LED Lighting Apparatus Voltage Regulation Circuit
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Solution Overview
Problem
Conventional LED lighting apparatuses have complex configurations that reduce overall power efficiency, and struggle to maintain stable dimming control due to insufficient driving voltage during low light output states.
Innovation Solution
A lighting apparatus with a power conversion circuit using a transformer to convert rectified voltage into a driving voltage, a dimming control circuit that operates using this voltage, and a driving control circuit that monitors and maintains the driving voltage at a predetermined level for stable dimming control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an SMPS module and driving circuit are used to supply power to LED lamps, then the LED lighting apparatus can function properly, but the configuration becomes complex and power efficiency decreases
Solution Approach 1:
The patent extracts and eliminates the SMPS module from the power supply system, replacing it with a simplified circuit that directly processes AC power. This removes the complex dual-stage power conversion architecture while maintaining the essential power supply function to LED lamps and peripheral circuits.
Solution Approach 2:
The patent merges the power supply function and dimming control function into a single integrated circuit architecture. The rectified voltage is directly used for both powering the LED lamps and providing operating voltage to the dimming control processor, eliminating the need for separate power conversion stages.
2Reliability
If an SMPS module and driving circuit are used to supply power to LED lamps, then the LED lighting apparatus can function properly, but overall power efficiency is reduced
Solution Approach 1:
The patent removes the SMPS module which has inherent power losses, and replaces it with a direct rectification approach. This eliminates the efficiency penalties associated with dual-stage power conversion, allowing the system to achieve higher overall power efficiency while maintaining reliable power supply.
Solution Approach 2:
The rectified voltage serves multiple functions simultaneously: it powers the LED lamps through the driving circuit, provides operating voltage to the dimming control processor, and supplies power to peripheral circuit modules. This multi-functional use of a single power source reduces energy loss by eliminating redundant power conversion stages.
3Ease of operation
If dimming control is performed through constant current control method, then the LED lighting apparatus can control light output, but the driving voltage may not maintain the required level for dimming control processor during low light output states
Solution Approach 1:
The rectified voltage is designed to serve dual purposes: powering the LED lamps and providing stable operating voltage to the dimming control processor. This ensures that even during dimming operations when lamp power requirements decrease, the processor continues to receive sufficient voltage for reliable operation.
Solution Approach 2:
The patent changes the voltage level parameter by using a voltage divider circuit or regulator to provide a stable, elevated operating voltage to the dimming control processor from the rectified voltage. This parameter adjustment ensures the processor receives adequate voltage even when the overall system operates at reduced power levels during dimming.
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
This configuration improves power efficiency, simplifies the structure, and ensures stable dimming control by maintaining the driving voltage at a level sufficient for the dimming control processor, even during low light output states.
Implementation Method 1
a power conversion circuit configured to convert a rectified voltage into a driving voltage using a transformer
Data Source
AI summary
The present invention relates to a lighting apparatus which stably performs dimming control on a lamp implemented with light emitting diodes (LEDs) or the like. The lighting apparatus may improve power efficiency by driving power supplied to a lamp in a current regulation method, perform constant current control such that the lamp maintains constant brightness, perform dimming control for controlling the brightness of the lamp, commonly supply the power provided to the lamp to peripheral circuit modules, and perform constant voltage control such that a driving voltage supplied as power is maintained at a predetermined level or more.