Lighting System Standby Power Reduction via AC-DC Circuit Segmentation
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Solution Overview
Problem
Conventional lighting systems consume standby power even after the power source is switched off due to the continuous operation of wireless dimmer control units, leading to unnecessary energy consumption.
Innovation Solution
A lighting system with a main control unit, driver, AC-DC converting circuit, and standby power supply unit that charges the standby power supply in normal mode, switches to standby mode upon receiving a lighting off signal, and periodically checks and maintains voltage levels to minimize standby power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wireless dimmer control unit is continuously operated to enable remote control of lighting devices, then the control functionality is improved, but unnecessary power consumption occurs during standby periods
Solution Approach 1:
The control unit dynamically switches between normal operation mode and standby mode based on whether control signals are being received. In normal mode, the control unit fully operates to enable remote control. In standby mode, the control unit enters low-power state while maintaining the ability to receive and respond to control signals, thus reducing energy loss during periods when remote control is not actively used.
2Reliability
If the control unit is kept in normal operation to maintain control capability, then the responsiveness to control signals is improved, but power consumption increases unnecessarily
Solution Approach 1:
The system periodically monitors for control signals and switches between normal and standby modes. During standby, the system enters low-power state but periodically wakes up to check for incoming control signals. When a control signal is detected, the system returns to normal operation mode, ensuring reliable responsiveness while minimizing power consumption during extended periods without control activity.
3Loss of energy
If the power source is switched off to eliminate standby power consumption, then energy savings are achieved, but the control unit cannot receive or respond to control signals
Solution Approach 1:
The power system is segmented into multiple operational states: normal operation mode with full power, standby mode with reduced power consumption, and complete power off state. The control unit can transition between these states independently, allowing the system to eliminate standby power consumption by switching to complete power off when not in use, while maintaining the ability to quickly return to normal operation when control signals are needed.
Data Source
AI summary
A lighting system with reduced standby power according to the embodiment includes a main control unit to control a lighting device; a driver to supply the control signal to the lighting device; and an AC-DC converting circuit to supply power to the driver. A method of reducing standby power according to the embodiment includes charging a standby power supply unit with power in a normal mode; checking whether a lighting off signal is transmitted and switching off a lighting, and simultaneously, shutting off the power supplied from the AC-DC converting circuit when the lighting off signal is transmitted; changing an operation mode of a lighting device from a normal mode to a standby mode; checking whether a voltage of the standby power supply unit is less than a predetermined level; and charging the standby power supply unit when the voltage is less than the predetermined level.