JPH04115493A - Dispersion type el panel - Google Patents
Dispersion type el panelInfo
- Publication number
- JPH04115493A JPH04115493A JP2230710A JP23071090A JPH04115493A JP H04115493 A JPH04115493 A JP H04115493A JP 2230710 A JP2230710 A JP 2230710A JP 23071090 A JP23071090 A JP 23071090A JP H04115493 A JPH04115493 A JP H04115493A
- Authority
- JP
- Japan
- Prior art keywords
- film
- panel
- emitting layer
- light emitting
- transparent electrode
- 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
- 239000006185 dispersion Substances 0.000 title claims abstract description 13
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims abstract description 13
- 239000011112 polyethylene naphthalate Substances 0.000 claims abstract description 13
- -1 polyethylene naphthalate Polymers 0.000 claims abstract description 9
- 229920006254 polymer film Polymers 0.000 claims description 10
- 230000035699 permeability Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000002120 nanofilm Substances 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 28
- 239000010408 film Substances 0.000 description 27
- 239000010409 thin film Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052984 zinc sulfide Inorganic materials 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 125000001731 2-cyanoethyl group Chemical group [H]C([H])(*)C([H])([H])C#N 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 239000005083 Zinc sulfide Substances 0.000 description 2
- 239000012790 adhesive layer Substances 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
- 239000011230 binding agent Substances 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920006290 polyethylene naphthalate film Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004373 Pullulan Substances 0.000 description 1
- 229920001218 Pullulan Polymers 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- RXOHFPCZGPKIRD-UHFFFAOYSA-N naphthalene-2,6-dicarboxylic acid Chemical compound C1=C(C(O)=O)C=CC2=CC(C(=O)O)=CC=C21 RXOHFPCZGPKIRD-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019423 pullulan Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は液晶表示装置のバックライト、照明用光源等に
用いられる分散型ＥＬパネルに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a distributed EL panel used as a backlight of a liquid crystal display device, a light source for illumination, etc.
（従来の技術）
従来、第３図に示すように、分散型ＥＬパネルはアルミ
箔等からなる背面電極■上に反射絶縁層■および発光層
■を順次積層し、その上に透明電極に）を積層した後、
ナイロン等からなる捕水フィルム■および防湿フィルム
■で封止した構造となっている。背面電極■および透明
電極（４）からり−ト■が導出されている。背面電極■
は表面を陽極酸化したアルミニウム箔等が用いられる。(Prior art) Conventionally, as shown in Fig. 3, a dispersion type EL panel has a reflective insulating layer (■) and a light emitting layer (■) successively laminated on a back electrode (■) made of aluminum foil, etc., and a transparent electrode () on top of that. After laminating the
The structure is sealed with a water-capturing film (■) and a moisture-proof film (■) made of nylon or the like. A back electrode (2) and a transparent electrode (4) are led out. Back electrode■
An aluminum foil or the like whose surface is anodized is used.
反射絶縁層■および発光層■は、ジメチルホルムアミド
等の有機溶剤にシアノエチル化プルランやシアノエチル
化ポリビニルアルコール等の有機誘電体を溶解させたバ
インダー中に、チタン酸バリウム等の高誘電率の白色粉
末および硫化亜鉛系の蛍光体を分散させて形成した反射
絶縁層ペーストおよび発光層ペーストを、ドクターロー
ル法等で順次塗布・乾燥して積層している。透明電極に
）はポリエステル等の高分子フィルム基材（４ａ）上に
酸化スズ酸化インジウム等からなる導電性薄膜（４ｂ）
をスパッタリング法等により形成したものが用いられる
。防湿フィルム０は透湿性の小さい三弗化塩化エチレン
が広く一般に使用されている。The reflective insulating layer (■) and the light emitting layer (■) are made of a white powder with a high dielectric constant such as barium titanate and A reflective insulating layer paste and a light emitting layer paste formed by dispersing a zinc sulfide-based phosphor are successively applied and dried using a doctor roll method or the like, and then laminated. The transparent electrode) is a conductive thin film (4b) made of tin oxide, indium oxide, etc. on a polymer film base material (4a) such as polyester.
