Flexible Display Module Gap Structure for Fold Stress Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing flexible display modules are prone to cracking and draping due to significant stress when folded or stretched, leading to poor display performance.
Innovation Solution
Incorporating first gaps in the flexible substrate that extend from one side surface to another, spacing adjacent pixel units apart, and employing movable routing sections and separation columns to distribute stress, thereby reducing pulling and extrusion stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flexible display module is folded to reduce volume and improve portability, then the material layers are subjected to significant stress, but this causes the material layers to crack or drape, deteriorating display performance
Solution Approach 1:
The flexible substrate is divided into multiple regions by introducing first gaps that extend from the first side surface to the second side surface in the thickness direction. These gaps segment the substrate into multiple independent regions that can deform independently during folding, reducing stress concentration on any single region and preventing cracking or draping of the material layers.
2Area of stationary object
If pixel units are arranged closely to maximize display area, then the display area increases, but the pulling stress and extrusion stress between adjacent pixel units increase during folding
Solution Approach 1:
The display area is segmented into multiple independent regions by the first gaps. Adjacent pixel units located in different regions separated by gaps can move independently during folding, reducing the pulling stress and extrusion stress between them while maintaining a large overall display area.
Solution Approach 2:
The first gaps act as intermediary spaces between adjacent pixel units, providing buffer zones that accommodate deformation during folding. These gaps reduce the direct stress interaction between pixel units while allowing the display to maintain its structural integrity.
Data Source
AI summary
A flexible display module and an electronic device are provided. The flexible display module includes a flexible substrate and a plurality of pixel units. The flexible substrate has a folding region that is provided with a first gap. The first gap extends from a first side surface to a second side surface in a thickness direction of the flexible substrate. A first preset distance is reserved between one end of the first gap and the second side surface of the flexible substrate. The first gap penetrates through the flexible substrate along a lengthwise direction or a width direction of the flexible substrate. A plurality of pixel units are distributed on the first side surface of the flexible substrate at intervals. The pixel units adjacent to the first gap are spaced apart from the first gap.