Dimmable Lamp Switch Control Device with Isolation Circuit
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Solution Overview
Problem
Traditional LED lamps face challenges in adapting to new product access standards, specifically in providing a dimming function while ensuring anti-electric shock protection, particularly in wire dimming systems where the dimming signal must be supplied through AC input to the lamp's internal control circuit without causing electrical leakage.
Innovation Solution
A dimmable lamp switch control device comprising conductive pin sets, a rectifier bridge module, a dimming signal identification and control circuit module, a filter circuit module, a power supply circuit module, a buck-boost constant current module, and an anti-electricity shock detection control circuit module, which together manage the AC input, filter, and control the dimming signal to prevent electrical shock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wire dimming program is used to supply dimming signal through AC input, then dimming function is achieved, but electrical leakage risk increases
Solution Approach 1:
The patent introduces an intermediary isolation circuit between the AC input and the control circuit. This isolation circuit acts as a mediator that transfers the dimming signal from the AC line to the control circuit while blocking the harmful electrical leakage current. The isolation transformer or optocoupler in the circuit provides galvanic isolation, allowing signal passage while preventing direct electrical connection that would cause leakage.
Solution Approach 2:
The patent divides the circuit into separate isolated sections: the AC input section, the isolation section, and the control circuit section. By segmenting the circuit and introducing isolation barriers between segments, the dimming signal can be transmitted across segments while preventing harmful currents from propagating through the entire system. This segmentation resolves the contradiction by allowing signal transmission while blocking leakage.
2Reliability
If traditional wireless dimming or power carrier program is used, then anti-electric shock protection is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the AC input line serve multiple functions: it provides both power supply and dimming signal transmission simultaneously. By using the existing AC line for dual purposes rather than adding separate wireless or power carrier circuits, the patent achieves reliable dimming control while maintaining simple circuitry and avoiding the complexity of additional communication interfaces.
Solution Approach 2:
The patent enables the AC input line to serve itself by extracting the dimming signal directly from the power line. The control circuit detects and processes the dimming information embedded in the AC signal without requiring external communication infrastructure. This self-service approach eliminates the need for complex wireless modules or dedicated signal transmission circuits, reducing overall system complexity while maintaining safety.
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
The solution enables efficient dimming control and anti-electric shock protection, making the device easier and less costly to implement compared to traditional wireless or thyristor dimming schemes, with operation similar to existing usage, ensuring reliable and safe dimming functionality.
Implementation Method 1
a rectifier bridge module, which connects the conductive pin sets to input at least one voltage signal
Implementation Method 2
a filter circuit module, which connects the rectifier bridge module for outputting a smooth DC voltage
Implementation Method 3
a buck-boost constant current module connected to the filter circuit module and stepping down or boosting the filtered DC voltage
Data Source
AI summary
The invention is a dimmable lamp switch control device, including: a rectifier bridge module is connected to the conductive pin sets and can enter at least one voltage signal. A filter circuit module has a circuit guard unit connects to a backflow prevention steady voltage filter circuit module, which can play a role in surge voltage absorption and prevent damage from excessive surge voltage connected to the output of a backflow prevention steady voltage filter circuit module. A PWM dimming control unit of a buck-boost constant current module is connected to the dimming signal identification and control circuit module for dimming control. An anti-electricity shock detection control circuit module based on the output signal of the rectifier bridge module to reduce the PWM signal of the buck-boost constant current module to avoid a greater electric shock currents.