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    • 2. 发明授权
    • Liquid crystal device
    • 液晶装置
    • US06577363B1
    • 2003-06-10
    • US09381505
    • 1999-09-21
    • Guy P Bryan-BrownIan C SageEmma L Wood
    • Guy P Bryan-BrownIan C SageEmma L Wood
    • G02F11336
    • G02F1/1396G02F1/13363G02F1/13471G02F1/1393
    • A liquid crystal device comprises a cell (1) formed by a layer (2) of nematic or long pitch cholesteric liquid crystal material contained between two cell walls (3, 4). One wall (4) carries a surface treatment giving a first azimuthal alignment direction with or without a surface pretilt to liquid crystal molecules. The other wall (3) carries a surface treatment capable of separately providing both a preferred, substantially homeotropic alignment of the adjacent liquid crystal, and a defined azimuthal second alignment direction to the adjacent liquid crystal dependant upon liquid crystal molecular arrangement. The first and second alignment directions are approximately orthogonal. Polarisers (13, 14) may be arranged on either side of the cells walls with their polarization axes parallel or perpendicular to the two azimuthal directions. In addition one or more birefringent compensator layers (19, 20) are disposed on one side or on both sides of the cell (1). The compensator layers (19, 20) may be formed of aligned polymer layers, or aligned liquid crystal material, either in a liquid form in a cell, or dispersed in a polymer sheet, or sheets of quartz or calcite slices. The device operates between two different voltage levels, one level (V1) providing a non twisted liquid crystal molecular arrangement, the other and higher voltage (V2) providing a twisted molecular arrangement.
    • 液晶装置包括由包含在两个单元壁(3,4)之间的向列型或长距离胆固醇型液晶材料层(2)形成的单元(1)。 一个壁(4)承载表面处理,给出具有或不具有预倾斜到液晶分子的表面的第一方位取向方向。 另一个壁(3)承载表面处理,其能够依赖于液晶分子排列,分别提供相邻液晶的优选的基本垂直取向和相邻液晶的定义的方位角第二取向方向。 第一和第二取向方向近似正交。 偏振器(13,14)可以布置在单元格壁的两侧,其偏振轴平行或垂直于两个方位角方向。 此外,一个或多个双折射补偿层(19,20)设置在电池单元(1)的一侧或两侧。 补偿层(19,20)可以由对准的聚合物层或排列的液晶材料形成,以液体形式存在于电池中,或分散在聚合物片材中,或石英或方解石片材片。 该器件在两个不同的电压电平之间工作,一个电平(V1)提供非扭曲的液晶分子排列,另一个和更高的电压(V2)提供扭曲的分子排列。
    • 9. 发明授权
    • Liquid crystal device
    • 液晶装置
    • US06549256B1
    • 2003-04-15
    • US09117705
    • 1998-08-04
    • Guy P Bryan-BrownCarl V BrownIan C Sage
    • Guy P Bryan-BrownCarl V BrownIan C Sage
    • G02F11337
    • G02F1/1396G02F1/133753G02F1/13725G02F2001/133742
    • A liquid crystal device comprises a layer of nematic or long pitch cholesteric liquid crystal material contained between two cell walls. One wall (A) carries a surface treatment giving a first azimuthal alignment direction with or without a surface pretilt to liquid crystal molecules. The other wall (B) carries a surface treatment (17) capable of separately providing both a preferred, substantially homeotropic alignment of the adjacent liquid crystal, and a defined azimuthal second alignment direction to the adjacent liquid crystal dependent upon liquid crystal molecular arrangement. The first and second alignment directions are approximately orthogonal. Polarisers may be arranged on either side of the cell walls with their polarisation axes parallel or perpendicular to the two azimuthal directions. Alternatively an amount of dichroic dye may be incorporated in the liquid crystal material, and the device operated with one or two polarisers. The device operates between two different voltage levels, one level providing a non twisted liquid crystal molecular arrangement, the other and higher voltage providing a twisted molecular arrangement.
    • 液晶装置包括两个单元壁之间包含的向列型或长距离胆固醇型液晶材料层。 一个壁(A)进行表面处理,给出具有或不具有预倾斜到液晶分子的表面的第一方位取向方向。 另一壁(B)承载能够根据液晶分子排列分别提供相邻液晶的优选的,基本上垂直取向的相对液晶的定向方位第二取向方向的表面处理(17)。 第一和第二取向方向近似正交。 偏振器可以布置在单元壁的任一侧上,其偏振轴平行或垂直于两个方位角方向。 或者,可以在液晶材料中引入一定量的二色性染料,并且该装置用一个或两个偏光镜操作。 该器件在两个不同的电压电平之间工作,一个级别提供非扭曲的液晶分子排列,另一个和更高的电压提供扭曲的分子排列。
    • 10. 发明授权
    • Liquid crystal polymers
    • 液晶聚合物
    • US6030668A
    • 2000-02-29
    • US066460
    • 1998-05-26
    • Alan W HallDavid LaceyIan C SageKeith M BlackwoodMichelle Jones
    • Alan W HallDavid LaceyIan C SageKeith M BlackwoodMichelle Jones
    • C08G61/00C09K19/38C08G61/04C09K19/42G02F1/133
    • C08G61/00C09K19/3895Y10T428/10
    • Compounds of formula ##STR1## are provided which may be used in a variety of devices including liquid crystal devices, piezoelectric devices, pyroelectric devices and in optical recording media, where m=at least 5; and R.sub.x, R.sub.y and R.sub.z are independently from formula (IA), ##STR2## where Y is selected from COO, OCO, O, S, CHOH, CHF, CH.sub.2 ; Q=(CH.sub.2).sub.n wherein one or more non-adjacent methylenes may be replaced by O and n=1-20; Z is selected from O, S, a single covalent bond, COO, a OCO; when Y is CH.sub.2 then n may also be 0; formula (IB) is ##STR3## and represents any mesogenic group; and R.sub.x, R.sub.y and R.sub.z are also independently selected from H, OH, OCOR.sup.1, COOH, CO.sub.2 R.sup.1 (CH.sub.2).sub.p OH, (CH.sub.2).sub.p CO.sub.2 H, --(CH.sub.2).sub.p OR.sup.1 or --(CH.sub.2).sub.p CO.sub.2 R.sup.1 and p=1-20, R.sup.1 =H or C.sub.1-16 alkyl, when R.sup.1 =C.sub.2-16 alkyl the terminal CH.sub.3 group may be replaced by Br or Cl; provided that at least one of and R.sub.x, R.sub.y and R.sub.z is selected from formula (IA).
    • PCT No.PCT / GB96 / 02655 371日期:1998年5月26日 102(e)日期1998年5月26日PCT提交1996年10月31日PCT公布。 公开号WO97 / 16472 日期1997年5月9日提供了可用于液晶装置,压电装置,热电装置以及光记录介质的各种装置中的化合物,其中m =至少5; 并且R x,R y和R z独立地为式(IA),其中Y选自COO,OCO,O,S,CHOH,CHF,CH 2; Q =(CH 2)n,其中一个或多个不相邻亚甲基可被O代替,n = 1-20; Z选自O,S,单一共价键,COO,OCO; 当Y是CH2时,n也可以是0; 式(IB)是并代表任何介晶基团; 并且R x,R y和R z也独立地选自H,OH,OCOR 1,COOH,CO 2 R 1(CH 2)p OH,(CH 2)p CO 2 H, - (CH 2)pOR 1或 - (CH 2)p CO 2 R 1和p = H或C1-16烷基,当R1 = C2-16烷基时,末端CH3基团可被Br或Cl取代; 条件是Rx和R z中的至少一个选自式(IA)。