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5304323 |
Liquid crystal devices and process for producing the same
A liquid crystal device comprising a pair of substrate, at least one of them being transparent, and a light-control layer supported therebetween, wherein said light-control layer comprises a liquid...
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5300254 |
Ferroelectric liquid-crystal display
The invention relates to ferroelectric liquid-crystal displays having improved multiplexing capability.
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5294367 |
Ferroelectric liquid crystal composition and light switching element comprising the same
A ferroelectric liquid crystal composition is provided exhibiting an Sc* phase over a wide temperature range including room temperature and having a spontaneous polarization value of 30 nC/cm 2 or...
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5292452 |
Alkenylcyclohexane liquid crystalline compounds
Compounds of the formula ##STR1## wherein Z 1 denotes a single covalent bond or --CH 2 Ch 2 --; ring A 1 represents 1,4-phenylene, pyrimidine-2,5-diyl, pyridine-2,5-diyl or, when Z 1 stands...
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5292453 |
Ferroelectric liquid crystal composition with improved driving voltage and temperature margins and liquid crystal device using same
A ferroelectric chiral smectic liquid crystal composition, comprising: at least one optically active compound represented by the following formula (II): ##STR1## wherein R 3 denotes a linear or...
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5290477 |
Optically active compound and liquid crystal composition containing the same
An optically active compound represented by formula (I): ##STR1## wherein R 1 represents an alkyl group having from 3 to 9 carbon atoms; R 2 represents an alkyl group having from 3 to 7 carbon...
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5290478 |
Optically active compounds
Optically active compounds having the following formulae (1), (2) or (3) ##STR1## wherein R and R' are C 1 -20 alkyl groups; X and Y 1 are --, O, S, or divalent groups such as COO, OOC and OCOO; m...
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5288428 |
Liquid crystal compounds having a terminal alkoxy propenyl group
Compounds having a terminal alkyloxypropenyl group of the general formula ##STR1## wherein rings A 1 and A 2 each independently represent unsubstituted or halogen-substituted 1,4-phenylene, in...
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5288427 |
Electrooptical display element
Compounds of the formula I R 1 --A 1 --Z 1 --A--O--R 2 in which R 1 and R 2 , independently of one another, are each alkyl having 1 to 9 C atoms, in which, in addition, one or two CH 2 ...
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5286409 |
Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures
The novel liquid-crystalline mixtures (in the case of ferroelectric behavior they additionally contain an optically active compound as dope) are based on at least two mixture components of the...
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5279762 |
Smectic liquid crystal phases
Compounds of the formula I R 1 --A 1 --A 2 --R 2 I wherein R 1 and R 2 are each alkyl with 1-15 C atoms, and wherein one or two non-adjacent CH 2 groups can also be...
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5278295 |
Pyrrole monomer
A pyrrole polymer membrane having electrical conductivity and liquid crystal properties in the same matrix. The starting pyrrole monomer derivative is illustrated by the formula ##STR1## where R 1 ...
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5275756 |
Fluorine-containing optically active compound and liquid crystal composition containing the same
A fluorine-containing optically active compound represented by formula (I): ##STR1## wherein R 1 represents a straight chain alkyl or alkoxy group having from 6 to 14 carbon atoms or a...
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5275757 |
Liquid crystal compounds and liquid crystal display devices
Novel anti-ferroelectric liquid crystal compounds represented by the following general formula (I) and a liquid crystal display element wherein such a compound is used. ##STR1## Ph represents a...
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5273793 |
Nonlinear optical materials
The present invention is directed to epoxy-based polymeric nonlinear optical materials in which a nonlinear optical active moiety or functionality forms the crosslink between polymer chains and a...
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5271865 |
Liquid-crystalline mixture of low viscosity
The invention relates to a liquid-crystalline mixture containing one or more compounds of the general formula ##STR1## in which R 1 is straight-chain alkyl having 2 to 12 carbon atoms in which, in...
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5271864 |
Ferroelectric liquid crystal compounds with cyclohexenyl cores and compositions containing them
Ferroelectric liquid crystal compounds and compositions containing cyclohexenyl derivatives are provided. Specifically provided are compounds of formula: ##STR1## wherein R 1 and R 2 can be an...
