JPH0436725A - Liquid crystal display panel - Google Patents
Liquid crystal display panelInfo
- Publication number
- JPH0436725A JPH0436725A JP14150290A JP14150290A JPH0436725A JP H0436725 A JPH0436725 A JP H0436725A JP 14150290 A JP14150290 A JP 14150290A JP 14150290 A JP14150290 A JP 14150290A JP H0436725 A JPH0436725 A JP H0436725A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display panel
- crystal display
- moisture
- bases
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 30
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims description 17
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 abstract description 3
- -1 polyethylene Polymers 0.000 abstract description 3
- 229920000573 polyethylene Polymers 0.000 abstract description 3
- 239000007767 bonding agent Substances 0.000 abstract 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000012943 hotmelt Substances 0.000 abstract 1
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 description 6
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000000807 solvent casting Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、耐水性に優れたポリマー分散型の液晶表示パ
ネルに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a polymer-dispersed liquid crystal display panel with excellent water resistance.
本発明の液晶表示パネルは、各種デイスプレィ、光シャ
ッタ、制御装置等へ使用でき、特に大画面用の液晶表示
パネルとして好適に使用することができる。The liquid crystal display panel of the present invention can be used for various displays, optical shutters, control devices, etc., and can be particularly suitably used as a liquid crystal display panel for large screens.
最近、特公表昭５８−５０１６３１号公報等において液
晶が媒体中に分散された媒体層からなるポリマー分散型
の液晶表示パネルが提案されている。Recently, a polymer-dispersed liquid crystal display panel comprising a medium layer in which liquid crystals are dispersed has been proposed in Japanese Patent Publication No. 58-501631.
このポリマー分散型の液晶表示パネルを封止する方法と
しては、従来の、あらかじめ２枚の基板の周縁部を封止
材でシールしておき、注入孔より液晶を充填した後に、
注入口を封口するという方法を採用することができない
。The conventional method for sealing this polymer-dispersed liquid crystal display panel is to seal the peripheral edges of two substrates with a sealant in advance, fill the liquid crystal through the injection hole, and then
It is not possible to use a method of sealing the injection port.
従って、このポリマー分散型の液晶表示パネルを封止す
るためには、２枚の基板によりポリマー分散型液晶を挟
んだ後に、基板周縁部をエポキシ樹脂を用いて封止する
方法を採っていた。Therefore, in order to seal this polymer-dispersed liquid crystal display panel, a method has been adopted in which the polymer-dispersed liquid crystal is sandwiched between two substrates, and then the periphery of the substrates is sealed using an epoxy resin.
この場合、セル内部の液晶が、熱により変質するのを避
けるため、エポキシ樹脂の硬化が充分できない問題があ
った。そのため、封止が不充分となり、水分が内部に侵
入しやすくなり長期使用中に液晶表示パネルの性能が劣
化するという欠点があった。In this case, there was a problem in that the epoxy resin could not be sufficiently cured in order to prevent the liquid crystal inside the cell from deteriorating due to heat. As a result, the sealing becomes insufficient, moisture easily enters the inside, and the performance of the liquid crystal display panel deteriorates during long-term use.
本発明者らは上記問題点を解決するために鋭意研究を行
った結果本発明に至った。The present inventors conducted extensive research in order to solve the above problems, and as a result, they arrived at the present invention.
本発明は、透明電極が配設された２枚の基板と、液晶が
媒体中に分散された媒体層とからなり、媒体層が前記２
枚の基板により透明電極面が対向するように挟持された
液晶表示パネルにおいて、基板周縁部を接着剤を塗布し
た防湿性フィルムで被覆して封止することを特徴とする
液晶表示パネルに関する。The present invention consists of two substrates on which transparent electrodes are disposed, and a medium layer in which liquid crystal is dispersed in the medium, and the medium layer is
The present invention relates to a liquid crystal display panel in which the peripheral edge of the substrate is covered and sealed with a moisture-proof film coated with an adhesive, in which the liquid crystal display panel is sandwiched between two substrates so that the transparent electrode surfaces face each other.
以下に本発明を図面を参照して説明する。The present invention will be explained below with reference to the drawings.
第１図は、本発明の液晶表示パネルの部分拡大の縦断面
図である。４は液晶が媒体中に分散された媒体層であり
、媒体層４は、透明電極が配設された２枚の基板１．５
によって透明電極面が対向するように挟持されている。FIG. 1 is a partially enlarged vertical sectional view of a liquid crystal display panel of the present invention. 4 is a medium layer in which liquid crystal is dispersed in the medium, and the medium layer 4 includes two substrates 1.5 on which transparent electrodes are disposed.
