Liquid crystal composition, liquid crystal device and liquid crystal
display apparatus
    3.
    发明授权
    Liquid crystal composition, liquid crystal device and liquid crystal display apparatus 失效
    液晶组合物,液晶装置和液晶显示装置

    公开(公告)号:US5728318A

    公开(公告)日:1998-03-17

    申请号:US555063

    申请日:1995-11-08

    CPC分类号: C09K19/46 C09K19/34

    摘要: A liquid crystal composition is composed of at least three types of mesomorphic compounds. The liquid crystal composition may preferably contain a mesomorphic compound having an indan skeleton represented by the formula (1) or (3) and a mesomorphic compound having a terminal cyclic group represented by the formula (2) or (4). The liquid crystal composition may also preferably further contain an optically active compound to be formulated as a chiral smectic (or ferroelectric) liquid crystal composition. When the chiral smectic liquid crystal composition is disposed between a pair of electrode substrates provided with uniaxial alignment axes, the liquid crystal composition may preferably be placed in an alignment state in C1 uniform alignment, so that a resultant liquid crystal device provides a higher contrast ratio and a wider drive voltage margin.

    摘要翻译: 液晶组合物由至少三种类型的介晶化合物组成。 液晶组合物可以优选含有具有由式(1)或(3)表示的茚满骨架的介晶化合物和具有由式(2)或(4)表示的末端环状基团的介晶化合物。 液晶组合物还优选还含有配制成手性近晶(或铁电体)液晶组合物的光学活性化合物。 当手性近晶液晶组合物配置在具有单轴取向轴的一对电极基板之间时,液晶组合物优选地可以以C1均匀取向放置在取向状态,使得所得到的液晶装置提供更高的对比度 和更宽的驱动电压裕度。

    Liquid crystal composition, liquid crystal device and liquid crystal
apparatus
    4.
    发明授权
    Liquid crystal composition, liquid crystal device and liquid crystal apparatus 失效
    液晶组合物,液晶装置和液晶装置

    公开(公告)号:US5709818A

    公开(公告)日:1998-01-20

    申请号:US592159

    申请日:1996-01-26

    CPC分类号: C09K19/46 C09K19/34

    摘要: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 and R.sub.2 independently denote a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 denotes a single bond, --O--, --CO--O-- or --O--CO--; and A.sub.1 denotes ##STR2## and a mesomorphic compound represented by the following formula (B): ##STR3## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.2 and X.sub.3 independently denote a single bond, --O--, --CO--O-- or --O--CO--; m is an integer of 3-16; and A.sub.2 denotes ##STR4## or ##STR5## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high and stable contrast ratio.

    摘要翻译: 液晶组合物含有由下式(A)表示的介晶化合物:其中R 1和R 2分别表示具有1-18个碳原子的直链或支链烷基; X1表示单键,-O - , - CO-O-或-O-CO-; A1表示下式(B)表示的介晶化合物:(B)其中,R3表示碳原子数为1〜18的直链或支链烷基; X2和X3独立地表示单键,-O - , - CO-O-或-O-CO-; m为3-16的整数; 并且A2表示。液晶组合物优选配制成手性近晶液晶组合物。 液晶组合物可用于提供使用具有良好取向特性,良好的驱动特性和高且稳定的对比度的液晶组合物的液晶装置。

    Ferroelectric liquid crystal device and liquid crystal apparatus using it
    5.
    发明授权
    Ferroelectric liquid crystal device and liquid crystal apparatus using it 失效
    铁电液晶装置及其使用的液晶装置

