (6).

【０００５】このディスプレイで画像表示させるには、
発光させるべき領域の陽極（５）と陰極（３）との間に
直流電圧を印加する。すると電子が直流電圧が印加され
電界を生じた箇所の白色発光体（４）に注入されること
でこれが発光し、表示面である第２の透明基板（２）側
に単色の画像表示をすることができる。To display an image on this display,
A DC voltage is applied between the anode (5) and the cathode (3) in the region to emit light. Then, the electrons are injected into the white light-emitting body (4) where a DC voltage is applied to generate an electric field, and this emits light, and a monochrome image is displayed on the second transparent substrate (2) side which is a display surface. be able to.

【０００６】[0006]

【発明が解決しようとする課題】上記装置において、有
機ＥＬからなる白色発光体（４）は湿気に弱いので、湿
気から遮断する必要がある。そこで第１，第２の透明基
板（１，２）の間に白色発光体（４）を封止して、湿気
から遮断している。ガラスからなる第１，第２の透明基
板（１，２）は、湿気を通さないが、側面のシール材
（６）は樹脂からなるので、どうしても湿気が侵入する
恐れがあった。このため、シール材（６）から装置の内
部に入って来る湿気によって、有機ＥＬからなる白色発
光体が劣化してしまうという問題が生じていた。In the above device, the white light-emitting body (4) made of organic EL is vulnerable to moisture and must be shielded from moisture. Therefore, a white light-emitting body (4) is sealed between the first and second transparent substrates (1, 2) so as to be shielded from moisture. The first and second transparent substrates (1, 2) made of glass do not allow moisture to pass, but since the sealing material (6) on the side surface is made of resin, there is a risk that moisture will inevitably enter. For this reason, there has been a problem that moisture entering the inside of the device from the sealing material (6) deteriorates the white light emitting body made of the organic EL.

【０００７】[0007]

【課題を解決するための手段】本発明は上記従来の欠点
に鑑み成されたもので、第１の透明基板と、前記第１の
透明基板上に形成された陰極と、前記陰極上に形成され
た有機ＥＬからなる発光体と、前記発光体上に形成され
た陽極と、前記第１の透明基板に対向配置された第２の
透明基板と、少なくとも前記発光体を封止するように前
記第１の透明基板と前記第２の透明基板とを接着するシ
ール材を有し、かつ前記シール材は、フリットガラス
（低融点ガラス）からなることを特徴とする有機ＥＬデ
ィスプレイや、第１の透明基板上に陰極を形成する工程
と、前記陰極上に有機ＥＬからなる発光体を形成する工
程と、前記発光体上に陽極を形成する工程と、前記第１
の透明基板上に、少なくとも前記発光体を取り囲むよう
にフリットガラスからなるシール材を形成する工程と、
前記シール材が形成された前記第１の透明基板上に、第
２の透明基板を対向配置して載置する工程と、レーザビ
ームを用いて選択的に前記シール材を加熱して溶融し、
前記第１の透明基板と前記第２の透明基板とを接着する
工程とを有することを特徴とする有機ＥＬディスプレイ
の製造方法により、上記課題を解決するものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and has a first transparent substrate, a cathode formed on the first transparent substrate, and a cathode formed on the first transparent substrate. A luminous body made of an organic EL, an anode formed on the luminous body, a second transparent substrate disposed opposite to the first transparent substrate, and at least sealing the luminous body. An organic EL display having a sealing material for bonding a first transparent substrate and the second transparent substrate, wherein the sealing material is made of frit glass (low-melting glass); Forming a cathode on a transparent substrate, forming a luminous body made of organic EL on the cathode, forming an anode on the luminous body,
Forming a sealing material made of frit glass on at least the transparent substrate so as to surround the luminous body;
On the first transparent substrate on which the sealing material is formed, a step of placing a second transparent substrate so as to face the same, and selectively heating and melting the sealing material using a laser beam,
The object is solved by a method for manufacturing an organic EL display, comprising a step of bonding the first transparent substrate and the second transparent substrate.

