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    • 3. 发明授权
    • Liquid crystal composition and liquid crystal display device
    • 液晶组成和液晶显示装置
    • US5837161A
    • 1998-11-17
    • US822688
    • 1997-03-24
    • Yasuko SekiguchiKatsuyuki MurashiroFusayuki TakeshitaTetsuya MatsushitaEtsuo Nakagawa
    • Yasuko SekiguchiKatsuyuki MurashiroFusayuki TakeshitaTetsuya MatsushitaEtsuo Nakagawa
    • G02F1/13C09K19/30C09K19/34C09K19/42C09K19/44C09K19/46C09K19/12
    • C09K19/42C09K19/44C09K19/46C09K2019/0448C09K2019/0451Y10T428/1005
    • Liquid crystal compositions having a small value of .gamma. (V.sub.10 /V.sub.90) and a small .tau. (fast response speed) in order to cope especially with high speed response, while satisfying various characteristics required of STN display mode. These compositions comprise at least one compound expressed by formula (I) as a first component; expressed by any one of formulas (II-a) to (II-d) as a second component; and expressed by formula (III) or (IV) as a third component; and as a fourth component, a chiral component in the amount necessary for maintaining the ratio d/P of the cell thickness d (.mu.m) to the pitch length of twist P (.mu.m) in the range of 0.4 to 0.6 when the liquid crystal composition is used for liquid crystal display devices. ##STR1## wherein R.sup.1 to R.sup.9 represent an alkyl group having 1 to 10 carbon atoms; Z.sup.0 to Z.sup.4 represent, for example, --CH.sub.2 CH.sub.2 --; A.sup.1 to A.sup.4, B, C, E, and G independently represent, for example, 1,4-cyclohexylene or 1,4-phenylene; D represents 1,4-cyclohexylene or 1,3-pyrimidine-2,5-diyl; Q.sup.1 represents H or F; and q and m are independently 0 or 1.
    • 在满足STN显示模式所要求的各种特性的同时,为了特别应对高速响应,具有较小的伽马值(V10 / V90)和小的tau(快速响应速度)的液晶组合物。 这些组合物包含至少一种由式(I)表示的化合物作为第一组分; 由式(II-a)至(II-d)中的任一个表示作为第二组分; 并由式(III)或(IV)表示为第三组分; 作为第四成分,将液体厚度d(μm)的比d / P与捻数P(μm)的间距长度保持在0.4〜0.6的范围内所需的量的手性成分, 液晶组合物用于液晶显示装置。 (II-c)(II-c)(II-c)(II-c)(II-d)R6(B)Z2(C)R7(Ⅲ) R8(D)Z3(E)Z4(G)R9(IV)其中R1至R9表示具有1-10个碳原子的烷基; Z 0〜Z 4表示例如-CH 2 CH 2 - ; A1至A4,B,C,E和G独立地表示例如1,4-亚环己基或1,4-亚苯基; D代表1,4-亚环己基或1,3-嘧啶-2,5-二基; Q1表示H或F; q和m独立地为0或1。
    • 5. 发明授权
    • Liquid crystal composition and electro-optic display device
    • 液晶组成和电光显示装置
    • US5776366A
    • 1998-07-07
    • US741720
    • 1996-10-31
    • Yoshitaka TomiTetsuya MatsushitaFusayuki TakeshitaKatsuyuki MurashiroEtsuo Nakagawa
    • Yoshitaka TomiTetsuya MatsushitaFusayuki TakeshitaKatsuyuki MurashiroEtsuo Nakagawa
    • G02F1/13C09K19/02C09K19/30C09K19/46C09K19/58C09K19/52
    • C09K19/586C09K19/0208C09K19/3001C09K19/3003C09K19/46C09K2019/0444
    • A chiral, nematic liquid crystal composition suitable to STN-LCD, having superior steepness, rapid response and being able to prevent occurrence of high order and low order domain of LCD, which composition contains as a first component, at least one compound expressed by the formula (1) ##STR1## as a second component, at least one compound expressed by the formula (2) ##STR2## and as a third component, at least one compound of benzonitrile group, ##STR3## and further having a chiral dopant as a fourth component. In the above formulas, R.sup.1 and R.sup.2 each represent a linear alkyl group of 1 to 10 carbon atoms, A and B each represent trans-1,4-cyclohexylene or 1,4-phenylene, and R.sup.3 represents a linear alkyl group of 1 to 10 carbon atoms, or a group wherein an optional --CH.sub.2 -- or two or more not adjacent --CH.sub.2 --s present in the above group are replaced by --O-- or --CH=CH--; X.sup.1 and X.sup.2 each independently represent H or F; C represents --COO--, --C.sub.2 H.sub.4 --, trans-1,4-cyclohexylene or 1,4-phenylene; and n represents 0 or 1, and as a fourth component, a chiral dopant in a quantity in which a ratio (d/p) of the thickness (d.mu.m) of a liquid crystal layer in a liquid crystal cell to be filled with the liquid crystal composition to the helical pitch thereof (p.mu.m) is 0.03 to 2.0.
    • 适用于STN-LCD的手性向列型液晶组合物,其具有优异的陡度,快速响应性并且能够防止LCD的高阶和低阶畴的发生,该组合物含有作为第一组分的至少一种化合物 式(1)作为第二组分的至少一种化合物作为第二组分,至少一种由式(2)表示的化合物(2)和作为第三组分的至少一种苄腈基化合物,< IMAGE> 3),并且还具有手性掺杂剂作为第四组分。 在上式中,R 1和R 2各自表示1〜10个碳原子的直链烷基,A和B各自表示反式-1,4-亚环己基或1,4-亚苯基,R3表示1〜 10个碳原子,或其中存在于上述基团中的任选的-CH 2 - 或两个或更多个不相邻的-CH 2 -S取代为-O-或-CH = CH-的基团; X1和X2各自独立地表示H或F; C表示-COO - , - C 2 H 4 - ,反式-1,4-亚环己基或1,4-亚苯基; n表示0或1,作为第四成分的手性掺杂剂,其中液晶单元中待填充的液晶层的厚度(dμm)的比值(dμm) 液晶组合物的螺旋间距(μm)为0.03〜2.0。