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Inventor:
Hirschmann; Harald
Address:
Darmstadt, DE
No. of patents:
45
Patents:












Patent Number Title Of Patent Date Issued
8585922 Liquid-crystalline medium November 19, 2013
The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula I ##STR00001## in which R.sup.0, ring A and L.sup.1-4 have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.
8268191 Liquid-crystalline medium and liquid-crystal display September 18, 2012
The present invention relates to dielectrically positive liquid-crystalline media comprising one or more compounds of the formula I ##STR00001## in which the parameters have the meaning indicated in the specification, and optionally one or more compounds selected from the group of
8236390 Liquid-crystalline medium August 7, 2012
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds, characterized in that it comprises one or more compounds of the formula I ##STR00001## in which R.sup.1, X.sup.1, L.sup.1-5 have the meanings indicated in Claim 1, and to the use thereof for
7923079 Liquid-crystalline medium and liquid-crystal display comprising 1,2-difluoroethene compounds April 12, 2011
The present invention relates to a liquid-crystalline medium comprising 1,2-difluoroethene compounds of the general formula I, in which R.sup.1, ring A, Z.sup.1, Z.sup.2, m, X and L.sup.1-6 are as defined in Claim 1. The invention also relates to the use of the medium for electro-optical
7807236 Liquid-crystalline medium October 5, 2010
The invention relates to a liquid-crystalline medium, characterised in that it comprises one or more compounds of the formula I ##STR00001## in which R.sup.0, L.sup.1, n, A and B have the meanings indicated in Claim 1, furthermore to novel compounds of the formula I, to processes for th
7767277 Fluorophenyl compounds for liquid-crystalline mixtures August 3, 2010
Disclosed are compounds of formula I ##STR00001## processes for the preparation thereof, and liquid-crystalline media and electro-optical displays containing said compounds.
7740918 Liquid crystalline medium and liquid crystal display June 22, 2010
A dielectrically positive liquid crystalline media comprising: a first dielectrically positive component, component A, comprising a dielectrically neutral compound of formula I ##STR00001## wherein the parameters have the meanings defined herein; a second dielectrically positi
7658978 Liquid crystalline medium February 9, 2010
The invention relates to a liquid crystalline medium containing one or more compounds of formula I, wherein R.sup.1 and R.sup.2 have the meanings described in claim 1, to its use for electrooptical purposes, and to displays containing this medium. ##STR00001##
7651742 Liquid-crystalline medium and liquid-crystal display comprising 1,2-difluoroethene compounds January 26, 2010
The present invention relates to a liquid-crystalline medium comprising 1,2-difluoroethene compounds of the general formula I, in which R.sup.1, ring A, Z.sup.1, Z.sup.2, m, X and L.sup.1-6 are as defined in claim 1. The invention also relates to the use of the medium for electro-optical
7563491 Liquid crystalline medium and liquid crystal display July 21, 2009
A dielectrically positive liquid crystalline media comprising: a first dielectrically positive component, component A, comprising a dielectrically neutral compound of formula I ##STR00001## wherein the parameters have the meanings defined herein; a second dielectrically positi
7442419 Liquid-crystalline medium and liquid-crystal display October 28, 2008
Disclosed are a liquid-crystalline medium, the use thereof for electro-optical purposes, and displays containing this medium, characterised in that the medium contains one or more compounds of formula I ##STR00001## and one or more compounds selected from compounds of formulae K-1 t
7438956 Liquid-crystalline medium and liquid-crystal display October 21, 2008
Disclosed are liquid-crystalline medium, use thereof for electro-optical purposes, and displays containing this medium, wherein the medium contains one or more compounds of formula I ##STR00001## and one or more compounds of formulae K-1 to K-11, containing a CF.sub.2O bridge.
7314653 Liquid-crystal medium and electro-optical display containing same January 1, 2008
Disclosed are nematic liquid-crystal media which have an initial current density of 0.05 .mu.A/cm.sup.2 or less and a threshold voltage of 1.0 V or less and their use in liquid-crystal displays, preferably TN or STN displays.
