Display Substrate Power Bus Layout for Narrow-Bezel Panels
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Solution Overview
Problem
The layout of peripheral areas in high-resolution display products is difficult due to the increased number of pixel drive signal lines and larger signal line loading, which complicates the design and increases the border width.
Innovation Solution
A display substrate design with a power bus system that includes multiple power parts and conductive connection portions, reducing the number of connections and optimizing the layout to minimize border width and signal line loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels in the view area is increased to improve 3D display effect, then the display resolution is improved, but the number of pixel drive signal lines and drive channels increases, making the peripheral area layout more difficult and the signal line loading larger
Solution Approach 1:
The power bus is segmented into multiple power parts (first power part, second power part, third power part, fourth power part) connected through conductive connection portions. This segmentation allows the power distribution network to be divided into manageable sections, reducing the complexity of routing and connecting power lines to numerous pixel drive signal lines in high-resolution displays.
Solution Approach 2:
The patent utilizes multiple layers (first layer, second layer, third layer) for routing power lines and signal lines. By transitioning from a two-dimensional layout to a three-dimensional multi-layer structure, the patent accommodates increased signal line density without proportionally increasing peripheral area complexity, as lines can be routed on different vertical levels.
2Measurement precision
If the number of pixels in the view area is increased to improve 3D display effect, then the display resolution is improved, but the signal line loading in the peripheral area becomes larger
Solution Approach 1:
The power bus is divided into multiple power parts connected through conductive connection portions, allowing power distribution to be segmented and managed in sections. This reduces the loading on individual signal lines by distributing power delivery across multiple connection points rather than requiring single high-capacity lines.
Solution Approach 2:
Multiple power lines (first power line, second power line, third power line, fourth power line) are merged into a unified power bus structure with shared conductive connection portions. This merging allows for consolidated power distribution that optimizes signal line utilization and reduces redundant routing, thereby降低ing overall signal line loading.
3Ease of manufacture
If a traditional power bus layout is used, then the power distribution is simple, but the border width is larger and the lighting yield is reduced
Solution Approach 1:
The patent employs a multi-layer structure where power lines and signal lines are routed on different layers (first layer, second layer, third layer). This vertical dimensionality allows power distribution to maintain simplicity through standardized layer routing while significantly reducing the horizontal border width required for signal line management, thereby increasing the effective display area and lighting yield.
Solution Approach 2:
Different regions of the display substrate are assigned different functions: the display area contains pixel electrodes and signal lines, while the peripheral area contains the segmented power bus structure. This local differentiation allows the power distribution system to be optimized for compactness in specific regions without compromising overall manufacturing simplicity.
Data Source
AI summary
A display substrate and a display device are provided. The display substrate includes a display area and a peripheral area, the peripheral area includes a first frame area and a second frame area that are arranged opposite to each other, and the display area is located between the first frame area and the second frame area; the display substrate further includes: a plurality of first power branch lines, at least part of the first power branch lines are located in the display area; a first power bus, the first power bus includes a first sub-power line, the first sub-power line is located in the first frame area