Supporting Plate Opening Density for Foldable Screen Bending
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Solution Overview
Problem
The inability to control bending shapes in water drop-shaped foldable screens leads to adhesive layer peeling at the border between internally and externally bending regions, affecting the reliability of these screens.
Innovation Solution
A supporting plate with a bending region featuring semi-bending regions with varying distribution densities of openings, where the internally bending region has a higher distribution density than the externally bending region, to control bending shapes and reduce adhesive layer peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a uniform hole size design is adopted in the bending regions of the supporting plate, then the screen can be easily folded, but the bending shape cannot be controlled, causing adhesive layer peeling at the border between internally and externally bending regions
Solution Approach 1:
The patent applies local quality by varying the distribution density of openings in different regions of the bending area. The internally bending region has a first distribution density while the externally bending region has a second distribution density, creating region-specific properties that control bending shape and prevent adhesive peeling while maintaining foldability
2Reliability
If the distribution density of openings is varied between internally and externally bending regions, then adhesive layer peeling is reduced, but the device complexity increases
Solution Approach 1:
The patent segments the bending region into distinct zones (internally bending region and externally bending region) with different opening distribution densities. This segmentation allows independent optimization of each region to control bending behavior and prevent adhesive peeling, while the segmented structure itself provides a systematic approach that manages complexity
Data Source
AI summary
A supporting plate and a foldable display device are provided. The supporting plate includes at least one bending region and non-bending regions. The bending region includes two semi-bending regions bent symmetrically along a bending axis. Any of the semi-bending regions includes an internally bending region and an externally bending region. The internally bending region is located on an end away from the non-bending regions. The externally bending region is located on an end close to the non-bending regions and has a bending direction opposite to the internally bending region. The semi-bending regions include a plurality of openings spaced apart. A distribution density of the openings in the internally bending region is greater than a distribution density of the openings in the externally bending region.