Array Substrate Segmentation for Charging Ratio in LCD Panels
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Solution Overview
Problem
In large-size liquid crystal display panels, the increased storage capacitance of sub-pixels results in a lower charging ratio, leading to incomplete charging and image quality degradation, including Mura phenomena due to uneven lightness.
Innovation Solution
The array substrate is designed with multiple sub-pixel electrodes connected via switching elements, such as thin film transistors, which receive the same data signal, reducing storage capacitance and improving the charging ratio by dividing each sub-pixel into areas with shared gate and source electrodes, and a gate line positioned between these areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the area of sub-pixel becomes larger to increase storage capacitance, then the charging ratio decreases, but larger area is needed for large-size display panels
Solution Approach 1:
The patent divides each sub-pixel into multiple sub-pixel areas (first sub-pixel area and second sub-pixel area), with each area having its own sub-pixel electrode and thin film transistor. This segmentation allows the storage capacitance to be distributed across multiple smaller capacitances while maintaining the total pixel area, thereby improving the charging ratio without reducing the overall display size.
2Productivity
If the frame rate is kept constant for large-size panels, then the charging time becomes insufficient, but image quality degrades with Mura phenomena
Solution Approach 1:
By segmenting the sub-pixel into multiple areas with separate thin film transistors, the patent enables parallel charging paths that reduce the overall charging time required for each pixel. This allows the display to maintain constant frame rates while achieving sufficient charging within the available time, preventing Mura phenomena and maintaining image quality.
Data Source
AI summary
It is provided an array substrate and a method for driving the array substrate, and a liquid crystal display panel. The array substrate includes: a plurality of sub-pixels formed on a substrate in a matrix form; a plurality of data lines each configured to provide a signal to one column of sub-pixels of the plurality of sub-pixels; and a plurality of gate lines each configured to provide a gate line signal to one row of sub-pixels of the plurality of sub-pixels, wherein each of the plurality of sub-pixels includes at least two sub-pixel electrodes, and each of the at least two sub-pixel electrodes receives a data signal from the same one of the plurality of data lines via a corresponding switching element.