Flexible Laminated Structure with Adhesive Segmentation
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Solution Overview
Problem
Conventional flexible displays experience peeling issues due to inferior adhesion between the pressure sensitive adhesive layer and the resin layer, leading to reduced structural reliability when bent.
Innovation Solution
A flexible laminated structure is designed with a first protection layer, a second protection layer having openings that expose the first protection layer, and a flexible material layer that directly contacts the first protection layer, ensuring greater adhesion between the flexible material layer and the first protection layer than between the second protection layer and the first protection layer, thereby dispersing tensile forces and reducing peeling effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pressure sensitive adhesive layer directly contacts the resin layer, then the manufacturing process is simple, but the adhesion is inferior and peeling occurs during bending
Solution Approach 1:
The invention segments the contact interface by introducing a second protection layer with openings that expose portions of the first protection layer. This creates multiple discrete contact points between the flexible material layer and the first protection layer, rather than a continuous contact interface. The segmentation allows the structure to maintain adhesion reliability while managing stress distribution during bending.
Solution Approach 2:
The second protection layer is designed with a specific pattern of openings that creates local variations in adhesion properties. The openings are strategically positioned to expose high-adhesion areas of the first protection layer while the second protection layer provides coverage in other areas. This local quality differentiation optimizes both adhesion reliability and manufacturing ease.
2Reliability
If the flexible material layer directly contacts the first protection layer, then adhesion is improved, but the structure becomes more complex
Solution Approach 1:
The second protection layer acts as an intermediary element between the flexible material layer and the first protection layer. Rather than allowing direct contact, it mediates the interaction through its opening pattern, providing both protection and controlled adhesion. This intermediary approach resolves the complexity issue by using a single additional layer that performs multiple functions.
Solution Approach 2:
The second protection layer serves multiple functions simultaneously: it provides mechanical protection, controls adhesion through its opening pattern, and facilitates stress distribution during bending. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in device complexity while achieving improved adhesion reliability.
3Strength
If the adhesion between second protection layer and first protection layer is strong, then structural strength is improved, but peeling still occurs during bending
Solution Approach 1:
By segmenting the contact interface through openings in the second protection layer, the invention creates multiple small contact points rather than one large continuous interface. This segmentation prevents peeling from propagating across the entire interface, as the discrete contact points act as independent stress distribution centers, thereby improving peeling resistance while maintaining overall structural strength.
Solution Approach 2:
The second protection layer functions as a porous structure with openings that expose the first protection layer. This porous configuration allows the flexible material layer to contact and bond with the first protection layer at multiple points, creating a more robust adhesion system that resists peeling forces during bending while maintaining 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 structure enhances the structural reliability of flexible displays by reducing peeling effects and improving structural strength during bending, ensuring better adhesion and dispersion of tensile forces.
Implementation Method 1
The adhesion between the flexible material layer and the first protection layer is greater than the adhesion between the second protection layer and the first protection layer
Data Source
AI summary
A flexible laminated structure includes a first protection layer, a second protection layer directly contacting the first protection layer and a flexible material layer. The second protection layer having a plurality of openings, which are used to expose a portion of the first protection layer. The flexible material layer is disposed on the second protection layer and extends into the openings, and directly contacts the first protection layer exposed by the openings. An adhesion between the flexible material layer and the first protection layer is greater than an adhesion between the second protection layer and the first protection layer.