Flexible Display Optical Clear Adhesive Layer Design
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Solution Overview
Problem
Current flexible display apparatuses face challenges with the slow recovery of optical clear adhesive deformation when transitioning between folding and spreading states, leading to unsatisfactory performance due to the thickness and deformation characteristics of optical clear adhesives.
Innovation Solution
A flexible display apparatus design featuring a first optical clear adhesive layer with transparent spacers that divide it into thinner and thicker parts, allowing for faster deformation recovery and improved adhesion, respectively, to address the deformation issues during folding and spreading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the thickness of the optical clear adhesive is reduced to shorten recovery time, then the recovery time is improved, but the adhesive cannot effectively fill the thickness difference between different laminates and bubbles may occur
Solution Approach 1:
The optical clear adhesive layer is designed with non-uniform thickness: a first thickness in the first area (folding area) and a second thickness greater than the first thickness in the second area (non-folding area). This local quality variation allows the adhesive to have different properties in different regions, enabling fast recovery in the folding area while ensuring adequate adhesion and bubble prevention in the non-folding area.
Solution Approach 2:
The optical clear adhesive layer is segmented into two distinct regions with different thicknesses: a first region corresponding to the folding area and a second region corresponding to the non-folding area. This segmentation allows each region to be optimized independently for its specific functional requirements.
2Strength
If the thickness of the optical clear adhesive is increased to improve adhesion, then the adhesion is improved, but the recovery time for deformation increases
Solution Approach 1:
The optical clear adhesive layer is designed with non-uniform thickness: a first thickness in the first area (folding area) and a second thickness greater than the first thickness in the second area (non-folding area). This local quality variation allows the adhesive to have different properties in different regions, enabling fast recovery in the folding area while ensuring adequate adhesion in the non-folding area.
Solution Approach 2:
The optical clear adhesive layer is segmented into two distinct regions with different thicknesses: a first region corresponding to the folding area and a second region corresponding to the non-folding area. This segmentation allows each region to be optimized independently for its specific functional requirements.
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 enables rapid recovery of deformation in the adhesive layer during folding and spreading, preventing stress accumulation and bubble formation, thus enhancing the operational flexibility and reliability of flexible displays.
Implementation Method 1
the optical clear adhesive is a glue material easy to occur deformation. For the flexible display apparatus, the product needs to be folded and spread frequently. The optical clear adhesive would be squeezed and deform when the product is operated form the spreading state to the folding state
Data Source
AI summary
A flexible display apparatus and a fabricating method thereof are provided. The flexible display apparatus comprises a first substrate and a first optical clear adhesive layer. The first optical clear adhesive layer is disposed on one side of the first substrate. The first optical clear adhesive layer has a pair of transparent spacers. The transparent spacers are applied to divide the first optical clear adhesive layer into a first part and a second part. The first part is located between the pair of the transparent spacers, and the second part is located at outside of the pair of the transparent spacers. A thickness of the first part is smaller than a thickness of the second part. A vertical projection of the first part on the first substrate is forming a first area. When the flexible display apparatus is in a folding state, the first area is bent.