Foldable Display Panel Photo Spacer Width Gradient
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Solution Overview
Problem
Foldable display panels face challenges in dispersing stress during folding, which affects their foldability and ability to meet flexibility requirements.
Innovation Solution
A foldable display panel design featuring a flexible substrate with photo spacers in the folded region, where the widths of the spacers gradually decrease from the substrate, made from organic photoresist material, forming a bumpy surface to distribute stress and enhance frictional support, thereby improving foldability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If photo spacers with uniform width are used in the folded region, then the structure is simple to manufacture, but stress concentration occurs during folding reducing foldability
Solution Approach 1:
The photo spacers are designed with varying widths where the width gradually decreases from the flexible substrate toward the folded region. This local variation in geometry allows different parts of the spacer to serve different functions: wider portions provide structural support while narrower portions reduce stress concentration, thereby improving foldability without significantly complicating the manufacturing process
2Strength
If photo spacers with larger width are used, then structural support is enhanced, but stress concentration increases during folding
Solution Approach 1:
The width parameter of the photo spacers is systematically varied across different regions. By controlling the width to gradually decrease from the substrate toward the folded area, the design achieves optimal balance between providing sufficient structural support and minimizing stress concentration during folding operations
3Reliability
If photo spacers with varying heights are used, then stress distribution is improved, but manufacturing complexity increases
Solution Approach 1:
Photo spacers with different heights are positioned at specific locations within the folded region based on local stress requirements. This localized variation in height provides enhanced stress distribution where needed while maintaining simpler uniform structures in other areas, thus balancing manufacturing complexity with performance improvement
Data Source
AI summary
A foldable display panel and a manufacturing method of the display panel are provided. A plurality of photo spacers are disposed in a first region of the foldable display panel, i.e., the plurality of photo spacers are disposed at a folded position. Widths of the photo spacers gradually decrease from a flexible substrate to a direction away from the flexible substrate. When the foldable display panel is folded, the photo spacers can cooperate with a folding curve to contact with each other, thereby reducing extrusion between the plurality of photo spacers.