Six-Switch Power Converter for Full-Range LED Backlight Voltage
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Solution Overview
Problem
Notebook computers face challenges in power management, particularly in larger devices that require more power to drive additional hardware, leading to increased battery size and weight, while smaller devices need less power, resulting in inefficient battery usage.
Innovation Solution
A power converter design that couples multiple switches to an inductor and capacitors to achieve full-range voltage application without additional switches, maintaining power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If larger notebook computers use higher power to drive more hardware and devices, then the power output capability is improved, but the battery capacity and weight increase
Solution Approach 1:
The patent changes the voltage parameter through a multi-stage switching converter that can operate in different modes (boost, buck, buck-boost) to provide full-range voltage output. This allows the system to deliver high power when needed without requiring proportionally larger battery capacity, as the converter efficiently transforms the available voltage range to meet varying power demands of different display sizes and hardware configurations.
2Power
If larger notebook computers require more or larger capacity batteries, then the power supply capability is improved, but the device size and weight increase
Solution Approach 1:
The switching converter is designed with multi-functionality to handle various operating conditions and voltage ranges through different switching modes. This universal design allows a single battery configuration to support multiple power requirements, eliminating the need for different battery sizes across different notebook models while maintaining adequate power supply capability for various hardware configurations.
3Volume of moving object
If smaller notebook computers use smaller capacity batteries, then the device size and weight are reduced, but the power supply capability decreases
Solution Approach 1:
The switching converter efficiently transforms the limited voltage range from smaller batteries into adequate power output by utilizing multiple switching modes (boost, buck, buck-boost). This parameter transformation capability allows smaller notebooks to maintain sufficient power supply for their reduced hardware requirements without compromising battery size, achieving optimal balance between portability and power needs.
4Adaptability or versatility
If a power converter uses additional switches to achieve full-range voltage application, then the voltage adaptability is improved, but the device complexity increases
Solution Approach 1:
The switching converter achieves full-range voltage adaptability through a universal circuit topology that can operate in multiple modes (boost, buck, buck-boost) using a standardized six-switch configuration. This multi-functional design provides comprehensive voltage coverage for different display sizes and power requirements while maintaining reasonable complexity through systematic switch arrangement and control logic.
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 solution allows for efficient power management across varying device sizes by boosting input voltage to generate output voltage suitable for LED backlight displays, reducing the need for larger batteries and enhancing power efficiency.
Implementation Method 1
A power converter couples switches to two ends of an inductor
Implementation Method 2
The first capacitor has a first terminal and a second terminal
Data Source
AI summary
A power converter includes an input, an output, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, and a sixth switch. The first switch and the second switch are coupled between the input and a reference voltage. The third switch is coupled between a first capacitor and the fourth switch. The first capacitor is coupled to the reference voltage. The fourth switch is coupled between the output and the third switch. A terminal of a second capacitor is coupled between the third switch and the fourth switch, and another terminal of the second capacitor is coupled between the first switch and the second switch through an inductor. The fifth switch is coupled between the reference voltage and the common node of the inductor and the second capacitor. The sixth switch is coupled between the common node and the first capacitor.