Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified...
Reexamination Certificate
2007-08-21
2007-08-21
Wu, Shean C (Department: 1756)
Stock material or miscellaneous articles
Liquid crystal optical display having layer of specified...
C428S001300, C252S299010, C252S299610, C252S299630, C252S299660, C252S299670, C349S167000, C349S182000
Reexamination Certificate
active
10538638
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 γ1/TNIKof 0.51 mPa·s/K or less, a clearing point TNIof at least 100° C. and a rotational viscosity γ1of not more than 190 mPa·s (wherein γ1is the rotational viscosity at 20° C. in mPa·s and TNIKis 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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Beldon Steve
Francis Matthew
Goulding Marc John
Jones John Clifford
Merck Patent GmbH
Millen White Zelano & Branigan P.C.
Wu Shean C
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