Integrated LED Driver Circuit for Power Efficiency
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Solution Overview
Problem
Conventional LED lighting apparatuses have reduced power efficiency due to complex constructions and high power consumption by driving circuits, especially when including peripheral modules like sensor boards and communication modules.
Innovation Solution
An LED lighting apparatus with a current regulator that transforms rectified voltage using a switching operation and generates driving pulses with varied pulse width, incorporating a feedback circuit and dimming control to efficiently supply power to LEDs and peripheral modules, such as sensor boards and communication modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an SMPS module and driving circuit are used to supply power to LEDs, then the LED lighting apparatus can operate, but the construction becomes complicated and total power efficiency is reduced to about 81%
Solution Approach 1:
The patent merges the power supply function and LED driving function into a single integrated circuit that processes AC input directly. This eliminates the need for separate SMPS module and driving circuit, thereby simplifying the construction while maintaining operational capability.
Solution Approach 2:
The integrated circuit performs multiple functions simultaneously: it acts as both a power supply converter and an LED driver. By incorporating rectification, voltage regulation, and current control functions within one device, it achieves multi-functionality that resolves the contradiction between operational reliability and construction simplicity.
2Reliability
If an SMPS module and driving circuit are used to supply power to LEDs, then the LED lighting apparatus can operate, but total power efficiency is reduced to about 81%
Solution Approach 1:
By combining the power conversion and LED driving functions into a single integrated circuit, the patent eliminates the energy losses associated with multiple separate conversion stages. The unified design achieves higher overall power efficiency by avoiding the cumulative efficiency degradation of cascaded SMPS and driving circuit stages.
3Adaptability or versatility
If peripheral circuit modules such as sensor board are added to the LED lighting apparatus, then the functionality is enhanced, but power efficiency is reduced because most power is consumed by the driving circuit
Solution Approach 1:
The integrated circuit provides universal power supply capability that can simultaneously support LED operation and peripheral circuit modules. By delivering regulated output suitable for both high-power LEDs and low-power peripheral devices from the same circuit, it enables enhanced functionality while maintaining high power efficiency for all connected 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 solution achieves high power efficiency by simplifying the structure and reducing power consumption, maintaining constant brightness and enabling efficient control of LED lighting systems, including multiple spaced-apart installations like security lights or streetlamps.
Implementation Method 1
a converter for transforming rectified voltage in accordance with a switching operation according to a driving pulse and outputting the transformed voltage
Data Source
AI summary
The present invention discloses an LED lighting apparatus. The LED lighting apparatus includes a converter for transforming rectified voltage in accordance with a switching operation according to a driving pulse and outputting the transformed voltage, a current regulator for generating the driving pulse having a pulse width varied in response to a control signal and the amount of current of the converter and switching the operation of the converter using the generated driving pulse, and a peripheral circuit module for providing the control signal for controlling the dimming of an LED lighting.