JPH04310921A - Liquid crystal electro-optic element - Google Patents
Liquid crystal electro-optic elementInfo
- Publication number
- JPH04310921A JPH04310921A JP7645091A JP7645091A JPH04310921A JP H04310921 A JPH04310921 A JP H04310921A JP 7645091 A JP7645091 A JP 7645091A JP 7645091 A JP7645091 A JP 7645091A JP H04310921 A JPH04310921 A JP H04310921A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- polysilane
- light scattering
- scattering film
- initiator
- 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 45
- 229920000548 poly(silane) polymer Polymers 0.000 claims abstract description 26
- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000003505 polymerization initiator Substances 0.000 claims description 11
- 239000004988 Nematic liquid crystal Substances 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 abstract description 10
- 239000011159 matrix material Substances 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000002904 solvent Substances 0.000 abstract description 2
- 239000003999 initiator Substances 0.000 abstract 3
- 238000003848 UV Light-Curing Methods 0.000 abstract 2
- 238000010828 elution Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 17
- 239000000203 mixture Substances 0.000 description 11
- 239000000758 substrate Substances 0.000 description 6
- 210000002858 crystal cell Anatomy 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 3
- -1 poly(phenylmethylsilylene) Polymers 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 description 1
- VOBUAPTXJKMNCT-UHFFFAOYSA-N 1-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound CCCCCC(OC(=O)C=C)OC(=O)C=C VOBUAPTXJKMNCT-UHFFFAOYSA-N 0.000 description 1
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 1
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- JZZIHCLFHIXETF-UHFFFAOYSA-N dimethylsilicon Chemical group C[Si]C JZZIHCLFHIXETF-UHFFFAOYSA-N 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- YDKNBNOOCSNPNS-UHFFFAOYSA-N methyl 1,3-benzoxazole-2-carboxylate Chemical compound C1=CC=C2OC(C(=O)OC)=NC2=C1 YDKNBNOOCSNPNS-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、液晶テレビ，液晶プロ
ジェクター，液晶ディスプレイなどの液晶電気光学素子
に関し、さらには高精細液晶ライトバルブに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to liquid crystal electro-optical devices such as liquid crystal televisions, liquid crystal projectors, and liquid crystal displays, and more particularly to high-definition liquid crystal light valves.
【０００２】0002
【発明の概要】本発明は液晶電気光学素子に関し、紫外
線硬化型高分子の重合開始剤としてポリシランを用いる
ことにより、光散乱膜の比抵抗を液晶単品と同じにし、
かつ安定なＴＦＥ駆動を可能として、表示品位を向上さ
せる。SUMMARY OF THE INVENTION The present invention relates to a liquid crystal electro-optical element, which uses polysilane as a polymerization initiator for an ultraviolet curable polymer to make the specific resistance of a light scattering film the same as that of a single liquid crystal.
Moreover, it enables stable TFE driving and improves display quality.
【０００３】0003
【従来の技術】図１は液晶電気光学素子の一般的構成を
示す模式的断面図である。図１に示したように光散乱膜
１は、ネマチック液晶５が粒子状または３次元ネットワ
ーク構造状高分子６中に分散した構造を持つ。光散乱膜
１は、電圧印加にともなって光散乱状態から光透過状態
に変化する。2. Description of the Related Art FIG. 1 is a schematic cross-sectional view showing the general structure of a liquid crystal electro-optical element. As shown in FIG. 1, the light scattering film 1 has a structure in which nematic liquid crystals 5 are dispersed in polymers 6 in the form of particles or a three-dimensional network structure. The light scattering film 1 changes from a light scattering state to a light transmitting state as a voltage is applied.
【０００４】この光散乱膜をディスプレイとして使用す
るには、図１のように、素子基板２に形成された回路素
子３、および画素電極８と対向基板４上に形成された透
明電極（共通電極）７で光散乱膜１を挟んで、印加電圧
で透過光量をコントロールすることによって、表示が可
能になる。光散乱膜をディスプレイとして使用すると、
従来の液晶表示素子に不可欠だった偏光板が不必要にな
るため、明るい表示素子を得ることが可能であり、高輝
度が望まれる高精細液晶ライトバルブには特に有望であ
る。In order to use this light scattering film as a display, as shown in FIG. ) 7 with the light scattering film 1 in between, and by controlling the amount of transmitted light with an applied voltage, display is possible. When the light scattering film is used as a display,
Since the polarizing plate that was essential to conventional liquid crystal display elements is no longer necessary, it is possible to obtain a bright display element, and this is particularly promising for high-definition liquid crystal light valves where high brightness is desired.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来の
光散乱膜の比抵抗は１０９ Ω・ｃｍと、液晶単体の１
０１２Ω・ｃｍより低い。そのため、ＴＦＴ（薄膜トラ
ンジスタ）素子と組み合わせた場合電圧保持率が低く、
極端な場合には駆動が不可能であった。また、透明電極
から構成される単純マトリックスの場合でも、表示の焼
き付きに代表される表示品位の低下が顕著であった。[Problems to be Solved by the Invention] However, the specific resistance of the conventional light scattering film is 109 Ω・cm, which is
Lower than 0.012Ω・cm. Therefore, when combined with a TFT (thin film transistor) element, the voltage holding rate is low.
