| Patent Number |
Title Of Patent |
Date Issued |
| 7052742 |
Five membered-ring compounds and utilization thereof in liquid crystal mixtures |
May 30, 2006 |
| Fluorinated five-membered ring compounds of the formula (I) R.sup.1--X--(A.sup.1--M.sup.1).sub.a--(A.sup.2--M.sup.2).sub.b--A.sup.3--- Y--E (I) where E is a radical T--Z--R.sup.2 containing a five-membered ring and, for example, T is undirected and is 4-fluorothiophene-2,5-diyl, 3-f |
| 6824707 |
Active matrix liquid crystal device and smectic liquid crystal mixture |
November 30, 2004 |
| A smectic liquid crystal mixture comprising a smectic liquid crystal base mixture and at least one dopant, which is either a complex ligand or an organic material, in a concentration of 0.01 to 5.0 weight percent. |
| 6811832 |
Ortho substituted benzaldehydes, preparation thereof and use thereof |
November 2, 2004 |
| Compounds of the formula (I): ##STR1##in which X.sup.1 =H or F, X.sup.2 =H or F, and Y=Cl, Br or I, are prepared by reacting, in a solvent or solvent mixture at a temperature below -60.degree. C., a halobenzene of the formula (II) with an organic lithium compound and then with a form |
| 6793984 |
Fluorinated (dihydro)phenanthrene derivatives, and their use in liquid-crystalline media |
September 21, 2004 |
| The invention relates to liquid-crystalline (dihydro)phenanthrene derivatives of the formula I ##STR1##in which R, G, A.sup.1, Z.sup.1, m, L.sup.1, L.sup.2, L.sup.3, L.sup.4, L.sup.5 and Y are as defined in claim 1, and to liquid-crystalline media comprising at least one (dihydro) |
| 6759103 |
Fluorinated cyclopenta[b]naphthalenes and their use in liquid-crystal mixtures |
July 6, 2004 |
| The invention relates to compounds of the formula (I) and also liquid-crystal mixtures comprising these compounds, and their use in liquid-crystal displays: ##STR1##in which R.sup.1 is H, F, CF.sub.3, OCF.sub.3, OCF.sub.2 H, OCFH.sub.2, an alkyl radical or alkyloxy radical or an a |
| 6746731 |
Ferroelectric active matrix displays with wide operating temperature range |
June 8, 2004 |
| The active-matrix display contains a chiral smectic liquid-crystal mixture comprising at least one compound of the formula (I)where the symbols are as defined in the description. |
| 6737125 |
Fluorinated cyclopenta[a]naphthalenes and their use in liquid-crystal mixtures |
May 18, 2004 |
| Compounds of the formula (I), liquid-crystal mixtures comprising these compounds, and their use in liquid-crystal displays: ##STR1##in which R.sup.1 is H, F, CF.sub.3, OCF.sub.3, OCF.sub.2 H, OCFH.sub.2, an alkyl radical or alkyloxy radical or an alkenyl radical or alkenyloxy radical; |
| 6704086 |
Monostable ferroelectric active-matrix display |
March 9, 2004 |
| The monostable ferroelectric active matrix display contains a liquid crystal layer in from of a monodomain with an unambiguously defined direction of the normal z to the layer of the smC* phase and is characterized by the fact that the normal z to the layer and the preferential direc |
| 6682785 |
Fluorinated anthracenes, and their use in liquid-crystal mixtures |
January 27, 2004 |
| The invention relates to compounds of the formula (I) having a fluorinated anthracene or fluorinated tetrahydroanthracene core structure and to liquid-crystal mixtures comprising these compounds and to the use thereof in liquid-crystal displays. |
| 6677479 |
Substituted fluoroaromatics, process for preparing them and their use |
January 13, 2004 |
| Compounds of the formula (I) and also process for preparing them ##STR1##where substituents X.sup.1, X.sup.2, Y and Z are defined as follows: X.sup.1 is H or F X.sup.2 is H or F Y is CI, Br, or I Z is CHO or COOH or CN n is 0 or 1and also their use as starting material for prepari |
| 6670514 |
Fluorinated polycycles and their use in liquid-crystal mixtures |
December 30, 2003 |
| Compounds of the formula (I) ##STR1##in which: R.sup.1 is H, F, CF.sub.3, OCF.sub.3, OCF.sub.2 H, OCFH.sub.2, an alkyl radical or an alkenyl radical; R.sup.2 is H, an alkyl radical or alkyloxy radical or an alkenyl or alkenyloxy radical; G.sup.2 --G.sup.1 is --CH.dbd.CH--, --CH. |
