Display Panel Notch Trace Routing for Screen-to-Body Ratio
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Solution Overview
Problem
Existing display panels with special-shaped designs and notches face challenges in maximizing the screen-to-body ratio due to the space occupied by signal lines, which limits the display area and pixel distribution around the hole.
Innovation Solution
The display panel incorporates traces on different layers and serpentine bending sections around the hole to reduce the non-display area, allowing for a closer proximity between the display area and the hole, thereby increasing the screen-to-body ratio by minimizing the space occupied by signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines are distributed around the hole in traditional designs, then electrical connections are established, but the non-display area increases and screen-to-body ratio decreases
Solution Approach 1:
The patent applies multi-layer trace design where signal lines are distributed across different layers (first layer, second layer, third layer) instead of confining all traces to a single plane. This dimensional transition allows traces to route around the hole more efficiently in 3D space, reducing the required non-display area while maintaining electrical connectivity.
Solution Approach 2:
The signal transmission path is segmented across multiple layers with different trace types (first trace, second trace, third trace, fourth trace) serving different routing functions. This segmentation allows optimal path planning for each trace group, minimizing the total area occupied by signal lines in the non-display region.
2Length of stationary object
If the distance between display area and hole is reduced, then screen-to-body ratio increases, but the risk of short circuit between adjacent traces increases
Solution Approach 1:
By transitioning from 2D planar trace routing to 3D multi-layer routing, the patent vertically separates traces that would otherwise be adjacent in the same plane. This dimensional separation increases the effective distance between traces while allowing the horizontal distance between display area and hole to be minimized, thus reducing short circuit risk while improving screen-to-body ratio.
Solution Approach 2:
The patent introduces intermediate routing structures including serpentine bending sections and跨层连接 (inter-layer connections) that act as mediators between the display area and the hole. These intermediate elements provide electrical isolation and safe routing paths, enabling closer spacing while maintaining reliability.
3Area of stationary object
If serpentine bending sections are added to traces, then traces can route around the hole more efficiently, but trace length and manufacturing complexity increase
Solution Approach 1:
The complex serpentine routing is segmented into standardized modular sections (first trace, second trace, third trace, fourth trace) with defined functions. Each segment follows a predictable pattern that can be manufactured using standard photolithography processes, reducing the impact of complexity on manufacturing despite the reduced non-display area.
Data Source
AI summary
A display panel is provided, including: a display area, where an edge of the display area is formed with a notch; a hole formed in an area surrounded by an outline of the notch; a non-display area disposed between the display area and the hole; and a first trace and a second trace disposed on the non-display area, where the second trace is adjacent to and electrically isolated from the first trace. The first trace and the second trace extend from one side of the non-display area to an opposite side, and include serpentine bending sections around the hole. The first trace and the second trace are located on different layers.