JPH02260388A - El luminous device - Google Patents
El luminous deviceInfo
- Publication number
- JPH02260388A JPH02260388A JP1081283A JP8128389A JPH02260388A JP H02260388 A JPH02260388 A JP H02260388A JP 1081283 A JP1081283 A JP 1081283A JP 8128389 A JP8128389 A JP 8128389A JP H02260388 A JPH02260388 A JP H02260388A
- Authority
- JP
- Japan
- Prior art keywords
- film
- moisture
- transparent electrode
- resinous film
- water absorption
- 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
- 229920005989 resin Polymers 0.000 claims abstract description 40
- 239000011347 resin Substances 0.000 claims abstract description 40
- 238000010030 laminating Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 13
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000007650 screen-printing Methods 0.000 abstract description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 3
- 229920001577 copolymer Polymers 0.000 abstract description 3
- 239000003960 organic solvent Substances 0.000 abstract description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 abstract 2
- 229920000642 polymer Polymers 0.000 abstract 2
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 abstract 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 abstract 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 description 19
- 230000002745 absorbent Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 229920002292 Nylon 6 Polymers 0.000 description 4
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 239000005083 Zinc sulfide Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000002274 desiccant Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052984 zinc sulfide Inorganic materials 0.000 description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 3
- 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 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 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
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- -1 polyethylene, ethylene Polymers 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- NPERTKSDHFSDLC-UHFFFAOYSA-N ethenol;prop-2-enoic acid Chemical compound OC=C.OC(=O)C=C NPERTKSDHFSDLC-UHFFFAOYSA-N 0.000 description 1
- BLCTWBJQROOONQ-UHFFFAOYSA-N ethenyl prop-2-enoate Chemical compound C=COC(=O)C=C BLCTWBJQROOONQ-UHFFFAOYSA-N 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はＥｌ、 （［４１６Ｃｉｒ（＋ Ｌｕｍ１ｎｅ
ｓｃｅｎｃｅ）素子に関する。更に詳細には耐湿性に優
れたＥＬ発光素子に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to El, ([416Cir(+ Lum1ne
(scence) element. More specifically, the present invention relates to an EL light emitting element with excellent moisture resistance.
近年、表示機器のバックライトとして、広面積に均一な
輝度が得られること、軽量であること等の特徴により、
主として硫化亜鉛を蛍光体として用いるＥＬ発光素子が
使用されている。In recent years, it has been used as a backlight for display equipment due to its characteristics such as providing uniform brightness over a wide area and being lightweight.
EL light emitting devices that use zinc sulfide as a phosphor are mainly used.
しかしながら該蛍光体は湿気に弱く、外部より侵入する
水分により急激に輝度が低下するとの欠点を有する。However, this phosphor has the disadvantage that it is sensitive to moisture and its brightness rapidly decreases due to moisture entering from the outside.
従って、従来使用されているＥＬ発光素子は、水分の侵
入を防止するために素子本体を防湿性に優れたＰＣＴＦ
Ｅ （ポリ三フッ化塩化エチレン）等のフィルムで被覆
保護したり更には防湿フィルムを透過した微量水分の影
響を防止する目的より素子本体と防湿性フィルムとの間
に吸湿層を設けている。Therefore, conventionally used EL light emitting elements are made of PCTF, which has excellent moisture resistance, to prevent moisture from entering the element body.
A moisture-absorbing layer is provided between the element body and the moisture-proof film for the purpose of covering and protecting the device with a film such as E (polytrifluorochloride ethylene) and preventing the influence of trace amounts of moisture that have passed through the moisture-proof film.
吸湿層にはナイロン−６やナイロン−６６などの吸湿性
樹脂フィルムが使用されているが、これらの樹脂は吸湿
能力が小さいことより、蛍光体の吸湿劣化に対して充分
な効果を得ることができない。Hygroscopic resin films such as nylon-6 and nylon-66 are used for the moisture absorption layer, but these resins have a low moisture absorption capacity, so it is difficult to obtain sufficient effects against moisture absorption deterioration of the phosphor. Can not.
