Surface-Modified Adhesive Area for Display Device Coupling
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Solution Overview
Problem
Existing display devices face challenges in achieving consistent coupling strength between different areas of the display module and external members due to variations in residual adhesive material distribution, leading to manufacturing defects and reduced reliability.
Innovation Solution
A display device design with distinct adhesive areas, where the second area surrounding the first area has a greater coupling strength, utilizing different adhesive materials for the adhesive layer and residual adhesive material, and a surface-modification process involving plasma treatment and surfactant application to enhance hydrophilic properties and cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform adhesive layer is applied across the entire display module surface, then the manufacturing process is simple, but the coupling strength varies between different areas due to residual adhesive material distribution
Solution Approach 1:
The patent applies different adhesive materials to different areas of the display module. The first area uses a first adhesive material while the second area uses a second adhesive material, creating local quality differences to achieve consistent coupling strength across varying residual adhesive conditions.
Solution Approach 2:
The patent changes the adhesive material parameter across different regions. By selecting different adhesive materials with different properties for the first and second areas, the system compensates for residual adhesive variations to maintain uniform coupling strength.
2Stability of the object's composition
If the same adhesive material is used throughout the display module, then the adhesive layer is homogeneous and easy to manufacture, but coupling strength cannot be optimized for different areas with varying residual adhesive amounts
Solution Approach 1:
The patent introduces local quality variation by applying different adhesive materials to the first and second areas. This allows each area to have optimized adhesive properties matched to its specific residual adhesive conditions, improving coupling reliability while maintaining overall system stability.
Solution Approach 2:
The patent uses composite adhesive materials with different properties in different regions. The first adhesive material and second adhesive material form a composite adhesive layer structure that optimizes coupling strength for each area's specific requirements.
3Device complexity
If residual adhesive material is present on the display module surface, then the adhesive layer can be simplified, but manufacturing defects increase due to inconsistent coupling strength
Solution Approach 1:
The patent changes the adhesive material parameter based on the residual adhesive conditions in different areas. This allows the system to maintain reliable coupling strength while using a simplified adhesive layer structure that accounts for residual material variations.
Solution Approach 2:
The patent converts the harmful effect of residual adhesive material into a beneficial feature by using it to define different adhesive regions. The residual adhesive distribution pattern is utilized to determine where different adhesive materials should be applied, turning a manufacturing defect into a design parameter.
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 ensures a higher coupling strength between the display module and external members, reduces manufacturing defects, and improves the overall reliability by optimizing adhesive distribution and cleaning processes.
Implementation Method 1
surface-modifying an outer area of a first display module of the plurality of display modules exposed by a corresponding cell protective film among the cell protective films
Implementation Method 2
surface-modification process involving plasma treatment and surfactant application to enhance hydrophilic properties and cleaning efficiency
Data Source
AI summary
A display device includes: a display module including a first area and a second area at least partially surrounding the first area in a plan view; an external member disposed on the display module; and an adhesive layer configured to couple the display module to the external member, wherein a coupling strength between the second area and the adhesive layer is greater than a coupling strength between the first area and the adhesive layer.