Flexible Display Layer Stack for Thinness and Structural Stability
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Solution Overview
Problem
Existing flexible display devices face challenges in achieving a balance between small thickness and low manufacturing costs while maintaining structural integrity and electrical stability.
Innovation Solution
The flexible device incorporates a flexible substrate with a planarized layer, touch electrode, spacer, light conversion structure, and protective cover layer, where the planarized layer thickness ranges from 0.5 μm to 200 μm, and its thickness ratio to the flexible substrate thickness is between 0.025 to 20, enhancing stability and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the planarized layer thickness is reduced to achieve smaller device thickness, then the overall device thickness decreases, but the structural stability and adhesion may deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the thickness of the planarized layer within a specific range (0.5 μm to 200 μm) and controlling its thickness ratio relative to the flexible substrate (0.025 to 20). This quantitative parameter optimization allows the device to achieve reduced thickness while maintaining structural stability and adhesion properties within acceptable ranges.
2Stability of the object's composition
If complex multi-layer structures are added to improve structural stability, then structural stability improves, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent applies local quality by providing different structural characteristics in different regions or layers. The planarized layer with controlled thickness and ratio provides localized structural support and stability where needed, while other layers maintain their specific functions. This allows structural stability to be achieved without uniformly increasing complexity throughout the entire device structure.
Data Source
AI summary
The flexible display device provided herein includes a flexible substrate, a planarized layer, a touch electrode, a spacer, a light conversion structure, and a protective cover layer. The planarized layer and the touch electrode are disposed on the flexible substrate. The spacer is disposed on the flexible substrate. The light conversion structure is disposed on the flexible substrate. The protective cover layer is disposed on the flexible substrate, wherein the flexible substrate partially overlaps the protective cover layer. In a cross section view, the protective cover layer has a first length, the flexible substrate has a second length, and the first length is less than the second length. A thickness of the planarized layer is in a range from 0.5 μm to 200 μm. A thickness ratio of the thickness of the planarized layer to a thickness of the flexible substrate is in a range from 0.025 to 20.