JPH034481A - Distributed electroluminescence element - Google Patents

Distributed electroluminescence element

Info

Publication number
JPH034481A
JPH034481A JP1139473A JP13947389A JPH034481A JP H034481 A JPH034481 A JP H034481A JP 1139473 A JP1139473 A JP 1139473A JP 13947389 A JP13947389 A JP 13947389A JP H034481 A JPH034481 A JP H034481A
Authority
JP
Japan
Prior art keywords
emitting layer
layer
light emitting
transparent electrode
water
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
JP1139473A
Other languages
Japanese (ja)
Inventor
Hiroshi Yamamoto
宏 山本
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.)
Maxell Ltd
Original Assignee
Hitachi Maxell 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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP1139473A priority Critical patent/JPH034481A/en
Publication of JPH034481A publication Critical patent/JPH034481A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To restrain deterioration of a light emitting layer caused by permeated moisture so as to achieve long life of a distributed electroluminescence element by covering the side face of a laminated body by means of the peripheral portion of a water collecting layer, the laminated body comprising a transparent electrode, the light emitting layer, a dielectric layer and a back electrode. CONSTITUTION:A transparent electrode 1 is stacked on a light emitting layer 4 from a transparent conductive film 3 side and is pressed and connected thereto whereby a laminated body comprising the transparent electrode 1, the light emitting layer 4, a dielectric layer 5 and a back electrode 6 is formed. Either one of two of water collecting layers 7, 8 disposed on respective upper and lower surfaces of the laminated body of the light emitting layer 4, etc., is enlarged and the side face of the laminated body is covered by the peripheral portion 7 of either one of the water collecting layers. Moisture permeating through an adhesive layer of armouring bodies 9, 10 and invading the inside of the element is collected by the peripheral portion 7a of the water collecting layers. Deterioration of the light emitting layer 4 from the side face of the laminated body is restrained so that the element can be used over a long time.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は分散型エレクトロルミネッセンス素子(以下、
「エレクトロルミネッセンス素子」をrEL素子」とい
う)に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a distributed electroluminescent device (hereinafter referred to as
``electroluminescent device'' is referred to as ``rEL device'').

〔従来の技術〕[Conventional technology]

従来の分散型EL素子は、第4〜5図に示すように、透
明電極(1)と、発光層(4)と、誘電層(5)と、背
面電極(6)とを積層し、その積層体の上面および下面
に捕水N(7)、(8)を配置し、その捕水層(7)、
(8)の上面および下面に防湿フィルムを主材とする外
装体(9)、00)を配置し、外装体(9)、00)の
周辺部でその接着剤層(9a)、(10a)同士を接着
させてそれらの接合部を封止する構成をとっていた。
As shown in Figures 4 and 5, a conventional dispersion type EL element has a transparent electrode (1), a light-emitting layer (4), a dielectric layer (5), and a back electrode (6) stacked on top of each other. Water-trapping layers (7) and (8) are arranged on the upper and lower surfaces of the laminate, and the water-trapping layers (7),
Exterior bodies (9), 00) mainly made of moisture-proof film are arranged on the upper and lower surfaces of (8), and adhesive layers (9a), (10a) are arranged around the exterior bodies (9), 00). The structure was such that the joints were sealed by adhering them together.

しかし、このような分散型EL素子では、−方の捕水層
(7)が上記積層体の透明電極(1)の透明基板凹側の
上面に配置し、他方の捕水層(8)が上記積層体の背面
電極(6)の下面に配置しているだけであるため、積層
体の上面および下面方向に関しては、外装体(9)、O
lを透過した水分を捕水層(7)、(8)が充分に捕水
することができるものの、上記積層体の側面方向に関し
ては、外装体(9)、0ωの接着剤層(9a)、(10
a)などを透過してきた水分を捕水層(7)、(8)が
充分に捕水することができず、その結果、発光層(4)
中の蛍光体が水分と反応して劣化し、分散型EL素子の
寿命が低下するという問題があった。
However, in such a distributed EL element, the - side water-catching layer (7) is arranged on the upper surface of the concave side of the transparent substrate of the transparent electrode (1) of the above-mentioned laminate, and the other water-catching layer (8) Since it is only disposed on the lower surface of the back electrode (6) of the laminate, in the direction of the upper and lower surfaces of the laminate, the exterior body (9), O
Although the water absorption layers (7) and (8) can sufficiently capture the moisture that has passed through the , (10
The water-catching layers (7) and (8) cannot sufficiently capture the water that has passed through a), etc., and as a result, the light-emitting layer (4)
There was a problem in that the phosphor inside reacted with moisture and deteriorated, reducing the lifespan of the dispersed EL element.