それゆえ該吸湿性樹脂フィルムに代わる６のとしてＣａ
ＯやＢａＯなどの化学的乾燥剤を電極上に層状に配設し
て捕水する方法（例えば特開昭５７−１８０８９０号公
報）や微粉化したシリカゲルやモレキュラシーブや高吸
水性樹脂粉末を分散した樹脂フィルムを使用する方法（
例えば特開昭６３−３０１４８４号公報）が検討されて
いるが、化学的乾燥剤は吸湿に際する発熱が、素子本体
に悪影響を及ぼす場合があり、また後の方法は乾燥剤の
分散にムラが生じる場合があり、均一な吸湿効果が得ら
れない等の不都合を有する。Therefore, as an alternative to the hygroscopic resin film, Ca
A method of dispersing water by disposing a chemical desiccant such as O or BaO in a layer on the electrode (for example, Japanese Patent Laid-Open No. 180890/1989), or dispersing finely divided silica gel, molecular sieve, or super absorbent resin powder. How to use resin film (
For example, Japanese Unexamined Patent Publication No. 63-301484) has been studied, but the heat generated by chemical desiccants when absorbing moisture may have an adverse effect on the element body, and the latter method causes uneven dispersion of the desiccant. may occur, resulting in disadvantages such as the inability to obtain a uniform moisture absorption effect.
かかる事情下に鑑み、本発明者等はより優れた耐湿性を
存する８５発光素子を得ることを目的とし、鋭意検討し
た結果、本発明を完成するに至った。In view of these circumstances, the inventors of the present invention aimed to obtain an 85 light-emitting element having superior moisture resistance, and as a result of intensive studies, they have completed the present invention.
すなわち本発明は、背面電極上に絶縁層、発光層および
透明電極を積層し、これを防湿性樹脂フィルムで被覆し
てなる８５発光素子において、透明電極と防湿性樹脂フ
ィルムの間に高吸水性樹脂フィルムを配設したことを特
徴とする８５発光素子を提供するにある。That is, the present invention provides an 85 light-emitting element in which an insulating layer, a light-emitting layer, and a transparent electrode are laminated on a back electrode, and this is covered with a moisture-proof resin film. An object of the present invention is to provide an 85 light emitting element characterized in that a resin film is disposed thereon.
以下、本発明を図面を用いさらに詳細に述べる。Hereinafter, the present invention will be described in more detail using the drawings.
図面に於て、第１図及び第２図は本発明のＥＬ素子の一
実施Ｌｉ様であり、第３図は従来公知のＥＬ素子に関す
る概略断面図である。In the drawings, FIGS. 1 and 2 show one embodiment of the EL device of the present invention, and FIG. 3 is a schematic cross-sectional view of a conventionally known EL device.
図に於て、（１）は背面電極、（２）は絶縁層、（３）
は発光層、（４）は透明電極、（５）は吸湿フィルム（
６）は樹脂外皮フィルム、（７）は高吸水性樹脂フィル
ムおよび（８）は高吸水性樹脂フィルムの保持フィルム
を示す。In the figure, (1) is the back electrode, (2) is the insulating layer, and (3)
is a light-emitting layer, (4) is a transparent electrode, and (5) is a moisture-absorbing film (
6) shows a resin outer film, (7) shows a super absorbent resin film, and (8) shows a holding film for the super absorbent resin film.
第３図に示す如〈従来ＥＬ発光体はアルミニウムのよう
な導電性の良好な金属箔よりなる背面電極（１）上に、
チタン酸バリウムのような高誘電体粉末を有機バインダ
ーに分散させてスラリー状にし、これをスクリーン印刷
等の方法で塗布した絶縁層（２）を設け、絶縁層（２）
上にシアノエチルセルロースのような有機バインダーに
硫化亜鉛を主成分とする蛍光体粉末を分散させたものを
塗布することにより発光層（３）を設け、さらに発光層
（３）上にポリエステルフィルムのような透明フィルム
上にインジウム・錫酸化物（ＩＴＯ）を蒸着もしくはス
パッタリングによって被着したものを積層、或いはＩＴ
Ｏを有機バインダーに分散させたものを塗布して透明電
極（４）を設け、（１）〜（４）よりなる発光素子本体
を形成する。そして、発光層（３）への水分侵入を防止
することを目的として、ナイロン−６やナイロン−６，
６等よりなる吸湿フィルム（５）を発光素子本体上に配
設し、さらにこの上に発光素子本体と吸湿フィルム（５
）を囲撓する如く防湿性を有するＰＣＴＦＥ等のフィル
ムで挾み、少なくとも周囲を熱圧着等で封止してなる樹
脂外皮フィルム（６）より構成されている。As shown in FIG.
An insulating layer (2) is provided by dispersing a high dielectric powder such as barium titanate in an organic binder to form a slurry, and applying this slurry by a method such as screen printing.
