Array Substrate Voltage Compensation for Uniform LCD Driving
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Solution Overview
Problem
Liquid crystal display panels experience uneven voltage distribution due to wiring impedance and capacitance, leading to poor display uniformity, split screens, and afterimages, which affect the quality and effectiveness of the display.
Innovation Solution
An array substrate with an acquisition module that measures electrical parameters of wiring groups and adjusts input voltages to ensure equal driving voltages for each data line or scan line, using a driver connected to the acquisition module to provide corresponding input voltages based on measured parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal transmission passes through fan-shaped wiring areas from integrated circuits, then the display area can be driven, but the wiring impedance causes uneven voltage distribution across pixels
Solution Approach 1:
The patent divides the display area into multiple pixel regions, each with its own compensation circuit. The wiring area is segmented into multiple fan-shaped regions, with each region having dedicated compensation circuits that independently measure and adjust voltages for their respective pixel groups, thereby addressing voltage unevenness in a localized manner
Solution Approach 2:
The patent dynamically adjusts voltage parameters by measuring actual voltage values at different pixel positions using compensation circuits. Based on these measurements, the system calculates compensation values and modifies driving voltages in real-time to compensate for wiring-induced voltage drops, transforming fixed voltage transmission into adaptive voltage control
2Productivity
If integrated circuits drive scan and data signals through wiring areas, then pixel display is enabled, but impedance effects cause large voltage differences in the pixel display area
Solution Approach 1:
The patent implements feedback mechanisms where compensation circuits continuously measure voltage values at pixel positions and feed this information back to control circuits. The control circuits then adjust driving signals accordingly, creating a closed-loop system that maintains voltage uniformity despite wiring impedance effects during signal transmission
Solution Approach 2:
The patent introduces compensation circuits as intermediary elements between the integrated circuits and pixel arrays. These compensation circuits act as mediators that measure voltage drops and generate correction signals, thereby isolating the pixel display area from the adverse effects of wiring impedance while maintaining efficient signal transmission
3Power
If different input voltages are applied to scan lines, then driving is achieved, but inconsistent scan signal waveforms cause poor vertical display uniformity
Solution Approach 1:
The patent applies different compensation strategies to different scan line groups based on their specific voltage drop characteristics. Each compensation circuit is configured to address the local voltage unevenness in its corresponding region, allowing tailored voltage adjustments that maintain consistent scan signal waveforms across different vertical regions of the display
4Power
If different input voltages are applied to data lines, then driving is achieved, but poor horizontal display uniformity results
Solution Approach 1:
The patent implements region-specific compensation for data lines, where each compensation circuit measures and adjusts voltages for its corresponding horizontal region. This localized approach ensures that each data line group receives appropriate voltage compensation to maintain uniform horizontal display performance across the entire display area
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 solution improves display uniformity and reduces the occurrence of split screens and other phenomena, enhancing the overall display effect of liquid crystal display panels by ensuring consistent voltage distribution across the panel.
Implementation Method 1
The signal is affected by the impedance of the wiring, so that after the voltage output from the integrated circuit IC passes through the wiring area, the signal voltage difference in the pixel display area is relatively large and uneven
Data Source
AI summary
Disclosed are an array substrate, a liquid crystal display panel, and a control method. The array substrate (1) comprises a plurality of connecting wire assemblies (20) and a driver (30), each connecting wire assembly (20) comprises a wiring group (22) and an acquisition module (21), the acquisition module (21) is used to detect the electrical parameters of the wiring group (22) and feed them back to the driver (30). The present disclosure can adjust the input voltage according to the impedance of the wiring group (20), so that the driving voltage of each data line or each scanning line is the same and the display uniformity can be improved.