The bending reliability is the key characteristic of foldable organic light-emitting diode (OLED) panel. In the bending process of foldable OLED panel module, display supporting layer crack and optically clear adhesive (OCA) layer peeling issue often occur. In this study, a periodic pattern supporting layer is designed to solve the peeling and crack issue. The finite element method for simulating the foldable panel was constructed to investigate the correlation between the dimensions of the periodic pattern substructure and the crack stress. The results show that the periodic pattern substructure can decrease the modulus of the bending zone, which can significantly improve the flexibility of the supporting layer. It makes the deformations of OCA to be coordinated during the bending process, thus effectively reducing the peeling issue. In addition, the crack stress values of the periodic pattern substructure directly rely on its dimensions. It indicates that a proper design of the pattern substructure and feature dimensions is important to improve the bending reliability of the OLED panel.

中文翻译：

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可折叠有机发光二极管显示支撑层的力学模拟

弯曲可靠性是可折叠有机发光二极管 (OLED) 面板的关键特性。在可折叠OLED面板模组的折弯过程中，经常会出现显示支撑层开裂和光学透明胶（OCA）层剥离问题。在这项研究中，设计了一个周期性图案支撑层来解决剥离和裂纹问题。构建了用于模拟可折叠面板的有限元方法，以研究周期性图案子结构的尺寸与裂纹应力之间的相关性。结果表明，周期性花纹亚结构可以降低弯曲区的模量，显着提高支撑层的柔韧性。它使OCA在弯曲过程中的变形得到协调，从而有效地减少了剥离问题。此外，周期性图案子结构的裂纹应力值直接取决于其尺寸。这表明图形子结构和特征尺寸的适当设计对于提高OLED面板的弯曲可靠性很重要。