公开(公告)号：US06248260B1

公开(公告)日：2001-06-19

申请号：US09355285

申请日：1999-07-28

申请人： Yasuhiro Haseba ,  Kazutoshi Miyazawa ,  Shuichi Matsui ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Yasuhiro Haseba ,  Kazutoshi Miyazawa ,  Shuichi Matsui ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： C09K1912

CPC分类号： C07C25/18 ,  C07C22/08 ,  C07C43/225 ,  C07C2601/14 ,  C07F7/0896 ,  C09K19/0403 ,  C09K19/3001 ,  C09K19/406 ,  C09K2019/0407 ,  C09K2019/0444

摘要： Provided are liquid crystalline compounds which are excellent in the miscibility with existing liquid crystalline compounds even at low temperatures and are electrically and chemically stable while having a high voltage holding ratio and a high &Dgr;∈; liquid crystal compositions comprising the compound; and liquid crystal display devices fabricated by using the composition; the liquid crystalline compounds are expressed by the general formula (1)

摘要翻译： 提供即使在低温下与现有液晶化合物的混溶性也优异且在具有高电压保持率和高DELTAε的情况下具有电学和化学稳定性的液晶化合物; 包含该化合物的液晶组合物; 和使用该组合物制造的液晶显示装置; 液晶化合物由通式（1）表示，

公开(公告)号：US06326065B1

公开(公告)日：2001-12-04

申请号：US09203671

申请日：1998-12-01

申请人： Yasuhiro Haseba ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yoshitaka Tomi ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Yasuhiro Haseba ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yoshitaka Tomi ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： C09K1930

摘要： Liquid crystalline compounds having a comparatively high voltage holding ratio, high &Dgr;n and high &Dgr;&egr;, and excellent miscibility with known liquid crystalline compounds at low temperatures. The novel compounds have the formula (1) wherein R represents hydrogen atom or an alkyl group having 1 to 20 carbon atoms; n1 and n2 are independently 0, 1, or 2 provided that the sum of n1 and n2 is 1 or 2; ring A and ring B independently represent 1,4-phenylene, fluorine substituted 1,4-phenylene expressed by the formula (a) in the specification or 1,4-cyclohexylene provided that at least one of ring A and ring B is fluorine substituted 1,4-phenylene expressed by the formula (a); Za, Zb, and Zc independently represent single bond, —CH2CH2—, —COO—, —CF2O—, or —CH2CH2CH2CH2—; Q1, Q2, Q3, Q4, Q5, Q6, and Q7 independently represent hydrogen atom, a halogen atom, or methyl group provided that when at least one of Za, Zb, and Zc is —CH2CH2—, then Q2 is fluorine atom, and that when Za, Zb, and Zc are all single bonds, then Q1, Q2, Q3, Q4, Q5, Q6, and Q7 independently represent hydrogen atom or fluorine atom; Y represents hydrogen atom, a halogen atom, or a halogenated alkyl group having 1 to 5 carbon atoms; and each atom constituting this compound may be replaced by its isotope.

摘要翻译： 具有比较高的电压保持率，高DELTAn和高DELTAepsi的液晶化合物，以及在低温下与已知液晶化合物的优异的混溶性。 新化合物具有式（1）其中R表示氢原子或具有1至20个碳原子的烷基; n1和n2独立地为0,1或2，条件是n1和n2的和为1或2; 环A和环B独立地表示说明书中所示的1,4-亚苯基，由式（a）表示的氟取代的1,4-亚苯基或1,4-亚环己基，条件是环A和环B中的至少一个为氟取代的 由式（a）表示的1,4-亚苯基; Za，Zb和Zc独立地表示单键，-CH2CH2-，-COO-，-CF2O-或-CH2CH2CH2CH2-; Q1，Q2，Q3，Q4，Q5，Q6和Q7独立地表示氢原子，卤素原子或甲基，条件是当Za，Zb和Zc中的至少一个是-CH 2 CH 2 - 时，则Q2是氟原子， 当Za，Zb和Zc都是单键时，Q1，Q2，Q3，Q4，Q5，Q6和Q7独立地表示氢原子或氟原子; Y表示氢原子，卤素原子或碳原子数1〜5的卤代烷基; 并且构成该化合物的每个原子可以被其同位素代替。