A material formed by a sputtering method or the like is used. As the moisture-proof film 0, trifluorochloroethylene, which has low moisture permeability, is widely used.
しかしながら、上記構造を有する分散型ＥＬバネルの寿
命を表す輝度半減期は十分に長いものであるとは言えな
い。例えば５分散型ＥＬパネルを液晶表示装置のバック
ライトとして使用する場合、分散型ＥＬパネルの輝度半
減期は一般に１０００〜３０００時間である。分散型Ｅ
Ｌパネルが輝度減衰を起こすのは外部から浸透した水分
が発光層中の蛍光体を劣化させるためであると考えられ
る。すなわち、蛍光体の主成分である硫化亜鉛が、下記
■式に示すように分解する結果、発光しなくなると考え
られる。However, it cannot be said that the luminance half-life, which represents the lifetime of the distributed EL panel having the above structure, is sufficiently long. For example, when a 5-dispersion type EL panel is used as a backlight of a liquid crystal display device, the luminance half-life of the dispersion type EL panel is generally 1000 to 3000 hours. Decentralized E
It is thought that the reason why the L panel causes brightness attenuation is because moisture that has penetrated from the outside deteriorates the phosphor in the light emitting layer. That is, it is thought that zinc sulfide, which is the main component of the phosphor, decomposes as shown in the following equation (2), and as a result, it ceases to emit light.
ＺｎＳ＋２Ｈ，Ｏ−＋ Ｚｎ＋Ｓ０２＋２Ｈ２−■そこ
で、外部水分の発光層への浸透を抑制するために防湿フ
ィルムには極めて透湿性の小さい三弗化塩化エチレンが
使用され、さらに、この防湿フィルムをも透過した水分
を内側の捕水フィルムで吸収して、発光層に到達する水
分量を最小限にする試みが行われてきたが、十分な効果
が得られない。捕水フィルムに吸着されずに透過した水
分は、透明電極の基材である高分子フィルムを透過して
発光層に到達すると考えられるが、透明電極の基材であ
る高分子フィルムは、一般に、寸法安定性、光透過率や
耐熱性の点で比較的良好な特性を有するポリエチレンテ
レフタレート（以下ＰＥＴと呼ぶ）が広く使用されてい
るのが現状である。ZnS+2H,O-+ Zn+S02+2H2-■Therefore, trifluorochloride ethylene, which has extremely low moisture permeability, was used in the moisture-proof film to suppress the penetration of external moisture into the luminescent layer. Attempts have been made to minimize the amount of moisture reaching the light-emitting layer by absorbing moisture with an inner water-absorbing film, but these efforts have not been sufficiently effective. It is thought that the water that permeates without being adsorbed by the water-catching film reaches the light-emitting layer by passing through the polymer film that is the base material of the transparent electrode, but the polymer film that is the base material of the transparent electrode generally At present, polyethylene terephthalate (hereinafter referred to as PET), which has relatively good properties in terms of dimensional stability, light transmittance, and heat resistance, is widely used.
ＰＥＴフィルムの水分透過率を低減する試みはいくらか
行われているが、実用化に至っていない。Although some attempts have been made to reduce the moisture permeability of PET films, they have not been put to practical use.
第１に、ＰＥＴフィルム表面に金属酸化物あるいは金属
の薄膜を形成する等の加工を施せず水分透過率は低減さ
れるが、この方法では透明電極の光透過率まで大きく減
少するため、ＥＬ全発光取り出すという透明電極の機能
が損なわれてしまう。First, the moisture transmittance is reduced because it is not possible to perform processing such as forming a metal oxide or metal thin film on the PET film surface, but this method greatly reduces the light transmittance of the transparent electrode, so the EL total The function of the transparent electrode to extract light emission is impaired.
