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| Number | Title | Issue Date |
| 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 ferroelectric liquid crystal displays.... | 12/30/1997 |
| 5679792 | Derivatives of 3-cyclohexylpropionic acid, and the use thereof in ferroelectric liquid-crystal mixtures Compounds of formula I ##STR1## in which R1 and R2 are, for example, an alkyl chain, A is a mesogenic group, and M is a spacer group, are highly suitable as components of liquid-crystal mixtures.... | 10/21/1997 |
| 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 mixtures--in particular ferroelectric liquid-crystal mixtur... | 07/29/1997 |
| 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 electroclinic phases having large electroclinic coefficie... | 06/24/1997 |
| 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 meaning: R1, R2, independently of ... | 05/20/1997 |
| 5594575 | Ferroelectric liquid-crystal systems having three or more chiral additives with different signs of the helical twist in the cholesteric phase Ferroelectric liquid-crystal systems having high spontaneous polarization, in particular >35 nC cm-2, and good orientation properties in the ferroelectric phase, in particular the SC * phase, contain at least three different opticall... | 01/14/1997 |
| 5443754 | Pyridylpyrimidines, a process for their preparation and their use in liquid-crystalline mixtures A pyridylpyrimidine compound of the formula (I) ##STR1## in which A is N and B is CH or A is CH and B is N C is N and D is CH or C is CH and D is N, R1 is, for example, chiral or achiral alkyl having 1 to 16 carbon atoms, R2 is, for ... | 08/22/1995 |
| 5430564 | Process for producing ferroelectric liquid-crystal cells with oleophilic additive employing heat and low pressure overlapped a short time A process for producing a liquid-crystal cell by using a ferroelectric liquid crystal (FLC) composition containing at least one oleophilic substance that exhibits liquid crystallinity and at least one additive having lower boiling point than said substanc... | 07/04/1995 |
| 5407599 | Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures Disclosed and claimed are liquid-crystalline cyclopropylalkyl or -alkenyl or heterocyclic compounds, process for their preparation, and their use in liquid-crystalline mixtures. The novel cyclopropylalkyl or -alkenyl or heterocyclic compounds are of the g... | 04/18/1995 |
| 5384070 | Use of optically active tetrahydrofuran-2-carboxylic acid esters as dopants in liquid-crystal mixtures, liquid-crystal mixtures containing same and novel optically active tetrahydrofuran-2-carboxylic acid esters The use of optically active tetrahydrofuran-2-carboxylic acid esters as dopants in liquid-crystal mixtures, liquid-crystal mixtures containing same and novel optically active tetrahydrofuran-2-carboxylic acid esters. Optically active tetrahydrofuran-2-carboxyl... | 01/24/1995 |
| 5378394 | Ferroelectric liquid-crystalline mixtures The novel ferroelectric liquid-crystalline mixtures are based on at least two mixture components of the general formula (I) ##STR1## but additionally contain at least one optically active dope from one or more of the following groups a) optically act... | 01/03/1995 |
| 5360576 | Chiral alkenylaryl 2,3-epoxyalkyl ethers, and the use thereof in liquid-crystalline mixtures Compounds of the formula (I) in which the symbols have the following meanings: R1 is straight-chain or branched (C3 -C2)alkenyl containing a terminal double bond, it being possible for one or two non-adjacent CH2 | 11/01/1994 |
| 5361152 | Process for producing ferroelectric liquid-crystal cells A process for producing a liquid-crystal cell which comprises the steps of: (a) providing a curable sealant portion in the periphey of the side of an electrode plate that has an electrode or electrodes; (b) (i) coating a ferroelectric liquid-crystal composition on ... | 11/01/1994 |
| 5354500 | Optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them Use of optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them. Optically active 1,3-dioxolane-4-carboxylic esters and oxirane-2-carboxylic esters of ... | 10/11/1994 |
| 5353136 | Ferroelectric liquid crystal with positive dielectric anisotropy, chevron structure and grey scale A method of driving a ferroelectric liquid crystal element which enlarges the effective cone angle. A ferroelectric liquid crystal is held between two substrates such that the helix is suppressed and a chevron layer structure is present. The ferroelectric... | 10/04/1994 |