In extreme cases, driving was impossible. Furthermore, even in the case of a simple matrix composed of transparent electrodes, there was a noticeable deterioration in display quality, typified by display burn-in.
【０００６】これらの原因は次のように考えられる。液
晶・高分子複合膜を作成する際に、従来の紫外線硬化型
樹脂と重合開始剤を使用した場合には、紫外線照射によ
りすみやかに重合する。しかし、重合開始剤は高分子マ
トリックスに組み込まれず、低分子の状態で残留する。
これが不純物として作用するので、光散乱膜の比抵抗が
低下する。あるいは、高分子マトリックス中から徐々に
液晶中に溶解するので、液晶表示体の特性，性能が経時
的に変化し、製品としての信頼性に問題があった。[0006] The causes of these problems are thought to be as follows. When a conventional ultraviolet curable resin and polymerization initiator are used to create a liquid crystal/polymer composite film, the film quickly polymerizes when exposed to ultraviolet rays. However, the polymerization initiator is not incorporated into the polymer matrix and remains in a low molecular state. Since this acts as an impurity, the specific resistance of the light scattering film decreases. Alternatively, since it gradually dissolves into the liquid crystal from within the polymer matrix, the characteristics and performance of the liquid crystal display change over time, resulting in problems with product reliability.
【０００７】本発明はこのような課題を解決するために
なされたもので、その目的とするところは、光散乱膜の
比抵抗を液晶単体とほぼ同じ値にし、表示品質、および
信頼性の高い液晶表示素子を提供することにある。The present invention has been made to solve these problems, and its purpose is to make the resistivity of the light scattering film almost the same as that of the liquid crystal itself, and to achieve high display quality and reliability. An object of the present invention is to provide a liquid crystal display element.
【０００８】[0008]
【課題を解決するための手段】このような目的を達成す
るために、本発明の液晶電気光学素子は、紫外線硬化型
樹脂中にネマチック液晶が分散されている光散乱膜を有
する液晶電気光学素子において、前記紫外線硬化型樹脂
の重合開始剤としてポリシランが含有されていることを
特徴とする。[Means for Solving the Problems] In order to achieve the above object, the liquid crystal electro-optical element of the present invention is a liquid crystal electro-optical element having a light scattering film in which nematic liquid crystal is dispersed in an ultraviolet curable resin. The method is characterized in that polysilane is contained as a polymerization initiator for the ultraviolet curable resin.
【０００９】ポリシランとしては、ポリ（フェニルメチ
ルシリレン），ジメチルシリレンとフェニルメチルシリ
レンとの共重合体，ポリジヘキシルシリレンなどが好ま
しく用いられる。As the polysilane, poly(phenylmethylsilylene), a copolymer of dimethylsilylene and phenylmethylsilylene, polydihexylsilylene, etc. are preferably used.
【００１０】本発明に適用できるポリシランとしては下
記式で示されるものが代表例として挙げられる。Typical examples of polysilanes applicable to the present invention include those represented by the following formula.
【００１１】[0011]
【化１】[Chemical formula 1]
【００１２】ポリシランは、紫外線を照射すると開裂し
ラジカルになる。そして、このラジカルによってポリシ
ランが３次元架橋すると同時に、ラジカルが重合開始剤
として作用し、紫外線硬化型樹脂が重合を始める。[0012] When polysilane is irradiated with ultraviolet rays, it cleaves into radicals. Then, at the same time as the polysilane is three-dimensionally crosslinked by these radicals, the radicals act as a polymerization initiator, and the ultraviolet curable resin begins to polymerize.
