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    • 11. 发明授权
    • Ferroelectric liquid crystal composition
    • 铁电液晶组成
    • US5427714A
    • 1995-06-27
    • US096848
    • 1993-07-26
    • Katsuyuki MurashiroMakoto KikuchiKanetsugu Terashima
    • Katsuyuki MurashiroMakoto KikuchiKanetsugu Terashima
    • G02F1/13C07D239/26C09K19/34C09K19/42C09K19/44C09K19/46
    • C07D239/26C09K19/3463
    • A ferroelectric liquid crystal composition having a SC* phase and a light-switching element using the composition are provided, which composition comprises the following components, A, B and C, each in a specified proportion: Component A has the formula ##STR1## wherein ##STR2## R.sup.1 and R.sup.2 are same or different linear or branched alkyl, alkoxy or alkanoyloxy of 1-18C, X is H, halogen or CN, l, m and n are 0 or 1 and (l+m+n) is 1 or 2, and has smectic C phase;Component B has the formula ##STR3## wherein ##STR4## Y is H, halogen or CN, k is 0 or 1, R.sup.3 is linear or branched alkyl or alkoxy of 1-18C, and * is asymmetric C, and consists of optically active compounds having the same senses of Ps in SC* phase induced when dissolved in smectic C liquid crystal, to one another; andComponent C has the formula ##STR5## wherein ##STR6## Z is H, halogen or CN, R.sup.5 and R.sup.6 are same or different linear or branched alkyl or alkoxy of 1-18C R.sup.4 is 12-18C alkyl or 1-18C linear or branched alkoxy, and * is asymmetric C, and is an optically active compound having the same sense of Ps in SC* phase induced when dissolved in smectic C liquid crystal as that of the compound of component B.
    • 提供具有SC *相的铁电液晶组合物和使用该组合物的光开关元件,该组成包含以下组分,A,B和C各自为特定比例:组分A具有式“IMAGE”( A)其中R1和R2是1-18C的相同或不同的直链或支链烷基,烷氧基或烷酰氧基,X是H,卤素或CN,l,m和n是0或1,并且(1+ m + n)为1或2,具有近晶C相; 组分B具有式(B)其中或CN,k为0或1,R3为1-18C的直链或支链烷基或烷氧基,*为不对称C,并由具有 在溶解在近晶C液晶中时,在SC *相中诱导的Ps的相同感觉; 并且组分C具有其中 的公式(C)
    • 12. 发明授权
    • Ferroelectric liquid crystal composition
    • 铁电液晶组成
    • US5240638A
    • 1993-08-31
    • US908854
    • 1992-07-01
    • Makoto KikuchiKanetsugu TerashimaKatsuyuki Murashiro
    • Makoto KikuchiKanetsugu TerashimaKatsuyuki Murashiro
    • C09K19/02C09K19/34C09K19/46
    • C09K19/46C09K19/0225C09K19/3441
    • A ferroelectric liquid crystal composition comprising smectic liquid crystal composition(s) and optically active compounds and having a spontaneous polarization value of 20 nC cm.sup.-2 or less and nevertheless having high rate response properties, and a light-switching element are provided, which composition comprises the following components (A), (B), (C) and (D), in 76-95, 2-10, 1-6 and 2-8 wt.%, respectively, based on the total quantity of the 4 components:(A): at least one compound of the formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different, being 1-18C alkyl, or the formula ##STR2## wherein R.sup.3 and R.sup.4 are the same or different, being 1-18C alkyl or alkoxy and having smectic C phase:(B): an optically active compound of the formula ##STR3## wherein R.sup.5 is 1-18C alkyl or alkoxy, X is ##STR4## Y is halogen or H and * is asymmetric C atom; (C): at least one optically active compound of the formulas ##STR5## wherein R.sup.6 and R.sup.8 are 1-18C alkyl or alkoxy, R.sup.7 and R.sup.9 are 2-18C alkyl or alkoxy and * is an asymmetric C atom; and(D): at least on optically active compound formula ##STR6## wherein R.sup.10 is 1-18 C alkyl or alkoxy, Z is H or halogen and * is an asymmetric C atom.
