| 摘要 |
<p>#CMT# #/CMT# Liquid crystal medium (Q) comprises a first dielectrically positive component (A) containing one or more fluoromethoxy substituted benzene compounds (Ia), one or more fluoro substituted benzene compounds (Ib), and one or more another fluoro substituted benzene compounds (Ic), optionally a second dielectrically positive component containing one or more fluoro substituted benzene compounds (II) and substituted benzene compound (III), and optionally a dielectrically neutral component (C) containing one or more cyclohexane compounds (IV). #CMT# : #/CMT# Liquid crystal medium (Q) comprises a first dielectrically positive component (A) containing one or more fluoromethoxy substituted benzene compounds of formula (Ia), one or more fluoro substituted benzene compounds of formula (Ib), and one or more another fluoro substituted benzene compounds of formula (Ic); optionally a second dielectrically positive component containing one or more fluoro substituted benzene compounds of formula (II) and substituted benzene compound of formula (III); optionally a dielectrically neutral component (C) containing one or more cyclohexane compounds of formula (IV). R 1>1-7C-alkyl, 1-7C-alkoxy, fluorinated 1-7C-alkyl or fluorinated 1-7C-alkoxy, 2-7C-alkenyl, 2-7C-alkenyloxy, 2-7C-alkoxyalkyl or fluorinated 2-7C-alkenyl; ring A 1> 1>-ring A 1> 3>, ring A 1> 8>, ring A 1> 9>, ring A 2> 1>-ring A 3> 2>cyclohexan-1,4-yl, cyclohexen-1,4-yl, cyclohexen-3,6yl, [1,3]dioxan-2,5-yl, tetrahydro-pyran-2,5-yl, benzen-1,4-yl, 2-fluoro-benzen-1,4-yl or 1,3-difluoro-benzen-2,5-yl; ring A 1> 4>-ring A 1> 6>benzen-1,4-yl, 2-fluoro-benzen-1,4-yl or 1,3-difluoro-benzen-5,2-yl; ring A 1> 7>cyclohexan-1,4-yl, cyclohexen-1,4-yl, cyclohexen-3,6yl, [1,3]dioxan-2,5-yl or tetrahydro-pyran-2,5-yl; Z 1> 1>-Z 1> 5>-CH 2CH 2-, -CF 2CF 2-, -COO-, trans-CH=CH-, trans-CF=CF-, -CH 2O-, -CF 2O- or a bond; L 1> 1>, L 1> 2>H, F or Cl; R 2>, R 3>1-7C-alkyl, 1-7C-alkoxy, fluorinated 1-7C-alkyl or fluorinated 1-7C-alkoxy, 2-7C-alkenyl, 2-7C-alkenyloxy, 2-7C-alkoxyalkyl or fluorinated 2-7C-alkenyl; L 2> 1>, L 2> 2>, L 3> 1>, L 3> 2>H or F; X 2>, X 3>halo, halogenated 1-3C-alkyl or alkoxy, or halogenated 2-3C-alkenyl or alkenyloxy; Z 3>-CH 2CH 2-, -CF 2CF 2-, -COO-, trans-CH=CH-, trans-CF=CF-, -CH 2O- or a bond; m, n : 0-3; R 4> 1>, R 4> 2>R 2>; ring A 4> 1>, ring A 4> 2>cyclohexan-1,4-yl, cyclohexen-1,4-yl, cyclohexen-3,6-yl, benzen-1,4-yl, 2-fluoro-benzen-1,4-yl, 1,3-difluoro-benzen-2,5-yl or 2,3-difluoro-benzen-1,4-yl; Z 4> 1>, Z 4> 2>-CH 2CH 2-, -COO-, trans-CH=CH-, trans-CF=CF-, -CH 2O-, -CF 2O-, -C?=C- or a bond; and p : 0-2. When: X 2>is not F or OCF 3, m is 2; and X 3>is not F or OCF 3, and Z 3>is not a bond, n is 2. An independent claim is included for a liquid crystal display comprising (Q). #CMT#[Image]#/CMT# #CMT#[Image]#/CMT# #CMT#[Image]#/CMT# #CMT#USE : #/CMT# (Q) is useful in: a liquid crystal display (claimed), which is twisted nematic-, twisted nematic-automatic message display, electrically controlled birefringence-automatic message display, vertically aligned nematic-automatic message display, automatic message display-in-plane switching-, fringe field switching-automatic message display-liquid crystal displays, thin-film transistors, optically compensated bend display; and compound system, preferably polymer dispersed liquid crystal, nematic curvilinearly aligned phases, polymer nematic liquid crystal display, preferably in axially symmetric microdomain-plasma array liquid crystal display. The electro-optical displays are used in liquid crystal display monitors in televisions and multimedia applications. #CMT#ADVANTAGE : #/CMT# (Q) exhibits: low viscosities, preferably low rotational viscosities; low response times; high dielectric anisotropy. (Q) requires low voltage. (Q) provides liquid crystal display with improved operating characteristics, such as storage capacity. #CMT#ELECTRONICS : #/CMT# Preferred Components: The liquid crystal display is directed by an active matrix. #CMT#[Image]#/CMT# #CMT#[Image]#/CMT# #CMT#ORGANIC CHEMISTRY : #/CMT# Preferred Components: The concentration of the component (A) is 5-40%. The component (A) contains one or more (Ia), in which Z 1> 3>is a bond. (Q) further comprises a dielectrically neutral component (D) comprising one or more substituted benzene compounds of formula (VI). R 6> 1>, R 6> 2>R 2>; ring A 6>benzen-1,4-yl, 2,3-difluoro-benzen-1,4-yl, 2-fluoro-benzen-1,4-yl, 1,3-difluoro-benzen-2,5-yl, 1,3-difluoro-benzene radical of formula (Xa); Z 6> 1>, Z 6> 2>-CH 2CH 2-, -COO-, trans-CH=CH-, trans-CF=CF-, -CH 2O-, -CF 2O- or a bond; and r : 0-2. #CMT#EXAMPLE : #/CMT# Typical liquid crystal mixture in twisted nematic module comprised of (in %): 4''-(4-butyl-cyclohexyl)-4-(2,2-difluoro-propyl)-3,5,2'-trifluoro-[1,1';4',1'']terphenyl (5); 4''-butyl-4-[difluoro-(3,4,5-trifluoro-phenoxy)-methyl]-3,5,2'-trifluoro-[1,1';4',1'']terphenyl (7); 2-{4'-[difluoro-(3,4,5-trifluoro-phenoxy)-methyl]-3',5'-difluoro-biphenyl-4-yl}-5-propyl-tetrahydro-pyran (5); 5-butyl-2-{4'-[difluoro-(3,4,5-trifluoro-phenoxy)-methyl]-3',5'-difluoro-biphenyl-4-yl}-tetrahydro-pyran (7); 4-butyl-4'-[difluoro-(3,4,5-trifluoro-phenoxy)-methyl]-bicyclohexyl (9); 4-butyl-4'-vinyl-bicyclohexyl (43.5); 4'-methyl-4-(4-vinyl-cyclohexyl)-biphenyl (14); 4-(4-but-3-enyl-cyclohexyl)-4'-methyl-biphenyl (5.5); 4''-ethyl-2'-fluoro-4-propyl-[1,1';4',1'']terphenyl (2); and 4-butyl-4''-ethyl-2'-fluoro-[1,1';4',1'']terphenyl (2).</p> |