公开(公告)号：US06235355B1

公开(公告)日：2001-05-22

申请号：US09101999

申请日：1998-07-21

申请人： Yasuhiro Haseba ,  Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasusuke Hisatsune ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Yasuhiro Haseba ,  Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasusuke Hisatsune ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： C09K1934

CPC分类号： C09K19/3402 ,  C07D319/06 ,  C09K19/40 ,  C09K19/406 ,  C09K2019/3422 ,  Y10T428/10

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.

摘要翻译： 本发明提供具有高电压保持率和非常高的DELTAepsi值，电化学稳定性和与已知液晶化合物的良好相容性，含有该化合物的液晶组合物和使用该液晶化合物的液晶显示装置 化合物。本发明的液晶化合物是由通式（1）表示的特定二恶烷衍生物。 此外，本发明涉及液晶组合物，其特征在于，所述组合物包含至少一种衍生物，以及使用该组合物构成的液晶显示装置。

公开(公告)号：US5858272A

公开(公告)日：1999-01-12

申请号：US893237

申请日：1997-07-15

申请人： Yasuhiro Haseba ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasusuke Hisatsune ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Yasuhiro Haseba ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasusuke Hisatsune ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： G02F1/13 ,  C07D319/06 ,  C09K19/34 ,  C09K19/42 ,  C09K19/44 ,  C09K19/46

CPC分类号： C07D319/06 ,  C09K19/3402 ,  C09K19/42 ,  C09K19/44 ,  C09K19/46 ,  C09K2019/0448 ,  C09K2019/0451 ,  C09K2019/3422

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。

公开(公告)号：US06596349B2

公开(公告)日：2003-07-22

申请号：US09836315

申请日：2001-04-18

申请人： Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： C09K1912

CPC分类号： C07C25/18 ,  C07C43/225 ,  C09K19/12 ,  Y10T428/10

摘要： The present invention provides liquid crystalline compounds having a high voltage holding ratio and a low threshold voltage, little variation of these properties with temperature change, high &Dgr;n, and good compatibility with other liquid crystal materials particularly under a low temperature; liquid crystal compositions containing these crystalline compounds; and liquid crystal display devices made using these liquid crystal compositions. The liquid crystalline compounds are terphenyl derivatives represented by general formula (1): wherein R represents a straight or branched alkyl group of 1-20 carbon atoms, and any methylene groups (—CH2—) not adjacent each other in each alkyl group may be replaced by oxygen atoms; X is a halogen atom, —OCF3, —OCF2H, —CF3, —CF2H or —CFH2; Y1, Y2, Y3, Y4, Y5 and Y6 independently represents H or F, but at least two of Y1, Y2, Y3 and Y4 represent F; and any atom constituting these compounds may be substituted by its isotope.

摘要翻译： 本发明提供具有高电压保持率和低阈值电压的液晶化合物，这些性质与温度变化的变化小，DELTAn高，与其他液晶材料的相容性特别好，在低温下; 含有这些结晶化合物的液晶组合物; 以及使用这些液晶组合物制成的液晶显示装置。 液晶化合物是由通式（1）表示的三联苯衍生物：其中R表示1-20个碳原子的直链或支链烷基，每个烷基中不相邻的任何亚甲基（-CH 2 - ）可以是 被氧原子取代; X是卤素原子，-OCF 3，-OCF 2 H，-CF 3，-CF 2 H或-CFH 2; Y1，Y2，Y3，Y4，Y5和Y6独立地表示H或F，但Y1，Y2，Y3和Y4中的至少两个表示F; 并且构成这些化合物的任何原子可以被其同位素取代。

