Stretchable Pixel Array Substrate With Island-Bridge Circuit Layout
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Solution Overview
Problem
Existing electronic products face structural fractures and internal circuit disconnections when stretched, leading to manufacturing yield and reliability issues.
Innovation Solution
A stretchable pixel array substrate is designed with a base having active and peripheral areas, featuring multiple islands and bridges in the peripheral area, and a gate driving circuit electrically connected to pixel structures, allowing for improved flexibility without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the substrate is made stretchable to improve flexibility and adaptability, then the electronic product can be applied in various fields with different appearances, but it may cause structural fracture due to stress and internal circuit disconnection
Solution Approach 1:
The substrate is divided into multiple independent structural units, each containing pixel structures, gate driving circuits, and support structures. This segmentation allows stress to be distributed across multiple units rather than concentrating in one location, enabling the substrate to stretch without causing complete structural failure. The modular design maintains circuit integrity while providing flexibility.
Solution Approach 2:
Different regions of the substrate have different structural characteristics optimized for their specific functions. The support structures include varying configurations of bridges, cavities, and recesses that provide localized stress management. The gate driving circuits are positioned in specific regions with enhanced support structures to protect critical circuitry during stretching.
2Adaptability or versatility
If the substrate is made stretchable to improve flexibility, then electronic products can have unrestricted appearances, but it reduces manufacturing precision and increases difficulty of detecting and measuring
Solution Approach 1:
The substrate is divided into multiple identical or similar structural units that can be manufactured using the same process parameters. Each unit contains pixel structures, gate driving circuits, and support structures with consistent dimensions. This modular approach maintains manufacturing precision while enabling overall substrate flexibility through the assembly of multiple standardized units.
3Adaptability or versatility
If the substrate is made stretchable to improve adaptability, then electronic products can be applied in various environments, but it increases device complexity
Solution Approach 1:
The complex stretchable substrate is divided into multiple standardized structural units, each containing integrated pixel structures, gate driving circuits, and support structures. This modular segmentation simplifies the overall design and manufacturing process while achieving the desired stretchability. Each unit can be independently manufactured and then assembled, reducing the complexity of creating a completely custom stretchable structure.
Solution Approach 2:
The structural units are designed with multi-functional support structures that simultaneously provide mechanical support, stress distribution, and circuit protection. The bridges, cavities, and recesses serve multiple purposes: maintaining structural integrity during stretching, providing pathways for circuits, and enabling the substrate to conform to different shapes. This multi-functionality reduces the need for separate components, thereby managing device complexity.
Data Source
AI summary
A stretchable pixel array substrate includes a base, pixel structures and a gate driving circuit electrically connected to the pixel structures. The base has an active area and a peripheral area outside the active area. The peripheral area has openings to define first islands, second islands and first bridges of the peripheral area. An area of each of the first islands is greater than an area of each of the second islands. At least a part of the first bridges is connected between the first islands and the second islands. The pixel structures are disposed on the active area of the base. The gate driving circuit includes first parts disposed on the first islands and second parts disposed on the second islands and electrically connected to the first parts.