Stretchable Display Layout With Island Wiring and ESD Protection
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Solution Overview
Problem
Existing flexible display apparatuses face challenges in efficiently utilizing space in non-display areas while maintaining stretchability and image quality.
Innovation Solution
The display apparatus incorporates a substrate with driver and wiring island portions connected by bridge portions, featuring an electrostatic discharge prevention circuit and specific input lines, including a start signal line connected to the circuit, and utilizes serpentine-shaped bridge portions for efficient signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the non-display area is utilized for additional circuits and wiring, then space utilization is improved, but the stretchability and flexibility of the display apparatus deteriorates
Solution Approach 1:
The substrate is divided into multiple isolated island portions (driver island, wiring island, bridge portion) that are spatially separated. This segmentation allows each island to be independently designed and optimized - the driver island for circuit functions, the wiring island for signal transmission, and the bridge portion for mechanical flexibility, thereby resolving the contradiction between space utilization and stretchability.
Solution Approach 2:
The patent transitions from a planar continuous substrate to a three-dimensional distributed island structure. By arranging functional elements across multiple islands in different spatial dimensions and connecting them through bridge portions, the design achieves both efficient space utilization in non-display areas and maintained stretchability through the flexible bridge connections.
2Adaptability or versatility
If the driver island portion and wiring island portion are spaced apart, then stretchability is improved, but signal transmission efficiency deteriorates
Solution Approach 1:
The bridge portion serves as an intermediary element connecting the driver island portion and wiring island portion. It mediates between the conflicting requirements by providing both mechanical flexibility (maintaining stretchability) and electrical connectivity (ensuring signal transmission efficiency) through its specialized structure that allows signal passage while accommodating physical separation.
3Reliability
If electrostatic discharge prevention circuit is added, then reliability is improved, but device complexity increases
Solution Approach 1:
The electrostatic discharge prevention circuit is merged with the existing driver island portion infrastructure. By integrating the ESD protection functionality into the driver island rather than adding separate dedicated structures, the patent achieves improved reliability while minimizing the increase in device complexity through shared spatial and structural resources.
Data Source
AI summary
A display apparatus includes a substrate including a driver island portion, a wiring island portion, and a bridge portion. The driver island portion and the wiring island portion are spaced apart from each other in a first direction, and the bridge portion connects the driver island portion to the wiring island portion, a gate driving circuit disposed in the driver island portion, an electrostatic discharge prevention circuit disposed in the driver island portion, and a plurality of first input lines arranged in the wiring island portion and extending in a second direction crossing the first direction. The plurality of first input lines includes a start signal line, and the start signal line is electrically connected to the electrostatic discharge prevention circuit.