JPH02242225A - Electro-optical liquid crystal device - Google Patents
Electro-optical liquid crystal deviceInfo
- Publication number
- JPH02242225A JPH02242225A JP1062610A JP6261089A JPH02242225A JP H02242225 A JPH02242225 A JP H02242225A JP 1062610 A JP1062610 A JP 1062610A JP 6261089 A JP6261089 A JP 6261089A JP H02242225 A JPH02242225 A JP H02242225A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- sheet
- liq
- thermoplastic resin
- film
- 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 description 36
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 12
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 5
- 230000009477 glass transition Effects 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 6
- 210000004027 cell Anatomy 0.000 claims description 5
- 229920001721 polyimide Polymers 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract 5
- 230000000007 visual effect Effects 0.000 abstract 5
- 229920005989 resin Polymers 0.000 abstract 2
- 239000011347 resin Substances 0.000 abstract 2
- 239000009719 polyimide resin Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 229920006393 polyether sulfone Polymers 0.000 description 3
- 239000004695 Polyether sulfone Substances 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野１
本発明は複屈折効果を利用する液晶電気光学素子に関し
、更に詳しくは、視野角を広げる視角補償板を含む液晶
セルに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a liquid crystal electro-optical device that utilizes the birefringence effect, and more particularly to a liquid crystal cell that includes a viewing angle compensator that widens the viewing angle.
〔従来の技術１
電気制御複屈折効果を利用した液晶セルであって、ホメ
オトロピック配向した液晶を２枚の電極基板間に挟持し
てなる液晶電気光学素子の視角範囲を広げる方法として
は、光学異方体膜である視角補償板を該液晶電気光学素
子に適応する方法がある。これについては、特願昭６２
−２１０４２３に詳しく開示されている。すなわち、光
学異方体膜はその３つの主要な屈折率Ｎ１０、Ｎ２゜、
Ｎ、。[Prior art 1] As a method for widening the viewing angle range of a liquid crystal electro-optical element, which is a liquid crystal cell that utilizes the electrically controlled birefringence effect and is made by sandwiching homeotropically aligned liquid crystal between two electrode substrates, there is an optical There is a method of applying a viewing angle compensation plate, which is an anisotropic film, to the liquid crystal electro-optical element. Regarding this, the special application
-210423. In other words, the optically anisotropic film has three main refractive indices: N10, N2°,
N.
の内、Ｎ３．が他の２つの屈折率ＮＩＱ、Ｎ２Ｑ、より
も小さく、かつＮ、。とＮ２゜が同値であり、さらにＮ
ｓｏに対応する軸が光学異方体膜の面に垂直方向に有
るものである。また、Ｎ ｉｓ軸を液晶のホメオトロピ
ック方向と平行にしこの光学異方体膜を液晶セルに、第
２図に示したように配置することによって、視野角の変
化に対応して起こる液晶の△ｎの変化をキャンセルする
ことで視野を広げる作用を発するものである。ここで、
−膜内な上記の光学異方体膜の作成方法を説明する。特
願昭６２−２１０４２３に開示されている方法は次の方
法である。Among them, N3. is smaller than the other two refractive indices NIQ, N2Q, and N,. and N2° are the same value, and furthermore, N
The axis corresponding to so is perpendicular to the plane of the optically anisotropic film. In addition, by arranging this optically anisotropic film in a liquid crystal cell with the N is axis parallel to the homeotropic direction of the liquid crystal as shown in Figure 2, it is possible to reduce the It has the effect of widening the field of view by canceling the change in n. here,
- A method for creating the above-mentioned optically anisotropic film within the film will be explained. The method disclosed in Japanese Patent Application No. 62-210423 is as follows.
