LED Control System for Dimmer-Modulated AC Line Voltage
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Solution Overview
Problem
Existing LED-based illumination systems face challenges in effectively controlling the intensity and color of light due to the limitations of AC dimmer switches originally designed for incandescent light sources, requiring improved apparatus and methods to manage dimmer-modulated AC line voltage.
Innovation Solution
A control system that operates in multiple modes to adjust the characteristics of LEDs in response to dimmer-modulated AC line voltage, switching between intensity and color modes based on mode change conditions and remaining in a selected mode until a predetermined time period or further changes occur, ensuring efficient control of light intensity and color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If AC dimmer switches originally designed for incandescent light sources are used to control LED-based illumination apparatus, then the existing lighting infrastructure can be utilized, but the control precision and performance of LED intensity and color adjustment deteriorates
Solution Approach 1:
The patent introduces an intermediary control system that sits between the existing AC dimmer switch and the LED illumination apparatus. This intermediary processor receives the dimmer-modulated AC line voltage signal, interprets it, and translates it into precise control signals for the LEDs. The intermediary converts the analog dimmer signal into digital control commands that can accurately adjust LED intensity and color temperature, thereby maintaining compatibility with existing dimmer infrastructure while achieving precise LED control.
2Adaptability or versatility
If multiple control modes are implemented to adjust different characteristics of LEDs, then the versatility of light control is improved, but the device complexity increases
Solution Approach 1:
The patent implements a universal control system that can perform multiple functions through a single integrated processor. The control system is designed to handle various LED characteristics (intensity, color temperature, timing) through a unified architecture that interprets dimmer signals differently based on the selected mode. Rather than requiring separate control circuits for each LED characteristic, the system uses one multi-functional processor that can switch between different control algorithms and output types, thereby achieving versatility without proportionally increasing complexity.
Solution Approach 2:
The control system employs dynamic mode switching that adapts its behavior based on the selected operating mode. The processor dynamically changes its control strategy - in intensity mode it adjusts LED brightness, in color mode it modifies color temperature, and in timing mode it controls illumination duration. This dynamic adaptability allows the system to provide multiple control functions while maintaining a relatively simple underlying hardware architecture, as the complexity is managed through software/firmware logic rather than additional physical components.
3Extent of automation
If mode change conditions are detected based on dimmer-modulated AC line voltage patterns, then the automation of control mode switching is improved, but the difficulty of detecting and measuring appropriate mode change conditions increases
Solution Approach 1:
The system implements feedback mechanisms that monitor the dimmer-modulated AC line voltage characteristics and automatically adjust the control mode accordingly. The processor continuously analyzes the incoming dimmer signal patterns, detecting changes in voltage modulation depth, frequency, or waveform characteristics that indicate user intent. When specific voltage patterns are detected (such as rapid adjustments or extreme position holding), the system automatically transitions between intensity control mode, color control mode, and timing control mode. This feedback-based automation simplifies user interaction while the processor handles the complexity of pattern recognition and mode selection.
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 precise control of light intensity and color in LED-based illumination systems, maintaining consistent performance across a range of dimmer switch positions and AC line voltage conditions, optimizing energy usage and user experience.
Implementation Method 1
Light-emitting diodes (LEDs) may be used in illumination apparatus for lighting rooms or other indoor or outdoor areas
Implementation Method 2
By modulating the intensity of light from each different colored LED, such illumination apparatus may provide light having a range of intensities and colors
Data Source
AI summary
An illumination apparatus comprises a plurality of LEDs and a control system connected to receive dimmer-modulated AC line voltage and control the LEDs. The control system is configured to operate in a plurality of different modes wherein changes in dimmer-modulated AC line voltage adjust various characteristic of the LEDs.