Investigation of Electrohydrodynamics Phenomenon of Nematic Liquid Crystals on The Parallelepiped Longitudinal-View Cells

The electrohydrodynamics phenomenon of nematic liquid crystals in parallelepiped sandwich cells has been successfully investigated. The results show hierarchical patterns include the Williams Domain (WD), which moves uniformly from the edge to the center of the cell (called translational flow)─fluctuating Williams Domain (FWD)─grid pattern (GP)─dynamic scattering mode (DSM). The phase diagram shows that the threshold voltage of each pattern increases exponentially with frequency. It correlates with the electrohydrodynamic phenomenon in the low-frequency region. The translational flow velocity in the Y-segment has also been calculated. It shows random values in the range of 0.04─0.1 micrometer per second.