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Merck Patent Gesellschaft MIT Beschraenkter Haftung

Merck Kgaa

Merck Patent Gesellschaft

Reinhard Hittich

Herbert Plach

Eike Poetsch

Volker Reiffenrath

Bernhard Rieger

Bernhard Scheuble

Georg Weber

Joachim Krause

Andreas Wachtler

David Coates

Hans A Kurmeier

Ekkehard Bartmann

Thomas Geelhaar

Rudolf Eidenschink

Ludwig Pohl

Ulrich Finkenzeller

Takamasa Oyama

Simon Greenfield

Volker Meyer

Klaus P Stahl

Hans-Adolf Kurmeier

Detlef Pauluth

Reinhard Hopf

Hiroki Yoshitake

Graham Smith

Hans-Michael Kompter

Fumiaki Funada

Shuichi Kohzaki

Shirley Ann Marden

Hiroshi Numata

Stefan Wilhelm

Kei Sasaki

Masako Okada

Robert William Clemitson

Peter Fuss

Andreas W&auml;chtler

Dieter Dorsch

Sabine Schoen

Ian Charles Sage

Mark John Goulding

Michael Junge

Jurgen Seubert

Emma J Brown

David I Bishop

Wolfgang Sucrow

Stephen J Lewis

Michael K Chambers

Bernard Scheuble

Kiyohiko Kawamoto

Bernard Riefling

Peter Geschwinder

Michael Kevin Chambers

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.

Matrix liquid crystal display

Novel phenylcyclohexanes of the formula I in which n is 0 to 7, Qand Qare H, or one of these radicals is alternatively CH, r is 0, 1, 2, 3, 4 or 5, A is trans-1,4-cyclohexylene, 1,4-phenylene, 3-fluoro-1,4-phenylene or a single bond, X is F, Cl, &#x2014;CF, &#x2014;CN, &#x2014;OCFor &#x2014;OCHF, and Y and Z are each, independently of one another, H or F, with the proviso that, in the case where A is a single bond, Q=Q=H and simultaneously X=CN, Y and/or Z are F.

Phenylcyclohexanes and a liquid-crystalline medium

Described are matrix liquid crystal displays having two plane parallel support plates which together with a frame form a cell, integrated non-linear elements for switching individual picture elements on the support plates and a nematic liquid crystal mixture which is present in the cell and has a positive dielectric anisotropy and high resistivity. The liquid crystal mixture has a nematic phase range of at least 60&#xb0; C., a maximum viscosity at 20&#xb0; C. of 30 mPa&#xb7;s and a mean dielectricity constant &#x3b5;&#x2266;8. The liquid crystal mixture contains: a) at least 10% by weight of a liquid-crystalline component B having one or more compounds of the following formulae: and b) up to 90% by weight of a liquid-crystalline component A having one or more compounds with a dielectric anisotropy of &#x2212;1.5 to 1.5 of the formula I: 

Novel phenylcyclohexanes of the formula Iin which n is 0 to 7, Qand Qare H, or one of these radicals is alternatively CH, r is 0, 1, 2, 3, 4 or 5, A is trans-1,4-cyclohexylene, 1,4-phenylene, 3-fluoro-1,4-phenylene or a single bond, X is F, Cl, &#x2014;CF, &#x2014;CN, &#x2014;OCFor &#x2014;OCHF, and Y and Z are each, independently of one another, H or F, with the proviso that, in the case where A is a single bond, Q=Q=H and simultaneously X=CN, Y and/or Z are F.

Nematic liquid crystal mixtures and a matrix liquid crystal display

1,4-disubstituted 2,6-difluorobenzene compound of formula I

1,4-disubstituted 2,6-difluorobenzene compounds, and a liquid-crystalline medium

Novel phenylcyclohexanes of the formula I

Liquid crystal phases containing components of the formulae I and III

Liquid crystal phase

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:

Supertwist liquid crystal display

The invention relates to a nematic liquid crystal mixture having a positive dielectric anisotropy &Dgr;&egr; of at least &plus;4 and a birefringence &Dgr;n of at least 0.12, characterized in that the mixtures comprises one or more components having the core structure

The invention relates to a nematic liquid crystal mixture having a positive dielectric anisotropy .DELTA..epsilon. of at least +4 and a birefringence .DELTA.n of at least 0.12, characterized in that the mixtures comprises one or more components having the core structure ##STR1## wherein L.sup.1, L.sup.2, Y and Z are each independently of one another H or F, one of Q.sup.1 and Q.sup.2 is 1,4-phenylene, 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other residue Q.sup.1 or Q.sup.2 is --CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 -- or -- if at least one of L.sup.1, L.sup.2, Y and Z denotes F-- also a single bond, whereby this core structure can be optionally further fluorinated in the benzene rings.

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Modautal, Germany

Reinhard Hittich