    公开(公告)号:US5573703A

    公开(公告)日:1996-11-12

    申请号:US320525

    申请日:1994-10-11

    摘要: A ferroelectric liquid crystal device comprises:a pair of substrates comprising electrodes for applying a voltage, the pair of substrates having been subjected to a uniaxial orientation treatment, and being oriented at a distance opposite to each other such that the uniaxial orientation axes cross each other at a predetermined angle; the display device further comprising a liquid crystal material disposed between the exhibiting at least two stable states and pair of substrates, the liquid crystal material having a cone angle, a pretilt angle, a tilt angle and an apparent tilt angle, wherein:the liquid crystal material having an orientation state which satisfies the conditions represented by.THETA. .THETA..sub..alpha. >.THETA./2 in which .THETA. denotes the cone angle, .alpha. denotes the pretilt angle, .delta. denotes the tilt angle and .THETA..sub..alpha. denotes the apparent tilt angle,wherein the phase of the liquid crystal changes from isotropic phase via cholesteric phase and smectic A phase to chiral smectic C phase as the liquid crystal cools from a high temperature and the liquid crystal has a temperature range in which the cholesteric phase and the smectic A phase exist at the same time.

    摘要翻译: 铁电液晶装置包括:一对基板,包括用于施加电压的电极,所述一对基板经过单轴取向处理,并且以彼此相对的距离取向,使得单轴取向轴彼此交叉 以预定角度; 所述显示装置还包括设置在显示至少两个稳定状态和一对基板之间的液晶材料,所述液晶材料具有锥角,预倾角,倾斜角和视在倾斜角,其中:所述液晶 具有满足由THETA表示锥形角度的THETA <α+δ,Δα和THETA> THETAα> THETA / 2表示的条件的取向状态的材料α表示预倾角,delta表示倾斜角, THETAα表示视在倾斜角,其中当液晶从高温冷却时,液晶的相位从各向同性相通过胆甾醇相和近晶A相变为手性近晶C相,液晶的温度范围为 胆甾醇相和近晶A相同时存在。

    Liquid crystal device and display apparatus
    7.
    发明授权
    Liquid crystal device and display apparatus 失效
    液晶显示装置及显示装置

    公开(公告)号:US5422748A

    公开(公告)日:1995-06-06

    申请号:US979283

    申请日:1992-11-20

    摘要: A liquid crystal device, comprising: a pair of substrates, and a ferroelectric liquid crystal disposed between the substrates, each of the substrates having thereon an electrode for applying a voltage to the liquid crystal and a uniaxial alignment film provided with a uniaxial alignment axis, the alignment films on the pair of substrates being substantially parallel with each other and having an identical axis direction; wherein the ferroelectric liquid crystal is disposed in such an alignment state that the liquid crystal shows a pretilt angle .alpha., a cone angle H, an inclination angle .delta. of SmC* layer, and an apparent tilt angle .theta. a satisfying relationships of: H .theta.a>H/2; and the ferroelectric liquid crystal comprises at least three mesomorphic compounds represented by the following formula (I): ##STR1## wherein m and n are an integer of 6 to 12, said at least three mesomorphic compounds including:(a) a mesomorphic compound showing a nematic phase and no smectic C phase;(b) a mesomorphic compound showing a nematic phase and a smectic C phase; and(c) a mesomorphic compound showing a smectic C phase and no nematic phase, respectively on temperature decrease from a temperature of isotropic liquid.

    摘要翻译: 一种液晶装置,包括:一对基板和设置在基板之间的铁电液晶,每个基板上具有用于向液晶施加电压的电极和设置有单轴对准轴的单轴取向膜, 一对基板上的取向膜基本上彼此平行并且具有相同的轴线方向; 其特征在于,所述强电介质液晶配置成使得液晶呈现预倾角α,锥角+ E,crc / H /,SmC *层的倾斜角度Δ和满足表观倾斜角θa的取向状态 关系:+ E,crc / H /α+δ和+ E,crc / H />θa> + E,crc / H / 所述铁电液晶包含由下式(I)表示的至少三种介晶化合物:其中m和n为6〜12的整数,所述至少3种介晶化合物包括:(a) 显示向列相和没有近晶相的介晶化合物; (b)显示向列相和近晶C相的介晶化合物; 和(c)分别表现出从各向同性液体的温度降低的层状C相和无向列相的介晶化合物。