LCD Timing Controller Inversion Method Switching for Crosstalk Reduction
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Solution Overview
Problem
Liquid crystal display devices experience horizontal crosstalk noise when driving a liquid crystal panel using certain inversion methods, which affects image quality and display performance.
Innovation Solution
An apparatus and method for controlling the driving of a liquid crystal display device that recognizes shutdown patterns and switches to alternative inversion methods, such as the square inversion method or horizontal two dot inversion method, to prevent crosstalk noise by using a timing controller, gate driver, and data driver to process and convert RGB data, ensuring no horizontal crosstalk occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a certain inversion method (e.g., line inversion, column inversion, or dot inversion) is used to drive the liquid crystal panel, then the liquid crystal alignment is improved and picture quality is enhanced, but horizontal crosstalk noise occurs when shutdown patterns are displayed
Solution Approach 1:
The patent applies the dynamics principle by enabling the liquid crystal display device to dynamically switch between different inversion driving methods based on the detected shutdown pattern. The timing controller monitors the display content and automatically transitions from a standard inversion method (which causes crosstalk with shutdown patterns) to an alternative inversion method (which eliminates crosstalk), thereby adapting the driving method to the current display situation.
Solution Approach 2:
The patent implements parameter changes by modifying the inversion driving method parameters when a shutdown pattern is detected. Specifically, it changes the phase inversion pattern applied to the liquid crystal pixels - switching from a conventional inversion scheme to an alternative scheme that prevents common voltage shifts. This parameter change in the driving method eliminates the horizontal crosstalk while maintaining proper liquid crystal alignment.
2Stability of the object's composition
If the inversion method is fixed to maintain consistent liquid crystal alignment, then picture quality is maintained, but the device becomes sensitive to shutdown patterns causing crosstalk
Solution Approach 1:
The patent resolves this contradiction by introducing dynamic adaptability to the inversion method. Instead of using a fixed inversion method, the timing controller continuously monitors for shutdown patterns and dynamically switches to an alternative inversion method when detected. This dynamic approach maintains liquid crystal alignment consistency while eliminating operational sensitivity to shutdown patterns.
Solution Approach 2:
The patent applies feedback by implementing a detection mechanism that monitors display content for shutdown patterns. When a shutdown pattern is detected, the system provides feedback to the timing controller, which then switches to an alternative inversion method. This feedback loop ensures that the inversion method adapts to maintain reliable operation across different display scenarios while preserving liquid crystal alignment consistency.
3Use of energy by moving object
If a standard inversion method is used for normal display operation, then power consumption is optimized and picture quality is maintained, but crosstalk noise is generated around shutdown patterns
Solution Approach 1:
The patent uses dynamics to optimize power consumption while eliminating crosstalk. The device operates in a standard inversion mode during normal display operation (maintaining power efficiency) and dynamically switches to an alternative inversion mode only when shutdown patterns are detected (eliminating crosstalk). This dynamic switching ensures power consumption is optimized for the majority of operation while crosstalk is eliminated when necessary.
Solution Approach 2:
The patent extracts the crosstalk-causing condition by identifying and isolating the specific scenario (shutdown pattern display) that generates horizontal crosstalk. By detecting shutdown patterns and selectively applying an alternative inversion method only in these extracted conditions, the patent eliminates crosstalk noise while maintaining the power-efficient standard inversion method for all other display operations.
Data Source
AI summary
The present invention involves a technique of recognizing a demand for displaying a shutdown pattern when driving a liquid crystal panel in an inversion method and converting the inversion method into another inversion method causing no horizontal crosstalk. The present invention is achieved by providing an apparatus for controlling driving of a liquid crystal display device, comprising: a timing controller for processing input RGB data by a certain inversion method to supply the data to a data driver and, upon inputting of RGB data of a shutdown pattern, converting the RGB data by an inversion driving method causing no crosstalk to supply the data; a gate driver for outputting gate signals to each gate line of a liquid crystal panel in response to a gate signal control signal; and a data driver for supplying data voltages to each data line of the liquid crystal panel in response to a data signal control signal.