JPH02197819A - Phase difference plate and polarizing plate composite for liquid crystal display - Google Patents
Phase difference plate and polarizing plate composite for liquid crystal displayInfo
- Publication number
- JPH02197819A JPH02197819A JP1016408A JP1640889A JPH02197819A JP H02197819 A JPH02197819 A JP H02197819A JP 1016408 A JP1016408 A JP 1016408A JP 1640889 A JP1640889 A JP 1640889A JP H02197819 A JPH02197819 A JP H02197819A
- Authority
- JP
- Japan
- Prior art keywords
- polarizing plate
- pressure
- film
- sensitive adhesive
- liquid crystal
- 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
- 239000002131 composite material Substances 0.000 title claims description 18
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 46
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 11
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 39
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 4
- 239000004417 polycarbonate Substances 0.000 abstract description 3
- 229920000515 polycarbonate Polymers 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 4
- 239000006260 foam Substances 0.000 abstract 1
- 210000002858 crystal cell Anatomy 0.000 description 9
- 239000011521 glass Substances 0.000 description 7
- 229920002284 Cellulose triacetate Polymers 0.000 description 6
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 239000003522 acrylic cement Substances 0.000 description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 125000002843 carboxylic acid group Chemical group 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N Bisphenol A Natural products C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- -1 bisphenol A carbonate ester Chemical class 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発°明は、液晶セルを用いる液晶ディスプレイ用位相
差板及び偏光板複合体に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a retardation plate and polarizing plate composite for a liquid crystal display using a liquid crystal cell.
従来の技術
一般に知られている液晶ディスプレイは、第５図に示す
ように、液晶セル５の上下両面に接着剤３Ｃを介して上
ｍ漏光板フィルム２ａ及び下ｌ！ｌｌ光板フィルム２ｂ
を貼り付けた形で使用されている。ところが、このよう
な構造の液晶ディスプレイは、偏光板フィルムによる光
の副屈折等により、表示がやや着色された状態になると
言う問題があった。BACKGROUND OF THE INVENTION As shown in FIG. 5, a generally known liquid crystal display has an upper (m) light leakage plate film 2a and a lower (l) film which are bonded to the upper and lower surfaces of a liquid crystal cell 5 via an adhesive 3C. ll light plate film 2b
It is used in a pasted form. However, a liquid crystal display having such a structure has a problem in that the display becomes slightly colored due to sub-refraction of light due to the polarizing plate film.
そこで、この着色を消して白黒の表示を得るために、第
６図に示すように、上側偏光板フィルム２ａと液晶セル
５との間に、ポリカーボネート樹脂等の延伸フィルムよ
りなる位相差板フィルム１を光学補正板として設けるこ
とが検討されている。Therefore, in order to eliminate this coloring and obtain a black and white display, a retardation plate film 1 made of a stretched film of polycarbonate resin or the like is placed between the upper polarizing plate film 2a and the liquid crystal cell 5, as shown in FIG. Providing an optical correction plate as an optical correction plate is being considered.
すなわち、上側偏光板フィルム２ａに感圧接着剤層３Ｃ
を設けたものを、位相差板フィルム１と積層して複合体
とし、それを、感圧接着剤層３ｂを介して液晶セル５の
一面に貼着することによって、位相差板フィルムを上側
偏光板フィルムと液晶セルとの間に介在させることが行
われている。That is, the pressure sensitive adhesive layer 3C is applied to the upper polarizing plate film 2a.
is laminated with the retardation film 1 to form a composite, and this is adhered to one surface of the liquid crystal cell 5 via the pressure-sensitive adhesive layer 3b. The liquid crystal cell is interposed between the plate film and the liquid crystal cell.
発明が解決しようとする課題
ところで、従来の位相差板フィルムを設けた液晶ディス
プレイは、例えば、耐熱・耐湿特性試験を行なう等、高
温高温の条件下において、位相差板フィルムと上ＩＰ！
ＩＮ光板フィルムとの間に泡や剥がれが発生し、良好な
特性が得られないという問題があった。Problems to be Solved by the Invention By the way, a liquid crystal display provided with a conventional retardation film has not been tested under high-temperature conditions, such as when conducting a heat resistance/moisture resistance property test.
There was a problem in that bubbles and peeling occurred between the film and the IN optical plate film, making it impossible to obtain good characteristics.
本発明は、従来の技術における上記のような間組点に鑑
みてなされたものである。The present invention has been made in view of the above-mentioned interlacing points in the prior art.
