Display Panel Power Bus Segmentation for Narrow Bezel
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Solution Overview
Problem
The challenge in display panels is to reduce the voltage drop of signal lines as they become narrower, leading to increased impedance and affecting display quality and power consumption.
Innovation Solution
The implementation of a display panel design where power buses connected to light-emitting elements are divided into two buses arranged in parallel, with one bus in the display area and the other in the non-display area, reducing overall impedance and voltage drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the non-display area is narrowed to achieve high screen-to-body ratio and ultra-narrow bezel, then the display appearance is improved, but the voltage drop of signal lines increases due to reduced line width
Solution Approach 1:
The power bus system is segmented into multiple independent power buses (first power bus, second power bus, third power bus) that are distributed across different areas (display area and non-display area). Each power bus independently supplies power to specific components, avoiding the need for a single long power line that would cause high voltage drop. This segmentation allows the non-display area to be narrowed while maintaining adequate power delivery.
2Shape
If the non-display area is narrowed, then the screen-to-body ratio is improved, but the impedance of signal lines increases
Solution Approach 1:
The power bus arrangement transitions from a single-dimensional layout (all in non-display area) to a multi-dimensional distribution across both the display area and non-display area. The first power bus is arranged in the display area while the second and third power buses are arranged in the non-display area, creating a three-dimensional spatial distribution that reduces impedance without requiring a larger non-display area.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a display area and a non-display area at least partially surrounding the display area. The display panel further includes: a first power bus arranged in the display area; a second power bus arranged in the non-display area and electrically connected to the first power bus; and a third power bus arranged in the non-display area. The display area also includes: pixel circuits and light-emitting elements electrically connected to the pixel circuits. The first power bus is connected to the light-emitting elements. The third power bus is connected to the pixel circuits.