JPH054714Y2 - - Google Patents
Info
- Publication number
- JPH054714Y2 JPH054714Y2 JP1988023664U JP2366488U JPH054714Y2 JP H054714 Y2 JPH054714 Y2 JP H054714Y2 JP 1988023664 U JP1988023664 U JP 1988023664U JP 2366488 U JP2366488 U JP 2366488U JP H054714 Y2 JPH054714 Y2 JP H054714Y2
- Authority
- JP
- Japan
- Prior art keywords
- lead
- film
- seal
- leads
- electroluminescent
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims description 15
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000012461 cellulose 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
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
産業上の利用分野
本考案は、電界発光灯に関し、特に有機分散形
電界発光灯における外皮フイルムで封止されるリ
ードのシールパス部の封止性改良に関する。
従来の技術
従来、有機分散形電界発光灯は第５図及び第６
図に示すようにアルミ箔などよりなる背面電極１
上に絶縁物（例えばBaTiO3のような高誘電体粉
末）および蛍光体（例えばZnS：Cu系蛍光体）
を有機バインダー中にそれぞれ分散したものを順
次塗布して、絶縁層２、発光層３を形成し、その
上に、集電帯４を印刷した透明導電フイルム等か
らなる透明電極５を貼合わせ、上下より吸水性フ
イルム（例えばナイロン−６）６，６で覆い形成
された電界発光素子７を、更に上下から防湿性の
外皮フイルム（例えば、３弗化塩化エチレン）
８，８で密閉封止した構造を有する。尚、背面電
極１と透明電極５からは、リード９，９がそれぞ
れ電気的に接続され外部に導出されている。
考案が解決しようとする課題
上記構造の電界発光灯について、第５図に外皮
フイルムで封止されるリードのシールパス部の平
面図、第６図に第５図の要部拡大断面図を示す。
ここで、リードのシールパス部１０と、電界発光
素子７が外皮フイルム８，８で挟まれた部分とを
単一ロールで熱圧着した場合、リード９，９電界
発光素子７に比べて厚さが薄いため第６図に示す
ようにリード９，９はかなり屈曲した状態で封止
されてしまう。それ故、外皮フイルム８，８のリ
ード封止部８ａ，８ａにおいて、上記屈曲したリ
ードにより外皮フイルムに内部より封止を剥がす
方向にストレスがかかり、封止性が悪くなる。ま
た、単一の表面が平滑なロールで熱圧着されてい
るため厚さの薄いリード９，９のみを挟んだリー
ドのシールパス部１０におけるロールの加圧力が
低くなり、封止性が悪くなつてしまう。このよう
な構造上の問題点から、封止時において、リード
のシールパス部１０には第５図に示すように、気
泡ａが入り込みやすく、封止性が悪くなり、その
部分からの湿気侵入が寿命低下の一因となつてい
る。
現在、その対策として、気泡ａが入り込んだリ
ードのシールパス部１０を再度熱圧着し、気泡ａ
を追い出すか、リードのシールパス部１０をリー
ド方向に長くするかの２つの方法が採られている
が、前者の方法では気泡ａの有り無しの検査を
し、その後再熱着するため工数がかかり、また、
後者の方法では、シールパスが長くなるため電界
発光灯の有効発光面積が狭くなつてしまう。
課題を解決するための手段
上記課題を解決するため本考案では外皮フイル
ムで電界発光素子を封止する際、外皮フイルムで
封止されるリードのシールパス部に、背面電極、
絶縁層、発光層からなる積層体と略同一厚さの熱
融着性のフツ素樹脂フイルム（以後PFAフイル
ムと略称する）を上下のリードに挟まれるように
介在させて、電界発光素子とリードのシールパス
部との厚さの差をなくし、単一のロールで、且
つ、同一の加圧力で封止して、同時にリードのシ
ールパス部の気泡を除去したことを特徴としてい
る。
作 用
電界発光素子とリードのシールパス部の厚さの
差がないため、封止時においてリードのシールパ
ス部に気泡が入り込むことがなく、かつ、用いる
PFAフイルムはきわめて吸水率が低いので、電
界発光灯の耐湿信頼性が向上する。
実施例
本考案の実施例について説明する。
第１図は本考案による電界発光灯の拡大断面図
である。その構造は、アルミ箔１よりなる背面電
極上に絶縁物（例えばBaTiO3のような高誘電体
粉末）および蛍光体（例えばZnS：Cu系の蛍光
体）を有機バインダー（例えばセルロース系樹
脂）中にそれぞれ分散させたものを順次塗布して
絶縁層２、発光層３を形成し、その上に集電帯４
を印刷した透明導電フイルム等からなる透明電極
５を貼り合わせ、上下より吸水性フイルム（例え
ばナイロン−６）６，６で覆い形成された電界発
光素子７を更にその上下から防湿性の外皮フイル
ム（例えば弗素系フイルム）８，８によつて挟
み、後述の熱ロールプレスによつて外皮フイルム
８，８の周辺重合部を溶着させ密閉封止したもの
であつて、更に、上記した内部の両電極から引き
出した２本のリード９，９の間すなわち、リード
のシールパス部１０に、アルミ箔１、絶縁層２、
発光層３からなる積層体と同じ厚さのPFAフイ
ルム１１を介在している。
ここで、PFAフイルム１１について説明する。
PFAフイルム１１はテトラフルオロエチレン−
パーフルオロアルキルビニルエーテル共重合体の
略称であり、非粘着性の熱融着型フイルムであ
る。
以下に、PFAフイルム１１の特性を列挙する。
INDUSTRIAL APPLICATION FIELD The present invention relates to an electroluminescent lamp, and more particularly to improving the sealing performance of a seal path portion of a lead sealed with an outer skin film in an organic dispersion type electroluminescent lamp. Conventional technology Conventionally, organic dispersion type electroluminescent lamps are shown in Figures 5 and 6.
