LED Control Circuit Rectified Voltage Power Efficiency
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Solution Overview
Problem
LED lighting apparatuses face inefficiencies in power consumption due to the need for additional devices that require a constant operating voltage, which degrades power efficiency when using external or separately generated voltages.
Innovation Solution
A control circuit that utilizes a rectified voltage for light emission to provide an operating voltage to additional devices, incorporating a driver and current sources to manage the current path and voltage levels, ensuring efficient power usage by regulating primary and secondary currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external voltage or separately generated voltage is used to power additional devices, then the additional devices can operate, but power efficiency is degraded
Solution Approach 1:
The patent combines the power supply function for additional devices with the existing rectified voltage used for LED operation. The control circuit integrates current management functions to simultaneously power both the LED and additional devices from the same rectified voltage source, eliminating the need for separate power supply circuits and improving overall power efficiency
Solution Approach 2:
The control circuit is designed to perform multiple functions: it manages the current path for LED light emission, generates operating voltage for additional devices, and regulates both primary and secondary currents. This multi-functional approach eliminates the need for separate dedicated power supply circuits for additional devices
2Adaptability or versatility
If additional devices are added to control light emission, then lighting control functionality is improved, but power consumption increases
Solution Approach 1:
The control circuit uses the rectified voltage itself to generate the operating voltage for additional devices through integrated current management. The system serves itself by utilizing the existing power conversion process to simultaneously power both the LED and control functions, rather than requiring external power supplies
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 solution improves power efficiency and reduces power consumption by stabilizing the operating voltage using rectified voltage-based current management, ensuring efficient light emission and device operation.
Implementation Method 1
drive a current using the rectified voltage such that the LED emits light
Implementation Method 2
convert an AC voltage into a rectified voltage, and drive a current using the rectified voltage
Data Source
AI summary
Disclosed is a control circuit of an LED lighting apparatus which is capable of improving power efficiency. The control circuit controls light emission of one or more LED groups in response to changes of a rectified voltage, and includes a current source configured to provide a primary current using a driving current outputted through a current path of a driver and a secondary current using a rectified current provided to a plurality of LED groups. Thus, the control circuit can perform a charging operation using a current provided from the current source, and provide a charge voltage to an additional device.