【００１３】紫外線硬化型樹脂としては、ポリエステル
アクリレート，エポキシアクリレート，ウレタンアクリ
レートなどのオリゴマー，エチルヘキシルアクリレート
，Ｎ−ビニルピロリドン，ヘキサンジオールジアクリレ
ート，ネオペンチルグリコールジアクリレート，トリメ
チロールプロパントリアクリレート，ジペンタエリスリ
トールヘキサアクリレートなどの反応性希釈剤の単独、
あるいはオリゴマーとの混合物が好ましく用いられる。Examples of UV-curable resins include oligomers such as polyester acrylate, epoxy acrylate, and urethane acrylate, ethylhexyl acrylate, N-vinylpyrrolidone, hexanediol diacrylate, neopentyl glycol diacrylate, trimethylolpropane triacrylate, and dipentaerythritol. Reactive diluents alone, such as hexaacrylates,
Alternatively, a mixture with an oligomer is preferably used.
【００１４】ポリシラン成分と紫外線硬化型樹脂の混合
割合は、紫外線硬化型高分子１００重量部に対してポリ
シラン０．０５〜２重量部混合される。ポリシランが０
．０５重量部未満では重合開始剤としての作用があまり
期待できず、ポリシランが２重量部を越えると紫外線硬
化した後の樹脂が液晶により膨潤する傾向にある。The mixing ratio of the polysilane component and the ultraviolet curable resin is 0.05 to 2 parts by weight of the polysilane per 100 parts by weight of the ultraviolet curable polymer. Polysilane is 0
．． If the polysilane is less than 0.5 parts by weight, it cannot be expected to function as a polymerization initiator very well, and if the polysilane exceeds 2 parts by weight, the resin after being cured by ultraviolet rays tends to swell with the liquid crystal.
【００１５】光散乱膜を作成するには、まず上記のポリ
シランと紫外線硬化型樹脂との混合物に液晶を添加混合
しなければならないが、液晶の混合割合はポリシランと
紫外線硬化型樹脂と液晶との混合物の２５〜９５重量％
が望ましい。液晶の割合が２５重量％未満ではコントラ
ストが不十分であり、また、液晶の割合が９５重量％を
越えると光散乱能力が低下する。[0015] In order to create a light scattering film, it is first necessary to add and mix liquid crystal to the above mixture of polysilane and ultraviolet curable resin, but the mixing ratio of liquid crystal is determined by the proportion of polysilane, ultraviolet curable resin, and liquid crystal. 25-95% by weight of the mixture
is desirable. When the proportion of liquid crystal is less than 25% by weight, the contrast is insufficient, and when the proportion of liquid crystal exceeds 95% by weight, the light scattering ability decreases.
【００１６】このようにして得られた混合物は、２枚の
基板の間に挟む、あるいは、１枚の基板上に塗布するな
どした後に、紫外線を照射して硬化させる。The mixture thus obtained is sandwiched between two substrates or coated on one substrate, and then cured by irradiation with ultraviolet rays.
【００１７】[0017]
【作用】本発明によれば、紫外線照射前は溶剤中に可溶
であったポリシランが、紫外線照射によって不溶化する
と同時に、ポリシランと紫外線硬化型樹脂とが重合反応
し、高分子マトリックスに固定される。従って、未反応
の低分子量物および重合開始剤が液晶中に不純物として
溶け出すことはなくなり、その結果、比抵抗が上昇する
。[Operation] According to the present invention, the polysilane, which was soluble in the solvent before irradiation with ultraviolet rays, becomes insolubilized by irradiation with ultraviolet rays, and at the same time, the polysilane and the ultraviolet curable resin undergo a polymerization reaction and are fixed in the polymer matrix. . Therefore, unreacted low molecular weight substances and polymerization initiators do not dissolve into the liquid crystal as impurities, and as a result, the specific resistance increases.
【００１８】[0018]
【実施例】以下、図面を参照しつつ本発明の実施例を詳
細に説明する。Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
【００１９】図１は従来例の図１に示した液晶電気光学
素子と同様の構造を有する。すなわち、光散乱膜１，素
子基板２，回路素子３，対向基板４，ネマチック液晶５
，粒子状あるいは３次元ネットワーク構造状高分子６，
対向電極７，画素電極８，シール剤９を有する。電圧無
印加状態では光散乱膜は光散乱状態であり、透明電極あ
るいはＴＦＴ素子により電圧を印加することにより光透
過状態に変化する。FIG. 1 has a structure similar to that of the conventional liquid crystal electro-optical element shown in FIG. That is, a light scattering film 1, an element substrate 2, a circuit element 3, a counter substrate 4, a nematic liquid crystal 5
, particulate or three-dimensional network structured polymer 6,
It has a counter electrode 7, a pixel electrode 8, and a sealant 9. The light scattering film is in a light scattering state when no voltage is applied, and changes to a light transmitting state by applying a voltage through a transparent electrode or a TFT element.
