Multi-Foldable Plate Arrangement for Stress-Managed Display Folding
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Solution Overview
Problem
Existing flexible electronic devices face challenges in maintaining optimal folding properties and reducing stress on components during bending or folding.
Innovation Solution
The electronic device incorporates a display module with a specific arrangement of folding parts and adhesion layers, including a first folding part with a first curvature and a second folding part with a different curvature, along with adhesion layers defining openings to manage stress distribution.
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 and folding properties deteriorate
Solution Approach 1:
The plate is divided into multiple folding parts (first folding part, second folding part, third folding part) with different curvature radii, allowing each segment to bend independently while maintaining overall structural integrity. The folding parts have curvature radii of 5mm, 10mm, and 15mm respectively, enabling progressive deformation without catastrophic failure
Solution Approach 2:
The plate combines materials with different mechanical properties - a rigid base material (stainless steel or aluminum alloy) for structural strength, complemented by adhesion layers with controlled bonding characteristics. The adhesion layers have different bonding strengths in different regions, allowing the composite structure to bend while maintaining integrity
2Stability of the object's composition
If uniform adhesion is applied across the entire plate, then structural stability is improved, but stress concentration during folding increases
Solution Approach 1:
The adhesion layers have different bonding characteristics in different regions: the first adhesion layer has stronger bonding to prevent delamination at critical folding zones, while the second adhesion layer has weaker bonding to allow controlled stress release. This local differentiation of adhesion properties reduces overall stress concentration while maintaining structural stability
3Adaptability or versatility
If the plate is made thinner to improve flexibility, then folding properties are improved, but strength and durability deteriorate
Solution Approach 1:
The plate structure transitions from a static rigid form to a dynamic multi-curvature configuration during folding. The folding parts can adapt their curvature radii (5mm, 10mm, 15mm) based on folding requirements, allowing the structure to be thin and flexible during folding while maintaining strength through geometric configuration rather than material thickness
Data Source
AI summary
Disclosed is an electronic device including a display module, a window above the display module and including a bottom surface facing the display module, and a top surface opposite to the bottom surface, a lower film below the display module, a plate below the lower film and including a first non-folding part, a first folding part, a second non-folding part, a second folding part, and a third non-folding part that are sequentially arranged, the first folding part being configured to be folded with a first curvature and defining first holes, and the second folding part being configured to be folded with a second curvature that is different from the first curvature and defining second holes, and a first adhesion layer between the window and the plate, and defining a first opening that overlaps the first folding part and some of the first holes.