摘要:
The invention relates to a polymerizable liquid crystal material comprising at least one polymerizable surface-active compound, its use for the preparation of anisotropic polymer films, and the use of the liquid crystal material and the polymer films in optical and electrooptical devices, for decorative and security applications.
摘要:
Die vorliegende Erfindung betrifft flüssigkristalline Medien die mindestens eine Verbindung der Formel I und mindestens eine Verbindung der Formel II
worin die Parameter die in Anspruch 1 gegebene Bedeutung besitzen, enthalten, die Verwendung dieser flüssigkristallinen Medien in elektrooptischen Anzeigen, sowie diese Anzeigen, insbesondere STN-LCDs.
摘要翻译:液晶介质含有氟代和氰基取代的苯基酯以及氰基取代的苯基 - 环己烷化合物。 液晶介质含有式(I)的氟代和氰基取代的苯基酯以及式(II)的氰基取代的苯基 - 环己烷化合物。 R 1 = 1-7C烷基或烷氧基或2-7C烷氧基烷基,烯基或烯氧基; Y 1,Y 21和Y 22 = H或F; R 2 = 2-7C烯基或烯氧基。
摘要:
The invention relates to a fluoro-substituted alkenyl compound represented by formula (1) wherein Y 1 , Y 2 , Y 3 and Y 4 are each independently H or F, provided that at least one of Y 1 and Y 2 is F; Q 1 is a single bond or an alkylene group of 1 - 20 carbon atoms, at least one -CH 2 - being optionally substituted by -O-, provided that two or more -O- are not adjacent to each other; Q 2 is a single bond or -C≡C-; Rings A 1, A 2 and A 3 are each independently a cyclohexane ring, a dioxane ring, a cyclohexene ring, a pyrimidine ring, a pyridine ring, or a benzene ring, or a benzene ring having at least one hydrogen atom substituted by F; Z 1, Z 2 and Z 3 are each independently a single bond, -CH 2 CH 2 -, -CH 2 O-, -OCH 2 -, -COO-, -OCO-, -CH=CH-, -C≡C-, -CF 2 O-, or -OCF 2 ; and m and n are each independently 0 or 1; provided that Y 3 is F when Ring A 3 is a cyclohexane ring and Z 3 is a single bond. The liquid crystal composition comprising the compound, when used in liquid crystal display elements for various modes, excels in driving voltage and contrast.
摘要:
A liquid-crystal compound which exhibits high voltage retention and low threshold voltage, has very small dependency upon the temperature, has a large DELTA n value, and has excellent compatibility with other liquid-crystal materials at low temperatures; a liquid-crystal composition comprising the same; and a liquid-crystal display element made by using the same. The liquid-crystal compound is a terphenyl derivative represented by general formula (1), wherein R represents a straight-chain or branched alkyl group having 1 to 20 carbon atoms and the methylene groups (-CH2-) not adjacent to each other in the alkyl group may be substituted by an oxygen atom; X represents a halogen atom, -OCF3, -OCF2H, -CF3, -CF2H, or -CFH2; Y1, Y2, Y3, Y4, Y5, and Y6 each independently represent H or F, provided that at least two of Y1, Y2, Y3, and Y4 represent fluorine and each atom constituting this compound may be substituted by an isotopic atom.
摘要:
Provided is a liquid crystal medium for an electro-optical liquid crystal display of an IPS mode which does not cause burning and which is suitable for achieving a relatively low threshold voltage and a short response time. The liquid crystal medium for an IPS mode display comprising 5 to 30 % by weight of the first component (compound of Formula I) and 5 to 50 % by weight of the second component (compound of Formula II) or the liquid crystal medium comprising 100 % by weight of this liquid crystal medium and 5 to 30 % by weight of the third component (compound of Formula III): wherein R 1 to R 3 represent a C 1 to C 10 alkyl group, an alkoxy group or an oxalkyl group (containing 1 to 4 oxygen atoms), or a C 2 to C 10 alkenyl group; X represents transcyclohexylene or phenylene; A represents -CO-O- or a single bond; and Y 1 represents a hydrogen atom or a fluorine atom.
摘要:
Novel liquid-crystal compounds which have an especially large value of DELTA epsilon and a satisfactory compatibility with other liquid-crystal compounds and show a nematic phase in a wide temperature range without detriment to the properties inherent in liquid-crystal fluorine compounds; a liquid-crystal composition containing the same; and a liquid-crystal display element prepared by using the composition. The compounds include phenyl polyhaloalkyl ether derivatives represented by general formula (1): wherein X and X each independently represents 1,2-ethylene, 1,4-butylene, or a covalent bond, provided that not both represent covalent bonds; R represents C1-20 alkyl in which at least one methylene group may have been replaced with oxygen, vinylene, or ethynylene; Y represents -OCF2CFH-(CF2)n-F (wherein n is 0, 1, 2, or 3) or -OCF2Cl; the rings A and A each independently represents 1,4-cyclohexylene, 1,4-cyclohexenylene, or 1,4-phenylene and A represents 1,4-phenylene, provided that at least one carbon atom in each ring may have been replaced with oxygen or nitrogen and at least one hydrogen atom present on each ring may have been replaced with fluorine or chlorine; m is 0 or 1; and each constituent element of the molecule may contain at least one of the isotopes thereof.