Stretchable Pixel Array Substrate With Segmented Islands And Bridges
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Solution Overview
Problem
Existing stretchable electronic products face challenges in maintaining manufacturing yield and product reliability due to structural stress and potential internal circuit breakage when stretched.
Innovation Solution
A stretchable pixel array substrate design featuring a base with alternating first and second openings, creating islands and bridges, and a component layer with pixel structures and conductive wires. The substrate includes reinforcing structures on the bridges to adjust the neutral axis and reduce tensile stress on conductive wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the substrate is made stretchable to enable electronic products to have different appearances according to different application manners, then the adaptability and versatility of electronic products are improved, but the structure may break due to stress and internal circuits may break, worsening the reliability and manufacturing yield
Solution Approach 1:
The substrate is divided into multiple islands and bridges through first and second openings arranged in alternating patterns. The islands contain pixel structures while the bridges provide flexible connections, allowing the substrate to stretch without breaking. This segmentation enables the substrate to accommodate deformation while maintaining structural integrity and electrical connectivity.
Solution Approach 2:
Different regions of the substrate have different properties: islands are designed with rigid structures for pixel components, while bridges are designed with flexible structures for stress accommodation. The openings are strategically positioned to create zones of different mechanical properties, allowing the substrate to be both stretchable and reliable.
2Ease of operation
If the substrate is made stretchable to allow unrestricted appearance, then the ease of operation and design flexibility are improved, but the structure may break due to stress, worsening the strength and durability
Solution Approach 1:
The substrate structure is segmented into islands and bridges, where bridges are specifically designed to accommodate stretching while islands maintain structural integrity. This segmentation allows different parts to have different mechanical properties, enabling both flexibility and strength.
Solution Approach 2:
The substrate uses a two-dimensional pattern of openings arranged in first and second directions to create a three-dimensional stress distribution pattern. This dimensional approach allows stress to be distributed across multiple planes, preventing concentration at single points and maintaining structural strength during stretching.
3Adaptability or versatility
If openings are created in the substrate to enable stretchability, then the adaptability is improved, but the manufacturing precision and yield may worsen due to potential cracking
Solution Approach 1:
The substrate is segmented into islands and bridges with carefully controlled opening patterns. This segmentation allows stress to be distributed across multiple small structures rather than concentrating in large continuous areas, reducing the likelihood of cracking during manufacturing and stretching operations.
Solution Approach 2:
The opening pattern is pre-designed with specific geometric configurations that anticipate stress distribution during stretching. By preliminarily structuring the openings in alternating first and second directions, the substrate is prepared to handle manufacturing stresses and stretching forces, improving manufacturing yield.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively prevents cracking of the substrate and reduces the risk of conductive wire disconnection under stress, thereby enhancing manufacturing yield and product reliability of stretchable electronic products.
Implementation Method 1
The base has multiple first openings and multiple second openings. Each first opening has a first opening extending direction, each second opening has a second opening extending direction, and the first opening extending direction and the second opening extending direction are different. The first openings and the second openings are alternately arranged in a first direction and a second direction to define multiple islands and multiple bridges of the base.
Implementation Method 2
The substrate includes reinforcing structures on the bridges to adjust the neutral axis and reduce tensile stress on conductive wires.
Implementation Method 3
The bridge portions have multiple conductive wires and are respectively disposed on the bridges of the base. The conductive wires are electrically connected to the pixel structures.
Data Source
AI summary
A stretchable pixel array substrate, including a base and a component layer, is provided. The base has multiple first openings and multiple second openings. Each of the first openings has a first opening extending direction. Each of the second openings has a second opening extending direction. The first opening extending direction and the second opening extending direction are different. The first openings and the second openings are alternately arranged in a first direction and a second direction to define multiple islands and multiple bridges of the base. The component layer is disposed on the base and includes multiple island portions and multiple bridge portions. The island potions have multiple pixel structures and are respectively disposed on the islands of the base. The bridge portions have conductive wires and are respectively disposed on the bridges of the base. The conductive wires are electrically connected to the pixel structures.