| 摘要 |
PURPOSE:To optimize the angle with a substrate in correspondence to the kind of a liquid crystal and the helix angle of the liquid crystal and to improve the contrast of a liquid crystal display body to an optimum state by applying a soln. prepd. by dissolving specific two kinds of diamines and tetracarboxylic anhydride on the substrate with transparent electrodes, then subjecting the coating to drying, calcining and rubbing treatments. CONSTITUTION:The soln. prepd. by dissolving the diamine compd. exhibiting the constitutional formula expressed by formula I, other diamine compd. and the tetracarboxylic anhydride is applied on the substrate and thereafter, the coating is subjected to the drying and calcining, then to the rubbing. In the formula I, R denotes hydrogen or alkyl group. Since the oriented film consists of a polyimide resin, the film has the excellent heat resistance which is the characteristic of the polyimide. The angle of the liquid crystal molecules with the substrate can be changed as desired from 0 to 5 deg. up to 22 deg. by changing the mixing ratio of the diamine compd. of the two components and the need for preparing orienting agents to meet with the kind, helix angle, etc., of the liquid crystal is eliminated. Dealing with all cases is possible in this way by preparing two kinds of the diamines and the tetracarboxylic anhydride. |
