Stretchable Display Circuit Layout Using Island-Bridge Routing
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Solution Overview
Problem
Existing display apparatuses struggle to efficiently utilize space in non-display areas while maintaining high-quality image rendering and improving stretchability properties.
Innovation Solution
A display apparatus design featuring a substrate with island portions and bridge portions, where a gate driving circuit is located in one island portion and input lines are arranged on another island portion, with connection lines extending through bridge portions to connect the input lines to the gate driving circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the gate driving circuit and input lines are disposed in separate island portions with connection lines extending through bridge portions, then the stretchability is improved and space utilization is enhanced, but the device complexity increases due to the multi-island structure and connection routing
Solution Approach 1:
The substrate is divided into multiple island portions (first island portion for gate driving circuit, second island portion for input lines, and main island portion for pixel circuits) connected by bridge portions. This segmentation allows each island to be optimized independently for its function while the bridge portions provide flexible connection paths that can accommodate stretching deformations, thus improving overall stretchability without compromising functionality.
Solution Approach 2:
The connection lines are routed through the bridge portions in a manner that extends beyond simple linear connections. The connection lines may include diagonal portions and portions extending in multiple directions, utilizing two-dimensional space within the bridge portions to create flexible routing paths that can accommodate stretching while maintaining electrical connections.
2Area of stationary object
If the connection line includes diagonal portions and multi-directional extensions to connect input lines to gate driving circuit, then the space utilization is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The connection lines are designed with dynamic routing capabilities, including diagonal portions and multi-directional extensions that can adapt to the physical layout requirements. This dynamic design allows the connection lines to efficiently utilize available space in the non-display area while providing multiple potential fabrication approaches (such as photolithography patterning) to achieve the required precision.
Solution Approach 2:
Different portions of the connection lines have different geometric characteristics (linear portions, diagonal portions, branching portions) optimized for their local spatial requirements. This local optimization allows efficient space utilization in different regions of the substrate while maintaining manufacturability through standard fabrication techniques applied to each specific portion.
3Ease of operation
If multiple island portions are arranged alternately with bridge portions connecting them, then the organization of circuit components is improved, but the area occupied increases
Solution Approach 1:
The circuit components are segmented into functional islands (gate driving circuit island, input lines island, pixel circuits island) connected by bridge portions. This segmentation organizes components by function, improving ease of operation and maintenance. The alternating arrangement of islands with bridge portions in between allows for efficient packing that minimizes the total area occupied while maintaining clear functional separation.
Solution Approach 2:
Multiple functional elements are merged into integrated island-bridge structures where the bridge portions serve dual functions: connecting different islands electrically and providing structural support for the overall flexible display apparatus. This merging reduces the total area compared to having separate disconnected components.
Data Source
AI summary
A display apparatus includes: a substrate including a first island portion and a second island portion spaced apart from each other, and a first bridge portion connecting the first island portion to the second island portion, a gate driving circuit disposed on the first island portion, a plurality of first input lines disposed on the second island portion, a connection line connected to some of the plurality of first input lines. The connection line is arranged to extend from the second island portion to the first island portion through the first bridge portion.