Multi-Layer Transparent Traces for High Screen-to-Body Displays
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Solution Overview
Problem
The challenge lies in efficiently placing a large quantity of transparent traces within a limited space in display devices with high screen-to-body ratios, such as those with under-screen cameras, without compromising aesthetics or functionality.
Innovation Solution
The solution involves organizing transparent traces connected to driving electrodes of scanning lines into different layers, allowing for increased wiring space while preventing short circuits, and optimizing the layout to overlap and intersect orthographic projections of these traces across multiple layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If transparent traces are placed in a single layer to simplify structure, then device complexity is reduced, but the quantity of transparent traces that can be accommodated in limited space is insufficient
Solution Approach 1:
The patent transitions from a single-layer trace arrangement to a multi-layer structure, utilizing the vertical dimension to accommodate transparent traces. By distributing traces across multiple layers with different z-coordinates, the system increases the effective wiring capacity without expanding the planar footprint, thus resolving the contradiction between trace quantity and space limitation.
Solution Approach 2:
The patent segments the transparent trace system into multiple independent layers, where each layer contains a subset of traces. This segmentation allows traces to be organized and routed separately in different vertical planes, preventing overcrowding in any single layer and enabling the accommodation of a larger total number of traces within the limited space.
2Area of stationary object
If transparent traces are densely packed to maximize space utilization, then area efficiency is improved, but short circuits between adjacent traces may occur
Solution Approach 1:
By distributing traces across multiple vertical layers, the patent increases the spatial separation between adjacent traces in the planar view. Traces that would be densely packed and prone to short circuits in a single layer are instead separated in the z-dimension, maintaining electrical isolation while achieving high area utilization through efficient vertical stacking.
Solution Approach 2:
The patent introduces insulating layers as intermediary structures between conductive trace layers. These insulating layers act as mediators that prevent direct contact and potential short circuits between traces in adjacent layers, enabling dense trace packing while maintaining electrical isolation and system reliability.
3Quantity of substance
If the transparent displaying region is enlarged to accommodate more traces, then trace capacity is improved, but the screen-to-body ratio and aesthetic appearance are deteriorated
Solution Approach 1:
The patent resolves the contradiction by moving the expansion direction from the planar dimension to the vertical dimension. Instead of enlarging the transparent displaying region horizontally (which would reduce screen-to-body ratio), the system expands trace capacity vertically through multiple layers, keeping the visible display area intact while accommodating more traces within the same footprint.
Data Source
AI summary
The present application provides a displaying base plate and a displaying device, wherein the displaying base plate includes a transparent displaying region and an effective displaying region, the transparent displaying region includes a plurality of scanning lines, each of the scanning lines includes one or more first light emitting regions, a driving electrode of each of the first light emitting regions is connected to a corresponding driving circuit via a transparent trace, the transparent traces connected to the driving electrodes of a same one instance of the scanning lines are located in a same one layer, the plurality of scanning lines include at least a pair of neighboring first scanning line and second scanning line, and the transparent traces connected to the driving electrodes of the first scanning line and the transparent traces connected to the driving electrodes of the second scanning line are located in different layers.