Two-Wired LED Dimming via Phase Modulation
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Solution Overview
Problem
The transition from conventional light bulbs to LED lamps requires minimal adjustments to the existing system and wiring structure, as users need to adapt to new light adjustment behaviors, and existing solutions do not effectively facilitate seamless transitions.
Innovation Solution
A two-wired LED light adjusting system comprising a phase modulating circuit, an LED driving circuit, a rectifying circuit, and a controller, which generates phase modulating voltage with a non-conduction angle to control the LED lamp module's luminance, allowing for efficient light adjustments by digitizing analog inputs and utilizing binary codes to represent different waveforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional light bulbs are replaced by LED lamps, then energy efficiency and heat dissipation are improved, but user behavior and infrastructure require significant changes
Solution Approach 1:
The LED light adjusting system is designed to work with existing two-wire AC power infrastructure while providing multiple functions including dimming, color temperature adjustment, and scene control. The system maintains compatibility with conventional wiring (improving ease of operation) while enabling advanced LED control features (maintaining energy efficiency benefits)
Solution Approach 2:
A communication circuit is introduced as an intermediary between the existing power wiring and the LED control system. This communication circuit carries control signals through the existing two-wire infrastructure, enabling LED adjustment without requiring separate control wiring (reducing infrastructure changes while maintaining control functionality)
2Loss of energy
If conventional light bulbs are replaced by LED lamps, then energy efficiency is improved, but infrastructure changes are required
Solution Approach 1:
The existing two-wire AC power infrastructure is made multi-functional by enabling it to carry both power delivery and control communication signals. This eliminates the need for separate control wiring (reducing infrastructure complexity) while maintaining full LED control capability (preserving energy efficiency)
3Temperature
If LED lamps are used, then heat dissipation is reduced, but light adjustment control becomes more complex
Solution Approach 1:
A communication circuit acts as an intermediary that translates user input (such as remote control signals or wall switch commands) into appropriate LED driving parameters. This simplifies the user interface (reducing control complexity) while maintaining precise control over LED luminance and color temperature (preserving thermal management)
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 seamless transition from conventional light bulbs to LED lamps by allowing for precise control of luminance and light adjustments, reducing heat dissipation, and enhancing energy efficiency while minimizing user inconvenience.
Implementation Method 1
The phase modulating circuit is coupled to an alternating current (AC) power source, for generating a phase modulating voltage, wherein the phase modulating circuit partially restrains AC power received from the AC power source for a waveform of the phase modulating voltage to comprise a non-conduction angle
Implementation Method 2
The rectifying circuit is coupled to the phase modulating circuit and the AC power source for rectifying the phase modulating voltage so as to generate a DC (direct current) voltage
Data Source
AI summary
A two-wired LED light adjusting system, for controlling the luminance adjustment for a LED lamp module. The light adjusting circuit includes a phase modulating circuit, a LED driving circuit and a controller. The phase modulating circuit generates a phase modulating voltage. The controller detects the phase modulating voltage of various waveforms. When the controller detects the phase modulating voltage of different waveforms, the controller controls the LED driving circuit to enable the LED lamp module to emit light of different luminance according to waveforms of the phase modulating voltage.