US 4,721,367 A · Liquid crystal device

Abstract

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.

Claims28

Dependent claims

A liquid crystal device comprising a cell structure including a pair of base plates and a liquid crystal compound represented by the formula (I) shown below or liquid crystal composition containing the compound and interposed between the pair of base plates;

said liquid crystal compound or composition being in a smectic phase formed through a phase transition from a higher temperature phase, a face of at least one of said 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:
formula (I) ##STR99## 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.

1 more element

Dependencies are inferred from the claim text.

Liquid crystal device

Life of this patent

Liquid crystal device

Life of this patent

Abstract

Claims28