Phenyldioxane derivatives, liquid crystal compositions, and liquid
crystal display elements
    65.
    发明授权
    Phenyldioxane derivatives, liquid crystal compositions, and liquid crystal display elements 失效
    苯基二恶烷衍生物,液晶组合物和液晶显示元件

    公开(公告)号:US5858272A

    公开(公告)日:1999-01-12

    申请号:US893237

    申请日:1997-07-15

    摘要: There is provided an electrically and chemically stable liquid crystalline compound which exhibits a significantly large value of De and a high voltage holding ratio. The compound is a phenyldioxane derivative represented by formula (1): ##STR1## wherein R represents a C1-C20 alkyl group; each of n1 and n2 represents 0 or 1; each of Q.sub.1 through Q.sub.6 represents a hydrogen atom, a fluorine atom, or a chlorine atom, provided that Q.sub.3 is a fluorine atom or a chlorine atom when n2 is 0, and that at least one of Q.sub.1 and Q.sub.3 is a fluorine atom or a chlorine atom when n2 is 1; each of Za and Zb represents a single bond, --COO--, or --CF.sub.2 O--; Zc represents a single bond or --CH.sub.2 CH.sub.2 --; Y represents a hydrogen atom, a halogen atom, or a C1-C5 halogenated alkyl group in which one or more non-adjacent methylene groups may be replaced by oxygen atoms or sulfur atoms; and each of the elements that constitute the compound may comprise isotopes of the element. The compound also exhibits excellent compatibility with previously known liquid crystalline compounds, and is advantageously used for low voltage driving of liquid crystal displays for TFTs. There are also provided liquid crystal compositions comprising the compound, as well as liquid crystal display elements constructed of the compositions.

    摘要翻译: 提供了电化学稳定的液晶化合物,其表现出显着的De值和高电压保持率。 化合物是由式(1)表示的苯基二恶烷衍生物:其中R表示C1-C20烷基; n1和n2各自表示0或1; Q1至Q6中的每一个表示氢原子,氟原子或氯原子,条件是当n2为0时Q3为氟原子或氯原子,并且Q1和Q3中的至少一个为氟原子或 n2为1时为氯原子; Za和Zb各自表示单键-COO-或-CF2O-; Zc表示单键或-CH2CH2-; Y表示一个或多个不相邻的亚甲基可以被氧原子或硫原子代替的氢原子,卤素原子或C1-C5卤代烷基; 并且构成化合物的每个元素可以包括元素的同位素。 该化合物还与先前已知的液晶化合物具有优异的相容性,并且有利地用于TFT的液晶显示器的低电压驱动。 还提供了包含该化合物的液晶组合物以及由该组合物构成的液晶显示元件。

    Liquid crystalline compound and liquid crystal composition
    68.
    发明授权
    Liquid crystalline compound and liquid crystal composition 失效
    液晶化合物和液晶组合物

    公开(公告)号:US5534187A

    公开(公告)日:1996-07-09

    申请号:US410297

    申请日:1995-03-24

    摘要: A liquid crystalline compound expressed by the formula ##STR1## wherein R.sub.1 represents an alkyl group of 1 to 12 carbon atoms, and one or two not adjacent CH.sub.2 group excluding the terminal in this group may be replaced by --CO-- group, --OCO-- group, --COO-- group or --CH.dbd.CH group; X and Z each represents H, F or Cl; Y represents perfluoroalkyl group or perfluoroalkyloxy group of 1 to 4 carbon atoms, and one or two F atoms in this group may be replaced by H; one of A, B and C represents cyclohexene ring and the others thereof are chosen from among covalent bond or cyclohexane group and benzene ring and these rings may be substituted by F or Cl; and l, m and n each are 0 or 1, independently of each other, but when m=0, then l=0. It is possible to provide a liquid crystal composition having a large .DELTA.n, a low viscosity and a high voltage-holding ratio, and exhibiting a nematic liquid crystal phase within a broad temperature range and having a very high .DELTA..epsilon. and a low driving voltage, and preferably used for TFT. Further it is possible to provide a novel liquid crystalline compound preferred as a component for the liquid crystal composition.

