Isolation Transformer LED Dimming Circuit for Legacy Wiring
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Solution Overview
Problem
Transitioning from traditional lighting systems to LED-based systems poses challenges due to the need for modifying existing infrastructure, including wiring and electrical layouts, which can be labor-intensive and costly, deterring users from adopting LED technology.
Innovation Solution
A lighting apparatus with an isolation transformer, output rectification and voltage regulation circuit, output current limiting and filtering circuit, and signal detection and generation circuit, allowing compatibility with traditional dimmers and existing wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional lighting systems are replaced with LED-based systems, then energy efficiency and lifespan are improved, but installation complexity and cost increase due to infrastructure modifications
Solution Approach 1:
The patent introduces an intermediary device that interfaces between traditional dimmer switches and LED lighting systems. This intermediary circuit board converts the control signals from traditional dimmers into appropriate control signals for LED drivers, enabling compatibility without requiring changes to existing wall switches or wiring infrastructure. The intermediary acts as a bridge that allows LED systems to work with legacy control devices.
Solution Approach 2:
The patent segments the lighting control system into separate functional modules: the existing dimmer switch, the intermediary conversion circuit, the LED driver, and the LED light source. This segmentation allows each component to be optimized independently and enables gradual implementation where the intermediary device can be installed without replacing entire lighting systems or electrical infrastructure.
2Ease of operation
If traditional dimmers are used with LED lighting, then ease of operation is improved, but compatibility and control precision deteriorate
Solution Approach 1:
The patent employs parameter changes by detecting the type of dimmer switch connected (leading-edge or trailing-edge) and dynamically adjusting the control parameters of the LED driver accordingly. The system measures electrical characteristics of the connected dimmer and modifies its operating parameters to ensure optimal compatibility and control precision for each dimmer type.
Solution Approach 2:
The patent implements dynamic adaptation where the control system continuously monitors the connected dimmer's characteristics and adjusts its behavior in real-time. The intermediary circuit dynamically modifies signal waveforms, timing, and amplitude based on the detected dimmer type and loading conditions, ensuring optimal performance across different operational scenarios.
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 flexible control of LED lighting using traditional dimmers and switches, minimizing installation complexity and costs, thereby promoting the adoption of LED technology while preserving user convenience.
Implementation Method 1
an isolation transformer (110), an output rectification and voltage stabilization circuit (120) connected to a secondary coil (S) of the isolation transformer (110)
Implementation Method 2
an output rectification and voltage stabilization circuit (120) connected to a secondary coil (S) of the isolation transformer (110), wherein the output rectification and voltage stabilization circuit (120) rectifies and stabilizes a voltage signal output by the isolation transformer (110)
Data Source
AI summary
A lighting apparatus includes an isolation transformer, an output rectification and voltage regulation circuit, an output current limiting and filtering circuit, and a signal detection and generation circuit. The homonymous terminal of the primary side opposes the homonymous terminal of the secondary side. The output rectification and voltage regulation circuit is connected to the secondary coil of the isolation transformer. The output rectification and voltage regulation circuit rectifies and stabilizes the voltage signal output by the isolation transformer. The output current limiting and filtering circuit is connected to the dimmer and the output rectification and voltage regulation circuit. The output current limiting and filtering circuit adjusts the output current and output voltage according to the operation of the dimmer, and the output current limiting and filtering circuit limits and filters the signal output by the output rectification and voltage regulation circuit.