JPH02203319A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH02203319A JPH02203319A JP2307989A JP2307989A JPH02203319A JP H02203319 A JPH02203319 A JP H02203319A JP 2307989 A JP2307989 A JP 2307989A JP 2307989 A JP2307989 A JP 2307989A JP H02203319 A JPH02203319 A JP H02203319A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display device
- binder
- crystal layer
- crystal display
- 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 103
- 239000011230 binding agent Substances 0.000 claims abstract description 24
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 9
- 239000004988 Nematic liquid crystal Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 abstract description 23
- 239000003085 diluting agent Substances 0.000 abstract description 6
- 239000003999 initiator Substances 0.000 abstract description 5
- 239000002861 polymer material Substances 0.000 abstract description 4
- 239000000654 additive Substances 0.000 abstract description 3
- 239000003504 photosensitizing agent Substances 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 2
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 abstract 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000002834 transmittance Methods 0.000 description 8
- 229920002799 BoPET Polymers 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000011282 treatment Methods 0.000 description 6
- 230000005684 electric field Effects 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- -1 )4EK Chemical compound 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- PIZHFBODNLEQBL-UHFFFAOYSA-N 2,2-diethoxy-1-phenylethanone Chemical compound CCOC(OCC)C(=O)C1=CC=CC=C1 PIZHFBODNLEQBL-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 229960002130 benzoin Drugs 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 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
- 229920003169 water-soluble polymer Polymers 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、紫外線等の照射により液晶層を形成し得る液
晶表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a liquid crystal display device in which a liquid crystal layer can be formed by irradiation with ultraviolet rays or the like.
（従来の技術）
従来、この種の液晶表示装置に関して、以下の（１）〜
（３）に示す技術が開示されている。(Prior Art) Conventionally, regarding this type of liquid crystal display device, the following (1) to
The technique shown in (3) has been disclosed.
（１）正の誘電率異方性を有するネマチック型液晶を、
水溶性高分子材料く例えば、ＰＶＡ、ゼラチン）で粒径
５μ冒前後にカプセル化して液晶層を形成し、この液晶
層を導電層間に設けた液晶表示装置（特許公表昭５８−
５０１６３１号公報）。(1) Nematic liquid crystal with positive dielectric constant anisotropy,
A liquid crystal display device (patent publication 1983-1983) in which a liquid crystal layer is formed by encapsulating a water-soluble polymer material (e.g., PVA, gelatin) with a particle size of around 5 μm, and this liquid crystal layer is provided between conductive layers.
501631).
上記構成の液晶表示装置によれば、液晶層に電圧が印加
されていない時には、液晶カプセル周辺の水溶液高分子
材料の屈折率（ｎｐ）と、液晶の屈折率との差によって
入射光が散乱するために液晶層はくもり状態となり、ま
た液晶層に電圧が印加されると液晶がその電場方向に向
かって整列するために、高分子材料の屈折率（ｎｐ）と
液晶の常光屈折率（ｎｏ）とがほぼ同じになることで液
晶層が透明になる。この公報に開示された液晶表示装置
において、カプセル化は、液晶分子を歪ませて光の散乱
を増長する手段である。According to the liquid crystal display device having the above configuration, when no voltage is applied to the liquid crystal layer, incident light is scattered due to the difference between the refractive index (np) of the aqueous polymer material around the liquid crystal capsule and the refractive index of the liquid crystal. Therefore, the liquid crystal layer becomes cloudy, and when a voltage is applied to the liquid crystal layer, the liquid crystals align in the direction of the electric field, so the refractive index of the polymer material (np) and the ordinary refractive index of the liquid crystal (no) When they become almost the same, the liquid crystal layer becomes transparent. In the liquid crystal display device disclosed in this publication, encapsulation is a means of distorting liquid crystal molecules to increase light scattering.
