Addressable RGB Lamp Control via PWM Signal Segmentation
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Solution Overview
Problem
Traditional RGB four-wire PWM lamp systems lack the ability to control lamps separately and face challenges in system expansion due to direct connections and PWM signal modulation, which restricts individual lamp control and scalability.
Innovation Solution
A control method that upgrades the software in the lighting control module to generate separate PWM signals for power supply and lamp control, using addressable lamps with decoding modules to regulate colored light output, allowing for separate control of lamps and constant power supply without altering the original hardware or line structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If direct connection between controller output signal line and lamp colour lines is used, then colour control of lamps is realized, but separate control of lamps is not possible
Solution Approach 1:
The patent segments the control system by introducing addressable lamps with unique identifiers and a decoding module that distributes control signals to specific lamps. Each lamp can be individually addressed through the same RGB lines, enabling separate control while maintaining the original direct connection architecture.
2Loss of information
If PWM signals are transmitted on RGB lines, then variable colour information is transmitted, but constant power supply cannot be provided
Solution Approach 1:
The patent separates the PWM control signal function from the power supply function. The original RGB lines continue to transmit PWM colour information, while a dedicated separate line provides stable power supply voltage to addressable lamps, ensuring both functions operate independently without interference.
Solution Approach 2:
The patent introduces an intermediary power supply line that mediates between the controller and lamps. This separate power line provides stable voltage reference for the addressable lamps while the original PWM lines maintain their colour control function, preventing power supply instability caused by PWM modulation.
3Device complexity
If traditional RGB four-wire wiring structure is used, then system is simple, but system expansion is difficult
Solution Approach 1:
The patent makes the original RGB four-wire system universal by introducing addressable lamps that can be controlled individually through the same lines. The system maintains compatibility with traditional wiring while gaining the ability to support multiple independently controllable lamps, enabling easy system expansion without changing the basic wiring structure.
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
Enables separate control of lamps, constant power supply, and system expansion, improving the lighting effect and transmission efficiency by allowing new addressable lamps to be added to the system, while maintaining compatibility with existing hardware.
Implementation Method 1
the lighting control module outputting a first PWM signal through the connecting line A and outputting a second PWM signal through the connecting line B; wherein, the first PWM signal is used for controlling an on/off time interval of the first switch device on the connecting line A to generate a continuous variable level at two terminals of the first load resistor
Implementation Method 2
after the control information is decoded by the respective decoding modules, currents transmitted to the coloured light emitting modules being regulated to control the coloured light emitting modules
Data Source
AI summary
A control method for a lamp system based on RGB wiring arrangement includes outputting a first PWM signal through a connecting line and a second PWM signal through another connecting line; wherein, the first PWM signal is used for controlling an on/off time interval of a first switch device on the connecting line to generate a continuous variable level at two terminals of the resistor on the connecting line, the continuous variable level forms a digital signal, and the second PWM signal is used for controlling the second switch device on the another connecting line to be normally-off to provide a stable power supply; the lamps acquiring corresponding control information from the digital signal through ID matching; and after the control information is decoded by the decoding module, currents transmitted to the coloured light emitting modules being regulated to control the coloured light emitting modules.