Array Substrate Polarity Arrangement for Liquid Crystal Display
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Solution Overview
Problem
Dynamic dark lines frequently occur in liquid crystal display panels when switching between positive and negative frames due to identical driving polarities of pixel units in the column direction, affecting the display effect.
Innovation Solution
The array substrate is designed with pixel units arranged in an array, where each pixel unit includes two sub-pixels with the same driving polarities, either positive or negative frame driving, and adjacent pixel units in the same row have different driving polarities, while in the column direction, the polarities of adjacent units are alternated between different rows, ensuring that sub-pixels with different light emission states are connected to the same scan line and positioned on different sides of the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data line sharing (DLS) architecture is adopted to reduce manufacturing cost, then manufacturing cost is reduced, but dynamic dark lines appear affecting display effect
Solution Approach 1:
The patent applies asymmetry by implementing different polarity arrangements for odd and even columns. Odd columns use one polarity sequence while even columns use the opposite polarity sequence, breaking the symmetry that causes dynamic dark lines. This asymmetric design maintains the DLS architecture's cost benefits while eliminating the display defect through differentiated column-level polarity control.
Solution Approach 2:
The patent implements dynamic polarity switching at the column level rather than using static frame inversion. By dynamically adjusting the polarity sequence for each column type (odd vs. even), the system adapts to prevent synchronous switching across all columns, thereby eliminating dynamic dark lines while maintaining operational flexibility.
2Ease of manufacture
If frame inversion is performed with identical driving polarities in column direction, then manufacturing cost is reduced through DLS, but frequency of sub-pixel conversion becomes uniform causing dynamic dark lines
Solution Approach 1:
The patent segments the display into odd and even columns, applying different polarity sequences to each segment. This segmentation prevents uniform sub-pixel conversion frequency across the entire display, as odd and even columns operate with offset polarity patterns, thereby eliminating dynamic dark lines while preserving the cost advantages of DLS architecture.
Solution Approach 2:
The patent applies local quality by tailoring the polarity sequence to specific column locations. Odd columns receive one polarity pattern while even columns receive a different pattern, creating location-specific driving characteristics that prevent synchronized switching and dynamic dark lines, thus improving display reliability without sacrificing manufacturing efficiency.
Data Source
AI summary
An array substrate and a display panel are provided. The array substrate includes pixel units arranged in an array, and the pixel units include at least two sub-pixels in a same row. Driving polarities of sub-pixels in a same pixel unit are same. The driving polarities include a positive frame driving and a negative frame driving, wherein in a row direction, driving polarities of sub-pixels of adjacent pixel units are different, and in a column direction, driving polarities of adjacent first-row pixel units and second-row pixel units are different.