Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschrankter Haftung

Zbd Displays Limited

Stephen M Beldon

John Clifford Jones

Matthew Francis

Peer Kirsch

Mark John Goulding

Marc John Goulding

This invention relates to a liquid crystal device with grey scale. The invention uses dither, either spatial or temporal. For spatial dither the invention arranges so that at least one bit of dither is not a multiple of the size of a smaller bit of dither&#x2014;in other words there is a fractional weighting. The two bits of dither have the same number of addressable transmission levels and the weighting sacrifices some linearity in exchange for reduction of manufacturing tolerances for the smaller bit. For temporal dither the invention relates to fractional weighting of the duration of the sub-frames.

Liquid crystal devices with greyscale

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 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

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Ledbury, United Kingdom

Stephen M Beldon