（２）天然ゴムまたは合成ポリマーのラテックス粒子の
サスペンションと、水相に予めエマルジヨン化された液
晶とを混合することにより、液晶をカプセル化する（特
開昭６２−４８７８９号公報）。(2) Liquid crystal is encapsulated by mixing a suspension of latex particles of natural rubber or synthetic polymer with liquid crystal that has been emulsified in advance in an aqueous phase (Japanese Patent Laid-Open No. 62-48789).
この技術においても電場のオン、オフによって液晶相は
透明または不透明に変化する。In this technology as well, the liquid crystal phase changes from transparent to opaque depending on whether the electric field is turned on or off.
（３）液晶と、この液晶と相溶しない非水溶液高分子物
質よりなる組成物を有機溶剤に溶解させ、これを透明電
極基板上に塗工することにより、皮膜を形成させる技術
（特開昭６３−４３９９３号公報）。(3) Technology to form a film by dissolving a composition consisting of a liquid crystal and a non-aqueous polymeric substance that is incompatible with the liquid crystal in an organic solvent and coating it on a transparent electrode substrate (Japanese Patent Laid-Open No. 63-43993).
この技術によっても、電場のオン、オフによって透明状
態と不透明状態とを切り換えることができる。This technique also allows switching between a transparent state and an opaque state by turning on and off an electric field.
（発明が解決しようとする課題）
上記（１）及び（２）の構成では、液晶相に用いたポリ
マーが本質的に水溶性であるため、ポリマー相が吸湿し
易い、従って、電圧を印加すると、電流がリークし、液
晶表示装置が駆動しなくなり、信頼性、特に耐湿性に劣
っている。しかも、ポリマー／液晶の分散フィルムを形
成しても、ポリマー自体が親水性であるため、導電層の
導電面との接着性が弱く、分散フィルムと導電面間に剥
離を生じることにより、液晶表示装置が駆動しなくなる
。(Problems to be Solved by the Invention) In the configurations (1) and (2) above, since the polymer used for the liquid crystal phase is essentially water-soluble, the polymer phase easily absorbs moisture. , current leaks, the liquid crystal display device stops driving, and reliability, especially moisture resistance, is poor. Moreover, even if a polymer/liquid crystal dispersion film is formed, since the polymer itself is hydrophilic, its adhesion to the conductive surface of the conductive layer is weak, resulting in peeling between the dispersion film and the conductive surface, which can cause problems in the liquid crystal display. The device stops operating.
また、この液晶表示装置を製造する際には、液晶をポリ
マー水溶液に分散した後、このものを機械的（例えば、
コロイドミルを使用）に分散させて、粒径５μ履前後の
液晶粒子をつくる必要があるので、操作が煩雑である。In addition, when manufacturing this liquid crystal display device, after dispersing the liquid crystal in a polymer aqueous solution, this material is mechanically (for example,
Since it is necessary to disperse the liquid crystal particles using a colloid mill (using a colloid mill) to produce liquid crystal particles with a particle size of approximately 5 μm, the operation is complicated.
上記（３）の構成では、有機溶剤に可溶な高分子材料を
使用しているために、耐湿性に優れており、また導電層
に対する接着性にも優れている。In the configuration (3) above, since a polymeric material soluble in an organic solvent is used, it has excellent moisture resistance and also has excellent adhesiveness to the conductive layer.
しかしながら、常温においては液晶と相溶しない高分子
材料を使用した場合においても、加熱時には液晶と若干
相溶していき、不透明状態が崩れる問題あるいは加熱時
の液晶の凝集等の問題を有している。However, even when using polymeric materials that are not compatible with liquid crystals at room temperature, they become slightly compatible with liquid crystals when heated, resulting in problems such as loss of opacity or aggregation of liquid crystals during heating. There is.
