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Phenomenological Analysis in Fabricating Defect-Free Ferroelectric Liquid Crystal Displays with C-l or C-2 Uniform States

The most important issue in developing liquid crystal displays (LCDs) utilizing ferroelectric liquid crystals (FLCs) is how to obtain defect-free FLCDs. In this report, a phenomenological theory of transition between C-1 and C-2 states in FLC cells is suggested. Free energy that includes bulk elastic and surface parts has been theoretically simulated depending on parameters such as surface topography, anchoring energies, thickness of the LC medium and so forth. The critical conditions of the state transition from C-1 to C-2 have been determined. Based on this theory, we succeeded in fabricating defect-free FLCDs with uniform C-2 states by rubbing and that with uniform C-1 states by the photoalignment technique.