JPS58137990A - Electroluminescent light emitting element - Google Patents
Electroluminescent light emitting elementInfo
- Publication number
- JPS58137990A JPS58137990A JP57019213A JP1921382A JPS58137990A JP S58137990 A JPS58137990 A JP S58137990A JP 57019213 A JP57019213 A JP 57019213A JP 1921382 A JP1921382 A JP 1921382A JP S58137990 A JPS58137990 A JP S58137990A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- light
- phosphor
- phosphor layer
- emitting element
- 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
Links
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- Luminescent Compositions (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は一対の電極間に螢光体層又は螢光体層と誘電体
層を挾持し1両電極間に交流の電圧を印加しくII光体
を発光させるエレクトロルミネッセンス発光索子(以下
、EL発光索予と言う)に関するもので、新しい使用材
料を採用することにより高輝度で高品質なものを後供す
るものである。Detailed Description of the Invention The present invention relates to electroluminescence, in which a phosphor layer or a phosphor layer and a dielectric layer are sandwiched between a pair of electrodes, and an alternating current voltage is applied between the two electrodes to cause a II phosphor to emit light. This relates to light-emitting cables (hereinafter referred to as EL light-emitting cables), and uses new materials to provide high-brightness and high-quality products.
硫化亜鉛(Zn8)等を基体として活性剤や付活性剤と
して不純物質を注入した螢光体に電圧を印加丁れば発光
する現象はエレクトロルミネッセンス(EL)とL′C
広(知られズいる。EL発光素子は消費する電力量や発
熱量が少ないうえに非常に薄く作成できるところから近
年省エネルギー光源として注目されている。また、急速
な機器のデジタル化が進み表示素子が多様化してくる中
でEL発光素子も表示用として実用化が試みられている
。The phenomenon of emitting light when a voltage is applied to a phosphor made of zinc sulfide (Zn8) or the like and injected with impurities as an activator or activator is known as electroluminescence (EL) and L'C.
In recent years, EL light-emitting elements have attracted attention as an energy-saving light source because they consume less power and generate less heat, and can be made very thin.Also, with the rapid digitalization of devices, display elements are becoming more and more popular. With the diversification of electronic devices, attempts are being made to put EL light-emitting devices into practical use for display purposes.
次に、図面により従来のEL発光索予について説明する
。第1図はEL発光索予の要部断面図で、(13はガラ
スや有機透明フィルムから成る透明絶縁フィルム、(2
)はメツシュ状にした金やアルミニウム又はITO(I
nと8nの酸化物)等を透明絶縁フィルムに蒸着L”(
形成L 7: E L光の透過が可能な透光性電極、(
3)は例えば硫化亜鉛やセレン化亜鉛(Zn8e )に
銅やマンガン、アルミニウム、塩素、臭素等の活性剤や
付活性剤を注入した螢光体粉末を、シアノエチル化セル
ロースやフッソ樹脂等の有機質のバインダー中に分散さ
せた薄膜から成る螢光体層、(4)は酸化ナタンやチタ
ン酸バリウムの高論電準粉末を螢光体層(3)と同様な
前記有機パ1ンダーに分散させ【薄膜に形成しr:誘電
体層、(5)は例えばアルミニウムや金の緬又は板を用
いた対向電極、(6)は温度の佼入をできるだけ少なく
するための防湿用の透明な保鏝フィルムである。上述の
構成によるEL発光業子においズ造光性の電極(2)と
対向する電極(5)との間に交流の電圧を印加すると螢
光体層(3)が発光する。印加電圧は大きい程姶光輝度
は高く、さらに電源−波数が高い程輝度は高くなる。L
かLlいずれの場合も発光輝度が高い41j11度半減
寿命は短が(なる。Next, a conventional EL light emitting device will be explained with reference to the drawings. Figure 1 is a cross-sectional view of the main parts of the EL light emitting cable, (13 is a transparent insulating film made of glass or organic transparent film, (2 is
) is mesh-shaped gold, aluminum or ITO (ITO).
oxides of n and 8n) etc. are vapor-deposited on a transparent insulating film.
Formation L7: Transparent electrode capable of transmitting E L light, (
3) For example, a phosphor powder made by injecting an activator or activator such as copper, manganese, aluminum, chlorine, or bromine into zinc sulfide or zinc selenide (Zn8e) is mixed with an organic substance such as cyanoethylated cellulose or fluorine resin. The phosphor layer (4) consists of a thin film dispersed in a binder, and the phosphor layer (4) is made by dispersing high-voltage powders of sodium oxide or barium titanate in the same organic powder as the phosphor layer (3). Formed into a thin film r: dielectric layer; (5) is a counter electrode made of, for example, an aluminum or gold wire or plate; (6) is a transparent moisture-proof protective film to minimize temperature differences. It is. When an alternating current voltage is applied between the EL light-emitting element having the above-described odor-producing electrode (2) and the opposing electrode (5), the phosphor layer (3) emits light. The larger the applied voltage, the higher the optical brightness, and the higher the power source wave number, the higher the brightness. L
In either case, 41j11 degree luminance is high and the half-life is short.
