液晶与显示2026，Vol.41Issue(7)：942-951,10.DOI:10.37188/CJLCD.2026-0130
盒厚约束下液晶过压驱动光学反弹的非对称弛豫特性
Cell-Gap-Constrained asymmetric relaxation characteristics of optical bounce in overdriven liquid crystal devices
摘要
Abstract
Overdriving technology(OD)accelerates the response of liquid crystal(LC)devices but frequently induces significant optical bounce(OB).Based on the Ericksen-Leslie continuum theory,this paper establishes a finite-difference model and reveals that the physical origin of OB lies in the asynchronous relaxation of LC directors within the confined space.By simulating the spatial distributions of director tilt angle and angular velocity,it is found that the interlayer angular velocity difference induced by overdrive is the microscopic source triggering OB.Focusing on the cell gap(5～15 µm)as a key geometric parameter,this paper reveals the evolutionary laws of asynchronous relaxation constrained by cell gap and its regulatory mechanism on the asymmetric OB characteristics under overdrive modes.The simulated and experimental results exhibit consistent trends.The results demonstrate that,under a constant overdrive voltage difference,overshoot and undershoot driving exhibit opposite relaxation trends:during undershoot driving,the elastic restoring force decays quadratically with cell gap,making it difficult for thicker cells to suppress interlayer asynchronous relaxation;the bounce depth ratio(BDR)increases from approximately 2%at 5 µm to over 20%at 15 µm.During overshoot driving,the internal electric field attenuates linearly with cell gap,weakening the interlayer angular velocity difference at its source;the BDR decreases from 15.7%to below 4%.After eliminating the interference of driving field attenuation through constant electric field control experiments and constant average tilt-angle simulations,the BDR for both modes increases monotonically with cell gap.From the perspective of asynchronous relaxation,this study clarifies the dominant role of cell gap in governing asymmetric OB,providing a theoretical basis for the dimensional optimization of high-speed LC devices.关键词
过压驱动技术/光学反弹/转速差/异步弛豫Key words
overdrive technology/optical bounce/angular velocity difference/asynchronous relaxation分类
数理科学引用本文复制引用
孙海峰,陈雅丽,刘嘉乐,刘鑫,孙敬伟,姚丽双..盒厚约束下液晶过压驱动光学反弹的非对称弛豫特性[J].液晶与显示,2026,41(7):942-951,10.基金项目
广东省科技创新战略专项资金(省重点实验室)(No.2023B1212020004) （省重点实验室）
广东省科技创新战略专项市县科技创新支撑(大专项+任务清单)项目(No.STKJ2023074)Supported by Guangdong Provincial Science and Technology Innovation Strategy Special Fund(Provincial Key Laboratory)(No.2023B1212020004) （大专项+任务清单）
Special Fund for Guangdong Provincial Science and Technology Innovation Strategy(City-County Science and Technology Innovation Support Project)(No.STKJ2023074) （City-County Science and Technology Innovation Support Project）
