LED Control System Using Modulated Signals on Single Transmission Line
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Solution Overview
Problem
Existing light emitting diode (LED) lamp string modules face issues with control signal transmission, leading to incomplete lighting when one module is abnormal, and require numerous power and signal transmission lines, increasing complexity and cost, especially in parallel connections.
Innovation Solution
A light emitting diode control system using modulated signals, which includes a power conversion circuit, control circuit, and LED emission circuit, where a microcontroller modulates data signals to be transmitted alongside direct current power over a single transmission line, allowing for efficient control of LED colors and intensities across multiple modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting diode lamp string modules are connected in series, then the connection is simple and easy, but when one module is abnormal, the control signal cannot be sent to the remaining modules, causing them to remain unlit
Solution Approach 1:
The patent divides the series-connected LED modules into independently controllable segments. Each module has its own control signal input terminal, allowing individual control even when connected in series. This segmentation enables the system to maintain reliability by isolating control signals to specific modules, preventing a single abnormal module from blocking control to other modules.
2Reliability
If light emitting diode lamp string modules are connected in parallel, then each module can be controlled independently, but the amount of control lines and address lines increases proportionally, increasing complexity and cost
Solution Approach 1:
The patent merges the control signal transmission function with the power transmission function by using a single transmission line that carries both power and modulated control signals. The control circuit modulates control signals onto the power transmission line, allowing both power and control data to travel through the same physical medium, thereby reducing the total number of lines required while maintaining independent control capability.
Solution Approach 2:
The transmission line is designed to serve multiple functions: it simultaneously transmits power to the LED modules and carries modulated control signals for addressing and control. This multi-functionality eliminates the need for separate dedicated control lines for each module, significantly reducing system complexity while preserving the ability to control each module independently.
3Adaptability or versatility
If many power transmission lines and signal transmission lines are used to control colors and intensities, then control capability is achieved, but cost down can be achieved only if the amount of lines is reduced
Solution Approach 1:
The patent implements a universal transmission line that performs multiple functions: power delivery, control signal transmission, and data communication. By modulating control signals onto the power line, the system achieves comprehensive control over LED colors and intensities using a single line per module, dramatically reducing the quantity of transmission lines needed while maintaining full control capability.
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 enables efficient control of multiple LED modules with reduced power and signal transmission lines, maintaining functionality even if one module is abnormal, while minimizing equipment complexity and cost.
Implementation Method 1
a power conversion circuit (8), a control circuit (10), and a light emitting diode emission circuit (140) The power conversion circuit (8) is configured to convert an alternating current power into a direct current power
Implementation Method 2
The control circuit (10) is configured to modulate the data signal to a modulated signal
Implementation Method 3
The light emitting diode emission circuit (140) is adapted to receive the direct current power and the modulated signal outputted from the control circuit to vary the colors and intensities of the light emitting diodes
Data Source
AI summary
A light emitting diode control system includes a power conversion circuit, a control circuit, and a light emitting diode emission circuit. The control circuit is configured to modulate a data signal to a modulated signal. The light emitting diode emission circuit is electrically connected in series to the control circuit through a transmission line. The light emitting diode emission circuit is adapted to receive the modulated signal outputted from the control circuit. Moreover, the light emitting diode emission circuit includes an addressing unit. The type of the addressing unit could be a pin-selection type or a burning-code type.