Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Hitachi, Ltd.

Merck Patent Gesellschaft

The Secretary of State for Defence in Her Britannic Majesty's Government

Toshiba Corporation

Merck Patent Gesellschaft MIT Beschr&auml;nkter Haftung

Merck Kgaa

The Secretary of State for Defence in Her Majesty's Government of the

Bescrankter Haftung

Georg Weber

Joachim Krause

Bernhard Scheuble

Rudolf Eidenschink

Volker Reiffenrath

Reinhard Hittich

Herbert Plach

Ludwig Pohl

Eike Poetsch

Andreas Wachtler

Michael Romer

Hans A Kurmeier

Ekkehard Bartmann

Bernhard Rieger

Takamasa Oyama

Thomas Geelhaar

Detlef Pauluth

Ulrich Finkenzeller

George W Gray

Kenneth J Toyne

Hiroki Yoshitake

Ian Charles Sage

Hans-Adolf Kurmeier

Gunther Haas

David Lacey

David Coates

Harald Hirschmann

Simon Greenfield

Klaus P Stahl

Dieter Dorsch

Matthias Bremer

Shinji Hasegawa

Hiroshi Numata

Kazuhisa Toriyama

Klaus Bofinger

Akihiro Kojima

Fernando Del Pino

Atsushi Sawada

Bernard Scheuble

Kazuaki Tarumi

Michael Junge

Franz-Heinrich Kreuzer

Michael Hird

Hideo Ichinose

Ursula Patwal

Shoichi Matsumoto

Adam Jackson

Dietrich Erdmann

Gunter Baur

Richard M Scrowston

Clarissa Weller

Axel Pausch

Ralf Steinstrasser

Jurgen Eichler

Wolfgang Sucrow

Hans-Michael Kompter

Dagmar Zimmermann

Kazuo Totani

Hitoshi Tomii

Martina Schmidt

Michael K Chambers

Kiyohiko Kawamoto

Bernd Scheuble

Peter Geschwinder

Wendy E Smith

Julie E Fearon

Rudolf Fidenschink

Michael Kevin Chambers

Michael P Burrow

Joachim Ruger

Klaus-Peter Stahl

Atsusi Sawada

Ralf Streinstrasser

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

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: 

Supertwist liquid-crystal displays and liquid-crystal mixtures therefor

TN and STN liquid crystal displays

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

Dopants

The invention relates to TN liquid-crystal displays and supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependences, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished by the fact that they comprise at least one compound o the formula IA ##STR1## and at least one compound of the formula IB ##STR2## in which R.sup.a, R.sup.b, R.sup.c, Ring A*, L, l and r are as defined in claim 1.

TN and STN liquid-crystal display

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 R, A.sup.1, A.sup.2, Z.sup.1, Z.sup.2, X, L and m are as defined in Claim 1.

Benzene derivatives, and liquid-crystalline medium

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 independently of one another are each R and R is alkyl having 1-12 C atoms, wherein one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, --CH.dbd.CH--, --CO--, --O--CO-- or --CO--O--, and up to four other components.

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

Chiral benzene derivatives of formula I ##STR1## in which R.sup.1*, R.sup.2*, X.sup.1, X.sup.2, A.sup.1, A.sup.2, Z.sup.1, Z.sup.2, L.sup.1, L.sup.2, L.sup.3, m, n and k are as defined in claim 1, and their use as chiral dopes in liquid-crystalline media, particularly for electrooptical displays, and to electrooptical displays containing such media.

Chiral dopes

Growing community of inventors

Erzhausen, Germany

Georg Weber