| 6661494 |
Monostable ferroelectric active matrix display |
December 9, 2003 |
| The monostable ferroelectric active matrix display comprises a liquid-crystal layer in the form of a monodomain having an unambiguously defined direction of the layer normal z of the smC* phase, the liquid-crystal layer preferably having a chevron C-1, chevron C-2 or bookshelf geomet |
| 6616989 |
Isoxazole derivatives, and their use in liquid-crystalline mixtures |
September 9, 2003 |
| Isoxazole derivatives of the formula (I) ##STR1##where the symbols and indices have the following meanings, for example: T is ##STR2## X is S or O R.sup.1 and R.sup.2 are identical or different and are each hydrogen, F, CN or a straight-chain or branched C.sub.1 -C.sub.20 -alkyl |
| 6605323 |
Monostable ferroelectric active matrix display |
August 12, 2003 |
| In a monostable ferroelectric active matrix display comprising a liquid-crystal layer in the form of a monodomain having an unambiguously defined direction of the layer normals z of the smC* phase, the layer normals z and the preferential direction n of the nematic or cholesteric pha |
| 6551668 |
Monostable ferroelectric active matrix display |
April 22, 2003 |
| In a monostable ferroelectric active matrix display comprising a liquid-crystal layer in the form of a monodomain having an unambiguously defined direction of the layer normal z of the smC* phase, the layer normals z and the preferential direction n of the nematic or cholesteric phas |
| 6515163 |
Hydrogenated phenanthrenes and their use in liquid-crystal mixture |
February 4, 2003 |
| The invention concerns hydrogenated phenanthrenes of formula I ##STR1##wherein the parameters have the meanings given in the text and their use in liquid crystal compositions. |
| 6495220 |
Disubstituted phenanthrenes and their use in liquid-crystal mixtures |
December 17, 2002 |
| Compounds of the formula (I)in which: R.sup.1 is an alkyl radical having 1 to 8 carbon atoms or an alkenyl radical having 2 to 8 carbon atoms, where, in each case, one (nonterminal) --CH.sub.2 -- group may also be replaced by --O-- or --C(.dbd.O)O-- and/or one or more H may be replace |
| 6485797 |
5-Arylindane derivatives and ferroelectric liquid crystal mixture containing same |
November 26, 2002 |
| A ferroelectric liquid crystal mixture, especially useful for operation in the .tau.V.sub.min -mode, comprises a 5-Arylindane derivative of the formula (I), ##STR1##wherein Y is CH, CF or N and R.sup.1 (--A.sup.1 --M.sup.1).sub.a (--A.sup.2 --M.sup.2).sub.b --, (M.sup.3 --A.sup |
| 6482479 |
Active matrix displays having high contrast values |
November 19, 2002 |
| An active matrix display comprises a chiral smectic liquid crystal mixture which has the phase sequence I--N*--SmC*, a spontaneous polarization in the operating temperature range of <40 nC/cm.sup.2 and a pitch of >10 .mu.m at at least one temperature in the nematic or cholesteric |
| 6482478 |
Fluorinated derivatives of phenanthrene and the utilization thereof in liquid crystal mixtures |
November 19, 2002 |
| Fluorinated derivatives of phenanthrene, and their use in liquid-crystal mixtures Fluorinated phenanthrene derivatives of the formula (I) ##STR1## in which G.sub.1 is --CH.dbd.CH-- or --CH.sub.2 CH.sub.2 -- X is H or F Y is H or F, and R.sup.1 and M.sub.1 --A.sub.1 --R.sup |
| 6465060 |
Tetrahydrothiophene derivatives, and their use in liquid-crystalline mixtures |
October 15, 2002 |
| Tetrahydrothiophene derivatives of the formula (I)where the symbols and indices have the following meanings, for example: T is undirected and is tetrahydrothiophene-2,5-diyl or tetrahydrothiophene-2,4-diyl R.sup.1 is hydrogen or a straight-chain or branched C.sub.1-20 -alkyl or C.sub.2 |
| 6436489 |
Fluorine-containing benzothiazoles, and their use in liquid-crystalline mixtures |
August 20, 2002 |