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5268584 |
Strong liquid-crystalline polymeric compositions
Strong liquid-crystalline polymeric (LCP) compositions of matter. LCP backbones are combined with liquid crystalline (LC) side chains in a manner which maximizes molecular ordering through...
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5268123 |
Liquid crystal composition, liquid crystal device, display apparatus and display method
A liquid crystal composition, comprising: at least one mesomorphic compound represented by the following formula (I): ##STR1## and at least one mesomorphic compound represented by the following...
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5264149 |
Liquid crystal compounds having a terminal 1-alkynyl residue
Compounds of the formula ##STR1## wherein n stands for the number 0 or 1; rings A, B and C each independently represent trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl or unsubstituted or...
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5262085 |
Trifluoromethylene compounds
Trifluoromethylene compounds of the formula I ##STR1## which can be used as components of liquid-crystalline media for liquid-crystal and electrooptical display elements.
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5262084 |
Liquid crystal composition
The present invention provides a liquid crystal composition having a high clearing point, a low viscosity, a desired Δn (n e -n o ) and an improved steepness of voltage-transmittance properties...
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5262082 |
Ferroelectric liquid crystal compounds having perfluoroether terminal portions
Fluorine-containing liquid crystal compounds are provided. The compounds comprise a fluorocarbon terminal portion having at least one catenary ether oxygen and a hydrocarbon terminal portion, the...
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5259987 |
Liquid crystal materials
Liquid crystal polymers, which may be used for optical information storage, either alone or in mixture with other liquid crystals, are of the general formula ##STR1## wherein the mesogenic grouping...
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5256330 |
Lactone compound and composition comprising the same
A novel lactone compound exhibiting a larger spontaneous polarization value when added to ferroelectric liquid crystal compositions as a basic substance, than those of so far known lactone...
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5254698 |
Phenyldioxanes
Phenyldioxanes of the formula I ##STR1## wherein R 1 is an alkyl or alkenyl residue each with up to 16 C atoms, wherein one or two non-adjacent CH 2 groups of these residues may be replaced by...
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5252252 |
Anisotropic compounds and liquid crystal mixtures
New anisotropic compounds of the formula (1) are useful in liquid crystal mixtures for electrooptical displays; at least one of the end groups of the compounds (1) is an alkyl group which carries...
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5250220 |
2,5-disubstituted heterocyclic compounds, and a liquid-crystalline medium
Novel 2,5-disubstituted heterocyclic compounds of the formula I ##STR1## in which n is 1 to 10, Het is ##STR2## Ring A is trans-1,4-cyclohexylene or, in the case where Het= ##STR3## X=--OCF 3 ...
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5250219 |
Mesomorphic compound, liquid crystal composition containing same and liquid crystal device using same
A mesomorphic compound represented by the following formula (I): ##STR1## wherein R 1 and R 2 respectively denote a linear or branched alkyl group having 1-16 carbon atoms capable of having a...
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5250222 |
Optically active compounds used for liquid crystalline mixtures
Optically active compounds of the formula ##STR1## wherein R 1 and R 2 each are alkyl with at least 2 carbon atoms; A 1 , A 2 and A 3 each are unsubstituted, cyano-, halogen- or...
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5250221 |
Ferroelectric chiral smectic liquid crystal composition and liquid crystal device using same
A ferroelectric chiral smectic liquid crystal composition, comprising at least one compound represented by the following formula (I): ##STR1## wherein R 1 and R 2 respectively denote a linear or...
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5241036 |
Side-chain liquid crystalline polymer containing crown ether based mesogens
A side-chain liquid crystalline polymer containing crown ether based mesogens having the following structure ##STR1## wherein the polymer backbone is at least partially grafted by the crown ether...
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5240638 |
Ferroelectric liquid crystal composition
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 -2 or less and...
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5238599 |
1,3-dioxane derivatives, methods of preparation and liquid crystal compositions including same
Trans-2-phenyl-5-trans-4'-alkylcyclohexyl-1,3-dioxane derivatives represented by the general formula: ##STR1## wherein R is a linear alkyl group of 1 to 10 carbon atoms, A is a single covalent bond...
