Power Supply Standby Power Reduction via Super Capacitor
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Solution Overview
Problem
Existing power supply technologies consume significant standby power in electric devices, especially when in standby mode, due to continuous operation of internal transformers in switching mode power supplies and limited charging capacity of secondary cells, leading to inefficiencies and increased energy consumption.
Innovation Solution
A power supply system that includes a receiver for remote controllers and a charger to provide driving power, with a power-saving mechanism that switches to a deep sleep mode, utilizing a charger and voltage detector to manage power usage, and a super capacitor to minimize standby power consumption by charging only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a switching mode power supply (SMPS) is used to provide standby power, then standby power can be supplied continuously, but the internal transformer must operate continuously consuming power and efficiency decreases
Solution Approach 1:
The patent implements periodic charging action by charging the secondary cell only when its voltage falls below a threshold value, rather than continuous charging. The charging circuit periodically replenishes the secondary cell's power, allowing the cell to supply standby power intermittently while consuming minimal energy during charging periods.
2Use of energy by moving object
If a secondary cell is used to eliminate standby power consumption, then standby power can be reduced to zero, but the cell discharges after predetermined time and additional charging components are needed
Solution Approach 1:
The patent performs preliminary action by charging the secondary cell in advance during periods when the display apparatus is in sleep mode or normal operation. The charging circuit proactively replenishes the cell's power before complete discharge occurs, ensuring continuous standby power availability without requiring external intervention.
3Use of energy by moving object
If the secondary cell charging quantity is limited, then standby power can be reduced, but the cell cannot supply power indefinitely and requires additional charging components
Solution Approach 1:
The patent implements multi-functionality by designing the charging circuit to serve dual purposes: it charges the secondary cell for standby power supply and simultaneously functions as part of the overall power management system during sleep and normal modes. This integrated approach eliminates the need for separate dedicated charging components.
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
The system reduces standby power consumption to zero by charging the super capacitor only when needed, eliminating unnecessary power conversion and maintaining low manufacturing costs, thereby reducing overall energy consumption and user financial burden.
Implementation Method 1
a super capacitor to minimize standby power consumption by charging only when necessary
Implementation Method 2
a voltage detector to detect the voltage of the power charged in the charger
Data Source
AI summary
A power supply includes: a first switch arranged between an input power supplier and a load; a driving power supplier to receive input power through the first switch and to supply the input power to the load when a current mode of the load is a normal mode; and a power-saving power supplier connected to a power line branched from between the input power supplier and the first switch, the power-saving power supplier generating standby power when the current mode is a standby mode, and including a second switch connected to the power line, a charger to charge power transmitted through the second switch and to output the charged power as the standby power, a voltage detector to detect the voltage of the charged power, and a first controller to receive driving power from the charger and to control operation of the second switch according to the detected voltage.