丁なわち、現在まで前記従来例のML発光索予がほとん
ど賞月化されズいないのは初期の輝゛度が低いこと、電
源を付加して初期輝度を高くした場合には半減期寿命が
短かくなるためである。In other words, the reason why the conventional ML light emitting device has hardly been used until now is that the initial brightness is low, and when the initial brightness is increased by adding a power source, the half-life is short. This is because it becomes shorter.
ところで、ML発光索予の後光体層(3)を構成丁され
る、
@1
a、:螢光体層に用いる有機バインダーの誘電率
6、:螢光体粉末の誘電率
V、 11螢光体層の全体積に対する螢光体粉末の体
積分率
El:螢光体層に印加される電界
上記式から、螢光体層に用いる有機バインダーの誘電率
a、は高い程螢光体粉末に加わる電界が大きくなり、発
光輝度も大きくなることが判かる。By the way, the halo layer (3) of the ML light emitting device is composed of the following: @1 a: dielectric constant of the organic binder used in the phosphor layer: 6: dielectric constant of the phosphor powder: V: 11 Volume fraction El of the phosphor powder relative to the total volume of the phosphor layer: Electric field applied to the phosphor layer From the above equation, the higher the dielectric constant a of the organic binder used in the phosphor layer, the more it will be added to the phosphor powder. It can be seen that as the electric field increases, the luminance of light emission also increases.
従来多く用いられてきた有機樹脂バインダーは、シアノ
エチル化セルロース<tS;電岸11〜13)、フッ化
ビニリデン(同7〜8)、フッ化ビニリデン共重合体(
同7〜10)、エポキシ樹脂(同4〜5)が多く用いら
れてきた。LがL1シアノエチル化セルロースの場合、
接着力が極鳴番二弱いうえに可視性に乏L(誘電体層や
螢光体層の接着に問題が起る。この問題は可塑剤を使用
しく改善を計る場合もあるが、可塑剤は化学的に不安定
であり、KLL光素子の特性f:悪くする傾肉がある。Organic resin binders that have been widely used in the past include cyanoethylated cellulose <tS; Denkishi 11-13), vinylidene fluoride (Denkishi 7-8), and vinylidene fluoride copolymer (Denkishi 11-13).
7 to 10) and epoxy resins (4 to 5) have been widely used. When L is L1 cyanoethylated cellulose,
Adhesive strength is extremely weak and visibility is poor L (problems arise with adhesion of dielectric layers and phosphor layers. This problem can sometimes be improved by using plasticizers, but plasticizers is chemically unstable and has a tendency to deteriorate the characteristic f of the KLL optical element.
他方、フッ化ビニリデンはその誘電率が他の多くの有機
樹脂と比較して高いがそれでもシアノエチル化セルロー
スよりも誘電率が低くさらに接着力も良くないうえに作
業性も悪い、
そこで、接着力ならびに作業性を改善したフッ化ビニリ
デンの共重合体が用いられたが、シアノエチル化セルロ
ースよりも誘電率が低く、従って、シアノエチル化セル
ロースよりも発光輝度の低いものになつ【いた。また、
エポキシ樹脂は接着力が強いが可視性に乏L(誘電率も
低いのであまり用いられなかった。On the other hand, although vinylidene fluoride has a higher dielectric constant than many other organic resins, it still has a lower dielectric constant than cyanoethylated cellulose, and it also has poor adhesive strength and poor workability. A copolymer of vinylidene fluoride with improved properties was used, but it had a lower dielectric constant than cyanoethylated cellulose and therefore had lower luminance than cyanoethylated cellulose. Also,
Epoxy resin has strong adhesive strength but poor visibility (and low dielectric constant, so it was not used much).
本発明は上記の点に鑑み、初期の輝度を高くすることに
より電源条件を穏やかにし、半減期寿命t−改善したも
のである。そこで、本発明ではシアノエチル化ポリビニ
ルアルコール(誘電率14〜20)を螢光体層の有機バ
イングーとして用いることにより、発光輝度がシアノエ
チル化セルロースを用いた場合以上であり、Lかも、接
着力ならびに可視性の富んだELを作成することかでき
る。In view of the above-mentioned points, the present invention improves the half-life by increasing the initial brightness to moderate the power supply conditions. Therefore, in the present invention, by using cyanoethylated polyvinyl alcohol (dielectric constant 14 to 20) as an organic binder in the phosphor layer, the luminance is higher than that when cyanoethylated cellulose is used, and the adhesive strength and visible It is possible to create EL with rich sexuality.
