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5705094 |
Antiferroelectric liquid crystal composition and liquid crystal display element using the same
The antiferroelectric liquid crystal composition comprising at least one chiralsmectic liquid crystal compound having a positive specific rotatory power α! D 25 and at least one chiralsmectic...
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5705095 |
Partially fluorinated benzene derivatives
Compounds of the formula I ##STR1## in which R 1 , R 2 , A 1 , A 2 , Z 1 , Z 2 , L 1 , L 2 , L 3 , m and n are as defined herein, are suitable as component of liquid-crystalline media.
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5702639 |
Use of complex ligands for ions in ferroelectric liquid-crystal mixtures
A ferroelectric liquid crystal mixture containing two or more components, at least one of which is a complex ligand for ions, in particular for cations, is particularly suitable for use in...
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5702640 |
High-multiplexed supertwist liquid-crystal display
The invention relates to improved high-multiplexed supertwist liquid crystal displays in which each pixel is addressed by orthogonal row waver forms, the improvement wherein the nematic liquid...
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5700393 |
Liquid crystalline compounds
The present invention is concerned with photo cross-linkable liquid crystalline compounds of the general formula ##STR1## wherein A 1 and A 2 each are a cross-linkable mesogenic residue; and A...
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5698134 |
Electrooptical system
The invention relates to an electrooptical system which between 2 electrode layers contains a liquid crystal mixture and a further optically transparent polymer medium, in which one of the...
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5695681 |
Liquid-crystalline allenes
Liquid-crystalline allenes of the formula I ##STR1## where M is a mesogenic group, R 1 and R 2 are hydrogen or a C-organic radical having 1-8 carbon atoms, R 3 is a C-organic radical...
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5686021 |
Liquid crystal display device, methods of producing and driving the liquid crystal display device, and liquid crystal composition
A liquid crystal display device, which containing a liquid crystal in each display element comprising at least two oriented liquid crystal phases including a most-quickly-responding liquid crystal...
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5683624 |
Liquid crystal composition
A LC material for TN and STN modes having a comparatively high Δn and a low viscosity is provided by a LC composition comprising a first component (formula I-c), a second component (formula II-c)...
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5683623 |
Dioxane derivatives
Dioxane derivatives for use as components in liquid crystal devices (LCDs) of general formula (A), wherein X is CH or B; R 1 , R 2 are each A 1 , OA 1 , OCOA 2 , or COOA 2 ; A 1 is a straight or...
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5681504 |
Optically active tolanes
A chiral dopant of the formula ##STR1## wherein ring A is 1,4-phenylene which is optionally substituted with one or more fluorine atoms, chlorine atoms, bromine atoms, cyano groups, or methyl...
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5679282 |
Chiral 2,6-difluorobenzene derivatives
The invention relates to chiral 2,6-difluorobenzene derivatives of the formula I ##STR1## in which MG is a mesogenic group containing no ester groups, or a group which in combination with ##STR2##...
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5679285 |
Vinylene compounds and liquid-crystalline medium
Vinylene compounds of the formula I ##STR1## in which R, A 1 , Z 1 , X, L 1 , L 2 and m have the meaning given in claim 1 are suitable as components of liquid-crystalline media.
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5679288 |
Blend of polyphosphate flame retardant and liquid crystalline additive
The disclosure teaches a blend of a predominant amount of a polyphosphate flame retardant and an effective amount of a liquid crystalline additive for viscosity reduction and compatibilization when...
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5676878 |
Liquid crystal polymers
A liquid crystal polymer or copolymer is disclosed of structure (A) where X=CN, COR, CO 2 R, CHO, CF 3 ; R=branched chain, straight chain or chiral alkyl; .rect-hollow.=any suitable mesogenic...
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5667722 |
Antiferroelectric liquid crystal compound and antiferroelectric liquid crystal composition containing the same
An antiferroelectric liquid crystal compound represented by the following general formula (I): ##STR1## wherein R 1 represents an alkyl group having 6 to 16 carbon atoms; R 2 represents a...
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5667721 |
Liquid crystalline di-1,3-dioxane derivatives
Liquid crystalline compounds having two dioxane rings, the dipole moments of which are unidirectional. These are compounds of the general formula ##STR1## wherein A and B each independently is...
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5665270 |
Optically active trifluorolactic acid derivative and liquid crystal composition
An optically active compound derived from a novel trifluorolactic acid, useful as a component of a ferroelectric liquid crystal composition, and a liquid crystal composition. A compound represented...
