摘要:
A liquid crystal device is constituted by (a) a pair of base plates each having an orientation control film thereon, and (b) a liquid crystal composition interposed between the base plates. The liquid crystal composition comprises a mixture including at least one liquid crystal compound which has a temperature range in which it shows chiral smectic phase and at least one optically active substance which does not have a temperature range in which it shows chiral smectic phase. The liquid crystal composition has a temperature range in which it shows cholesteric phase and is placed in chiral smectic phase which has been formed through cholesteric phase on temperature decrease. The liquid crystal composition comprises liquid crystal molecules having long axes forming a pre-tilt in the chiral smectic phase.
摘要:
A liquid crystal device is constituted by (a) a pair of base plates each having an orientation control film thereon, and (b) a liquid crystal composition interposed between the base plates. The liquid crystal composition comprises at least two liquid crystal compounds including at least one liquid crystal compound which has a temperature range in which it shows cholesteric phase. The liquid crystal composition has a temperature range in which it shows cholesteric phase and is placed in chiral smectic phase which has been formed through cholesteric phase on temperature decrease. The liquid crystal composition comprises liquid crystal molecules having long axes forming a pre-tilt in the chiral smectic phase.
摘要:
An optically active lactic acid derivative represented by the following formula (I): ##STR1## wherein R is a saturated or unsaturated hydrocarbon group of a linear, branched or cyclic structure having 4 to 20 carbon atoms; Ra is --CO--Rb or --CH.sub.2 --Rc wherein Rb is a releasable chemically active group, and Rc is a releasable chemically active group; and C with * represents an asymmetric carbon atom.
摘要:
4-Alkoxybenzenethiol, bis-(4-alkoxyphenyl)disulfide, and mesomorphic compound deviced therefrom represented by the formula: ##STR1## wherein R.sub.1 is an alkyl or alkoxy group having 1-18 carbon atoms, R* is an alkyl group having 4-12 carbon atoms including an asymmetric carbon atom, 1=1 or 2, and m=0 or 1.
摘要:
An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR1## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom; and an optically active compound derived from the fluoroalkanol and represented by the formula (Ib): ##STR2## wherein R and C* are the same as above, m is 1 or 2, n is 0 or 1, and A is a releasable substituent. Because of the fluorine atom directly attached to an asymmetric carbon atom, these compounds are particularly effective in increasing a spontaneous polarization, improving a electric field responsive characteristic of a liquid crystal composition, and controlling the liquid crystal state.
摘要:
A liquid crystal device comprising a pair of base plates and a liquid crystal composition interposed between the pair of base plates; the liquid crystal composition comprising a liquid crystal compound showing at least chiral smectic phase and a liquid crystal showing at least nematic phase and having a pyrimidine skeleton; a face of at least one of the pair of base plates having been provided with a function of preferentially orienting the axes of the liquid crystal molecules contacting the face in one direction.
摘要:
An optically active lactic acid derivative represented by the following formula (Ia) or (Ib): ##STR1## wherein R is a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 1-16 carbon atoms, R.sup.1 is an alkyl group having 4-16 carbon atoms, m and n are respectively 1 or 2, k is 0 or 1, and C* is an asymmetric carbon atom. A liquid crystal composition containing the lactic acid derivative and a liquid crystal device using the liquid crystal composition are also disclosed.
摘要:
An optically active lactic acid derivative represented by the following formula (I): ##STR1## wherein R is a saturated or unsaturated hydrocarbon group of a linear, branched or cyclic structure having 4 to 20 carbon atoms; Ra is --CO--Rb or --CH.sub.2 --Rc wherein Rb is a releasable chemically active group, and Rc is a releasable chemically active group; and C with * represents an asymmetric carbon atom.
摘要:
A liquid crystal compound represented by the formula (I) below or a liquid crystal composition containing the compound is interposed between a pair of base plates. ##STR1## wherein R is an alkyl or alkoxy group having 1-18 carbon atoms; m is 0 or 1; R.sup.1 is an alkyl group having 1 to 18 carbon atoms when m is 0 and is an alkyl or alkoxy group having 1-18 carbon atoms when m is 1. The liquid crystal compound or composition is in a chiral smectic phase formed through a phase transition from a higher temperature phase. At least one of the base plates has a face to which an orientation controlling function is imparted for preferentially orienting the liquid crystal molecules in contact with the face in one direction.
摘要:
A liquid crystal device comprising a pair of base plates and a liquid crystal composition interposed between the pair of base plates; the liquid crystal composition comprising a liquid crystal compound showing at least chiral smectic phase and a liquid crystal showing at least nematic phase; a face of at least one of the pair of base plates having been provided with a function of preferentially orienting the axes of the liquid crystal molecules contacting the face in one direction.