Asymmetric Pixel Electrode Structure for Stable High-Resolution Grayscale
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Solution Overview
Problem
High-resolution liquid crystal displays face issues with asymmetric pixel voltage pulling due to small storage capacitance, leading to severe grayscale V-crosstalk, which affects display quality.
Innovation Solution
A pixel electrode structure with alternating sub-conductive parts, where the sum of lengths of first connection strips is adjusted to balance lateral capacitance, ensuring equal capacitance on both sides to reduce grayscale V-crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution pixels with small pitch are used, then display resolution is improved, but storage capacitance decreases causing asymmetric voltage pulling and grayscale V-crosstalk
Solution Approach 1:
The patent applies asymmetry by designing different connection strip configurations on opposite sides of the pixel electrode. Specifically, the first connection strip has a different length than the second connection strip, creating asymmetric capacitance distribution that compensates for the asymmetric voltage pulling effect caused by small pixel pitch. This asymmetric design allows one side to have larger capacitance to counterbalance the stronger voltage pulling on that side, thereby reducing grayscale V-crosstalk and improving display uniformity.
2Area of moving object
If pixel pitch is reduced for high resolution, then display density is improved, but storage capacitance becomes too small to maintain stable pixel voltage
Solution Approach 1:
The patent applies local quality by creating non-uniform capacitance distribution across different regions of the pixel electrode. The connection strips are designed with different lengths and configurations on opposite sides, providing locally optimized capacitance values. This allows each side of the pixel electrode to have appropriate capacitance tailored to its specific voltage pulling characteristics, thereby maintaining stable pixel voltage despite the overall small pixel pitch and limited storage capacitance.
Data Source
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AI summary
A pixel electrode (10), an array substrate and a display apparatus. The pixel electrode (10) comprises: a first edge conductive portion (101) and a second edge conductive portion (102) arranged at an interval in a first direction (Y), and a main conductive portion which comprises at least one first group of conductive sub-portions and at least one second group of conductive sub-portions, wherein the first group of conductive sub-portions comprises a first connecting strip (103) and a first slot (S 1), with the end of the first slot (S 1) that is away from the first connecting strip (103) being an open end; the second group of conductive sub-portions comprises a second connecting strip (105), which is located on the side of the first slot (S1) that is away from the first connecting strip (103), and is connected to the first group of conductive sub-portions, and the second group of conductive sub-portions has a second slot (S2), with the end of the second slot (S2) that is away from the second connecting strip (105) being an open end; and the sum of the lengths of the first connecting strips (103) in the first groups of conductive sub-portions is less than the sum of the lengths of the second connecting strips (105) in the second groups of conductive sub-portions.