LED Color Temperature Switching with Complementary Power Control
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Solution Overview
Problem
Existing electronic switches, particularly mechanical and infrared sensor-based systems, face limitations in safety, efficiency, and user convenience for controlling lighting and electrical appliances, especially in environments prone to gas explosions and contamination risks.
Innovation Solution
A microcontroller-based electronic switch system that utilizes controllable semiconductor switching elements and various detection devices (infrared ray sensors, electrostatic induction sensors, and direct touch interfaces) to provide safe, efficient, and user-friendly control over lighting loads with different color temperatures, enabling on/off switching, dimming, and color temperature tuning without physical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical-type electric switch is used for on/off control, then manual operation is simple, but electric sparks are generated causing safety hazards in gas explosion-prone environments
Solution Approach 1:
The patent replaces the mechanical switch system with a solid-state electronic switch system. Instead of using mechanical contacts that open and close circuits, the invention uses semiconductor devices (triacs, transistors) controlled by electronic signals to achieve the same on/off and dimming functions without mechanical movement, thereby eliminating electric spark generation.
Solution Approach 2:
The patent introduces an intermediary control system between the power source and the lighting load. A microcontroller-based electronic switch system acts as an intermediary, using low-voltage control signals to regulate high-voltage power transmission through solid-state components, preventing direct high-voltage contact that would cause sparks.
2Ease of operation
If infrared sensor-based electronic switch is used for touchless control, then user convenience is improved, but device complexity and circuit design become complicated
Solution Approach 1:
The patent creates a universal electronic switch platform that can perform multiple functions (on/off control, dimming, touchless operation) through a single integrated microcontroller-based system. The same hardware platform supports different control modes and can be applied to various lighting loads, reducing overall system complexity compared to dedicated circuits for each function.
Solution Approach 2:
The patent implements self-service functionality through the electronic switch system that automatically detects user presence via sensors and autonomously controls lighting operations. The system monitors sensor inputs and independently makes control decisions without requiring complex external circuitry or manual intervention for basic operations.
3Object-affected harmful factors
If solid-state electronic switch is used to avoid electric arcs, then safety is improved, but control of electric power transmission to various electric impedances becomes inefficient
Solution Approach 1:
The patent implements dynamic control of solid-state switching elements through pulse-width modulation (PWM) and phase-angle control techniques. The microcontroller dynamically adjusts the conduction angle and switching timing of triacs and transistors to precisely regulate power transmission to different lighting loads, enabling efficient power control despite the inherent limitations of solid-state components.
Solution Approach 2:
The patent changes key operational parameters of the solid-state switching elements, including switching frequency, conduction angle, and gate trigger timing. By dynamically adjusting these parameters, the system optimizes power transmission efficiency to match the specific impedance characteristics of different lighting loads while maintaining the safety advantages of solid-state operation.
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 system ensures safe operation by avoiding electrical arcs, enhances user convenience through touchless control, and effectively manages lighting power levels and color temperatures, providing versatile control modes without the need for complex hardware changes.
Implementation Method 1
a detection device for detecting an external motion signal and converting the external motion signal into a message carrying electrical signal
Implementation Method 2
The detection device is an electrostatic induction sensor comprising a copper sheet sensing unit
Data Source
AI summary
A color temperature switching scheme for an LED lighting device is disclosed. The color temperature switching scheme comprises a plurality of different color temperature performances correspondingly generated by a plurality of different paired combinations of a first electric power allocated to a first LED load emitting a light with a first color temperature and a second electric power allocated to a second LED load emitting a light with a second color temperature such that a mingled color temperature between the first color temperature and the second color temperature can be generated thru a light diffuser. For tuning the mingled color temperature of the LED lighting device a reverse yet complementary power adjustment process for distributing a total electric power T between the first LED circuit and the second LED circuit is required such that a total light intensity remains essentially unchanged while the mingled color temperature is being adjusted.