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Inventor:
Kurmeier; Hans A.
Address:
Seeheim-Jugenheim, DE
No. of patents:
15
Patents:












Patent Number Title Of Patent Date Issued
5536442 Fluorinated liquid crystal compounds and liquid crystal medium containing same July 16, 1996
The invention relates to liquid crystal compounds having a terminal structure in accordance with formula 1, 2, 3 or 4:wherein A.sup.2, A.sup.3, X.sup.1 and X.sup.2 and are defined herein. The invention further relates liquid crystal phases containing the above components as well as elect
5496499 Biphenylethanes and liquid-crystalline phase March 5, 1996
Biphenylylethanes of the formula I ##STR1## in which one of the radicals R.sup.1 and R.sup.2 is X and the other radical R.sup.1 or R.sup.2 is R--Y-- whereX is H, halogen, --CF.sub.3, --OCHF.sub.2, --OCF.sub.3, --CN, --NCS or --NO.sub.2,R is alkyl, fluoroalkyl, alkenyl or oxaalkyl and
5487845 Fluorobenzene derivatives and liquid-crystalline medium January 30, 1996
Fluorobenzene derivatives of the formula I, ##STR1## R, A1, A2, S1, 22, L, m, Y, Q are as defined herein.
5397505 Liquid crystalline medium March 14, 1995
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I ##STR1## in which r is o or 1, Q.sup.1 is --CH.sub.2 CH.sub.2 -- or a sin
5389292 Difluoromethyl compounds February 14, 1995
Compounds of the formula Iin which R, A.sup.1, Z.sup.1, m, A.sup.2 and Q have the meaning given in Patent Claim 1 are suitable as components of liquid-crystalline media.
5389289 Liquid-crystalline medium February 14, 1995
The invention relates to a liquid-crystalline medium essentially comprisinga) 5-65% by weight of a component A, comprising two or more compounds selected from group A: ##STR1## b) 20-95% by weight of a component B comprising two or more compounds selected from group B: ##STR2##
5387369 Supertwist liquid crystal display February 7, 1995
Supertwist liquid crystal displays having very short switching times are obtained if the nematic liquid crystal mixture contains at least one component chosen from group A consisting of compounds of the formulae AI to AVI: ##STR1## wherein R.sup.1 and R.sup.2 in each case indepen
5378395 Matrix liquid crystal display January 3, 1995
The invention relates to a matrix liquid crystal display containing integrated non-linear elements and a liquid crystal mixture which has a particularly high resistivity.
5348677 Electro-optical liquid crystal display element September 20, 1994
The invention relates to an electro-optical liquid crystal display element containing a dielectric with at least two liquid-crystalline components, wherein the dielectric, for shortening the switching times, contains at least one fluorine-containing compound of the formula Iwherein the r
5292454 Trifluorotoluene compounds, and a liquid crystalline medium March 8, 1994
Trifluorotoluene compounds of the formula I ##STR1## in which n is 1 to 12, and Q is ##STR2## are suitable as components of liquid-crystalline media.
5286411 Liquid-crystalline medium February 15, 1994
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I ##STR1## in which L is H or F, X is F, Cl, CF.sub.3, OCF.sub.3 or OCHF.sub.2,
5164114 Ethyne derivatives November 17, 1992
Ethyne derivatives of the formula Iwherein R.sup.1, A.sup.1, Z.sup.1, m, A.sup.3, A.sup.4, .sub.2 Z.sup.2 and n have the meaning given in Claim 1 and R.sup.2 is --OCF.sub.3, --OC.sub.2 F.sub.4 H or --OC.sub.2 F.sub.5, are suitable as components of liquid crystal phases.
4911863 Alkylbyphenyloxyacetic acid esters and their use in smectic liquid crystal materials March 27, 1990
The invention relates to ferroelectric smectic liquid crystal mixtures and compounds. The invention also relates to electro-optical devices incorporating these mixtures.
4846998 Cyclohexane derivatives July 11, 1989
Cyclohexane derivatives of the formula Iin whichR.sup.1 and R.sup.2 are each an alkyl group having 1-10 C atoms, in which one or two non-adjacent CH.sub.2 groups can also be replaced by O atoms and/or --CO-- groups and/or --CO--O-- groups and/or --CH.dbd.CH-- groups, one of the radicals
4699636 Process for outgassing liquid-crystalline materials October 13, 1987
Liquid-crystalline materials can be outgassed by thermal treatment under reduced pressure in a thin-layer evaporator or with additional ultrasonic treatment.










 
 
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