Foldable Display Support Composite Plate Stress Reduction
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Solution Overview
Problem
Current dynamic foldable module screens using stainless steel as support layers require high material purity and are prone to cracking and stress during bending due to their rigidity.
Innovation Solution
A support composite plate with a metal support layer, a rubber buffer layer that fills openings in the support layer, and a polymethylmethacrylate-based polymer hardened layer, which reduces stress and improves bendability by completely filling the support layer openings and overlapping with it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If stainless steel is used as the support layer, then stiffness and bending resistance are improved, but the material is prone to cracking and stress during bending
Solution Approach 1:
The support layer is segmented by defining openings in the bending areas, dividing the continuous metal structure into separate regions. This segmentation reduces stress concentration during bending, preventing cracks while maintaining stiffness in non-bending areas.
Solution Approach 2:
Different regions of the support layer are given different properties: non-bending areas maintain full metal coverage for stiffness, while bending areas have openings to reduce stress. The buffer layer is selectively placed only in bending areas to provide localized stress relief.
2Strength
If stainless steel support layer is used, then structural support is improved, but high material purity requirements and manufacturing complexity increase
Solution Approach 1:
The invention uses a composite structure combining metal support layer with buffer layer and hardened layer. This composite approach maintains structural support while using more readily available materials with less stringent purity requirements, simplifying manufacturing.
3Adaptability or versatility
If the buffer layer completely fills the opening and overlaps the support layer, then bendability is improved, but device complexity increases
Solution Approach 1:
The buffer layer acts as an intermediary element between the support layer and the display panel. It completely fills the openings and overlaps the support layer to provide stress relief and improve bendability, while the hardened layer on top protects this buffer structure.
Solution Approach 2:
The buffer layer uses a rubber material that provides flexibility and compliance, allowing the structure to bend without cracking. This thin film approach improves bendability while maintaining a relatively simple overall structure.
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 solution effectively reduces laminating processes, enhances the bendability of display panels, improves yield, and decreases costs by preventing cracking and stress issues in dynamic foldable screens.
Implementation Method 1
the buffer layer includes a rubber material... the buffer layer is disposed in the bending area and fills the opening... preventing cracking and stress when bending the support composite plate
Data Source
AI summary
A support composite plate, a manufacturing method thereof, and a display module are provided. The support composite plate includes at least one bending area and non-bending areas positioned on both sides of the bending area, and includes a support layer, a buffer layer, and a hardened layer. Wherein, the support layer is defined with at least one opening corresponding to the bending area, the buffer layer is disposed in the bending area and fills the opening, the hardened layer is disposed on the buffer layer, and the buffer layer overlaps at least a part of the support layer.