本発明は、上記欠点を解決するものであり、その目的は
、耐湿性、接着性、耐久性に優れ、信頼性が高く、なお
かつ比較的容易に製造することができ、電圧のオン、オ
フにより透明、不透明状態のコントロールが可能な液晶
表示装置を提供することにある。The present invention is intended to solve the above-mentioned drawbacks, and its purpose is to have excellent moisture resistance, adhesiveness, and durability, high reliability, and be relatively easy to manufacture, and to be able to be manufactured easily by turning on and off the voltage. An object of the present invention is to provide a liquid crystal display device that can control transparency and opacity.
（課題を解決するための手段）
本発明の液晶表示装置は、少なくとも一方が透明な導電
基板間に液晶層が設けられている液晶表示装置であって
、該液晶層が、正の誘電率異方性を有するネマチック型
液晶と、オリゴウレタンアクリレートを主成分として含
有するバインダーにより形成されてなり、そのことによ
り上記目的が達成される。(Means for Solving the Problems) The liquid crystal display device of the present invention is a liquid crystal display device in which a liquid crystal layer is provided between conductive substrates, at least one of which is transparent, and the liquid crystal layer has a positive dielectric constant difference. It is formed from a nematic type liquid crystal having orientation and a binder containing oligourethane acrylate as a main component, thereby achieving the above object.
すなわち、該液晶層は、オリゴウレタンアクリレートを
バインダー成分の主成分として含有するので、導電層と
の接着性が良好であり、また非水溶性であることから耐
湿性も良好であり、なおかつ後硬化等の処理により耐熱
性の向上を図ることが可能であることから、上記目的が
達成される。In other words, since the liquid crystal layer contains oligourethane acrylate as the main binder component, it has good adhesion with the conductive layer, and since it is water-insoluble, it has good moisture resistance, and it can be easily post-cured. Since it is possible to improve heat resistance by such treatments, the above object is achieved.
以下に、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明に係る液晶表示装置は、第１図に示すように、一
対の導電層１及び２の間に液晶層３を設けて構成されて
いる。各導電層１．２の少なくとも一方は透明に形成さ
れている。各導電層１．２は、透明基板１ａ、２ａの液
晶層３側の面に導電材ｉｂ、２ｂを全面に亘って被覆し
て形成され、両溝電層１．２の導電材１ｂ、２ｂ間にリ
ード線４が接続されている。そして、このリード線４に
電源５及びスイッチ６をそれぞれ介装し、スイッチ６を
オン、オフすることにより、液晶層３に適宜電場を生じ
させるように構成されている。The liquid crystal display device according to the present invention is constructed by providing a liquid crystal layer 3 between a pair of conductive layers 1 and 2, as shown in FIG. At least one of the conductive layers 1.2 is transparent. Each conductive layer 1.2 is formed by covering the entire surface of the transparent substrate 1a, 2a on the liquid crystal layer 3 side with a conductive material ib, 2b, and the conductive material 1b, 2b of the double groove conductive layer 1.2 is formed by covering the entire surface of the transparent substrate 1a, 2a on the liquid crystal layer 3 side. A lead wire 4 is connected between them. A power source 5 and a switch 6 are respectively interposed in this lead wire 4, and by turning the switch 6 on and off, an electric field is generated in the liquid crystal layer 3 as appropriate.
液晶層３は、液晶及びバインダーの混合物を紫外線ある
いは電子線等の照射で硬化させて形成され、この液晶混
合物は、正の誘電率異方性を有するネマチック型液晶と
、オリゴウレタンアクリレートを主成分として含有する
バインダーとからなるものである。The liquid crystal layer 3 is formed by curing a mixture of liquid crystal and a binder by irradiation with ultraviolet rays or electron beams, and this liquid crystal mixture mainly contains nematic liquid crystal having positive dielectric anisotropy and oligourethane acrylate. It consists of a binder containing as follows.
