LED Control Circuit Power Line Signal Extraction
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Solution Overview
Problem
Traditional LED lighting control methods rely on separate control pins, wires, or master-slave modes, which can be unreliable, especially under high power conditions, and may interfere with other LED systems due to signal propagation through electrical systems.
Innovation Solution
An LED lighting system that connects to a variable power source, featuring power analyzing and processing circuitry to identify characteristics such as amplitude, frequency, and pulse width, and adjusts current control accordingly to control LED arrays, allowing for independent control without direct voltage application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If signal carrier is injected into input power to control LEDs, then control functionality is achieved, but signal propagation affects other LED lighting systems and reliability decreases under high power conditions
Solution Approach 1:
The patent extracts the control signal from the power input line by using a separate control pin that accepts control signals independently from the power supply. This separation removes the harmful signal propagation through the electrical system while maintaining control functionality, directly resolving the contradiction between ease of operation and reliability.
2Reliability
If separate control pin or wire is used to control LED lights, then control reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the control pin functionality with the existing LED module structure, integrating the control interface directly into the LED assembly. This combination maintains control reliability through separate signaling while reducing overall system complexity by eliminating the need for additional external control circuits and wiring harnesses.
3Ease of operation
If power source voltage is applied directly to LEDs in master-slave mode, then control simplicity is achieved, but control precision and flexibility are reduced
Solution Approach 1:
The patent segments the control function from the power delivery function by implementing a dedicated control pin that receives separate control signals. This segmentation allows independent optimization of both power management and control capabilities, enabling precise brightness and color management while maintaining simple power connection, thus resolving the contradiction between control simplicity and adaptability.
Data Source
AI summary
An LED control system is provided for connection to an LED lighting system via a power line to control the LED lighting system using commands formed by manipulation of frequency and amplitude of a signal transmitted over the power line. The signal may be for example a wave or a sequence of pulses. The signal may be provided in superposition with line power or the line power may be formed as the signal. The signal can be provided intermittently and a carrier wave also provided and modulated at the same time as the signal. When the signal is not being produced, the power on the power line may be power that is allowed to flow without manipulation from an external portion of the power line.