Dynamic stability of the fringe-field switching liquid crystal cell depending on dielectric anisotropy of a liquid crystal

A voltage-dependent transmittance curve of the fringe-field switching (FFS) mode was studied with varying dielectric anisotropy of a liquid crystal (LC). The results show that for the LC with positive dielectric anisotropy the disclination lines existing between domains extend into the active region with increasing voltage over the operating voltage, whereas their width becomes smaller with increasing voltage for the LC with negative dielectric anisotropy. This indicates that the LC with negative dielectric anisotropy shows strong dynamic stability in the FFS mode, which can be a great advantage when fabricating microdisplays.