Display Panel Power Bus Overlap for Narrow-Bezel Driving
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Solution Overview
Problem
The existing display panel driver circuits occupy a large space, making it difficult to reduce the bezel width and achieve a higher screen-to-body ratio.
Innovation Solution
The display panel design includes a driver circuit with a second power signal bus that partially overlaps the driver circuit, a unilateral or bilateral driving method, and an auxiliary connection layer to ensure efficient signal transmission while minimizing bezel area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver circuit is designed to provide drive signals for pixel units, then the display panel can function properly, but the driver circuit occupies large space and makes it difficult to reduce bezel width
Solution Approach 1:
The patent applies dimensionality change by routing the second power signal bus through the driver circuit layer in the vertical dimension (overlapping configuration) rather than expanding horizontally. This allows the bus to pass through the driver circuit area without increasing the lateral bezel width, effectively utilizing the Z-dimension to resolve the space conflict.
Solution Approach 2:
The patent implements nesting by having the second power signal bus embedded within or overlapping the driver circuit structure. The bus is positioned to pass through the driver circuit layer, with the auxiliary connection layer facilitating connections between different layers, creating a nested arrangement that saves lateral space.
2Area of stationary object
If the second power signal bus is routed to overlap the driver circuit, then the bezel width is reduced, but signal interference or connection complexity may increase
Solution Approach 1:
The patent segments the power signal bus system into at least two separate buses: a first power signal bus and a second power signal bus. This segmentation allows different buses to carry different signals and be routed through different paths, reducing interference while maintaining the overlapping configuration for space efficiency.
Solution Approach 2:
The auxiliary connection layer acts as an intermediary between the second power signal bus and other circuit elements. It facilitates connections and signal routing in a controlled manner, managing the complexity of the overlapping bus configuration and ensuring proper electrical connections without direct exposure of all connection points.
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes a driver circuit, a pixel circuit, a light-emitting element, a first power signal bus and a second power signal bus, and an auxiliary connection layer. The light-emitting element includes a first electrode and a second electrode. The first power signal bus is connected to the pixel circuit, the pixel circuit is connected to the first electrode, and the second power signal bus is connected to the second electrode. The auxiliary connection layer is located between a film where the second electrode is located and a film where the second power signal bus is located, and the auxiliary connection layer is connected to the second electrode and the second power signal bus. The driver circuit includes a first driver circuit and the display panel further includes a first signal line group.