【０００８】[0008]

【発明の実施の形態】以下で、本発明の実施形態に係る
有機ＥＬディスプレイについて図面を参照しながら説明
する。なお、図２は本実施形態に係る有機ＥＬディスプ
レイの構造を説明する上面図であって、図１は図２のＸ
−Ｘ線断面図である。このディスプレイは、図１，図２
に示すように、ガラスからなる第１，第２の透明基板
（１１，１２），MgInなどからなる陰極（１３），有機
ＥＬなどからなる白色発光体（１４），ＩＴＯ膜などか
らなる陽極（１５）及び低融点のフリットガラスからな
るシール材（１６）から構成されている。なお、図２で
は白色発光体（１４）の図示を省略している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an organic EL display according to an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a top view illustrating the structure of the organic EL display according to the present embodiment, and FIG.
-It is an X-ray sectional view. This display is shown in Figs.
As shown in FIG. 1, first and second transparent substrates (11, 12) made of glass, a cathode (13) made of MgIn or the like, a white light emitter (14) made of an organic EL or the like, and an anode made of an ITO film or the like ( 15) and a sealing material (16) made of frit glass having a low melting point. In FIG. 2, the illustration of the white light emitter (14) is omitted.

【０００９】第１の透明基板（１１）上には、陰極（１
３）がストライプ状に配置され、表示領域の陰極（３）
の上には白色発光体（１４）が形成されている。また、
白色発光体（１４）上には、陰極（１３），白色発光体
（１４）と直交するように配置された陽極（１５）が形
成されており、これらはマトリクス状に配置されてい
る。The cathode (1) is provided on the first transparent substrate (11).
3) are arranged in stripes, and the cathode (3) in the display area
A white light-emitting body (14) is formed on the substrate. Also,
On the white light-emitting body (14), a cathode (13) and an anode (15) arranged orthogonal to the white light-emitting body (14) are formed, and these are arranged in a matrix.

【００１０】この第１の透明基板（１１）上に、第２の
透明基板（１２）が対向配置され、両者はシール材（１
６）で接着されている。このシール材（１６）は、上述
のようにフリットガラスからなるので、ここで湿気が透
過することは殆どない。従って、シール材として湿気が
透過しやすい低融点のエポキシ樹脂若しくはＵＶ硬化性
の樹脂などを用いていた従来装置に比して、湿気による
発光体の劣化が少ないので、ディスプレイの耐久性が向
上し、寿命の短縮を抑止できる。On the first transparent substrate (11), a second transparent substrate (12) is disposed so as to face the first transparent substrate (11).
6) is adhered. Since the sealing material (16) is made of frit glass as described above, there is almost no permeation of moisture here. Therefore, compared to the conventional device using a low melting point epoxy resin or a UV curable resin that easily transmits moisture as a sealing material, the deterioration of the luminous body due to moisture is small, and the durability of the display is improved. In addition, shortening of the life can be suppressed.

【００１１】このディスプレイで画像表示させるには、
発光させるべき領域の陽極（１５）と陰極（１３）との
間に直流電圧を印加する。すると電子が直流電圧が印加
され電界を生じた箇所の白色発光体（１４）に注入され
ることでこれが発光し、表示面である第２の透明基板
（１２）側に単色の画像表示をすることができる。以下
で上記装置の製造方法について図３を参照しながら簡単
に説明する。To display an image on this display,
A DC voltage is applied between the anode (15) and the cathode (13) in the region to emit light. Then, the electrons are injected into the white light-emitting body (14) where a DC voltage is applied to generate an electric field, and this emits light, and a monochrome image is displayed on the second transparent substrate (12) side, which is a display surface. be able to. Hereinafter, a method of manufacturing the above device will be briefly described with reference to FIG.

