Dual Power Supply Switching for LED Display Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power supply devices for electronic signs lack alternative power sourcing and stable backup in case of operating issues such as undervoltage or partial power interruptions, which can affect the operation of LED display panels.
Innovation Solution
A dual power supply switching system with dual functioning load-sharing power supplies and onboard microcontrollers in each LED display module, where odd and even address modules are powered by separate supplies, and solid state switches ensure seamless switching between power sources in case of abnormalities, with an adjustable switching regulator for voltage regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single power supply is used for LED display modules, then the device complexity is reduced, but the reliability deteriorates due to lack of backup power source
Solution Approach 1:
The system divides the LED display modules into two groups based on address parity (odd/even), with each group connected to a separate power supply. This segmentation allows independent power sourcing and enables selective switching between power supplies based on failure conditions, thereby improving reliability without requiring a complex centralized backup system.
Solution Approach 2:
The microcontroller monitors voltage parameters and dynamically changes the power supply configuration by switching between single-power-supply mode and dual-power-supply mode based on detected abnormal conditions. This parameter-based control enables the system to adapt its complexity level according to operational needs, maintaining simplicity during normal operation while providing redundancy when required.
2Reliability
If dual power supplies with switching capability are implemented, then the reliability is improved through backup power sourcing, but the device complexity increases due to additional switching components and control circuitry
Solution Approach 1:
Each LED display module incorporates its own microcontroller that autonomously monitors power supply voltage and performs switching operations without requiring external control. This self-service approach distributes the control complexity across multiple simple units rather than requiring a complex centralized switching system, thereby achieving high reliability with manageable overall system complexity.
Solution Approach 2:
The system pre-configures dual power supplies and switching capability during installation, but the actual switching action is only taken when abnormal conditions are detected. This preliminary preparation ensures immediate failover capability while keeping the switching mechanism dormant during normal operation, thus maintaining simplicity while ensuring reliability readiness.
3Reliability
If voltage monitoring and switching control are implemented at each LED display module, then the reliability is improved through localized fault detection and isolation, but the device complexity increases due to onboard microcontrollers and switching components
Solution Approach 1:
The system segments the fault detection and control functions into individual LED display modules, with each module containing its own microcontroller for localized monitoring and switching. This segmentation isolates faults to specific modules, preventing system-wide failures while distributing the control complexity across many simple, identical units that can be manufactured and tested independently.
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
Provides 100% power supply redundancy, ensuring continuous operation by switching to a functional power source during failures and optimizing voltage for LED display modules, thereby preventing disruptions due to power anomalies.
Implementation Method 1
adjusts an adjustable switching regulator providing DC/DC conversion
Implementation Method 2
solid state switches in each LED display module internally disconnect the substandard or nonfunctioning power supply source and internally connect the remaining useable power supply source
Data Source
AI summary
A dual power supply switching system for use in an electronic sign where independent suitably sized power supplies each capable of independently powering an entire plurality of LED display modules supply power on an alternating distributed basis to the plurality of LED display modules. A microcontroller having an odd or even address on each LED display module controls the connection of the respective LED display module to a particular power supply by controlling onboard solid state switches and, upon sensing an inadequate power source supply, switches to the other power supply to re-establish power to the LED display module.