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5238598 |
Optically active aromatic compounds, preparation process thereof, and liquid crystal compositions and elements
Disclosed in the present invention are the optically active aromatic compounds having a trifluoromethyl group useful as a component of ferroelectric liquid crystal compositions, a process for...
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5238602 |
Liquid crystals
Compounds of the formula ##STR1## wherein n stands for the number 0 or 1; the rings A 1 , A 2 and A 3 represent 1,4-phenylene, 2-fluoro-1,4-phenylene or trans-1,4-cyclohexylene or one of these...
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5238600 |
Ibimethylenoxy containing liquid crystal compounds
Compounds of the formula R 1 --A 1 --Z 1 --A 2 --(Z 2 --A 3 ) n --R 2 I wherein Z 1 denotes the group --CH 2 CH 2 CH 2 O-- or --OCH 2 CH 2 CH 2 --; n stands for the number 0 or 1; R...
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5236620 |
2,3-difluorobenzene derivatives
Derivatives of difluorobenzene of the formula I R 1 --(--A o --) m --Z 1 --A 1 --Z 2 --A 2 --R 2 I wherein R 1 , R 2 , A o , A 1 , A 2 , Z...
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5236618 |
Liquid crystal phase
Liquid crystal phases containing at least one optically active compound of the formula I ##STR1## wherein X 1 and X 2 independently of one another are each --CO--O-- or --O--CO--, one of X 1 and...
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5234622 |
Alkenyloxyphenylpyrimidine derivatives and liquid crystalline mixtures containing same
Compounds of the formula ##STR1## wherein R 1 signifies a straight-chain alkyl group with 7 to 10 carbon atoms; R 2 represents a straight-chain alkyl group with 1 to 8 carbon atoms; and n...
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5234623 |
Optically active oxazoline compounds, liquid crystal composition containing the same and optical switching method using the same
The present invention discloses novel optically active oxazoline compounds represented by the formula (I): ##STR1## wherein R 1 represents an alkoxy group having not more than 20 carbon atoms and...
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5232624 |
Chiral 1,2-difluorobenzene derivatives
Chiral 1,2-difluorobenzene derivatives are suitable as components of chiral tilted smectic liquid-crystalline phases.
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5230827 |
Derivatives of 2,3-difluorobenzoic acid
Derivatives of 2,3-Difluorobenzoic acid compounds of the formula I ##STR1## in which R 1 and R 2 , independently of one another, are each an alkyl group having 1 to 15 C atoms, in which, in...
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5213708 |
Liquid crystalline compound having negative dielectric anisotropy value
The present invention provides a liquid crystalline compound having a large negative dielectric anisotropy value, a low viscosity and a large birefringence value and a liquid crystal composition...
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5211879 |
Ester compounds and liquid crystal compositions containing the same
This invention provides novel ester compounds represented by the following general formula (1): ##STR1## (wherein R 1 and R 2 are alkyl groups and may be the same or not, A and B are selected...
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5209868 |
Trifluoromethylcyclohexane derivatives
Disclosed are trifluoromethylcyclohexane derivatives of the formula I ##STR1## wherein R is an alkyl or alkenyl radical having up to 18 C atoms which is unsubstituted or substituted by CN or by...
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5209866 |
Heterocyclic 1,2-difluorobenzene derivatives
Heterocyclic 1,2-difluorobenzene derivatives of the formula I ##STR1## in which R 1 and R 2 , in each case independently of one another, are an alkyl groups (sic) having 1-15 C atoms in which, in...
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5207944 |
Liquid crystal composition and liquid crystal display element
A nematic liquid crystal composition is provided having not only a high clearing point and a low viscosity and capable of exhibiting a desired Δn value, but also having an improved steepness in...
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5205962 |
Pyridine derivatives
The invention relates to pyridine derivatives of the formula I ##STR1## wherein R 1 , A 1 , E 1 , n, A 2 , Z 2 , X and Y have the meaning given in claim 1.
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5204018 |
Liquid crystals
Compounds of the formula ##STR1## wherein n stands for the number 0 or 1; R 1 denotes a group R 3 or R 3 --A 3 --Z 2 -- and R 2 denotes a group R 4 or R 4 --A 4 --Z 3 --; ring A 1 ...
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