LED Module Power Line Amplitude Modulation Control
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Solution Overview
Problem
Existing methods for controlling LED light emission through power line transmission are either inconvenient due to requiring multiple wires, costly due to non-modular designs, or result in unstable light emission due to low signal levels.
Innovation Solution
A processing method and LED module utilizing a power line transmission amplitude-modulated signal, comprising a voltage processing module, voltage regulator module, control module, constant current module, signal comparison module, and an oscillator, which processes high and low-level amplitude-modulated signals to provide stable power and control signals for the LED, allowing for stable light emission and modular production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If independent transmission by signal line and power line is used, then control signal decoding is simple, but more wires are needed increasing material and labor costs
Solution Approach 1:
The patent combines power transmission and control signal transmission into a single power line by amplitude-modulating the control signal onto the power supply voltage. This merging eliminates the need for separate signal lines, reducing wire quantity while maintaining control functionality through demodulation at the receiving end.
Solution Approach 2:
The power line is given dual functionality: it serves both as a power supply conductor and as a control signal transmission medium. By modulating control signals onto the power voltage, the same physical infrastructure performs multiple functions, reducing material requirements without complicating the receiving end.
2Quantity of substance
If control signal and power supply are modulated together, then wire quantity is reduced, but filtration is needed at receiving end preventing LED encapsulation and modularization
Solution Approach 1:
The patent extracts the control signal from the modulated power line by demodulating it at the receiving end. This separation allows the LED module to be self-contained and modular, with the control signal recovery happening outside the LED encapsulation, enabling automatic production and modular assembly.
Solution Approach 2:
The system is divided into distinct functional modules: the LED module that receives modulated power, and the external control circuit that performs demodulation. This segmentation allows the LED to be encapsulated and manufactured independently while maintaining modularization benefits.
3Adaptability or versatility
If low level is provided by Zener diode, then signal modulation is achieved, but current is too small to drive LED resulting in unstable light emission
Solution Approach 1:
The patent changes the voltage level parameters by using the full power supply voltage swing (including higher voltage levels) rather than relying solely on low-voltage Zener diode regulation. This parameter change provides sufficient current drive capability while maintaining signal modulation through amplitude variation of the power line voltage.
Data Source
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AI summary
The present invention discloses a processing method and LED module based on a power line transmission amplitude-modulated signal, which comprises a voltage processing module, a voltage regulator module, a control module, a constant current module, a signal comparison module, an oscillator and an LED, wherein an amplitude-modulated signal having a high and low level is input from a positive electrode terminal and then processed by the voltage processing module for input to the voltage regulator module, a power supply voltage is provided respectively for the LED and the control module under the effect of the voltage regulator module, and a reference voltage is provided for the signal comparison module; at the same time, the amplitude-modulated signal is input to the signal comparison module, such that a control signal is obtained under the effect of the signal comparison module for input to the control module; and the control module outputs, under the effect of the control signal, a drive signal to adjust the current of the constant current module, so as to control the change of light emission of the LED, and one end of the control module is connected to the oscillator. In the present invention, by processing the high and low levels of the amplitude-modulated signal, the LED emits light stably, and can be automatically produced to save the processing cost.