Liquid crystal composition and liquid crystal display device
    1.
    发明授权
    Liquid crystal composition and liquid crystal display device 失效
    液晶组成和液晶显示装置

    公开(公告)号:US5874022A

    公开(公告)日:1999-02-23

    申请号:US927808

    申请日:1997-09-12

    CPC分类号: C09K19/44 C09K19/42

    摘要: The present invention provides a liquid crystal composition satisfying many characteristics required to liquid crystal compositions for AM-LCD, having a preferable .DELTA.n value in proportion to the cell thickness, and having very low threshold value suitable for driving at low voltage.The liquid crystal composition of the present invention comprises as the first constituent at least one compound selected from the group consisting of compounds represented by particular formula (I) and as the second constituent at least one compound selected from the group consisting of compounds represented by particular formulas (II-1)-(II-7). ##STR1##

    摘要翻译: 本发明提供了一种满足AM-LCD液晶组合物所需要的许多特性的液晶组合物,其具有与单元厚度成比例的优选的DELTA n值,并且具有适合于在低电压下驱动的非常低的阈值。 本发明的液晶组合物作为第一组分包含至少一种选自由特定式(I)表示的化合物的化合物和作为第二组分的至少一种化合物,所述化合物选自由特定的 式(II-1) - (II-7)。 (II-1)<图像>(II-2)<图像>(II-2)<图像>(II-3)<图像>(II-4)<图像>(II-5)<图像> (II-6)<图像>(II-7)

    Substituted benzene derivative, liquid crystal composition, and liquid crystal display element
    4.
    发明授权
    Substituted benzene derivative, liquid crystal composition, and liquid crystal display element 有权
    取代苯衍生物,液晶组合物和液晶显示元件

    公开(公告)号:US06579577B2

    公开(公告)日:2003-06-17

    申请号:US09917271

    申请日:2001-07-30

    IPC分类号: C09K1912

    摘要: There is provided a liquid crystalline compound having a high voltage holding ratio which has a very small degree of temperature dependence, a low threshold voltage which has a very small degree of temperature dependence, a high &Dgr;n, and excellent miscibility with other liquid crystal materials at low temperature; a liquid crystal composition; and a liquid crystal display element, and the liquid crystalline compound is a substituted benzene derivative represented by general formula (1), where, R represents a straight chain or branched alkyl group having 1 to 20 carbon atoms in which each of optional and nonadjacent methylene groups (—CH2—) may be substituted by an oxygen atom; X represents a halogen atom, —CF3, —CF2H, —CFH2, —OCF3 or —OCF2H; each of Z1 and Z2 independently represents —(CH2)2—, —(CH2)4—, —CH2O—, —OCH2— or a covalent bond, but Z1 and Z2 are not covalent bonds simultaneously; each of Y1, Y2, Y3, Y4, Y5, and Y6 independently represents H or F, but at least one of Y1, Y2, Y3, and Y4 represents F.

    摘要翻译: 提供了具有非常小的温度依赖性的高电压保持率的液晶化合物,具有非常小的温度依赖性的低阈值电压,高DELTAn和与其它液晶材料的优异的混溶性 低温; 液晶组合物; 和液晶显示元件,液晶化合物是通式(1)表示的取代苯衍生物,其中,R表示碳原子数1〜20的直链或支链烷基,其中任选的和不相邻的亚甲基 基团(-CH 2 - )可以被氧原子取代; X表示卤素原子,-CF 3,-CF 2 H,-CFH 2,-OCF 3或-OCF 2 H; Z 1和Z 2各自独立地表示 - (CH 2)2 - , - (CH 2)4 - , - CH 2 O-,-OCH 2 - 或共价键,但Z 1和Z 2不同时为共价键; Y1,Y2,Y3,Y4,Y5和Y6各自独立地表示H或F,但Y1,Y2,Y3和Y4中的至少一个表示F.

    Fluoro-substituted alkyl ether compounds, liquid crystal compositions
and liquid crystal display devices
    6.
    发明授权
    Fluoro-substituted alkyl ether compounds, liquid crystal compositions and liquid crystal display devices 失效
    氟取代烷基醚化合物,液晶组合物和液晶显示装置

    公开(公告)号:US6124005A

    公开(公告)日:2000-09-26

    申请号:US147387

    申请日:1998-12-14

    摘要: Liquid crystalline compounds which have excellent compatibility with other liquid crystal materials, especially at low temperatures, high voltage holding ratio, low threshold voltage, their small temperature dependency, high .DELTA.n, and broad liquid phase temperature range, the compounds being represented by formula (1)Ra--A.sub.1 --Z.sub.1 --A.sub.2 --Z.sub.2 --(--A.sub.3 --Z.sub.3 --).sub.m --A.sub.0 --Rf (1)(wherein m is 0 or 1; A.sub.0, A.sub.1, A.sub.2 and A.sub.3 represent a six-membered ring, ring A.sub.0 is 1,4-phenylene which may be substituted with 1 to 3 of F and/or Cl, rings A.sub.1, A.sub.2 and A.sub.3, independently of one another, are selected from trans-1,4-cyclohexylene, 1,4-phenylene which may be substituted with one or more halogen atoms, cyclohexene-1,4-diyl or 1,3-dioxane-2,5-diyl; Z.sub.1, Z.sub.2 and Z.sub.3 represent a bridge between the rings and independently of one another, are selected from --(CH.sub.2).sub.2 --, --(CH.sub.2).sub.4 --, --CH.sub.2 O--, --OCH.sub.2 -- bonds, one or more hydrogen atoms in these bonds being optionally substituted with a halogen atom, or a single bond (--); Rf represents --OCF.sub.2 CF.sub.2 H or --OCF.sub.2 CFHCF.sub.3 ; and Ra is a straight- or branched monovalent organic radical of 1 to 20 carbons); liquid crystal compositions comprising at least one of the compounds; and liquid crystal display devices composed of the compositions.

    摘要翻译: PCT No.PCT / JP97 / 01936 Sec。 371 1998年12月14日第 102(e)1998年12月14日日期PCT 1997年6月6日PCT公布。 公开号WO97 / 47576 日期1997年12月18日与其他液晶材料具有优异相容性的液晶化合物,特别是在低温下,高电压保持率,低阈值电压,低温依赖性,高DELTA n和宽液相温度范围,化合物 (1)Ra-A1-Z1-A2-Z2 - ( - A3-Z3-)m-A0-Rf(1)(其中m为0或1; A0,A1,A2和A3表示六 环A0是可被1至3个F和/或Cl取代的1,4-亚苯基,A1,A2和A3环,彼此独立地选自反式-1,4-亚环己基, 可被一个或多个卤素原子取代的1,4-亚苯基,环己烯-1,4-二基或1,3-二恶烷-2,5-二基; Z 1,Z 2和Z 3表示环之间的桥, 另一个选自 - (CH 2)2 - , - (CH 2)4 - , - CH 2 O - , - OCH 2 - 键,这些键中的一个或多个氢原子任选被卤素原子或单键 - ); Rf代表 目的-OCF2CF2H或-OCF2CFHCF3; 和Ra是1至20个碳的直链或支链一价有机基团); 包含至少一种化合物的液晶组合物; 以及由该组合物构成的液晶显示装置。