The Influence of the Bending Mode on the Mechanical Behavior of AMOLEDs

Bo Wang; Zeyu Zhang; Weiwei Su; Wenxin Zhang; Qiujun Wang; Di Zhang; Fang Zhang

doi:10.1109/ACCESS.2021.3127185

IEEE Access (Jan 2021)

The Influence of the Bending Mode on the Mechanical Behavior of AMOLEDs

Bo Wang,
Zeyu Zhang,
Weiwei Su,
Wenxin Zhang,
Qiujun Wang,
Di Zhang,
Fang Zhang

Affiliations

Bo Wang: ORCiD; Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, China
Zeyu Zhang: Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, China
Weiwei Su: Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, China
Wenxin Zhang: Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, China
Qiujun Wang: Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, China
Di Zhang: Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, China
Fang Zhang: Yungu (Gu’an) Technology Company Ltd., Langfang, China

DOI: https://doi.org/10.1109/ACCESS.2021.3127185
Journal volume & issue: Vol. 9
pp. 152442 – 152448

Abstract

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Structural optimization has always been the main solution for increasing the stability of flexible screens. The bending method used to test a flexible display screen is an important factor in assessing the functionality and practicability of the electronic device. The bending mode of the display screen impacts the screen service life. In this study, 2D simulation models with different bending radii, bending directions, and bending times were constructed in ABAQUS and compared to determine the effects on the flexible screen from changing the stress value, the location of the stress concentration area and the deformation state of the screen under U- and water-drop-shaped bending. The simulation results show that U-shaped bending severely strains the junction between the bent and unbent areas of a model, whereas water-drop-shaped bending can avoid such problems. In addition, the results of multiple bending experiments were used to determine an appropriate reserved length of r=2.1~2.4 mm for a model under water-drop-shaped bending.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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