Display Panel Vcom-Flicker Curve Intersection for Optimal Voltage
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Solution Overview
Problem
Current methods for determining the optimal common voltage for display panels are time- and labor-consuming, especially when using manual point-by-point measurement or automated point-by-point voltage searching, which inefficiencies affect the stability and service life of displays due to flicker issues.
Innovation Solution
A method and system that acquire a first and second common voltage for fitting curves, determining flicker corresponding to these voltages, and calculating the intersection of Vcom-Flicker curves to find the actual optimal common voltage, which is less than the theoretical optimal voltage, thereby reducing the time and labor required to determine the optimal voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual point-by-point measurement method is used to determine optimal common voltage, then measurement accuracy can be achieved, but time consumption and labor cost increase significantly
Solution Approach 1:
The patent replaces manual mechanical measurement operations with an automated detection system that uses a color analyzer to measure flicker and a control device to automatically adjust voltage, thereby eliminating manual labor and significantly reducing time consumption while maintaining measurement accuracy
Solution Approach 2:
The patent implements continuous automatic voltage adjustment and flicker measurement rather than discrete manual point-by-point checking. The control device continuously adjusts the common voltage based on real-time flicker feedback, enabling the system to quickly converge to the optimal voltage without the time-consuming manual searching process
2Ease of operation
If automated point-by-point voltage searching method is used, then labor cost is reduced, but time consumption remains high
Solution Approach 1:
The patent establishes a closed-loop feedback system where the color analyzer continuously measures flicker and feeds this information back to the control device, which then automatically adjusts the common voltage. This feedback mechanism enables the system to quickly identify the optimal voltage by responding to real-time flicker changes, dramatically reducing the searching time compared to automated point-by-point methods
Solution Approach 2:
The patent transforms the static point-by-point voltage searching approach into a dynamic adaptive process. The control device dynamically adjusts the voltage based on real-time flicker measurements, allowing the system to adaptively converge to the optimal voltage rather than methodically checking each point, thereby significantly reducing the time required
3Productivity
If common voltage is not optimized, then display panel can operate, but flicker occurs reducing display quality and service life
Solution Approach 1:
The patent optimizes the common voltage parameter to eliminate flicker. By precisely adjusting the common voltage to the optimal value through the automated feedback system, the patent resolves the anodic-cathodic voltage inconsistency that causes flicker, thereby improving display stability and extending service life while maintaining full operational capability
Data Source
AI summary
The present application provides a method, a device and a system for determining an actual option common voltage of a display panel. The method for determining the actual option common voltage of the display panel includes the following steps: acquiring a first common voltage and a second common voltage for fitting a curve; acquiring a first flicker corresponding to the first common voltage and a second flicker corresponding to the second common voltage; acquiring a first Vcom-Flicker curve according to the first common voltage and the first flicker, and acquiring a second Vcom-Flicker curve according to the second common voltage and the second flicker; and determining a common voltage at an intersection of the first Vcom-Flicker curve and the second Vcom-Flicker curve, in which the common voltage at the intersection is the actual option common voltage.