How the initial tilt angle of the director of a dual-frequency liquid crystal affects the electrooptic characteristics of cells

摘要

This paper discusses cells filled with a dual-frequency nematic liquid crystal (DNLC) in which the initial tilt angle0_p of the director was varied in the interval from 40 to 75 by varying the surface relief of the orienting layers. The experimental dependences of the time to change the phase lag by 2 at a wavelength of 0:65 μm on angle 0_p for longitudinal and transverse deformation of the DNLC layer have been obtained for the first time. It is shown that transverse elastic deformation is a slower process than longitudinal elastic deformation. The ON or OFF time of the cells as a result of the process of longitudinal elastic deformation occupied 1-2 ms when a field is applied with frequency 1 kHz, and was 3-9 ms for transverse deformation by applying an electric field with frequency 30 kHz.