摘要:
The present invention relates to liquid-crystal mixtures having specific resistance values, comprising acidic compounds. The present invention furthermore relates to liquid-crystal displays containing these liquid-crystal mixtures. The invention furthermore relates to compounds of the formula I, in which the parameters are as defined in the text, to their preparation, and to their use for achieving certain specific resistance values in liquid-crystal mixtures. The application also relates to a method of adjusting the specific resistance of liquid-crystal mixtures using acidic compounds.
摘要:
The present invention relates to liquid-crystal mixtures having specific resistance values, comprising acidic compounds. The present invention furthermore relates to liquid-crystal displays containing these liquid-crystal mixtures. The invention furthermore relates to compounds of the formula I, ##STR1## in which the parameters are as defined in the text, to their preparation, and to their use for achieving certain specific resistance values in liquid-crystal mixtures. The application also relates to a method of adjusting the specific resistance of liquid-crystal mixtures using acidic compounds.
摘要:
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which medium comprises one or more compounds the general formula Ia and one or more compounds selected from the group consisting of compounds of the formula III and V to VIII: The notations r, R, R0, X0, Z0 and Y1-4 are defined herein.
摘要:
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R, Y, Z and n are as defined in claim 1.
摘要:
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I and at least one compound of the formula in which the substituents are as defined in claim 1.
摘要:
A liquid-crystalline medium containing a mixture of polar compounds of positive dielectric anisotropy. The mixture contains one or more compounds of formula I in which: R is H, an alkyl or alkenyl radical having 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where one or more CH2 groups in these radicals are optionally, in each case independently of one another, replaced by —O—, —S—, —CO—, —CO—O—, —O—CO— or —O—CO—O in such a way that O atoms are not linked directly to one another; is a trans-1,4-cyclohexylene ring, in which one or two CH2 groups are optionally replaced by —O— and/or —S—, or a cyclohexenylene ring; Y is halogenated alkyl, halogenated alkenyl, halogenated alkoxy or halogenated alkenyloxy having 1 to 6 carbon atoms; Z is —OCH2—, —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —C2F4— or a single bond; and n is 1 or 2. And the mixture contains one or more dioxane compounds of the following formula wherein R0 is n-alkyl, oxoalkyl, fluoroalkyl or alkenyl, in each case having 1 to 7 carbon atoms; and X0 is F, Cl, halogenated alkyl, alkenyl or alkoxy having 1 to 6 carbon atoms.
摘要:
A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which medium exhibits a birefringence value of ≦0.065 and includes one or more compounds of formula Ia and at least one compound of the formula Xc or Xd: in which R, alkyl, alkenyl and alkenyl* are as defined in claim 1.
摘要:
A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which contains: one or more compounds of the general formula I in which R, Y, Z and n are as defined in claim 1, one or more compounds of the following formulae IIa, IIb, IIc and IId and one or more compounds of the formula in which Ro, Xo, Y2 and r are as defined in claim 1.
摘要:
A liquid-crystalline medium having a mixture of polar compounds of positive dielectric anisotropy is described. It contains one or more compounds of formula I and one or more ester compounds of the formulae E2, E3 or E4
摘要:
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R, Y, Z and n are as defined in claim 1.