Flexible Display Panel Groove Layout for Bending Stress Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing flexible AMOLED displays face issues with thickness and touch experience due to stress concentration and potential fractures in the bending area, particularly in the back plane with multiple film layers.
Innovation Solution
Incorporating grooves in the organic insulation layer, particularly in the peripheral and bending areas, to disperse bending stress and prevent fractures, while maintaining the layer structure integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the back plane structure with multiple film layers is used to achieve comprehensive protection and insulation, then the protection and insulation performance are improved, but the thickness increases and stress concentration occurs in the bending area
Solution Approach 1:
The back plane is divided into a display area back plane and a peripheral area back plane, with different structural configurations in each region. The display area back plane maintains comprehensive protection while the peripheral area back plane is optimized for bending flexibility, resolving the contradiction between protection performance and thickness.
Solution Approach 2:
Different regions of the back plane are designed with different structural qualities - the display area uses a multi-layer structure for protection and insulation, while the peripheral area uses a simplified structure with grooves to reduce thickness and improve bendability, allowing each region to optimize its local properties.
2Reliability
If the back plane structure with multiple film layers is used to achieve comprehensive protection and insulation, then the protection and insulation performance are improved, but stress concentration occurs in the bending area leading to potential fractures
Solution Approach 1:
The back plane is segmented into display area and peripheral area with different structural characteristics. The peripheral area back plane includes grooves that divide the structure into multiple independent sections, preventing stress concentration and potential fractures during bending while maintaining protection performance in the display area.
Solution Approach 2:
The peripheral area back plane is designed with local structural modifications including grooves and reduced layer configuration, creating different mechanical properties in different regions. This allows the bending area to have improved flexibility and stress distribution while the display area maintains comprehensive protection.
3Strength
If grooves are added in the organic insulation layer to disperse bending stress, then the抗弯曲强度 is improved, but the structural complexity increases
Solution Approach 1:
Grooves are introduced in the organic insulation layer to segment the peripheral area back plane into multiple independent sections. This segmentation disperses bending stress across multiple sections rather than concentrating it in one location, improving bendability while the grooves are positioned to minimize impact on overall structural simplicity.
Data Source
AI summary
A flexible display panel and a manufacturing method thereof, and a flexible display apparatus are disclosed. The flexible display panel includes: a flexible substrate, the flexible substrate including a display area, a peripheral area, a welding area and a bending area, and the bending area including a first edge; and the flexible display panel further includes: a barrier and an organic insulation layer, wherein the peripheral area includes a peripheral transition area between the bending area and the display area, the organic insulation layer in the peripheral transition area is provided with a first groove, the first groove is on one side of the barrier and extends along a direction substantially parallel to a bending axis, and the first groove is on one side of the first edge proximal to the display area.