Segmented Adhesive Layer for Flexible Display Durability
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Solution Overview
Problem
Flexible displays in electronic devices face issues with cumulative fatigue and impact resistance due to frequent shape deformation, leading to malfunction and damage from external impacts.
Innovation Solution
A flexible display configuration using adhesive members with different attributes, where a harder adhesive is applied in non-deformable areas and a softer adhesive in foldable areas, ensuring excellent deformation characteristics and impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display is designed to allow frequent folding and shape deformation, then adaptability and versatility are improved, but reliability deteriorates due to cumulative fatigue causing malfunction
Solution Approach 1:
The adhesive layer is segmented into multiple regions with different hardness characteristics. The first adhesive member with first hardness is applied to a first region, while the second adhesive member with second hardness is applied to a second region. This segmentation allows each region to provide optimized adhesive properties suitable for its specific functional requirements, thereby improving overall reliability while maintaining flexibility.
Solution Approach 2:
Different regions of the adhesive layer are assigned different local qualities in terms of hardness. The first adhesive member has a first hardness value suitable for one region, while the second adhesive member has a second hardness value suitable for another region. This local quality differentiation enables the adhesive layer to simultaneously provide both flexibility for deformation and reliability for fatigue resistance in different areas.
2Ease of operation
If a flexible display uses a softer adhesive to maintain deformation characteristics, then ease of operation is improved, but strength deteriorates due to reduced impact resistance
Solution Approach 1:
The adhesive layer is divided into multiple segments with different hardness properties. The first adhesive member with first hardness is disposed in a first region, and the second adhesive member with second hardness is disposed in a second region. This segmentation enables the adhesive layer to provide both softness for easy folding and hardness for impact resistance in different areas.
Solution Approach 2:
The adhesive layer exhibits local quality variations where different regions have different hardness characteristics. The first adhesive member provides a first hardness suitable for one functional region, while the second adhesive member provides a second hardness suitable for another functional region, thereby simultaneously achieving ease of operation and strength.
3Strength
If a rigid adhesive is used to improve impact resistance, then strength is improved, but ease of operation deteriorates due to poor deformation characteristics
Solution Approach 1:
The adhesive layer is segmented into multiple regions with different hardness characteristics. The first adhesive member with first hardness is applied to a first region, while the second adhesive member with second hardness is applied to a second region. This segmentation allows the adhesive layer to provide both rigidity for impact resistance and flexibility for folding in different areas.
Solution Approach 2:
Different regions of the adhesive layer are assigned different local qualities in terms of hardness. The first adhesive member has a first hardness value suitable for one region, while the second adhesive member has a second hardness value suitable for another region. This local quality differentiation enables the adhesive layer to simultaneously provide both strength and ease of operation.
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 provides enhanced durability and resistance to external impacts while maintaining satisfactory folding features, effectively addressing the fatigue and impact issues in flexible displays.
Implementation Method 1
a third layer which is formed between the first layer and the second layer, the third layer including an adhesive member, comprising: a first adhesive member having a first attribute which is disposed in a display area of the third layer configured not to be deformed
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
According to various embodiments, a display or an electronic device comprising the same comprises: a first layer comprising a first member; a second layer which is formed beneath the first layer, the second layer comprising a second member; and a third layer which is formed between the first layer and the second layer, the third layer comprising an adhesive member. The third layer has a first area which may be formed by using a first adhesive member having a first attribute, and a second which may be formed by using a second adhesive member having a second attribute. In addition, other various embodiments are also possible.