したがって、本発明の目的は、高温高湿の条件下におい
ても、位相差板と偏光板との間に泡、剥がれ等が発生し
ない液晶ディスプレイを製造するなめに使用する位相差
板及び偏光板複合体を提供することにある。Therefore, an object of the present invention is to provide a composite of a retardation plate and a polarizing plate used for manufacturing a liquid crystal display in which bubbles, peeling, etc. do not occur between the retardation plate and the polarizing plate even under high temperature and high humidity conditions. It's about offering your body.
課題を解決するための手段
本発明者等は、検討の結果、従来の位相差板を設けた液
晶ディスプレイにおける上記の問題点は、位相差板フィ
ルムがポリカーボネート等の疎水性プラスチックで形成
されているため、表面の濡れ性が小さく、したがって接
着性が悪いために発生することを見出だし、本発明を完
成するに至った。Means for Solving the Problems As a result of study, the present inventors have found that the above-mentioned problems with conventional liquid crystal displays provided with a retardation plate are caused by the fact that the retardation film is made of a hydrophobic plastic such as polycarbonate. Therefore, the inventors discovered that this occurs because the wettability of the surface is low and therefore the adhesion is poor, and the present invention was completed.
本発明の液晶ディスプレイ用位相差板は、疎水性プラス
チックよりなる延伸フィルムの両面に、感圧接着剤層を
設けたことを特徴とする。The retardation plate for liquid crystal displays of the present invention is characterized in that pressure-sensitive adhesive layers are provided on both sides of a stretched film made of hydrophobic plastic.
また、本発明の液晶ディスプレイ用偏光板複合体は、疎
水性プラスチックよりなる延伸フィルムの両面に感圧接
着剤層を設けてなる位相差板の一面に、偏光板フィルム
上に感圧接着剤層を設けてなる偏光板を、該偏光板の感
圧接着剤層と位相差板の感圧接着剤層とが対向するよう
に貼着してなることを特徴とする。In addition, the polarizing plate composite for a liquid crystal display of the present invention has a pressure-sensitive adhesive layer on one side of a retardation plate formed by providing a pressure-sensitive adhesive layer on both sides of a stretched film made of hydrophobic plastic, and a pressure-sensitive adhesive layer on one side of the polarizing plate film. The invention is characterized in that a polarizing plate provided with the above is attached so that the pressure-sensitive adhesive layer of the polarizing plate and the pressure-sensitive adhesive layer of the retardation plate face each other.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
第１図は、本発明の液晶ディスプレイ用位相差板の模式
的断面図である０図中、１は位相差板フィルムであり、
その上下両面に感圧接着剤Ｎｌ３ａ及び３ｂが設けられ
ている。感圧接着剤／ｉ３ａ及び３ｂの上に保護の為の
剥離フィルム４ａ及び４ｂがそれぞれ貼着されている。FIG. 1 is a schematic cross-sectional view of a retardation plate for a liquid crystal display of the present invention. In FIG. 0, 1 is a retardation film;
Pressure sensitive adhesives Nl3a and 3b are provided on both the upper and lower surfaces. Peeling films 4a and 4b for protection are stuck on the pressure sensitive adhesives/i3a and 3b, respectively.
第２図は、本発明の液晶ディスプレイ用偏光板複合体の
模式的断面図である。図中、１は位相差板フィルムであ
り、その上下両面に感圧接着剤層３ａ及び３ｂが設けら
れている。また、２は偏光板フィルムであり、片面に感
圧接着剤層３ｃが設けられている。そして、位相差板フ
ィルム１と偏光板フィルム２とは、位相差板フィルムに
設けられた感圧接着剤層３ａと偏光板フィルムに設けら
れた感圧接着剤層３Ｃとが対向するように貼着され、一
体化されてた状態になっている。また、感圧接着剤層３
ｂに隣接して、保護の為の剥離フィルム４Ｃが貼り付け
られている。FIG. 2 is a schematic cross-sectional view of a polarizing plate composite for a liquid crystal display of the present invention. In the figure, 1 is a retardation film, and pressure sensitive adhesive layers 3a and 3b are provided on both upper and lower surfaces of the film. Moreover, 2 is a polarizing plate film, and a pressure sensitive adhesive layer 3c is provided on one side. The retardation plate film 1 and the polarizing plate film 2 are pasted together so that the pressure-sensitive adhesive layer 3a provided on the retardation plate film and the pressure-sensitive adhesive layer 3C provided on the polarizing plate film face each other. It is now in a state where it has been worn and integrated. In addition, the pressure sensitive adhesive layer 3
A release film 4C for protection is attached adjacent to b.
