JPS62262393A - Electric field light emitting device - Google Patents
Electric field light emitting deviceInfo
- Publication number
- JPS62262393A JPS62262393A JP61103837A JP10383786A JPS62262393A JP S62262393 A JPS62262393 A JP S62262393A JP 61103837 A JP61103837 A JP 61103837A JP 10383786 A JP10383786 A JP 10383786A JP S62262393 A JPS62262393 A JP S62262393A
- Authority
- JP
- Japan
- Prior art keywords
- sulfur
- phosphor
- present
- light emitting
- electric field
- 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
- 230000005684 electric field Effects 0.000 title 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 27
- 229910052717 sulfur Inorganic materials 0.000 claims description 21
- 239000011593 sulfur Substances 0.000 claims description 21
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 20
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 7
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 2
- 229910002113 barium titanate Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- KXJGSNRAQWDDJT-UHFFFAOYSA-N 1-acetyl-5-bromo-2h-indol-3-one Chemical compound BrC1=CC=C2N(C(=O)C)CC(=O)C2=C1 KXJGSNRAQWDDJT-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000011354 acetal resin Substances 0.000 description 1
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- -1 for example Chemical compound 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Electroluminescent Light Sources (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】 〔発明の目的〕 （産業上の利用分野） 本発明は電場発光素子に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to an electroluminescent device.
（従来の技術）
電場発光素子特に分散型電場発光素子は、その構造上、
大形表示面が容易、かつ安価に製造でき。(Prior Art) Electroluminescent elements, especially distributed electroluminescent elements, have the following characteristics due to their structure:
Large display screens can be manufactured easily and inexpensively.
しかも軽量で可撓性を持たせることもできるという優れ
た特性を有する。さらに、各種の蛍光体を使用すること
により１種々の発光色の素子が容易に得られるという利
点もある。Moreover, it has excellent properties such as being lightweight and flexible. Furthermore, by using various phosphors, there is an advantage that elements emitting light of various colors can be easily obtained.
しかしながら、このような電場発光素子は寿命が短いと
いう欠点があるため、その実用化が妨げられている。However, such electroluminescent elements have a short lifespan, which hinders their practical use.
このような欠点に対処して、従来、たとえば蛍光体の劣
化を促進する水分の素子内への侵入を防ぐことに注力し
て種々の対策がとられていた。すなわち、透湿性の少な
い樹脂製封止部材の採用。To deal with these drawbacks, various measures have been taken in the past, focusing on preventing moisture from entering the device, which would promote deterioration of the phosphor, for example. In other words, a resin sealing member with low moisture permeability is used.
素子内への吸湿剤の混入あるいは低湿度雰囲気下での素
子製造方法等が試みられたが２問題解決には至らなかっ
た。Attempts have been made to incorporate a moisture absorbent into the device or to manufacture the device in a low humidity atmosphere, but these two problems have not been solved.
また、特開昭５７−１９６４９５号公報には、従来から
蛍光体分散バインダーとして一般に使用されているアセ
タール樹脂、エポキシ樹脂、シアノエチルセルローズ、
および弗素系樹脂等に代えて硫黄を上記分散バインダー
として用いることにより。In addition, JP-A-57-196495 discloses acetal resin, epoxy resin, cyanoethyl cellulose, which has been commonly used as a phosphor dispersion binder,
and by using sulfur as the above-mentioned dispersion binder in place of the fluorine-based resin or the like.
良好な寿命特性が得られたとの記載がある。しかしなが
ら１本発明者等の追試によれば、このような方法で製造
した電場発光素子はその初期輝度が極めて低く、実用に
供し得ないことが判った。It is stated that good life characteristics were obtained. However, according to additional tests conducted by the present inventors, it was found that the electroluminescent device manufactured by this method had an extremely low initial luminance and could not be put to practical use.
（発明が解決しようとする問題点）
上記したように、従来の電場発光素子は蛍光体の輝度劣
化によって寿命が短かく、一方、寿命を改善しようとす
ると初期輝度が低下するという欠点を生じた。(Problems to be Solved by the Invention) As mentioned above, conventional electroluminescent elements have a short lifespan due to deterioration in the brightness of the phosphor, and on the other hand, attempts to improve the lifespan have resulted in the drawback that the initial brightness decreases. .
そこで本発明は以上の欠点を除去するもので。Therefore, the present invention aims to eliminate the above drawbacks.
初期輝度が高く、シかも寿命特性の優れた電場発光素子
を提供することを目的とする。An object of the present invention is to provide an electroluminescent element with high initial brightness and excellent long life characteristics.
（問題点を解決するだめの手段）
本発明の電場発光素子では、透明電極と背面電極との間
に硫化物蛍光体層および誘電体層を設け。(Means for solving the problem) In the electroluminescent device of the present invention, a sulfide phosphor layer and a dielectric layer are provided between the transparent electrode and the back electrode.
硫化物蛍光体層と背面電極との中間に位置する上記誘電
体層に硫黄を含有せしめることにより構成される。It is constructed by incorporating sulfur into the dielectric layer located between the sulfide phosphor layer and the back electrode.