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5665271 |
Silacyclohexane compounds, preparation thereof, liquid crystal compositions comprising the same, and liquid crystal devices comprising the compositions
Silacyclohexane compounds of the following formula (I) or (II) along with intermediate compounds therefor are described ##STR1## wherein R is an organic residue, one of ##STR2## represents a...
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5662829 |
Fluorocyclohexene-dioxane derivatives
Compounds of the following formula are useful as liquid crystals: ##STR1## wherein R is a C 1 -C 12 alkyl or a C 2 -C 12 alkenyl; A is a single bond or trans-1,4-cydohexylene; Z 1 and Z...
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5662828 |
Compound having unsaturated side chain, process for preparing the same, liquid crystalline polymer prepared from the same, liquid crystal mixture and display element
A compound having an unsaturated side chain represented by the formula: ##STR1## in which A and B are the same and different and represent an aromatic or heterocyclic group or either one of A and B...
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5658492 |
Smectic C liquid crystal composition and a liquid crystal display element
A composition containing a smectic C compound, having a Δε of negative value and enabling to effect a high speed response; a ferroelectric chiral smectic C liquid crystal composition using the...
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5658489 |
Diphenylacetylene compound, process for preparing the same and liquid crystal composition and element comprising the same
A diphenylacetylene compound of the formula [1]: ##STR1## wherein R is a C 1 -C 12 alkyl group, a C 2 -C 12 alkenyl group or a C 2 -C 16 alkoxyalkyl group; X 1 , X 2 , X 3 , X 4 , Y 1 , Y 2 ,...
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5653913 |
Mesomorphic compound, liquid crystal composition containing the compound, liquid crystal device using the composition, liquid crystal apparatus and display method
A mesomorphic compound of the formula (I) according to claim 1 characterized by having at least one CF 2 group between CH 2 groups in a specific alkoxy alkyl terminal group is suitable as a...
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5653912 |
Liquid crystal compositions
Disclosed are liquid crystal compositions each comprising a first component (formula (I)), a second component (formula (II)), a third component (formulae (III) to (V)) and a fourth component...
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5651918 |
Optically active 1,3-dioxolane derivatives carrying a mesogenic radical in the 4-position, a process for their preparation and their use as doping agents in liquid-crystal mixtures
Optically active 1,3-dioxolane derivatives which carry a mesogenic radical in the 4-position and have the general formula (I) ##STR1## are suitable for use as doping agents in liquid-crystal...
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5650092 |
Silacyclohexane compounds, a liquid crystal composition comprising the same and a liquid crystal device comprising the composition
A silacyclohexane compound of the following formula (I) ##STR1## wherein R is an unsubstituted or substituted organic residue, W is H, F, Cl or methyl, X is CN, F, Cl or an unsubstituted or...
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5648021 |
Phenanthrene derivatives and their use in liquid-crystalline mixtures
This invention relates to novel phenanthrene derivatives of the formula (I) which are particularly suitable for use in liquid-crystal mixtures. The compounds of formula (I) have a broad range of...
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5643495 |
1,2,2,2-tetrafluoroethyl ethers, and liquid-crystalline medium
1,2,2,2-Tetrafluoroethyl ethers of the formula I R--(A 1 --Z 1 ) m --A 2 --Z 2 A 3 --O--CHF--CF 3 (I) are suitable as components of liquid-crystalline media wherein R is H, a substituted...
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5641429 |
Fluorobenzene derivatives and liquid-crystalline medium
Fluorobenzene derivatives of formula I, ##STR1## in which R an alkenyl radical as further defined in the specification, A 1 and A 2 are a trans-1,4-cyclohexylene radical, 1,4-phenylene radical...
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5641430 |
Silacyclohexane compounds, preparation thereof, liquid crystal compositions comprising the same, and liquid crystal devices comprising the compositions
A silacyclohexane compound of the following formula (I) or (II) ##STR1## wherein R is an organic residue, ##STR2## represents an unsubstituted or substituted trans-1-sila-1,4-cyclohexylene group or...
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5641428 |
Use of optically active 1,3-dioxolane-4-carboxylates as dopes in liquid-crystal mixtures, liquid-crystal mixtures containing these compounds, and novel optically active 1,3-dioxolane-4-carboxylates
Optically active, mesogenic 1,3-dioxolane-4-carboxylates are suitable as dopes in liquid-crystal mixtures. They result in liquid-crystalline ferroelectric phases having short switching times and in...
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5641427 |
Liquid crystal composition, liquid crystal device using the composition liquid crystal apparatus and display method
A liquid crystal composition includes at least one fluorine-containing mesomorphic compound (a) having a fluorocarbon terminal portion and a hydrocarbon terminal portion, and at least one optically...