公开(公告)号：US06344247B1

公开(公告)日：2002-02-05

申请号：US09269287

申请日：1999-03-25

申请人： Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： C09K1912

CPC分类号： C07C25/18 ,  C07C43/225 ,  C09K19/12 ,  Y10T428/10

摘要： The present invention provides liquid crystalline compounds having a high voltage holding ratio and a low threshold voltage, little variation of these properties depending on temperature change, high &Dgr;n, and good compatibility with other liquid crystal materials particularly under a low temperature; liquid crystal compositions containing these crystalline compounds; and liquid crystal display devices comprising these liquid crystal compositions. The liquid crystalline compounds are terphenyl derivatives represented by general formula (1): wherein R represents a straight or branched alkyl group of 1-20 carbon atoms, and any methylene groups (—CH2—) not adjacent each other in each alkyl group may be replaced by oxygen atoms; X represents halogen atom, —OCF3, —OCF2H, —CF3, —CF2H or —CFH2; Y1, Y2, Y3, Y4, Y5 and Y6 independently represents H or F, but at least two of Y1, Y2, Y3 and Y4 represent F; and any atom constituting these compounds may be substituted by its isotope.

摘要翻译： 本发明提供了具有高电压保持率和低阈值电压的液晶化合物，这些特性根据温度变化几乎没有变化，高DELTAn，以及与其它液晶材料，特别是在低温下的良好相容性; 含有这些结晶化合物的液晶组合物; 以及包含这些液晶组合物的液晶显示装置。 液晶化合物是由通式（1）表示的三联苯衍生物：其中R表示1-20个碳原子的直链或支链烷基，每个烷基中不相邻的任何亚甲基（-CH 2 - ）可以是 被氧原子取代; X表示卤素原子，-OCF 3，-OCF 2 H，-CF 3，-CF 2 H或-CFH 2; Y1，Y2，Y3，Y4，Y5和Y6独立地表示H或F，但Y1，Y2，Y3和Y4中的至少两个表示F; 并且构成这些化合物的任何原子可以被其同位素取代。

公开(公告)号：US06254941B1

公开(公告)日：2001-07-03

申请号：US09269286

申请日：1999-03-25

申请人： Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： C09K1912

CPC分类号： C07C17/12 ,  C07C17/263 ,  C07C17/2635 ,  C07C17/361 ,  C07C25/18 ,  C07C43/174 ,  C07C43/225 ,  C09K19/12 ,  C09K19/14 ,  C09K19/20 ,  C09K2019/124 ,  Y10T428/10 ,  C07C25/13

摘要： The present invention provides liquid crystalline compounds having a very high voltage holding ratio, very little variation of these properties depending on temperature, high &Dgr;n, and good compatibility in the other liquid crystal materials particularly under a low temperature, liquid crystal compositions containing these crystalline compounds, and liquid crystal display devices constituted by using the liquid crystal compositions. The liquid crystalline compounds are represented by general formula (1): wherein R represents an alkyl, alkoxy or alkoxyalkyl group of 2-20 carbon atoms, and in each group, any 1-3 hydrogen atoms may be replaced by fluorine atoms; X shows an halogen atom or an alkyl group of 1-20 carbon atoms, any methylene groups (—CH2—) not adjacent each other in the alkyl group may be replaced by oxygen atoms, and any one or more hydrogen atoms in the alkyl group may be replaced by fluorine atoms; Z1, Z2 and Z3, each independently, represents —(CH2)2—, —(CH2)4—, —CH2O—, —OCH2—, —(CH2)3O—, —O(CH2)3— or a covalent bond; Y1-Y16 each independently represent hydrogen atoms or fluorine atoms, but at least two represent fluorine atoms; m represents 0 or 1, and any atom constituting the compound may be replaced by an isotope thereof.