以下、本発明のEL発九九素子1実施例を第1図に従つ
ズ説明する。先ず、厚さが0.1−のポリエステルシー
トから成る透明絶縁フィルム(1)上に酸化インジウム
と酸化錫とから成る透明導電被膜をスパッタリングや蒸
着により付着させ透光性の電極(2)を形成する。次に
、シアノエチル化ポリビニルアルコールをアセトン、メ
テルエナルケトン、アセト酢酸エナル等の極性溶媒に、
シアノエチル化ポリビニルアルコールと溶媒との重量配
合比が1=1〜1:10の溶液を作成し、これをビヒク
ルとL′C硫化硫化亜鉛銅やアルミニウムを注入した螢
光体粉末をシアノエチル化ポリビニルアルコールとの重
量配合比が1:1〜1:10になるようにL′C温合L
1し分液練した螢光体ペーストを作成する。該螢光体ペ
ースFf:前記電極(2)上に乾燥膜厚が10〜50μ
偏になるようにロールコータ−又は印刷、スプレー等で
塗布し乾燥して、螢光体層(3)を形成する。他方、前
に作成したシアノエチル化ポリビニルアルコールと溶媒
との溶液(ビヒクル)を用い、シアノエチル化ポリビニ
ルアルコールf:1としてTie、やBaTi0.等の
高誘電率粉末を重量比にして0.5〜3重量重量部上て
混合し、充分混練L7:II電体ペーストを作成し、該
誘電体ペーストをlθ〜50 /Q+sのアルミ箔がら
成る対向電極(5(上に乾燥膜厚が3〜20μになるよ
うにロールコータ〒又は印刷スプレー等で塗布乾燥して
誘電体層(4)を形成する。このようにしてできた螢光
体層(3;ど誘電体層(4)とをそれぞれ真空乾燥機の
中で残留溶媒を充分乾燥させてから、螢光体層(3)と
誘電体層(4)とを対向させて80〜170℃に加熱し
ながら10−/−〜80に#/aIの圧力で圧着する。Hereinafter, one embodiment of the EL device of the present invention will be explained with reference to FIG. First, a transparent conductive film made of indium oxide and tin oxide is deposited by sputtering or vapor deposition on a transparent insulating film (1) made of a polyester sheet with a thickness of 0.1 to form a transparent electrode (2). do. Next, cyanoethylated polyvinyl alcohol is dissolved in a polar solvent such as acetone, metherenalketone, or enal acetoacetate.
A solution with a weight mixing ratio of cyanoethylated polyvinyl alcohol and solvent of 1 = 1 to 1:10 is prepared, and the vehicle and L'C sulfide zinc sulfide phosphor powder injected with copper or aluminum are mixed with cyanoethylated polyvinyl alcohol. L'C heating L so that the weight mixing ratio with L is 1:1 to 1:10.
1. Prepare a phosphor paste by separating and kneading. The phosphor paste Ff: a dry film thickness of 10 to 50μ on the electrode (2)
The phosphor layer (3) is formed by applying it unevenly using a roll coater, printing, spraying, etc. and drying it. On the other hand, using the previously prepared solution (vehicle) of cyanoethylated polyvinyl alcohol and a solvent, Tie or BaTi0. Mix 0.5 to 3 parts by weight of high dielectric constant powder such as 0.5 to 3 parts by weight, thoroughly knead to make L7:II electric paste, and paste the dielectric paste into aluminum foil with lθ~50/Q+s. A dielectric layer (4) is formed on the counter electrode (5) by coating and drying it with a roll coater or printing spray to a dry film thickness of 3 to 20 μm. Layer (3) and dielectric layer (4) were each thoroughly dried to remove residual solvent in a vacuum dryer, and then the phosphor layer (3) and dielectric layer (4) were placed facing each other for 80 to 80 minutes. While heating to 170° C., press at a pressure of 10 −/− to 80 #/aI.
なお、圧着する場合には対向電極(5)の背面に厚みが
3〜10■のシリコンゴムを使用し螢光体層(3)の表
面凹凸になじむようにすることが望ましい。最後に、崗
囲f:3フッ化塩化エナレンの透明な保護フィルム(6
)で覆いKL発光素子を作成する。In the case of pressure bonding, it is desirable to use silicone rubber with a thickness of 3 to 10 cm on the back surface of the counter electrode (5) so that it conforms to the surface irregularities of the phosphor layer (3). Finally, a transparent protective film of enalene trifluorochloride (6
) to create a KL light emitting element.
