采用DIC技术的液晶显示模组力学模型验证

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中图分类号：TH741 文献标识码：Adoi：10.37188/OPE.20253323.3639

Abstract：To addressthe simulation errors arising from the omission of actual structural details in mechanical studies of LCD modules，as wel as the limitations ofconventional 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 model is developed through precise geometric modeling that preserves key structural characteristics，an optimized mesh partitioning strategy that balances computational eficiency and accuracy，and material parameter 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 indentation and compression- bending loads are systematically investigated.Furthermore，a comprehensive ful-field displacement verification framework is constructed using three-dimensional digital image correlation（DIC） technology. Experimental results indicate that，in single-point static indentation tests，the relative 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 reduces the discrepancy to within 5% . Detailed analysis reveals that boundary constraint conditions-particularly the treatment of lateral degrees of freedom-and local structural stifness efcts，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 observed 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 modelig and validation methodology presented herein ofers a reliable theoretical and technical basis for subsequent structural optimization and reliability design of LCD modules and establishes an important foundation for understanding and mitigating optical display defects from a mechanical perspective.

Key words： LCD module；digital image correlation；full-field displacement；finite element simulation

1引言

液晶显示技术（LiquidCrystalDisplay，LCD）因成本低廉、寿命长、显示效果优异，已广泛应用于手机、电脑和大屏幕等工作场景[1-2]。（剩余13516字）