【００１２】有機ＥＬは有機物質であるため高温には弱
く、材料にもよるが一般的に１２０〜１３０℃程度の温
度にしか耐えられない。フリットガラスをシール材とし
て用いるにはフリットガラスを溶融して第１，第２の透
明基板を接着する必要があるが、フリットガラスの融点
は低融点とはいえ４００℃程度なので、これを接着する
際に装置全体を加熱装置に入れ、４００℃に加熱する
と、有機ＥＬが熱により破損してしまう。Since organic EL is an organic substance, it is vulnerable to high temperatures, and generally can only withstand a temperature of about 120 to 130 ° C., depending on the material. In order to use frit glass as a sealing material, it is necessary to melt the frit glass and bond the first and second transparent substrates, but the frit glass has a low melting point of about 400 ° C. At this time, if the entire device is put into a heating device and heated to 400 ° C., the organic EL will be damaged by heat.

【００１３】そこで、本発明では図３に示すように、陰
極（１３），白色発光体（１４），陽極（１５）などの
所定の部材を第１の透明基板（１１）上に形成し、フリ
ットガラスのシール材（１６）を接着箇所に形成し、第
２の透明基板（１２）を位置合せしてその上に載置した
後に、レーザビーム（１７）をシール材（１６）上に照
射し、シール材（１６）だけを選択的に４００℃程度ま
で加熱して溶融させている。Accordingly, in the present invention, as shown in FIG. 3, predetermined members such as a cathode (13), a white luminous body (14), and an anode (15) are formed on a first transparent substrate (11). A sealing material (16) of frit glass is formed at the bonding location, the second transparent substrate (12) is positioned and mounted thereon, and then a laser beam (17) is irradiated on the sealing material (16). Then, only the sealing material (16) is selectively heated to about 400 ° C. and melted.

【００１４】この方法によれば、シール材（１６）だけ
を加熱しているので、シール材（１６）が４００℃程度
の温度まで上昇して溶融しても、高温に弱い有機ＥＬか
らなる白色発光体（１４）の温度はほとんど上昇しない
ので、熱による破損が生じることを抑止できる。なお、
本実施形態では、白色発光体（１４）を単層として説明
しているが、この発光体上に効率良くキャリアを注入す
る目的で電子輸送層や正孔輸送層などを形成した構造を
とってもよい。According to this method, since only the sealing material (16) is heated, even if the sealing material (16) rises to a temperature of about 400 ° C. and melts, the white color of the organic EL which is weak to high temperatures is obtained. Since the temperature of the luminous body (14) hardly rises, it is possible to suppress the occurrence of damage due to heat. In addition,
In the present embodiment, the white light-emitting body (14) is described as a single layer, but a structure in which an electron transport layer, a hole transport layer, or the like is formed on the light-emitting body for the purpose of efficiently injecting carriers may be adopted. .

【００１５】[0015]

【発明の効果】以上説明したように本発明に係る有機Ｅ
Ｌディスプレイによれば、第１，第２の透明基板を接着
して有機材料からなる発光体を封止するシール材とし
て、フリットガラスを用いているので、従来のようにシ
ール材から湿気が装置内に入り、発光体が劣化してディ
スプレイの耐久性が低下してしまうことを極力抑止する
ことが可能になる。As described above, the organic E according to the present invention is used.
According to the L display, since frit glass is used as a sealing material for sealing the luminous body made of an organic material by bonding the first and second transparent substrates, moisture is removed from the sealing material as in the related art. It is possible to suppress as much as possible the deterioration of the durability of the display due to the deterioration of the luminous body.

【００１６】また、本発明に係る有機ＥＬディスプレイ
の製造方法によれば、選択的にレーザビームをフリット
ガラスからなるシール材に照射してこれを溶融して接着
しているので、高温に弱い発光体がフリットガラス溶融
の際の加熱により破損することを極力抑止することが可
能になる。Further, according to the method of manufacturing an organic EL display according to the present invention, since a sealing material made of frit glass is selectively irradiated with a laser beam and melted and bonded, light emission weak at high temperatures is achieved. It is possible to prevent the body from being damaged by heating when frit glass is melted as much as possible.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の実施形態に係る有機ＥＬディスプレイ
を説明する断面図である。FIG. 1 is a cross-sectional view illustrating an organic EL display according to an embodiment of the present invention.

