3A14 4×4マトリックス法によるV字型反転挙動を示す液晶のモデル構造の検討

抄録

It was found that, during the V-shaped switching, LC molecules in very thin cell such as 2μm rotate on a cone collectively and the projection of molecular long axis to substrates is parallel to the layer normal at zero field. In the thicker cells, however, the twisted state was observed. In particular the molecules in the vicinity of surfaces may deviate from the layer normal because of the polar interaction and the rubbing effect. Based on the above consideration, we suggested that LC molecules achieve the uniform orientation at least in the bulk because of polarization charge. In order to examine the existence of the uniform orientation in collective model at zero feild, transmittance spectra were calculated using the 4×4 matrix method. In this result, twist region in very thin cells such as 2μm must be confined only 50nm at both surfaces.