Undulating Signal Lines in Flexible Display Buffer Layers
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Solution Overview
Problem
Conventional flexible display panels face malfunctions due to excessive stress on signal lines when folded, leading to breakage and malfunction, as the folding amplitude is large and the stress on these lines is substantial.
Innovation Solution
A flexible array substrate with a buffer layer having a curved or polyline shape with undulating portions, where signal lines are arranged in a corresponding curved or polyline shape, and through holes or grooves are incorporated in the buffer layer to alleviate bending stress, allowing for efficient stress distribution and protection of signal lines during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is folded with large folding height, then the flexibility and adaptability of the display panel are improved, but the stress on the signal lines increases causing breakage and malfunction
Solution Approach 1:
The buffer layer is designed with a curved cross-sectional shape featuring undulating portions (waves or pulses) instead of a straight configuration. This curvature allows the signal lines to follow a gentle arc when folded, distributing mechanical stress away from critical points and preventing breakage while maintaining flexibility for various folding amplitudes
Solution Approach 2:
The buffer layer is divided into multiple unit layers stacked together, with through holes or grooves created in each unit layer. This segmentation allows independent stress management in each layer, enabling the structure to flex without concentrating stress in a single continuous layer, thereby protecting the signal lines during folding
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 solution effectively reduces bending stress on signal lines, preventing breakage and ensuring the display panel's functionality even when subjected to significant folding, thereby enhancing the durability and reliability of flexible display panels.
Implementation Method 1
a through hole or a groove is disposed on each of the unit layers to release a bending stress
Data Source
AI summary
A flexible array substrate and a display panel are provided. The flexible array substrate comprises a flexible substrate, a buffer layer, a plurality of signal lines, and pixel electrodes. The buffer layer is disposed on the flexible substrate. The plurality of signal lines is disposed on the buffer layer. A shape of the signal lines in a cross-sectional direction of the flexible array substrate is a curved shape with undulating portions or a polyline shape with undulating portions. In the disclosure, the signal line that has a curved shape with undulating portions or a polyline shape with undulating portions is disposed on the buffer layer, so that the signal line is able to cope with bending stress when bending.