【図２】本発明の実施形態に係る有機ＥＬディスプレイ
を説明する上面図である。FIG. 2 is a top view illustrating the organic EL display according to the embodiment of the present invention.

【図３】本発明の実施形態に係る有機ＥＬディスプレイ
の製造方法を説明する図である。FIG. 3 is a diagram illustrating a method for manufacturing an organic EL display according to an embodiment of the present invention.

【図４】従来例に係る有機ＥＬディスプレイの構造を説
明する断面図である。FIG. 4 is a cross-sectional view illustrating a structure of an organic EL display according to a conventional example.

【図５】従来例に係る有機ＥＬディスプレイを説明する
上面図である。FIG. 5 is a top view illustrating an organic EL display according to a conventional example.

【符号の説明】[Explanation of symbols]

（１１） 第１の透明基板 （１２） 第２の透明基板 （１３） 陰極 （１４） 白色発光体（発光体） （１５） 陽極 （１６） シール材 （１７） レーザビーム (11) First transparent substrate (12) Second transparent substrate (13) Cathode (14) White light emitter (light emitter) (15) Anode (16) Seal material (17) Laser beam

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 第１の透明基板と、 前記第１の透明基板上に形成された陰極と、 前記陰極上に形成された有機材料からなる発光体と、 前記発光体上に形成された陽極と、 前記第１の透明基板に対向配置された第２の透明基板
と、 少なくとも前記発光体を封止するように前記第１の透明
基板と前記第２の透明基板とを接着するシール材を有
し、 かつ前記シール材は、フリットガラスからなることを特
徴とする有機ＥＬディスプレイ。A first transparent substrate; a cathode formed on the first transparent substrate; a light emitter made of an organic material formed on the cathode; and an anode formed on the light emitter. A second transparent substrate opposed to the first transparent substrate, and a sealing material for bonding the first transparent substrate and the second transparent substrate so as to seal at least the luminous body. An organic EL display, comprising: a sealing material made of frit glass. 【請求項２】 第１の透明基板上に陰極を形成する工程
と、 前記陰極上に有機材料からなる発光体を形成する工程
と、 前記発光体上に陽極を形成する工程と、 前記第１の透明基板上に、少なくとも前記発光体を取り
囲むようにフリットガラスからなるシール材を形成する
工程と、前記シール材が形成された前記第１の透明基板
上に、第２の透明基板を対向配置して載置する工程と、 レーザビームを用いて選択的に前記シール材を加熱して
溶融し、前記第１の透明基板と前記第２の透明基板とを
接着する工程とを有することを特徴とする有機ＥＬディ
スプレイの製造方法。2. a step of forming a cathode on a first transparent substrate; a step of forming a light emitter made of an organic material on the cathode; a step of forming an anode on the light emitter; Forming a sealing material made of frit glass so as to surround at least the luminous body on the transparent substrate, and disposing a second transparent substrate to face the first transparent substrate on which the sealing material is formed. And mounting the sealing material selectively by using a laser beam to melt the sealing material, and bonding the first transparent substrate and the second transparent substrate. A method for manufacturing an organic EL display.
JP8230822A 1996-08-30 1996-08-30 Organic EL display and method of manufacturing organic EL display Pending JPH1074583A (en)

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Application Number Priority Date Filing Date Title
JP8230822A JPH1074583A (en) 1996-08-30 1996-08-30 Organic EL display and method of manufacturing organic EL display

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JPH1074583A true JPH1074583A (en) 1998-03-17

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KR20200143442A (en) 2018-04-16 2020-12-23 덴카 주식회사 Encapsulant for organic electroluminescent display devices
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KR20210148073A (en) 2019-03-27 2021-12-07 덴카 주식회사 composition
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