LED Lighting Apparatus with Constant Current Switch Module
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Solution Overview
Problem
LED light devices require stable DC power to function effectively, but most indoor power sources are AC, leading to potential damage and reduced lifespan if the current is not properly stabilized.
Innovation Solution
A lighting apparatus comprising a rectifier, a loading module, a constant current switch module, and a current supplemental module, which convert AC power to a stable driving current for LED modules by controlling the working cycle and supplying supplemental current during insufficient positive wave signals, ensuring constant power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If AC power is directly supplied to LED modules, then the power supply structure is simple, but the LED modules are damaged and lifespan is reduced due to unstable current
Solution Approach 1:
The power supply system is divided into multiple independent modules: rectifier module, loading module with multiple loading units, constant current switch module, and current supplemental module. Each module performs a specific function in the power conversion process, allowing for targeted optimization and protection of the LED modules.
Solution Approach 2:
The rectifier converts AC power to positive wave signals before they reach the LED modules, and the current supplemental module pre-charges capacitors during specific phases to ensure continuous stable current supply. These preliminary actions prevent current instability before it can damage the LED modules.
2Device complexity
If a simple rectifier is used to convert AC to DC, then the device complexity is low, but the current is unstable and insufficient during certain phases
Solution Approach 1:
The constant current switch module controls the working cycles of multiple loading units in a periodic manner, switching them on and off at specific intervals. The current supplemental module charges capacitors during specific phases (when positive wave signals are insufficient) and releases stored energy when needed, creating a periodic compensation action that stabilizes the current throughout the entire AC cycle.
Solution Approach 2:
The system dynamically changes the working parameters of different modules based on the phase of the AC power signal. The loading units are activated at different times, and the current supplemental module adjusts its charging/discharging parameters according to the positive wave signal intensity, optimizing current stability across varying power conditions.
3Reliability
If multiple loading units are used to stabilize current, then the current stability is improved, but the device complexity increases
Solution Approach 1:
Multiple loading units are combined within a single loading module, sharing common control circuitry and power distribution pathways. The constant current switch module controls all loading units through a unified control mechanism, and the current supplemental module serves all units through shared capacitor banks, reducing overall system complexity despite having multiple loading units.
Solution Approach 2:
The loading units are designed with universal functionality, where each unit can operate independently or in combination with others. The control module and current supplemental module serve multiple functions: they manage multiple loading units simultaneously, provide constant current regulation, and offer current supplementation during insufficient phases, reducing the need for separate dedicated components for each function.
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 provides a stable and efficient power supply to LED modules, preventing damage and ensuring consistent light output, thereby enhancing the quality and longevity of LED light devices.
Implementation Method 1
The rectifier is connected to an output of the AC power for receiving an AC signal to convert the AC signal to a positive wave signal
Implementation Method 2
The current supplemental module is charged the loading unit during the working cycle and supplies output current to the loading module when the positive wave signal is in sufficient to drive the loading module
Data Source
AI summary
A lighting apparatus includes a rectifier, a loading module, a constant current switch module and a current supplemental module. The rectifier is connected to an output of the AC power for receiving an AC signal to convert the AC signal to a positive wave signal. The loading module includes multiple loading units. The loading module is disposed on the output of the rectifier. The constant current switch module is connected to output of each loading unit and to control the working cycle of each loading unit so as to ensure a total passing current of the loading module is opposite in phase to the positive wave signal to keep output power constant. The current supplemental module supplies output current to the loading module when the positive wave signal is in sufficient to drive the loading module.