（作用）
本発明の電場発光素子においては、寿命中に硫化物蛍光
体結晶より硫黄分が脱離して結晶中に欠陥を生じるよう
な事態が発生しても、蛍光体層には硫黄を含有した誘電
体層が密着しているから。(Function) In the electroluminescent device of the present invention, even if a situation occurs in which sulfur content is desorbed from the sulfide phosphor crystal during its life and defects are generated in the crystal, the phosphor layer does not contain sulfur. This is because the dielectric layers are in close contact with each other.
この硫黄が上記蛍光体から脱離する硫黄分を補ない、寿
命中の大幅な輝度劣化を防止できる。しかも、上記硫黄
を含有する誘電体層は、蛍光体層と背面電極との中間、
つまり蛍光体からの光が放射される方向にはないので、
硫黄が光の通路を遮えぎることはなく、シたがって初期
輝度を低下させることもなくなる。This sulfur compensates for the sulfur content released from the phosphor, and can prevent significant brightness deterioration during the life of the phosphor. Moreover, the sulfur-containing dielectric layer is located between the phosphor layer and the back electrode.
In other words, it is not in the direction in which the light from the phosphor is emitted, so
The sulfur will not block the path of light and therefore will not reduce the initial brightness.
（実施例）
以下２図面に示した実施例に基づいて本発明の詳細な説
明する。第１図は本発明の電場発光素子の平面図、第２
図は同じく縦断面図（説明の便宜上誇張して示す。）を
示し、（１）はインジウム・錫酸化物からなる透明電極
（２）をその表面に被着形成した樹脂基板、（３）は蛍
光体層で、電場発光硫化物蛍光体たとえばＺｎＳ ：
Ｃｕ、 Ｃ６と有機バインダーと混練したペーストを上
記透明電極（２）上にスクリーン印刷法で厚さ約３５μ
に塗布した後、焼成して形成される。（４）は硫黄を含
有した誘電体層で、たとえばチタン酸バリウムに３０重
量％の硫黄を混合し。(Example) The present invention will be described in detail below based on an example shown in two drawings. FIG. 1 is a plan view of the electroluminescent device of the present invention, and FIG.
The figure also shows a longitudinal cross-sectional view (exaggerated for convenience of explanation), in which (1) is a resin substrate on which a transparent electrode (2) made of indium-tin oxide is adhered, and (3) is a resin substrate. In the phosphor layer, an electroluminescent sulfide phosphor such as ZnS:
A paste made by kneading Cu, C6 and an organic binder was screen printed onto the transparent electrode (2) to a thickness of about 35 μm.
It is formed by coating and firing. (4) is a dielectric layer containing sulfur, for example, barium titanate mixed with 30% by weight of sulfur.
この混合物を同様に有機バインダーと混練したペースト
を作成し、たとえばアルミニウムからなる背面電極（５
）上に１５μの厚さにスクリーン印刷法で塗布した後、
乾燥、焼成して形成される。ついで。A paste is prepared by kneading this mixture with an organic binder in the same way, and a paste is prepared by kneading this mixture with an organic binder.
) by screen printing method to a thickness of 15μ,
It is formed by drying and firing. Next.
上記蛍光体層（３）を形成した樹脂基板（１）と、硫黄
を含む誘電体層（４）を形成した背面電極（５）とをは
り合わせ、この積層体（６）を上、下から内面に熱可履
性樹脂層（図示しない。）を形成したたとえば３弗化塩
化エチレンからなる封止剤フィルム（７）で挾み。The resin substrate (1) on which the phosphor layer (3) is formed and the back electrode (5) on which the sulfur-containing dielectric layer (4) is formed are bonded together, and this laminate (6) is then layered from above and below. It is sandwiched between a sealant film (7) made of, for example, trifluorochloroethylene and having a thermoplastic resin layer (not shown) formed on the inner surface.
熱ローラーにかけて熱圧着すれば、上記積層体（６）は
封止用フィルム（７）によって気密に被覆保護される。When the laminate (6) is bonded by heat and pressure using a hot roller, the laminate (6) is hermetically covered and protected by the sealing film (7).
なお、（８）は透明電極（２）に接続するリード線。Note that (8) is a lead wire connected to the transparent electrode (2).
（９）は背面電極（５）に接続するリード線である。(9) is a lead wire connected to the back electrode (5).
このような電場発光素子の両電極（２１、（５１間に交
流電圧を印加すると蛍光体層（３）が発光し、光は透明
電極（２）を被着した樹脂基板（１）を透過して前方に
放射される。When an alternating current voltage is applied between the electrodes (21, (51) of such an electroluminescent element, the phosphor layer (3) emits light, and the light passes through the resin substrate (1) covered with the transparent electrode (2). and radiates forward.
次に蛍光体の分散バインダーとして蛍光体と同量（容積
比）の硫黄を使用した前述の従来電場発光素子と、上記
本発明電場発光素子とを２ ＫＨｚ −１２０ｖで点灯
し、初期輝度を測定したところ、従来のものが３７．８
ｎｔであったのに対し１本発明のものは２２０ｎｔと大
幅な輝度向上が認められた。Next, the above-mentioned conventional electroluminescent device using the same amount (volume ratio) of sulfur as the phosphor as a dispersed binder of the phosphor and the above-mentioned electroluminescent device of the present invention were turned on at 2 KHz -120V, and the initial brightness was measured. As a result, the conventional one was 37.8
nt, whereas that of the present invention was 220 nt, which was a significant improvement in brightness.
