Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gmbh

Sharp Corporation

Merck Kgaa

Takamasa Oyama

Bernhard Scheuble

Georg Weber

Herbert Plach

Reinhard Hittich

Hans A Kurmeier

Ludwig Pohl

Bernhard Rieger

Ekkehard Bartmann

Eike Poetsch

Hiroki Yoshitake

Klaus P Stahl

Volker Reiffenrath

Fumiaki Funada

Hans-Adolf Kurmeier

Shuichi Kohzaki

Masako Okada

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 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

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.

Supertwist liquid crystal displays having outstanding properties are obtained if the nematic liquid crystal mixture is based on components selected from group A comprising compounds of the formulae IIa to IIk: ##STR1##

The invention relates to nematic liquid-crystal compositions for active matrix displays with high voltage holding ratios.

Nematic liquid-crystal composition for active matrix application

Growing community of inventors

Fukami-nishi, Japan

Takamasa Oyama