Analysis of Electro-Optic Characteristics of Polymer-Stabilized Blue Phase Liquid Crystal Driven by In-Plane and Fringe Electric Field

Lowering threshold voltage and operating voltage is a critical issue for blue phase liquid crystal (BP LC) because the Kerr constant of liquid crystal mixture is not so high. In order to switch BP LC from optically isotropic to anisotropic state, in-plane electric field should be generated by interdigitated electrodes in general, however, the operating voltage is high and transmittance is relatively low. In this paper, the BP LC driven by fringe electric field is studied as one of the solutions for those problems. Detailed analysis of voltage-dependent characteristics between two devices has been performed.