【００２０】この液晶電気光学素子は次のようにして作
成した。This liquid crystal electro-optical device was produced as follows.
【００２１】（実施例１）ポリシランとしてはフェニル
メチルポリシラン（以下、ＭＰＳ）を使用し、紫外線硬
化樹脂トリプロピレングリコルジアクリレート（以下、
ＴＰＧＤＡ）と、ＭＰＳ：ＴＰＧＤＡ＝１：１００で混
合した。この混合物と液晶ＰＮ−００１（ロディック社
製）とを混合物：液晶＝２５：７５（重量比）の割合で
混合した。これらの混合物を、あらかじめ組み立ててお
いたパネルに真空封入した。ギャップは５ミクロンであ
った。次に、１５００ｍＪ／ｃｍ２ の紫外線を照射し
、硬化を行った。(Example 1) Phenylmethylpolysilane (hereinafter referred to as MPS) was used as the polysilane, and ultraviolet curing resin tripropylene glycoldiacrylate (hereinafter referred to as
TPGDA) and MPS:TPGDA=1:100. This mixture and liquid crystal PN-001 (manufactured by Roddick) were mixed at a ratio of mixture:liquid crystal=25:75 (weight ratio). These mixtures were vacuum sealed into preassembled panels. The gap was 5 microns. Next, 1500 mJ/cm2 of ultraviolet rays were irradiated to effect curing.
【００２２】得られた液晶セルの比抵抗は、２．１×１
０１１Ω・ｃｍ、コントラストは１：１３０であった。
このセルを６０度乾熱の条件下に放置したところ２００
０時間経過しても表示不良は発生しなかった。The specific resistance of the obtained liquid crystal cell was 2.1×1
011 Ω·cm, and the contrast was 1:130. When this cell was left under dry heat conditions of 60 degrees, the
No display failure occurred even after 0 hours had elapsed.
【００２３】（実施例２）実施例１における混合物の代
わりに、ＭＰＳ：ＴＰＧＤＡ＝０．２：１００の割合で
混合した混合物を、混合物：液晶（ＰＮ−００１）＝２
５：７５の割合で混合した。それ以外は、実施例１と同
様にして液晶セルを組み立てた。得られた液晶セルの比
抵抗は、１．３×１０１０Ω・ｃｍ、コントラストは１
：１０５であった。このセルを６０度乾熱の条件下に放
置したところ２０００時間経過しても表示不良は発生し
なかった。(Example 2) Instead of the mixture in Example 1, a mixture prepared at a ratio of MPS:TPGDA=0.2:100 was used as a mixture: liquid crystal (PN-001)=2
They were mixed at a ratio of 5:75. Other than that, a liquid crystal cell was assembled in the same manner as in Example 1. The specific resistance of the obtained liquid crystal cell was 1.3×1010 Ω・cm, and the contrast was 1.
:105. When this cell was left under dry heat conditions of 60 degrees, no display defects occurred even after 2000 hours.
【００２４】（比較例）実施例１におけるポリシランの
代わりに、重合開始剤として２，４−ジエチルオキサン
トンを、２，４−ジエチルオキサントン：ＴＰＧＤＡ＝
０．５：１００の割合で混合した。それ以外は、実施例
１と同様にして液晶セルを組み立てた。得られた液晶セ
ルの比抵抗は、６．５×１０７ Ω・ｃｍ、コントラス
トは１：１０６であった。このセルを６０度乾熱の条件
下に放置したところ５００時間経過後、１０枚中８枚の
パネルで表示不良が発生した。(Comparative Example) Instead of the polysilane in Example 1, 2,4-diethyloxanthone was used as a polymerization initiator, and 2,4-diethyloxanthone:TPGDA=
They were mixed at a ratio of 0.5:100. Other than that, a liquid crystal cell was assembled in the same manner as in Example 1. The specific resistance of the obtained liquid crystal cell was 6.5×10 7 Ω·cm, and the contrast was 1:10 6 . When this cell was left under dry heat conditions of 60 degrees Celsius, display defects occurred in 8 out of 10 panels after 500 hours.