C発明が解決しようとする課題〕 本発明は、上記のように従来の分散型EL素子では、積
層体の側面方向から透過してきた水分を充分に捕水する
ことができず、そのため、分散型EL素子の寿命が低下
したという問題点を解決し、積層体の側面方向から透過
してきた水分を充分に捕水することができ、したがって
透過水分による発光層の劣化が少ない長寿命の分散型E
L素子を提供することを目的とする。
C Problems to be Solved by the Invention] As mentioned above, the conventional dispersion type EL element is unable to sufficiently capture water that permeates from the side surface of the laminate. The long-life distributed type E solves the problem of reduced lifespan of EL elements and can sufficiently capture moisture that permeates from the sides of the laminate, resulting in less deterioration of the light-emitting layer due to the permeated moisture.
The purpose is to provide an L element.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は、上記発光層などの積層体の上面および下面に
配置する2層の捕水層のうちのいずれか一方を大きくし
て、上記積層体の側面をいずれか一方の捕水層の周辺部
で覆うことにより、上記目的を達成したものである。
In the present invention, one of the two water-trapping layers disposed on the upper surface and the lower surface of the laminate such as the light-emitting layer is enlarged, and the side surface of the laminate is formed around one of the water-trapping layers. The above objective was achieved by covering the area with

すなわち、上記のように積層体の側面を捕水層の周辺部
で覆っているので、外装体の接着剤層などを透過して素
子内に侵入してきた水分が上記の捕水層の周辺部で捕水
され、積層体の側面からの水分による発光層の劣化が抑
制されるので、分散型EL素子が長時間使用できるよう
になり、長寿命化する。
In other words, since the side surface of the laminate is covered with the peripheral part of the water-catching layer as described above, moisture that has penetrated through the adhesive layer of the exterior body and entered the element will be absorbed into the peripheral part of the water-catching layer. Since the deterioration of the light-emitting layer due to moisture from the side surfaces of the laminate is suppressed, the dispersion type EL element can be used for a long time, and its lifespan is extended.

〔実施例〕〔Example〕

つぎに本発明の実施例を図面に基づいて説明する。 Next, embodiments of the present invention will be described based on the drawings.

第1〜3図は本発明の分散型EL素子の一実施例を示す
もので、第1図はその縦断面図であり、第3図のA−A
線断面図に相当する図である。第2図は第1図に直交す
る断面での分散型EL素子の縦断面図であって、第3図
のB−B線断面図に相当する図である。第3図は分散型
EL素子の概略平面図である。
1 to 3 show an embodiment of the dispersion type EL element of the present invention, FIG. 1 is a longitudinal cross-sectional view thereof, and FIG.
It is a figure equivalent to a line sectional view. FIG. 2 is a longitudinal sectional view of the dispersion type EL element in a cross section perpendicular to FIG. 1, and corresponds to the sectional view taken along the line B--B in FIG. 3. FIG. 3 is a schematic plan view of the distributed EL element.

図中、(1)は透明電極であり、この透明電極(1)は
、厚さ75μmのポリエチレンテレフタレートフィルム
からなる透明基板凹の一方の面に厚さ10(l nm(
1000人)のITO(インジウム錫酸化物)の透明導
電膜(3)を形成したものである。
In the figure, (1) is a transparent electrode, and this transparent electrode (1) has a thickness of 10 nm (
A transparent conductive film (3) of ITO (indium tin oxide) of 1,000% was formed.

(4)は発光層で、(5)は誘導層であり、(6)は背
面電極である。この背面電極(6)は厚さ1100tI
のアルミニウム箔からなり、上記誘導層(5)は、この
背面電極(6)上にチタン酸バリウムなどの高誘電体粉
末とシアノエチル化プルランなどの有機バインダーとを
主材とする誘電体層形成用のペーストを塗布し、乾燥す
ることによって形成したものである。上記発光層(4)
は、この誘電層(5)上にZnS:Cu、CIなどの蛍
光体とシアノエチル化プルランなどの有機バインダーと
を主材とする発光層形成用のペーストを塗布し、乾燥す
ることによって形成したものである。
(4) is a light emitting layer, (5) is a dielectric layer, and (6) is a back electrode. This back electrode (6) has a thickness of 1100 tI.
The dielectric layer (5) is formed of a dielectric layer formed on the back electrode (6) mainly of a high dielectric constant powder such as barium titanate and an organic binder such as cyanoethylated pullulan. It was formed by applying a paste and drying it. The light emitting layer (4)
is formed by applying a paste for forming a light-emitting layer mainly consisting of a phosphor such as ZnS:Cu or CI and an organic binder such as cyanoethylated pullulan on this dielectric layer (5) and drying it. It is.