Ｄｕｐｏｎ ｄｅ Ｎｅｍｏｕｒｓ社の商品名である５
ＵＲＬＹＮや、Ｒｈｏｎｅ Ｐｏｕｌｅｎｃ社から発売
されているセロハンシート等の熱可塑性フィルムを透明
基板中に挟み、透明基板の上下方向から均一な圧力を掛
け、加熱することによりガラス質の相から等方性の相に
進むまで加圧状態を保持し、等方性になれば加熱を停止
し、圧力を除去するという連続した工程からなるもので
ある。このようにして、膜面に垂直な方向の屈折率が、
膜面方向の屈折率より小さい負の複屈折性を示す光学異
方体を作成することができる。5, which is the product name of Dupon de Nemours.
A thermoplastic film such as URLYN or cellophane sheet sold by Rhone Poulenc is sandwiched between transparent substrates, and by applying uniform pressure from above and below the transparent substrate and heating, the glassy phase is converted into an isotropic phase. It consists of a series of steps in which the pressurized state is maintained until it reaches the phase, and when it becomes isotropic, heating is stopped and the pressure is removed. In this way, the refractive index in the direction perpendicular to the film surface is
It is possible to create an optically anisotropic body that exhibits negative birefringence that is smaller than the refractive index in the film surface direction.
従来の視角補償板を含む液晶電気光学素子は、上記のよ
うにして得られた視角補償板を、第２図に示すようにホ
メオトロピック配向した液晶セルに重ねて配置すること
によって視角の広い液晶電気光学素子を提供していた。A conventional liquid crystal electro-optical device including a viewing angle compensator is produced by placing the viewing angle compensator obtained as described above on top of a homeotropically aligned liquid crystal cell as shown in FIG. Provided electro-optical devices.
〔発明が解決しようとする課題１
しかし、前述の従来技術に於いては、視角補償板の作製
に透明基板を要し、２枚の透明基板に保持された光学異
方体膜を従来の液晶電気光学セルに追加して設けなくて
はいけないので、液晶電気光学セル全体の重さや厚みが
極端に大きくなり、液晶電気光学素子の長所である軽量
薄型というメノットがなくなるという欠点を有している
そこで本発明はこのような問題点を解決するもので、そ
の目的とするところは、視角補償板を含む液晶電気光学
素子を薄型軽量で提供するところにある。[Problem to be Solved by the Invention 1] However, in the above-mentioned conventional technology, a transparent substrate is required for producing the viewing angle compensation plate, and the optically anisotropic film held on two transparent substrates is used as a conventional liquid crystal display. Since it has to be provided in addition to the electro-optic cell, the weight and thickness of the entire liquid crystal electro-optic cell become extremely large, which has the disadvantage that the advantages of liquid crystal electro-optic elements, such as being lightweight and thin, are lost. SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and an object of the present invention is to provide a thin and lightweight liquid crystal electro-optical element including a viewing angle compensation plate.
〔課題を解決するための手段］
本発明の電気光学素子は、電気制御複屈折効果を利用し
た液晶セルであって、対向する２枚の電極基板間にホメ
オトロピック配向した液晶を挟持してなる液晶セルと、
それらを挟んで両側に配置された一対の偏光板とを具備
した液晶電気光学素子に於て、２枚の電極基板の内掛な
くとも１枚の電極基板が熱可塑性樹脂の板からなり、そ
の熱可塑性樹脂板は、光軸が板面に垂直方向で、液晶の
ホメオトロピック方向と平行方向に有り、光学的に負の
一軸性を有することを特徴とする。[Means for Solving the Problems] The electro-optical element of the present invention is a liquid crystal cell that utilizes an electrically controlled birefringence effect, and includes a homeotropically aligned liquid crystal sandwiched between two opposing electrode substrates. liquid crystal cell,
In a liquid crystal electro-optical device equipped with a pair of polarizing plates placed on both sides of the polarizing plates, at least one of the two electrode substrates is made of a thermoplastic resin plate; The thermoplastic resin plate is characterized in that its optical axis is perpendicular to the plate surface, parallel to the homeotropic direction of the liquid crystal, and has optically negative uniaxiality.