また、第３図は、本発明の液晶ディスプレイ用偏光板複
合体の製造に使用することができる偏光板の模式的断面
図である。偏光板フィルム２の一面には感圧接着剤層３
Ｃが設けられ、さらに該感圧接着剤層に隣接して剥離フ
ィルム４Ｃが積層されている。Moreover, FIG. 3 is a schematic cross-sectional view of a polarizing plate that can be used for manufacturing the polarizing plate composite for a liquid crystal display of the present invention. A pressure sensitive adhesive layer 3 is provided on one side of the polarizing plate film 2.
C is provided, and a release film 4C is further laminated adjacent to the pressure sensitive adhesive layer.
本発明の位相差板を構成する位相差板フィルムとしては
、ポリカーボネート等の公知の疎水性プラスチックより
なる延伸フィルムが使用される。As the retardation film constituting the retardation plate of the present invention, a stretched film made of a known hydrophobic plastic such as polycarbonate is used.
位相差板の両面の感圧接着剤層は、感圧接着剤を位相差
フィルムの両面に塗布することによって形成される。感
圧接着剤としては、公知のものか使用でき、例えば、ブ
チルアクリレート又は２−エチルへキシルアクリレート
を主成分とし、官能基としてカルボキシル基、水酸基或
いはアミノ基を導入したアクリル系粘着剤を使用するこ
とができる。The pressure-sensitive adhesive layers on both sides of the retardation plate are formed by applying pressure-sensitive adhesive to both sides of the retardation film. As the pressure-sensitive adhesive, any known pressure-sensitive adhesive can be used; for example, an acrylic adhesive containing butyl acrylate or 2-ethylhexyl acrylate as a main component and into which a carboxyl group, hydroxyl group, or amino group is introduced as a functional group is used. be able to.
一方、本発明の偏光板複合体において、偏光板を構成す
る偏光板フィルムは、公知のものならばどのようなもの
でも使用することができる０例えば、セルローストリア
セテート／ポリビニルアルコール／セルローストリアセ
テートの三層構造よりなるものが代表的なものとしてあ
げられる。On the other hand, in the polarizing plate composite of the present invention, any known polarizing plate film can be used as the polarizing plate film constituting the polarizing plate. For example, a triple layer of cellulose triacetate/polyvinyl alcohol/cellulose triacetate can be used. A typical example is one consisting of a structure.
偏光板に設けられる感圧接着剤層は、公知の感圧接着剤
ならばどの様なものでも使用可能であるが、位相差板に
用いた感圧接着剤と同−組成又は同種のものを使用する
のが好ましい。Any known pressure-sensitive adhesive can be used for the pressure-sensitive adhesive layer provided on the polarizing plate, but a pressure-sensitive adhesive with the same composition or the same type as that used for the retardation plate may be used. It is preferable to use
偏光板複合体の作製は、上記第１図に示されるような位
相差板と上記第３図に示されるような偏光板とを、常温
において、位相差板の感圧接着剤眉の一方と、偏光板の
感圧接着剤層とが対向するように重ね合わせ、卓上ラミ
ネーター又はロールによって泡を巻き込まない程度に加
圧することによって行なえばよい。To produce a polarizing plate composite, a retardation plate as shown in FIG. 1 above and a polarizing plate as shown in FIG. This may be done by stacking the polarizing plate so that the pressure-sensitive adhesive layer and the polarizing plate face each other, and applying pressure using a tabletop laminator or a roll to an extent that does not entrain bubbles.
第４図は、本発明の液晶ディスプレイ用位相差板又は偏
光板複合体が使用された状態を説明するもので、液晶セ
ルのガラス板５ａに、第１図で示される位相差板が貼り
付けられ、更にその上に第３図で示される偏光板が貼り
付けられるか、又は第２図で示される本発明の偏光板複
合体が貼り付けられた状態を示すものである。また、本
発明の位相差板を複数使用し、液晶セルのガラス板上に
複数の位相差板を重ね合わせて圧着し、その上に偏光板
フィルムを貼り付けることも可能である。FIG. 4 illustrates a state in which the retardation plate or polarizing plate composite for a liquid crystal display of the present invention is used, in which the retardation plate shown in FIG. 1 is pasted on the glass plate 5a of a liquid crystal cell. The polarizing plate shown in FIG. 3 is attached thereto, or the polarizing plate composite of the present invention shown in FIG. 2 is attached thereto. It is also possible to use a plurality of retardation plates of the present invention, to overlap and press-bond the plurality of retardation plates on a glass plate of a liquid crystal cell, and to affix a polarizing plate film thereon.
