Mini LED Power Supply Segmentation for Voltage Stability
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Solution Overview
Problem
In Mini-LED television power supplies, the interaction between +12V and +28V voltages during high power output leads to unpredictable results, complicating research, development, and debugging due to shared transformer usage.
Innovation Solution
A Mini-LED driving power supply with a power supply board comprising a first and second conversion module, where the first module outputs +12V and +20V voltages to the mainboard based on a power-on/off signal, and the second module converts high-voltage direct current into +28V for the Mini-LED screen, ensuring independent voltage outputs to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared transformer is used to output both +12V and +28V voltages, then device complexity is reduced, but voltage stability and reliability deteriorate due to mutual interference during high power output
Solution Approach 1:
The power supply system is divided into two independent conversion modules: a first conversion module for generating +12V and +20V voltages, and a second conversion module for generating +28V voltage. Each module has its own transformer and control circuit, eliminating mutual interference between voltage outputs while maintaining manageable system complexity through modular design.
2Ease of manufacture
If a shared transformer is used for multiple voltage outputs, then manufacturing cost is reduced, but debugging time and development complexity increase due to unpredictable voltage interactions
Solution Approach 1:
By segmenting the power supply into independent conversion modules with separate transformers, the system eliminates unpredictable voltage interactions that complicate debugging. Each module can be tested and optimized independently, significantly reducing development time while accepting the cost of additional transformers.
3Reliability
If independent conversion modules are used for each voltage output, then voltage stability and reliability are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The power supply is segmented into independent conversion modules, each responsible for specific voltage outputs. This segmentation ensures that voltage fluctuations or failures in one module do not affect others, improving overall system reliability while maintaining organized complexity through clear functional separation.
Solution Approach 2:
Each conversion module operates dynamically with independent control circuits that can adjust their operation based on load conditions. The mainboard can independently control the on/off states of different modules, allowing flexible power management and further simplifying the control of complex multi-voltage systems.
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 stable and independent operation of voltage outputs, preventing interference between lines and ensuring normal system operation, improved electrical performance, and extended service life of the Mini-LED television.
Implementation Method 1
the first conversion module is connected to the mainboard and the second conversion module, applied to outputting a power supply voltage to power the mainboard after the first conversion module is powered on
Implementation Method 2
the second conversion module is connected to the MINI LED screen, applied to converting the high-voltage direct current into a third voltage and outputting the third voltage to the MINI LED screen
Data Source
AI summary
A MINI LED driving power supply and a MINI LED television, the MINI LED driving power supply includes a power supply board connecting with a mainboard and a MINI LED screen, the power supply board includes a first conversion module and a second conversion module; the first conversion module outputs power supply voltage to power the mainboard after the first conversion module is turned on, outputs first voltage and second voltage to power the mainboard according to a power-on/off signal output by the mainboard, and outputs first power supply and high-voltage direct current to the second conversion module; the second conversion module converts high-voltage direct current into third voltage and outputs the third voltage to the MINI LED screen according to enable signal output by the mainboard and the first power supply, to light up MINI LED screen.