Liquid crystal compounds having bis(trifluoromethyl) phenyl rings, liquid crystal compositions and liquid crystal display devices
    16.
    发明授权
    Liquid crystal compounds having bis(trifluoromethyl) phenyl rings, liquid crystal compositions and liquid crystal display devices 有权
    具有双(三氟甲基)苯环,液晶组合物和液晶显示装置的液晶化合物

    公开(公告)号:US06844032B2

    公开(公告)日:2005-01-18

    申请号:US10108712

    申请日:2002-03-29

    摘要: The compound (1) having 2,3-bis(trifluoromethyl)-1,4-phenylene is stable chemically and has excellent miscibility with other liquid crystal compounds, large and negative dielectric anisotropy and proper optical anisotropy. A liquid crystal composition comprising the compound has large specific resistance and a large voltage holding ratio, and that the composition is useful for a liquid crystal display element. The compound (1) is represented by formula (1): RaA1—Z1)m—(A2—Z2n—A3—Z3—A4—Rb  (1) wherein Ra and Rb independently are alkyl having 1 to 20 carbons, any —CH2— in the alkyl may be replaced by —O—, —S—, —CH═CH—, or —C≡C—, and any hydrogen may be replaced by halogen; A1, A2, A3, and A4 independently are 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,3-dioxane-2,5-diyl, 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, pyridazine-3,6-diyl, or 2,3-bis(trifluoromethyl)-1,4-phenylene, any hydrogen in these rings may be replaced by halogen, and at least one of A1, A2, A3, and A4 is 2,3-bis(trifluoromethyl)-1,4-phenylene; Z1, Z2 and Z3 independently are a single bond, —(CH2)2—, —(CF2)2—, —COO—, —OCO—, —CH2O—, —OCH2—, —CF2O—, —OCF2—, —CH═CH—, —CF═CF—, —C≡C—, —(CH2)4—, —(CH2)3O—, or —O(CH2)3—; m and n independently are 0 or 1.

    摘要翻译: 具有2,3-双(三氟甲基)-1,4-亚苯基的化合物(1)化学稳定且与其它液晶化合物具有优异的混溶性,具有大的和负的介电各向异性和适当的光学各向异性。 包含该化合物的液晶组合物具有大的电阻率和较大的电压保持率,并且该组合物可用于液晶显示元件。 化合物(1)由式(1)表示:其中R a和R b独立地是具有1至20个碳的烷基,该烷基中的任何-CH 2 - 可以被-O - , - S - , - CH = CH- ,或-C = C-,并且任何氢可以被卤素取代; A1,A2,A3和A4独立地为1,4-亚环己基,1,4-亚环己烯基,1,3-二恶烷-2,5-二基,1,4-亚苯基,吡啶-2,5-二基, 2,5-二基,哒嗪-3,6-二基或2,3-双(三氟甲基)-1,4-亚苯基,这些环中的任何氢可以被卤素取代,并且至少一个A1,A2, A3和A4是2,3-双(三氟甲基)-1,4-亚苯基; Z 1,Z 2和Z 3独立地是单键, - (CH 2)2 - , - (CF 2)2 - , - COO - , - OCO - , - CH 2 O - , - OCH 2 - , - CH = CH-,-CF = CF-,-C = C - , - (CH 2)4 - , - (CH 2)3 O-或-O(CH 2) m和n独立地为0或1。

    Liquid crystalline compounds and mixtures thereof
    17.
    发明授权
    Liquid crystalline compounds and mixtures thereof 失效
    液晶化合物及其混合物

    公开(公告)号:US4596667A

    公开(公告)日:1986-06-24

    申请号:US568060

    申请日:1984-01-04

    CPC分类号: C09K19/2021 C09K19/3068

    摘要: Novel ferroelectric liquid crystalline compounds having a superior stability and chiral, smectic liquid crystalline compositions containing at least one kind of the same are provided, which compounds are expressed by the general formula ##STR1## wherein ##STR2## represents 1,4-phenylene group ##STR3## or 1,4-trans-cyclohexane group ##STR4## R*, an optically active alkyl group; m=o, 1 or 2; n=1 or 2; X, a linear chain or branched alkyl group or alkoxy group, each having 1 to 18 carbon atoms; and when ##STR5## represents ##STR6## m=1; and n=1, X represents a linear chain or branched alkyl group having 1 to 18 carbon atoms or a linear chain alkoxy group having 11 to 18 carbon atoms.

    摘要翻译: 提供了具有优异稳定性的新型铁电液晶化合物和含有至少一种类型的手性的近晶液晶组合物,该化合物由通式(I)表示,其中 亚苯基基团或1,4-反式环己基基团,即光学活性烷基; m = o,1或2; n = 1或2; X,各自具有1至18个碳原子的直链或支链烷基或烷氧基; 当表示 m = 1时; n = 1,X表示碳原子数为1〜18的直链状或支链状的烷基或碳原子数为11〜18的直链状的烷氧基。

    Liquid crystal compositions and liquid crystal display devices
    20.
    发明授权
    Liquid crystal compositions and liquid crystal display devices 有权
    液晶组合物和液晶显示装置

    公开(公告)号:US06682784B2

    公开(公告)日:2004-01-27

    申请号:US10101114

    申请日:2002-03-20

    IPC分类号: C09K1930

    摘要: Liquid crystal compositions having board nematic phase range, low viscosity, low threshold voltage and large pre-tilt angle, while meeting the general properties required for AM-LCD. The compositions contain at least one of the compounds of the formulas (I-1) to (I-3), at least one of the compounds of the formulas (II-1) to (II-4), at least one of the compounds of the formulas (III-1) and (III-2), at least one of the compounds of the formulas (IV-1) to (IV-3), and optionally at least one of the compounds of the formulas (V-1) and (V-2), as described in the specification.

    摘要翻译: 具有板向列相范围,低粘度,低阈值电压和大预倾角的液晶组合物,同时满足AM-LCD所需的一般特性。 所述组合物含有至少一种式(I-1)至(I-3)的化合物,至少一种式(II-1)至(II-4)的化合物,至少一种式 式(Ⅳ-1)至(Ⅳ-3)的化合物中的至少一种,和任选的至少一种式(Ⅴ-Ⅴ)化合物,式 -1)和(V-2),如说明书中所述。