| Benzothiazoles of the formula (I) are used as components of liquid-crystal mixtures ##STR1##where the symbols and indices preferably have the following meanings: X.sup.1 and X.sup.2, independently of one another, are --CH--, --CF--, the --(R.sup.1)--C-- group or the --(R.sup.1 --A.sup |
| 6403172 |
Benzothiophenes, and their use in liquid-crystalline mixtures |
June 11, 2002 |
| Benzothiophene derivatives of the formula (I) are used as components of liquid-crystal mixtures ##STR1##where the symbols and indices have the following meanings:X.sup.1 and X.sup.2, independently of one another, are --CH--, --CF--, the --(R.sup.1)C-- group or the --(R.sup.1 --A.sup.1 -- |
| 6372307 |
Chip card with a bistable display |
April 16, 2002 |
| The present invention relates to a chip card containing a ferroelectric liquid-crystal display containing a ferroelectric liquid-crystal display containing a ferroelectric liquid-crystal layer in which the liquid-crystal layer has optical anisotropy values of .ltoreq.0.15 in the regi |
| 6231786 |
Fluorinated azoles, and their use in liquid-crystalline mixtures |
May 15, 2001 |
| In the fluorinated azoles of the formula (I)the symbols and indices have -the following meanings:T is undirected and is4-fluorothiazole-2,5-diyl, 5-fluorothiazole-2,4-diyl, 4-fluorooxazole-2,5-diyl, 5-fluorooxazole-2,4-diyl or 4-fluoroisoxazole-2,5-diyl;R.sup.1 and R.sup.2 are identical or d |
| 6171519 |
Ferroelectric liquid crystal mixture |
January 9, 2001 |
| A ferroelectric liquid crystal mixture having a negative value of .DELTA.e and allowing a high speed response and a low voltage driving, as well as a liquid crystal display devise using the crystal mixture of the invention. The ferroelectric liquid crystal mixture according to the invent |
| 6022492 |
Difluorophenyl pyrimidyl pyridine derivatives and the use thereof in liquid crystal mixtures |
February 8, 2000 |
| Difluorophenylpyrimidylpyridine derivatives of the formula (I) ##STR1## wherein X is N and Y is CH or X is CH and Y is N;R.sup.1 and R.sup.2 are identical or different and area) an unbranched or branched alkyl chain having 1 to 20 carbon atoms, whereaa) one or more non-adjacent and non-termi |
| 5942618 |
1-fluor-5,6,7,8-tetrahydroisoquinoline derivatives, and their use in liquid-crystal line mixture |
August 24, 1999 |
| 1-Fluoro-5,6,7,8-tetrahydroisoquinoline derivatives, and their use in liquid-crystalline mixtures1-Fluoro-5,6,7,8-tetrahydroisoquinoline derivatives of the formula (I)in which the symbols and indices have the following meanings:the group B is ##STR1## R.sup.1 and R.sup.2 are, for example |
| 5911913 |
1-fluoroisoquinoline derivatives and the use thereof in liquid crystalline mixtures |
June 15, 1999 |
| 1-Fluoroisoquinolinc derivatives of the formula (I)where the group B is ##STR1## R.sup.1 and R.sup.2 are alkyl radicals having 1 to 20 carbon atoms; M.sup.1, M.sup.2, M.sup.3, M.sup.4, M.sup.5, and M.sup.6 are --O--, --CO--O, --O--CO-- or a single bond;A.sup.1, A.sup.2, A.sup.3 and A |
| 5904877 |
Trifluoratetrahydroisoquinoline derivatives, and the use thereof in liquid-crystalline mixtures |
May 18, 1999 |
| 1,8,8-Trifluoro-5,6,7,8-tetrahydroisoquinoline derivatives, and their use in liquid-crystalline mixtures 1,8,8-Trifluoro-5,6,7,8-tetrahydroisoquinoline derivatives of the formula (I)in which the symbols and indices have the following meanings:the group B is ##STR1## R.sup.1 and R |
| 5888422 |
Fluorinated phenanthrene derivatives and their use in liquid-crystal mixtures |
March 30, 1999 |
| Fluorinated phenanthrene derivatives of the formula (I) ##STR1## in which the symbols and indices have the following meanings: E.sup.1, E.sup.2, E.sup.3, E.sup.4, E.sup.5 and E.sup.6 are identical or different and are --N--, --CF-- or --CH--;G is --CF.sub.2 CF.sub.2 -- or --CF.dbd.CF |
| 5882546 |
1,8-Difluorisoquinoline derivatives and the use thereof in liquid crystalline mixtures |
March 16, 1999 |