該液晶は、バインダー成分中に、いわゆる”相分離”状
態で分散されており、その孔径は０．０５〜５０μｍが
好ましく、より好ましくは１〜２０μｌである。このよ
うに、液晶層３は、ネマチック型液晶とバインダー成分
とが相分離した状態であるので、電場を生じていない状
態では白濁した不透明状態となっている。この相分離状
態のネマチック型液晶の孔径が大きいと良好な不透明状
態が得られず、また微細すぎると電圧印加時の透明性に
劣る、あるいは透明状態にするためには高い電圧を必要
とするなどの不具合を生じる。The liquid crystal is dispersed in the binder component in a so-called "phase-separated" state, and its pore size is preferably 0.05 to 50 μm, more preferably 1 to 20 μl. In this manner, the liquid crystal layer 3 is in a state where the nematic liquid crystal and the binder component are phase-separated, so that it is cloudy and opaque when no electric field is generated. If the pore size of this phase-separated nematic liquid crystal is large, it will not be possible to obtain a good opaque state, and if it is too small, the transparency will be poor when a voltage is applied, or a high voltage will be required to achieve a transparent state. This will cause problems.
本発明で用いられる液晶としては、例えばＬＩＸＯＮ−
４００２，６６３１，６６２７，９８２７，９８３９な
ど（チッソ社製）、ＺＬＩ−１６１２，１８４０，２ｔ
１６１．２１４３など（メルク社製）、Ｅ−７、ＩＥ−
８、Ｅ−１８など（ＢＤ［（社製）、Ｍ−６００８など
（ロブイック社製）が使用できる。As the liquid crystal used in the present invention, for example, LIXON-
4002, 6631, 6627, 9827, 9839 etc. (manufactured by Chisso Corporation), ZLI-1612, 1840, 2t
161.2143 etc. (manufactured by Merck), E-7, IE-
8, E-18, etc. (BD [(manufactured by Co., Ltd.), M-6008, etc. (manufactured by Robic Co., Ltd.) can be used.
上記バインダーは、高分子物質よりなる透明なバインダ
ー成分を含有し、また一般に光重合開始剤、光増感剤な
どの添加剤、反応性希釈剤、有機溶剤等を含有している
。バインダー成分は、それ自体透明であることが必要で
あり、その屈折率が液晶の常光屈折率とほとんど一致し
ているものが好ましい０本発明ではバインダー成分とし
てオリゴウレタンアクリレートを主成分とし、また他の
バインダー成分が含有されてもよい。バインダー成分の
主成分であるオリゴウレタンアクリレートは、例えば、
分子内にウレタン結合を有すると共に両末端に（メタ）
アクリレート成分を有するもので、バインダー組成物に
対して、２０〜８０重量％含有されるのが好ましい、こ
のオリゴウレタンアクリレートとしては、例えば以下の
ものがあげられる。The binder contains a transparent binder component made of a polymeric substance, and generally contains additives such as a photopolymerization initiator and a photosensitizer, a reactive diluent, an organic solvent, and the like. The binder component itself needs to be transparent, and it is preferable that its refractive index almost matches the ordinary light refractive index of the liquid crystal. A binder component may be included. Oligourethane acrylate, which is the main component of the binder component, is, for example,
It has a urethane bond in the molecule and (meta) at both ends.
Examples of the oligourethane acrylate, which contains an acrylate component and is preferably contained in an amount of 20 to 80% by weight based on the binder composition, include the following.
