Foldable Display Support Substrate With Varying Opening Patterns
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Solution Overview
Problem
Foldable display devices experience damage and degraded display quality due to uneven stress distribution during folding and unfolding, leading to potential structural failures and reduced impact resistance.
Innovation Solution
A foldable display device design featuring a support substrate with varying opening patterns in different folding areas, where the widths of these patterns are gradually increased towards non-folding areas to distribute stress more evenly, and a thicker coating layer is applied to high-stress areas to enhance impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a support substrate with opening patterns is used to enable folding, then flexibility is improved, but stress concentration in folding areas causes damage to the display panel
Solution Approach 1:
The patent applies local quality by varying the width of opening patterns in different regions of the support substrate. Specifically, opening patterns in high-stress folding areas have different dimensions compared to those in low-stress areas, allowing each region to have optimized stress distribution characteristics while maintaining overall flexibility of the display device
Solution Approach 2:
The patent changes physical parameters of the opening patterns, specifically the width, by gradually increasing or decreasing it across different folding areas. This parameter variation allows the support substrate to distribute stress more evenly during folding and unfolding operations, reducing peak stress concentrations that would otherwise cause damage to the display panel
2Ease of manufacture
If uniform opening patterns are used in the support substrate, then manufacturing is simplified, but stress distribution becomes uneven causing damage in high-stress areas
Solution Approach 1:
The patent implements local quality by designing opening patterns with different widths in different regions of the support substrate. This regional differentiation optimizes stress distribution in high-stress folding areas while maintaining reasonable manufacturing complexity through systematic pattern design
3Device complexity
If the support substrate structure is simplified, then device complexity is reduced, but impact resistance deteriorates
Solution Approach 1:
The patent modifies parameters of existing opening patterns in the support substrate, specifically varying their widths across different regions. This approach enhances impact resistance by improving stress distribution during folding operations without adding complex new structural elements, thereby maintaining relatively simple device architecture
Data Source
AI summary
A foldable display device includes a first non-folding area, a first folding area, a second non-folding area, a second folding area, and a third non-folding area which are sequentially located along a folding direction, and a support substrate disposed below the display panel to support the display panel and including a plurality of opening patterns corresponding to the first folding area and the second folding area, so that a stress due to the folding during the process of folding or unfolding the foldable display device is relieved and suppress a damage that can be caused in the foldable display device.