摘要:
A liquid crystal composition which comprises at least one phenylbenzoate derivative represented by formula (1) ##STR1## wherein R.sub.1 is a hydrogen atom or an alkyl group of 1-10 carbons and others; X is a hydrogen atom or a halogen atom; A and B each independently represent a 1,4-phenylene group or a trans-1,4-cyclohexylene group and others; Z.sub.1 and Z.sub.2 each independently represent --CH.sub.2 CH.sub.2 --, --CO--O--, a covalent bond and others; m and n each independently represent 0 or 1.
摘要:
A liquid crystal composition which comprises at least one phenylbenzoate derivative represented by formula (1) wherein R1 is a hydrogen atom or an alkyl group of 1-10 carbons and others; X is a hydrogen atom or a halogen atom; A and B each independently represent a 1,4-phenylene group or a trans-1,4-cyclohexylene group and others; Z1 and Z2 each independently represent —CH2CH2—, —CO—O—, a covalent bond and others; m and n each independently represent 0 or 1.
摘要:
A liquid crystal composition which comprises as a first component at least one or more compounds represented by formula (1') ##STR1## wherein n represents an integer of 1-10; X represents H or F; or m represents 1 or 2 and as a second component at least one or more compounds represented by formulas (2-1) to (2-5) in which n represents an integer of 1-10. ##STR2##
摘要:
As a liquid crystal compound, a dicyclohexylethylene derivative, which has a wide liquid crystal phase temperature range, a low viscosity, a large .DELTA..epsilon. value, a high stability, and an excellent compatibility with other liquid crystal compounds. The dicyclohexylethylene derivative is represented by general formula (I), ##STR1## wherein R represents C.sub.1 -C.sub.10 linear alkyl; and X represents fluorine or trifluoromethyl. This compound can widen the working range of a liquid crystal display element because of its high NI point, can improve the response speed of the display element because of its low viscosity, and can lower the voltage for driving the display element because of its high positive .DELTA..epsilon. value. Furthermore, it is so stable against changes in environmental factors that it can be used in various liquid crystal display elements of, for example, active matrix drive type using TFT.
摘要:
Liquid crystal compositions are provided which have a particularly excellent miscibility at low temperatures, properly large .DELTA.n, and small Vth and viscosity while satisfying several characteristics required of liquid crystal composition for AM-LCD. Disclosed are liquid crystal compositions containing, as a first component, at least one compound expressed by general formula either (I-1) or (I-2), and containing, as a second component, at least one compound expressed by any one of general formulas (II-1) to (II-7) ##STR1## wherein n is an integer of 1 to 10, Z.sup.1 represents --CH.sub.2 CH.sub.2 -- or single bond, X represents F or OCF.sub.3, Y represents H or F, and m is 0 or 1. The liquid crystal compositions of the present invention are useful as liquid crystal material for low voltage in several modes such as active matrix mode and STN mode.
摘要:
In order to provide novel compounds which are useful as liquid crystal materials for low voltages in several liquid crystal displays, have a large dielectric anisotropy, and are low in viscosity; and to improve characteristics of liquid crystal compositions, difluorooxymethane derivatives expressed by the following general formula (I) and liquid crystal compositions containing the compound are proposed ##STR1## wherein each of l, m, and n is 0 or 1, rings A.sub.1 to A.sub.3 independently represent six-membered rings such as trans-1,4-cyclohexylene and 1,4-phenylene, Z.sub.1 to Z.sub.3 independently represent a bonding group such as covalent bond and --CH.sub.2 CH.sub.2 --, L.sub.1 to L.sub.4 independently represent hydrogen atom or halogen atom, and X represents a group such as halogen atom and OCF3.They are useful as liquid crystal materials for low voltages in several modes such as active matrix mode and STN mode.
摘要:
Liquid crystal compositions are provided which have particularly a low threshold voltage, excellent miscibility at low temperatures, and a wide nematic phase range while satisfying several characteristics required of liquid crystal compositions for AM-LCD. The liquid crystal compositions contain, as a first component, at least one compound expressed by either formula (I-1) or (I-2), and as a second component, at least one compound expressed by any one of formulas (II-1) to (II-7) ##STR1## wherein n is an integer of 1 to 10, Z.sub.1 represents --CH.sub.2 CH.sub.2 -- or a single bond, X represents F, OCF.sub.3 or CF.sub.3, and Y represents H or F.
摘要:
A novel liquid crystalline compound having a high elastic constant ratio (K.sub.33 /K.sub.11) and an improved solubility thereof in other liquid crystal materials, at low temperatures, and a liquid crystal composition containing the same are provided. The liquid crystalline compound is expressed by the formula (1): ##STR1## wherein Q represents CF.sub.3, CF.sub.2 H or CFH.sub.2 ; A.sub.1, A.sub.2 and A.sub.3 each independently represent trans-1,4-cyclohexylene group, 1,4-phenylene group, wherein one or more hydrogen atoms on its six-membered ring may be replaced by F, Cl or CN, pyridine-2,5-diyl group or 1,3-pyrimidine-2,5-diyl; ring B represents 1,4-phenylene group or trans-1,4-cyclohexylene group; Z.sub.1, Z.sub.2 and Z.sub.3 each independently represent covalent bond, --C.dbd.C--, --C.tbd.C--, --OCO--, --COO--, --CH.sub.2 O--, --OCH.sub.2 --, --(CH.sub.2).sub.2 -- or --(CH.sub.2).sub.4 --; l and m each independently represent an integer of 0 to 5; o and p each independently represent 0 or 1; L.sub.1 and L.sub.2 each independently represent H, F or Cl; L.sub.3 represents halogen atom, CN, CF.sub.3, CF.sub.2 H, CFH.sub.2, OCF.sub.3, OCF.sub.2 H, H or an alkyl group of 1 to 10 carbon atoms or an alkenyl group of 2 to 10 carbon atoms wherein optional methylene groups (--CH.sub.2 --) in the alkyl group or the alkenyl group each independently may be replaced by --O--, --S--, --CO--, --OCO-- or --COO--, but two or more methylene groups should not be continuedly replaced.
