| 摘要 |
PURPOSE:To obtain a high contrast by providing at least one layer of a cholesteric polymer film between a nematic liq. crystal and a polarizing plate. CONSTITUTION:The torsion of the molecule of a liq. crystal cell 133 is controlled to an angle of 200 deg. to the left, and the DELTAnd is adjusted to about 0.9mum. The molar ratio m/n of a cholesteric polymer film 132 is controlled to 80. The angle between the polarization axis direction of an upper polarizing plate 131 and the molecule arrangement direction on the uppermost face of the film 132 is adjusted to about 40 deg., the angle between the molecule arrangement direction on the lowermost face of the film 132 and the rubbing direction of an upper electrode substrate of the cell 133 to about 90 deg., and the angle between the rubbing direction of a lower electrode substrate of the cell 133 and the polarization axis of a lower polarizing plate 134 to about 40 deg.. By this method, a high contrast can be obtained. |
