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4777280 |
Phenylbenzoate 1-cyanoalkoxy compounds
The preparation and properties of liquid crystal compounds having an achiral core and chiral tail units composed of the 1-cyanoalkoyl grouping (chiral cyanohydrin ethers) are described. The newly...
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4769448 |
Electrically conductive liquid crystalline substance and polymer
An electrically conductive liquid crystalline substance represented by the general formula L-S 1 -C T or L-C T , wherein L is a residue of a liquid crystalline substance, S 1 is an atom or...
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4764619 |
Optically active compounds, smectic liquid crystal compositions containing them and smectic liquid crystal display devices
An optically active compound having the formula: ##STR1## wherein each of Z and Z' is a single bond, --COO--, --OCO--, --CH 2 CH 2 --, --OCH 2 -- or --CH 2 O--, R is an alkyl group having from...
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4759869 |
Liquid crystalline carbonic acid ester and liquid crystal composition containing same
A ferroelectric liquid crystal compound having superior properties and a chiral smectic liquid crystal composition are provided. The ferroelectric liquid crystal compound is expressed by the...
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4756847 |
4'-cyano-3'-halogenophenyl 4-(5-substituted-pyrimidin-2-yl)benzoate derivatives and liquid crystal composition comprising same
Novel compounds which, when used as a components of liquid crystal compositions, have good compatibility with other components and also have large values of dielectric anisotropy and optical...
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4753752 |
Secondary alcohol derivatives for use in liquid crystal materials and devices
Novel compounds for use in ferroelectric smectic liquid crystal mixtures are provided, having a general formula: ##STR1## where R 1 is alkyl, alkoxy, alkylcarbonyloxy or alkoxy-carbonyl, ##STR2##...
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4751018 |
Alpha-methylcinnamic acid ester derivative and liquid crystal composition
Disclosed is an α-methylcinnamic acid ester derivative represented by the formula: ##STR1## wherein n is an integer of from 5 to 18, R 1 represents an optically active group of the formula...
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4741859 |
Thermochromic liquid crystal materials and devices
A novel method of preparing thermochromic liquid crystal mixtures is provided in which mixtures which show an injected smectic phase at lower temperatures than their thermochromic cholesteric phase...
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4733949 |
Liquid crystal display device
In a liquid crystal display device produced by forming an orientation controlling film on each surface of upper and lower substrates having an electrode, placing a liquid crystal composition...
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4729639 |
Dual frequency addressable liquid crystals and methods of use
A twisted nematic liquid crystal material used in a dual-frequency addressable liquid crystal cell is disclosed. Specific materials include an eutectic mixture of 2-5 monoester compounds having the...
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4721367 |
Liquid crystal device
A liquid crystal compound represented by the formula (I) below or a liquid crystal composition containing the compound is interposed between a pair of base plates. ##STR1## wherein R is an alkyl or...
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4708441 |
Esters
Compounds of the formula ##STR1## wherein X 2 is a single covalent bond or --COO--; X 1 is a single covalent bond, --COO--, --CH 2 CH 2 -- or when X 2 is --COO--, X 1 also can be p--C 6 H 4 ...
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4709030 |
Novel liquid crystal mixtures
Liquid crystalline mixtures containing compounds of the formula ##STR1## wherein n stands for the number 0 or 1; X 1 and X 2 denote single covalent bonds or one of the symbols X 1 and X 2 also...
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4707296 |
Alkoxyethoxybenzoic acid ester derivatives
A novel liquid crystal compound having a large positive dielectric anisotropy value and when added to a liquid crystal composition, forming no deposit in the resulting composition at low...
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4702558 |
Liquid crystal information storage device
A liquid crystal information storage device comprising a layer of material containing a side chain polymeric liquid crystal. At least a part of the material is heated from a viscous state above its...
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4699731 |
Liquid crystal material for a thermal writing liquid crystal element
The liquid crystal material for use in a thermal writing liquid crystal element. The material contains essentially two components (a) and (c) or three components (a), (b) and (c); (a) one or...
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4695650 |
Liquid crystal compounds and compositions containing same
Liquid crystals having the general formula: ##STR1## wherein R is an alkyl group of three to twelve carbon atoms, R' is an alkyl of five to twelve carbon atoms, and X is a chlorine atom or a...