これは硫黄を蛍光体層（３）と背面電極（５）との中間
に設ける誘電体層（４）中に含有せしめるようにしたの
で、硫黄の存在位置は蛍光体層（３）から放射される光
を違えざることがなく、シたがって初期輝度の大幅な低
下が防止できるためである。This is because sulfur is contained in the dielectric layer (4) provided between the phosphor layer (3) and the back electrode (5), so the location of sulfur is not radiated from the phosphor layer (3). This is because there is no choice but to use different light, and therefore a significant drop in initial brightness can be prevented.
ついで、特別には硫黄分を添加しない別の従来電場発光
素子と、上記本発明電場発光素子との寿命特性（輝度寿
命）曲線の比較図を第３図に示す。Next, FIG. 3 shows a comparison diagram of the life characteristics (brightness life) curves of another conventional electroluminescent element to which no sulfur content is added and the electroluminescent element of the present invention.
試験条件は２５℃、湿度６０％の雰囲気中で５００Ｈｚ
−１００Ｖで点灯した。Test conditions were 500Hz in an atmosphere of 25℃ and 60% humidity.
It turned on at -100V.
図から明らかなように本発明の寿命改善効果は顕著なも
のが認められる。これは、寿命中における硫化物蛍光体
結晶からの硫黄分脱離に起因する輝度劣化を、蛍光体層
（３）に隣接して密着する誘電体層（４）中に含まれる
硫黄が補なうためである。As is clear from the figure, the life-improving effect of the present invention is significant. This is because the sulfur contained in the dielectric layer (4) that is in close contact with the phosphor layer (3) compensates for the brightness deterioration caused by the desorption of sulfur from the sulfide phosphor crystal during its lifetime. This is for the purpose of
なお２本発明の構成によれば、添加する硫黄は蛍光体層
から放射される光を遮えぎらない位置にあるから、その
量を多く添加しても初期輝度には全く影響がなく、必要
充分な量を添加できる。2. According to the structure of the present invention, the added sulfur is located at a position where it does not block the light emitted from the phosphor layer, so even if a large amount of sulfur is added, it has no effect on the initial brightness and is not necessary. A sufficient amount can be added.
また、基板の材質は樹脂に限られるものではなく、たと
えばガラスであっても良いし、さらに誘電体もチタン酸
バリウムに限定されるものではないＯ
〔発明の効果〕
以上述べたように本発明の構成によれば、蛍光体の劣化
防止のため添加する硫黄は、蛍光体層と背面電極との中
間に位置する誘電体層中に存在させるようにしたので、
初期輝度の大幅な低下をきたすことなしに寿命特性を改
善できる電場発光素子を提供することができる。Further, the material of the substrate is not limited to resin, and may be glass, for example, and the dielectric material is not limited to barium titanate. [Effects of the Invention] As described above, the present invention According to the structure, the sulfur added to prevent deterioration of the phosphor is present in the dielectric layer located between the phosphor layer and the back electrode.
It is possible to provide an electroluminescent element whose lifetime characteristics can be improved without causing a significant decrease in initial brightness.
第１図は本発明電場発光素子の一実施例の平面図、第２
図は同じくその縦断面図、第３図は本発明電場発光素子
と従来の電場発光素子との寿命特性の比較図を示す。
（１）・・・・・・樹脂基板、（２）・・・・・・透明
電極。
（３）・・・・・・蛍光体層、（４）・・・・・・誘電
体層。FIG. 1 is a plan view of one embodiment of the electroluminescent device of the present invention, and FIG.
The figure also shows a longitudinal cross-sectional view thereof, and FIG. 3 shows a comparison diagram of the life characteristics of the electroluminescent device of the present invention and a conventional electroluminescent device. (1)...Resin substrate, (2)...Transparent electrode. (3)...phosphor layer, (4)...dielectric layer.
Claims (1)
電体層を設けた電場発光素子において，硫化物蛍光体層
と背面電極との中間に位置する上記誘電体層に硫黄を含
有せしめたことを特徴とする電場発光素子。In an electroluminescent device in which a sulfide phosphor layer and a dielectric layer are provided between a transparent electrode and a back electrode, the dielectric layer located between the sulfide phosphor layer and the back electrode contains sulfur. An electroluminescent device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61103837A JPS62262393A (en) | 1986-05-08 | 1986-05-08 | Electric field light emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61103837A JPS62262393A (en) | 1986-05-08 | 1986-05-08 | Electric field light emitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62262393A true JPS62262393A (en) | 1987-11-14 |
Family
ID=14364534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61103837A Pending JPS62262393A (en) | 1986-05-08 | 1986-05-08 | Electric field light emitting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62262393A (en) |
-
1986
- 1986-05-08 JP JP61103837A patent/JPS62262393A/en active Pending
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