Flexible Display Planarized Layer Thickness for Touch Stability
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Solution Overview
Problem
Existing flexible display devices face challenges in achieving a balance between thickness and manufacturing cost, while also ensuring high sensitivity and stability of touch electrodes.
Innovation Solution
The flexible device incorporates a flexible substrate with a planarized layer, touch electrodes, spacers, and a light conversion structure, where the planarized layer's thickness is between 0.5 μm to 200 μm, and its thickness ratio to the flexible substrate is between 0.025 to 20, enabling effective reduction in thickness and manufacturing cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the planarized layer thickness is increased to improve manufacturing stability and touch electrode sensitivity, then the device thickness increases and manufacturing cost increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the planarized layer thickness within a specific range (0.5-200 μm) and maintaining a thickness ratio between the planarized layer and flexible substrate between 0.025-20. This optimized parameter range ensures sufficient planarization for touch electrode sensitivity while preventing excessive thickness increase, thus resolving the contradiction between reliability and device thickness.
2Reliability
If the planarized layer thickness is increased to improve manufacturing stability, then the manufacturing cost increases
Solution Approach 1:
The patent resolves the contradiction between manufacturing stability and cost by establishing an optimized thickness range (0.5-200 μm) and thickness ratio (0.025-20) for the planarized layer. This parameter optimization ensures adequate planarization for stable manufacturing processes while avoiding excessive material consumption and processing costs, achieving a balance between reliability and ease of manufacture.
3Length of moving object
If the planarized layer thickness is decreased to reduce device thickness, then the touch electrode sensitivity and manufacturing stability deteriorate
Solution Approach 1:
The patent prevents the deterioration of touch electrode sensitivity by setting a minimum thickness of 0.5 μm and a maximum of 200 μm for the planarized layer, with a thickness ratio constraint of 0.025-20 relative to the flexible substrate. This parameter range ensures sufficient planarization performance for touch sensitivity while maintaining reduced device thickness, resolving the contradiction between thickness reduction and reliability maintenance.
Data Source
AI summary
The disclosure provides a flexible device. The flexible display device includes a flexible substrate, a planarized layer, a touch electrode, a spacer and a light conversion structure. The planarized layer is disposed on the flexible substrate. The touch electrode is disposed on the flexible substrate. A spacer is disposed on the flexible substrate. A light conversion structure is disposed on the flexible substrate. 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.