光学精密工程2025，Vol.33Issue(23)：3639-3648,10.DOI:10.37188/OPE.20253323.3639
采用DIC技术的液晶显示模组力学模型验证
Verification of mechanical model of LCD modules using DIC technology
摘要
Abstract
To address the simulation errors arising from the omission of actual structural details in mechani-cal studies of LCD modules,as well as the limitations of conventional universal testing machines that pro-vide only global load information and cannot directly validate complex displacement field distributions,a three-dimensional finite element model incorporating complete structural features is established.The mod-el is developed through precise geometric modeling that preserves key structural characteristics,an opti-mized mesh partitioning strategy that balances computational efficiency and accuracy,and material parame-ter definitions derived from experimental measurements and reliable data sources.Based on this model,the full-field displacement distribution and local response characteristics of LCD modules under static in-dentation and compression-bending loads are systematically investigated.Furthermore,a comprehensive full-field displacement verification framework is constructed using three-dimensional digital image correla-tion(DIC)technology.Experimental results indicate that,in single-point static indentation tests,the rela-tive error between the simulated displacement field and DIC measurements in the compressed region is less than 10%;additional comparison of static indentation behavior at seven characteristic points further reduc-es the discrepancy to within 5%.Detailed analysis reveals that boundary constraint conditions—particular-ly the treatment of lateral degrees of freedom-and local structural stiffness effects,such as edge stiffening,are key factors governing the predictive accuracy of the model.These factors are closely associated with the mechanical origins of optical defects,including light leakage and surface indentations,commonly ob-served in LCD modules during service.The results demonstrate that the developed finite element model provides high accuracy in predicting the behavior of core compressed regions and in-plane responses.The modeling and validation methodology presented herein offers a reliable theoretical and technical basis for subsequent structural optimization and reliability design of LCD modules and establishes an important foun-dation for understanding and mitigating optical display defects from a mechanical perspective.关键词
液晶显示模组/数字图像相关/全场位移/有限元仿真Key words
LCD module/digital image correlation/full-field displacement/finite element simulation分类
机械制造引用本文复制引用
FANG Jingjing,YU Qing,JIANG Hao,ZHENG Weifeng,YAN Huasheng,ZOU Song,GUO Danyu..采用DIC技术的液晶显示模组力学模型验证[J].光学精密工程,2025,33(23):3639-3648,10.基金项目
国家自然科学基金资助项目(No.52075190,No.52211530491) （No.52075190,No.52211530491）
福建省科技计划资助项目(No.2023I0017) （No.2023I0017）
国家市场监督管理总局科技计划资助项目(No.2023MK136) （No.2023MK136）
