Touchless LED Color Temperature Tuning With Solid-State Switching
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Solution Overview
Problem
Existing lighting systems, particularly those using mechanical switches, pose safety concerns in explosive environments and are not suitable for touchless operation, and existing touchless solutions are complex or inefficient in controlling power transmission to LED loads.
Innovation Solution
A microcontroller-based electronic switch with controllable semiconductor devices and a detection system, such as an infrared ray sensor or electrostatic induction sensor, that converts external motion signals into control signals to manage on/off, dimming, and color temperature tuning of LED lighting loads, ensuring safe and efficient power control without physical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical switches are used for controlling LED lighting, then the control mechanism is simple and reliable, but electrical arcs are generated which pose safety concerns in explosive environments and prevent touchless operation
Solution Approach 1:
The patent replaces mechanical switches with solid-state electronic switching devices (transistors, triacs, or IGBTs) that are controlled by detection devices such as infrared sensors or electrostatic induction sensors. This substitution eliminates electrical arcs generated by mechanical contact while enabling touchless operation through motion detection or proximity sensing, thereby resolving the contradiction between safety in explosive environments and touchless operation capability.
2Ease of operation
If touchless control solutions are implemented using detection devices, then touchless operation is enabled, but the system complexity increases and control efficiency decreases
Solution Approach 1:
The patent introduces detection devices (infrared sensors or electrostatic induction sensors) as intermediaries between the user and the lighting system. These sensors detect motion or proximity without requiring physical contact, and their output signals directly control the solid-state switching devices. This intermediary approach enables touchless operation while maintaining relatively simple system architecture by using well-established sensor technologies and straightforward control logic.
3Adaptability or versatility
If multiple separate control mechanisms are used for on/off switching, dimming, and color temperature tuning, then each function can be optimized independently, but the overall device complexity and operational difficulty increase
Solution Approach 1:
The patent integrates multiple control functions (on/off switching, dimming, and color temperature tuning) into a single unified control system. The detection device generates control signals that are processed by a microcontroller or control circuit to simultaneously manage multiple solid-state switching devices, each controlling different aspects of LED output. This allows a single touchless interface to perform multiple functions, reducing the number of separate controls needed while maintaining full functionality.
Solution Approach 2:
The patent combines multiple control functions into a single integrated control mechanism. Instead of separate switches for on/off, dimming, and color temperature adjustment, the system uses one detection device that generates control signals for all functions. The control circuit merges these functions by processing sensor input and coordinating multiple switching devices to achieve combined control of illumination level and color temperature, thereby simplifying the user interface while preserving adaptability.
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 provides a safe, efficient, and user-friendly method for controlling LED lighting systems, avoiding electrical arcs and allowing for seamless integration of touchless operation and color temperature tuning within a single control mechanism, enhancing safety and operational simplicity.
Implementation Method 1
A microcontroller-based electronic switch with controllable semiconductor devices and a detection system, such as an infrared ray sensor or electrostatic induction sensor, that converts external motion signals into control signals
Implementation Method 2
A first controllable switching device electrically connected in series with a power source and a first LED lighting load for emitting light with a first color temperature, and a second controllable switching device electrically connected in series with the power source and a second LED lighting load for emitting light with a second color temperature
Data Source
AI summary
A theory and a technical foundation for building a technical framework of a color temperature tuning technology are disclosed, composing a power allocation algorithm and a power allocation circuitry, wherein the power allocation algorithm is a software for designing a process of dividing and sharing a total electric power between at least a first LED load emitting light with a first color temperature CT1 and a second LED load emitting light with a second color temperature CT2 to generate at least one paired combination of a first electric power X allocated to the first LED load and a second electric power Y allocated to the second LED load to create at least one mingled light color temperature CTapp thru a light diffuser according to color temperature tuning formulas CTapp=CT1·X/(X+Y)+CT2·Y/(X+Y) and X+Y=constant; and the power allocation circuitry is a hardware designed for implementing the process.