As shown in the figure, the back electrode 1 is made of aluminum foil, etc.
Insulator (e.g. high dielectric powder like BaTiO3 ) and phosphor (e.g. ZnS:Cu-based phosphor) on top
are dispersed in an organic binder to form an insulating layer 2 and a light emitting layer 3, and a transparent electrode 5 made of a transparent conductive film or the like on which a current collecting band 4 is printed is laminated thereon. The electroluminescent element 7 is covered with water-absorbing films (e.g., nylon-6) 6, 6 from above and below, and is further covered with moisture-proof outer films (e.g., trifluorochloroethylene) from above and below.
It has a hermetically sealed structure. Note that leads 9, 9 are electrically connected to the back electrode 1 and the transparent electrode 5, respectively, and led out to the outside. Problems to be Solved by the Invention Regarding the electroluminescent lamp having the above structure, FIG. 5 shows a plan view of the seal path portion of the lead sealed with the outer skin film, and FIG. 6 shows an enlarged sectional view of the main part of FIG. 5.
Here, when the seal pass portion 10 of the lead and the portion where the electroluminescent element 7 is sandwiched between the outer skin films 8, 8 are thermocompressed with a single roll, the thickness is smaller than that of the electroluminescent element 7 of the leads 9, 9. Because of the thinness, the leads 9, 9 are sealed in a considerably bent state as shown in FIG. Therefore, at the lead sealing portions 8a, 8a of the outer skin films 8, 8, stress is applied to the outer film due to the bent leads in the direction of peeling off the seal from the inside, resulting in poor sealing performance. In addition, since the single surface is thermocompression bonded using a roll with a smooth surface, the pressure applied by the roll at the seal pass portion 10 of the lead that only sandwiches the thin leads 9, 9 is low, resulting in poor sealing performance. Put it away. Due to these structural problems, during sealing, air bubbles a tend to enter the seal path portion 10 of the lead, as shown in FIG. This is one of the causes of reduced life expectancy. Currently, as a countermeasure, the seal pass portion 10 of the lead into which air bubbles a have entered is again thermocompressed, and air bubbles a
Two methods have been adopted: expelling the bubbles or lengthening the seal path part 10 of the lead in the lead direction, but the former method requires a lot of man-hours because it requires inspection for the presence of air bubbles a and then reheat bonding. ,Also,
In the latter method, the effective light emitting area of the electroluminescent lamp becomes narrow because the seal path becomes long. Means for Solving the Problems In order to solve the above problems, in the present invention, when sealing an electroluminescent element with an outer skin film, a back electrode,
A heat-adhesive fluororesin film (hereinafter referred to as PFA film) with approximately the same thickness as the laminate consisting of the insulating layer and the light-emitting layer is sandwiched between the upper and lower leads, and the electroluminescent element and the leads are sandwiched between the upper and lower leads. It is characterized by eliminating the difference in thickness between the lead and the seal pass part, sealing with a single roll and with the same pressing force, and simultaneously removing air bubbles in the seal pass part of the lead. Function Since there is no difference in thickness between the electroluminescent element and the seal path portion of the lead, air bubbles will not enter the seal path portion of the lead during sealing, and it will be easier to use.
PFA film has an extremely low water absorption rate, which improves the moisture resistance reliability of electroluminescent lamps. Examples Examples of the present invention will be described. FIG. 1 is an enlarged sectional view of an electroluminescent lamp according to the present invention. Its structure consists of an insulator (e.g., high dielectric constant powder such as BaTiO 3 ) and a phosphor (e.g., ZnS:Cu-based phosphor) placed on a back electrode made of aluminum foil 1 in an organic binder (e.g., cellulose resin). The insulating layer 2 and the light-emitting layer 3 are formed by sequentially coating the respective dispersed materials.