$2図は、本発明の前記KL発光素子と従来のホリフツ
化ビニリデン共重合体を有機パイングーとしたKL発光
索予とを常温に’C100V、り。Figure 2 shows the KL light-emitting device of the present invention and the conventional KL light-emitting device using vinylidene trifluoride copolymer as an organic paint at room temperature at 100V.
Hzの電源で連続負荷試験を行なった結果を示し、図中
、(a)本発明に係るEL発光素子、(b)は従来のE
L発光素子をそれぞれ示したグラフである。The results of a continuous load test using a Hz power source are shown. In the figure, (a) the EL light emitting device according to the present invention, and (b) the conventional
It is a graph showing each L light emitting element.
同図から明らかなように本発明によるEL発光索予は初
期輝度が高く、従って、寿命特性も優れている。As is clear from the figure, the EL light emitting device according to the present invention has high initial brightness and therefore has excellent life characteristics.
その他の実施例では、シアノエチル化ポリビニルアルコ
ールに架橋剤を添加し、その耐湿特性ならびに耐熱特性
を向上させたものである。架橋剤としてはメラミンホル
ムアルデヒド系の商品名8X−303又は8X−325
C日本化成社製)をシアノエチル化ポリビニルアルコー
ルに対して1〜20%添加して、前述の実施例と同様な
配合により、螢光体ペーストおよび誘電体ペーストを作
成し1前述の実施例と同様な方法にまり塗布、乾燥、圧
着を行ないKL発光索予を作成する。なEL発光索予も
前記1実施例のように連続負荷試験を行った結果、初期
輝度が高く、寿命特性が優れているという顕著な効果を
奏している。In other examples, a crosslinking agent is added to cyanoethylated polyvinyl alcohol to improve its moisture resistance and heat resistance. As a crosslinking agent, use melamine formaldehyde product name 8X-303 or 8X-325.
A phosphor paste and a dielectric paste were prepared by adding 1 to 20% of C (manufactured by Nippon Kasei Co., Ltd.) to cyanoethylated polyvinyl alcohol and using the same formulation as in the previous example.1. A KL luminous index is prepared by coating, drying, and crimping using a suitable method. The EL light emitting device was also subjected to a continuous load test as in the first embodiment, and the results showed that the initial brightness was high and the life characteristics were excellent.
$1図はgL発光素子の要部断面図、第2図は従来例の
hL発光索予と本発明によるKL発光索予との連続負荷
試験を行なった結果を示すグラフである。
(11透明絶縁フィルム
(2) 週光性の電極
(3) 螢光体層
(4) 誘電体層
(5) 対向電極
(6) 防湿保護膜
第1図
第2図
(峙jlH)Figure 1 is a cross-sectional view of a main part of a gL light emitting element, and Figure 2 is a graph showing the results of a continuous load test on a conventional hL light emitting device and a KL light emitting device according to the present invention. (11 Transparent insulating film (2) Photoluminescent electrode (3) Fluorescent layer (4) Dielectric layer (5) Counter electrode (6) Moisture-proof protective film
Claims (2)
対する一組の電極間に螢光体層を設けたが又は螢光体層
と誘電体層の両層またはそのどちらが一方がシアノエチ
ル化ポリビニルアルコールをバインダーにして形成した
ことを特徴とするエレクトロルミネッセンス発光索子。(1) A phosphor layer is provided between a pair of opposing electrodes, at least one of which has a structure that allows light to pass through, or both the phosphor layer and the dielectric layer, or one of which is cyanoethylated polyvinyl. An electroluminescent light-emitting cord characterized by being formed using alcohol as a binder.
コールに架橋剤を添加したことを特徴とする特許請求の
範囲第1項記載のエレクトロルミネッセンス発光索子。(2) The electroluminescent light-emitting cord according to claim 1, wherein the binder is cyanoethylated polyvinyl alcohol to which a crosslinking agent is added.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57019213A JPS58137990A (en) | 1982-02-09 | 1982-02-09 | Electroluminescent light emitting element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57019213A JPS58137990A (en) | 1982-02-09 | 1982-02-09 | Electroluminescent light emitting element |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58137990A true JPS58137990A (en) | 1983-08-16 |
Family
ID=11993088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57019213A Pending JPS58137990A (en) | 1982-02-09 | 1982-02-09 | Electroluminescent light emitting element |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58137990A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60264095A (en) * | 1984-06-12 | 1985-12-27 | 関西日本電気株式会社 | Electric field light emitting lamp |
-
1982
- 1982-02-09 JP JP57019213A patent/JPS58137990A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60264095A (en) * | 1984-06-12 | 1985-12-27 | 関西日本電気株式会社 | Electric field light emitting lamp |
JPH047558B2 (en) * | 1984-06-12 | 1992-02-12 | Kansai Nippon Electric |
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