LED Control System Using Modulated Signal on Single Line
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Solution Overview
Problem
Existing LED lamp string module control systems require numerous power and signal transmission lines, leading to increased complexity and costs, especially when dealing with abnormal modules, as they often necessitate proportional increases in control lines and address lines, regardless of connection type (serial or parallel).
Innovation Solution
An LED control system utilizing a modulated signal that stores computer control data in a data storage unit, converts AC power to DC power, and modulates the data signal for efficient transmission, allowing the same transmission line to carry both power and signal to control the color and intensity of LEDs, reducing the need for multiple lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If parallel-type connection is used to control LED lamp string modules, then reliability is improved (remaining modules can still be controlled when one is abnormal), but device complexity increases (control lines and address lines increase proportionally)
Solution Approach 1:
The patent combines power transmission and signal transmission into a single transmission line. The controller transmits both power and modulated signal data through the same line, eliminating the need for separate control lines and address lines. This merging approach maintains the ability to control multiple LED modules while dramatically reducing the number of required transmission lines.
Solution Approach 2:
The transmission line is designed to serve multiple functions simultaneously: it provides power transmission to LED modules and carries modulated signal data for control. This multi-functional approach allows a single line to replace what would traditionally require multiple dedicated lines, reducing overall system complexity while maintaining control capability.
2Device complexity
If serial-type connection is used to connect LED lamp string modules, then device complexity is reduced (easier connection), but reliability deteriorates (remaining modules cannot be controlled when one is abnormal)
Solution Approach 1:
The patent implements a feedback mechanism where each LED module detects the modulated signal transmitted through the transmission line and sends acknowledgment or status information back to the controller. This feedback capability allows the controller to identify and bypass abnormal modules, ensuring that control can continue for remaining modules even when one fails, thus improving reliability while maintaining simple serial connection structure.
3Manufacturing precision
If multiple transmission lines are used to control LED modules, then control precision is improved (color and intensity control), but device complexity increases (more power and signal lines)
Solution Approach 1:
The patent employs dynamic modulation techniques where the controller varies the characteristics of the modulated signal (frequency, amplitude, or pulse width) to precisely control LED color and intensity. This dynamic signal modulation allows for fine-grained control of LED parameters through a single transmission line, eliminating the need for multiple dedicated control lines while maintaining precise manufacturing control.
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 approach significantly reduces the number of transmission lines required, lowering equipment complexity and costs while maintaining control over LED modules, even if one module becomes abnormal, by using a single transmission line for both power and modulated signal.
Implementation Method 1
The power conversion circuit is provided to convert an AC power into a DC power
Implementation Method 2
The control circuit is electrically connected to the power conversion circuit to receive the DC power outputted from the power conversion circuit and the data signal outputted from the data storage unit, and to modulate the data signal to a modulated signal
Implementation Method 3
The LED emission circuits are electrically connected in series to the control circuit through a transmission line to receive the DC power outputted from the control circuit and the modulated signal to vary the color and intensity of the LEDs
Data Source
AI summary
An LED control system using a modulated signal includes a computer, a data storage unit, an AC power, a power conversion circuit, a control circuit, and an LED lamp string. The AC power is converted into a DC power by the power conversion circuit to supply a DC voltage to the control circuit and the LED lamp string. A computer control data is sent to the control circuit through the data storage unit by a user using the computer. The computer control data is modulated to a modulated signal by the control circuit. The modulated signal is sent to the LED lamp string with the same transmission line sending the DC voltage. The light of the LED lamp string is changed according to the modulated signal. The cost is reduced because the DC voltage and the modulated signal are sent in the same transmission line.