第２の方法は、透明電極をガラス等で形成する方法であ
るが、ガラスを用いた分散型ＥＬパネルは製造上の加工
性に劣る他、可どう性がなく、分散型ＥＬパネルの特長
を著しく損なうものである。The second method is to form transparent electrodes with glass or the like, but dispersion-type EL panels using glass have poor processability and lack of flexibility, and the advantages of dispersion-type EL panels cannot be achieved. It is extremely damaging.
このように、分散型ＥＬパネルの発光特性や特長を低減
することなく透明電極の水分透過率を抑制し、長寿命の
分散型ＥＬパネルを製造するのは困難であるのが現状で
ある。そのため、寸法安定性や光透過率や耐熱性を低下
させることなく水分透過率を抑制した高分子フィルムを
用いて形成した透明電極の開発が望まれている。As described above, it is currently difficult to suppress the moisture permeability of the transparent electrode without reducing the light emitting characteristics and features of the dispersion type EL panel, and to manufacture a long-life dispersion type EL panel. Therefore, it is desired to develop a transparent electrode formed using a polymer film that suppresses moisture transmittance without reducing dimensional stability, light transmittance, or heat resistance.
（発明が解決しようとする課題）
以上説明したように、背面電極上に少なくとも反射絶縁
層と発光層を積層し、発光層上に透明電極を形成した構
造であり、かつ透明電極はＰＥＴフィルム上に導電性膜
を形成した構造を有する分散型ＥＬパネルにおいては、
透明電極の水分透過率が大きいという問題があった。(Problems to be Solved by the Invention) As explained above, the structure is such that at least a reflective insulating layer and a light emitting layer are laminated on the back electrode, and a transparent electrode is formed on the light emitting layer, and the transparent electrode is formed on a PET film. In a distributed EL panel having a structure in which a conductive film is formed on the
There was a problem in that the transparent electrode had a high moisture permeability.
本発明はこの透明電極の透湿性を著しく低下させ、発光
層の吸湿による劣化を抑制した長寿命の分散型ＥＬパネ
ルを提供することを目的とする。An object of the present invention is to provide a long-life dispersed EL panel in which the moisture permeability of the transparent electrode is significantly reduced and deterioration of the light emitting layer due to moisture absorption is suppressed.
（課題を解決するための手段）
本発明は、背面電極上に少なくとも反射絶縁層と発光層
を積層し１発光層上に透明電極を形成した構造であり、
かつ透明電極は高分子フィルム上に導電性膜を形成した
構造を有する分散型ＥＬパネルにおいて、高分子フィル
ムはポリエチレンナフタレートからなることを特徴とす
る分散型ＥＬパネルである。(Means for Solving the Problems) The present invention has a structure in which at least a reflective insulating layer and a light emitting layer are laminated on a back electrode, and a transparent electrode is formed on one light emitting layer,
The present invention is a dispersed EL panel having a structure in which the transparent electrode is a conductive film formed on a polymer film, and the polymer film is made of polyethylene naphthalate.
ポリエチレンナフタレ−１〜フイルムの厚さは特に限定
しないが、一般に、厚さ５０μｓ〜１００μｓのフィル
ムが分散型ＥＬパネルには使用されており、製造上の取
扱いの難易や作業性の点からも５０μｓ〜１００ｐの厚
さのフィルムを使用することが望ましい。The thickness of the polyethylene naphthalene film is not particularly limited, but in general, films with a thickness of 50 μs to 100 μs are used for dispersion type EL panels, and from the viewpoint of ease of handling during manufacturing and workability. It is desirable to use a film with a thickness of 50 μs to 100 p.
