LIQUID CRYSTAL ELECTROOPTIC DEVICE

摘要

PURPOSE:To embody a change in transmittance to make display by using a liquid crystal which exhibits a ferroelectric characteristic, unraveling a spiral state by an electric field impressed to a cell and controlling the angle at which liquid crystal molecules incline by the positive and negative of the electric field and the impression time. CONSTITUTION:A spacing between substrates 2 is specified to about 10mum. Uniaxial orientational property to the liquid crystal is imparted to an oriented film 4 on one substrate by subjecting the film to a treatment. The ferroelectric liquid crystal of an ester system is injected into the cell. The liquid crystal has the angle theta of inclination of + or -19 deg. with the spiral axis in a temp. region where the ferroelectric characteristic is exhibited. The spiral pitch is 1.8mum. The polarization of a polarizing plate 1 is set at 19 deg. and a polarizing plate 7 is installed in the direction perpendicular to the plate 1. A diode 12 of in structure is sandwiched by thin Mo films 9 and 10 for light shielding and is isolated by a transparent insulator 8. The polarization direction of the plate 1 and the major axis direction of the liquid crystal molecules coincide with each other and light is not transmitted when a voltage is impressed on the electrodes 3, 9. The molecules are decreased in the voltage with the discharge by leakage and the state of transmitting the light is attained when the electric field is inverted.