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Effect of the Surface Anchoring Energy on the Electro-Optical Properties in Monostable Ferroelectric Liquid Crystal Display

Nine series of polyimides (PIs) were used to examine the correlation between the surface energy of the alignment layer and electro-optical properties of the continuous director rotation (CDR) ferroelectric liquid crystal (FLC). We found that both driving voltage and response time for CDR FLC were reduced due to the weak interaction between FLC and PI, when the anchoring energy of the alignment layer was decreased. However, the contrast ratio for CDR FLC was reduced when the anchoring energy of the alignment layer was lowered. In addition, the electro-optical properties, such as voltage-transmittance characteristics, the response time, the contrast ratio, and the alignment states of the CDR FLC, are found to be strongly dependent upon the surface energy of the alignment layer.