Biphenyl esters and liquid crystal materials and devices containing them
    4.
    发明授权
    Biphenyl esters and liquid crystal materials and devices containing them 失效
    联苯酯和含有它们的液晶材料和装置

    公开(公告)号:US4769176A

    公开(公告)日:1988-09-06

    申请号:US923825

    申请日:1986-10-30

    摘要: Biphenyl esters of formula (I), wherein formula (II) represents formula (III) or formula (IV), R.sub.1 represents C.sub.3 -C.sub.12 alkyl, alkoxy, alkylcarbonyloxy, alkoxycarbonyl or alkoxycarbonyloxy, j is 0 or 1, R.sub.2 represents C.sub.3 -C.sub.12 alkyl or alkoxy, one of Q.sub.1 or Q.sub.2 is fluorine and the other is hydrogen, provided that when j is 0 and formula (II) is formula (III) and both R.sub.1 and R.sub.2 are n-alkyl, then the total number of carbon atoms in R.sub.1 and R.sub.2 is more than 12. These compounds may be used as constituents of liquid crystal mixtures which show a room temperature ferroelectric smectic phase, and a number of such mixtures are described.

    摘要翻译: PCT No.PCT / GB86 / 00040 Sec。 371日期1986年10月30日第 102(e)1986年10月30日PCT PCT日期:1986年1月21日PCT公布。 出版物WO86 / 04327 日期:1986年7月31日。式(I)的二苯基酯,其中式(II)表示式(III)或式(Ⅳ),R1表示C3-C12烷基,烷氧基,烷基羰基氧基,烷氧基羰基或烷氧基羰氧基,j为0或 1,R2表示C3-C12烷基或烷氧基,Q1或Q2中的一个为氟,另一个为氢,条件是当j为0且式(II)为式(III)时,R1和R2均为正烷基, 那么R1和R2中的碳原子总数大于12.这些化合物可以用作显示室温铁电近晶相的液晶混合物的组分,并且描述了许多这样的混合物。

    Smectic liquid crystal devices
    5.
    再颁专利
    Smectic liquid crystal devices 失效
    近晶体液晶装置

    公开(公告)号:USRE37509E1

    公开(公告)日:2002-01-15

    申请号:US08371035

    申请日:1995-01-10

    IPC分类号: G02F113

    摘要: A method, device, and material for providing a fast switching liquid crystal display employs the ferro electric effect of chiral smectic liquid crystal material. To provide a uniform appearance the liquid crystal material is arranged to have a long cholesteric pitch at a temperature close to a smectic/cholesteric phase transistion temperature. This long cholesteric pitch allows liquid crystal molecules to cool from the cholesteric to smectic phase with a uniform alignment. The smectic material is contained in a cell between wells (2, 3) bearing electrodes (5, 6) and surface treated to provide homogeneous alignment of liquid crystal material (7).

    摘要翻译: 用于提供快速切换液晶显示器的方法,装置和材料采用手性近晶液晶材料的铁电效应。 为了提供均匀的外观,液晶材料被布置成在接近于近晶/胆甾醇相转移温度的温度下具有长的胆甾醇型沥青。 这种长的胆甾醇型间距允许液晶分子以均匀排列从胆甾醇相冷却到近晶相。 近晶材料包含在承载电极(5,6)的孔(2,3)之间的电池中,并进行表面处理以提供液晶材料(7)的均匀取向。

    Smectic liquid crystal devices
    6.
    发明授权
    Smectic liquid crystal devices 失效
    近晶体液晶装置

    公开(公告)号:US5061047A

    公开(公告)日:1991-10-29

    申请号:US279553

    申请日:1988-12-01

    摘要: A method, device, and material for providing a fast switching liquid crystal display employs the ferro electric effect of chiral smectic liquid crystal material. To provide a uniform appearance the liquid crystal material is arranged to have a long cholesteric pitch at a temperature close to a smectic/cholesteric phase transistion temperature. This long cholesteric pitch allows liquid crystal molecules to cool from the cholesteric to smectic phase with a uniform alignment. The smectic material is contained in a cell between walls (2, 3) bearing electrodes (5, 6) and surface treated to provide homogeneous alignment of liquid crystal material (7).

    摘要翻译: 用于提供快速切换液晶显示器的方法,装置和材料采用手性近晶液晶材料的铁电效应。 为了提供均匀的外观,液晶材料被布置成在接近于近晶/胆甾醇相转移温度的温度下具有长的胆甾醇型沥青。 这种长的胆甾醇型间距允许液晶分子以均匀排列从胆甾醇相冷却到近晶相。 近晶材料包含在承载电极(5,6)的壁(2,3)之间的电池中,并进行表面处理以提供液晶材料(7)的均匀排列。

    Smectic liquid crystal devices
    7.
    发明授权
    Smectic liquid crystal devices 失效
    近晶体液晶装置

    公开(公告)号:US4969719A

    公开(公告)日:1990-11-13

    申请号:US279555

    申请日:1988-12-01

    CPC分类号: G02F1/141

    摘要: A liquid crystal display is arranged to provide very low minimum light trmission in one of its two switchable states. This makes it useful for a shutter (FIG. 1) and for high contrast digital displays (FIG. 2). A layer of a chiral smectic liquid crystal material is contained between two cell walls carrying electrode structures. The liquid crystal material has the following phases with temperature: isotropic.revreaction.cholesteric.revreaction.chiral smectic.revreaction.solid. The cholesteric pitch is large. The cell walls are surface treated to provide a parallel alignment of liquid crystal molecules. Crossed polarizers are arranged either side of the cell walls, one aligned with its optical axis parallel to the surface alignment of the adjacent cell wall. The device is switched by means of .+-.-d.c. voltage pulses and utilizes the ferro electric effect.

    摘要翻译: 液晶显示器被布置成在其两个可切换状态之一提供非常低的最小光传输。 这使得它对于快门(图1)和用于高对比度数字显示器(图2)是有用的。 在携带电极结构的两个电池壁之间包含一层手性近晶液晶材料。 液晶材料具有以下温度:各向同性 - >胆固醇 - >手性近晶 - >固体。 胆甾醇沥青很大。 细胞壁被表面处理以提供液晶分子的平行取向。 交叉的偏振器布置在单元壁的任一侧,一个对准其光轴平行于相邻单元壁的表面对准。 该设备通过+ / - d.c进行切换。 电压脉冲并利用铁电效应。