【００２５】[0025]
【発明の効果】以上説明したように、本発明によれば、
ポリシランを重合開始剤に適用することにより、低分子
量の状態で残留した重合開始剤が液晶中に不純物として
存在することがなくなり、光散乱膜の比抵抗が液晶単品
並みに向上する。その結果、安定なＴＦＴ駆動が可能に
なり、表示品位も向上する。[Effects of the Invention] As explained above, according to the present invention,
By applying polysilane as a polymerization initiator, the polymerization initiator remaining in a low molecular weight state is no longer present as an impurity in the liquid crystal, and the specific resistance of the light scattering film is improved to the same level as that of a single liquid crystal. As a result, stable TFT driving becomes possible and display quality is improved.
【図１】液晶電気光学素子の一般的な構成を示す模式的
断面図である。FIG. 1 is a schematic cross-sectional view showing a general configuration of a liquid crystal electro-optical element.
１ 光散乱膜
２ 素子基板
３ 回路素子
４ 対向基板
５ ネマチック液晶
６ 粒子状あるいは３次元ネットワーク構造状高分子
７ 対向電極
８ 画素電極
９ シール剤1 Light scattering film 2 Element substrate 3 Circuit element 4 Counter substrate 5 Nematic liquid crystal 6 Particulate or three-dimensional network structured polymer 7 Counter electrode 8 Pixel electrode 9 Sealing agent
Claims (3)
が分散されている光散乱膜を有する液晶電気光学素子に
おいて、前記紫外線硬化型樹脂の重合開始剤としてポリ
シランが含有されていることを特徴とする液晶電気光学
素子。1. A liquid crystal electro-optical element having a light scattering film in which nematic liquid crystal is dispersed in an ultraviolet curable resin, characterized in that polysilane is contained as a polymerization initiator for the ultraviolet curable resin. Liquid crystal electro-optical element.
ポリシランが０．０５〜２重量部混合されていることを
特徴とする請求項１に記載の液晶電気光学素子。2. The liquid crystal electro-optical element according to claim 1, wherein 0.05 to 2 parts by weight of polysilane is mixed with 100 parts by weight of the ultraviolet curable resin.
紫外線硬化型樹脂とネマチック液晶との全体量に対して
２５〜９５重量％含有されていることを特徴とする請求
項１に記載の液晶電気光学素子。3. The liquid crystal electro-optical element according to claim 1, wherein the nematic liquid crystal is contained in an amount of 25 to 95% by weight based on the total amount of polysilane, ultraviolet curable resin, and nematic liquid crystal. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7645091A JPH04310921A (en) | 1991-04-09 | 1991-04-09 | Liquid crystal electro-optic element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7645091A JPH04310921A (en) | 1991-04-09 | 1991-04-09 | Liquid crystal electro-optic element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04310921A true JPH04310921A (en) | 1992-11-02 |
Family
ID=13605491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7645091A Pending JPH04310921A (en) | 1991-04-09 | 1991-04-09 | Liquid crystal electro-optic element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04310921A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06148605A (en) * | 1992-11-06 | 1994-05-27 | Semiconductor Energy Lab Co Ltd | Liquid crystal electrooptical device |
| WO1995004791A1 (en) * | 1993-08-06 | 1995-02-16 | Minnesota Mining And Manufacturing Company | Light modulating device having a silicon-containing matrix |
| US5641426A (en) * | 1994-04-29 | 1997-06-24 | Minnesota Mining And Manufacturing Company | Light modulating device having a vinyl ether-based matrix |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04227843A (en) * | 1990-05-29 | 1992-08-17 | Merck Patent Gmbh | Method for producing liquid crystal capsule |
| JPH04240614A (en) * | 1991-01-24 | 1992-08-27 | Seiko Epson Corp | Liquid crystal electrooptical element |
-
1991
- 1991-04-09 JP JP7645091A patent/JPH04310921A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04227843A (en) * | 1990-05-29 | 1992-08-17 | Merck Patent Gmbh | Method for producing liquid crystal capsule |
| JPH04240614A (en) * | 1991-01-24 | 1992-08-27 | Seiko Epson Corp | Liquid crystal electrooptical element |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06148605A (en) * | 1992-11-06 | 1994-05-27 | Semiconductor Energy Lab Co Ltd | Liquid crystal electrooptical device |
| WO1995004791A1 (en) * | 1993-08-06 | 1995-02-16 | Minnesota Mining And Manufacturing Company | Light modulating device having a silicon-containing matrix |
| US5585035A (en) * | 1993-08-06 | 1996-12-17 | Minnesota Mining And Manufacturing Company | Light modulating device having a silicon-containing matrix |
| US5641426A (en) * | 1994-04-29 | 1997-06-24 | Minnesota Mining And Manufacturing Company | Light modulating device having a vinyl ether-based matrix |
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