| 5348684 | Organosilylalkyl or organosilylalkenyl compounds, process for preparing them and their use in liquid-crystalline mixtures The novel silylalkyl or silylalkenyl compounds correspond to the general formula (I) ##STR1## Here the symbols A1, A2, A3 denote aromatic or heteroaromatic molecular units such as 1,4-phenylene or pyrimidine-2,5-... | 09/20/1994 |
| 5328638 | Optically active esters of 5-ethyl- and 5-vinyl-1,3-dioxolane-4-carboxylic acid, their use as doping substances in liquid crystal mixtures and the liquid crystal mixtures containing the new esters Optically active 1,3-dioxolane derivatives of the general formula (I) ##STR1## are suitable as doping substances in liquid crystal mixtures. The symbols in the general formula have the following meaning: R1 has the structure which is analogous ... | 07/12/1994 |
| 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 general formula (I) and at least one carboxylate of the genera... | 02/15/1994 |
| 5257122 | Ferroelectric liquid crystal display having gray steps or a continuous gray scale A ferroelectric liquid crystal switching or display device, in which the liquid crystal film has a constant thickness, wherein one of the glass sheets in the device is planar and the other glass sheet has at least one step. The switching or display device... | 10/26/1993 |
| 5231528 | Ferroelectric liquid crystal components having high spontaneous polarization and low helical pitch What is described is a surface stabilized ferroelectric liquid crystal display with a layer thickness of 1 to 10 μm containing a ferroelectric liquid crystal mixture having a high spontaneous polarization of Ps greater than 20 nC.multidot.cm | 07/27/1993 |
| 5206751 | Process for the production of an impact-resistant liquid crystal switching and display device Addition of coronands and cryptands to FLC-mixtures makes it possible to bring the FLC material into a homogeneous "bookshelf" or "quasi-bookshelf" geometry. When such a FLC mixture is used, displays which have been shock-damaged can be regenerated by app... | 04/27/1993 |
| 5118538 | Electrically conductive polymers and their use as orienting layer in liquid-crystal switching and display elements Switching and display elements based on ferroelectric liquid-crystals often exhibit a pronounced optical hysteresis which results in the appearance of so-called ghost images. This phenomenon can be markedly reduced or even suppressed if at least one of th... | 06/02/1992 |
| 5071589 | 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 constructed from at least 2 mixture components of the general formula (I): ##STR1## wherein n=6 to 1... | 12/10/1991 |
| 4988459 | Use of optically active oxirane-2-carboxylic acid esters as dopants in liquid-crystal mixtures, liquid-crystal mixtures containing same and novel optically active oxirane-2-carboxylic acid esters Optically active oxirane-2-carboxylic acid esters with a mesogenic molecular component suitable as dopants in liquid-crystal mixtures. They result in liquid-crystalline ferroelectric phases with short switching times and in electroclinic phases with large... | 01/29/1991 |
| 4927244 | Use of compounds or mixtures of compounds which have a chiral, orthogonal, more highly ordered smectic phase in the range of said phase as switching or indicating medium Use of compounds or mixtures of compounds which have a chiral, orthogonal, more highly ordered smectic phase in the range of said phase as switching or indicating medium. Compounds which have a chiral, orthogonal, more highly ordered smectic phase, in par... | 05/22/1990 |
| 4906401 | Use of liquid-crystal 5-phenylpyrimidine derivatives as components of smectic liquid-crystal mixtures The compounds of the general formula (I) ##STR1## are particularly highly suitable as components of smectic, liquid-crystal mixtures, the symbols having the following meaning: R1 and R2 denote identical or different, straight-ch... | 03/06/1990 |
| 4906752 | Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* phases and a process for preparing them Liquid-crystal 5-phenylpyrmidine derivatives having Sc or S.sup.*c phases and a process for preparing them. The new liquid-crystal 5-phenylpyrimidine derivatives have an Sc or S.sup.*c phase and are described by... | 03/06/1990 |
| 4891151 | Liquid-crystalline phenylpyrimidinyl cyclohexanecarboxylates having a smectic phase, a process for their preparation, and their use in liquid-crystal mixtures Liquid-crystalline phenylpyrimidinyl cyclohexanecarboxylates having a smectic phase, a process for their preparation, and their use in liquid-crystal mixtures The phenylpyrimidinyl trans-cyclohexanecarboxylates of the general formula ##STR1## fo... | 01/02/1990 |
