Source Driver Charge Sharing for LCD Power Reduction
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Solution Overview
Problem
Current liquid crystal displays lack effective power-saving methods for reducing power consumption, as existing panel structures and source driver output methods do not efficiently manage power usage.
Innovation Solution
A source driver with output channels and a switching unit that selects the lowest power consumption charge-sharing method through a timing controller algorithm, randomly selecting K output channels from 6N channels to perform charge sharing, where K ranges from 0 to 6N, thereby optimizing power usage across different panel structures and output polarity inversion methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional panel structures (Zigzag or Pixel 3-5) are used with standard source driver output methods, then the display functionality is maintained, but power consumption cannot be effectively reduced
Solution Approach 1:
The patent implements dynamic charge-sharing by randomly selecting K output channels from 6N channels to perform charge sharing, where K ranges from 0 to 6N. This dynamic approach adapts the charge-sharing behavior to different operating conditions and panel structures, enabling effective power reduction while maintaining compatibility with various display technologies
Solution Approach 2:
The patent changes the parameter of charge-sharing configuration by allowing flexible selection of K channels out of 6N total channels. This parameter variation enables optimization of power consumption across different panel structures and output polarity inversion methods (1V inversion, 2V inversion, and (2V+1) inversion), resolving the contradiction between power savings and adaptability
2Use of energy by moving object
If charge sharing is performed on all 6N output channels, then power consumption is reduced, but the complexity of control increases
Solution Approach 1:
Instead of requiring charge sharing on all 6N channels, the patent allows partial charge sharing by randomly selecting K channels where K can range from 0 to 6N. This partial action approach reduces power consumption effectively while avoiding the excessive control complexity that would result from managing all channels simultaneously
Solution Approach 2:
The random selection mechanism enables the system to self-configure charge-sharing channels without complex external control. The switching unit automatically performs the charge sharing on selected channels based on random selection, reducing the burden on external control systems while achieving power savings
Data Source
AI summary
A display driving apparatus applied to a panel is disclosed. The panel displays a first image with a first refresh rate. A first refresh cycle corresponding to the first refresh rate includes a refresh period and at least one non-refresh period. The display driving apparatus includes a real-time determination module and a data processing module. The real-time determination module is coupled to the panel and used to immediately determine whether the panel wants to replace the originally displayed first image with a second image during the first refresh cycle. The data processing module is coupled to the real-time determination module and the panel. If a determination result of the real-time determination module is yes, the data processing module immediately controls the panel to start to display the second image at a first time during the first refresh cycle.