Foldable Display Panel Opening Layout for Arching Resistance
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Solution Overview
Problem
Out-folded display screens in mobile phones are prone to arching and deformation with repeated bending, leading to permanent bulging or fracture due to stress concentration at the bending areas.
Innovation Solution
A display panel design featuring a support layer with strategically arranged first openings, including hole buffer sub-parts and hole connection sub-parts, which are aligned to distribute stress and reduce torsional concentration, thereby enhancing the panel's bending performance and reducing the likelihood of arching and fracture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a continuous support layer is used in out-folded display screens, then the support layer provides initial structural strength, but stress concentration occurs at bending areas leading to arching and fracture
Solution Approach 1:
The continuous support layer is segmented into multiple discrete opening groups distributed across the bending area. Each opening group contains multiple openings that divide the stress distribution, preventing stress concentration that would occur in a continuous structure. This segmentation allows the support layer to maintain overall strength while reducing localized stress buildup during repeated bending cycles.
Solution Approach 2:
The support layer structure is made non-uniform by creating opening groups with specific patterns at the bending area, while maintaining a continuous structure in non-bending areas. The opening groups have varying densities and configurations tailored to the local stress distribution characteristics of the bending region, providing enhanced stress relief exactly where needed without compromising structural integrity elsewhere.
2Stability of the object's composition
If the support layer is made more rigid to prevent deformation, then structural stability improves, but the panel becomes more prone to fracture during repeated bending
Solution Approach 1:
The support layer transitions from a static continuous structure to a dynamic segmented structure with opening groups that can adapt to bending stresses. The openings allow the material to flex and deform elastically during bending cycles, dissipating energy that would otherwise accumulate as stress. This dynamic response maintains structural stability while preventing fracture through controlled deformation.
Data Source
AI summary
The disclosure provides a display panel and a display device. A first opening includes a hole body part and hole end parts connected to two opposite ends of the hole body part, respectively. The hole body part includes a hole buffer sub-part and a hole connection sub-part connected between the hole end parts and the hole buffer sub-part. A width of the hole connection sub-part is less than a width of the hole end part and a width of the hole buffer sub-part. The hole buffer sub-part in one of two adjacent first opening groups and a side of the hole connection sub-part close to a corresponding one of the hole end parts in the other one of the two adjacent first opening groups are disposed in alignment.