Foldable Display Bending Protection Layer for Friction Relief
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Solution Overview
Problem
Flexible display devices face issues with component defects due to friction during folding or rolling, leading to reduced durability and reliability.
Innovation Solution
A display device design incorporating a display panel with a bending region, an adhesive layer, a functional layer, and a bending protection layer, where the functional layer is spaced apart from the bending protection layer, and an adhesive layer is in contact with it, along with a method of forming a bending protection layer by curing a resin on slipped surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the functional layer is in direct contact with the bending protection layer, then the structural integrity is improved, but the friction between components during folding increases causing defects
Solution Approach 1:
The patent introduces an adhesive layer as an intermediary between the functional layer and the bending protection layer. This adhesive layer serves as a mediator that reduces direct friction between the functional layer and bending protection layer while maintaining structural integrity through bonding. The adhesive layer allows the components to move relative to each other during folding without direct contact friction, thus preventing defects while preserving strength.
2Stability of the object's composition
If the adhesive layer is positioned to maximize bonding area, then the structural stability is improved, but the flexibility during folding is reduced
Solution Approach 1:
The patent applies local quality by positioning the adhesive layer specifically in the bending region rather than uniformly across the entire display panel. The adhesive layer is localized to the bending region where it provides structural stability during folding, while the rest of the display panel maintains its flexibility. This localized approach allows the adhesive layer to provide stability only where needed during folding operations without compromising the overall flexibility of the display device.
3Reliability
If the bending protection layer is made thicker to enhance protection, then the durability is improved, but the radius of curvature at the bending region is increased
Solution Approach 1:
The patent applies local quality by making the bending protection layer thicker specifically in the bending region rather than uniformly across the entire display panel. The increased thickness is localized to the bending region where it provides enhanced protection and durability, while the rest of the display panel maintains its desired curvature and flexibility. This localized thickening allows the bending protection layer to enhance durability without excessively increasing the radius of curvature at the bending region.
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
Enhances the durability and reliability of the display device by protecting the bending region from damage during folding or rolling.
Implementation Method 1
an adhesive layer disposed on the display panel and overlapping the first region when viewed on a plane
Implementation Method 2
a bending protection layer disposed on the display panel and overlapping the bending region when viewed on a plane
Data Source
AI summary
A display device includes a display panel including a first region, a second region, and a bending region disposed between the first region and the second region and having a predetermined radius of curvature, an adhesive layer disposed on the display panel and overlapping the first region when viewed on a plane, a functional layer disposed on the adhesive layer and overlapping the first region when viewed on a plane; and a bending protection layer disposed on the display panel and overlapping the bending region when viewed on a plane, wherein at least a portion of the adhesive layer is in contact with the bending protection layer, and the functional layer is spaced apart from the bending protection layer, thereby exhibiting increased reliability.