Segmented Rigid Support Islands for Flexible Display Bending
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Solution Overview
Problem
Flexible display panels with rigid support layers face issues with bending performance, supporting performance, and inconsistent deformation when bent, leading to peeling and potential breakage due to high rigidity and poor support effects.
Innovation Solution
A display panel design featuring a rigid support layer with a patterned part containing grooves and discrete support islands on the backside, where the surfaces of the islands are flush with the smooth part, and optionally filled with a material of lower elastic modulus, such as hot melt glue, to enhance bending and supporting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rigid support layer is made too thin, then the bending performance is improved, but the supporting performance deteriorates
Solution Approach 1:
The rigid support layer is segmented into multiple discrete support islands distributed across the bending part, rather than being a continuous thin layer. This segmentation allows the layer to be thin overall for flexibility while maintaining localized support strength through the distributed islands, resolving the contradiction between thinness for bending and sufficient support strength.
Solution Approach 2:
The support islands are strategically positioned at specific locations within the bending part where support is most needed. By concentrating rigidity at these local points rather than uniformly across the entire layer, the design achieves sufficient supporting performance in critical areas while maintaining overall thinness for good bending performance.
2Strength
If the rigid support layer is made too thick, then the supporting performance is improved, but the bending performance deteriorates
Solution Approach 1:
Instead of using a single thick continuous layer, the design segments the support function into multiple discrete islands. This allows the overall layer thickness to remain thin for good bending performance while the collective mass of the islands provides sufficient supporting performance, effectively decoupling the two requirements.
Solution Approach 2:
The thick support layer approach is replaced by localized support islands positioned precisely where structural support is needed. This local concentration of material provides the necessary supporting performance without requiring the entire layer to be thick, thereby maintaining excellent bending performance.
3Strength
If the rigid support layer has high rigidity, then the supporting performance is improved, but the bending performance deteriorates due to inconsistent deformation
Solution Approach 1:
The continuous rigid structure is segmented into discrete support islands, creating a more adaptable structure. The grooves between islands allow for inconsistent deformation and accommodate bending movements, enabling the high-rigidity material to bend flexibly without causing peeling or breakage, thus resolving the contradiction between rigidity and bending adaptability.
Solution Approach 2:
The grooves act as intermediary elements between the rigid support islands and the flexible film layers. These grooves accommodate deformation and stress, mediating between the high rigidity of the support islands and the flexibility requirements of the bending operation, preventing peeling and breakage.
4Ease of operation
If the rigid support layer is made thinner, then the bending performance is improved, but the peeling tendency increases due to inconsistent deformation
Solution Approach 1:
The segmented island structure with grooves in between provides both thinness for bending performance and structural features that prevent peeling. The grooves act as stress-relief zones that accommodate deformation, preventing the formation of peeling forces while maintaining the thin overall profile needed for flexibility.
Solution Approach 2:
The grooves serve as intermediary stress-relief zones between the rigid support islands and the flexible film layers. These grooves absorb deformation stresses and prevent stress concentration at the interfaces, thereby preventing peeling while allowing the thin support layer to maintain good bending performance.
Data Source
AI summary
A display panel and a display terminal are provided. A rigid support layer includes a patterned part corresponding to a bending part, and a smooth part corresponding to a non-bending part. The patterned part includes at least one groove and multiple discrete support islands disposed in the groove. Surfaces of the support islands are flush with a surface of the smooth part. Disposing the discrete support islands in the groove can concurrently provide the excellent bending performance and the excellent supporting performance for the rigid support layer.