摘要:
A difluorophenyl derivative compound having characteristics of a liquid crystal represented by the following general formula (1), a liquid crystal composition and a liquid crystal display device in which the composition is used: wherein R0 is an alkyl group or an alkenyl group having 1 to 15 carbon atoms, and an optional methylene group in the alkyl group or the alkenyl group may be substituted by an oxygen atom; A1 and A2 are each a trans-1,4-cyclohexylene group, or one group selected from the group consisting of a 1,4-phenylene group, a pyrimidine-2,5-diyl group, a pyridine-2,5-diyl group, a 1,3-dioxane-2,5-diyl group, a tetrahydropyran-2,5-diyl group, a 1,3-dithian-2,5-diyl group and a tetrahydrothiopyran-2,5-diyl in which one or more hydrogen atoms on a six-membered ring may be substituted by halogen atoms; Z1 and Z2 are each —(CH2)4—, —(CH2)3O—, —O(CH2)3— or a single bond; and X1 and X2 are each H, F, Cl or Br.
摘要:
The present invention provides liquid crystalline compounds having a high voltage holding ratio and a remarkably high &Dgr;&egr; value, electric and chemical stability, and having good compatibility with known liquid crystalline compounds, liquid crystal compositions containing the compound, and liquid crystal display devices constituted by using the compounds. The liquid crystalline compounds of the present invention are particular dioxane derivatives represented by general formula (1). Further, the present invention relates to liquid crystal compositions characterized in that the compositions comprise at least one of the derivatives, and liquid crystal display devices constituted by using the compositions.
摘要:
Disclosed are (a) liquid crystalline compounds which are essential as component of the liquid crystal compositions, are excellent in miscibility with other liquid crystal compositions, particularly in the miscibility at low temperatures, and expressed by the general formula (1) wherein R0 and R1 independently represent an alkyl group having 1 to 10 carbon atoms; ring A0, ring A1, ring A2, and ring A3 represent 1,4-cyclohexylene group, 1,3-dioxane-2,5-diyl group, 1,4-phenylene group in which one or more hydrogen atoms on the ring may be represented by a halogen atom or R2O group, pyridine-2,5-diyl group, or pyrimidine-2,5-diyl group; Z0, Z1, Z2, and Z3 represent —CH2CH2—, —CH═CH—, —C≡C—, —CH2O—, —OCH2—, —CF2O—, —OCF2—, —COO—, —OCO—, —(CH2)4—, or single bond; Q1 and Q2 represent hydrogen atom or a halogen atom; Q3 represents hydrogen atom, a halogen atom, or R2O group; R2 represents an alkyl group having 1 to 10 carbon atoms; Y represents a halogen atom, cyano group, or an alkyl group having 1 to 10 carbon atoms; l, m, n and o are 0, 1, or 2 with the proviso that 1≦l+m+n+o≦3; and the atom which constitutes this compound may be replaced by its isotope; and (b) liquid crystal display devices fabricated by using the liquid crystal composition.
摘要翻译:公开了(a)作为液晶组合物成分必不可少的液晶性化合物,与其他液晶组合物的混合性优异,特别是在低温下的混溶性中,由通式(1)表示,其中R 0和R 1 独立地表示碳原子数1〜10的烷基。 环A0,环A1,环A2和环A3表示1,4-亚环己基,1,3-二恶烷-2,5-二基,环中的一个或多个氢原子的1,4-亚苯基 由卤素原子或R 2 O基团,吡啶-2,5-二基或嘧啶-2,5-二基表示; Z0,Z1,Z2和Z3表示-CH2CH2-,-CH = CH-,-C = C-,-CH2O-,-OCH2-,-CF2O-,-OCF2-,-COO-,-OCO-, (CH 2)4 - 或单键; Q1和Q2表示氢原子或卤素原子; Q3表示氢原子,卤素原子或R2O基团; R 2表示碳原子数1〜10的烷基。 Y表示卤素原子,氰基或碳原子数1〜10的烷基。 l,m,n和o分别为0,1或2,条件是1 <= 1 + m + n + o = 3; 构成该化合物的原子可以被其同位素代替; 和(b)使用该液晶组合物制造的液晶显示装置。
摘要:
Liquid crystalline compounds are provided which have an extremely high voltage holding ratio, altered only slightly by change of temperature, and which have a low threshold voltage and a high &Dgr;n. Also provided are liquid crystal compositions containing the liquid crystalline compound; and liquid crystal display devices containing the liquid crystal composition. The liquid crystalline compound is expressed by the general formula (1) wherein R, Y1 to Y16, X and Z1 to Z3 are defined in claim 1.
摘要:
Liquid crystalline compounds superior in having an eminent dielectric anisotropy, being stable against environment and having improved miscibility with other liquid crystalline compounds, as well as a liquid crystal composition with driving-ability at a low voltage and responsibility at a high-speed comprising the compounds as a constituting component, and a liquid crystal display element comprising the composition are provided, said compounds are fluoroalkoxybenzene derivatives expressed by the general formula (1) wherein A1, A2 and A3 each independently denote trans-1,4-cyclohexylene,1,4-phenylene or so; B, B2 and B3 each independently denote a single bond, 1,2-ethylene or so; R denotes an alkyl group having 1 to 15 carbon atoms optionally substitutable with a halogen atom(s); Rf denotes a fluoroalkyl group having 1 to 3 carbon; k, m, and n each independently denote 0 or 1; with the proviso that when k=0 is a case, then one of B1, B2 and B3 is a methyleneoxy bond or so, and that when m+n≧1 is a case, then dependency of A1, A2 and A3 is partly restricted and content of Rf is partly limited when B1 or/and B2 and B3 are all single bonds.
