We investigated a viewing angle control of a liquid crystal display (LCD) under optical compensation for the enhancement of viewing angle characteristics in a wide viewing angle mode. The viewing angle controllable (VAC) LCD was operated in the configuration of three terminal electrodes consisting of a fringe-field-switching electrode at a bottom substrate and a common electrode at a top substrate. Using Poincaré sphere analysis, the optical compensation for the VAC LCD was designed so that the viewing angle characteristics were much improved in the wide viewing mode while they were degraded in the narrow viewing mode.
We proposed a surface treatment technology for improving the performance of the liquid crystal displays (LCDs). The
alignment surfaces are modified with the reactive mesogen (RM) which are mixed with alignment layers and
directionally polymerized along the LC directors during UV curing process. Since the polymerized RMs within the
alignment layers could control and memorize the specific pretilt and azimuthal angles of liquid crystal molecules at the
specific panel region, we could improve the display performance such as response time and wide viewing angle with
multi-domains and design the new LC modes.
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