FLUORINATED ALKYL ETHER COMPOUNDS, LIQUID-CRYSTAL COMPOSITIONS, AND LIQUID-CRYSTAL DISPLAY DEVICES
    5.
    发明公开
    FLUORINATED ALKYL ETHER COMPOUNDS, LIQUID-CRYSTAL COMPOSITIONS, AND LIQUID-CRYSTAL DISPLAY DEVICES 失效
    FLUORIERTE ALKYLETHER,FLÜSSIGKRISTALLINEZUSAMMENSETZUNGEN,SOWIEFLÜSSIGKRISTALLINESICHTANZEIGEN

    公开(公告)号:EP0926120A1

    公开(公告)日:1999-06-30

    申请号:EP97924341.7

    申请日:1997-06-06

    摘要: Liquid-crystal compounds which are excellent in compatibility with other liquid-crystal materials particularly even at low temperatures, have a high voltage retention and a low threshold voltage, are lowered in the temperature dependence of these characteristic values, have a high Δn value, and exhibit liquid-crystal properties over a wide temperature range, the compounds being represented by the general formula: R a -A 1 -Z 1 -A 2 -Z 2 -(-A 3 -Z 3 -) m -A 0 -Rf (wherein m is 0 or 1; A 0 , A 1 , A 2 and A 3 are each a six-membered ring, with A 0 being 1,4-phenylene which may be substituted with one to three fluorine and/or chlorine atoms and A 1 , A 2 and A 3 being selected each independently from among trans-1,4-cyclohexane, optionally halogenated 1,4-phenylene, cyclohexene-1,4-diyl and 1,3-dioxane-2,5-diyl; Z 1 , Z 2 and Z 3 are each independently a bridge between rings and selected from among -(CH 2 ) 2 -, -(CH 2 ) 4 -, -CH 2 O-and -OCH 2 - which may be halogenated, and single bond (-); Rf is -OCF 2 CF 2 H or -OCF 2 CFHCF 3 ; and Ra is a C 1 -C 20 linear or branched monovalent organic group); liquid-crystal compositions comprising at least one of the compounds; and liquid-crystal display devices made by using the compositions.

    摘要翻译: 与其他液晶材料的相容性优异,特别是即使在低温下也具有高电压保持和低阈值电压的液晶化合物在这些特性值的温度依赖性方面降低,具有高DELTA n值, 并且在宽的温度范围内具有液晶性能,该化合物由通式表示:Ra-A1-Z1-A2-Z2 - ( - A3-Z3-)m-A0-Rf(其中m为0或1 A 0,A 1,A 2和A 3分别为六元环,A 0为可被1〜3个氟原子和/或氯原子取代的1,4-亚苯基,A1,A2和A3各自独立地选自 反式-1,4-环己烷,任选卤代的1,4-亚苯基,环己烯-1,4-二基和1,3-二恶烷-2,5-二基; Z 1,Z 2和Z 3各自独立地为环之间的桥, 可以被卤化的 - (CH 2)2 - , - (CH 2)4 - , - CH 2 O-和-OCH 2 - ,和单键( - ); R f是-OCF 2 CF 2 H或-OCF 2 CFHCF 3; Ra为C1-C20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; 以及使用该组合物制成的液晶显示装置。

    ALPHA,ALPHA-DIFLUOROBENZYL ETHER DERIVATIVES, LIQUID CRYSTAL COMPOSITIONS, AND LIQUID CRYSTAL DISPLAY DEVICES
    6.
    发明公开
    ALPHA,ALPHA-DIFLUOROBENZYL ETHER DERIVATIVES, LIQUID CRYSTAL COMPOSITIONS, AND LIQUID CRYSTAL DISPLAY DEVICES 失效
    ALPHA,ALPHA-DIFLUORBENZYLETHER-DERIVATE,FLÜSSIGKRISTALLINEZUSAMMENSETZUNGEN UNDFLÜSSIGKRISTALLINESANZEIGEELEMENT