    • 提供了包含近晶型液晶组合物和光学活性化合物并且具有20nC cm -2以下的自发极化值并且具有高速率响应特性的铁电液晶组合物和光开关元件,该组成 包括以下组分(A),(B),(C)和(D),分别为76-95,2-10,1-6和2-8重量%,基于4 组分:(A):至少一种式(I)的化合物,其中R 1和R 2相同或不同,为1-18C烷基或式(II),其中R 3和R 4为 相同或不同的是1-18C烷基或烷氧基并具有近晶C相:(B):下式的光学活性化合物其中R5是1-18C烷基或烷氧基,X是Y 是卤素或H,*是不对称C原子; (IV)2a或图像(IV)中的至少一种光学活性化合物(IV-1a)图像(IV-1b) (IV-2b)其中R6和R8为1-18C烷基或烷氧基,R7和R9为2-18C烷基或烷氧基,*为不对称C原子; 和(D):至少在光学活性化合物式“IMAGE”,1CHC2H5 + RE(V)其中R10为1-18C烷基或烷氧基,Z为H或卤素,*为不对称C原子。
    • 18. 发明授权
    • Liquid crystal compositions and liquid crystal display devices
    • 液晶组合物和液晶显示装置
    • US06759102B2
    • 2004-07-06
    • US10132854
    • 2002-04-26
    • Katsuyuki MurashiroYasuhiro Kubo
    • Katsuyuki MurashiroYasuhiro Kubo
    • C09K1930
    • C09K19/46C09K19/42C09K19/44Y10T428/10Y10T428/1036
    • Liquid crystal compositions which comprise as a first component at least one compound selected from the group of compounds represented by the formula (I) and as a second component at least one compound selected from the group of compounds represented by the formula (II), the content of the first component being not less than 30% by weight based on the total weight of the composition wherein R1 and R3 are independently an alkyl of 1 to 10 carbon atoms and any —CH2— in the alkyl may be replaced by —O— or —CH═CH—; R2 is an alkyl of 1 to 10 carbon atoms, —F or —Cl; X1, X2, X3, X4, X5, X6, X7, X8 and X10 are independently —F or —H; X9 is —F, —Cl, —CF3, —OCF3 or —OCF2H; A1 and A2 are independently 1,4-cyclohexylene, pyrimidine-2,5-diyl or 1,4-phenylene in which any —H may be replaced by —F; Z1 and Z3 are independently a single bond, —(CH2)2— or —(CH2)4—; Z2 is a single bond or —CF2O—; and Z4 is a single bond, —COO— or —CF2O—. These compositions have reduced response time and low threshold voltage, and are used in a liquid crystal display device, especially that of an OCB mode.
    • 作为第一成分含有选自式(I)所示化合物的化合物和作为第二成分的至少一种选自式(II)所示的化合物的化合物的化合物的第一成分的液晶组合物, 基于组合物的总重量,第一组分的含量不小于30重量%,其中R 1和R 3独立地是1至10个碳原子的烷基,并且烷基中的任何-CH 2 - 可以是 被-O - 或-CH = CH-取代; R 2是1-10个碳原子的烷基,-F或-Cl; X 1,X 2,X 3,X 4,X 5,X 6,X 7,X 8和X 10独立地为-F或 - H; X 9是-F,-Cl,-CF 3,-OCF 3或-OCF 2 H; A 1和A 2独立地是1,4-亚环己基,嘧啶-2,5-二基或1,4-亚苯基,其中任何-H可被-F代替; Z 1和Z 3独立地是单键, - (CH 2)2 - 或 - (CH 2)4 - ; Z 2是单键或-CF 2 O-; 且Z 4为单键-COO-或-CF 2 O-。 这些组合物具有降低的响应时间和低阈值电压,并且用于液晶显示装置,特别是OCB模式的液晶显示装置中。
    • 20. 发明授权
    • Antiferroelectric liquid crystal composition
    • 反铁电液晶组合物
    • US5378392A
    • 1995-01-03
    • US917346
    • 1992-07-23
    • Katsuyuki MurashiroKikuchi MakotoTerashima Kanetsugu
    • Katsuyuki MurashiroKikuchi MakotoTerashima Kanetsugu
    • C09K19/02C09K19/20C09K19/46G02F1/13C09K19/52C09K19/12
    • C09K19/0266C09K19/2021C09K19/46
    • An antiferroelectric mixture comprising first and second components is provided, the mixing proportions of the first and second components being 60-97 wt. % and 3-40 wt. % based upon the total weight of the two components, respectively, the first component being selected from the group consisting of compounds expressed by the formula (I) and the second component being selected from the group consisting of compounds expressed by the formula (II): ##STR1## wherein R.sup.1 and R.sup.3 are C.sub.1-18 alkyl or alkoxy, R.sup.2 and R.sup.4 are C.sub.2-18 alkyl or alkoxy, X and Y are --CH.sub.3, --CF.sub.3 or --C.sub.2 F.sub.5, rings A, B, C, D and E are 1,4-cyclohexylene, 1,4-phenylene an H atom of which may be replaced by a halogen atom or a cyano group, pyridine-2,5-diyl, pyrimidine-2,5-diyl, pyrazine-2,5-diyl or pyridazine-3,6-diyl, Z is --COO--, --CH.sub.2 O-- or --OCH.sub.2 --, m and n each are 1 or 2, (m+n) is 3, and Z is 0 or 1.Using the above antiferroelectric liquid crystal composition, a light-switching element having improved the temperature-dependency of threshold electric field and capable of effecting a tristable switching at a high is obtained.
    • 提供了包含第一和第二组分的反铁电混合物,第一和第二组分的混合比例为60-97wt。 %和3-40wt。 分别基于两种组分的总重量,第一组分选自由式(I)表示的化合物和第二组分选自由式(II)表示的化合物组成的组, :C1-18烷基或烷氧基,R2和R4是C2-18烷基或烷氧基,X和Y是-CH3,-CF3或-C2F5,A,B,C,D和E环是1,4-亚环己基, 吡啶-2,5-二基,嘧啶-2,5-二基,吡嗪-2,5-二基或哒嗪-3的1,4-亚苯基,其中H原子可以被卤素原子或氰基取代, Z为-COO - , - CH 2 O-或-OCH 2 - ,m和n各自为1或2,(m + n)为3,Z为0或1.使用上述反铁电液晶组合物, 获得了提高阈值电场的温度依赖性且能够实现高的三态切换的光开关元件。