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4694098 |
Colorless liquid crystalline compounds
A colorless liquid crystalline compound having at least one 6-membered ring and non-cyclic end groups in the molecular skeleton, said 6-membered ring containing two or more carbon atoms, at least...
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4689176 |
Novel optically active compound and liquid crystal composition containing same
A novel optically active compound suitable for use in a display mode utilizing a ferroelectric liquid crystal, and a chiral smectic liquid crystal composition containing the same are provided,...
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4683079 |
Liquid-crystal 4-n-pentylphenyl esters of 4'-(trans-4"-n-alkylcyclohex-2-enoyloxy)benzoic acids
Liquid crystal 4-n-pentylphenyl esters of 4'-(trans-4"-n-alkylcyclohex-2-enoyloxy(benzoic acids of the general formula: ##STR1## wherein R is C 2 H 5 , n--C 3 H 7 .
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4670182 |
Nematic liquid crystalline composition
A nematic liquid crystalline composition comprising (a) a compound represented by the general formula ##STR1## wherein R represents a linear alkyl group having 1 to 10 carbon atoms, and R'...
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4664840 |
Liquid crystal compounds
Anisotropic compounds of the following formula: ##STR1## wherein ##STR2## is selected from the group consisting of ##STR3## Z represents a covalent bond or a carboxyl group --C(O)O--, R is selected...
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4661283 |
Benzoate derivatives having a large positive dielectric anisotropy value and liquid crystal compositions containing same
A novel organic compound usable as a component of liquid crystal compositions having a positive value of dielectric anisotropy and a liquid crystal composition usable as a material for...
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4659499 |
Liquid crystal materials
A liquid crystalline material for use in optic displays has the general formula: ##STR1## wherein R 1 and R 2 can be the same or different and are generally an alkyl group having from 1 to 12...
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4653866 |
Liquid crystal compound and liquid crystal composition including the same
A liquid crystal compound of the formula: R 2 --X 1 --Y 1 --C(O)S--Y 2 --Z, wherein R 2 is preferably C 7 -14 alkyl; X 1 is --COO-- or --OCO; ##STR1## and Z is --NO 2 or --CN, shows a...
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4647398 |
Liquid-crystalline carbonic acid esters and liquid crystal compositions containing same
Novel chiral smectic ester compounds suitable for a display mode utilizing ferroelectric liquid crystals, and liquid crystal compositions containing the same are provided, which compounds are...
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4645305 |
Liquid-crystal compound, liquid crystal composition and liquid crystal display device
The present liquid crystal compounds are novel ester-type compounds showing a smectic liquid crystal phase and being capable of increasing a dielectric constant anisotropy, represented by the...
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4643842 |
Liquid crystal composition
A liquid crystal composition comprising at least one optically active liquid crystal compound represented by the following general formula: ##STR1## wherein R 2 stands for a linear alkyl group and...
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4629290 |
Liquid crystal compounds and method of preparation
Asymmetric trans-4,4'-dialkyl-ONN-azoxybenzenes having the general formula: ##STR1## wherein R 1 and R 2 are straight-chain alkyl groups having from 1 to 10 carbon atoms and R 1 ≠R 2 are...
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4627933 |
Liquid crystalline phases containing alkylene-type bridges
Compounds of the formula R 1 --Q 1 --(CH 2 ) m --(COO) n --(CH 2 ) p --Q 2 --R 2 wherein R 1 and R 2 are each independently alkyl or alkoxy each of 1-12 C atoms, F, Cl, Br, CN or --Q 3...
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4622165 |
Liquid crystal mixture of a liquid crystal compound having a smectic C phase and an optically active compound
A liquid crystal composition which comprises a liquid crystal compound having a smectic C phase and an optically active substance, both of said liquid crystal compound and optically active...
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4621900 |
Liquid crystal compositions
Liquid crystal compositions including as the main component at least one P, P'-dialkylazoxyhenzene selected from Compounds (1) of the general formula: ##STR1## wherein R 1 represents a...
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4622162 |
Liquid crystal composition
A liquid crystal composition which comprises of at least one compound selected from each of the following groups of compound: the first group which consists of compounds expressed as the...