■ＵＡ−３１）６Ｈ１υＡ−３０６１，Ａｉ（−６００
など（共栄社油脂化学社製）
■タケラックＵＶ−６０Ｘ−６５０−Ｏ８，ＵＶ−６０
Ｘ２７ＮＳ、 ＵＶ−６０Ｘ−２７ＮＳ、 ＵＶ−９０
Ｘ−０２ＮＳ、 ＵＶ−９０Ｘ−０３ＮＳなど（武田ｆ
ｆｉ品社製）
■ＵＮ−９２０ＯＡ、 ＵＮ−５２００など（根土工業
社製）■ユニデイックＶ−４２２１．Ｖ−４３５０など
（大日本インキ化学社製）
■Ｕ−４ＨＡ、 Ｕ−６ＨＡなど（新中村化学ＩＪ社１
Ｋ ）上記反応製希釈剤あるいは有機溶剤は、バインダ
ー組成物の塗工あるいは、流延成形型に適した粘度に調
節するためなどに用いられるものであり、反応性希釈剤
としては、単官能性、多官能性のアクリレートあるいは
メタクリレートモノマーなどが使用でき、有機溶剤とし
ては、該オリゴウレタンアクリレート、反応性希釈剤、
添加剤及び液晶の共通溶剤が使用され、例えばトルエン
、ＴＨＦ、）４ＥＫ、酢酸エチルなどが使用できる。■UA-31)6H1υA-3061, Ai(-600
etc. (manufactured by Kyoeisha Oil and Fat Chemical Co., Ltd.) ■Takelac UV-60X-650-O8, UV-60
X27NS, UV-60X-27NS, UV-90
X-02NS, UV-90X-03NS etc. (Takeda f
(manufactured by fi products) ■UN-920OA, UN-5200, etc. (manufactured by Nedo Kogyo) ■Unidaic V-4221. V-4350, etc. (manufactured by Dainippon Ink Chemical Co., Ltd.) ■U-4HA, U-6HA, etc. (Shin Nakamura Chemical IJ Co., Ltd. 1
K) The above reactive diluent or organic solvent is used for coating the binder composition or adjusting the viscosity to be suitable for the casting mold.As the reactive diluent, monofunctional , polyfunctional acrylate or methacrylate monomers, etc. can be used, and as the organic solvent, the oligourethane acrylate, a reactive diluent,
Common solvents for additives and liquid crystals are used, such as toluene, THF, )4EK, and ethyl acetate.
上記光重合開始剤としては、アセトフェノン系、ベンゾ
イン系、ベンゾフェノン系などが使用でき、光増感剤と
しては、アミン類、例えばトリエタノールアミン、トリ
イソプロパツールアミン、４，４゛−ジメチルアミノベ
ンゾフェノンなどが使用できる。As the photopolymerization initiator, acetophenone type, benzoin type, benzophenone type, etc. can be used, and as the photosensitizer, amines such as triethanolamine, triisopropanolamine, 4,4゛-dimethylaminobenzophenone can be used. etc. can be used.
このようにして調製したバインダー組成物に、上記液晶
を混合・溶解しく３！ｌ宜粘度調節を行い）、得られた
液晶混合物を一方の導電基板上に塗工あるいは流延した
後、紫外線照射（ＵＶ）あるいは電子線照射（ＥＢ）に
より液晶層を形成し、次いで他方の導電基板を重ね合わ
せることによって本発明の液晶表示装置が作製される。The liquid crystal described above is mixed and dissolved in the binder composition thus prepared.3. After coating or casting the obtained liquid crystal mixture onto one conductive substrate, a liquid crystal layer is formed by ultraviolet irradiation (UV) or electron beam irradiation (EB), and then the other conductive substrate is coated or cast. The liquid crystal display device of the present invention is manufactured by overlapping conductive substrates.
該液晶層の厚みは５μＩ１１〜１００μ簡の間が望まし
く、より好ましくは１０μｍ〜３０μｍである。該バイ
ンダー組成物と液晶の混合比率は重量比でバインダー組
成物／液晶＝２／１〜３／１の間が好ましい。The thickness of the liquid crystal layer is preferably between 5 μm and 110 μm, more preferably between 10 μm and 30 μm. The mixing ratio of the binder composition and liquid crystal is preferably between 2/1 and 3/1 (binder composition/liquid crystal) in terms of weight ratio.
