Foldable Display Protective Component With Variable Bending Rigidity
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Solution Overview
Problem
In foldable electronic devices, the excessive bending rigidity of protective components can lead to insufficient screen accommodating space, causing creasing or fracturing of flexible screens due to inadequate deformation during folding.
Innovation Solution
A display assembly with a protective component featuring a first region with lower deformation and higher bending rigidity than adjacent regions, combined with strategically placed recessed portions to manage stress distribution, ensuring sufficient screen accommodation and reducing the risk of layer separation and fracturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bending rigidity of the protective component is increased to protect the flexible screen, then the protective strength is improved, but the deformation amount during bending becomes excessively small, causing the screen accommodating space radius to be excessively small
Solution Approach 1:
The protective component is divided into different regions with different bending rigidities: the first region (non-bending area) has higher bending rigidity to protect the flexible screen, while the second region (bending area) has lower bending rigidity to provide sufficient deformation and screen accommodating space. This local differentiation resolves the contradiction between protective strength and accommodating space volume.
2Strength
If the bending rigidity of the protective component is excessively large, then the protective capability is improved, but the flexible screen is pulled or squeezed at the folded position, causing creasing or fracturing
Solution Approach 1:
Different regions of the protective component are assigned different bending rigidities: the first region maintains high rigidity for protection, while the second region has reduced rigidity to allow controlled deformation during folding. This prevents excessive stress concentration on the flexible screen at folded positions, avoiding creasing and fracturing while maintaining overall protective capability.
3Volume of moving object
If the deformation amount of the protective component during bending is increased to provide sufficient screen accommodating space, then the screen accommodation is improved, but the bending rigidity becomes excessively small, reducing protective effectiveness
Solution Approach 1:
The protective component employs spatially varying bending rigidity: the second region (bending area) has lower bending rigidity to enable large deformation and provide sufficient screen accommodating space, while the first region (non-bending area) maintains high bending rigidity to ensure protective effectiveness. This local differentiation allows both large deformation for accommodation and high rigidity for protection in different locations.
Data Source
AI summary
This application relates to a display assembly and a foldable electronic device. The display assembly includes: a flexible screen; and a protective component connected to the flexible screen in a first direction, where a bending region of the protective component includes a first region and second regions located on two sides of the first region in a second direction; and when the display assembly is bent, the first region has a smaller average deformation amount than each second region in the second direction. When the display assembly is in a folded state, the bending region of the protective component forms a screen accommodating space for accommodating a folded portion of the flexible screen.