    摘要翻译: 由式(1)表示的液晶化合物可以被-CO-基团取代,其中R 1表示1〜12个碳原子的烷基,除了该基团末端以外的一个或两个不相邻的CH2基团, -COO-基,-COO-基或-CH = CH基; X和Z各自表示H,F或Cl; Y表示1〜4个碳原子的全氟烷基或全氟烷氧基,该基团中的一个或两个F原子可以被H代替; A,B和C之一表示环己烯环,其它选自共价键或环己烷基和苯环,这些环可被F或Cl取代; 并且l,m和n各自为0或1,彼此独立,但是当m = 0时,则l = 0。 可以提供一种具有大的DELTA n,低粘度和高电压保持率的液晶组合物,并且在宽温度范围内显示向列型液晶相并具有非常高的DELTAε和低驱动电压 ,优选用于TFT。 此外,可以提供作为液晶组合物的成分优选的新型液晶化合物。

    Liquid-crystal compounds having large negative value of permittivity anisotropy, liquid-crystal composition, and liquid-crystal display element
    70.
    发明授权
    Liquid-crystal compounds having large negative value of permittivity anisotropy, liquid-crystal composition, and liquid-crystal display element 有权
    具有大的介电常数各向异性负值的液晶化合物,液晶组合物和液晶显示元件

    公开(公告)号:US06348244B1

    公开(公告)日:2002-02-19

    申请号:US09529989

    申请日:2000-04-24

    IPC分类号: C09K1934

    摘要: An object of the present invention is to provide novel liquid crystalline compounds having a negative and extremely large dielectric anisotropy value and a small optical anisotropy value together, to provide liquid crystal compositions comprising the liquid crystalline compound, and to provide liquid crystal display devices fabricated by using the liquid crystal composition; the liquid crystalline compounds have 2,3-difluorophenyl moiety and are expressed by the general formula (1) wherein Ra and Rb each independently represent a straight chain or branched alkyl group having 1 to 10 carbon atoms in which group any methylene group may be replaced by —O—, —CH═CH—, or —C≡C—, but there is not a case wherein —O— continues; ring A1 represents cyclohexane-1,4-diyl not adjacent any methylene group may be replaced by —O—; ring A2 represents 2,3-difluoro-1,4-phenylene in which phenylene hydrogen atoms at 5-position and 6-position may each independently be replaced by fluorine atoms; Z1 and Z2 each independently represent single bond or —CH2CH2—; Xa, Xb, Xc, and Xd each independently represent hydrogen atom, fluorine atom, or chlorine atom, but at least one of Xa, Xb, Xc, and Xd is fluorine atom or chlorine atom and any atom 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具有负极大且非常大的介电各向异性值和小的光学各向异性值的新的液晶化合物,以提供包括液晶化合物的液晶组合物,并提供由 使用液晶组合物; 液晶化合物具有2,3-二氟苯基部分,并且由通式(1)表示,其中Ra和Rb各自独立地表示具有1-10个碳原子的直链或支链烷基,其中任何亚甲基可以被取代 通过-O-,-CH = CH-或-C = C-,但不存在-O-继续的情况; 环A1表示不相邻的环己烷-1,4-二基,任何亚甲基都可以被-O-取代; 环A2表示其中5-位和6-位上的亚苯基氢原子各自独立地被氟原子代替的2,3-二氟-1,4-亚苯基; Z 1和Z 2各自独立地表示单键或-CH 2 CH 2 - ; Xa,Xb,Xc和Xd各自独立地表示氢原子,氟原子或氯原子,但Xa,Xb,Xc和Xd中的至少一个为氟原子或氯原子,构成该化合物的任何原子均可被取代 通过其同位素。