Pixel Voltage Compensation for LCD Cross-Talk Suppression
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Solution Overview
Problem
Liquid crystal display devices experience a voltage cross-talk phenomenon due to capacitance between pixel electrodes and data lines, leading to differences in actual displayed brightness of pixels showing the same gray scale, affecting the display effect.
Innovation Solution
A pixel voltage compensation method that determines capacitance between data lines and pixel electrodes, detects voltage differences, calculates variations in driving voltage, and compensates the pixel voltage accordingly to suppress cross-talk by adjusting the driving voltage based on these factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data lines and gate lines are used to drive pixel electrodes in a conventional liquid crystal display, then the display can show images row by row, but voltage cross-talk occurs between adjacent data lines and pixel electrodes causing brightness differences
Solution Approach 1:
The patent applies preliminary action by calculating and compensating for voltage variations before they affect the pixel electrode display. The system pre-calculates the voltage change caused by capacitance coupling from adjacent data lines during the charging period, and applies compensation voltage in advance to eliminate the cross-talk effect before it manifests as brightness difference in the displayed image.
2Object-affected harmful factors
If capacitance coupling between data lines and pixel electrodes is considered, then voltage cross-talk can be compensated, but calculation complexity increases
Solution Approach 1:
The patent applies local quality by focusing the compensation calculation only on the specific capacitance coupling between adjacent data lines and the target pixel electrode during the charging period. Instead of calculating all possible capacitive couplings in the display, the system selectively computes only the relevant voltage variation from neighboring data lines that actually affect the target pixel, thereby reducing overall calculation complexity while maintaining compensation effectiveness.
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 the difference in displayed brightness between pixels showing the same gray scale, thereby improving the display effect by compensating for voltage variations caused by capacitance and voltage differences.
Implementation Method 1
there is a certain capacitance between a pixel electrode and a data line adjacent to the pixel electrode
Data Source
AI summary
A pixel voltage compensation method, a pixel voltage compensator device and a display device are provided. The compensation method includes: determining a capacitance between at least one data line adjacent to a target pixel electrode and the target pixel electrode; detecting a voltage difference between a driving voltage of the data line and a driving voltage of the target pixel electrode in a period from a start of present charging of the target pixel electrode to a start of next charging; calculating a variation of the driving voltage of the target pixel electrode caused by the capacitance and the voltage difference; and compensating for the driving voltage of the target pixel electrode according to the variation. This compensation method can suppress the phenomenon of voltage cross-talk, and thus can improve the display effect of the display device.