Flexible Display Touch Mesh Structure to Prevent Bending Cracks
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Solution Overview
Problem
Current flexible display devices lack the necessary flexibility to conform to curved or bent surfaces, limiting their application in various electronic devices that require shape adaptability.
Innovation Solution
A flexible display device design incorporating a touch screen with specific conductive patterns, insulating layers, and color filters, which includes a noise shielding conductive layer and a black matrix to enhance flexibility and reduce stress on components, allowing the device to be bent without cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is made flexible to accommodate curved or rollable forms, then shape adaptability is improved, but structural integrity and resistance to cracking deteriorate
Solution Approach 1:
The display device is divided into multiple functional layers including display panel, touch screen, and protective layers. Each layer is independently designed and optimized for flexibility while maintaining overall structural integrity. The segmentation allows each component to accommodate bending stresses without compromising the entire structure.
Solution Approach 2:
The patent employs composite material structures combining flexible substrates with rigid functional layers. The display panel includes flexible substrates, transparent conductive layers, color filter layers, and protective encapsulation layers arranged in a composite configuration that provides both flexibility and structural strength.
2Shape
If the display device is bent to achieve curved or rollable formats, then flexibility is improved, but tensile-compressive stress and cracking risk worsen
Solution Approach 1:
Different regions of the display device are designed with different mechanical properties. Flexible regions allow bending while rigid regions maintain structural stability. The local quality variation enables the device to accommodate bending stresses without developing cracks in critical areas.
Solution Approach 2:
Protective layers and stress-distributing structural designs are incorporated in advance to cushion against bending stresses. The encapsulation layers and flexible substrate design pre-compensate for tensile-compressive stresses that develop during bending, preventing crack formation.
3Ease of operation
If the touch screen includes multiple conductive patterns and insulating layers, then touch sensitivity is improved, but device complexity increases
Solution Approach 1:
Multiple functional layers including conductive patterns, insulating layers, color filters, and protective layers are merged into an integrated stacked structure. The merging of these layers in a compact configuration achieves high touch sensitivity while minimizing overall device complexity through efficient spatial arrangement.
Data Source
AI summary
A flexible display device including a display panel providing a base surface and a touch screen disposed on the base surface. The display panel may include a plurality of light emitting areas and a non-light emitting area disposed adjacent to the light emitting areas. A plurality of touch electrodes and a plurality of insulating layers of the touch screen may have a mesh shape through which openings corresponding to the plurality of light emitting areas are defined. Accordingly, a flexibility of the flexible display device is improved, and the touch electrode is prevented from being cracked.