Display Panel Reset-Line Topology for Split-Screen Mura
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Solution Overview
Problem
Current display panels with under-screen cameras experience inconsistent resistor-capacitor loading due to unequal connection of pixel driving circuits, leading to horizontal cloud patterns and uneven display in low grayscale mode.
Innovation Solution
The display panel design includes a first display region with more pixel driving circuits than a second display region, utilizing stepped connection methods for reset signal lines to connect to the second region, ensuring consistent load distribution and eliminating split-screen phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of pixel driving circuits in the under-screen camera region is reduced to improve light transmittance, then light transmittance is improved, but inconsistent RC loading occurs leading to horizontal cloud patterns and uneven display
Solution Approach 1:
The patent changes the connection configuration parameter of reset signal lines, specifically connecting one terminal of each first reset signal line to corresponding first pixel driving circuits and another terminal of one of any two adjacent first reset signal lines to corresponding second pixel driving circuits. This parameter change in connection topology balances the RC loading across different display regions, eliminating horizontal cloud patterns while maintaining reduced pixel driving circuits for high light transmittance in the under-screen camera region.
2Ease of operation
If signal lines from standard display regions are extended to under-screen camera region to connect pixel driving circuits, then connectivity is improved, but RC loading becomes inconsistent causing mura and uneven display
Solution Approach 1:
The patent segments the reset signal lines into first reset signal lines for first pixel driving circuits and second reset signal lines for second pixel driving circuits. This segmentation allows independent optimization of connection configurations for each region, enabling balanced RC loading while maintaining necessary electrical connectivity. The segmented approach prevents the mura effect by avoiding inconsistent loading that would result from unified signal line extension.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a display substrate including a first display region and a second display region adjacent to the first display region, n rows of first pixel driving circuits located in the first display region and m rows of second pixel driving circuits located in the second display region, a plurality of reset signal lines including n first reset signal lines corresponding to the n rows of the first pixel driving circuits; wherein one terminal of each of the first reset signal lines is electrically connected to the corresponding first pixel driving circuits, and another terminal of one of any two adjacent first reset signal lines is electrically connected to the corresponding second pixel driving circuits. The display device includes the display panel.