Source Driver Charge Sharing for LCD Power Reduction
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Solution Overview
Problem
The high power consumption of source drivers during charging in liquid crystal displays is a significant issue, particularly with advancements in high integration and high resolution, necessitating a solution to reduce power consumption.
Innovation Solution
A method and apparatus for controlling source drivers that involve acquiring and calculating voltages during charging, determining power-saving quantities, and controlling switch devices to perform charge sharing among data channels, reducing power consumption by closing switch devices when power-saving thresholds are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high integration and high resolution are implemented in liquid crystal displays, then display quality is improved, but power consumption of source driver increases
Solution Approach 1:
The data channels are divided into multiple channel groups, with each group containing multiple data channels that can be independently controlled. Switch devices are used to connect data channels within the same channel group, enabling segmented charge sharing operations that reduce overall power consumption while maintaining high resolution display capabilities
Solution Approach 2:
The patent dynamically adjusts voltage parameters by acquiring first voltages (current row), second voltages (next row), and calculating third voltages (average). By changing voltage levels and using charge sharing between channels based on these calculated values, the system reduces power consumption while preserving display quality
2Use of energy by moving object
If charge sharing is implemented by closing switch devices, then power consumption is reduced, but data transmission may be affected
Solution Approach 1:
The patent performs preliminary calculations to determine the third voltage (average of first and second voltages) before executing charge sharing operations. This preliminary action ensures that charge sharing is performed at optimal voltage levels, maintaining data integrity while achieving power savings
Solution Approach 2:
The system continuously monitors voltage parameters and uses feedback from acquired first and second voltages to adjust charge sharing operations. The calculated third voltage serves as a feedback mechanism to ensure data transmission reliability is maintained while reducing power consumption
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 power consumption of source drivers by implementing charge sharing, ensuring low power consumption during the charging process and addressing the high power consumption issue in existing technologies.
Implementation Method 1
any two of the plurality of the data channels in the channel group are connected by means of a switch device... each the switch device of a target source driver is controlled to be closed... performing charge sharing among data channels
Data Source
AI summary
Provided in the present disclosure are a method and an apparatus for controlling a source driver, and a display system. The method includes: in a case that the source driver is in a charging state, acquiring a plurality of first voltages and a plurality of second voltages, and calculating a plurality of third voltages; according to each the first voltage, each the corresponding second voltage and the corresponding third voltage, determining, in a case that data of the next row are sent to the data channel after each the switch device is closed, whether a first power-saving quantity is greater than a first predetermined threshold, and/or whether a second power-saving quantity is greater than a second predetermined threshold; and in a case that the first power-saving quantity is greater than the first predetermined threshold, and/or the second power-saving quantity is greater than the second predetermined threshold, controlling each the switch device of a target source driver to be closed, and then sending the data of the next row to each the corresponding data channel, and the target source driver is the source driver whose the first power-saving quantity is greater than the first preset threshold, or all of the source drivers. Therefore, by means of the present disclosure, the problem of high power consumption of a source driver is solved.