Array Substrate Odd-Even Row Pixel Arrangement for Brightness Uniformity
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Solution Overview
Problem
Liquid crystal display (LCD) systems face issues with uneven brightness between subpixels of the same color in adjacent rows, leading to visible bright and dark stripes during the display of mixed color images, due to the sequential input of data signals into data lines connected with switching elements.
Innovation Solution
The array substrate is designed with subpixels of different colors arranged in specific sequences in odd and even rows, and data signals are inputted into data lines according to specific sequences using switches connected to gate control lines, ensuring that subpixels of the same color in adjacent rows receive balanced voltage signals to maintain uniform brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data signals are sequentially input into data lines connected with switching elements, then the display can be driven with reduced data driver ICs using multiplexer technology, but uneven brightness between subpixels of the same color in adjacent rows occurs
Solution Approach 1:
The pixel array is segmented into odd rows and even rows with different subpixel arrangement sequences. Odd rows follow sequence ABCD while even rows follow sequence CDAB, creating alternating patterns that prevent systematic brightness errors from propagating across the entire display.
Solution Approach 2:
Different local arrangements are applied to odd and even rows. The subpixel sequences are locally optimized for each row type, with odd rows using ABCD sequence and even rows using CDAB sequence, allowing each local region to compensate for the sequential input limitations.
2Ease of manufacture
If subpixels are arranged in standard sequential order, then manufacturing is simplified, but transverse bright and dark stripes appear during mixed color image display
Solution Approach 1:
The subpixel arrangement introduces asymmetry between adjacent rows. Instead of uniform ABCD ordering throughout, odd rows use ABCD while even rows use CDAB, creating an asymmetric pattern that disrupts the formation of systematic transverse stripes while remaining manufacturable.
Solution Approach 2:
The arrangement sequence in even rows is effectively inverted or shifted relative to odd rows. By using CDAB in even rows instead of ABCD, the patent applies the sequence 'the other way round' to prevent stripe formation while maintaining manufacturing simplicity.
Data Source
AI summary
An array substrate, a display panel, a display device, and driving methods thereof are provided. The array substrate includes subpixels arranged in an array, and switches. The subpixels include subpixels of a first color, subpixels of a second color, subpixels of a third color, subpixels of a fourth color, in odd rows of subpixels, the subpixels of the first color, the subpixels of the second color, the subpixels of the third color, the subpixels of the fourth color are sequentially arranged; in even rows of subpixels, the subpixels of the third color, the subpixels of the fourth color, the subpixels of the first color, the subpixels of the second color are sequentially arranged; and the subpixels of the first color are white subpixels; the subpixels of the second color are blue subpixels; the subpixels of the third color are green subpixels; the subpixels of the fourth color are red subpixels.