Display Panel Power Terminal Layout for Brightness Uniformity
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Solution Overview
Problem
Existing display technologies face challenges in achieving uniformity of display brightness due to voltage drop issues during power signal transmission, leading to uneven brightness across the display area.
Innovation Solution
The display panel incorporates multiple first signal terminals and signal lines arranged in a specific configuration, with a higher number of terminals located away from the edge, to improve power signal transmission efficiency and reduce voltage drops, thereby enhancing brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single signal terminal configuration is used, then device complexity is reduced, but display brightness uniformity deteriorates due to voltage drop
Solution Approach 1:
The signal terminals are divided into two distinct groups: a first group located near the edge of the display panel and a second group located away from the edge. This segmentation allows different regions of the display panel to receive power signals from optimally positioned terminals, reducing voltage drops and improving brightness uniformity across the display area.
Solution Approach 2:
Different groups of signal terminals are assigned to serve different regions of the display panel. The first group of terminals serves regions closer to the edge, while the second group serves regions farther from the edge. This local optimization ensures that each region receives power with minimal voltage drop, achieving uniform brightness across the entire display.
2Manufacturing precision
If signal terminals are uniformly distributed, then manufacturing simplicity is maintained, but voltage drop and brightness non-uniformity increase
Solution Approach 1:
The signal terminal distribution adopts an asymmetric configuration where the second group of terminals (away from edge) contains more terminals than the first group (near edge). This asymmetric arrangement optimizes power signal transmission by placing more terminals in regions that require them, reducing voltage drops and improving brightness uniformity while remaining manufacturable.
3Manufacturing precision
If fewer signal terminals are used, then device complexity is reduced, but power signal transmission efficiency deteriorates
Solution Approach 1:
Instead of uniformly distributing terminals across the entire display panel, the invention applies terminals selectively in two specific groups at strategic locations. This partial action approach uses fewer total terminals compared to a uniform distribution, while still achieving the desired brightness uniformity by concentrating terminals where they are most needed for power signal transmission.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a display area being arranged with pixels electrically connected to a pixel circuit; and first signal terminals arranged along a first direction and first signal lines respectively connected to the first signal terminals. The first signal terminals are configured to provide a first power voltage signal to the pixel circuit through the first signal lines. The first signal terminals include a first group of signal terminals and a second group of signal terminals, a number of the first signal terminals included in the second group of signal terminals is greater than a number of the first signal terminals included in the first group of signal terminals, and along the first direction, the first group of signal terminals are located between the second group of signal terminals and an edge of the display panel.