また、前記熱可塑性樹脂板についてはガラス転移温度が
１５０℃以上であることが望まれる。というのは、熱可
塑性樹脂板は液晶基板になるのであるから、板上に透明
導電膜（ＩＴＯ）や配向膜であるポリイミド膜をコーテ
ィングする必要がありその際の熱処理に１５０℃程度の
加熱プロセスがあるからである。Further, it is desired that the thermoplastic resin plate has a glass transition temperature of 150° C. or higher. This is because the thermoplastic resin plate will be used as a liquid crystal substrate, so it is necessary to coat the plate with a transparent conductive film (ITO) and a polyimide film as an alignment film, which requires a heating process of about 150°C. This is because there is.
本発明の上記の構成によれば、高耐熱性の熱可塑性フィ
ルムを、視角補償板および液晶セルの透明基板の双方に
兼ねることによって、液晶電気光学素子の軽量薄型化を
図ることができるものである。According to the above structure of the present invention, by using the highly heat-resistant thermoplastic film as both the viewing angle compensator and the transparent substrate of the liquid crystal cell, it is possible to make the liquid crystal electro-optical element lighter and thinner. be.
〔実 施 例］ 以下に実施例で更に詳しく説明する。〔Example] This will be explained in more detail in Examples below.
実施例１゜ 本発明の１実施態様を示す概略図を、第１図に示す。Example 1゜ A schematic diagram illustrating one embodiment of the invention is shown in FIG.
光学異方体膜である視角補償板２．を以下のようにして
作成した。膜厚１００μｍのポリエーテルサルフオン（
Ｔｇ、、＝２２３℃）のフィルムの袋を用意した。この
袋の中に水を入れ袋の口を閉じ密閉した。この状態で温
度を２３０℃に上げた。Viewing angle compensation plate which is an optically anisotropic film 2. was created as follows. Polyethersulfon (100 μm thick)
A film bag with a temperature Tg of 223°C was prepared. Water was poured into this bag and the mouth of the bag was closed and sealed. In this state, the temperature was raised to 230°C.
袋内の水はガス化し高温になることで圧力が上がり、さ
らにポリエーテルサルフオンのガラス転移温度より高温
であるのでフィルムはゴム状になっているので均一に膨
らんだ、これによってポリエーテルサルフォンは膜面方
向に均一に等方的に延伸された。続いてこの膨張状態を
保ったまま冷却し室温まで冷やした。このフィルムは膜
面方向の屈折率と膜厚方向の屈折率の差は△ｎ−ｄ＝０
９であった。The water in the bag gasifies and becomes high temperature, which increases the pressure.Furthermore, since the temperature is higher than the glass transition temperature of polyether sulfone, the film becomes rubbery and swells uniformly.This causes polyether sulfone to swell. was stretched uniformly and isotropically in the film surface direction. Subsequently, it was cooled to room temperature while maintaining this expanded state. In this film, the difference between the refractive index in the film plane direction and the refractive index in the film thickness direction is △n-d=0
It was 9.
このフィルムの上に透明導電膜（ＩＴＯ）５を形成し、
次にポリイミドによる配向膜４．を形成し垂直配向処理
をした。一方垂直配向処理及び透明導電膜を形成したガ
ラス基板を用意し、前記フィルムと組み合わせて、垂直
配向液晶セルを作成した。セル中にビフェニール系液晶
（Δｎ＝０．１５）を入れそれらの両側に偏光板をクロ
スニフルにして配置した。A transparent conductive film (ITO) 5 is formed on this film,
Next, an alignment film 4 made of polyimide. was formed and subjected to vertical alignment treatment. On the other hand, a glass substrate that had been subjected to vertical alignment treatment and a transparent conductive film was prepared, and was combined with the film to create a vertically aligned liquid crystal cell. A biphenyl-based liquid crystal (Δn=0.15) was placed in the cell, and polarizing plates were placed on both sides of the cell in a crossed-niffle manner.
