Auxiliary Driver for Low-Power LED Lighting Efficiency
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Solution Overview
Problem
Existing LED lighting systems face challenges in achieving low standby power consumption and high efficiency, especially at low load conditions, due to the need for separate auxiliary power supplies and the inefficiency of main LED drivers at low power levels.
Innovation Solution
The implementation of a driver arrangement that utilizes an auxiliary driver to power the LED lighting load at low power demands, instead of the main LED driver, thereby reducing the operational efficiency issues at low loads and meeting low standby power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a standalone auxiliary power supply is used to meet low standby power requirements, then standby power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent merges the auxiliary power supply function into the main LED driver by enabling the auxiliary driver to also power the LED lighting load. This integration eliminates the need for a completely separate auxiliary power supply while maintaining low standby power consumption, as the auxiliary driver can handle both auxiliary modules and LED lighting at low power levels.
Solution Approach 2:
The auxiliary driver is designed with multi-functionality to serve dual purposes: powering auxiliary modules (sensors, communications) and powering the LED lighting load. This universal approach allows a single driver to perform multiple functions, reducing overall system complexity while meeting standby power requirements.
2Power
If the main LED driver is designed for maximum power requirements, then it can meet peak power demands, but efficiency at low load conditions deteriorates
Solution Approach 1:
The patent segments the power delivery function by introducing an auxiliary driver that handles low power demands separately from the main LED driver. The auxiliary driver is optimized for low power operation with components sized appropriately for lower current ratings, while the main driver handles peak power requirements. This segmentation allows each driver to operate in its high-efficiency region.
Solution Approach 2:
The system dynamically switches between the auxiliary driver and main LED driver based on power demand conditions. When power demand is low, the auxiliary driver is activated; when demand exceeds the auxiliary driver's capacity, the main LED driver takes over. This dynamic allocation ensures optimal efficiency across the full range of power demands.
Data Source
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AI summary
A driver arrangement is provided for a LED lighting device with a LED light source and at least one additional auxiliary module. The driver arrangement comprises separate main and auxiliary drivers. The delivery of power from the auxiliary driver is controlled to either an auxiliary power output or to both a main power output and the auxiliary power output. Each driver can be optimized for the load it is required to drive. The device may overall be more efficient in a low power auxiliary mode, by using a driver suited for such low power operation. In particular when the power demand of the LED light source is low, the auxiliary driver may be used.