Foldable Display Support Plate Structure for Stress-Managed Bending
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Solution Overview
Problem
Existing foldable display devices lack sufficient flexibility and structural support, leading to stress concentration and potential damage during repeated folding operations.
Innovation Solution
A display device design featuring a folding region with a plate structure that includes curved portions and grooves, supported by spaced-apart support parts, with specific area ratios and groove configurations to distribute stress and enhance flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid plate structure is used to maintain structural integrity, then strength is improved, but flexibility deteriorates
Solution Approach 1:
The plate is divided into multiple curved portions (first curved portion and second curved portions) with different area ratios and groove configurations. This segmentation allows each portion to contribute differently to flexibility while maintaining overall structural integrity through the unified plate design.
Solution Approach 2:
Different regions of the plate have different properties: the first curved portion has a larger area ratio (65-90%) with openings for high flexibility, while the second curved portions have smaller area ratios (10-35%) with grooves for moderate flexibility. This local differentiation optimizes both flexibility and strength in different areas.
2Strength
If the plate thickness is increased to improve strength, then structural integrity is improved, but stress concentration during folding worsens
Solution Approach 1:
The plate is segmented into multiple curved portions with different thickness distributions. The grooves and openings create localized thinning in specific areas, which reduces stress concentration during folding while maintaining adequate thickness in other areas for overall strength.
Solution Approach 2:
The plate incorporates curved portions with specific curvature radii that distribute stress more evenly during folding. The first curved portion has a first curvature radius and the second curved portions have a second curvature radius, optimizing stress distribution while maintaining structural integrity.
3Adaptability or versatility
If grooves are added to enhance flexibility, then folding performance is improved, but manufacturing complexity increases
Solution Approach 1:
Grooves are added only in specific regions (second curved portions) rather than throughout the entire plate. This localized approach enhances flexibility where needed while minimizing manufacturing complexity and maintaining simplicity in other areas.
Solution Approach 2:
Instead of adding grooves to the entire plate, the design applies grooves partially only to the second curved portions. This partial action achieves the necessary flexibility improvement without the excessive complexity that would result from comprehensive groove implementation.
Data Source
AI summary
Provided is a display device including a display module having a first non-folding region, a second non-folding region, and a folding region disposed between the first non-folding region and the second non-folding region, and a plate disposed below the display module, and having a folding part overlapping the folding region and to be folded with respect to a folding axis extending in a first direction and first and second support parts spaced apart from each other with the folding part disposed therebetween. The folding part includes a first curved portion and second curved portions spaced apart from the first curved portion and disposed between the first curved portion and the first support part and between the first curved portion and the second support part, and the first curved portion has openings passing therethrough and the second curved portions each have at least first groove by being partially recessed.