作用
本発明の位相差板は、上記のように疎水性延伸フィルム
よりなる位相差板フィルムの両面に感圧接着剤層を設け
てなるから、これを感圧接着剤層が設けられた偏光板と
組み合わせて使用した場合、位相差板フィルム上の感圧
接着剤層と偏光板フィルム状の感圧接着剤層とが接合さ
れることになり、。Function The retardation plate of the present invention is formed by providing a pressure-sensitive adhesive layer on both sides of a retardation film made of a hydrophobic stretched film as described above. When used in combination with, the pressure-sensitive adhesive layer on the retardation plate film and the pressure-sensitive adhesive layer on the polarizing plate film will be bonded.
したがって疎水性延伸フィルムと偏光板フィルムとの間
で、良好な接着特性が得られるようになる。Therefore, good adhesive properties can be obtained between the hydrophobic stretched film and the polarizing plate film.
実施例 次に、本発明を実施例によって説明する。Example Next, the present invention will be explained by examples.
実施例１（位相差板の作成）
位相差板フィルムとして、ポリカーボネートフィルム（
ビスフェノールＡの炭酸エステル重合体フィルム）を延
伸して得た厚さ７０ｍの延伸フィルムを使用し、その両
面に、ブチルアクリレートを主成分とし、官能基として
カルボン酸基及び水酸基を有するアクリル系接着剤を膜
厚２０圃になるように塗布し、常温で乾燥して、両面に
感圧接着剤層を設けてなる位相差板を作成した。なお、
感圧接着剤層の上には、保護のために剥離紙を貼着した
。Example 1 (Creation of retardation plate) A polycarbonate film (
A stretched film with a thickness of 70 m obtained by stretching a bisphenol A carbonate ester polymer film) was used, and an acrylic adhesive containing butyl acrylate as a main component and having carboxylic acid groups and hydroxyl groups as functional groups was applied to both sides of the stretched film. was applied to a film thickness of 20 cm, dried at room temperature, and a retardation plate having pressure-sensitive adhesive layers on both sides was prepared. In addition,
A release paper was pasted on the pressure sensitive adhesive layer for protection.
実施例２（偏光板複合体の作成）
セルローストリアセテート／ポリビニルアルコール／セ
ルローストリアセテートの三層構造よりなる膜厚１８０
ｆｌの偏光板フィルムの一面に、ブチルアクリレート
を主成分とし、官能基としてカルボン酸基及び水酸基を
有するアクリル系接着剤よりなる膜厚２５頭の感圧接着
剤層を設けたものを、偏光板として使用した。Example 2 (Creation of polarizing plate composite) Three-layer structure of cellulose triacetate/polyvinyl alcohol/cellulose triacetate, film thickness 180
A 25-layer pressure-sensitive adhesive layer made of an acrylic adhesive containing butyl acrylate as a main component and having a carboxylic acid group and a hydroxyl group as functional groups is provided on one side of the fl polarizing plate film. used as.
上記の偏光板と、実施例１において作成された位相差板
とを用いて偏光板複合体を作成した。すなわち、偏光板
の感圧接着剤層と、位相差板の一方の感圧接着剤層とが
互いに対向するように重ね合わせ、常温常湿の下で卓上
ラミネーターで貼着した後、オートクレーブにおいて、
圧力５ ｋｇ ／ −の下で２０分間加圧した。A polarizing plate composite was created using the above polarizing plate and the retardation plate created in Example 1. That is, the pressure-sensitive adhesive layer of the polarizing plate and the pressure-sensitive adhesive layer of one of the retardation plates are overlapped so as to face each other, and after being attached using a tabletop laminator at room temperature and humidity, in an autoclave,
Pressure was applied for 20 minutes under a pressure of 5 kg/-.
試験例
試験試料として次の３つを用意しな、第７図はそれら試
験試料の模式的断面図を示すもので、（ａ）は試験試料
１、（ｂ）は試験試料２、（ｃ）は試験試料３を示す、
なお第７図中、６はソーダガラス板であり、他の符号は
前記と同じものを意味する。Test Example Prepare the following three test samples. Figure 7 shows a schematic cross-sectional view of these test samples, (a) is test sample 1, (b) is test sample 2, (c) indicates test sample 3,
In FIG. 7, 6 is a soda glass plate, and other symbols have the same meanings as above.
