The dependence of director orientation of newatic liquid crystals on electric field;

From the theory of Oseen-Frank, using finite difference and over-relaxation method, the numerical model of multi-dimensional liquid crystal director deformation profile is introduced, and the flow chart of the program is given The program has the features of quick speed, stability and high-accuracy, and it is suitable for solving any complicated liquid crystal structure.

Based on the continuous elastomer theory,director equations are analyzed by comparing advantages and disadvantages of Newton method,simulated annealing and iterative algorithm.

Rectangular director domains were set up,which are bounded by "virtual surfaces" with a finite anchoring energy.

This paper reviews the progress in the photo-induced molecular reorientation in dye-doped nema-(tic) liquid crystals, presents the current experimental background and theoretical explanations pertinent to the optical reorientation in doped liquid crystals, and discusses the effects of the photoisome-(rization) on the photo-induced molecular reorientation in the azo-dye doped liquid crystals.