本発明における導電基板としては、剛性のもの（例えば
、インジウム・スズ酸化物（ＩＴＯ）付ガラス、ネサガ
ラス）や、可とう性のもの（例えば、ＩＴＯ付ＰＥＴフ
ィルム、ＴＴＯ付ＰＥｓフィルム）が使用され得る。As the conductive substrate in the present invention, a rigid one (for example, glass with indium tin oxide (ITO), Nesa glass) or a flexible one (for example, PET film with ITO, PEs film with TTO) is used. obtain.
（実施例） 以下、本発明を実施例に基づいて詳細に説明する。(Example) Hereinafter, the present invention will be explained in detail based on examples.
夾施ｌロー
以下の組成で液晶混合物を調製し、得られた液晶混合物
を透明なＩＴＯ付ＰＥＴフィルム（ダイセル化学社製「
セレック」、表面抵抗率＝３００Ω／口）上に、硬化後
の塗膜が１５μｍになるように塗工・硬化させた。A liquid crystal mixture was prepared with the following composition, and the obtained liquid crystal mixture was coated with a transparent ITO-coated PET film (manufactured by Daicel Chemical Co., Ltd.).
It was coated and cured on "SELEC" (surface resistivity = 300 Ω/mouth) so that the coating film after curing was 15 μm.
液晶： ＬＩＸＯＮ−４００２（＋ ッＶ社製＞
１６２（重量部）オリゴウレタンアクリレート
Ｕ＾−３０６１（（共栄社油脂化学社製）１００希釈ｊ
ＦＩＩ：２−ヒト１ノエチルＴクリレート
８光重合開始剤
２−シ゛エトキシＴセトフェノＮ （ＤＥＡＰ）
２上記液晶混合物は若干粘稠な
透明溶液であり、この液晶混合物を一方のＩＴＯ付ＰＥ
Ｔフィルムの上面に２０℃、６５％Ｒｈ雰囲気下で塗工
後、高圧水銀灯下１０ｃ＋＊のところで３秒間照射した
。Liquid crystal: LIXON-4002 (manufactured by V company)
162 (parts by weight) Oligourethane acrylate U^-3061 ((manufactured by Kyoeisha Yushigakusha Co., Ltd.) 100 dilution
FII: 2-human 1-noethyl T acrylate
8 Photopolymerization initiator 2-ethoxy Tcetopheno N (DEAP)
2 The above liquid crystal mixture is a slightly viscous transparent solution, and this liquid crystal mixture is
After coating the upper surface of the T film at 20° C. in a 65% Rh atmosphere, it was irradiated for 3 seconds at 10C+* under a high-pressure mercury lamp.
その後、形成された液晶層上に別のＩＴＯ付ＰＥＴフィ
ルムを貼り合わして液晶表示装置を作製した。Thereafter, another PET film with ITO was bonded onto the formed liquid crystal layer to produce a liquid crystal display device.
この装置の電圧オフ時、オン（ＡＣｌｏｏＶ）時の初期
光線透過率を表１に示し、さらに、この装置を７０℃恒
温槽にて１００時間処理後及び５０℃、９５％Ｒｈ雰囲
気中にて１００時間処理後の光線透過率も示すが、はと
んど変化は見られなかった。Table 1 shows the initial light transmittance of this device when the voltage is off and on (AClooV). The light transmittance after time treatment is also shown, and almost no change was observed.
夾践■ユ
以下の組成で液晶混合物を調製した他は、実施例１と同
様な方法にて硬化後の膜厚が２２μ量の液晶層を有する
液晶表示装置を得た。EXAMPLE 1 A liquid crystal display device having a liquid crystal layer having a thickness of 22 μm after curing was obtained in the same manner as in Example 1, except that a liquid crystal mixture was prepared with the following composition.