    公开(公告)号:EP0893424A1

    公开(公告)日:1999-01-27

    申请号:EP97915683.3

    申请日:1997-04-09

    摘要: An object of the invention is to provide novel liquid crystalline compounds which 1) exhibit a low threshold voltage, 2) have a low viscosity, 3) maintain or lower dielectric anisotropy of liquid crystal compositions when added thereto, and further are excellent in miscibility with other known liquid crystalline compounds, particularly excellent in the miscibility at low temperatures; to provide liquid crystal compositions comprising the compound; and to provide liquid crystal display devices comprising the composition; and the liquid crystalline compounds are α, α-difluorobenzyl ether derivatives expressed by the general formula (1)
    wherein R 1 represents a straight chain or branched alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms one or not-adjacent two or more CH 2 groups in the alkyl or alkenyl group may be replaced by oxygen atom; ring A and ring B independently represent 1,4-cyclohexylene group one or more CH 2 groups on the ring may be replaced by oxygen atom or sulfur atom, or 1,4-phenylene group one or more CH groups on the ring may be replaced by nitrogen atom, and one or more hydrogen atoms on the ring may be replaced by a halogen atom; ring C and ring D independently represent 1,4-phenylene group one or more hydrogen atoms on the ring may be replaced by a halogen atom; Z 1 , Z 2 , and Z 3 independently represent -CH 2 CH 2 -, -CH=CH-, -C≡C-, or single bond; X represents a halogen atom, CF 3 , OCF 3 , OCHF 2 , or CN; Y represents hydrogen atom or a halogen atom; ℓ and m are 0 or 1; ℓ + m ≦ 1 ; and an element which constitutes the compound may be replaced by its isotope.

    摘要翻译: 本发明的目的是提供一种新的液晶化合物,其具有低阈值电压,2)具有低粘度,3)当添加时保持或降低液晶组合物的介电各向异性,并且与 其他已知的液晶化合物,在低温下的混溶性特别优异; 以提供包含该化合物的液晶组合物; 并提供包含该组合物的液晶显示装置; 液晶化合物是由通式(1)表示的α,α-二氟苄醚衍生物,其中R 1表示碳原子数1〜15的直链或支链烷基或具有2〜 烷基或烯基中的一个或不相邻的两个或更多个CH 2基团的15个碳原子可被氧原子取代; 环A和环B独立地表示1,4-亚环己基,环上的一个或多个CH 2基可以被氧原子或硫原子代替,或1,4-亚苯基可以被环上的一个或多个CH基取代 氮原子和环上的一个或多个氢原子可以被卤素原子取代; 环C和环D独立地表示1,4-亚苯基,环上的一个或多个氢原子可被卤素原子取代; Z 1,Z 2和Z 3独立地表示-CH 2 CH 2 - , - CH = CH - , - C≡C-或C- X表示卤素原子,CF 3,OCF 3,OCHF 2或CN; Y表示氢原子或卤素原子; l和m为0或1; 1 + m <1; 并且构成化合物的元素可以被其同位素代替。

    LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY
    10.
    发明授权
    LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY 失效
    FLÜSSIGKRISTALLZUSAMMENSETZUNGUNDFLÜSSIGKRISTALLANZEIGEVORRICHTUNG

    公开(公告)号:EP0786509B1

    公开(公告)日:2001-09-12

    申请号:EP95934294.0

    申请日:1995-10-13

    摘要: A liquid crystal composition which not only satisfies various characteristics required of liquid crystal compositions for AM-LCD, but also particularly has an improved low-temperature compatibility, a suitably increased Δn value, and lowered Vth and viscosity. The composition contains at least one compound represented by general formula (I-1) or (I-2) as a first component and at least one compound represented by any of the general formulae (II-1) to (II-7) as a second component, (wherein n represents an integer of 1 to 10; Z1 represents -CH¿2?CH2- or a single bond; X represents F or OCH3; Y represents H or F; and m represents 0 or 1). The composition is useful as a low-voltage liquid crystal material of various modes including active matrix and STN systems.

    摘要翻译: 提供液晶组合物,其在低温下具有特别优异的混溶性,适当大的DELTA n和小的V @ @和粘度,同时满足AM-LCD液晶组合物所需的若干特性。 公开了含有作为第一成分的至少一种由通式(I-1)或(I-2)表示的化合物,并且含有至少一种由下列化合物表示的化合物作为第二成分的液晶组合物: 通式(II-1)〜(II-7) 其中n为1〜10的整数,Z 1表示-CH 2 CH 2 - 或单键,X表示F或OCF 3,Y表示H 或F,m为0或1.本发明的液晶组合物可用作有源矩阵模式和STN模式等多种模式的低电压液晶材料。