Display Panel Data-Line Compensation for Frequency-Stable Brightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels experience increased brightness when the display frequency changes from high to low, leading to unstable display quality and user experience.
Innovation Solution
A method for driving a display panel that includes loading a gate-on voltage during the data refresh phase and a gate-off voltage along with a compensation voltage during the blanking time phase, where the compensation voltage is adjusted based on the polarity and voltage difference relative to the common electrode voltage to stabilize brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display frequency is reduced from high to low, then power consumption is reduced, but brightness increases and display quality becomes unstable
Solution Approach 1:
The patent applies preliminary action by loading the compensation voltage onto the data line during the blanking time phase before the next data refresh phase begins. This advance compensation ensures that when the display frequency changes from high to low, the brightness increase is pre-corrected, allowing the system to operate at lower frequency without brightness instability while maintaining stable display quality.
2Use of energy by moving object
If the display frequency is reduced from high to low, then power consumption is reduced, but display quality becomes unstable
Solution Approach 1:
The patent implements feedback by introducing a compensation voltage that is calculated based on the relationship between the data voltage and common electrode voltage. The compensation voltage is loaded during the blanking time phase to counteract the brightness changes that occur when switching from high to low display frequency. This feedback mechanism ensures that display quality remains stable across different frequency operations, resolving the contradiction between power consumption reduction and display quality stability.
Data Source
AI summary
The method includes, during a data refresh stage of at least one display frame, loading a gate turn-on voltage to a gate line, and loading, on each data line, a data voltage of an image to be displayed, so that each sub-pixel inputs a corresponding data voltage, and during a blanking time period, loading a gate turn-off voltage to a gate line, and loading a compensation voltage to each data line. When a data voltage in a sub-pixel connected to a data line is greater than a common electrode voltage, a compensation voltage is less than the data voltage in the sub-pixel connected to the data line, and/or when the data voltage in the sub-pixel is less than the common electrode voltage, the compensation voltage is greater than the data voltage in the sub-pixel.