摘要翻译:提供了一种在低温下具有高弹性常数比(K33 / K11)和改善其在其它液晶材料中的溶解度的新型液晶化合物和含有该液晶组合物的液晶组合物。 液晶化合物由式(1)表示:其中Q表示CF 3,CF 2 H或CFH 2; A1,A2和A3各自独立地表示反式-1,4-亚环己基,1,4-亚苯基,其六元环上的一个或多个氢原子可被F,Cl或CN取代,吡啶-2, 5-二基或1,3-嘧啶-2,5-二基; 环B表示1,4-亚苯基或反式-1,4-亚环己基; Z 1,Z 2和Z 3各自独立地表示共价键,-C = C - , - C 3BOND C - , - OO - , - COO - , - CH 2 O - , - OCH 2 - , - (CH 2)2 - 或 - (CH 2) 4-; l和m各自独立地表示0〜5的整数, o和p各自独立地表示0或1; L1和L2各自独立地表示H,F或Cl; L 3表示卤素原子,CN,CF 3,CF 2 H,CFH 2,OCF 3,OCF 2 H,H或1-10个碳原子的烷基或2-10个碳原子的链烯基,其中烷基中任选的亚甲基(-CH 2 - ) 基团或烯基各自独立地可以被-O - , - S - , - CO-,-OCO-或-COO-取代,但是不应该连续更换两个或多个亚甲基。
摘要:
A novel liquid crystalline compound having a high elastic constant ratio (K.sub.33 /K.sub.11) and an improved solubility thereof in other liquid crystal materials, at low temperatures, and a liquid crystal composition containing the same are provided. The liquid crystalline compound is expressed by the formula (1): ##STR1## wherein Q represents CF.sub.3, CF.sub.2 H or CFH.sub.2 ; A.sub.1, A.sub.2 and A.sub.3 each independently represent trans-1,4-cyclohexylene group, 1,4-phenylene group, wherein one or more hydrogen atoms on its six-membered ring may be replaced by F, Cl or CN, pyridine-2,5-diyl group or 1,3-pyrimidine-2,5-diyl; ring B represents 1,4-phenylene group or trans-1,4-cyclohexylene group; Z.sub.1, Z.sub.2 and Z.sub.3 each independently represent covalent bond, --C.dbd.C--, --C.tbd.C--, --OCO--, --COO--, --CH.sub.2 O--, --OCH.sub.2 --, --(CH.sub.2).sub.2 -- or --(CH.sub.2).sub.4 --; l and m each independently represent an integer of 0 to 5; o and p each independently represent 0 or 1; L.sub.1 and L.sub.2 each independently represent H, F or Cl; L.sub.3 represents halogen atom, CN, CF.sub.3, CF.sub.2 H, CFH.sub.2, OCF.sub.3, OCF.sub.2 H, H or an alkyl group of 1 to 10 carbon atoms or an alkenyl group of 2 to 10 carbon atoms wherein optional methylene groups (--CH.sub.2 --) in the alkyl group or the alkenyl group each independently may be replaced by --O--, --S--, --CO--, --OCO-- or --COO--, but two or more methylene groups should not be continuedly replaced.
摘要翻译:提供了一种在低温下具有高弹性常数比(K33 / K11)和改善其在其它液晶材料中的溶解度的新型液晶化合物和含有该液晶组合物的液晶组合物。 液晶化合物由式(1)表示:其中Q表示CF 3,CF 2 H或CFH 2; A1,A2和A3各自独立地表示反式-1,4-亚环己基,1,4-亚苯基,其六元环上的一个或多个氢原子可被F,Cl或CN取代,吡啶-2, 5-二基或1,3-嘧啶-2,5-二基; 环B表示1,4-亚苯基或反式-1,4-亚环己基; Z 1,Z 2和Z 3各自独立地表示共价键,-C = C - , - C 3BOND C - , - OO - , - COO - , - CH 2 O - , - OCH 2 - , - (CH 2)2 - 或 - (CH 2) 4-; l和m各自独立地表示0〜5的整数, o和p各自独立地表示0或1; L1和L2各自独立地表示H,F或Cl; L 3表示卤素原子,CN,CF 3,CF 2 H,CFH 2,OCF 3,OCF 2 H,H或1-10个碳原子的烷基或2-10个碳原子的链烯基,其中烷基中任选的亚甲基(-CH 2 - ) 基团或烯基各自独立地可以被-O - , - S - , - CO-,-OCO-或-COO-取代,但是不应该连续更换两个或多个亚甲基。
摘要:
A liquid crystalline compound expressed by the general formula (1) ##STR1## (wherein R.sub.1 is an alkyl group having 1 to 12 carbon atoms and one CH.sub.2 group in the alkyl group may be replaced by oxygen atom or --CH.dbd.CH--; X represents hydrogen atom or fluorine atom; Y represents hydrogen atom or alkoxy group having 1 to 5 carbon atoms; l and m independently represent 0 or 1, respectively; and n and p independently represent an integer of 0 to 10, respectively, and when p is 0, n is 1 or more, and when Y is an alkoxy group, X is a fluorine atom and p is 0.) Liquid crystal compositions which are suitable for use in liquid crystal display devices, have a high clearing point, and have a function of decreasing viscosity, and novel liquid crystalline compounds useful as a component of the liquid crystal compositions are provided.