The transparent electrode surfaces are sandwiched between the electrodes so that they face each other.
基板周縁部には防湿性フィルム２が配設され、接着剤３
により接着されている。A moisture-proof film 2 is disposed on the peripheral edge of the substrate, and an adhesive 3
It is glued by.
本発明における防湿性フィルムとしては、特に限定され
ないが、ポリエチレン、ポリ塩化ビニリデンなどのフィ
ルムを挙げることができる。The moisture-proof film in the present invention is not particularly limited, but includes films such as polyethylene and polyvinylidene chloride.
上記のフィルムに塗布される接着剤としては、特に限定
されないが、ホットメルト系接着剤、紫外線硬化型接着
剤、熱硬化型接着剤などを好適に用いることができる。The adhesive applied to the above film is not particularly limited, but hot melt adhesives, ultraviolet curable adhesives, thermosetting adhesives, and the like can be suitably used.
本発明の媒体層は、液晶が媒体中に分散された媒体層で
あり、この具体例としては、ポリマー分散型液晶、例え
ば、液晶微粒滴を水溶性ポリマーでカプセル状に包含し
たＮ ＣＡ Ｐ （Ｎｅｍａｔｉｃ Ｃｕｒｖｉｌｉｎ
ｅａｒ Ａｌｉｇｎｅｄ Ｐｈａｓｅ：ネマチック曲線
式整列相）液晶（特公表昭５８−５０１６３１号公報）
、ラテックス取り込み液晶（特開昭６０−２５２６８７
号公報）、液晶微小滴をエポキシ樹脂中に分散した物質
（特公表昭６１−５０２１２８号公報）、あるいは溶媒
キャスト法により調製した網目構造の液晶複合膜（Ｐｏ
ｌｙｍｅｒ Ｐｒｅｐｒｉｎｔｓ、Ｊａｐａｎ ｖｏｌ
、３７．Ｎｏ、８．２４５０（１９８８））等を挙げる
ことができる。The medium layer of the present invention is a medium layer in which liquid crystal is dispersed in the medium, and a specific example thereof is a polymer-dispersed liquid crystal, such as N CA P (N CA P ( Nematic Curvilin
ear Aligned Phase: Nematic curve aligned phase) liquid crystal (Special Publication No. 58-501631)
, latex-incorporated liquid crystal (Japanese Patent Application Laid-Open No. 60-252687
), a material in which liquid crystal microdroplets are dispersed in epoxy resin (Japanese Patent Publication No. 61-502128), or a liquid crystal composite film with a network structure prepared by a solvent casting method (Po
lymer Preprints, Japan vol.
, 37. No. 8.2450 (1988)).
以下に実施例を示し、本発明をさらに詳細に説明する。 EXAMPLES The present invention will be explained in further detail by way of Examples below.
実施例１
１０％ＰＶＡ水溶液、液晶、二色性染料〔ＰｖＡ：液晶
−１：３．５（重量比）、二色性染料は液晶の３重量％
〕をよく混合し、これを予めＩＴＯなどにより所定の電
極バターニングした透明型極付の基板に、ドクターブレ
ードを用いて塗布乾燥したく厚さ１５μｍ）。この基板
と予めＩＴＯ等により所定の電極をバターニングした他
方の基板とを所定の位置で合うように貼り合わせ液晶表
示パネルを作製した。Example 1 10% PVA aqueous solution, liquid crystal, dichroic dye [PvA:liquid crystal-1:3.5 (weight ratio), dichroic dye is 3% by weight of liquid crystal
] and then coated with a doctor blade on a transparent electrode-equipped substrate that had been patterned with ITO or the like in advance to a thickness of 15 μm). A liquid crystal display panel was fabricated by bonding this substrate to another substrate on which predetermined electrodes had been patterned using ITO or the like in advance so as to match each other at a predetermined position.
第１図に示すように、基板周縁部をホントメルト接着剤
を塗布したポリエチレンフィルムにて被覆することによ
り、液晶表示パネルを封止した。As shown in FIG. 1, the liquid crystal display panel was sealed by covering the peripheral edge of the substrate with a polyethylene film coated with a true melt adhesive.
前記の液晶表示パネルを、６０“Ｃ１９５％湿度の条件
で、５００時間の耐湿性試験を行った。The above liquid crystal display panel was subjected to a 500 hour moisture resistance test under the conditions of 60"C195% humidity.
