Dual Power Module Overload Protection for Large-Screen Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large-screen display devices with dual power modules have large power module volumes and high manufacturing costs due to their rating requirements, and failures in one module can go unnoticed, affecting the entire system.
Innovation Solution
A display device with a first and second power module that includes an overload prevention circuit, where the first power module cuts off power when current exceeds a threshold and adjusts the threshold based on the state of the second power module, and a processor reduces luminance if an abnormality is detected, ensuring stable power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual power modules are implemented to cover the full rating of the large-screen display device, then system reliability is improved through load sharing and failure tolerance, but the volume and manufacturing cost of each power module increases
Solution Approach 1:
The overload criterion is dynamically changed from a first threshold current amount to a second threshold current amount when abnormality is detected in the second power module. This dynamic adjustment allows the first power module to adapt its operating parameters based on system conditions, enabling reduced rated power while maintaining reliability through intelligent control rather than purely hardware-based redundancy
Solution Approach 2:
The patent changes the overload criterion parameter (current threshold) based on the operational state of the second power module. By monitoring the state of the second module and adjusting the threshold accordingly, the system optimizes the rated power requirements of individual modules while preserving the load-sharing capability and failure tolerance that enhance system reliability
2Reliability
If dual power modules are implemented to cover the full rating of the large-screen display device, then failure tolerance is improved, but manufacturing cost increases
Solution Approach 1:
The dynamic adjustment of the overload criterion allows the power modules to operate more efficiently under normal conditions, reducing the required rated power and associated manufacturing costs. The intelligent control mechanism preserves failure tolerance by detecting abnormalities and adapting the system response, eliminating the need for oversized modules while maintaining reliability
Solution Approach 2:
The system employs feedback mechanisms to monitor the state of the second power module and adjust the overload criterion of the first module accordingly. This closed-loop control enables cost-effective design by optimizing module specifications based on actual operational conditions while preserving failure tolerance through real-time adaptation
3Volume of moving object
If the overload criterion is set to a first threshold current amount for normal operation, then power module rating is reduced, but system stability deteriorates when one module fails
Solution Approach 1:
The overload criterion transitions from a static first threshold to a dynamic second threshold based on the operational state of the second power module. This dynamic behavior ensures that when one module fails, the system automatically adjusts to maintain stable power supply through the remaining module, preventing instability while allowing reduced rated power during normal dual-module operation
Solution Approach 2:
The feedback mechanism monitors the operational state of the second power module and provides information to adjust the overload criterion of the first module. This feedback loop maintains power supply stability by detecting failures and adapting the system parameters accordingly, ensuring continuous stable operation even when one module is reduced in rating
Data Source
AI summary
A display device according to an embodiment includes a display, a first power module that outputs a first power, and a second power module that outputs a second power. The first power and the second power are supplied to the display. The first power module is configured to cut off the first power when an amount of input current exceeds an overload criterion, to identify whether the second power module is abnormal based on the second power, and to change the overload criterion from a first threshold current amount to a second threshold current amount that exceeds the first threshold current amount, in an abnormal state of the second power module.