そして、この発光層(4)上に前記透明電極(1)をそ
の透wA導電M (3)@から重ね合わせて圧着するこ
とにより、透明電極(1)と発光層(4)と誘電層(5
)と背面電極(6)との積層体が形成されている。
Then, the transparent electrode (1) is overlaid and pressure-bonded on the light emitting layer (4) from its transparent wA conductive M (3)@, so that the transparent electrode (1), the light emitting layer (4) and the dielectric layer ( 5
) and a back electrode (6) are formed.

(7)、(8)はそれぞれ厚さ12077mのナイロン
6フィルムからなる捕水層で、捕水層(7)は上記積層
体の透明電極(1)の上面に配置し、その周辺部(7a
)が積層体の側面を覆い、捕水層(8)は上記積層体の
背面電極(6)の下面に配置している。
(7) and (8) are water-catching layers each made of a nylon 6 film with a thickness of 12,077 m, and the water-catching layer (7) is arranged on the upper surface of the transparent electrode (1) of the above-mentioned laminate.
) covers the side surfaces of the laminate, and the water-trapping layer (8) is disposed on the lower surface of the back electrode (6) of the laminate.

(9)、Olは防湿フィルムを基材とする外装体であり
、この外装体(9)、0■はそれぞれ一方の面に接着剤
層(9a)、(10a)を有し、外装体(9)は捕水層
(7)の上面に配置し、他方の外装体aωは捕水層(8
)の下面に配置し、これらの外装体(9)、oIIlは
、その周辺部において接着剤層(9a)、(10a)同
士をプレスなどで加熱して接着させ、それらの接合部を
封止している。
(9) and Ol are exterior bodies based on moisture-proof film, and these exterior bodies (9) and 0■ have adhesive layers (9a) and (10a) on one side, respectively, and exterior bodies ( 9) is placed on the upper surface of the water-catching layer (7), and the other exterior body aω is placed on the top surface of the water-catching layer (8).
), and these exterior bodies (9) and oIIl are bonded together by heating the adhesive layers (9a) and (10a) in their peripheral parts using a press, etc., and sealing the joints. are doing.

上記の外装体(9)、0ωは両者とも三弗化塩化エチレ
ンフィルムからなる防湿フィルムの一方の面に接着剤層
(9a)、(10a)としてポリエチレンなどの低融点
樹脂のフィルムをラミネートすることによフて形成され
たものである。
The above-mentioned exterior body (9) and 0ω are both made by laminating a film of low melting point resin such as polyethylene as an adhesive layer (9a) and (10a) on one side of a moisture-proof film made of trifluorochloroethylene film. It was formed by

第3図中の00は透明電極のリード端子であり、この透
明電極のリード体(10は、その取付状態を図示してい
ないが、その一端が前記積層体の形成時に透明電極(1
)の透明導電膜(3)に取り付けられ、他端は外装体(
9)、θωの接合部の側端から外部に引き出されている
00 in FIG. 3 is a lead terminal of the transparent electrode, and one end of the lead body (10 is not shown in the attached state) of the transparent electrode is the transparent electrode (10) when the laminate is formed.
) is attached to the transparent conductive film (3), and the other end is attached to the exterior body (
9), is pulled out from the side end of the joint of θω.

また、第3図中の021は背面電極のリード端子であり
、この背面電極のリード端子0りは、上記透明電極のリ
ード端子θ0と同様にその取付状態を図示していないが
、その一端が前記積層体の形成時に背面電極(6)の下
面(つまり、誘電層(5)が形成されていない側の面)
に取り付けられ、他端は外装体(9)、aωの接合部の
側端から外部に引き出されている。
Further, 021 in FIG. 3 is a lead terminal of the back electrode, and like the lead terminal θ0 of the transparent electrode, the attached state of the lead terminal 02 of the back electrode is not shown in the figure, but one end of the lead terminal 021 is the lead terminal of the back electrode. The lower surface of the back electrode (6) (that is, the surface on which the dielectric layer (5) is not formed) when forming the laminate.
The other end is pulled out from the side end of the joint of the exterior body (9) and aω.

