Stretchable Display Pixel Layout With Bridge Voltage Routing
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Solution Overview
Problem
Existing stretchable display apparatuses face challenges in maintaining display quality and efficiency during deformation, particularly in connecting island portions and ensuring proper electrical connections in various forms and directions.
Innovation Solution
A display apparatus design with defined island portions connected by bridge portions, incorporating specific transistor and capacitor configurations, and insulated voltage lines to maintain electrical connectivity and reduce overlap, allowing for stretchability without compromising display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If island portions are connected by bridge portions to enable stretchability, then the display apparatus can deform and stretch, but electrical connection reliability deteriorates due to deformation stress
Solution Approach 1:
The display apparatus is divided into island portions (containing pixel circuits) and bridge portions (connecting the islands). This segmentation allows the island portions to maintain their structural integrity and electrical connections while the bridge portions accommodate the mechanical stress of stretching and deformation, thus resolving the contradiction between stretchability and electrical connection reliability.
Solution Approach 2:
Different regions of the display apparatus are given different functional properties: the island portions are designed with rigid structures to maintain display quality and electrical connections, while the bridge portions are designed with flexible structures to accommodate deformation. This local differentiation allows the overall system to achieve both stretchability and reliable electrical connections.
2Reliability
If voltage lines are arranged in bridge portions to maintain electrical connectivity, then electrical connection is improved, but overlap with data lines increases causing interference
Solution Approach 1:
The voltage lines are routed through the bridge portions, which are spatially separated from the data lines that run through the island portions. This three-dimensional routing strategy allows voltage lines and data lines to coexist without overlapping, eliminating interference while maintaining electrical connectivity across the stretchable display apparatus.
Solution Approach 2:
The voltage lines are extracted from the island portions and routed through the bridge portions instead. This separation removes the potential for overlap and interference between voltage lines and data lines, while still achieving the goal of maintaining electrical connectivity across the display apparatus during deformation.
3Manufacturing precision
If transistors and capacitors are configured in each island portion to maintain pixel functionality, then display quality is improved, but device complexity increases
Solution Approach 1:
The pixel circuit configuration using transistors and capacitors in each island portion is designed to be universal and modular. This standardized design allows for consistent display quality across all pixels while simplifying the manufacturing process and reducing overall device complexity through repetition and standardization.
Data Source
AI summary
Provided is a display apparatus. A pixel including a capacitor electrically connected to a first electrode of a light-emitting diode and a sustain voltage line is arranged in an island portion of a display area. A vertical voltage line, which is a portion of the sustain voltage line extending to a bridge portion, includes a first sub-line and a second sub-line spaced apart from each other in a plan view. In the bridge portion, the first sub-line and the second sub-line do not overlap upper data lines.