試験試料１
実施例２の偏光板複合体を、厚さ２止のソーダガラス板
に貼りつけた。Test Sample 1 The polarizing plate composite of Example 2 was attached to a soda glass plate with a thickness of 2 mm.
試験試料２（比較試料）
実施例１と同様の位相差板フィルム及び感圧接着側を用
いて、位相差板フィルムの一面にのみ感圧接着剤層を設
け、これを厚さ２ｆｉのソーダガラス板に貼着した。そ
の後、実施例２におけると同様の偏光板を位相差板フィ
ルムの上に貼着した。Test sample 2 (comparative sample) Using the same retardation film and pressure-sensitive adhesive side as in Example 1, a pressure-sensitive adhesive layer was provided only on one side of the retardation film, and this was attached to a 2fi thick soda glass layer. Pasted on the board. Thereafter, a polarizing plate similar to that in Example 2 was adhered onto the retardation film.
試験試料３（比較試料）
実施例１の位相差板を、厚さ２市のソーダガラス板に積
層し、貼着した後、位相差板の上にセルローストリアセ
テート／ポリビニルアルコール／セルローストリアセテ
ートの三層構造よりなる膜厚１８０矧の偏光板フィルム
を重ね、貼着した。Test sample 3 (comparative sample) After laminating and pasting the retardation plate of Example 1 on a soda glass plate with a thickness of 2 cm, three layers of cellulose triacetate/polyvinyl alcohol/cellulose triacetate were placed on the retardation plate. Polarizing plate films having a thickness of 180 mm and having a structure were stacked and adhered.
なお、上記の試験試料において、貼着の操作は、実施例
２で示したと同様にして行った。すなわち、常軌常温常
温の下で卓上ラミネーターで貼り合わせた後、オートク
レーブにおいて、圧力５ｋｚ／ａｄの下で２０分間加圧
することによって行った。In addition, in the above test sample, the pasting operation was performed in the same manner as shown in Example 2. That is, after bonding with a tabletop laminator at normal temperature and normal temperature, the bonding was carried out by pressurizing in an autoclave at a pressure of 5 kHz/ad for 20 minutes.
上記の各試験試料を（Ａ）７０℃の乾燥状態で２４０時
間、及び（Ｂ ） ６０℃、９０％ＲＨの下で２４０時
間保持した後、偏光板フィルムと位相差板フィルムとの
間の感圧接着剤層の状態を目視により評価した。結果を
第１表に示す。After holding each of the above test samples (A) in a dry state at 70°C for 240 hours and (B) at 60°C and 90% RH for 240 hours, the sensitivity between the polarizing plate film and the retardation plate film was measured. The condition of the pressure adhesive layer was visually evaluated. The results are shown in Table 1.
第１表
位相差板と偏光板とを組み合わせて作製された本発明の
偏光板複合体を用いて液晶ディスプレイを作製した場合
、高温高湿の条件下においても、位相差板と偏光板との
間の貼着部分で泡或いは剥がれを発生することがない。Table 1 When a liquid crystal display is manufactured using the polarizing plate composite of the present invention manufactured by combining a retardation plate and a polarizing plate, even under high temperature and high humidity conditions, the retardation plate and polarizing plate are No bubbles or peeling will occur at the adhesive part between the two.
発明の効果
本発明の位相差板は、上記のように疎水性延伸フィルム
よりなる位相差板フィルムの両面に感圧接着剤層を設け
てなるから、これを感圧接着剤層が設けられた偏光板と
組み合わせて使用した場合、優れた接着特性を示し、し
たがづてまな、これ等Effects of the Invention The retardation plate of the present invention is formed by providing a pressure-sensitive adhesive layer on both sides of a retardation film made of a hydrophobic stretched film as described above. When used in combination with polarizers, it exhibits excellent adhesive properties and is therefore highly adhesive, such as
第１図は本発明の液晶ディスプレイ用位相差板の模式的
断面図、第２図は本発明の液晶ディスプレイ用偏光板複
合体の模式的断面図、第３図は偏光板の模式的断面図、
第４図は本発明の液晶ディスプレイ用位相差板又は偏光
板複合体が使用された状態を示す模式的断面図、第５図
及び第６図はそれぞれ液晶ディスプレイの模式的断面図
、第７図（ａ＞、＜ｂ＞及び（ｃ）は、それぞれ実施例
で使用する試験試料の模式的断面図である。
１・・・位相差板フィルム、２・・・偏光板フィルム、
３ａ、３ｂ、３Ｃ−・・感圧接着剤層、４ａ、４ｂ、４
Ｃ−・・剥離フィルム、５・・・液晶セル、６・・・
ソーダガラス板。
第１図
第４図
（ａ）
第２図
第５図
（ｂ）
第６図
（Ｃ，）
第７図FIG. 1 is a schematic cross-sectional view of a retardation plate for a liquid crystal display of the present invention, FIG. 2 is a schematic cross-sectional view of a polarizing plate composite for a liquid crystal display of the present invention, and FIG. 3 is a schematic cross-sectional view of a polarizing plate. ,
FIG. 4 is a schematic cross-sectional view showing a state in which the retardation plate or polarizing plate composite for a liquid crystal display of the present invention is used, FIGS. 5 and 6 are schematic cross-sectional views of a liquid crystal display, respectively, and FIG. (a>, <b> and (c) are schematic cross-sectional views of test samples used in Examples, respectively. 1... Retardation plate film, 2... Polarizing plate film,
3a, 3b, 3C--Pressure sensitive adhesive layer, 4a, 4b, 4
C-...Peeling film, 5...Liquid crystal cell, 6...