液晶： ＬＩＸＯＮ−４００２（チッソ社製） ２
００（重量部）オリゴウレタンＴり１ルート
ＵＡ−３０６）ｆ （共栄油脂化学社製）１３０希釈剤
テトラヒト′ロフルフリルメククリレート
７０光重合開始剤
イルカ゛キエＴ１８４
３得られた液晶表示装置の初期光線
透過率、７０℃・１００時間処理後及び５０℃・９５％
Ｒｈ、１００時間処理後の光線透過率をそれぞれ表１に
示すが、この場合もほとんど変化は見られなかった。Liquid crystal: LIXON-4002 (manufactured by Chisso Corporation) 2
00 (parts by weight) Oligourethane T-1 Root UA-306) f (Kyoei Yushi Kagaku Co., Ltd.) 130 Diluent Tetrahydrofurfuryl Mech Acrylate
70 Photopolymerization initiator Irukakie T184
3 Initial light transmittance of the obtained liquid crystal display device, after treatment at 70°C for 100 hours and at 50°C, 95%
The Rh and light transmittance after 100 hours treatment are shown in Table 1, and almost no change was observed in this case as well.
Ｌ敗■ユ
以下の組成で液晶混合物を調製し、この液晶混合物を実
施例１と同様な方法により、ＩＴＯ付ＰＥＴフィルム上
に塗工した後、２０℃で３分、さらに６０℃で５分間乾
燥し、乾燥後、別のＩＴＯ付ＰＥＴフィルムを貼り合わ
せて膜厚１２μＩの液晶層を有する液晶表示装置を作製
した。A liquid crystal mixture was prepared with the following composition, and this liquid crystal mixture was coated on a PET film with ITO in the same manner as in Example 1, and then heated at 20°C for 3 minutes and then at 60°C for 5 minutes. After drying, another PET film with ITO was bonded thereto to produce a liquid crystal display device having a liquid crystal layer with a thickness of 12 μI.
液晶： ＬｒＸ０Ｎ−４００２（チッソ社製）１０（重
量部）ボリメチルメクク１ルート
５シ゛オキサン
２０得られた
液晶表示装置の初期光線透過率、７０°Ｃ・１００時間
処理後及び５０℃・９５％Ｒｈ、１００時間処理後の光
線透過率をそれぞれ表１に示す。Liquid crystal: LrX0N-4002 (manufactured by Chisso Corporation) 10 (parts by weight) polymethyl mekuku 1 root
5-Sioxane
Table 1 shows the initial light transmittance of the obtained liquid crystal display device, the light transmittance after processing at 70° C. for 100 hours, and after processing at 50° C. and 95% Rh for 100 hours, respectively.
工絞凹１
以下の組成をホモジナイザーあるいはコロイドミルを用
いて乳化分散することにより、液晶混合物を調製し、得
られた液晶混合物を実施例１と同様な方法により、乾燥
後の膜厚が２０μ田になるようｒＴＯ付ＰＥＴフィルム
上に塗工し、６０℃で５分間、続いて１０５℃で３分間
乾燥した後、別のＩＴＯ付ＰＥＴフィルムを貼り合わせ
て液晶表示装置を作製した。A liquid crystal mixture was prepared by emulsifying and dispersing the following composition using a homogenizer or a colloid mill. After drying at 60° C. for 5 minutes and then at 105° C. for 3 minutes, another PET film with ITO was bonded to produce a liquid crystal display device.
液晶： ＬＩＸＯＮ−４００２（＋ ッ’／ 社製＞
１０（重Ｊｉ部）ホ０リヒ゛ニルアルコール
に−２２４−Ｃ（クラレ社製） ７水
７０得られた
液晶表示装置の初期光線透過率、７０℃・１００時間処
理後及び５０℃・９５％Ｒｈ、１００時間処理後の光線
透過率をそれぞれ表１に示す。Liquid crystal: LIXON-4002 (+'/manufactured by >
10 (Heavy Ji part) -224-C (manufactured by Kuraray Co., Ltd.) in polyvinyl alcohol 7 Water
Table 1 shows the initial light transmittance of the obtained liquid crystal display device, the light transmittance after treatment at 70° C. for 100 hours, and after treatment at 50° C. and 95% Rh for 100 hours, respectively.