| 1,8-Difluoroisoquinoline derivatives of the formula (I)in which the symbols and indices have the following meanings: the group B is ##STR1## R.sup.1 and R.sup.2 are, for example, alkyl radicals having 1 to 20 carbon atoms;M.sup.1, M.sup.2, M.sup.3, M.sup.4, M.sup.5 and M.sup.6 are, f |
| 5876628 |
Compounds for use in liquid-crystal composition |
March 2, 1999 |
| Ferroelectric liquid crystal mixtures containing compounds of the formula (I): ##STR1## wherein R.sup.1 is, for example, a straight-chain or branched alkyl radical having 1 to 22 carbon atoms, in which one --CH.sub.2 -- group may be replaced by --O-- or --CO--O--. |
| 5874023 |
1-Fluoro-6,7-dihydro-5H-isoquinolin-8-one derivatives and the use in liquid crystalline mixtures |
February 23, 1999 |
| 1-Fluoro-6,7-dihydro-5H-isoquinolin-8-one derivatives of the formula (I)where B, R.sup.1, R.sup.2, M.sup.1, M.sup.2, M.sup.3, M.sup.4, M.sup.5 M.sup.6, A.sup.1, A.sup.2, A.sup.3, and A.sup.4 are various defined substituents and a, b, c, d, e are zero or one, with the proviso that the sum |
| 5872301 |
Bifunctional precursors for the preparation of liquid crystals |
February 16, 1999 |
| Bifunctional compounds of the formula (I), ##STR1## in which: ##STR2## are naphthalene-2,6-diyl or ##STR3## is naphthalene-2,6-diyl or ##STR4## U, X, Y and Z are --CH.dbd., --CF.dbd. and --N.dbd., with the proviso that --CF.dbd. and --N.dbd. may each only be repre |
| 5849959 |
Derivatives of 2, 3, 6-trifluorophenols and a process for their preparation |
December 15, 1998 |
| The present invention relates to compounds of the formula (1) ##STR1## where R is H, a straight-chain or branched alkyl radical with 1 to 6 carbons, a fluorinated straight-chain or branched alkyl radical with 1 to 6 carbons, a benzyl radical, or a benzyl radical substituted by an alk |
| 5847149 |
Thiadiazole derivatives, process for their preparation, and their use as precursors for the prod |
December 8, 1998 |
| Thiadiazole derivatives of the formula (I)in which the symbols and indices have the following meanings:X is Cl, Br or I;B is 1,3,4-thiadiazole-2,5-diyl;A.sup.1, A.sup.2 and A.sup.3 are identical or different and are substituted or unsubstituted 1,4-phenylene, pyrazine-2,5-diyl, pyridazine-3,6-di |
| 5776363 |
Compounds having side chains with multiple methyl branches and their use in liquid-crystal mixtu |
July 7, 1998 |
| Compounds of the formula (I) having side chains with multiple methyl brancheswhere* is a chiral carbon atom;A.sup.1, A.sup.2, A.sup.3, A.sup.4 are, for example, 1,4-phenylene, pyrimidine-2,5-diyl or 1,3,4-thiadiazole-2,5-diyl;M.sup.1, M.sup.2, M.sup.3, M.sup.4 are, for example, --CO--O-- or |
| 5702638 |
Phenanthridine derivatives, and their use in liquid-crystalline mixtures |
December 30, 1997 |
| Phenanthridine derivatives, and their use in liquid-crystalline mixturesA ferroelectric liquid-crystal mixture containing one or more phenanthridine derivatives of the formula (I) ##STR1## E.sup.1 and E.sup.2 are identical or different and are --N--, --CF-- or --CH--;R.sup.1 and R.su |
| 5648021 |
Phenanthrene derivatives and their use in liquid-crystalline mixtures |
July 15, 1997 |
| 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 applications. Depending on the choice of substituents, they can be used as base materials fro |
| 5025097 |
4-chlorooxazole derivatives and processes for their preparation and use |
June 18, 1991 |
| The invention relates to 4-chlorooxazole derivatives of the general formula I ##STR1## which carry an unsaturated group in the 2- or 5-position, e.g., the --CH.dbd.CH-- or --CH.dbd.CH--CH.dbd.CH-- group.In the formulaR.sub.1 is phenyl, which is optionally substituted in one or more p |
| 4892799 |
4-chlorooxazole derivatives and processes for their preparation and use |
January 9, 1990 |
| The invention relates to 4-chlorooxazole derivatives of the general formula I ##STR1## which carry an unsaturated group in the 2- or 5-position, e.g., the --CH.dbd.CH-- or --CH.dbd.CH--CH.dbd.CH-- group.In the formulaR.sub.1 is phenyl, which is optionally substituted in one or more p |
