Driverless LED Lighting Circuit for Stable AC Operation
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Solution Overview
Problem
Existing LED luminaires require a separate driving power supply, increasing manufacturing costs, energy consumption, and reducing lifespan due to additional structural components.
Innovation Solution
An LED lighting circuit that integrates an AC power supply, rectification module, current-limiting and voltage-reducing module, and LED illumination module, allowing direct connection to AC power without a driving power supply, using rectifier diodes and passive capacitive elements for stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an independent driving power supply is added to LED luminaires, then the LED can operate stably on DC power, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the driving power supply functions directly into the LED lighting circuit by integrating the rectification module and current-limiting module with the LED illumination module. This eliminates the need for an independent driving power supply while maintaining stable DC operation from AC input, thereby reducing device complexity and manufacturing cost.
Solution Approach 2:
The lighting circuit is designed to perform multiple functions: the rectification module converts AC to pulsating DC, the current-limiting module provides both current regulation and voltage reduction, and the LED module provides illumination. This multi-functional integration eliminates the need for separate driving power supply components.
2Reliability
If an independent driving power supply is added to LED luminaires, then the LED can operate stably on DC power, but the manufacturing cost increases
Solution Approach 1:
The patent combines the driving power supply circuitry with the LED lighting circuit, eliminating the need for separate independent driving power supply components. This integration reduces the total component count and manufacturing cost while maintaining stable DC operation for the LEDs.
Solution Approach 2:
The lighting circuit is designed to be self-sufficient by integrating all necessary power conversion and regulation functions within the same circuit. The rectification module and current-limiting module work together to provide stable DC operation without requiring external independent driving power supply units, thereby reducing manufacturing cost.
3Reliability
If an independent driving power supply is added to LED luminaires, then the LED can operate stably on DC power, but the energy consumption increases
Solution Approach 1:
The patent integrates the power conversion functions directly into the LED lighting circuit, eliminating the energy losses associated with separate independent driving power supply units. The rectification module and current-limiting module are designed to work efficiently together, reducing redundant energy consumption while maintaining stable DC operation.
4Reliability
If an independent driving power supply is added to LED luminaires, then the LED can operate stably on DC power, but the lifespan decreases due to additional structural components
Solution Approach 1:
The patent merges the driving power supply functions into the LED lighting circuit, eliminating the need for independent driving power supply units that would add structural complexity and potential failure points. This integration reduces the number of components that could fail, thereby extending the overall lifespan of the luminaire while maintaining stable DC operation.
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
Enables stable operation on AC power, reduces manufacturing costs and energy consumption, and simplifies the circuit by eliminating the need for external components like constant current sources and transformers.
Implementation Method 1
a rectification module; wherein an input terminal of the AC power supply is connected to the rectification module for converting an AC power into a pulsating DC voltage
Implementation Method 2
the current-limiting and voltage-reducing module includes at least one limiting unit, with one end connected to an output terminal of the rectification module and the other end connected to the LED illumination module
Data Source
AI summary
The present invention relates to a LED lighting circuit without a driving power supply, including a rectification module, a current-limiting and voltage-reducing module, and an LED illumination module. The AC power supply is connected to the rectification module; the current-limiting and voltage-reducing module is connected to the rectification module; and the LED illumination module includes multiple LED beads. The invention aims to reduce operational energy consumption of LED light strings.