得られた液晶電気光学素子は、視角がたいへん広く、軽
量で、薄型の液晶電気光学素子になった。The obtained liquid crystal electro-optical device has a very wide viewing angle, is lightweight, and is thin.
〔発明の効果１
以上述べたように、本発明によれば、２枚の電極基板の
内掛なくとも１枚の電極基板が熱可塑性樹脂の板からな
り、その熱可塑性樹脂板は、光軸が板面に垂直方向で、
液晶のホメオトロピック方向と平行方向に有り、光学的
に負の一軸性を有するものとすることによって、視角の
広い、薄型で軽量の液晶電気光学素子を提供することが
できる効果を有する。[Effect of the invention 1] As described above, according to the present invention, at least one of the two electrode substrates is made of a thermoplastic resin plate, and the thermoplastic resin plate is aligned with the optical axis. is perpendicular to the board surface,
By making it parallel to the homeotropic direction of the liquid crystal and having optically negative uniaxiality, it is possible to provide a thin and lightweight liquid crystal electro-optical element with a wide viewing angle.
Claims (1)
対向する２枚の電極基板間にホメオトロピック配向した
液晶を挟持してなる液晶セルと、それらを挟んで両側に
配置された一対の偏光板とを具備した液晶電気光学素子
に於て、前記２枚の電極基板の内少なくとも１枚の電極
基板が熱可塑性樹脂の板からなり、その熱可塑性樹脂板
は、光軸が板面に垂直方向で、液晶のホメオトロピック
方向と平行方向に有り、光学的に負の一軸性を有するこ
とを特徴とする液晶電気光学素子。 ２）前記熱可塑性樹脂板のガラス転移温度が１５０℃以
上であることを特徴とする請求項１記載の液晶電気光学
素子。[Claims] 1) A liquid crystal cell utilizing electrically controlled birefringence effect, comprising:
In the liquid crystal electro-optical element, the liquid crystal electro-optical element includes a liquid crystal cell having a homeotropically aligned liquid crystal sandwiched between two electrode substrates facing each other, and a pair of polarizing plates disposed on both sides of the cell. At least one of the electrode substrates is made of a thermoplastic resin plate, and the thermoplastic resin plate has an optical axis perpendicular to the plate surface and parallel to the homeotropic direction of the liquid crystal. A liquid crystal electro-optical element characterized by having negative uniaxiality. 2) The liquid crystal electro-optical element according to claim 1, wherein the thermoplastic resin plate has a glass transition temperature of 150° C. or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1062610A JPH02242225A (en) | 1989-03-15 | 1989-03-15 | Electro-optical liquid crystal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1062610A JPH02242225A (en) | 1989-03-15 | 1989-03-15 | Electro-optical liquid crystal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02242225A true JPH02242225A (en) | 1990-09-26 |
Family
ID=13205256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1062610A Pending JPH02242225A (en) | 1989-03-15 | 1989-03-15 | Electro-optical liquid crystal device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02242225A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05113561A (en) * | 1991-10-21 | 1993-05-07 | Stanley Electric Co Ltd | Perpendicular orientation type liquid crystal display device |
| JPH06294961A (en) * | 1993-02-10 | 1994-10-21 | Stanley Electric Co Ltd | Liquid crystal display element and its production |
| US6281956B1 (en) | 1996-09-30 | 2001-08-28 | Fujitsu Limited | Liquid crystal display device operating in a vertically aligned mode |
| WO2004053579A1 (en) * | 2002-12-12 | 2004-06-24 | Sharp Kabushiki Kaisha | Plastic substrate and liquid crystal display having same |
| US7760299B2 (en) | 2002-07-12 | 2010-07-20 | Samsung Electronics Co., Ltd. | Vertically aligned liquid crystal display device having an optimized viewing angle |
-
1989
- 1989-03-15 JP JP1062610A patent/JPH02242225A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05113561A (en) * | 1991-10-21 | 1993-05-07 | Stanley Electric Co Ltd | Perpendicular orientation type liquid crystal display device |
| JPH06294961A (en) * | 1993-02-10 | 1994-10-21 | Stanley Electric Co Ltd | Liquid crystal display element and its production |