7255811 Tolane derivatives and liquid crystalline medium August 14, 2007
Tolane compounds of the formula I ##STR00001## wherein R.sup.1, R.sup.2, L.sup.1, L.sup.2 and L.sup.3 are as defined herein, are described. Further described are liquid-crystalline media comprising at least one tolane compound of formula I as well as liquid-crystal display elements
7220464 Nematic liquid-crystal mixture, and displays containing same May 22, 2007
A nematic liquid-crystal mixture contains a compound of formula I ##STR00001## in which R.sup.11 and R.sup.12 are as defined in the specification, and a liquid-crystal displays containing same.
7198828 Liquid-crystalline medium April 3, 2007
The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A ##STR00001## and at least one compound of the formula B ##STR00002## in which R.sup.a, R.sup.b, Y, Z.sup.1, Z.sup.2, L.sup.1, L.sup.2, L.sup.3, L.
7052744 Liquid-crystalline mixtures May 30, 2006
Nematic liquid-crystal mixtures comprising one or more compounds of the formula I ##STR00001## in which R.sup.1 and R.sup.2 are as defined herein, are suitable for use in TN and STN liquid-crystal displays.
7048974 Liquid crystal mixtures May 23, 2006
The invention relates to TN and STN liquid-crystal displays and to the nematic liquid-crystal mixtures used therein, characterised in that they comprise one or more compounds of the formula I ##STR00001## and one or more compounds of the formula II ##STR00002## in which ring A, R.sup.1
7041347 1,4-Di-(trans-4-cyclohexyl)benzene derivatives and their use in liquid crystal media and liquid May 9, 2006
Liquid-crystalline media comprising one or more compounds of the formula I ##STR00001## in which R.sup.a, R.sup.b, L and r are as defined herein, are suitable for use in, for example, TN and STN liquid crystal displays
6902777 Liquid-crystalline medium June 7, 2005
A liquid-crystalline mediums which contain one or more compounds of the formula A ##STR1##and at least one compound of the formula B ##STR2##wherein compounds of formula A contain at least one ring selected from ##STR3##and in which R.sup.a, R.sup.b, ring A and ring B, Y, Z.sup.1, Z.
6890606 Nematic liquid-crystal composition May 10, 2005
The invention relates to nematic liquid-crystal compositions comprising bisalkenyl compounds of the formula I ##STR1##and to their use in plasma-addressed LCDs.
6821582 Liquid-crystalline mixtures November 23, 2004
A liquid-crystalline mixture that contains one or more compounds of each of the formulae IA, IB and IC ##STR1##and to the use thereof in TN, STN and IPS displays.
6808763 Liquid-crystalline medium October 26, 2004
The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A ##STR1##and one more compounds of the formula B ##STR2##in which R.sup.a, R.sup.b, R.sup.bb, x and L.sup.1 are as defined in claim 1.
6730372 Liquid-crystalline medium May 4, 2004
The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A ##STR1##and at least one compound of the formula B ##STR2##in which R.sup.a, R.sup.b, Y, Z.sup.1, Z.sup.2, L.sup.1, L.sup.2, L.sup.3, L.sup.4, L.sup
6649229 STN liquid crystal display November 18, 2003
The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angular dependences and to the novel nematic liquid-crystal mixtures employed therein, which are distinguished by the fact that they comprise at least one compoun
6613401 Liquid-crystalline medium September 2, 2003
Liquid-crystalline media comprising one or more compounds of formula A ##STR1##and at least one compound of formula B ##STR2##are suitable for use in TN and STN displays.
6569503 STN liquid-crystal display May 27, 2003
The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependencies, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished in that they comprise at least one compound of the form
6555186 TN and STN liquid-crystal displays April 29, 2003
The invention relates to TN and STN liquid-crystal displays and to the novel nematic liquid-crystal mixtures used therein, characterized in that they comprise one or more compounds of the formula I ##STR1##in which R.sup.1, R.sup.2, A, u, L.sup.1 and L.sup.2 are as defined herein.