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4617141 |
Trans-4-alkyloxymethyl-1-(4'-substituted biphenylyl-4)cyclohexanes
Novel liquid crystal compounds having a higher clearing point and a superior stability are provided, which are trans-4-alkyloxymethyl-1-(4'-substituted biphenylyl-4)cyclohexanes expressed by the...
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4613209 |
Smectic liquid crystals
The use of a certain class of liquid crystal materials that exhibit a smectic C phase allows the production of a bistable liquid crystal display element. Such bistable display elements promote the...
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4609256 |
Liquid crystal optical device
A liquid crystal optical device having improved dielectric relaxation at low frequency is provided. The liquid crystal optical device includes a liquid crystal panel having an optically active...
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4596667 |
Liquid crystalline compounds and mixtures thereof
Novel ferroelectric liquid crystalline compounds having a superior stability and chiral, smectic liquid crystalline compositions containing at least one kind of the same are provided, which...
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4589996 |
Liquid crystalline carbonic acid esters and liquid crystal compositions containing the same
A novel chiral liquid crystalline compound having an optically active group and a liquid crystal composition containing the same are provided, which compound is expressed by the general formula...
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4588518 |
Nematic liquid crystal composition for display devices
A nematic liquid crystal composition comprising (a) at least one compound of the formula: ##STR1## wherein R 1 is n--C m H 2m +1, n--C m H 2m +1 --O or n--C m H 2m +1 --CO; R 2 is n--C q H 2q...
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4584120 |
Liquid crystal compound and liquid crystal composition
The liquid crystal compound of this invention is characterized by having the general formula. R--X--X'--COO--Y--Y'--R' wherein R and R' each represent an alkyl group, and X, X', Y and Y' each...
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4577931 |
Liquid crystal composition
Liquid crystal display devices including liquid crystal compositions of cyclohexanecarboxylic esters and esters having an acyloxyl group have excellent time-sharing characteristics, low duty ratio...
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4576732 |
Ferroelectric liquid crystal compounds and liquid crystal compositions
The present invention is characterized by a smectic liquid crystal compound represented by the following formula: ##STR1## wherein R is selected from alkyl and alkoxy groups; X from ##STR2## m and...
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4576733 |
4-Halogenobenzoic acid esters
A novel 4-halogenobenzoic acid derivative useful as a component constituting a liquid crystal composition having a large value of dielectric anisotropy and also a large value of optical anisotropy,...
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4550981 |
Liquid crystalline esters and mixtures
Compounds of the formula ##STR1## wherein X 2 is a single covalent bond or --COO--; X 1 is a single covalent bond, --COO--, --CH 2 CH 2 -- or when X 2 is --COO--, X 1 also can be p--C 6 H 4 ...
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4542230 |
Liquid crystals esters
A liquid crystal ester has a structure: ##STR1## where X and Y are fluorine or hydrogen at least one being hydrogen, and Z is either: (a) ##STR2## where R 2 is alkyl, alkoxy, alkylcarbonyloxy or...
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4528114 |
Acetylenes
Compounds of the formula ##STR1## wherein ring B stands for 1,4-phenylene or a trans-1,4-disubstituted cyclohexane ring and A stands for a group with 1 to 3 six-membered rings, which together with...
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4528115 |
Liquid crystal composition and liquid crystal display device
A liquid crystal composition comprising a mixed phase of the six kinds of the compounds such as ##STR1## and a liquid crystal display device of the multiplex drive type such as liquid crystal...
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4505837 |
Liquid crystalline phenylcyclohexene derivatives
A phenylcyclohexene of the formula ##STR1## wherein n is 1 or 2, X is --H, --R, --OR, --OCOR, --OCOOR, --CF 3 or --F, and when n is 1, X can also be ##STR2## R is alkyl of 1-8 C atoms and when two...
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4490277 |
Mesomorphic material with low optical anisotropy and process for producing same
A mesomorphic material contains at least one compound "A" ensuring a positive dielectric anisotropy of the material and a compound "B" ensuring a lowered value of optical anisotropy of the...
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4490015 |
Liquid crystal color display panel
The present invention provides a liquid crystal color display panel of improved positive contrast by utilizing the so-called Guest-Host effect.
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