Array Substrate Scan-Line Sharing for Uniform OLED Brightness
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Solution Overview
Problem
Existing OLED display panels face issues of uneven display brightness due to simultaneous activation of pixel units in the same row, leading to reduced display quality and increased panel frame size, and high wiring density resulting in low pixels per inch (PPI).
Innovation Solution
The array substrate design incorporates two pairs of scan signal lines and driving reset control signal lines per row, alternating data and reset voltage source signal lines, and shared scan signal lines for odd and even columns to synchronize the turn-on times of adjacent pixels, reducing the number of gate drivers and wiring, thereby improving brightness uniformity and enabling a narrow frame design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If pixel units in the same row are activated simultaneously, then display speed is improved, but brightness uniformity deteriorates
Solution Approach 1:
The scan signal lines are segmented into multiple independent lines (first scan signal line and second scan signal line) that control different column groups separately. This segmentation allows different rows or column groups to be activated at different times, preventing simultaneous activation of all pixel units in the same row while maintaining high display speed through parallel processing of multiple scan lines.
2Area of stationary object
If the number of gate drivers is increased to control more scan lines, then scanning coverage is improved, but device complexity increases
Solution Approach 1:
The same gate driver circuit is designed to perform multiple functions by sequentially controlling different scan signal lines. The gate driver can drive the first scan signal line for odd columns and then drive the second scan signal line for even columns, making a single gate driver universal for multiple scanning tasks, thereby reducing the total number of gate drivers needed while maintaining comprehensive scanning coverage.
3Productivity
If wiring density is increased to provide more signal lines, then signal transmission is improved, but pixels per inch deteriorates
Solution Approach 1:
Adjacent scan signal lines are merged into pairs (first scan signal line for odd columns, second scan signal line for even columns) that share common gate drivers and control structures. This merging reduces the total number of independent signal lines needed, lowering wiring density while maintaining adequate signal transmission capability across the display panel, thereby preserving high pixels per inch.
Data Source
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AI summary
The embodiments of the present disclosure provide an array substrate and a related display panel and a related display device. An array substrate includes a plurality of pairs of scan signal lines. A first scan signal line of the m-th pair of scan signal lines is configured to provide a first scan signal to a sub-pixel in a (2n-1)-th column from sub-pixels in the m-th. And a plurality of pairs of driving reset control signal lines. A second driving reset control signal line of the m-th pair of driving reset control signal lines is configured to provide a second driving reset control signal to the sub-pixel in the 2n-th column from the sub-pixels in the m-th row. The m and n are integers greater than or equal to 1. In the embodiments of the present disclosure, the first scan signal line of the m-th pair of scan signal lines and the second driving reset control signal line of the m-th pair of driving reset control signal lines are the same signal line.