Maximizing electro-optic performances in the fringe-field switching liquid crystal mode with negative dielectric anisotropic liquid crystal

摘要

The fringe-field switching (FFS) mode that uses liquid crystals (LCs) with negative dielectric anisotropy is used in high-resolution FFS liquid crystal display owing to its higher transmittance over positive LC, although its response time becomes slow and operating voltage (V_(op)) becomes high. In the device, reduction of the cell gap is required to achieve fast response time, which results in increase in V_(op) in general. In this paper, we propose the FFS mode with electrode width 1 μm and distance between the electrodes 1.5 μm. In such an electrode structure, V_(op) decreases with decreasing cell gap to 2 μm so that a proper V_(op), high LC's light efficiency of 90%, a high color temperature, and a fast response time less than 10 ms, can be achieved, which maximizes electro-optic performance of the FFS mode.