Merck Patent Gesellschaft MIT Beschrankter Haftung

Sharp Corporation

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Bescrankter Haftung

Thomas Geelhaar

Volker Reiffenrath

Joachim Krause

Andreas Wachtler

Eike Poetsch

Reinhard Hittich

Georg Weber

Bernhard Scheuble

Rudolf Eidenschink

David Coates

Herbert Plach

Bernhard Rieger

Ekkehard Bartmann

Ulrich Finkenzeller

Reinhard Hopf

Ian Charles Sage

Detlef Pauluth

Simon Greenfield

Hans-Adolf Kurmeier

Klaus Bofinger

Fumiaki Funada

George W Gray

Kenneth J Toyne

David Lacey

Shuichi Kohzaki

Hiroshi Numata

Kei Sasaki

Masako Okada

Hans-Michael Kompter

Michael Hird

Werner Binder

Adam Jackson

Richard M Scrowston

Michael Kompter

Axel Pausch

Liquid-crystalline compounds of the formula I ##STR1## R is H, an alkyl or alkylene radical, Z.sup.1 and Z are each, independently of one another, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--,--C.tbd.C-- or a single bond, and one of the radicals Z.sup.1 and Z is alternatively --(CH.sub.2).sub.4 -- or --CH.dbd.CH--CH.sub.2 CH.sub.2 --,

Liquid-crystalline compounds

Benzene derivatives of the formula I ##STR1## in which n is 1 to 7, Q is --CO or --(CH.sub.2).sub.r -- where r is 1 to 5, s is 0, 1 or 2, t is 0 or 1, where s+t.gtoreq.1, X is F, Cl, --CF.sub.3, --CN, --OCF.sub.3 or --OCHF.sub.2, and Y, L and Z are each, independently of one another, H or F.

Benzene derivatives, and a liquid-crystalline medium

A nematic liquid crystalline medium having at least two liquid crystalline components with at least one being of formula I ##STR1## wherein R is H, a straight-chain alkyl or alkenyl radical having 1 to 15 carbon atoms, it also being possible to replace one or more CH.sub.2 groups in these radicals, independently of one another, by --O--, --S--, ##STR2## --CO--, --CO--O--, --O--CO-- or --O--CO--O-- in such a way that oxygen atoms are not linked directly to one another,

The invention relates to the use of chiral and/or achiral compounds, containing at least one structural element from the group comprising

Media containing thiazole derivatives and thiadiazole derivatives and

The invention relates to optically active compounds of the formula I ##STR1## in which R is an alkyl or alkenyl radical having up to 15 carbon atoms which is unsubstituted, monosubstituted by --CN or at least monosubstituted by fluorine or chlorine, it also being possible for a CH.sub.2 group in these radicals to be replaced by --O--, --CO--, --O--CO--, --CO--O-- or --O--CO--O--,

Optically active compounds, and a liquid-crystalline phase

3,6-disubstituted 2-halopyridines

Benzene derivatives of the formula I ##STR1## in which n is 1 to 7, Q is --CO or --(CH.sub.2).sub.r --, where r is 1 to 5, s is 0, 1 or 2, t is 0 or 1, where s+t.gtoreq.1, X is F, Cl, --CF.sub.3, --CN, --OCF.sub.3 or --OCHF.sub.2, and Y, L and Z are each, independently of one another, H or F.

Benzene derivatives, and a liquid crystal medium

Optically active nitrogen-containing heterocycles of the formula I according to claim 1 are suitable as components for ferroelectric liquid crystalline materials.

Nitrogen-containing heterocycles

The invention relates to a matrix liquid-crystal display based on the principle of electrically controlled birefringence, having

Matrix liquid-crystal display

Methylenecyclobutane derivatives

The invention relates to fluorophenylpyrimidines of the formula I: ##STR1## where R.sup.1, R.sup.2, A.sup.1,A.sup.2, Q.sup.1, Q.sup.2 and n have the meaning specified in patent claim 1, and to their use as components of liquid-crystalline, in particular ferroelectric, media.

Fluorophenylpyrimidines

The invention relates to a nematic liquid-crystal composition for active matrix displays with high voltage holding ratio and extremely good low temperature stability.

Nematic liquid-crystal composition for active matrix application

The invention relates to the use of trifluorotoluene derivatives of the formula I ##STR1## in which R.sup.1 is alkyl having 1 to 12 carbon atoms in which, in addition, one or more non-neighboring CH.sub.2 groups may be replaced by --O--, --CO--, --O--CO--, --CO--O--, --O--CO--O--, --CH-halogen, --CH--CN-- and/or --CH.dbd.CH--,

Nematic liquid-crystalline phases

The invention relates to ferroelectric liquid-crystal displays having improved multiplexing capability.

Ferroelectric liquid-crystal display

Growing community of inventors

Mainz, Germany

Thomas Geelhaar