A light-emitting layer (3) is provided by applying a dispersion of phosphor powder containing zinc sulfide as a main component in an organic binder such as cyanoethyl cellulose, and then a light-emitting layer (3) such as a polyester film is formed on the light-emitting layer (3). Indium tin oxide (ITO) is deposited on a transparent film by vapor deposition or sputtering, or IT
A transparent electrode (4) is provided by applying O dispersed in an organic binder to form a light emitting element main body consisting of (1) to (4). In order to prevent moisture from entering the light emitting layer (3), nylon-6, nylon-6,
A moisture absorbing film (5) made of 6 etc. is arranged on the light emitting element main body, and the light emitting element body and the moisture absorbing film (5) are placed on top of this.
) is sandwiched between moisture-proof films such as PCTFE, and at least the periphery thereof is sealed by thermocompression bonding or the like.
本発明の８５発光素子は第３図に示すような従来公知の
８５発光素子の吸湿フィルム（５）に代えて高吸水性樹
脂フィルムを配設したものである。The 85 light-emitting element of the present invention has a highly water-absorbing resin film in place of the moisture-absorbing film (5) of the conventionally known 85 light-emitting element as shown in FIG.
このような高吸水性樹脂は通常微粉末、或いは粒状で使
用され、フィルムとしての使用は一般的ではないが、ビ
ニルアルコールとアクリル酸の共重合体、ポリエチレン
オキサイド系重合体或いはアクリル酸ソーダの重合体よ
りなる高吸水性樹脂がフィルムとして使用し得る。Such superabsorbent resins are usually used in the form of fine powder or granules, and are not commonly used as films; A super absorbent resin made of a combination can be used as a film.
これら高吸水性樹脂は第１図（７）に示すように単独で
フィルムを形成し、吸湿フィルム（５）に代え使用する
こともできるし、高吸水性樹脂をトルエン等の有機溶媒
等で溶解させたものをスクリーン印刷等により直接透明
電極上に塗布しフィルムを形成してもよい。また第２図
に示すようにポリエチレン、エチレン・酢酸ビニール共
重合体、ポリプロピレン等の汎用樹脂からなる保持フィ
ルム（８）上に上記方法と同様にして高吸水性樹脂をス
クリーン印刷等で塗布、乾燥し形成した高吸水性樹脂フ
ィルム（７）よりなる高吸水性樹脂フィルムを積層した
汎用樹脂フィルムを吸湿フィルム（５）に代えて使用す
ることも出来る。These super absorbent resins can form a film alone as shown in Figure 1 (7) and can be used in place of the moisture absorbing film (5), or the super absorbent resin can be dissolved in an organic solvent such as toluene. A film may be formed by directly applying the prepared material onto a transparent electrode by screen printing or the like. In addition, as shown in Figure 2, a super absorbent resin is applied by screen printing or the like in the same manner as above on a holding film (8) made of a general-purpose resin such as polyethylene, ethylene/vinyl acetate copolymer, or polypropylene, and then dried. A general-purpose resin film laminated with a super absorbent resin film (7) formed using the same method can also be used in place of the moisture absorbing film (5).
高吸水性樹脂フィルム（７）の厚みは特に制限されるも
のではないが薄すぎるとピンホールや破れなどの欠陥が
生じて充分な吸湿効果が期待できず、また強度も弱く作
業性の点からも好ましくなく、他方あまり厚い場合には
ＥＬ発光素子の特徴である可撓性が低下する等の不都合
が生じるので、通常約３μｍ〜約２００μｍ、好ましく
は約１０μｍ〜約１５０μｍの範囲で使用される。The thickness of the super absorbent resin film (7) is not particularly limited, but if it is too thin, defects such as pinholes and tears will occur, making it impossible to expect a sufficient moisture absorption effect, and the strength will be weak, resulting in poor workability. On the other hand, if it is too thick, problems such as a decrease in flexibility, which is a characteristic of EL light emitting elements, will occur. .
該高吸水性樹脂フィルムは弁中醤耕女枦卿°
透明電極（４）の上面のみに配設してもよいし、発光素
子を挟むように透明電極（４）と背面電極（１）の両面
に配設してもよい。The super absorbent resin film is made by
It may be arranged only on the upper surface of the transparent electrode (4), or it may be arranged on both sides of the transparent electrode (4) and the back electrode (1) so as to sandwich the light emitting element.