（作 用）
本発明の分散型ＥＬパネルにおいては、透明電極の基材
となる高分子フィルムはポリエチレンナフタレートフィ
ルムよりなるので、透明電極の水分透過率が著しく抑制
され、その結果、発光層の吸湿による劣化が抑制された
長寿命の分散型ＥＬパネルを得ることが出来る。(Function) In the dispersion type EL panel of the present invention, since the polymer film serving as the base material of the transparent electrode is made of a polyethylene naphthalate film, the water permeability of the transparent electrode is significantly suppressed, and as a result, the light-emitting layer is It is possible to obtain a long-life distributed EL panel in which deterioration due to moisture absorption is suppressed.
（実施例）
以下１本発明の実施例について図面を参照して説明する
。(Example) An example of the present invention will be described below with reference to the drawings.
まず、ポリエチレンナフタレート（以下ＰＥＮと表す）
フィルムを使用した透明電極の製作方法について説明す
る。ＰＥＮは第１図に示す構造式で表されるように、ナ
フタレン２，６ジカルボン酸とエチレングリコールより
なるポリエステルである。このＰＥＮ原材料を加熱溶融
しながら回転する冷却ドラム上に押し出し、冷却固化し
た後加熱ローラにより縦横方向に二軸延伸して厚さ７５
μｓのＰＥＮフィルムを得た。このＰＥＮフィルム上に
スパッタリング法により厚さ１０００人の酸化インジウ
ム酸化スズの導電性薄膜を形成し、さらにこの導電性薄
膜上に銀ペーストからなる補助電極をスクリーン印刷法
により塗布後温度１５０℃で焼成して熱硬化させた。そ
してこの長尺なロール状の透明電極フィルムを分散型Ｅ
Ｌパネルの寸法に裁断して、透明電極１を得た。また、
ＰＥＮフィルム上に導電性薄膜を形成した後、導電性薄
膜上にシアノエチルポリビニルアルコールをアセトニト
リルに溶解させた有機物を塗布乾燥し、同様に補助電極
を印刷焼成して形成した透明電極２を作製した。First, polyethylene naphthalate (hereinafter referred to as PEN)
A method for manufacturing a transparent electrode using a film will be explained. PEN, as represented by the structural formula shown in FIG. 1, is a polyester consisting of naphthalene 2,6 dicarboxylic acid and ethylene glycol. This PEN raw material is extruded onto a rotating cooling drum while being heated and melted, and after being cooled and solidified, it is biaxially stretched in the vertical and horizontal directions using heating rollers to a thickness of 75 mm.
A μs PEN film was obtained. A conductive thin film of indium tin oxide with a thickness of 1000 μm was formed on this PEN film by a sputtering method, and an auxiliary electrode made of silver paste was applied onto this conductive thin film by a screen printing method, followed by baking at a temperature of 150°C. and heat cured. Then, this long roll-shaped transparent electrode film was
Transparent electrode 1 was obtained by cutting to the size of L panel. Also,
After forming a conductive thin film on the PEN film, an organic substance prepared by dissolving cyanoethyl polyvinyl alcohol in acetonitrile was applied and dried on the conductive thin film, and an auxiliary electrode was printed and fired in the same manner to produce a transparent electrode 2.
続いて、この透明電極を使用した分散型ＥＬパネルの製
造方法を説明する。Next, a method for manufacturing a distributed EL panel using this transparent electrode will be explained.
表面にアルマイト処理を施した厚さ１００ｔｎｎのアル
ミニウム箔からなる背面電極上に、Ｎ、Ｎ−ジメチルホ
ルムアミドにシアノエチルプルランとシアノエチルポバ
ールを溶解させたバインダ中にチタン酸バリウム粉末を
分散させた反射絶縁層ペーストをスクリーン印刷法によ
り塗布した後１２０℃で乾燥して反射絶縁層を得た。続
いて反射絶縁層上に、上記バインダ中にＺｎＳ ： Ｃ
ｕ、 ＣＱ等の蛍光体を分散させた発光層ペーストをス
クリーン印刷法により塗布した後１２０℃で乾燥して発
光層を形成した。この印刷基板のアルミニウム基板にリ
ン青銅からなるリードを取り付けたものと、上記のＰＥ
Ｎフィルムを使用した透明電極１あるいは透明電極２の
補助電極にリン青銅からなるリードを取り付けたものと
を、発光層と導電性薄膜が内側になるように重ねた後、
これをラミネータを用いて加熱圧着し透明電極１あるい
は透明電極２と印刷基板とを貼り合わせて分散型ＥＬ＊
子を作製した。A reflective insulating layer made of barium titanate powder dispersed in a binder made of cyanoethyl pullulan and cyanoethylpoval dissolved in N,N-dimethylformamide is placed on a back electrode made of aluminum foil with a thickness of 100 tnn which has been anodized on the surface. The paste was applied by screen printing and then dried at 120°C to obtain a reflective insulating layer. Subsequently, on the reflective insulating layer, ZnS:C was added in the binder.
