Mechanical property test of OLED bending area based on discrete element method

Abstract

Gradually, OLED all screen has become one of mainstream mobile display devices. In this technology, the metal wiring in the bending area is prone to breakage, thus forming dead pixels. The yield rate may be affected by it. Therefore, the stress-strain analysis for the bending area in the bending process has become one of the main problems in OLED research. Firstly, the structural characteristics of OLED were analyzed, and the bending technology was introduced and analyzed. Secondly, the test process of discrete element method was analyzed. Finally, the strain analysis model was established through the multi-layer stacking characteristics of bending area. Moreover, the simulation of bending process was completed by quasi-static analysis. Then, the validity of analysis was verified by the test comparison. The results show that the proposed method can not only analyze the mechanical properties of OLED bending area effectively under different cover plate stiffness, and the maximum error rate of the method is only 4.87, which is far lower than the traditional method. Therefore, the content and conclusion provide the further research of mechanical properties of OLED bending area with an important technical foundation.