Mesh Pattern Layer for Foldable Display Crease Reduction
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Solution Overview
Problem
Flexible foldable display devices suffer from visibility issues and crease degradation due to repeated folding, which affects their usability and appearance.
Innovation Solution
A display device design incorporating a mesh pattern layer between the display module and joint units, featuring a mesh pattern defined by yarns with specific orientations and openings, which reduces the visibility of wrinkles and joint units while maintaining sufficient adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the display device is folded repeatedly to reduce size, then the device becomes more compact and portable, but the folding region develops creases and wrinkles that degrade appearance and visibility
Solution Approach 1:
A mesh pattern layer is introduced as an intermediary component between the display module and the folding region. This layer acts as a mediator that distributes stress during folding, preventing direct contact and friction between the display module and the folding structure, thereby reducing crease and wrinkle formation while maintaining compact foldability
Solution Approach 2:
The mesh pattern layer utilizes a porous, open-cell structure that allows flexibility and stress distribution. The porous configuration enables the layer to conform to the folding geometry while maintaining structural integrity, effectively reducing visible creases and wrinkles in the folding region
2Reliability
If a solid protective layer is added to prevent wrinkles, then durability improves, but visibility and light transmission are reduced
Solution Approach 1:
The mesh pattern layer employs a porous structure with controlled open cells that allow light transmission while providing mechanical protection. The porosity maintains visibility and light transmission properties, while the mesh structure itself provides the durability and wrinkle prevention functions
Solution Approach 2:
The mesh pattern layer provides localized protection only where needed - in the folding region - while maintaining transparency and light transmission in the display area. The protective function is applied locally to the folding region rather than across the entire display surface
3Reliability
If the mesh pattern layer has small openings for durability, then adhesion is sufficient, but visibility and light transmission are reduced
Solution Approach 1:
The mesh pattern layer parameters (opening size, cell dimension, thickness) are optimized to achieve the right balance. The openings are sized to provide sufficient adhesion area for durability while being large enough to maintain good visibility and light transmission properties
Data Source
AI summary
A display device includes a display module, a plurality of joint units, and a mesh pattern layer. The display module includes a first non-folding region, a second non-folding region, and a folding region disposed between the first non-folding region and the second non-folding region. The plurality of joint units are disposed under the display module, overlapped with the folding region, and sequentially arranged in a first direction. The mesh pattern layer is disposed between the display module and the plurality of joint units and includes a mesh pattern and a plurality of openings defined by the mesh pattern. Therefore, the display device according to an embodiment of the inventive concept may have excellent visibility.