柔性OLED模组的落笔冲击仿真与模组优化分析

Pencil-impacted simulation and module optimization analysis of flexible OLED module

柔性OLED模组在使用过程中,由于撞击等因素,会导致内部元器件受损。修改模组的结构,通过机械试验测试性能,是提升模组抗冲击性能的有效办法。本文通过有限元仿真的方法,建立了落笔冲击试验的有限元模型,分析了落笔冲击中使用单层盖板与双层盖板、改变盖板的厚度与模量、改变OCA胶层的厚度与模量、是否增加钢片(SUS)层等因素对柔性OLED显示模组中比较容易受损的薄膜封装(TFE)层的最大应变的影响。仿真结果表明,使用双层盖板结构、增加上侧盖板和OCA胶材的厚度和模量、在底板下侧增加钢片层,能减小TFE层的最大应变,对提高模组的抗冲击性能有利,并通过试验验证了部分结果。仿真结果为优化结构设计、改善现有结构的抗冲击性能提供了指导。

The internal components of flexible OLED module will be damaged due to impact and other factors while used.Modifying the structure of the module and testing the performance through mechanical test are the effective way to improve the impact resistance strength of the module.In this paper,the finite element simulation method is used to establish a finite element model of pencil-impacted test.The model is used to analyze how the single or double cover window,the different thickness and modulus of cover window,the different thickness and modulus of OCA layers and whether add a SUS layer under the bottom will influence the maximum strain of TFE layer which is easily damaged in OLED panel.The simulation results show that using the double cover window structure,increasing the thickness and modulus of the upper cover window and OCA layer,and adding a steel SUS layer under the bottom plate can reduce the maximum strain of the TFE layer,which is beneficial to improving the impact resistance strength of the module,and some results are verified by the test.The simulation results provide guidance for optimizing structural design and improving the impact resistance strength of existing structures.