High-transmittance and fast-response PA-FFS liquid crystal device using half-shifted dual electrodes

A half-shifted dual-electrode parallel-aligned fringe-field switching (PA-FFS) liquid crystal device is proposed. The effects of electrode configuration and cell gap on electric-field distribution, molecular rotation behaviour, transmittance, and response time are investigated using three-dimensional numerical simulations. The results show that thinner cell gaps provide higher transmittance, whereas thicker cell gaps exhibit more favourable PA-FFS driving characteristics with reduced interaction between the upper and lower LC layers. By redistributing and compensating the virtual-wall regions through the half-shifted electrode configuration, high transmittance can be achieved without significantly sacrificing response speed. The proposed structure therefore demonstrates strong potential for high-performance applications in photonics and virtual-reality (VR) displays that require both fast response and high optical efficiency.