6544602 Supertwist liquid-crystal displays and liquid-crystal mixtures therefor April 8, 2003
The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependencies, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished in that they comprise at least one compound of the form
6531194 STN liquid-crystal display March 11, 2003
The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angular dependences and to the novel nematic liquid-crystal mixtures employed therein, which are distinguished by the fact that they comprise at least one compoun
6514579 TN and STN liquid crystal displays February 4, 2003
The invention relates to TN and STN displays having very short switching times and good steepness and angular dependence and to the novel nematic liquid crystal mixtures employed therein, which are distinguished by comprising at least one compound of formula IA, ##STR1##where R.su
6497828 Nematic liquid-crystal composition December 24, 2002
The invention relates to nematic liquid-crystal compositions comprising bisalkenyl compounds of the formula Ia. ##STR1##in which R.sup.1 and R.sup.2, are each independently alkenyl having 2 to 8 carbon atoms, and Z.sup.2 is a single bond, --(CH.sub.2).sub.2 -- or trans-CH.dbd.CH--.
6444279 Liquid crystal propene or propenyl nitrile derivatives September 3, 2002
Acetylene derivatives of the formula I ##STR1##in whichR, A.sup.1, A.sup.2, Z.sup.1, Z.sup.2, Z.sup.3, L.sup.1, L.sup.2, L.sup.3, Y, m and n are as defined hereinare suitable as components of liquid-crystalline media.
6403171 TN and HTN liquid-crystal display June 11, 2002
TN and HTN liquid-crystal displays having very short response times and good steepness values and angle dependencies, are obtained using nematic liquid-crystal mixtures which comprise compounds of formula IA in combination with compounds of the formula IC: ##STR1##in whichR.sup.1 to
6183821 STN liquid-crystal display February 6, 2001
Supertwist liquid-crystal displays (SLCDs) with outstanding properties are obtained if the nematic liquid-crystal mixtures used therein comprise one or more compounds of the formula IA ##STR1##and one or more compounds of the formula IB ##STR2##R.sup.a is alkyl, alkoxy, alkenyl or al
6174572 Nematic liquid-crystal composition January 16, 2001
The invention relates to nematic liquid-crystal compositions comprising bisalkenyl compounds of the formula I ##STR1##and to their use in plasma-addressed LCDs.
6171664 Tolan derivatives, and liquid-crystalline medium January 9, 2001
The invention relates to tolan derivatives of the formula I ##STR1##in which R.sup.1, R.sup.2, A, Z, L.sup.1, L.sup.2, L.sup.3, L.sup.4, L.sup.5, L.sup.6, Q, m and n are as defined herein.
6126857 Bisalkenylbicyclohexanes, and liquid-crystalline medium October 3, 2000
The invention relates to bisalkenylbicyclohexanes of the formula I ##STR1## in which R.sup.1, R.sup.2 and Z are as defined in claim 1, and to their use in liquid-crystalline media.
6080451 STN liquid crystal display June 27, 2000
Supertwist liquid crystal displays (STN displays) of excellent characteristics are obtained if the nematic liquid crystal mixtures used therein comprise at least one compound of the formula IA ##STR1## and at least one compound of the formula IB ##STR2## in which R.sup.a, R.s
6063456 STN liquid-crystal display May 16, 2000
Supertwist liquid-crystal displays (SLCDs) with outstanding properties are obtained if the nematic liquid-crystal mixtures used therein comprise at least one compound selected from the formulae 1A and 1B ##STR1## and at least one compound of the formula 1C ##STR2## in which R
6056894 TN and STN liquid-crystal display May 2, 2000
TN liquid-crystal displays and supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependencies are obtained by using nematic liquid-crystal mixtures which comprise at least one compound of formula IA ##STR1## and at least on
6054193 Supertwist liquid-crystal display April 25, 2000
Supertwist liquid-crystal displays having excellent properties are obtained if the nematic liquid-crystal mixture comprises at least one compound of the formula I: ##STR1## and at least one compound of the formula I.sup.* : ##STR2## in which R.sup.1 is alkyl, alkoxy, alkenyl
6028655 TN and STN liquid-crystal display February 22, 2000
The invention relates to TN liquid-crystal displays and supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependences, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished by the fact that they
5997767 STN liquid-crystal display December 7, 1999
The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependences, and to the nematic liquid-crystal mixtures according to the invention used therein, which are distinguished by the fact that they comprise at l
5976404 Supertwist liquid-crystal display November 2, 1999
Supertwist liquid-crystal displays having excellent properties are obtained if the nematic liquid-crystal mixture comprises at least one compound of the formula I ##STR1## and at least one compound of the formula I' ##STR2## in which Alkenyl is an alkenyl radical having 2 to










 
 
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