Foldable Device Adhesive Layer UV Ink Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The adhesive layer in foldable electronic devices, when not disposed on the folding area, creates a visible step and can lead to wrinkles upon repeated folding, and when disposed on the folding area, foreign matter like dust adheres to it, causing issues.
Innovation Solution
Incorporating an adhesion prevention part on the adhesive layer within the folding area, formed by printing an ink material and curing it with UV light or applying a coating material/film, which reduces the adhesive layer's thickness and prevents foreign matter adherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the adhesive layer is disposed on the folding area to prevent step formation, then the visibility of the flexure portion is reduced, but foreign matter such as dust adheres to the adhesive layer
Solution Approach 1:
The adhesive layer is divided into two distinct regions: a first adhesive layer disposed on the non-folding area and a second adhesive layer disposed on the folding area. This segmentation allows each region to serve its specific function - the first adhesive layer provides strong bonding while the second adhesive layer (with lower adhesion force) prevents foreign matter adhesion during folding operations.
Solution Approach 2:
Different adhesion properties are applied to different locations of the adhesive layer. The first adhesive layer has a first adhesion force optimized for bonding the module layer to the bracket, while the second adhesive layer has a second adhesion force specifically designed to prevent dust and foreign matter from adhering during the folding process. This local differentiation resolves the contradiction between maintaining shape and preventing foreign matter adhesion.
2Object-affected harmful factors
If the adhesive layer is not disposed on the folding area to prevent foreign matter adhesion, then foreign matter cannot adhere to the adhesive layer, but a step is formed causing visible flexure portion
Solution Approach 1:
The adhesive layer is segmented into two functional regions: the first adhesive layer on the non-folding area provides strong bonding, while the second adhesive layer on the folding area maintains surface continuity to prevent step formation. This segmentation allows the folding area to have both adhesive coverage and foreign matter resistance through the specialized second adhesive layer.
Solution Approach 2:
The second adhesive layer disposed on the folding area has specifically tailored properties - it maintains the surface profile to eliminate visible steps during folding, while its reduced adhesion force prevents foreign matter from adhering. This local quality differentiation simultaneously addresses both the shape maintenance and foreign matter prevention requirements.
3Shape
If a step compensation layer is disposed on the folding area to prevent step formation, then the step is compensated, but repeated folding causes wrinkles on the folding area
Solution Approach 1:
The second adhesive layer is designed as a thin, compliant layer that can accommodate repeated folding without causing damage. Rather than using a rigid step compensation layer that creates wrinkles, this adhesive layer flexes with the folding motion, providing step compensation while maintaining reliability over repeated use cycles.
Solution Approach 2:
The adhesion force parameter of the second adhesive layer is specifically adjusted to be lower than the first adhesive layer. This parameter change allows the layer to provide smooth surface continuity for step compensation while its reduced adhesion prevents the formation of wrinkles and damage during repeated folding operations.
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
This solution minimizes the formation of visible steps, prevents wrinkles during repeated folding, and effectively prevents foreign matter from adhering to the adhesive layer, enhancing the device's durability and cleanliness.
Implementation Method 1
the adhesion prevention part being formed by printing an ink material and thereafter curing the ink material with UV light
Data Source
AI summary
Disclosed is an electronic device comprising: a display, a buffer layer disposed on one surface of the display, an adhesive layer disposed on one surface of the buffer layer, and an adhesion prevention part disposed on a portion of one surface of the adhesive layer, the part corresponding to a folding area where the foldable electronic device is folded, wherein the adhesion prevention part is formed by printing an ink material and curing the ink material by an ultraviolet ray. In addition, various embodiments understood through the specification are possible.