Flexible Display Layer Structure for Neutral-Plane Bending
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Solution Overview
Problem
Display devices experience deformation and damage due to long-term bending or flexing, leading to abnormal images.
Innovation Solution
A display device design that includes a first and second flexible substrate, a display unit, a color conversion layer, a support layer, and adhesive layers, with the display unit positioned on a neutral plane to minimize stress during bending, using symmetric or asymmetric layer configurations to maintain structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the display device is made thin and light, then portability is improved, but reliability deteriorates due to deformation from bending or flexing
Solution Approach 1:
The display device is divided into multiple flexible substrates (first flexible substrate and second flexible substrate) with the display unit positioned between them. This segmentation allows the device to be thin and light while providing structural support through the layered configuration, preventing deformation during bending or flexing.
Solution Approach 2:
The device uses a composite structure combining flexible substrates, adhesive layers, and a support layer. The support layer provides rigidity while the flexible substrates maintain flexibility, creating a composite material system that achieves both lightness and reliability during bending operations.
2Stability of the object's composition
If the display unit is positioned on the neutral plane, then deformation is reduced, but structural complexity increases
Solution Approach 1:
The layer configuration is designed asymmetrically with the display unit positioned on the neutral plane, where stress is minimized during bending. The support layer and adhesive layers are strategically positioned to compensate for the flexibility of the substrates, reducing deformation without requiring complex reinforcement structures.
Solution Approach 2:
Adhesive layers are introduced as intermediaries between the flexible substrates and the display unit, and between the support layer and the flexible substrate. These adhesive layers distribute stress evenly and maintain the display unit on the neutral plane, reducing deformation while adding minimal structural complexity.
3Strength
If adhesive layers are added to bind components, then structural integrity is improved, but manufacturing complexity increases
Solution Approach 1:
Adhesive layers are applied locally at specific interfaces where bonding is needed: between the support layer and the first flexible substrate, and between the second flexible substrate and the protective layer. This localized application provides necessary structural integrity while minimizing manufacturing complexity by avoiding unnecessary adhesive layers throughout the entire structure.
Data Source
AI summary
A display device is provided in the disclosure. The display device includes a first flexible substrate, a second flexible substrate, a display unit, a color conversion layer, a support layer, a first adhesive layer, a protective layer and a second adhesive layer. The second flexible substrate is disposed opposite to the first flexible substrate. The display unit is disposed between the first flexible substrate and the second flexible substrate. The color conversion layer is disposed between the second flexible substrate and the display unit. The support layer is disposed under the first flexible substrate. The first adhesive layer is disposed between the support layer and the first flexible substrate. The protective layer is disposed on the second flexible substrate. The second adhesive layer is disposed between the second flexible substrate and the protective layer.