Foldable Display Supporting Plate with Tapered Bending Region Openings
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Solution Overview
Problem
Current foldable display devices suffer from poor flatness and difficulty in assembly due to waviness and creases caused by repeated folding or unfolding, which is exacerbated by incomplete coverage of supporting plates leading to increased production costs and assembly complexity.
Innovation Solution
A foldable display device design featuring a supporting plate with a bending region and non-bending regions, incorporating a dummy bending axis with specific opening arrangements that allow for stress dispersion and extension performance, along with an elastic layer to enhance flatness and assembly ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a metal sheet covering an entire surface of display panel and a supporting plate covering only a non-bending region are respectively attached, then flatness is improved, but assembly difficulty and production costs increase
Solution Approach 1:
The patent combines the metal sheet and supporting plate into a single integrated supporting plate structure. The supporting plate includes a bending region that covers the entire bending area of the display panel and non-bending regions that cover the non-bending areas, eliminating the need for separate metal sheet and supporting plate components.
Solution Approach 2:
The integrated supporting plate serves multiple functions: it provides structural support in non-bending regions, allows controlled bending in the bending region, and maintains flatness across the entire display panel. This single component replaces the multiple separate components (metal sheet + supporting plate) that previously performed these functions.
2Shape
If a metal sheet covering an entire surface of display panel and a supporting plate covering only a non-bending region are respectively attached, then flatness is improved, but production costs increase
Solution Approach 1:
The patent combines the metal sheet and supporting plate into a single integrated supporting plate structure, reducing the number of components that need to be manufactured and assembled. This integration simplifies the manufacturing process and reduces production costs while maintaining the flatness improvement.
3Device complexity
If a supporting plate covering only a non-bending region is used, then assembly is simplified, but flatness deteriorates due to incomplete coverage
Solution Approach 1:
The integrated supporting plate structure combines the benefits of both approaches: it provides complete coverage like the metal sheet while maintaining the simplified assembly of the non-bending region only supporting plate. The bending region is designed to flex with the display panel, making assembly straightforward while ensuring complete coverage for flatness.
4Strength
If the supporting plate is rigid, then structural strength is improved, but stress concentration and creases increase during repeated folding
Solution Approach 1:
The supporting plate is segmented into a bending region and non-bending regions. The bending region includes a dummy bending axis and is provided with openings that allow it to flex during folding, reducing stress concentration. The non-bending regions maintain rigidity for structural strength, creating a composite structure that balances flexibility and strength.
Solution Approach 2:
The bending region of the supporting plate is provided with multiple openings, creating a porous structure. This porous design reduces the mass and stiffness of the bending region, allowing it to flex more easily during folding and unfolding operations, thereby reducing stress concentration and preventing creases while maintaining overall structural integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design reduces stress and misalignment between the supporting plate and display panel, improves flatness, and simplifies assembly by allowing for better extension and recovery of the supporting plate during bending, thereby minimizing creases and waviness.
Implementation Method 1
the bending region is provided with a plurality of openings... a distance between inner walls of both sides of the openings in a direction of the first long axis gradually decreases from both ends to middle of the openings along the direction of the first long axis
Data Source
AI summary
The present invention provides a foldable display device including a front frame, a bottom frame assembly, a display panel, and a supporting plate. The supporting plate includes a bending region, the bending region is provided with a plurality of openings, and the openings include a first long axis and a first short axis. A distance between inner walls of both sides of the openings in a direction of the first long axis gradually decreases from both ends of the openings to middle along the direction of the first long axis, thereby improving extension performance and ability to restore deformation, and reducing a risk of inner film layers of the foldable display device from being separated.