Display Panel Touch-Electrode Grid Layout for Narrow-Border Grounding
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Solution Overview
Problem
Existing OLED-based touch structures face challenges in achieving lightweight, flexible, and narrow border designs while maintaining effective signal transmission and grounding for touch functionality.
Innovation Solution
A display panel design incorporating a touch panel with metal wire grid patterns and a specific arrangement of grounding wires and auxiliary grounding wires, along with dummy line segments, to optimize signal transmission and grounding within a narrow border region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a flexible touch substrate is arranged on the encapsulation layer to achieve lightweight and foldable design, then the device achieves flexibility and reduced thickness, but the border region becomes narrower making signal transmission and grounding more difficult
Solution Approach 1:
The grounding system is segmented into multiple grounding wires distributed across the border region, with each grounding wire connecting to different touch electrodes. This segmentation allows effective grounding even in narrow border regions by distributing the grounding function across multiple points rather than requiring a single large grounding structure.
Solution Approach 2:
The patent utilizes the vertical dimension by arranging grounding wires and signal leads in layers within the border region. The grounding wires are positioned at different heights and locations, creating a three-dimensional grounding network that maximizes the use of available space in the narrow border region while maintaining effective signal transmission.
2Length of moving object
If the border region is narrowed to meet product requirements, then the device achieves narrower borders, but the arrangement of signal leads and grounding wires becomes more constrained
Solution Approach 1:
Different regions of the border are assigned different functions: some areas contain signal leads while others contain grounding wires. The signal leads are routed along specific paths optimized for signal transmission, while grounding wires are positioned to maximize grounding effectiveness. This local differentiation allows efficient use of the narrow border space.
Solution Approach 2:
The patent employs flexible routing designs for signal leads and grounding wires that can adapt to different display panel configurations. The signal leads and grounding wires are arranged to follow the border shape dynamically, allowing the same design to work across different device sizes and configurations while maintaining narrow borders.
3Reliability
If multiple grounding wires are arranged in the border region to improve grounding efficiency, then grounding effectiveness increases, but the space available for other components decreases
Solution Approach 1:
The border region is designed to serve multiple functions simultaneously: signal transmission, grounding, and structural support. The signal leads and grounding wires share the border space through vertical layering and strategic positioning, allowing the narrow border to fulfill multiple roles without requiring additional space.
Solution Approach 2:
The grounding wires and signal leads are nested within the border region in a hierarchical arrangement. The grounding wires form a base layer that provides grounding coverage, while signal leads are positioned above or alongside them. This nesting allows multiple components to coexist in the limited border space without interfering with each other's function.
Data Source
AI summary
Provided are a display panel, a preparation method thereof, and a display device. The display panel includes a display substrate and a touch panel. The touch panel includes multiple touch electrodes. At least one of the touch electrodes includes multiple grid patterns enclosed by metal wires. At least one of the grid patterns includes a first edge, second edge, third edge and fourth edge that form a ring. The first edge and the third edge extend in a second direction. The second edge and the fourth edge extend in a first direction. A shape of the grid pattern includes a first curved ring, a second curved ring, a third curved ring, or a fourth curved ring. A first edge and third edge of the first curved ring are curves curved towards a direction opposite to the first direction.