Effect of azimuthal anchoring strength on stability in a bistable chiral splay nematic liquid crystal device

Abstract

The stabilization of the metastable 180 degrees twist state in a bistable chiral splay nematic liquid crystal device is studied. The stability of the metastable 180 degrees twist state is explained using the azimuthal anchoring strength, which is a function of the twist elastic constant and the cell gap. A stable 180 degrees twist state as well as the permanent retention time can be obtained by increasing the anchoring energy above a certain threshold.

Experimental Determination of Elastic and Viscous Parameters of Liquid Crystals

“…A number of newly developed LC displays, for example, bistable nematic displays [139,147], are based on the breaking of weak anchoring under the action of strong electric fields. The operation of these devices fully depends on the dynamic behavior of near-surface layers of liquid crystals.…”

Flexible bistable chiral nematic liquid crystal display with enhanced memory characteristic by surface treatment

“…Especially, the memory mode of the BCSN‐LC display has considerable significance in the mobile display devices for displaying textures and/or still images because of its low power consumption. However, the memory retention time in the memory mode, governed by the stability of the π‐twisted LC arrangement, is still limited despite various efforts such as the multidimensional alignment method . Moreover, in the BCSN‐LC mode for flexible applications, the memory characteristics might be readily degraded under external deformation.…”

“…However, the memory retention time in the memory mode, governed by the stability of the p-twisted LC arrangement, is still limited despite various efforts such as the multidimensional alignment method. [6][7][8] Moreover, in the BCSN-LC mode for flexible applications, the memory characteristics might be readily degraded under external deformation.…”

P‐133: Enhancement of Memory Characteristics in Bistable Chiral Splay Nematic Display Mode

“…In the memory mode of the BCSN configuration, where splay and -twisted configurations exhibit dark and bright states, respectively, the memory retention time is limited by the stability of -twisted LCs arrangement [8]. The multidimensional alignment method was attempted to increase the -twisted alignment state corresponding to the memory retention time of BCSN-LC mode [9,10].…”