Soda glass plate. Figure 1 Figure 4 (a) Figure 2 Figure 5 (b) Figure 6 (C,) Figure 7
Claims (2)
に、感圧接着剤層を設けたことを特徴とする液晶ディス
プレイ用位相差板。(1) A retardation plate for a liquid crystal display, characterized in that a pressure-sensitive adhesive layer is provided on both sides of a stretched film made of hydrophobic plastic.
に感圧接着剤層を設けてなる位相差板の一面に、偏光板
フィルム上に感圧接着剤層を設けてなる偏光板を、該偏
光板の感圧接着剤層と位相差板の感圧接着剤層とが対向
するように貼着してなることを特徴とする液晶ディスプ
レイ用偏光板複合体。(2) A polarizing plate formed by providing a pressure-sensitive adhesive layer on a polarizing plate film is placed on one side of a retardation plate formed by providing a pressure-sensitive adhesive layer on both sides of a stretched film made of hydrophobic plastic. 1. A polarizing plate composite for a liquid crystal display, characterized in that the pressure-sensitive adhesive layer of and the pressure-sensitive adhesive layer of a retardation plate are attached so as to face each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1016408A JPH02197819A (en) | 1989-01-27 | 1989-01-27 | Phase difference plate and polarizing plate composite for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1016408A JPH02197819A (en) | 1989-01-27 | 1989-01-27 | Phase difference plate and polarizing plate composite for liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02197819A true JPH02197819A (en) | 1990-08-06 |
Family
ID=11915415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1016408A Pending JPH02197819A (en) | 1989-01-27 | 1989-01-27 | Phase difference plate and polarizing plate composite for liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02197819A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04347802A (en) * | 1991-05-24 | 1992-12-03 | Tomoegawa Paper Co Ltd | Phase difference plate for liquid crystal display and polarizing plate composite |
| JPH09189906A (en) * | 1996-01-09 | 1997-07-22 | Nitto Denko Corp | Optical film and liquid crystal display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195208A (en) * | 1981-05-25 | 1982-11-30 | Nitto Electric Ind Co Ltd | Pressure-sensitive adhesive type polarizing plate |
| JPS582823A (en) * | 1981-06-29 | 1983-01-08 | Tomoegawa Paper Co Ltd | Color liquid-crystal display body |
| JPS63271424A (en) * | 1987-04-30 | 1988-11-09 | Seiko Epson Corp | Color liquid crystal display device |
-
1989
- 1989-01-27 JP JP1016408A patent/JPH02197819A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195208A (en) * | 1981-05-25 | 1982-11-30 | Nitto Electric Ind Co Ltd | Pressure-sensitive adhesive type polarizing plate |
| JPS582823A (en) * | 1981-06-29 | 1983-01-08 | Tomoegawa Paper Co Ltd | Color liquid-crystal display body |
| JPS63271424A (en) * | 1987-04-30 | 1988-11-09 | Seiko Epson Corp | Color liquid crystal display device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04347802A (en) * | 1991-05-24 | 1992-12-03 | Tomoegawa Paper Co Ltd | Phase difference plate for liquid crystal display and polarizing plate composite |
| JPH09189906A (en) * | 1996-01-09 | 1997-07-22 | Nitto Denko Corp | Optical film and liquid crystal display device |
| KR100444412B1 (en) * | 1996-01-09 | 2004-11-08 | 닛토덴코 가부시키가이샤 | Optical film and liquid crystal display device |
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