A transparent electrode 5 made of a transparent conductive film or the like printed with the above is pasted together, and an electroluminescent element 7 is formed by covering it with a water-absorbing film (for example, nylon-6) 6, 6 from above and below, and then a moisture-proof outer film ( For example, it is sandwiched between fluorine-based films 8, 8, and the peripheral overlapping parts of the outer skin films 8, 8 are welded and hermetically sealed by a hot roll press described below, and furthermore, both the internal electrodes described above are Aluminum foil 1, insulating layer 2,
A PFA film 11 having the same thickness as the laminate consisting of the light emitting layer 3 is interposed. Here, the PFA film 11 will be explained.
PFA film 11 is tetrafluoroethylene-
It is an abbreviation for perfluoroalkyl vinyl ether copolymer, and is a non-adhesive heat-sealable film. The characteristics of the PFA film 11 are listed below.
【表】
PFAフイルム１１は、上記表に示すように、
特性上非常に安定な素材であり、吸水率が極めて
低い熱融着性のフイルムである。
PFAフイルム１１をリードのシールパス部１
０に介在させた本考案の封止方法は第２図に示す
ように、電界発光素子７を連続的に外皮フイルム
８，８で上下から封止していく連続シーラを使用
して、電界発光素子７のリードのシールパス部１
０にPFAフイルム１１をリード９，９で挟まれ
るように供給し、熱ロール１２を通して溶着封止
する。ここで、PFAフイルム１１の厚さをアル
ミ箔１、絶縁層２、発光層３よりなる積層体と同
じ厚さにしているため、第１図に示すようにリー
ド９，９は折り曲がることなく封止される。それ
故、リード９，９に過剰な応力が加わらず、封止
時においてリードのシールパス部１０に気泡が入
り込むことはない。またPFAフイルム１１は吸
水率が極めて低いためリードのシールパス部１０
からの湿気の侵入はほとんどなく、より一層の信
頼性を確保できる。
また、第３図に示すように、リード９，９の反
対側のシールパス部１０ａにPFAフイルム１１
を介在させることにより電界発光素子７と上記シ
ールパス部１０ａの厚さの段差をなくし、そのシ
ールパス部１０ａに気泡が入らないように封止す
ることができる。更に、多少工数及び材料費がか
かるものの、第４図のように全周囲のシールパス
部１０，１０ａ，１０ｂにPFAフイルム１１を
介在させることによりシールパス部分の気泡を全
て除去することができ、より信頼性を上げること
が可能となる。加えて、PFAフイルム１１は吸
水性がほとんどないため、シールパス長をごく小
さくでき、そのことにより有効発光エリアを大き
くすることが可能となる。
考案の効果
本考案によれば、有機型電界発光灯のリードの
シールパス部にPFAフイルムを介在し、その厚
さを電界発光素子と同じ厚さにしているため、リ
ードに応力を加えることなく封止することができ
る。それ故、封止時においてリードのシールパス
部分に気泡が入り込むことがなく封止性が良く、
耐湿性にすぐれるので、電界発光灯の信頼性をよ
り向上させることができる。
また、本考案に用いたPFAフイルムは吸水性
がほとんどなく、リードのシールパス長をより短
くできるので、有効発光面の大きな電界発光灯
を、提供することができる。[Table] As shown in the table above, PFA film 11 is
It is an extremely stable material and a heat-adhesive film with extremely low water absorption. Seal pass section 1 with PFA film 11 lead
As shown in FIG. 2, the sealing method of the present invention in which the electroluminescent element 7 is sealed with outer skin films 8, 8 from above and below is used to seal the electroluminescent element 7 from above and below. Seal path part 1 of lead of element 7
A PFA film 11 is supplied to the film 0 so as to be sandwiched between the leads 9, 9, and then passed through a hot roll 12 for welding and sealing. Here, since the thickness of the PFA film 11 is the same as that of the laminate consisting of the aluminum foil 1, the insulating layer 2, and the light emitting layer 3, the leads 9, 9 do not bend as shown in FIG. sealed. Therefore, no excessive stress is applied to the leads 9, 9, and no air bubbles enter the seal path portion 10 of the leads during sealing. In addition, since the PFA film 11 has an extremely low water absorption rate, the seal pass portion 10 of the lead
There is almost no moisture intrusion from the inside, ensuring even higher reliability. In addition, as shown in FIG.
