Adhesion Control Layer for Display Scratch Resistance and Bubble Removal
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Solution Overview
Problem
Conventional display devices face issues with scratch resistance, air bubble formation, and difficult attachment/detachment, especially on curved or flexible surfaces, leading to increased costs and electronic waste due to manual reproduction processes.
Innovation Solution
A display device incorporating an adhesion control layer with a flat layer and a pattern layer, where the adhesive forces of the flat and pattern layers differ, allowing for adjustable attachment and detachment without air bubbles, regardless of surface curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective sheet with strong adhesive force is used to prevent lifting and air bubbles on curved surfaces, then attachment stability is improved, but the protective sheet becomes difficult to detach and reattach, and air bubble removal becomes difficult
Solution Approach 1:
The adhesion control layer is divided into multiple regions with different adhesive forces: a first region with stronger adhesive force to prevent lifting at edges, and a second region with weaker adhesive force to allow easy detachment and air bubble removal. This spatial segmentation of adhesive properties resolves the contradiction between attachment stability and detachability.
Solution Approach 2:
Different regions of the adhesion control layer are assigned different adhesive qualities tailored to their specific functional requirements. The first region (peripheral areas) has enhanced adhesion for stability, while the second region (central areas) has reduced adhesion for ease of operation. This local differentiation simultaneously achieves both attachment stability and operational ease.
2Ease of operation
If a protective sheet with low adhesive force is used to enable easy detachment, then detachability is improved, but lifting and air bubbles occur on curved surfaces
Solution Approach 1:
The adhesion control layer is divided into multiple regions with different adhesive forces: a first region with stronger adhesive force to prevent lifting at edges, and a second region with weaker adhesive force to allow easy detachment and air bubble removal. This spatial segmentation of adhesive properties resolves the contradiction between attachment stability and detachability.
Solution Approach 2:
Different regions of the adhesion control layer are assigned different adhesive qualities tailored to their specific functional requirements. The first region (peripheral areas) has enhanced adhesion for stability, while the second region (central areas) has reduced adhesion for ease of operation. This local differentiation simultaneously achieves both attachment stability and operational ease.
3Object-affected harmful factors
If a conventional protective sheet is used on flexible display devices, then basic protection is provided, but folding portions and edged portions experience lifting and air bubble generation
Solution Approach 1:
The adhesion control layer implements spatially varying adhesive properties where peripheral regions (first region) have stronger adhesion to prevent lifting at edges and folding portions, while central regions (second region) maintain adequate adhesion for protection. This local quality differentiation addresses the specific vulnerability of curved and flexible surfaces.
Solution Approach 2:
The adhesion control layer is divided into multiple regions with different adhesive forces: a first region with stronger adhesive force to prevent lifting at edges, and a second region with weaker adhesive force to allow easy detachment and air bubble removal. This spatial segmentation of adhesive properties resolves the contradiction between attachment stability and detachability.
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 excellent scratch resistance, easy air bubble discharge, and stable attachment/detachment on both flat and curved surfaces, reducing electronic waste and manual reproduction costs.
Implementation Method 1
adhesive forces of the flat layer and the pattern layer with respect to the detachable layer are different from each other
Data Source
AI summary
Provided is a display device using an adhesion control layer, which has excellent scratch-resistance, easily discharges air bubbles, allows proper attachment and detachment, and is stably attached regardless of whether a surface is flat or curved. The device comprises: an adhesive member; an adherend member to which the adhesive member is attached; a detachable layer disposed on one of the adhesive member and the adherend member; and an adhesion control layer to which the detachable layer is detachably attached and which is disposed on one of the adhesive member and the adherend member. The adhesion control layer is disposed on one surface of one of the adhesive member and the adherend member and includes a flat layer covering the whole of the surface and a pattern layer disposed on the flat layer, and the flat layer and the pattern layer have different adhesive forces with respect to the detachable layer.