Flexible Cover Plate With Flow Layer For Bending
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Solution Overview
Problem
Existing flexible cover plates for foldable intelligent terminal products lack sufficient rigidity and repeated bending capability, leading to potential damage and deformation when bent.
Innovation Solution
A flexible cover plate design comprising a first and second cover-plate layer with a flow layer in between, containing a fluid capable of flowing and a transparent nano-glass material, and support bumps to enhance rigidity and bending capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the thickness of the PI thin film is reduced to less than 0.1 mm to achieve good repeated bending capability, then the repeated bending capability is improved, but the rigidity and protective capability deteriorate
Solution Approach 1:
The patent uses a composite structure consisting of multiple layers: a flexible base material layer (PI thin film with thickness 0.05-0.5 mm), a flow layer (0.1-0.2 mm thickness) containing fluid and transparent nano-glass material, and support bumps (0.05-0.1 mm height) attached to the inner side of the cover plate. This composite structure combines the flexibility of the thin PI film with the rigidity and impact buffering provided by the flow layer and support bumps, resolving the contradiction between repeated bending capability and rigidity
Solution Approach 2:
The patent incorporates a flow layer containing fluid capable of flowing (such as silicone oil or other viscous fluids) that can move and redistribute under external forces. When impact occurs, the fluid flows to absorb and dissipate energy, providing dynamic impact buffering while maintaining the thin overall structure for repeated bending capability
2Duration of action of moving object
If the thickness of the cover plate is reduced to enable repeated bending, then the repeated bending capability is improved, but the impact protection capability deteriorates
Solution Approach 1:
The patent incorporates a flow layer containing viscous fluid and transparent nano-glass material that serves as a pre-positioned cushioning mechanism. Before impact occurs, the flow layer is already in place to absorb and dissipate impact energy through fluid flow and material deformation, protecting the flexible module from damage while maintaining the thin structure needed for repeated bending
Solution Approach 2:
The patent changes the physical parameters of the cover plate structure by using a multi-layer composition with specific thickness ranges: the flexible base material layer (0.05-0.5 mm), flow layer (0.1-0.2 mm), and support bumps (0.05-0.1 mm height). These parameter optimizations enable the cover plate to achieve both repeated bending capability and impact protection simultaneously
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 allows for repeated bending without cracking or deformation, provides impact buffering, and enhances overall rigidity, protecting the flexible module from damage.
Implementation Method 1
When the flexible cover plate is bent, the fluid in the flow layer that is sealed between the first cover-plate layer and the second cover-plate layer flows toward two sides of the flexible cover plate, to reduce a thickness at a bent part
Implementation Method 2
The transparent nano-glass material that accounts for a specific volume ratio of the filling volume of the fluid is added to the flow layer, so that the flow layer is gel-like. When the flexible cover plate is bent, flow resistance of the fluid in the flow layer is increased to some extent, thereby avoiding problems such as cracks and deformations at a bent part
Implementation Method 3
the flow layer can effectively absorb energy, thereby effectively reducing impact against the flexible module
Data Source
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AI summary
A flexible cover plate, a flexible display apparatus, and a flexible terminal product are provided, to make the flexible cover plate feature a repeated bending capability and sufficient rigidity. The flexible cover plate (2001) includes a first cover-plate layer (11), a second cover-plate layer (12), and a flow layer (13). The flow layer (13) is enclosed between the first cover-plate layer (11) and the second cover-plate layer (12) by using a transparent sealing material. The first cover-plate layer (11) and the second cover-plate layer (12) each have a thickness ranging from 0.05 mm to 0.5 mm, and the flow layer has a thickness ranging from 0.1 mm to 0.2 mm. At least one first support bump (15) is attached to an inner side of the first cover-plate layer (11), and at least one second support bump (16) is attached to an inner side of the second cover-plate layer (12).