A light-emitting layer paste in which phosphors such as U, CQ, etc. were dispersed was applied by screen printing and then dried at 120° C. to form a light-emitting layer. This printed circuit board with leads made of phosphor bronze attached to an aluminum substrate, and the above-mentioned PE
Transparent electrode 1 using N film or transparent electrode 2 with a lead made of phosphor bronze attached to the auxiliary electrode are stacked so that the light emitting layer and the conductive thin film are on the inside,
This is heated and pressed using a laminator, and the transparent electrode 1 or transparent electrode 2 and the printed substrate are bonded together to form a dispersed EL*
A child was created.
更に、ナイロン６フィルムの片側に接着層を形成した捕
水フィルムを分散型ＥＬ素子の上下から接着層が内側と
なるように重ねて、ラミネータを使用して分散型ＥＬ素
子に貼り付けた。その後、捕水フィルムの外側から、三
弗化塩化エチレンフィルムの片側に熱可塑性接着剤を塗
布した防湿フィルムを、ラミネータを用いて貼り合わせ
て分散型ＥＬパネルを作製した。透明電極１を使用した
実施例を実施例１．また透明電極２を使用した実施例を
実施例２とする。Furthermore, a water-trapping film with an adhesive layer formed on one side of the nylon 6 film was stacked on top and bottom of the dispersed EL element so that the adhesive layer was on the inside, and was attached to the dispersed EL element using a laminator. Thereafter, a moisture-proof film coated with a thermoplastic adhesive was attached to one side of the trifluorochloroethylene film from the outside of the water-absorbing film using a laminator, thereby producing a dispersed EL panel. Example 1 is an example using the transparent electrode 1. Further, an example using the transparent electrode 2 will be referred to as Example 2.
比較例として厚さ７５μｓのＰＥＴフィルム上に厚さ１
０００人の酸化インジウム酸化スズ薄膜を形成した透明
電極を用いて上記と同様の方法で分散型ＥＬパネルを作
製した。As a comparative example, a film with a thickness of 1
A dispersed EL panel was fabricated in the same manner as above using a transparent electrode on which a thin film of indium tin oxide of 1,000 yen was formed.
上記の実施例１、実施例２および比較例の分散型ＥＬパ
ネルの輝度特性の減衰特性を測定して比較した。第２図
は実施例１、実施例２および比較例の分散型ＥＬパネル
に１００Ｖ４００Ｈｚの交流電界を印加して、２５℃６
０％の常温常湿環境下で点灯させて輝度半減期を測定し
た結果をグラフで表したものである。第２図より従来の
分散型ＥＬパネルは輝度半減期が３０００時間であるの
に対して、実施例１および実施例２の分散型ＥＬパネル
は輝度半減期はそれぞれ約４０００時間であり、本発明
による分散型ＥＬパネルは寿命特性が大きく改善されて
いることがわかる。この事は透明電極の基材としてポリ
エチレンナフタレートを使用した分散型ＥＬパネルにお
いては、透明電極の透湿性が抑制された結果、発光層に
到達する外部水分の浸透量が著しく減少し、発光層の劣
化が抑えられたことを示している。The attenuation characteristics of the brightness characteristics of the dispersion type EL panels of Example 1, Example 2, and Comparative Example described above were measured and compared. Figure 2 shows an AC electric field of 100 V and 400 Hz applied to the distributed EL panels of Example 1, Example 2, and Comparative Example at 25°C and 6°C.