By interposing the seal pass portion 10a, the difference in thickness between the electroluminescent element 7 and the seal pass portion 10a can be eliminated, and the seal pass portion 10a can be sealed to prevent air bubbles from entering. Furthermore, although it requires some man-hours and material costs, by interposing the PFA film 11 around the seal path portions 10, 10a, and 10b around the entire periphery as shown in Fig. 4, all air bubbles in the seal path portion can be removed, making it more reliable. It is possible to increase the quality. In addition, since the PFA film 11 has almost no water absorption, the seal path length can be made very small, thereby making it possible to enlarge the effective light emitting area. Effects of the invention According to the invention, a PFA film is interposed in the seal path part of the lead of an organic electroluminescent lamp, and its thickness is the same as that of the electroluminescent element, so the seal is sealed without applying stress to the lead. can be stopped. Therefore, when sealing, air bubbles do not enter the seal path part of the lead, resulting in good sealing performance.
Since it has excellent moisture resistance, the reliability of the electroluminescent lamp can be further improved. Furthermore, the PFA film used in the present invention has almost no water absorption, and the seal path length of the lead can be made shorter, making it possible to provide an electroluminescent lamp with a large effective light emitting surface.
第１図は本考案の一実施例である電界発光灯の
拡大断面図である。第２図は、本考案による電界
発光灯の封止方法を示す一部切開き平面図であ
る。第３図及び第４図は本考案による電界発光灯
の他の実施例を示す一部切開き平面図である。第
５図及び第６図は従来の有機型電界発光灯を示
し、第５図はリードのシールパス部の一部切開き
平面図、第６図は要部拡大断面図である。
１……背面電極、２……絶縁層、３……発光
層、５……透明電極、７……電界発光素子、８…
…外皮フイルム、９……リード、１０……リード
のシールパス部、１１……フツ素系樹脂フイルム
（PFAフイルム）。
FIG. 1 is an enlarged sectional view of an electroluminescent lamp which is an embodiment of the present invention. FIG. 2 is a partially cutaway plan view showing a method for sealing an electroluminescent lamp according to the present invention. 3 and 4 are partially cutaway plan views showing other embodiments of the electroluminescent lamp according to the present invention. 5 and 6 show a conventional organic electroluminescent lamp, FIG. 5 is a partially cutaway plan view of the seal path portion of the lead, and FIG. 6 is an enlarged sectional view of the main part. DESCRIPTION OF SYMBOLS 1... Back electrode, 2... Insulating layer, 3... Light emitting layer, 5... Transparent electrode, 7... Electroluminescent element, 8...
...Outer film, 9...Lead, 10...Seal pass portion of lead, 11...Fluorine resin film (PFA film).
Claims (1)
持した電界発光素子を、背面電極及び透明電極か
らリードを導出して外皮フイルムで密閉封止した
電界発光灯において、 少なくとも前記リードのシールパス部に、背面
電極、絶縁層、発光層からなる積層体と略同一厚
さの熱融着性のフツ素系樹脂フイルムを上下のリ
ードに挟まれるように介在させ封止し段差を解消
してなることを特徴とする電界発光灯。[Scope of Claim for Utility Model Registration] An electroluminescent lamp in which an electroluminescent element has an insulating layer and a light emitting layer sandwiched between a back electrode and a transparent electrode, leads are led out from the back electrode and the transparent electrode, and hermetically sealed with an outer film, At least in the seal path portion of the lead, a heat-sealable fluorine-based resin film having approximately the same thickness as the laminate consisting of the back electrode, insulating layer, and light-emitting layer is interposed between the upper and lower leads for sealing. An electroluminescent lamp characterized by eliminating steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988023664U JPH054714Y2 (en) | 1988-02-23 | 1988-02-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988023664U JPH054714Y2 (en) | 1988-02-23 | 1988-02-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01127193U JPH01127193U (en) | 1989-08-30 |
| JPH054714Y2 true JPH054714Y2 (en) | 1993-02-05 |
Family
ID=31242846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988023664U Expired - Lifetime JPH054714Y2 (en) | 1988-02-23 | 1988-02-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH054714Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60208088A (en) * | 1984-03-31 | 1985-10-19 | ダイキン工業株式会社 | Method of producing electroluminescent plate |
| JPS61183895A (en) * | 1985-02-08 | 1986-08-16 | 関西日本電気株式会社 | Manufacture of organic type el |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58178298U (en) * | 1982-05-24 | 1983-11-29 | 日本電気ホームエレクトロニクス株式会社 | Electrode lead sealing structure of electroluminescent lamp |
-
1988
- 1988-02-23 JP JP1988023664U patent/JPH054714Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60208088A (en) * | 1984-03-31 | 1985-10-19 | ダイキン工業株式会社 | Method of producing electroluminescent plate |
| JPS61183895A (en) * | 1985-02-08 | 1986-08-16 | 関西日本電気株式会社 | Manufacture of organic type el |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01127193U (en) | 1989-08-30 |
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