| 摘要 |
PURPOSE:To obtain good display characteristics by mixing colesteric or chiral nematic liquid crystals as optically active materials having right-hand and left- hand optically rotatory powers with nematic liquid crystals, thereby specifying the relations between the pitches of the liquid crystal material and the inter- substrate distance of cells. CONSTITUTION:A mixture of a right-hand optically active material and a left- hand otically active material is used for a base liquid crystal consisting of a nematic liquid crystal, and the relation dP/dt=dD/dt between the pitch P of the liquid crystal material and the inter-substrate distance D of the cell is satisfied, whereby the change of D/P with temp. is eliminated. Therefore, the value of D/P showing good display characteristics is maintained irrespectively of temps., and the phase transfer type color display having no memory effect and color irregularity is performed. |