上記実施例に示すように、本発明の分散型EL素子は、
透明電極(1)と発光層(4)と誘電層(5)と背面電
極(6)との積層体の側面が捕水層(7)の周辺部(7
a)によって覆われているので、外装体(9)、0ωの
接着剤層(9a)、(10a)などを透過して素子内部
に侵入してきた水分を上記捕水層a)の周辺部(7a)
によって充分に捕水することができる。
As shown in the above examples, the distributed EL device of the present invention is
The side surface of the laminate of the transparent electrode (1), the light-emitting layer (4), the dielectric layer (5), and the back electrode (6) is the peripheral part (7) of the water-trapping layer (7).
Since it is covered by water absorbing layer a), the water that has penetrated into the element through the exterior body (9), 0ω adhesive layers (9a), (10a), etc. is removed from the surrounding area of water absorption layer a) ( 7a)
can capture sufficient water.

したがって、従来の分散型EL素子に比べて、透過水分
による発光層(4)の劣化が少なくなり、長時間使用で
き、いわゆる長寿命である。
Therefore, compared to conventional dispersion type EL elements, the light-emitting layer (4) is less degraded by transmitted moisture and can be used for a long time, resulting in a so-called long life.

次の第1表は、上記実施例に示す本発明の分散型EL素
子と第4〜5図に示す従来の分散型EL素子の輝度半減
期を比較して示すものである。
Table 1 below compares the luminance half-life of the dispersion type EL device of the present invention shown in the above embodiment and the conventional dispersion type EL device shown in FIGS. 4 and 5.

輝度半減期の測定は、両EL素子を20℃、相対湿度6
5%の雰囲気中で1oov、400Hzの交流電圧を印
加して駆動し、輝度が初期輝度の1/2に低下するまで
の駆動時間を測定することによって行ったものである0
両EL素子は、捕水層(7)の構成が異なる〔つまり、
本発明のものでは、捕水層(7)の周辺部(7a)が積
層体の側面を覆っているが、従来のものでは、いずれの
捕水層とも積層体の側面を覆っていない〕以外は同じ構
成で作製されている。
The luminance half-life was measured at 20°C and relative humidity of 6.
This was done by applying an AC voltage of 100 Hz and 400 Hz in a 5% atmosphere, and measuring the driving time until the brightness decreased to 1/2 of the initial brightness.
Both EL elements have different configurations of the water-trapping layer (7) [that is,
In the case of the present invention, the peripheral part (7a) of the water-catching layer (7) covers the side surface of the laminate, but in the conventional case, neither of the water-catching layers covers the side surface of the laminate. are made with the same configuration.

第1表 第1表に示すように、本発明の分散型EL素子は、従来
の分散型EL素子(第1表では、従来品で示す)に比べ
て、輝度半減期が大きく、長時間使用可能で、長寿命で
あることを示している。
Table 1 As shown in Table 1, the dispersion type EL element of the present invention has a longer luminance half-life than the conventional dispersion type EL element (shown as conventional product in Table 1), and can be used for a long time. This shows that it is possible and has a long lifespan.

なお、上記実施例で示した分散型EL素子の各構成部材
の材質、寸法などは、実施例のものについてのみ示した
ものであって、実施例に例示のものと異なる材質、寸法
のものを使用することも、もちろん可能である。
The materials and dimensions of each component of the dispersion type EL element shown in the above examples are shown only for the examples, and materials and dimensions different from those exemplified in the examples are not included. Of course, it is also possible to use

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明では、透明電極と発光層と
誘電層と背面電極との積層体の側面を捕水層の周辺部で
覆うことにより、透過水分による発光層の劣化が少ない
、長寿命の分散型EL素子を提供することができた。
As explained above, in the present invention, by covering the side surfaces of the laminate of the transparent electrode, the light-emitting layer, the dielectric layer, and the back electrode with the peripheral part of the water-trapping layer, the light-emitting layer is less likely to deteriorate due to permeated moisture and can be used for a long time. It was possible to provide a long-life distributed EL element.

【図面の簡単な説明】[Brief explanation of the drawing]

第1〜3図は本発明の分散型EL素子の一実施例を示す
ものであり、第1図はその縦断面図で、第3図のA−A
線断面図に相当する図であり、第2図は第1図に直交す
る断面での縦断面図で、第3図のB−B線断面図に相当
する図である。第3図は分散型EL素子の概略平面図で
ある。第4〜5図は従来の分散型EL素子を示すもので
あり、第4図はその縦断面図で、第5図は第4図に直交
する断面での縦断面図である。 (1)・・・透明電極、 (2)・・・透明基板、 (
3)・・・透明導電膜、 (4)・・・発光層、 (5
)・・・誘電層、(6)・・・背面電極、 (7)・・
・捕水層、 (7a)・・・周辺部、(8)・・・捕水
層、 (9)、001・・・外装体、(9a)、(10
a)・・・接着剤層
1 to 3 show an embodiment of the dispersion type EL element of the present invention, and FIG. 1 is a longitudinal cross-sectional view thereof, and FIG.
2 is a longitudinal sectional view taken in a section orthogonal to FIG. 1, and is a diagram equivalent to the BB sectional view in FIG. 3. FIG. FIG. 3 is a schematic plan view of the distributed EL element. 4 and 5 show a conventional dispersion type EL element, with FIG. 4 being a longitudinal sectional view thereof, and FIG. 5 being a longitudinal sectional view taken in a cross section orthogonal to FIG. 4. (1)...Transparent electrode, (2)...Transparent substrate, (
3)...Transparent conductive film, (4)...Light emitting layer, (5
)...dielectric layer, (6)...back electrode, (7)...
・Water-catching layer, (7a)...Peripheral part, (8)...Water-catching layer, (9), 001...Exterior body, (9a), (10
a)...adhesive layer