以上詳述した本発明のＥＬ発光素子は従来のナイロン−
６、或いはナイロン−６，６等の吸湿フィルム、さらに
はシリカゲルや高吸水性樹脂粉末を分散させてなる吸湿
フィルムを用いたＥＬ発光素子に比較し吸湿能に優れる
とともに安定した吸湿性を有するため、室内で使用され
るワードプロセンサーやパーソナルコンピュータ等のバ
ックライトのみならず、自動車用パネルのバックライト
、屋外表示灯等の過酷な環境下で使用される用途にも適
用可能とならしめるもので、その工業的価値は頗る大な
るものである。The EL light emitting device of the present invention detailed above is a conventional nylon light emitting device.
6 or nylon-6,6, or EL light-emitting elements using moisture-absorbing films made by dispersing silica gel or super-absorbent resin powder, it has excellent moisture absorption ability and stable moisture absorption. This makes it possible to apply it not only to the backlights of word processing sensors and personal computers used indoors, but also to applications used in harsh environments such as backlights of automobile panels and outdoor indicator lights. , its industrial value is enormous.
以下実施例により本発明をさらに詳細に説明する。 The present invention will be explained in more detail with reference to Examples below.
実施例１
第２図に示すように、７０μｍのアルミニウム箔よりな
る背面電極、１５μｍの厚さを有するチタン酸バリウム
よりなる絶縁層、平均粒径２５μｍの硫化亜鉛系蛍光体
１０重量％を分散させたシアノエチルセルロースを塗布
、乾燥してなる厚み５０μｍの発光層、厚み５μｍのＩ
ＴＯよりなる透明電極により発光素子本体を形成した後
、厚み５０μｍのエチレン−酢酸ビニル系樹脂フィルム
上にアクリル酸ビニルアルコール共重合からなる高吸水
性樹脂；モ＃益（スミカゲル［有］住友化学工業０１）
製）をスクリーン印刷法で塗布、乾燥して得た平均厚み
２０μｍの高吸水性樹脂フィルム（保持フィルム上に高
吸水性樹脂フィルムを積層したもの）を上記素子を包む
ごとく背面電極と透明電極上に配し加熱ローラにより熱
圧着し、さらにこれを囲撓するように厚さ２００μｍの
ポリ三フフ化塩化エチレンよりなるフィルムで挟み、上
部より加熱ローラで熱圧着してＥＬ発光素子を作成した
。Example 1 As shown in Figure 2, a back electrode made of a 70 μm aluminum foil, an insulating layer made of barium titanate having a thickness of 15 μm, and 10% by weight of a zinc sulfide-based phosphor with an average particle size of 25 μm were dispersed. A luminescent layer with a thickness of 50 μm formed by coating and drying cyanoethyl cellulose, and an I layer with a thickness of 5 μm.
After forming the light-emitting element body with a transparent electrode made of TO, a super water-absorbing resin made of vinyl acrylate alcohol copolymerization was applied onto a 50 μm thick ethylene-vinyl acetate resin film; 01)
A super absorbent resin film (super absorbent resin film laminated on a holding film) with an average thickness of 20 μm obtained by applying and drying a super absorbent resin film (manufactured by Mimaki Co., Ltd.) using a screen printing method is placed on the back electrode and the transparent electrode so as to wrap around the above element. The EL device was placed on the substrate and heat-pressed with a heating roller, then sandwiched between a 200-μm-thick film of polytrifluorochloride ethylene so as to surround it, and heat-pressed from above with a heating roller to produce an EL light-emitting device.
このようにして得たＥＬ発光素子を６５℃＝９５％ＲＨ
の高温高湿下で１００時間吸湿後、２３℃、４０〜６０
％ＲＨ下で１）５■４００Ｈｚの駆動条件で点灯させ、
点灯開始時と５０時間後の輝度を測定した。The EL light emitting device thus obtained was heated at 65°C = 95%RH.
After absorbing moisture for 100 hours under high temperature and high humidity, 23℃, 40-60
%RH under 1) 5 ■ 400Hz driving condition,
Luminance was measured at the start of lighting and after 50 hours.
その結果、点灯開始時の輝度に対する５０時間後の輝度
保持率は７０％であった。As a result, the brightness retention rate after 50 hours with respect to the brightness at the start of lighting was 70%.
