Stretchable Display Layout for Wiring Integrity and Stable Voltage
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Solution Overview
Problem
Existing display devices face issues with wiring line damage and tearing during repeated stretching, and driving voltage drop, particularly in flexible and stretchable displays.
Innovation Solution
A display device design featuring a lower and upper flexible substrate with pattern layers, including rigid plate and line patterns, and a power supply configuration that includes anchor holes and biaxial stretchability to prevent damage and voltage drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is made stretchable using flexible substrates, then the adaptability and form factor flexibility are improved, but the wiring lines become susceptible to damage and tearing during repeated stretching
Solution Approach 1:
The non-active area is divided into multiple distinct regions (first area, second area, third area) with different functional assignments. This segmentation allows each region to be optimized independently - the first area for connection lines with anchor holes, the second area for gate drivers, and the third area for power supplies - thereby protecting wiring lines while maintaining stretchability
Solution Approach 2:
Anchor holes are introduced as intermediary structures that connect connection lines to the substrate. These anchor holes prevent the connection lines from detaching or tearing during stretching by providing secure attachment points, thus mediating between the flexible substrate and the rigid wiring lines
2Adaptability or versatility
If the power supply is configured with spaced power blocks to enable biaxial stretching, then the adaptability and stretching capability are improved, but driving voltage drop increases
Solution Approach 1:
The power supply is segmented into multiple power blocks arranged in a matrix pattern across the substrate. This segmentation allows the power supply to accommodate biaxial stretching while maintaining adequate voltage distribution through the distributed architecture
Solution Approach 2:
The power blocks are arranged in a two-dimensional matrix pattern rather than a linear configuration. This dimensional arrangement enables the power supply to handle stretching in both horizontal and vertical directions while maintaining short current paths and reducing voltage drop through the distributed two-dimensional layout
3Ease of manufacture
If connection lines are placed in the non-active area for routing, then the manufacturing flexibility is improved, but the lines become vulnerable to damage during lift-off process
Solution Approach 1:
Anchor holes are pre-formed in the connection lines before the lift-off process. This preliminary action ensures that the connection lines are securely anchored to the substrate, preventing detachment or damage during the subsequent lift-off manufacturing process
Data Source
AI summary
A display device includes a stretchable lower substrate, a pattern layer disposed on the lower substrate. The pattern layer includes a plurality of first and second plate patterns, a plurality of first and second line patterns. The device includes a plurality of pixels formed on the plurality of first plate patterns, a plurality of first connection lines which connects the plurality of pixels, a gate driver formed on the plurality of second plate patterns, a power supply formed on the plurality of second plate patterns, a plurality of second connection lines, and a stretchable upper substrate.