| 摘要 |
PROBLEM TO BE SOLVED: To uniformly arrange molecules of an antiferroelectric liq. crystal over a large area and to ensure superior characteristics by forming each orientation controlling film with a specified polyimide film. SOLUTION: When an antiferroelectric liq. crystal is sealed in the space between electrode substrates to obtain a liq. crystal cell, an orientation controlling film is formed on each of the substrates with a film of polyimide represented by formula I, wherein X1 is 4,4'-diaminoterphenyl represented by formula II and Y1 is a tetravalent residue of carboxylic acid represented by formula III, IV, etc. Since the orientation controlling film is used, the initial oriented state of the antiferroelectric liq. crystal can be improved and the objective liq. crystal cell uniformly arranging liq. crystal molecule over a large area is obtd. The antiferroelectirc liq. crystal can be allowed to well exhibit its superior electro-optical effect. |
