Array Substrate Automatic VCOM Voltage Stabilization
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Solution Overview
Problem
Existing liquid crystal display panels face issues with optimal common electrode signal (VCOM) adjustment, leading to suboptimal display quality, flicker, and DC residual, which requires manual or machine-based adjustments increasing costs and affecting competitiveness.
Innovation Solution
An array substrate design with interleaved gate and data lines, pixel electrodes, and a common electrode connected via thin film transistors, allowing for automatic stabilization of the common electrode voltage between positive and negative pixel electrode voltages, eliminating the need for additional power supply circuits or machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual or machine-based VCOM signal adjustment is performed, then display quality is improved, but production costs increase and productivity decreases
Solution Approach 1:
The patent implements a self-service mechanism where the common electrode automatically adjusts its own voltage signal through internal circuitry. The common electrode is connected to pixel electrodes via thin film transistors, forming a feedback loop that automatically stabilizes the VCOM signal without requiring external manual or machine intervention, thereby eliminating the trade-off between precision and productivity
Solution Approach 2:
The patent employs a feedback mechanism where the common electrode voltage is automatically regulated based on the state of pixel electrodes. The thin film transistors connect the common electrode to multiple pixel electrodes, creating a system where voltage adjustments are automatically made to maintain optimal VCOM levels, eliminating the need for costly external adjustment equipment while maintaining high precision
2Manufacturing precision
If manual or machine-based VCOM signal adjustment is performed, then display quality is improved, but production costs increase
Solution Approach 1:
The common electrode is designed to automatically regulate its own voltage through internally connected thin film transistors and pixel electrodes, eliminating the need for external adjustment machines or manual intervention. This self-service approach maintains high VCOM precision while avoiding the added complexity and cost of external adjustment systems
Solution Approach 2:
The patent merges the VCOM adjustment function into the existing common electrode structure by connecting it directly to pixel electrodes through thin film transistors. This integration eliminates the need for separate adjustment equipment, reducing both device complexity and production costs while maintaining precise VCOM control
Data Source
AI summary
Disclosed are an array substrate and a liquid crystal display panel. The array substrate includes a plurality of gate lines and a plurality of data lines. The plurality of gate lines and the plurality of data lines are interleaved to form a plurality of pixel areas, and a pixel electrode is formed in each of the pixel areas. The pixel electrode is connected to a corresponding gate line and a corresponding data line via a thin film transistor. The array substrate further includes a common electrode, which is connected to a first pixel electrode and a second electrode via a thin film transistor. A signal in the first pixel electrode and a signal in the second pixel electrode have opposite polarities. The array substrate realizes automatic adjustment of a common electrode voltage, and corresponding regulators or machines are no longer needed. It is favorable to improvement of productivity and competitiveness of the array substrate and the liquid crystal display panel.