Stretchable Display Connection Lines Multi-Layer Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Stretchable display devices face limitations in space and reliability due to the restricted number and configuration of connection lines, which hinder image quality and durability when stretched.
Innovation Solution
The implementation of a stretchable display device with a layered structure of substrates and connection lines, where lower and upper connection lines are disposed below and above the connection substrates, respectively, forming a parallel connection structure to increase the number of connection lines and reduce resistance, thereby enhancing image quality and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If connection lines are arranged in a traditional single-layer configuration, then the device structure is simple, but the number of connection lines is limited and resistance is high
Solution Approach 1:
The patent transitions from a single-layer connection line arrangement to a multi-layer configuration where connection lines are disposed at different heights (first height and second height). This dimensional change allows multiple connection lines to coexist in the same planar space without overlapping, thereby increasing the total number of connection lines while maintaining structural simplicity.
Solution Approach 2:
The connection lines are segmented into multiple groups positioned at different heights. Each group operates independently, allowing for increased density of connection lines within the same footprint. This segmentation enables more signal pathways without increasing the overall device complexity.
2Quantity of substance
If more connection lines are added to improve image quality, then image quality improves, but the space available for connection lines is limited
Solution Approach 1:
By utilizing the vertical dimension with connection lines at different heights, the patent effectively increases the available space for routing connection lines without expanding the planar footprint. This allows more connection lines to be packed into the same area by distributing them across multiple vertical levels.
Solution Approach 2:
Connection lines at different heights are nested within the same planar projection area. The multi-layer arrangement allows connection lines to be nested vertically, maximizing the use of available space and accommodating more connection lines within the limited area.
3Reliability
If connection lines are arranged in a multi-layer parallel structure, then resistance is reduced and reliability improves, but the device structure becomes more complex
Solution Approach 1:
The patent employs a multi-layer structure with connection lines at different heights to provide redundant signal pathways. This dimensional arrangement reduces resistance by offering multiple parallel conduction paths and improves reliability through structural redundancy, while the regular alternating pattern keeps the complexity manageable.
Solution Approach 2:
The connection lines are arranged with alternating heights in a regular pattern, creating local variations in the structure that optimize electrical performance. This local quality variation allows for reduced resistance and improved signal integrity while maintaining overall structural order and controlling complexity.
4Adaptability or versatility
If connection lines are stretched during device deformation, then the display device achieves stretchability, but the connection lines experience stress and potential failure
Solution Approach 1:
The multi-layer configuration with connection lines at different heights provides structural redundancy that enhances stretchability. When the device is stretched, the vertical separation between layers allows for greater deformation tolerance, reducing stress on individual connection lines and preventing failure while maintaining electrical connectivity.
Data Source
AI summary
Provided is a display device. The display device includes a stretchable display device. The stretchable display device includes a lower substrate including a display area and a non-display area. The stretchable display device further includes a plurality of lower connection lines on the lower substrate. The stretchable display device further includes a plurality of first substrates disposed on the display area, the plurality of first substrates defines sub pixels, and a modulus of the plurality of first substrates is larger than a modulus of the lower substrate. The stretchable display device further includes a plurality of connection substrates connecting adjacent first substrates among the plurality of first substrates. The stretchable display device further includes a plurality of upper connection lines disposed on the plurality of connection substrates. Therefore, various connection lines are configured in a limited space to improve an image quality of a stretchable display device.