Pixel Electrode Layout for Grayscale V-Crosstalk Reduction
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Solution Overview
Problem
High-resolution liquid crystal panels face issues with asymmetric pixel voltage pulling due to small pixel pitch and storage capacitance, leading to severe grayscale V-crosstalk, which affects display quality.
Innovation Solution
A pixel electrode design featuring alternating first and second groups of sub-conductive parts with specific slit configurations and connection strips, where the sum of lengths of first connection strips is less than that of second connection strips, to balance lateral capacitance and reduce V-crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution pixels with small pixel pitch are used, then display resolution is improved, but storage capacitance becomes small leading to asymmetric voltage pulling and severe grayscale V-Crosstalk
Solution Approach 1:
The pixel electrode is divided into multiple sub-conductive parts (first and second groups) arranged alternately in the first direction. Each group contains connection strips with slits that can be independently configured. This segmentation allows separate optimization of capacitance on left and right sides of the pixel electrode, enabling asymmetric capacitance compensation to counterbalance the asymmetric voltage pulling effect caused by small pixel pitch in high-resolution displays.
2Quantity of substance
If pixel pitch is reduced for high-resolution displays, then display density is improved, but storage capacitance decreases causing voltage instability
Solution Approach 1:
The invention applies different capacitance compensation strategies to different regions of the pixel electrode. The first and second groups of sub-conductive parts have different total lengths in the first direction, with each group's capacitance contribution tailored to local requirements. The slits in connection strips further adjust local capacitance distribution. This local quality approach ensures voltage stability across the pixel despite reduced overall storage capacitance from smaller pixel pitch.
3Ease of manufacture
If symmetric electrode structure is used, then manufacturing is simplified, but asymmetric voltage pulling cannot be compensated
Solution Approach 1:
The invention deliberately employs asymmetric structure in the pixel electrode design. The first group of sub-conductive parts and the second group have different total lengths in the first direction, creating asymmetric capacitance distribution. The slits in connection strips are positioned differently in each group. This asymmetric configuration is specifically designed to compensate for asymmetric voltage pulling effects, maintaining voltage symmetry despite the inherent asymmetry in the structure.
Data Source
AI summary
A pixel electrode, an array substrate, and a display device are provided. The pixel electrode includes: a first edge conductive part and a second edge conductive part arranged at intervals in a first direction, and a main conductive part at least partially located between the first edge conductive part and the second edge conductive part. The main conductive part is respectively connected to the first edge conductive part and the second edge conductive part. The main conductive part includes at least one first group of sub-conductive parts and at least one second group of sub-conductive parts. The first group of sub-conductive parts and the second group of sub-conductive parts are arranged alternately in the first direction.