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    • 86. 发明授权
    • Chiral compounds and their use as chiral dopants for producing cholesteric liquid crystal compositions
    • 手性化合物及其作为手性掺杂剂用于生产胆甾型液晶组合物的用途
    • US06468444B1
    • 2002-10-22
    • US09531468
    • 2000-03-20
    • Frank MeyerPeter SchuhmacherFrank Prechtl
    • Frank MeyerPeter SchuhmacherFrank Prechtl
    • C09K1936
    • A61K8/0295A61Q17/04C09K19/00C09K19/0422C09K19/2014C09K19/588C09K2019/0448C09K2019/3095
    • Chiral dopants of the formula I Z1—Y1—(A1)m—Y2—M—Y3—X—Y4—(A2)n—Y5—Z2  I in which the variables have, independently of one another, the following meanings: A1 and A2 a spacer with a chain length of 1 to 30 carbon atoms; Y1 to Y5 a chemical bond, —O—, —S—, —C(═O)—, —C(═O)—O—, —O—C(═O)—, —CH═CH—C(═O)—O—, —O—C(═O)—O—, —C(═O)—N(R)— or —(R)N—C(═O)—, —CH2—O—, —O—CH2—, —CH═N—, —N═CH— or —N═N—; M a mesogenic group; R hydrogen, C1-C4-alkyl; Z1 and Z2 hydrogen, C1-C4-alkyl, a polymerizable group or a radical having a polymerizable group; x a dianhydrohexitol residue selected from the group consisting of dianhydrosorbitol, dianhydromannitol and dianhydroiditol; m/n 0 or 1, where the radicals Z1, Z2, Y1 to Y5, A1 and A2 can be identical or different, and at least one Z1 or Z2 radical is a polymerizable group or a radical having a polymerizable group, and their use as chiral dopants for producing cholesteric liquid crystal compositions which can be employed as UV filters in cosmetic and pharmaceutical preparations.
    • 变量具有彼此独立的以下含义的式Iin的手性掺杂剂:具有1至30个碳原子的链长的A1和A2a间隔基; Y1至Y5a化学键,-O - , - S - , - C(= O) - , - C(= O)-O-,-OC(= O) - , - CH = CH-C(= O)-O-,-OC(= O) C(= O)-N(R) - 或 - (R)NC(= O) - , - CH 2 -O-,-O-CH 2 - , - CH = N-,-N = CH-或-N = N-; M是介晶基团; R氢,C1-C4-烷基; Z1和Z2H2,C1-C4-烷基,可聚合基团或具有可聚合基团的基团; xa二脱水己糖醇残基,其选自二脱水山梨糖醇,二脱水甘露糖醇 和二氨基甲醇; m / n 0或1,其中基团Z 1,Z 2,Y 1至Y 5,A 1和A 2可以相同或不同,并且至少一个Z 1或Z 2基团是可聚合基团或具有可聚合基团的基团, 以及它们作为用于生产胆甾型液晶组合物的手性掺杂剂的用途,其可用作化妆品和药物制剂中的UV过滤器。
    • 87. 发明授权
    • Multi-domain liquid-crystal display device
    • 多域液晶显示装置
    • US5936692A
    • 1999-08-10
    • US90004
    • 1998-06-02
    • Peter Van De Witte
    • Peter Van De Witte
    • G02F1/137C09K19/02G02F1/13G02F1/1337G09F9/30G09F9/35
    • G02F1/133753C09K2019/3095
    • The invention relates to a multi-domain liquid-crystal display device comprising two substantially parallel substrates which are provided with an electrode layer and an orientation layer. A layer of a nematically ordered liquid-crystalline material comprising a chiral dopant is sandwiched between the substrates. The layer is structured in such a manner that the pixels of the layer are composed of at least two types of sub-pixels in which the twist senses of the liquid-crystalline material are mutually opposite. This construction in accordance with the invention is achieved by differentiating the composition of the chiral dopant in the different types of sub-pixels. This is attained by employing isomerizable chiral dopants and/or diffusion techniques in combination with local exposure of the liquid-crystal layer. The invention also provides methods of manufacturing such multi-domain liquid-crystal display devices. The multi-domain liquid-crystal display devices in accordance with the invention are easier to manufacture than display devices in which the orientation layers must be structured.
    • 本发明涉及一种多畴液晶显示装置,它包括两个基本平行的基片,它们设有电极层和取向层。 包含手性掺杂剂的有选择的液晶材料层夹在基板之间。 该层被构造成使得该层的像素由至少两种类型的子像素组成,其中液晶材料的扭转感相互相反。 根据本发明的这种结构通过区分不同类型的子像素中的手性掺杂剂的组成来实现。 这通过与液晶层的局部曝光结合使用异构化手性掺杂剂和/或扩散技术来实现。 本发明还提供了制造这种多畴液晶显示装置的方法。 根据本发明的多畴液晶显示装置比其中必须构成取向层的显示装置更容易制造。