Display Panel Power Bus Segmentation for Voltage Drop
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Solution Overview
Problem
Traditional OLED display panels face issues with luminance uniformity due to voltage drop during power supply voltage transmission, leading to reduced long-range uniformity and increased power consumption, which can result in luminance below user requirements.
Innovation Solution
The display panel design includes a power bus and power lines that extend from the FPC bonding region to the middle of the display region, then to the top and bottom, reducing the transmission path and voltage drop, and incorporates a power management circuit to provide power supply voltage uniformly across the display region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power supply voltage is transmitted through traditional power lines from FPC bonding region to display region, then power can be supplied to pixel units, but voltage drop occurs during transmission leading to reduced luminance uniformity
Solution Approach 1:
The display region is divided into a first display region and a second display region, with separate power supply paths. The first power line supplies the first region while the second power line supplies the second region, preventing voltage drop in one region from affecting the other and ensuring uniform luminance across the entire display.
Solution Approach 2:
Power supply is achieved not only from the FPC bonding region but also from the middle of the display region through the first and second power lines. This multi-dimensional power distribution approach reduces transmission distance and minimizes voltage drop, improving luminance uniformity.
2Reliability
If power transmission path is extended to cover entire display region, then all pixel units can be powered, but power consumption increases
Solution Approach 1:
The display region is segmented into first and second regions with dedicated power lines for each. This segmentation allows independent power management, reducing overall power consumption while ensuring complete power supply coverage across the entire display region.
Solution Approach 2:
Different power supply configurations are applied to different regions. The first power line and second power line are configured according to the specific needs of the first and second display regions, optimizing power distribution efficiency and reducing total power consumption.
Data Source
AI summary
A display panel, a display device, and a method for manufacturing a display panel are disclosed. The display panel includes a first power bus and a first power line. A display region of the display panel includes a first region and a second region, the first region and the second region include a plurality of first pixel units, respectively, the first power bus is between the first region and the second region, and the first power line is electrically connected to the first power bus and extends from the first power bus to the first region and the second region, respectively, so as to supply power to the plurality of first pixel units in the first region and the second region, respectively.