摘要翻译： 本发明提供了具有非常高的电压保持率的液晶化合物，这些性质随温度变化很小，DELTAn高，在其它液晶材料中特别是在低温下具有良好的相容性，含有这些结晶化合物的液晶组合物 ，以及使用液晶组合物构成的液晶显示装置。 液晶化合物由通式（1）表示：其中R表示2-20个碳原子的烷基，烷氧基或烷氧基烷基，并且在每一组中，任何1-3个氢原子可被氟原子取代; X表示卤素原子或1-20个碳原子的烷基，烷基中不相邻的任何亚甲基（-CH 2 - ）可以被氧原子取代，并且烷基中的任何一个或多个氢原子 可以被氟原子取代; Z 2，Z 2和Z 3各自独立地表示 - （CH 2）2 - ， - （CH 2）4 - ， - CH 2 O - ， - OCH 2 - ， - （CH 2）3 O-，-O ; Y1-Y16各自独立地表示氢原子或氟原子，但至少两个表示氟原子; m表示0或1，构成化合物的任何原子可以被其同位素代替。

公开(公告)号：US6149838A

公开(公告)日：2000-11-21

申请号：US319025

申请日：1999-05-28

申请人： Atsuko Fujita ,  Norio Tamura ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Atsuko Fujita ,  Norio Tamura ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： C07C255/31 ,  C07C255/34 ,  C07C255/35 ,  C07C255/37 ,  C07C255/38 ,  C07D239/26 ,  C07D319/06 ,  C09K19/04 ,  C09K19/30 ,  C09K19/42 ,  C09K19/44 ,  C09K19/46 ,  C09K19/34 ,  C09K19/12

CPC分类号： C07D239/26 ,  C07C255/31 ,  C07C255/34 ,  C07C255/35 ,  C07C255/37 ,  C07C255/38 ,  C07D319/06 ,  C09K19/04 ,  C09K19/3001 ,  C09K19/3003 ,  C09K19/3028 ,  C09K19/3048 ,  C09K19/3059 ,  C09K19/42 ,  C09K19/44 ,  C09K19/46 ,  C07C2101/08 ,  C07C2101/14 ,  C09K2019/0448 ,  C09K2019/0451 ,  C09K2019/0496

摘要： Liquid crystalline compounds having a wide temperature range of liquid crystal phase, a high dielectric anisotropy, and a high optical anisotropy; and liquid crystal compositions and display devices containing the composition. The liquid crystalline compounds are conjugated nitrile derivatives expressed by the formula (1) ##STR1## wherein R represents an alkyl group or a fluoroalkyl group each having 1 to 10 carbon atoms, halogen atom, or cyano group provided that in the alkyl or fluoroalkyl group, one or not-adjacent two or more methylene or fluoromethylene groups may be replaced by oxygen atom or 1,2-ethenylene group; A.sub.1, A.sub.2, A.sub.3 and A.sub.4 represent 1,4-cyclohexylene group, 1,4-phenylene in which one or two hydrogen atoms on the ring may be replaced by fluorine atom, 1,3-dioxane-2,5-diyl, or pyrimidine-2,5-diyl; B.sub.1, B.sub.2, and B.sub.3 independently represent a covalent bond, 1,2-ethylene group, 1,2-ethenylene group, 1,2-ethynylene group, carbonyloxy group, methylenoxy group, or 1,4-butylene group; m, n, and p are 0 or 1; and G represents a group expressed by the formula ##STR2##

摘要翻译： PCT No.PCT / JP97 / 04328 Sec。 371日期1999年5月28日 102（e）1999年5月28日PCT 1997年11月27日PCT PCT。 公开号WO98 / 23583 日期1998年6月4日液晶相温度范围宽，介电各向异性高，光学各向异性高的液晶化合物; 以及含有该组合物的液晶组合物和显示装置。 液晶化合物是由式（1）表示的共轭腈衍生物，其中R表示烷基或具有1-10个碳原子的氟代烷基，卤素原子或氰基，条件是在烷基或氟代烷基中的一个或 不相邻的两个或更多个亚甲基或氟代亚甲基可以被氧原子或1,2-亚乙烯基取代; A1，A2，A3和A4表示1,4-亚环己基，其中一个或两个氢原子可被氟原子取代的1,4-亚苯基，1,3-二恶烷-2,5-二基或 嘧啶-2,5-二基; B1，B2和B3独立地表示共价键，1,2-亚乙基，1,2-亚乙烯基，1,2-亚乙炔基，羰氧基，亚甲氧基或1,4-亚丁基; m，n和p为0或1; G表示由式表示的基团