| US6281956B1 (en) | 1996-09-30 | 2001-08-28 | Fujitsu Limited | Liquid crystal display device operating in a vertically aligned mode |
| US6642981B1 (en) | 1996-09-30 | 2003-11-04 | Fujitsu Display Technologies Corporation | Liquid crystal display device operating in a vertically aligned mode including at least one retardation film |
| US7075609B2 (en) | 1996-09-30 | 2006-07-11 | Sharp Kabushiki Kaisha | Liquid crystal display device comprising p-type liquid crystal layer operating in vertically aligned mode including first and second retardation films |
| US7379140B2 (en) | 1996-09-30 | 2008-05-27 | Sharp Kabushiki Kaisha | Liquid crystal display device operating in a vertically aligned mode comprising an optically biaxial retardation film |
| US7548294B2 (en) | 1996-09-30 | 2009-06-16 | Sharp Kabushiki Kaisha | Liquid crystal display device operating in a vertically aligned mode |
| US7808592B2 (en) | 1996-09-30 | 2010-10-05 | Sharp Kabushiki Kaisha | Liquid crystal display device operating in a vertical aligned mode having particular optical biaxial retardation film |
| US7995175B2 (en) | 1996-09-30 | 2011-08-09 | Sharp Kabushiki Kaisha | Liquid crystal display device |
| US7760299B2 (en) | 2002-07-12 | 2010-07-20 | Samsung Electronics Co., Ltd. | Vertically aligned liquid crystal display device having an optimized viewing angle |
| WO2004053579A1 (en) * | 2002-12-12 | 2004-06-24 | Sharp Kabushiki Kaisha | Plastic substrate and liquid crystal display having same |
| US7794803B2 (en) | 2002-12-12 | 2010-09-14 | Sharp Kabushiki Kaisha | Plastic substrate and liquid crystal display having same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH07104450B2 (en) | Biaxial optical element and manufacturing method thereof | |
| JPS62210423A (en) | Liquid crystal cell utilizing electric control double refraction effect and making of the same and negative optical anisotropic single axis medium use therefor | |
| CN108983515B (en) | Liquid crystal display device, preparation method thereof and display device | |
| JP2933261B2 (en) | Liquid crystal display | |
| CN105629543B (en) | A kind of flexible liquid crystal panel and display device | |
| JPH02242225A (en) | Electro-optical liquid crystal device | |
| JPH02250031A (en) | Liquid crystal display element | |
| JP2003015134A (en) | Liquid crystal display device | |
| JP2000338489A (en) | Liquid crystal display device | |
| JP2002040434A (en) | Liquid crystal display device having surface grating film on which multiple alignment array of axially symmetric two-dimensional surface grating is formed | |
| JPH01209424A (en) | Liquid crystal electrooptic device | |
| JPH02190825A (en) | Liquid crystal electro-optical element | |
| JP2000066208A (en) | Parallel aligned liquid crystal display element and its production | |
| JPH04104124A (en) | Liquid crystal electrooptic device | |
| JPH0194318A (en) | Liquid crystal display element | |
| EP0952469A1 (en) | Optical anisotropic device | |
| JPH02230215A (en) | Liquid crystal electrooptical element | |
| JP2789595B2 (en) | Liquid crystal electro-optical element | |
| KR100224744B1 (en) | Dstn mode lcd and method of compensating the phase difference | |
| JPS6432229A (en) | Liquid crystal display element having plastic substrate | |
| JPH02306217A (en) | Liquid crystal electrooptical element | |
| JPH02242223A (en) | Production of electro-optical liquid crystal device | |
| JPS62159116A (en) | Liquid crystal display element with plastic substrate | |
| KR940009131B1 (en) | Film compensated light phase | |
| JPH02308219A (en) | Liquid crystal electrooptical element |