Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gesellschaft MIT

Michael Kompter

Eike Poetsch

Kazuaki Tarumi

Andreas Beyer

Michael Schwarz

Ulrich Heywang

Axel Pausch

Inge Stein

Anja Huth

Volker Reiffenrath

Matthias Bremer

Brigitte Schuler

Andreas Wachtler

Joachim Krause

Herbert Plach

Bernhard Scheuble

Michael Junge

Ekkehard Bartmann

Thomas Geelhaar

Volker Meyer

Werner Binder

Alasdair Jelfs

Electro-optical liquid-crystal

The invention relates to an electro-optical liquid-crystal display having a realignment layer for realigning the liquid crystals whose field has a significant component parallel to the liquid-crystal layer and which contains a liquid-crystalline medium of positive dielectric anisotropy, where the medium comprises at least one mesogenic compound containing a 3,4,5-trifluorophenyl group and/or comprises at least one mesogenic compound [lacuna] a structural unit of the formula 2 ##STR1## in which A is O or CH,

Electro-optical liquid-crystal display

Electro-optical liquid crystal display

The use of a benzylidenenorcamphor compound of the formula I ##STR1## wherein Phe is a phenyl group which is unsubstituted or substituted by 1 to 5 hydroxyl, alkyl or alkoxy groups having 1 to 10 C atoms, and n is 1 or 2. as sunscreen filters, and also novel compounds of the formula I, their preparation and use as UV filters, in particular in cosmetic or pharmaceutical preparations.

Benzylidenenorcamphor derivatives

The invention relates to difluorovinyl ethers of the general formula I ##STR1## in which R, A, X and m are as defined in claim 1, and to the use of these compounds as components of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the novel liquid-crystalline media.

Difluorovinyl ethers

The invention relates to bis(methylidene)phenylene derivatives of the formula

Bis(methylidene)phenylene derivatives

A process for preparing substituted 4-methylidenecinnamic acid derivatives of Formula (I). ##STR1## The variables are defined herein. The compounds of Formula (I) can be used, for example, as UV absorbers.

Process for preparing substituted 4-methylidenecinnamic acid derivatives

A liquid-crystalline mixture comprising two or more compounds of the general formula I, ##STR1## in which R.sup.1 is straight-chain alkyl having 3, 5 or 7 carbon atoms, three or more compounds of the general formula II, ##STR2## in which R.sup.2 is straight-chain alkyl having 2 to 7 carbon atoms, three or more compounds of the general formula III, ##STR3## in which R.sup.3 and R.sup.4 are each independently alkyl or alkoxy with 1 to 10 carbon atoms, and two or more compounds of the general formula IV, ##STR4## in which R.sup.5 and R.sup.6 are each independently have one of the meanings indicated for R.sup.3 and m is 0 or 1. A 'multibottle-system' comprising said mixture and an electrooptical display device based on the principle of the twisted nematic cell.

Liquid-crystalline mixture

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

Ferroelectric liquid-crystal display

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Riedstadt, Germany

Michael Kompter