Abstract:
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 nernatic liquid crystal device as well as a bistable liquid crystal device comprising the liquid crystal composition.
Abstract:
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 (α) containing one or more compounds having a dielectric anisotropy Δε of at least 25, whereby at least 25 weight% (based on the total weight of the composition) of said compounds have a dielectric anisotropy Δε of at least 40; and at least 5 weight% of a component (β).
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 1 /T NI K of 0.51 mPa-s/K or less, a clearing point T NI of at least 100°C and a rotational viscosity γ 1 of not more than 190 mPa-s (wherein γ 1 is the rotational viscosity at 20 °C in mPa-s and T NI K is 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.