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1.汕头大学 理学院, 广东 汕头 515063
2.中国科学院 长春光学精密机械与物理研究所, 吉林 长春 130033
3.汕头大学 工学院, 广东 汕头 515063
4.广东省车载显示触控技术企业重点实验室, 广东 汕头 515047
Received:02 April 2026,
Revised:2026-04-16,
Published:05 May 2026
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SUN Haifeng, ZHU Kang, LIU Jiale, et al. Suppression of optical bounce in overdrive liquid crystal devices[J]. Chinese Journal of Liquid Crystals and Displays, 2026, 41(5): 626-636.
SUN Haifeng, ZHU Kang, LIU Jiale, et al. Suppression of optical bounce in overdrive liquid crystal devices[J]. Chinese Journal of Liquid Crystals and Displays, 2026, 41(5): 626-636. DOI: 10.37188/CJLCD.2026-0066. CSTR: 32172.14.CJLCD.2026-0066.
液晶显示技术凭借其成熟的制造工艺与优异的性价比,在显示面板市场占据重要地位,但其响应速度仍是制约高速动态显示及光调控的关键因素,过压驱动技术(Overdriving, OD)虽能有效缩短响应时间,却常伴随响应曲线的光学反弹(Optical Bounce,OB)现象,严重劣化高速、高精度显示质量。本文基于Frank弹性理论与Ericksen-Leslie流体动力学方程,通过分析过压下液晶分子指向矢的动态响应过程,深入揭示了光学反弹现象的形成机理:过驱动电压在液晶层内引发的分子转动速度的空间非均匀分布,中间层分子与基板附近分子之间的转速差造成了过压下器件的光学反弹现象。基于此机理,本文提出了一种通过精确调控过驱动电压幅值来抑制光学反弹的优化技术。实验采用10 μm反平行排列的LC-BYE7向列相液晶器件进行模拟结果验证。结果表明,优化过驱动电压可有效削弱液晶器件内部的转动速度差,光学反弹凹陷程度最高可降低57.2%,同时响应时间减小18 ms,可有效改善显示效果。本研究提出的方法不仅验证了理论模型的准确性,也为液晶器件在高品质动态显示与快速波前调制等领域的应用提供了具有工程实用价值的技术路径。
Liquid crystal(LC) display technology maintains a dominant position in the panel market due to its mature manufacturing processes and superior cost-effectiveness. However, its response speed is still a critical factor restricting high-speed dynamic displays and optical modulation. While overdriving(OD) techniques can effectively shorten response times, they are frequently accompanied by the optical bounce (OB) phenomenon in the response curve, which severely degrades the quality of high-speed and high-precision displays. Based on Frank’s elasticity theory and the Ericksen-Leslie hydrodynamic equations, this study thoroughly elucidates the formation mechanism of the OB phenomenon by analyzing the dynamic response process of the LC molecular director under overdrive conditions. It is revealed that the overdrive voltage induces a spatially non-uniform distribution of molecular rotational velocities within the LC layer; the rotational velocity difference between the molecules in the bulk layer and those near the substrates triggers the OB phenomenon. Based on this mechanism, we propose an optimization technique to suppress OB by precisely modulating the overdrive voltage amplitude. Experiments using a 10 μm anti-parallel aligned LC-BYE7 nematic LC device were conducted to verify the simulation results. The results demonstrate that optimizing the overdrive voltage effectively mitigates the internal rotational velocity difference, reducing the depth of the OB by up to 57.2% and decreasing the response time by 18 ms, thereby effectively improving display performance. The method proposed in this study not only validates the accuracy of the theoretical model but also provides a technically viable pathway with practical engineering value for the application of LC devices in fields such as high-quality dynamic displays and rapid wavefront modulation.
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