LCD Driving Device Charge Sharing Control
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Solution Overview
Problem
The increasing power consumption and interior temperature of liquid crystal display (LCD) driving systems, resulting from improved resolutions and refreshing speeds, reduce the reliability of the driving system and necessitate a solution to optimize power usage.
Innovation Solution
A driving device comprising a driving module that generates signals based on next channel data and adjusts coupling relationships using a charge sharing control signal, and a timing control module that selects appropriate charge sharing control commands to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the resolution and refreshing speed of the LCD are improved, then the display quality and performance are enhanced, but the power consumption of the driving system is dramatically increased
Solution Approach 1:
The patent implements dynamic adjustment of driving signal coupling relationships based on actual display content changes. The driving module selectively couples or decouples data lines between adjacent pixels depending on whether the display content changes, transforming the static driving approach into a dynamic one that adapts to content variations, thereby reducing unnecessary power consumption while maintaining high refresh rates
Solution Approach 2:
The patent changes the coupling state parameter of driving signals between adjacent pixels based on content variation detection. By switching between coupled and decoupled states dynamically, the system adjusts electrical parameters to minimize power consumption during periods of no content change while maintaining full performance during content updates
2Productivity
If the resolution and refreshing speed of the LCD are improved, then the display quality and performance are enhanced, but the interior temperature of the driving system is violently increased
Solution Approach 1:
The system dynamically adjusts the coupling relationships of driving signals based on content changes, reducing unnecessary current flow and heat generation during periods of static display content. This dynamic adaptation prevents violent temperature increases while maintaining high refreshing speed capability when content changes occur
Solution Approach 2:
The patent converts the potential harmful effect of continuous high-power driving into a beneficial reduced-power state by detecting content stability. When content remains unchanged, the system intentionally reduces driving signal coupling, transforming what would be wasted energy into heat into an opportunity for power savings, thereby converting a harmful thermal effect into a beneficial power reduction
3Reliability
If the power consumption is reduced by adjusting signal coupling, then the reliability is enhanced, but the display performance may be compromised
Solution Approach 1:
The patent employs feedback mechanisms where the driving module continuously monitors content changes between adjacent pixels and adjusts coupling relationships accordingly. This feedback loop ensures that power consumption is reduced only when appropriate (no content change), while automatically restoring full performance when content changes occur, thus maintaining both reliability and display performance
Solution Approach 2:
The system performs preliminary detection of content changes before adjusting driving signal coupling. By anticipating whether power reduction is appropriate in advance, the system avoids compromising display performance while achieving power savings, ensuring that performance is only reduced when it is safe to do so
Data Source
AI summary
A driving device includes a driving module, for generating a plurality of driving signals according to a plurality of next channel data and adjusting coupling relationships of the plurality of driving signals according to a charge sharing control signal; and a timing control module, for generating the plurality of next channel data and selecting one of a plurality of charge sharing control commands as the charge sharing control signal.