CAJ | 학술논문

为了探究加固液晶屏高温下热应力影响,建立了基于ANSYS的液晶屏复合结构的有限元分析模型,模拟分析了二维模型等效应力和液晶层上边界Y方向应力的分布情况。仿真结果表明,当环境温度上升到70℃,胶层中气泡和裂纹附近会发生应力集中,液晶盒上边界也会发生相应位置Y方向应力集中。将三种光学胶实际测试的力学数据代入模型分析发现,光学胶的弹性模量和热膨胀系数越大,引起的应力集中也越明显。基于模拟分析,胶层中含有裂纹时液晶屏所受应力最大,因此加工中应避免胶层出现裂纹。在对液晶屏粘贴ITO玻璃时,应该选用弹性模量和线膨胀系数较小的光学胶。
위료탐구가고액정병고온하열응력영향,건립료기우ANSYS적액정병복합결구적유한원분석모형,모의분석료이유모형등효응력화액정층상변계Y방향응력적분포정황。방진결과표명,당배경온도상승도70℃,효층중기포화렬문부근회발생응력집중,액정합상변계야회발생상응위치Y방향응력집중。장삼충광학효실제측시적역학수거대입모형분석발현,광학효적탄성모량화열팽창계수월대,인기적응력집중야월명현。기우모의분석,효층중함유렬문시액정병소수응력최대,인차가공중응피면효층출현렬문。재대액정병점첩ITO파리시,응해선용탄성모량화선팽창계수교소적광학효。
In order to analyze the effects of the thermal stress on rugged LCDs under high temperature, a finite element model of a LCD laminated structure is established. This paper describes the equivalent stress of a two-dimensional model and the Y-direction stress on the LC cell. The simulation results show that when the ambient temperature rises to 70%, the stress concentration happens near the bubbles and cracks in the optical adhesive layer as well as the Y-direction stress concentration on the LC cell. The actual parameters of three kinds of optical adhesive are measured and input into the model. The simulation results indicate larger the elastic modulus and thermal expansion coefficient of optical adhesives, larger the stress concentration. Based on the simulation results, the stress on the LC cell is largest when there are cracks in the optical adhesive, which should be avoided in processing. The optical adhesives with small elastic modulus and thermal expansion coefficient are suggested when laminating ITO glass onto LC panel.