Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gesellschaft

Matthew Francis

John Clifford Jones

Marc John Goulding

Mark John Goulding

Stephen M Beldon

Steve Beldon

Peer Kirsch

Owain Llyr Parri

Louise Diane Farrand

Kevin Adlem

Richard Harding

Shirley Ann Marden

Juliane Suermann

Cecile Schott

Donald Gordon Graham

Doina Ionescu

Robert Harding

The invention is directed to liquid crystal compositions for use in bistable liquid crystal devices and to bistable liquid crystal devices containing said liquid crystal compositions. The liquid crystal composition comprises a component (&#x3c0;) said component (&#x3c0;) containing one or more compounds having a phenyl ring of formula A Whereby Xis F, CI, SF, NCS or a Cto Calkanyl, alkenyl or alkoxy radical substituted with at least one F atom; and Lis H or F. 

Liquid crystal composition for bistable liquid crystal devices

The invention relates to a liquid crystal (LC) material that aligns homeotropically on substrates with high or low surface energy.

LC material with homeotropic alignment

The invention reports on the use of multi-reactive polymerizable surfactants in mixtures of polymerizable mesogenic materials. The polymerizable surfactants are readily polymerized into the liquid crystal film and build a protective topcoat layer. The invention also relates to a method of producing polymeric optical films with improved stability by using the surfactants. Uses of these films are given for various applications including security applications and displays.

Liquid crystal polymer film with improved stability

The invention relates to a liquid crystal medium with a highly twisted structure, to the use of said medium for optoelectronic applications in the fields of non-linear optics (NLO) and laser optics and to electrooptic devices, displays and lasers containing said medium.

Liquid crystal medium and liquid crystal display with a highly twisted structure

The invention is directed to the use of a liquid crystal composition in a bistable liquid crystal device and especially in a single polariser reflective or transflective zenithal bistable nematic liquid crystal device as well as a bistable liquid crystal device comprising the liquid crystal composition.

Liquid crystal composition for use in bistable liquid crystal devices

The invention is directed to the use of a liquid crystal composition in a bistable liquid crystal device and especially in a zenithal bistable nematic liquid crystal device, a nematic liquid crystal medium, and a bistable liquid crystal device comprising the liquid crystal composition whereby said liquid crystal composition comprises at least 30 weight % (based on the total weight of the composition) of a component (&#x3b1;) containing one or more compounds having a dielectric anisotropy &#x394;&#x3b5; of at least 25, whereby at least 25 weight % (based on the total weight of the composition) of said compounds have a dielectric anisotropy &#x394;&#x3b5; of at least 40; and at least 5 weight % of a component (&#x3b2;).

The invention is directed to the use of a fast switching liquid crystal composition said composition comprising at least 30 weight % of a component (&#x3b1;) containing one or more compounds having a dielectric anisotropy &#x394;&#x3b5; of at least 25, whereby at least 25 weight % of said compounds have a dielectric anisotropy &#x394;&#x3b5; of at least 40; and at least 5 weight % of a component (&#x3b4;) containing one or more compounds having a ratio of &#x3b3;/Tof 0.51 mPa&#xb7;s/K or less, a clearing point Tof at least 100&#xb0; C. and a rotational viscosity &#x3b3;of not more than 190 mPa&#xb7;s (wherein &#x3b3;is the rotational viscosity at 20&#xb0; C. in mPa&#xb7;s and Tis the clearing point in degrees Kelvin); in a bistable liquid crystal device and especially in a zenithal bistable nematic liquid crystal device, a nematic liquid crystal medium, and a bistable liquid crystal device comprising said fast switching liquid crystal composition.

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Chandlers Ford, United Kingdom

Matthew Francis