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5637254 |
Ferroelectric liquid-crystalline polymers, a process for their preparation and their use in electrooptical components
A ferroelectric, liquid-crystalline polymer is composed of repeating units of the formula (I) ##STR1## in which Y=H, CH 3 or F, R 1 =a radical having at least two chiral centers such as for...
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5637255 |
Chiral dioxolanes
Chiral dopants of the formula ##STR1## in which n represents the number 0 or 1; R 3 denotes a group of the general formula ##STR2## A 1 , A 2 and A 3 , independently of one another, represent...
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5635107 |
Fluorine-containing five-membered ring compounds, and a liquid-crystaline medium containing them
Fluorine-containing five-membered ring compounds of the formula I R 1 -(A 1 -Z 1 ) m -A 2 -Z 2 -W I in which W is ##STR1## is a cyclohexane, cyclohexene or phenyl, Y 1 is O or S, ...
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5635106 |
Liquid crystal composition and cells containing it
A liquid crystal composition comprising a low molecular weight liquid crystal in the interior of which a cross-linking network is formed by polymerization of a prepolymer of formula I: ##STR1## X...
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5635108 |
Liquid crystalline compound having conjugated carbon chain and liquid crystal composition containing
A hexynediene derivative expressed by the following general formula I and liquid crystal compositions containing the derivative are disclosed: ##STR1## wherein R 1 and R 2 independently represent...
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5630962 |
2-Fluoropyridines, their preparation and their use in liquid crystal mixtures
2-Fluoropyridines, processes for their preparation and their use in ferroelectric liquid crystal mixtures A 2-fluoropyridine of the formula (I) ##STR1## in which the symbols have the following...
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5626792 |
High birefringence liquid crystal compounds
High birefringence liquid crystal dopants having the formula: R 1 X--C--.tbd.--D--T wherein C and D, independently of one another, are aromatic ring systems each of which has one or two 5-member...
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5626791 |
Aromatic compounds, and their use in liquid-crystalline mixtures
An aromatic compound of the formula (I) R 1 (--A 1 ) a (--M 1 ) b (--A 2 ) c (--M 2 ) d --B(--M 3 ) c (--A 3 ) f (--M 4 ) g (--A 4 ) h --R 2 (I) in which ...
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5624600 |
Optically active compound, liquid crystal composition containing the compound, liquid crystal device using the composition, liquid crystal apparatus and display method
An optically active compound represented by a formula (I) characterized by containing an oxazolidinone-3,5-diyl skeleton directly connected to cyclic groups in 3 and 5 positions is suitable as a...
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5622648 |
Reactive liquid crystal compounds
Disclosed are liquid crystal compounds of formula I R 1 --P--X--(A 1 --Z 1 ) n --A 2 --R 2 I wherein R is ##STR1## W is H, Cl or C 1 -5 -alkyl, and m is 1-7, P is C 1 -12 alkylene, one...
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5611957 |
Ferroelectric liquid crystal device
Multiplex addressed ferroelectric liquid crystal devices containing liquid crystal mixtures composed of components A, B and C. Component A consists of one or more optically active compounds capable...
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5609790 |
Liquid crystal compositions
A liquid crystal composition which shows an antiferroelectric smectic phase in a wide temperature range including room temperatures, and allows high speed operation at a low voltage. A liquid...
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RE35462 |
Silylated benzoic acid derivatives
The present invention relates to compounds of the formula ##STR1## in which Z is a halogen atom, a cyano group or a hydroxyl group, n is 0, 1 or 2, R' is a radical of the formula ...
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5599479 |
Ferroelectric chiral smectic liquid crystal composition 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 (I): ##STR1## wherein R 1 denotes a linear or...
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5595684 |
Optically active tetrahydropyran derivative, liquid crystal composition, and liquid crystal device containing the same
An optically active tetrahydropyran derivative represented by one of the following general formulae, a liquid crystal composition containing the derivative, and a liquid crystal device containing...
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5593616 |
Optically inactive, mesomorphic compound, liquid crystal composition containing the compound, liquid crystal device using the composition, liquid crystal apparatus and display method
An optically inactive mesomorphic compound represented by the following formula (I): ##STR1## wherein R denotes a linear or branched alkyl group having 1-18 carbon atoms or a linear or branched...
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5593617 |
Photochemically polymerizable liquid crystals
The present invention is related to photochemically polymerizable liquid crystals of the general formula ##STR1## wherein A 1 , A 2 and A 3 are, independently, photochemically polymerizable...
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