Wave-Shaped Buffer Structure for Flexible Display Stress Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display devices face issues with poor bending resistance and high film stress, especially when the radius of curvature is small, leading to display problems and low reliability.
Innovation Solution
A flexible display panel with a buffer structure having a wave shape and discontinuous grooves is introduced in the bending region, made from a substrate with a thickness of 1 to 15 microns, to distribute and release stress when bent, improving bending resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display panel is bent with a small radius of curvature, then the flexibility and dynamic bendability are improved, but the film stress becomes excessive causing display problems and poor bending resistance
Solution Approach 1:
The buffer structure is divided into multiple independent grooves that are distributed across the bending region. These segmented grooves work independently to release stress at different locations, preventing stress concentration while maintaining overall structural integrity during bending with small radius of curvature
Solution Approach 2:
The buffer structure is specifically positioned only in the bending region where stress occurs, with a thickness of 1 to 15 microns. This localized structure provides stress release functionality exactly where needed without affecting the overall display quality or adding unnecessary complexity to non-bending areas
2Stress or pressure
If the buffer structure is made as a continuous layer, then the stress distribution is improved, but the manufacturing complexity and material usage increase
Solution Approach 1:
The buffer structure is designed as multiple independent grooves rather than a continuous layer. This segmentation reduces material usage and simplifies manufacturing while still achieving effective stress distribution through the distributed arrangement of grooves across the bending region
Solution Approach 2:
The buffer structure adopts a porous-like discontinuous configuration with grooves that allow stress to be released through multiple pathways. This porous approach maintains stress distribution effectiveness while reducing material consumption and manufacturing complexity compared to a solid continuous layer
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The buffer structure effectively reduces stress concentration on the screen during bending, enhancing the panel's reliability and bending resistance.
Implementation Method 1
when the flexible display panel is bent, the stress generated when the film is bent is released by the buffer structure to prevent stress concentration
Data Source
AI summary
The present invention provides a flexible display panel and a manufacturing method thereof. The flexible display panel includes a substrate made of a flexible material, a thin film transistor substrate disposed on the substrate, a light emitting layer disposed on the thin film transistor substrate, and an encapsulation layer disposed on the light-emitting layer. A bending region is disposed in a display area of the flexible display panel, and a buffer structure having a wave shape is disposed at the bending region on a side of the substrate away from the thin film transistor substrate.