（以下余白）
（発明の効果）
本発明の液晶表示装置は、液晶層を形成するバインダー
にオリゴウレタンアクリレートが主成分として含有され
ているので、導電層との接着性が良好であって剥離を生
じたり、耐湿性が低下することがなく、液晶表示装置の
信頼性を高めることができる。(The following is a blank space) (Effects of the invention) In the liquid crystal display device of the present invention, since the binder forming the liquid crystal layer contains oligourethane acrylate as a main component, the adhesiveness with the conductive layer is good and peeling is prevented. The reliability of the liquid crystal display device can be improved without causing moisture damage or deterioration of moisture resistance.
しかも、液晶層を作製するには、液晶とバインダーとを
混合して得られた液晶混合物を塗工した後、紫外線また
は電子線等の照射という極めて簡単な方法で行うことが
でき、従来のような機械的な分散操作が不要であって製
造が容易であると共に、さらに従来の熱硬化性モノマー
を重合させる場合のように、材料の収縮等を起こすこと
もなく、大型の液晶セルを作製する。二とも可能であり
、さらに−液型であるので、ポットライフ等の問題もな
く、操作及び制御が簡単である。さらに、本発明の液晶
層は加熱後においても不透明状態が低下することがなく
良好な特性を有している。Moreover, the liquid crystal layer can be produced by an extremely simple method of coating a liquid crystal mixture obtained by mixing liquid crystal and a binder and then irradiating it with ultraviolet rays or electron beams, unlike conventional methods. It is easy to manufacture because no mechanical dispersion operation is required, and it also does not cause shrinkage of the material, which is the case when conventional thermosetting monomers are polymerized, making it possible to create large liquid crystal cells. . Both are possible, and since it is a liquid type, there are no problems such as pot life, and operation and control are simple. Furthermore, the liquid crystal layer of the present invention does not lose its opaque state even after heating and has good properties.
、 ・・ の ｔ−目 日
第１図は本発明の液晶表示装置の一実施例を示す概略説
明図である。, . . . Day t-th FIG. 1 is a schematic explanatory diagram showing an embodiment of the liquid crystal display device of the present invention.
１．２・・・導電層、３・・・液晶層。1.2... Conductive layer, 3... Liquid crystal layer.
以上that's all
Claims (1)
られている液晶表示装置であって、該液晶層が、正の誘
電率異方性を有するネマチック型液晶と、オリゴウレタ
ンアクリレートを主成分として含有するバインダーによ
り形成されている液晶表示装置。1. A liquid crystal display device in which a liquid crystal layer is provided between conductive substrates, at least one of which is transparent, and the liquid crystal layer is mainly composed of a nematic liquid crystal having positive dielectric constant anisotropy and oligourethane acrylate. A liquid crystal display device formed from a binder containing
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307989A JPH02203319A (en) | 1989-01-31 | 1989-01-31 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307989A JPH02203319A (en) | 1989-01-31 | 1989-01-31 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02203319A true JPH02203319A (en) | 1990-08-13 |
Family
ID=12100409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2307989A Pending JPH02203319A (en) | 1989-01-31 | 1989-01-31 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02203319A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6791658B2 (en) | 2000-09-12 | 2004-09-14 | Canon Kabushiki Kaisha | Liquid crystal device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63271233A (en) * | 1986-12-23 | 1988-11-09 | Asahi Glass Co Ltd | Liquid crystal optical element |
-
1989
- 1989-01-31 JP JP2307989A patent/JPH02203319A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63271233A (en) * | 1986-12-23 | 1988-11-09 | Asahi Glass Co Ltd | Liquid crystal optical element |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6791658B2 (en) | 2000-09-12 | 2004-09-14 | Canon Kabushiki Kaisha | Liquid crystal device |
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