摘要:
A compound expressed by the general formula (1): wherein R1 denotes an alkyl group having from 1 to 20 carbon atoms in which one or more methylene groups in said group may be replaced by oxygen atoms or —CH═CH— and one or more hydrogen atoms in said group may be replaced by flourine or chlorine atoms, with the proviso that two or more methylene groups may not be continuously replaced by oxygen atoms, Y1 denotes an alkoxy group having 1 to 5 carbon atoms, in which at least one hydrogen atom is replaced by a fluorine atom and one or more hydrogen atoms may be further replaced by chlorine atoms, Z1, Z2 and Z3 each independently denote a covalent bond, —CH2CH2—, —CH═CH—, —COO— or —CF2)—, with the proviso that at least one of Z1, Z2 and Z3 is —COO— or —CF2O—, rings A1, A2, A3 and A4 each independently denote trans-1,4-cyclohexylene, 3-cyclohexen-1,4-ylene, 3-fluoro-3-cyclohexen-1,4-ylene, pyrimidine-2,5-diyl, 1,3-dioxan-2,5-diyl, trans-1-sila-1,4-cyclohexylene, trans-4-sila-1,4-cyclohexylene, or 1,4-phenylene in which one or more hydrogen atoms may be replaced by fluorine atoms or chlorine atoms, and m and n denote 0 or 1, with the proviso that when Z1, Z2 or Z3 is —CF2O—, then at least two groups selected from rings A1, A2, A3 and A4 directly bonded to —CF2O— are both 1,4-phenylene in which one or more hydrogen atoms may be replaced by fluorine atoms or chlorine atoms, and any of the rings A1, A2 and A3 bonded with the carbon atoms of —CF2O— is 1,4-phenylene in which at least one hydrogen atom is replaced by fluorine or chlorine atoms.
摘要:
A compound expressed by the general formula (1): whereinR.sup.1 denotes an alkyl group having 1 to 20 carbon atoms in which one or more methylene groups in said group may be replaced by oxygen atoms or --CH.dbd.CH-- and one or more hydrogen atoms in said group may be replaced by fluorine or chlorine atoms, with the proviso that two or more methylene groups may not be continuously replaced by oxygen atoms;Y.sup.1 denotes a halogen atom, CN, CF.sub.3, CHF.sub.2 or an alkoxy group having 1 to 5 carbon atoms, in which at least one hydrogen atom is replaced by a fluorine atom and one or more hydrogen atoms may be further replaced by chlorine atoms;Z.sup.1, Z.sup.2 and Z.sup.3 each independently denote a covalent bond, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH-- or CF.sub.2 O--, with the proviso that at least one of Z.sup.1, Z.sup.2, and Z.sup.3 is --CF.sub.2 O--;rings A.sup.1, A.sup.2 and A.sup.3 each independently denote trans-1,4-cyclohexylene, 3-cyclohexene-1,4-ylene, 3-fluoro-3-cyclohexene-1,4-ylene, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl, trans-1-sila-1,4-cyclohexylene, trans-4-sila-1,4-cyclohexylene or 1,4-phenylene in which one or more hydrogen atoms may be replaced by fluorine atoms or chlorine atoms,with the proviso thatring A.sup.1, A.sup.2 or A.sup.3 bonded with the carbon atom of --CF.sub.2 O-- is a member selected from the group consisting of trans-1,4-cyclohexylene, 3-cyclohexene-1,4-ylene, and 3-fluoro-3-cyclohexene-1,4-ylene;ring A.sup.4 denotes 1,4-phenylene in which one or more hydrogen atoms may be replaced by fluorine atoms or chlorine atoms; andm and n each independently denote 0 or 1.
摘要:
There is provided a liquid crystal composition in particular with a low threshold voltage and a wide range of nematic phase temperature (with high TNI point and low TC), while satisfying various properties required for liquid crystal compositions for active matrix type liquid crystal display elements. The composition contains, for example, compounds represented by general formulas (1-1) and (2-1): ##STR1## where each R.sub.1 independently represents an alkyl group having 1 to 10 carbon atoms; X.sub.1 represents H or F; and each X.sub.2 independently represents F, OCF.sub.3, CF.sub.3, or OCF.sub.2 H.
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:
A compound represented by the general formula (1) wherein R1 is an alkadienyl group having 4 to 10 carbon atoms in which a hydrogen atom may be substituted by a fluorine atom or the like; R2 is an alkenyl group having 2 to 10 carbon atoms in which a hydrogen atom may be substituted by a fluorine atom or the like; one or more non-adjacent methylene groups (—CH2—) in the alkadienyl group or the alkenyl group may be replaced by —O— or the like; rings A1, A2, A3 and A4 are each 1,4-cyclohexylene, 1,4-phenylene or the like in which a hydrogen atom may be substituted by a halogen atom; Z1, Z2 and Z3 are each a single bond, —CH2CH2—, —CF═CF— or the like; p and q are each 0 or 1. The above compound has a large elastic constant ratio, steep electro-optic characteristics and a little temperature dependence in a low temperature range, and so it is useful for the manufacture of a liquid crystal display device.