Display Panel Flicker Debugging via Dynamic Common Voltage Adjustment
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Solution Overview
Problem
Gaming monitors with FreeSync/G-SYNC technologies often experience screen flicker, which affects gaming and watching experiences, despite improving frame synchronization and refresh rates.
Innovation Solution
A screen flicker debugging method for display panels involving the use of a first and second common voltage, where the voltage difference serves as a reference for liquid-crystal molecule deflection, with the method including acquiring a refresh rate interval, controlling the display to show a flickering picture at the minimum refresh rate, adjusting the reference voltage, and determining the minimum flickering value to set the optimal reference voltage, thereby reducing flicker phenomena across high and low refresh rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FreeSync/G-SYNC technologies are adopted to improve frame synchronization and refresh rates, then gaming experience is enhanced, but screen flicker phenomenon occurs
Solution Approach 1:
The patent applies parameter changes by adjusting the common voltage level of the display panel to eliminate screen flicker. Specifically, it sets the common voltage to different values depending on the refresh rate: 0V for refresh rates of 240Hz or higher, and a non-zero value (such as 3V, 6V, or 9V) for refresh rates below 240Hz. This voltage parameter adjustment resolves the flicker issue while maintaining the benefits of FreeSync/G-SYNC technology across different refresh rate ranges.
2Object-affected harmful factors
If common voltage is adjusted to reduce flicker at low refresh rates, then flicker is reduced, but display performance may be affected at high refresh rates
Solution Approach 1:
The patent implements a dynamic common voltage adjustment strategy that adapts the voltage level based on the operating refresh rate. The system dynamically switches between different voltage configurations: using non-zero common voltage (3V, 6V, or 9V) when operating below 240Hz to reduce flicker, and switching to 0V common voltage when operating at 240Hz or higher to maintain optimal display performance. This dynamic adaptation resolves the contradiction between flicker reduction and performance maintenance across different operating conditions.
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
The method effectively reduces screen flicker by setting the optimal reference voltage, enhancing display panel performance and user experience by minimizing flickering issues at various refresh rates.
Implementation Method 1
A voltage difference between the second common voltage and the first common voltage is configured as a reference voltage for deflection of liquid-crystal molecules
Data Source
AI summary
The present application provides a screen flicker debugging method of a display panel, an apparatus and a system. The display panel includes a first common voltage and a second common voltage. The voltage difference between the second common voltage and the first common voltage is configured as a reference voltage for deflection of the liquid-crystal molecules. The screen flicker debugging method of the display panel includes: acquiring a refresh rate interval of the display panel, and determining a minimum refresh rate; controlling the display panel to display a flickering picture with the minimum refresh rate; adjusting the reference voltage and acquiring flickering values of the flickering picture at different reference voltages; and determining the minimum flickering value and setting the corresponding reference voltage as the optimal reference voltage for the display panel. The flickering phenomenon of the display panel at high and low refresh rates is reduced.