LED Color Temperature Blending With Constant Light Output
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Solution Overview
Problem
Existing lighting control systems, particularly those using mechanical switches, pose safety concerns in gas-explosive environments due to the risk of electric sparks and require manual operation, which is unsuitable for hygiene-sensitive areas like kitchens and hospitals. Additionally, prior solid-state electronic switches have complex infrared sensor constructions and inefficient power transmission control.
Innovation Solution
A microcontroller-based electronic switch with controllable switching elements and a detection device, such as an infrared ray sensor or electrostatic induction sensor, that converts external motion signals into message-carrying sensing signals to control the conduction state and power transmission levels to lighting loads, enabling touchless operation and efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical switches are used for lighting control, then manual operation is simple and direct, but electric sparks are generated causing safety concerns in gas-explosive environments
Solution Approach 1:
The patent replaces mechanical switches with solid-state electronic switches that use semiconductor devices (triacs, transistors) to control lighting circuits. This substitution eliminates the mechanical contact between metal conductors that generates electric sparks, thereby resolving the safety issue in gas-explosive environments while maintaining reliable on/off control functionality
2Ease of operation
If mechanical switches are used for lighting control, then the structure is simple, but manual contact is required which is unsuitable for hygiene-sensitive areas
Solution Approach 1:
The patent replaces manual mechanical switching with touchless electronic control using sensor devices. The sensor detects user presence or gestures and automatically triggers the solid-state switch to control lighting, eliminating the need for physical contact while managing complexity through integrated sensor-switch design
Solution Approach 2:
The patent introduces sensor devices as intermediaries between the user and the lighting control system. The sensor acts as a mediator that detects user intent without physical contact and translates it into electrical control signals for the solid-state switch, enabling touchless operation in hygiene-sensitive environments
3Ease of operation
If solid-state electronic switches with infrared sensors are used, then touchless operation is enabled, but the sensor construction becomes complicated
Solution Approach 1:
The patent integrates multiple functions into a single solid-state electronic switch device, combining the sensor detection capability, control logic, and switching functionality in one unit. This multi-functionality approach reduces overall system complexity compared to separate sensor and switch components, while maintaining touchless operation capability
4Reliability
If prior solid-state electronic switches are used, then electric arcs are avoided, but power transmission control is inefficient
Solution Approach 1:
The patent implements dynamic power transmission control using solid-state electronic switches that can continuously adjust their conduction state. The switches respond to sensor signals by dynamically controlling the amount of power transmitted to lighting loads, enabling efficient power management while maintaining arc prevention through solid-state operation without mechanical contact
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, user-friendly, and efficient control system for lighting apparatuses, preventing electric arcs and allowing for touchless operation, efficient power management, and adjustable color temperature blending, addressing the limitations of existing technologies.
Implementation Method 1
a detection device, such as an infrared ray sensor or electrostatic induction sensor, that converts external motion signals into message-carrying sensing signals
Implementation Method 2
a detection device, such as an infrared ray sensor or electrostatic induction sensor, that converts external motion signals into message-carrying sensing signals
Implementation Method 3
The first controllable switching element is electrically connected between a power source and a first lighting load for emitting light with a first color temperature
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 unchanged while the mingled color temperature is being adjusted.