摘要:
A liquid-crystal display produced through a step in which a liquid-crystal composition containing a polymerizable monomer is injected into the space between two substrates and the monomer is polymerized while applying a voltage between opposed transparent electrodes for these substrates, wherein the polymerizable monomer contained in the liquid-crystal composition has one or more ring or fused-ring structures and has a functional group directly bonded to each ring or fused-ring structure. Preferably, the monomer is represented by the following general formula: P1-A1-(Z1-A2)n-P2 wherein P1 and P2 each is acrylate, etc.; A1 and A2 each is 1,4-phenylene, etc.; Z1 is -COO-, etc.; and n is 0 to 2.
摘要:
Disclosed are 1,4-disubstituted 2,6-difluorobenzene compounds of the formula (I), in which R is an unsubstituted alkyl or alkenyl residue with 1-15 C-atoms or an alkyl or alkenyl group with 1-15 C-atoms substituted with at least one halogen residue, whereby one or more CH2 groups can be replaced, independently of each other, by -O-, -S-, (α), (β) -CO-, -CO-O-, -O-CO- or -O-CO-O in such a way that O-atoms are not directly bound to each other, A?1 and A2¿, independently of each other, are (a) a trans-1,4-cyclohexylene residue in which one or more non-adjacent CH¿2? groups can be replaced by -O- and/or -S-, (b) a 1,4-phenylene residue in which one or two CH groups can be replaced by N, (c) a 1,4-cyclohexenylene, 1,4-bicyclo(2,2,2)-octylene, piperidine-1,4-diyl, naphthalene-2,6-dyil, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl residue, whereby residues (a) and (b) can be substituted with CN or one or two fluorine atoms, Z?1 and Z2¿, independently of each other, are -CO-O, -O-CO-, -CH¿2?O-, -OCH2-, -CH2CH2-, -CH=CH-, -C=C- or a single bond, m and n, independently of each other, are 0,1,2 or 3, (m + n) being 1,2 or 3, and X has the same meaning as R, or is F, Cl, -CF3, -OCF3, -OCF2H, -OC2F5, -CN or -NCS, with the provision that at least one of the residues Z1 and Z2 in the molecule is -CO-O-, -O-CO-, -CH2-O-, -OCH2-, -CH2CH2-, -CH=CH- or -C=C- and/or at least one of the residues A?1 and A2¿ in the molecule is (γ) or (δ), and/or n is 1 or 2, whereby when -(Z2-A2)n=(ε). X is F, Cl, -CF3, -OCF3, -OCF2H, -OC2F5, -CN or -NCS. Such compounds are suitable for use as components of liquid-crystal media.
摘要:
Mesogenic compounds with a φ-CF3-alkyl, φ-CF3-alkenyl or φ-CF3-alkinyl terminal group of formula (I), with the meaning of R, Z, Q, (a), (b), m, n and o being indicated in claim 1.
摘要:
L'invention se rapporte à des dérivés de fluoro-chloro-benzène représentés par la formule (I), où R représente un résidu alkyle contenant jusqu'à 12 atomes de carbone, dans lequel un ou deux groupes CH2 non adjacents peuvent également être remplacés par -O- et/ou -HC=CH-, Q représente (a), (b), (c) ou une liaison simple, m est égal à 0 ou à 1, et l'un des radicaux L1 et L2 présents dans la molécule est F et l'autre radical éventuel est l'hydrogène.
摘要:
L'invention concerne des milieux cristallins liquides constitués par un mélange d'au moins deux composés, caractérisés en ce qu'au moins un composé est un oligophényle fluoré selon les formules (I) ou (II).
摘要:
Des dérivés de 2,3-difluorohydroquinone ont la formule (I), dans laquelle R1 et R2 représentent indépendamment l'un de l'autre un alkyle ayant entre 1 et 15 atomes C ou un alkényle ayant entre 3 et 15 atomes C, non substitué ou monosubstitué par du cyanogène ou au moins monosubstitué par du fluor ou du chlore, un groupe CH2 pouvant également être substitué dans ces résidus par -O-, -CO-, -CO-O-, -O-CO-, ou -O-CO-O-; A1, A2 et A3 représentent indépendamment les uns des autres: (a) trans-1,4-cyclohexylène, dans lequel un ou deux groupes CH2 non adjacents peuvent également être substitués par -O- et/ou -S-; (b) 1,4-phénylène, dans lequel un ou deux groupes CH peuvent également être substitués par N; (c) un résidu du groupe composé de pipéridin- 1,4-diyle, 1,4-bicyclo(2,2,2)octylène, 1,3,4-thiadiazol-2,5-diyle, naphtalin-2,6-diyl, décahydronaphtalin-2,6-diyle et 1,2,3,4-tétrahydronaphtalin-2,6-diyle, les résidus (a) et (b) pouvant être substitués une ou plusieurs fois par F, Cl, CH3 ou CN; Z1 représente -CO-O-, -O-CO, -CH2-CH2-, -OCH2-, -CH2O-, -C=C- ou ne liaison simple, Q1 et Q2 représentent indépendamment l'un de l'autre -CO- ou -CH2-; m et n sont égaux à 0, 1 ou 2, et (m + n) est égal à 0, 1 ou 2. Ces dérivés sont utiles comme composants de phases de cristaux liquides.
摘要:
The invention relates to chiral photoisomerizable compounds of formula (I) wherein X?1, X2, X3, X4, X5 and X6¿ have the meanings given in claim 1, to liquid crystalline mixtures and polymers containing them, and to the use of chiral photoisomerizable compounds, liquid crystalline mixtures and polymers containing them in optical and electrooptical devices like liquid crystal displays or projection systems, inoptical elements like polarizers, retardation films, compensators, colour filters or holographic elements, in liquid crystal pigments and coloured films or coatings for decorative or security applications, cosmetic and pharmaceutical compositions, in nonlinear optics and optical information storage.
摘要:
The invention relates to a liquid crystal display device comprising a liquid crystal cell and at least one reflective polarizer or a polarizer combination comprising at least one reflective polarizer as a means to generate circular polarized light, said reflective polarizer comprising an optically active layer of an anisotropic polymer material with a helically twisted planar molecular orientation, wherein the material is oriented so that the axis of the molecular helix extends transversely to the layer, in which the pitch of the molecular helix is varied in such a manner that the difference between the maximum pitch and the minimum pitch is at least 100 nm, characterized in that said reflective polarizer is obtainable by copolymerization of a mixture of a chiral polymerizable mesogenic material comprising: a) at least one achiral polymerizable mesogenic compound having at least one polymerizable functional group in the presence of b) at least one chiral polymerizable mesogenic compound having one polymerizable functional group and/or at least one non-polymerizable chiral mesogenic compound, c) an initiator, d) optionally a non-mesogenic compound having at least one polymerizable functional group, e) optionally a dye and, f) optionally a stabilizer. The invention also relates to methods of manufacturing such a reflective polarizer. The invention further relates to a mixture of a chiral polymerizable mesogenic material used for manufacturing such a reflective polarizer.