Fast-response LCD with rhombic staggered pixel electrode for virtual reality displays

A rhombic staggered pixel electrode structure is proposed for virtual reality (VR) displays, achieving fast response times, high transmittance, and low driving voltage. In this design, the initial alignment of the liquid crystal (LC) molecules is configured parallel to the orientation of the rhombic electrodes. The presence of an oblique electric field in this structure eliminates the need for a non-zero pretilt angle. The distinctive vertex geometry of the pixel electrode amplifies the local electric field at the tips, thereby inducing significant angular displacement of the LC molecules. Furthermore, this asymmetric configuration facilitates the rapid recovery of the LC director upon voltage removal, promoting swift relaxation to the equilibrium state. Consequently, the response time is substantially reduced. Simulation results demonstrate that this structure achieves a high transmittance of 76% at a relatively low driving voltage (5.1 Vrms). Moreover, it maintains rapid switching dynamics, with a rise time of 3.99 ms and a fall time of 3.25 ms-performance metrics that are highly favourable for high-end VR display applications.