Investigation of Response Time of Vertically Aligned In-Plane-Switching LCD Mode

摘要

The response time of the vertically aligned in-plane-switching (VA-IPS) mode with respect to different driving voltages is studied. It is found that the rising time, T_(on), is highly related to the square of the electric field between the inter-digit electrodes. Since the dielectric torque exerted on the liquid crystal molecules is proportional to the square of the electric field, one can say that it basically dominates the T_(on) of the VA-IPS mode. However, there's evidence showing that the total torque perceived by the LC molecules is not simply caused by the voltage applied to the inter-digit electrodes, but also by the flexoelectricity originating from the splay deformation between the electrodes. This leads to the phenomenon that T_(on) doesn't monotonically decrease with the increasing dielectric torque.