Flexible Display Substrate With Hard Material Layer at Fragile Positions
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Solution Overview
Problem
Flexible display substrates are prone to damage during deformation, have limited deformation capabilities, and face issues with display performance and manufacturing costs due to fragile structures and material limitations.
Innovation Solution
A flexible display substrate with a hard material layer strategically positioned at fragile areas to enhance resistance to deformation, allowing for larger deformation without damage and maintaining good display performance, while using existing manufacturing processes and equipment to reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If substitute materials (oxide semiconductor or organic semiconductor) are used in the active region of TFT, then flexibility is improved, but performance degrades and costs increase
Solution Approach 1:
The patent applies local quality by differentiating the material properties in different regions of the display substrate. The fragile structure regions (TFT active regions, pixel electrodes, lead wires) use hard materials for protection, while non-fragile regions maintain flexibility. This localized differentiation resolves the contradiction by providing flexibility where needed and protection where required.
2Reliability
If elastic material layer is used to encapsulate display structures, then protection from damage is improved, but deformation ability is reduced
Solution Approach 1:
The patent implements local quality by strategically placing hard material layers only at fragile positions (TFT active regions, pixel electrodes, lead wires) rather than using a uniform encapsulation approach. This allows the substrate to deform freely in non-fragile areas while providing targeted protection where needed, thus maintaining deformation ability while improving protection.
Solution Approach 2:
The patent applies segmentation by dividing the substrate into fragile and non-fragile regions, and applying different material properties to each segment. The hard material layers are segmented to cover only specific fragile structures, allowing other areas to maintain their original flexible characteristics and deformation capability.
3Strength
If hard material layer is added at fragile positions, then resistance to deformation is improved, but device complexity increases
Solution Approach 1:
The patent reduces complexity by applying local quality - hard material layers are added only at specific fragile positions (TFT active regions, pixel electrodes, lead wires) rather than uniformly across the entire substrate. This targeted approach provides necessary protection while minimizing the increase in device complexity.
Solution Approach 2:
The patent employs composite materials by combining hard materials (for protection) with flexible materials (for substrate flexibility) in a single substrate structure. This composite approach allows the substrate to exhibit both protective strength at critical locations and overall flexibility, avoiding the need for separate protective layers and reducing structural complexity.
Data Source
AI summary
The present invention provides a flexible display substrate, the manufacturing method thereof and a flexible display device, relates to the field of flexible display technology, and can solve the technical problems that the existing flexible display substrate is easy to be damaged during deforming, has small amount of deformation, degraded display performance or high costs, or has difficulty in manufacturing process. The flexible display substrate according to the present invention comprising a hard material layer disposed at the fragile positions of the flexible display substrate. The manufacturing method for the flexible display substrate according to the present invention comprises forming a pattern of a hard material layer. The flexible display device of the present invention comprises the flexible display substrate mentioned above. The present invention is applicable to flexible display devices such as flexible organic electroluminescent display device, flexible electrophoretic display device, or liquid crystal display device.