Array Substrate Data Line Odd-Even Row Polarity Inversion
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Solution Overview
Problem
High refresh rate liquid crystal panels in TFT-LCDs suffer from a greenish display phenomenon due to voltage fluctuations on the common electrode, leading to color distortion and increased power consumption, which is exacerbated by the existing drive modes like dot inversion and column inversion.
Innovation Solution
The array substrate design includes two adjacent data lines disposed side by side between pixel units, with one line connected to odd rows and the other to even rows, ensuring opposite voltage fluctuations across the common electrodes, thereby reducing color distortion and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If dot inversion or column inversion is used for polarity inversion, then power consumption is reduced, but voltage fluctuations on the common electrode cause color distortion and greenish display
Solution Approach 1:
The pixel array is divided into multiple pixel regions, with different polarity inversion schemes applied to different regions. Specifically, some pixel regions use dot inversion while others use column inversion, allowing the system to reduce overall power consumption while minimizing voltage fluctuations that cause color distortion in any single region.
Solution Approach 2:
Different polarity inversion methods are applied to different spatial locations (pixel regions) based on local requirements. The patent implements local quality by allowing adjacent pixel regions to use different inversion schemes, thereby optimizing both power consumption and color accuracy in different areas of the display.
2Productivity
If high refresh rate is implemented, then display quality is improved, but voltage fluctuations on the common electrode are exacerbated, worsening color distortion
Solution Approach 1:
The display is segmented into multiple pixel regions that can be driven with different polarity inversion schemes simultaneously. This segmentation allows the system to maintain high refresh rates while distributing voltage fluctuations across different regions, preventing the exacerbation of color distortion that would occur in a uniform high-refresh-rate system.
Solution Approach 2:
The patent employs periodic polarity inversion patterns across different pixel regions, where the inversion timing and pattern vary by region. This periodic action with varying periods across regions helps to cancel out voltage fluctuations on the common electrode, thereby maintaining color accuracy at high refresh rates.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively alleviates the greenish display issue by compensating voltage fluctuations, improving display quality and reducing power consumption, especially in high refresh rate TFT-LCDs.
Implementation Method 1
During the charging and discharging of the memory capacitor, due to capacitive coupling, voltage on the common electrode fluctuates.
Data Source
AI summary
The present disclosure provides an array substrate, a display device, and a drive method for the display device. The array substrate comprises gate lines and data lines and a plurality of pixel units defined by intersection of the gate lines and the data lines with one another; wherein the plurality of pixel units is divided into a number of pixel regions each of which includes at least one column of the pixel units and is driven by a data line driving unit; wherein, first and second data lines are disposed side by side between two adjacent pixel units that are respectively located at the margins of any two adjacent pixel regions; and, one of the first and the second data lines is connected with the pixel units adjacent thereto and located in odd rows while the other is connected with the pixel units adjacent thereto and located in even rows.