Buck-Boost Converter Voltage Control for HDR Display Power Reduction
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Solution Overview
Problem
Information handling systems face challenges in optimizing power delivery for subsystems with different voltage requirements, leading to power losses when selecting either low-voltage or high-voltage subsystems for optimization.
Innovation Solution
Implementing a buck-boost conversion system controlled by an embedded controller to dynamically adjust voltage based on the frame rate and mode of operation of high-dynamic range displays, using a scalar value to optimize power delivery across varying load points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a low-voltage topology is selected for optimization, then power consumption is reduced for low-voltage subsystems, but power losses increase for high-voltage subsystems
Solution Approach 1:
The system dynamically switches between buck and boost conversion modes based on real-time voltage requirements of different subsystems. The embedded controller monitors voltage demands and adjusts the converter operation accordingly, allowing the power delivery system to adapt its topology rather than being fixed in one state.
Solution Approach 2:
The patent changes the operating parameters of the power conversion system by switching between buck mode (when output voltage needs to be lower than input) and boost mode (when output voltage needs to be higher than input). This parameter change allows the same converter to serve both low-voltage and high-voltage subsystems efficiently.
2Power
If a high-voltage topology is selected for optimization, then power delivery is improved for high-voltage subsystems, but power consumption increases for low-voltage subsystems
Solution Approach 1:
The system dynamically switches between buck and boost conversion modes based on real-time voltage requirements of different subsystems. The embedded controller monitors voltage demands and adjusts the converter operation accordingly, allowing the power delivery system to adapt its topology rather than being fixed in one state.
Solution Approach 2:
The patent changes the operating parameters of the power conversion system by switching between buck mode (when output voltage needs to be lower than input) and boost mode (when output voltage needs to be higher than input). This parameter change allows the same converter to serve both low-voltage and high-voltage subsystems efficiently.
3Device complexity
If fixed voltage topology is used, then system design is simplified, but power efficiency deteriorates across varying load points
Solution Approach 1:
The system dynamically switches between buck and boost conversion modes based on real-time voltage requirements of different subsystems. The embedded controller monitors voltage demands and adjusts the converter operation accordingly, allowing the power delivery system to adapt its topology rather than being fixed in one state.
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
This approach reduces power consumption by optimizing voltage delivery to each subsystem, minimizing battery conversion loss and improving system-wide power efficiency.
Implementation Method 1
control a buck-boost converter to increase or decrease a voltage applied to the backlight based upon a frame rate of a video signal received by the display
Data Source
AI summary
Systems and methods for reducing the power consumption of high-dynamic range (HDR) displays via buck-boost conversion are described. In some embodiments, an information handling system (IHS) may include an embedded controller (EC) and a memory coupled to the EC, the memory having program instructions stored thereon that, upon execution, cause the EC to: determine a characteristic of a display having a backlight, and control a buck-boost converter to increase or decrease a voltage applied to the backlight based upon a frame rate of a video signal received by the display.