５０Ｖ印加した時の抵抗値は、試験前が４．７×１０９
Ω、試験後が４．２Ｘ１０９Ωであり、はとんど変化し
なかった。The resistance value when 50V was applied was 4.7×109 before the test.
Ω was 4.2×10 9 Ω after the test, and did not change at all.
比較例１
封止材として、従来公知の二液型エポキシ樹脂接着剤の
みを使用した以外は実施例１と同様な方法で液晶表示パ
ネルを作製し、６０°Ｃ１９５％湿度の条件で、５００
時間の耐湿性試験を行った。Comparative Example 1 A liquid crystal display panel was manufactured in the same manner as in Example 1 except that only a conventionally known two-component epoxy resin adhesive was used as the sealing material.
A time moisture resistance test was conducted.
５０Ｖ印加した時の抵抗値は、試験前が５．４×１０９
Ω、試験後が２．３Ｘ１０’Ωであり、大きく抵抗が低
下した。The resistance value when 50V was applied was 5.4 x 109 before the test.
The resistance was 2.3×10'Ω after the test, which was a significant decrease in resistance.
本発明の液晶表示パネルは、基板周縁部を防湿性フィル
ムで被覆して密封しているため、吸湿性が小さく、長期
信軌性が改良できる。In the liquid crystal display panel of the present invention, since the peripheral edge of the substrate is covered and sealed with a moisture-proof film, moisture absorption is small and long-term signal performance can be improved.
第１図は、本発明の液晶表示パネルの周縁部の断面図で
ある。
１．５：基板
２ ：防湿性フィルム
３ ：接着剤
４ ：媒体層
特許出願人 宇部興産株式会社FIG. 1 is a sectional view of the peripheral portion of the liquid crystal display panel of the present invention. 1.5: Substrate 2: Moisture-proof film 3: Adhesive 4: Media layer Patent applicant Ube Industries, Ltd.
Claims (1)
散された媒体層とからなり、媒体層が前記２枚の基板に
より透明電極面が対向するように挟持された液晶表示パ
ネルにおいて、基板周縁部を接着剤を塗布した防湿性フ
ィルムで被覆して封止することを特徴とする液晶表示パ
ネル。A liquid crystal display panel consisting of two substrates provided with transparent electrodes and a medium layer in which liquid crystal is dispersed in the medium, the medium layer being sandwiched between the two substrates so that the transparent electrode surfaces face each other. A liquid crystal display panel characterized in that the peripheral edge of the substrate is covered and sealed with a moisture-proof film coated with an adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14150290A JPH0436725A (en) | 1990-06-01 | 1990-06-01 | Liquid crystal display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14150290A JPH0436725A (en) | 1990-06-01 | 1990-06-01 | Liquid crystal display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0436725A true JPH0436725A (en) | 1992-02-06 |
Family
ID=15293444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14150290A Pending JPH0436725A (en) | 1990-06-01 | 1990-06-01 | Liquid crystal display panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0436725A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5610742A (en) * | 1991-08-01 | 1997-03-11 | Seiko Epson Corporation | Liquid crystal display element, methods of producing and storing the same, and electronic equipment on which the same is mounted |
| KR20020056724A (en) * | 2000-12-29 | 2002-07-10 | 주식회사 현대 디스플레이 테크놀로지 | Method for fabricating liquid crystal display module with humidity-proof |
| US10865104B2 (en) * | 2018-01-30 | 2020-12-15 | Commissariat à l'énergie atomique et aux énergies alternatives | Process for encapsulation of a microelectronic device by easily manipulated thin or ultrathin substrates |
-
1990
- 1990-06-01 JP JP14150290A patent/JPH0436725A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5610742A (en) * | 1991-08-01 | 1997-03-11 | Seiko Epson Corporation | Liquid crystal display element, methods of producing and storing the same, and electronic equipment on which the same is mounted |
| US5687465A (en) * | 1991-08-01 | 1997-11-18 | Seiko Epson Corporation | Method of removing a bubble from a liquid crystal display element |
| KR20020056724A (en) * | 2000-12-29 | 2002-07-10 | 주식회사 현대 디스플레이 테크놀로지 | Method for fabricating liquid crystal display module with humidity-proof |
| US10865104B2 (en) * | 2018-01-30 | 2020-12-15 | Commissariat à l'énergie atomique et aux énergies alternatives | Process for encapsulation of a microelectronic device by easily manipulated thin or ultrathin substrates |
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