The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2007
Filed:
Nov. 19, 2003
Matthew Francis, Chandlers Ford, GB;
Marc John Goulding, Hampshire, GB;
John Clifford Jones, Leighsinton, GB;
Steve Beldon, Herefordshire, GB;
Matthew Francis, Chandlers Ford, GB;
Marc John Goulding, Hampshire, GB;
John Clifford Jones, Leighsinton, GB;
Steve Beldon, Herefordshire, GB;
Merck Patent GmbH, Darmstadt, DE;
Abstract
The invention is directed to the use of a fast switching liquid crystal composition said composition comprising at least 30 weight % of a component (α) containing one or more compounds having a dielectric anisotropy Δε of at least 25, whereby at least 25 weight % of said compounds have a dielectric anisotropy Δε of at least 40; and at least 5 weight % of a component (δ) containing one or more compounds having a ratio of γ/Tof 0.51 mPa·s/K or less, a clearing point Tof at least 100° C. and a rotational viscosity γof not more than 190 mPa·s (wherein γis the rotational viscosity at 20° C. in mPa·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.