公开(公告)号：US06579577B2

公开(公告)日：2003-06-17

申请号：US09917271

申请日：2001-07-30

申请人： Tomoyuki Kondo ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Tomoyuki Kondo ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： C09K1912

CPC分类号： C07C17/12 ,  C07C17/263 ,  C07C17/35 ,  C07C25/18 ,  C07C43/225 ,  C09K19/14 ,  C09K19/20 ,  C09K19/42 ,  C09K19/44 ,  C09K19/46 ,  C09K2019/0448 ,  C09K2019/0451 ,  Y10T428/10

摘要： There is provided a liquid crystalline compound having a high voltage holding ratio which has a very small degree of temperature dependence, a low threshold voltage which has a very small degree of temperature dependence, a high &Dgr;n, and excellent miscibility with other liquid crystal materials at low temperature; a liquid crystal composition; and a liquid crystal display element, and the liquid crystalline compound is a substituted benzene derivative represented by general formula (1), where, R represents a straight chain or branched alkyl group having 1 to 20 carbon atoms in which each of optional and nonadjacent methylene groups (—CH2—) may be substituted by an oxygen atom; X represents a halogen atom, —CF3, —CF2H, —CFH2, —OCF3 or —OCF2H; each of Z1 and Z2 independently represents —(CH2)2—, —(CH2)4—, —CH2O—, —OCH2— or a covalent bond, but Z1 and Z2 are not covalent bonds simultaneously; each of Y1, Y2, Y3, Y4, Y5, and Y6 independently represents H or F, but at least one of Y1, Y2, Y3, and Y4 represents F.

摘要翻译： 提供了具有非常小的温度依赖性的高电压保持率的液晶化合物，具有非常小的温度依赖性的低阈值电压，高DELTAn和与其它液晶材料的优异的混溶性 低温; 液晶组合物; 和液晶显示元件，液晶化合物是通式（1）表示的取代苯衍生物，其中，R表示碳原子数1〜20的直链或支链烷基，其中任选的和不相邻的亚甲基 基团（-CH 2 - ）可以被氧原子取代; X表示卤素原子，-CF 3，-CF 2 H，-CFH 2，-OCF 3或-OCF 2 H; Z 1和Z 2各自独立地表示 - （CH 2）2 - ， - （CH 2）4 - ， - CH 2 O-，-OCH 2 - 或共价键，但Z 1和Z 2不同时为共价键; Y1，Y2，Y3，Y4，Y5和Y6各自独立地表示H或F，但Y1，Y2，Y3和Y4中的至少一个表示F.

公开(公告)号：US06555185B2

公开(公告)日：2003-04-29

申请号：US09836317

申请日：2001-04-18

申请人： Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

发明人： Tomoyuki Kondou ,  Shuichi Matsui ,  Kazutoshi Miyazawa ,  Hiroyuki Takeuchi ,  Yasuhiro Kubo ,  Fusayuki Takeshita ,  Etsuo Nakagawa

IPC分类号： C09K1912

CPC分类号： C07C25/18 ,  C07C43/225 ,  C09K19/12 ,  Y10T428/10

摘要： The present invention provides liquid crystalline compounds having a high voltage holding ratio and a low threshold voltage, little variation of these properties with temperature change, high &Dgr;n, and good compatibility with other liquid crystal materials particularly under a low temperature; liquid crystal compositions containing these crystalline compounds; and liquid crystal display devices made using these liquid crystal compositions. The liquid crystalline compounds are terphenyl derivatives represented by general formula (1): wherein R represents a straight or branched alkyl group of 1-20 carbon atoms, and any methylene groups (—CH2—) not adjacent each other in each alkyl group may be replaced by oxygen atoms; X is a halogen atom, —OCF3, —OCF2H, —CF3, —CF2H or —CFH2; Y1, Y2, Y3, Y4, Y5 and Y6 independently represents H or F, but at least two of Y1, Y2, Y3 and Y4 represent F; and any atom constituting these compounds may be substituted by its isotope.