Claims (1)

【特許請求の範囲】[Claims] (1) 透明電極(1)と、発光層(4)と、誘電層(
5)と、背面電極(6)と、捕水層(7)、(8)と、
外装体(9)、(10)を有し、 上記透明電極(1)は、透明基板凹と透明導電膜(3)
を有し、 上記外装体(9)、(10)は、それぞれ一方の面に接
着剤層(9a)、(10a)を有し、 上記透明電極(1)と、発光層(4)と、誘電層(5)
と、背面電極(6)とは、積層され、 上記の透明電極(1)と発光層(4)と誘電層(5)と
背面電極(6)との積層体においては、透明電極(1)
の透明導電膜(3)が発光層(4)と接触しており、上
記捕水層(7)、(8)は、それぞれ、上記透明電極(
1)と発光層(4)と誘電層(5)と背面電極(6)と
の積層体の上面および下面に配置し、かつ上記捕水層(
7)、(8)のいずれか一方の周辺部が、上記透明電極
(1)と発光層(4)と誘電層(5)と背面電極(6)
との積層体の側面を覆い、 上記外装体(9)、(10)は、それぞれ、上記捕水層
(7)、(8)の上面および下面に配置し、かつ上記外
装体(9)、(10)は、その周辺部において、それら
の接着剤層(9a)、(10a)同士を接着させること
により、それらの接合部を封止していることを特徴とす
る、 分散型エレクトロルミネッセンス素子。
(1) A transparent electrode (1), a light emitting layer (4), and a dielectric layer (
5), a back electrode (6), a water trapping layer (7), (8),
It has exterior bodies (9) and (10), and the transparent electrode (1) has a transparent substrate recess and a transparent conductive film (3).
The exterior bodies (9) and (10) each have an adhesive layer (9a) and (10a) on one surface, and the transparent electrode (1) and the light emitting layer (4), Dielectric layer (5)
and the back electrode (6) are laminated, and in the above laminate of the transparent electrode (1), the light emitting layer (4), the dielectric layer (5), and the back electrode (6),
The transparent conductive film (3) is in contact with the light emitting layer (4), and the water absorption layers (7) and (8) are in contact with the transparent electrode (3), respectively.
1), a light-emitting layer (4), a dielectric layer (5), and a back electrode (6).
7) The peripheral part of either one of (8) is the transparent electrode (1), the light emitting layer (4), the dielectric layer (5) and the back electrode (6).
The exterior bodies (9) and (10) are arranged on the upper and lower surfaces of the water-trapping layers (7) and (8), respectively, and the exterior bodies (9) and (10) is a distributed electroluminescent element characterized in that the adhesive layers (9a) and (10a) are adhered to each other in the periphery to seal the joint thereof. .
JP1139473A 1989-05-31 1989-05-31 Distributed electroluminescence element Pending JPH034481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1139473A JPH034481A (en) 1989-05-31 1989-05-31 Distributed electroluminescence element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1139473A JPH034481A (en) 1989-05-31 1989-05-31 Distributed electroluminescence element

Publications (1)

Publication Number Publication Date
JPH034481A true JPH034481A (en) 1991-01-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP1139473A Pending JPH034481A (en) 1989-05-31 1989-05-31 Distributed electroluminescence element

Country Status (1)

Country Link
JP (1) JPH034481A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040019502A (en) * 2002-08-28 2004-03-06 주식회사 엘리아테크 Organic electro-luminescence display panel using photoresist and fabricating method thereof
US7465963B2 (en) 2001-02-08 2008-12-16 Samsung Sdi Co., Ltd. Organic EL device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7465963B2 (en) 2001-02-08 2008-12-16 Samsung Sdi Co., Ltd. Organic EL device
KR20040019502A (en) * 2002-08-28 2004-03-06 주식회사 엘리아테크 Organic electro-luminescence display panel using photoresist and fabricating method thereof

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