比較例１
実施例１の方法において高吸水性樹脂フィルムを積層し
たエチレン−酢酸ビニル系樹脂フィルムに代えて厚み１
００μｍのナイロン６（ダイセル化学工業■製）を用い
た他は実施例１と同様にして作成したＥＬ発光素子の耐
湿性を実施例１と同じ条件で測定したところ、点灯開始
時の輝度に対する５０時間後の輝度保持率は４０％であ
った。Comparative Example 1 In place of the ethylene-vinyl acetate resin film laminated with a super absorbent resin film in the method of Example 1, a thickness of 1
The moisture resistance of an EL light emitting device prepared in the same manner as in Example 1 except that 00 μm nylon 6 (manufactured by Daicel Chemical Industries, Ltd.) was used was measured under the same conditions as in Example 1. The brightness retention rate after hours was 40%.
比較例２
実施例１の方法において高吸水性樹脂フィルムを積層し
たエチレン−酢酸ビニル系樹脂フィルムに代えて平均粒
径１０μｍのアクリル酸−ビニルアルコール共重合体よ
りなる高吸水性樹脂（スミカゲル０住友化学工業■製）
１８重量％を分散させた厚さ１２０μｍのエチレン−酢
酸ビニル系樹脂フィルムを用いた他は実施例１と同様に
して作成したＥＬ発光素子の耐湿性を実施例１と同じ条
件で測定したところ、点灯開始時の輝度に対する５０時
間後の輝度保持率は５０％であった。Comparative Example 2 In place of the ethylene-vinyl acetate resin film laminated with a super-absorbent resin film in the method of Example 1, a super-absorbent resin made of an acrylic acid-vinyl alcohol copolymer with an average particle size of 10 μm (Sumikagel 0 Sumitomo) (manufactured by Kagaku Kogyo)
The moisture resistance of an EL light emitting device prepared in the same manner as in Example 1 except that a 120 μm thick ethylene-vinyl acetate resin film having 18% by weight dispersed therein was used was measured under the same conditions as in Example 1. The brightness retention rate after 50 hours with respect to the brightness at the start of lighting was 50%.
第１図及び第２図は本発明のＥＬ発光素子の−実施Ｌｉ
様、第３図は従来公知のＥＬ素子を示す概略断面図であ
り、図中、１）１は背面電極、（２）は絶縁層、（３）
は発光層、（４）は透明電極、（５）は吸湿フィルム、
（６）は樹脂外皮フィルム、（７）は高吸水性樹脂フィ
ルムおよび（８）は高吸水性樹脂フィルムの保持フィル
ムを示す。FIG. 1 and FIG. 2 show the implementation of the EL light emitting device of the present invention.
3 is a schematic cross-sectional view showing a conventionally known EL element, in which 1) 1 is a back electrode, (2) is an insulating layer, and (3) is a back electrode.
is a light emitting layer, (4) is a transparent electrode, (5) is a moisture absorption film,
(6) shows a resin outer film, (7) shows a super absorbent resin film, and (8) shows a holding film for the super absorbent resin film.
Claims (1)
を積層し、これを防湿性樹脂フイルムで被覆してなるＥ
Ｌ発光素子において、透明電極と防湿性樹脂フイルムの
間に高吸水性樹脂フイルムを配設したことを特徴とする
ＥＬ発光素子。(1) E made by laminating an insulating layer, a light-emitting layer and a transparent electrode on a back electrode, and covering this with a moisture-proof resin film.
1. An EL light-emitting element characterized in that a highly water-absorbing resin film is disposed between a transparent electrode and a moisture-proof resin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1081283A JPH02260388A (en) | 1989-03-30 | 1989-03-30 | El luminous device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1081283A JPH02260388A (en) | 1989-03-30 | 1989-03-30 | El luminous device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02260388A true JPH02260388A (en) | 1990-10-23 |
Family
ID=13742047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1081283A Pending JPH02260388A (en) | 1989-03-30 | 1989-03-30 | El luminous device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02260388A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02141994U (en) * | 1989-05-02 | 1990-11-30 | ||
| US5557295A (en) * | 1991-11-28 | 1996-09-17 | Nippon Seiki K.K. | Display panel |
| US6583557B2 (en) | 2000-04-26 | 2003-06-24 | Canon Kabushiki Kaisha | Organic luminescent element |
-
1989
- 1989-03-30 JP JP1081283A patent/JPH02260388A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02141994U (en) * | 1989-05-02 | 1990-11-30 | ||
| US5557295A (en) * | 1991-11-28 | 1996-09-17 | Nippon Seiki K.K. | Display panel |
| US6583557B2 (en) | 2000-04-26 | 2003-06-24 | Canon Kabushiki Kaisha | Organic luminescent element |
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