LED Lamp Encoding Device for Single-Wire Power and Control
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Solution Overview
Problem
Conventional LED lamp control systems require complex networks of twisted-pair lines for power and control signals, making installation difficult and increasing wiring complexity, especially in large lighting systems.
Innovation Solution
An encoding device that receives AC voltage, rectifies it, and generates an encoded signal with a waveform corresponding to display data, allowing a single transmission line to convey both power and control signals, simplifying the configuration and reducing the number of wires needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two twisted-pair lines are used to supply power and control signals to LED lamps, then reliable power and control signal transmission is achieved, but wiring complexity and installation difficulty increase significantly
Solution Approach 1:
The patent combines power transmission and control signal transmission into a single transmission line by encoding control signals onto the power line. The encoding device modulates control signals onto the power supply line, allowing both power and control data to be transmitted through one wire, thereby reducing wiring complexity while maintaining reliable operation
Solution Approach 2:
The transmission line is designed to perform multiple functions simultaneously: it carries both power supply current and encoded control signals. The single transmission line serves dual purposes as both a power conductor and a communication channel, eliminating the need for separate control wiring
2Device complexity
If a single transmission line is used to control LED lamps, then wiring complexity is reduced, but the ability to transmit both power and control signals simultaneously becomes challenging
Solution Approach 1:
The patent uses periodic modulation of the power line to encode control signals. The encoding device varies the power line characteristics (such as voltage or current) in a periodic manner to represent control data, allowing the single transmission line to carry both power and control information through time-division multiplexing
Solution Approach 2:
The invention changes the parameters of the power line (voltage, current, or frequency) to encode control signals. By modulating these electrical parameters, the system can transmit multiple types of information through a single line without interference, maintaining both simplicity and versatility
3Reliability
If conventional control systems are used with separate power and control lines, then clear signal separation is achieved, but installation time and labor requirements increase
Solution Approach 1:
The patent merges power and control signal transmission into a single line, directly reducing the number of wires that need to be installed. This eliminates the time-consuming task of laying separate control wiring throughout the lighting system while maintaining clear signal separation through encoding techniques
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 illumination control with reduced wiring complexity, shortening installation time and simplifying the configuration of LED lamp systems by using a single transmission line for both power and control signals.
Implementation Method 1
a rectifier (11), and an encoder (14). The rectifier (11) rectifies the AC voltage input (5) to result in a rectified signal
Data Source
AI summary
A controlled lighting system includes an encoding device and a lamp. The encoding device includes a rectifier for rectifying an AC voltage input to result in a rectified signal, and an encoder for generating an encoded signal from the rectified signal and display data. The encoded signal has consecutive signal regions with a waveform of a positive half-cycle of an AC sinusoidal wave or a low potential. The lamp includes a LED unit and a decoding device. The decoding device includes a direct current converter for extracting a direct current voltage from the encoded signal, a detecting circuit for extracting a wave signal from the encoded signal, a processor for generating decoded data related to a light-emitting operation according to the wave signal, and a driver for driving the LED unit according to the direct current voltage from the direct current converter and the decoded data from the processor.