This is a graph showing the results of measuring the luminance half-life when the light was turned on in a normal temperature and humidity environment of 0%. As shown in FIG. 2, the conventional distributed EL panel has a luminance half-life of 3000 hours, whereas the distributed EL panels of Example 1 and Example 2 each have a luminance half-life of approximately 4000 hours, and the present invention It can be seen that the dispersion type EL panel according to the present invention has greatly improved life characteristics. This means that in dispersed EL panels that use polyethylene naphthalate as the base material for the transparent electrodes, the moisture permeability of the transparent electrodes is suppressed, resulting in a marked decrease in the amount of external moisture that reaches the light-emitting layer. This shows that the deterioration of was suppressed.
以上説明したように、本発明の分散型ＥＬパネルにおい
ては、透明電極フィルムの基材としてポリエチレンナフ
タレートフィルムを使用しているので、透明導電フィル
ムの透湿性を抑制し発光層の外部水分による劣化を抑え
た長寿命の分散型ＥＬパネルを得ることが出来る。As explained above, in the dispersion type EL panel of the present invention, polyethylene naphthalate film is used as the base material of the transparent electrode film, so the moisture permeability of the transparent conductive film is suppressed and the luminescent layer deteriorates due to external moisture. It is possible to obtain a long-life distributed EL panel with suppressed energy consumption.
第１図はポリエチレンナフタレートの構造式を示す図、
第２図は本発明による分散型ＥＬパネルの輝度特性と点
灯時間の関係をグラフで示す図、第３図は分散型ＥＬパ
ネルの縦断面図である。
１ 背面電極 ２・・・反射絶縁層３・・・発光
層 ４・・透明電極４ａ・・・導電性薄膜
４ｂ・高分子フィルム５・・・捕水フィルム ６・
・外皮フィルム７・・・リート
代理人 弁理士 則 近 憲 佑
同
竹
花
喜久男
［Ｔｇ＋ＩｔｌｌFigure 1 is a diagram showing the structural formula of polyethylene naphthalate.
FIG. 2 is a graph showing the relationship between luminance characteristics and lighting time of a distributed EL panel according to the present invention, and FIG. 3 is a longitudinal cross-sectional view of the distributed EL panel. 1 Back electrode 2... Reflective insulating layer 3... Light emitting layer 4... Transparent electrode 4a... Conductive thin film
4b・Polymer film 5...Water capture film 6・
・Outer film 7... REIT agent Patent attorney Nori Chika Yudo Kikuo Takehana [Tg+Itll
Claims (1)
前記発光層上に透明電極を形成した構造を有し、かつ前
記透明電極は高分子フィルム上に少なくとも導電性膜を
具備する分散型ＥＬパネルにおいて、 前記高分子フィルムはポリエチレンナフタレートからな
ることを特徴とする分散型ＥＬパネル。[Claims] At least a reflective insulating layer and a light emitting layer are laminated on the back electrode,
In the dispersion type EL panel having a structure in which a transparent electrode is formed on the light emitting layer, and the transparent electrode is provided with at least a conductive film on a polymer film, the polymer film is made of polyethylene naphthalate. Features a distributed EL panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2230710A JPH04115493A (en) | 1990-09-03 | 1990-09-03 | Dispersion type el panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2230710A JPH04115493A (en) | 1990-09-03 | 1990-09-03 | Dispersion type el panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04115493A true JPH04115493A (en) | 1992-04-16 |
Family
ID=16912097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2230710A Pending JPH04115493A (en) | 1990-09-03 | 1990-09-03 | Dispersion type el panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04115493A (en) |
-
1990
- 1990-09-03 JP JP2230710A patent/JPH04115493A/en active Pending
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