Microcontroller LED Security Light With Touchless Solid-State Switching
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Solution Overview
Problem
Existing electronic switches, particularly mechanical and infrared sensor-based solutions, 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 that incorporates a detection means and a controllable semiconductor switching element, allowing for touchless operation and efficient power control through message-carrying sensing signals, enabling on/off switch control and dimming functions without generating electric arcs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical-type electric switch is used, then manual on/off control is achieved, but electric sparks are generated causing safety hazards in gas-prone environments
Solution Approach 1:
The patent replaces the mechanical switch system with a solid-state electronic switch system. The mechanical contact-based switching is substituted with semiconductor triac-based electronic switching, eliminating physical contact between metal conductors and thereby preventing electric spark generation. This substitution maintains the on/off control function while removing the harmful spark generation mechanism.
2Ease of operation
If infrared sensor-based touchless switch is used, then contamination risks are reduced, but device complexity increases
Solution Approach 1:
The patent introduces a detection means as an intermediary between the user and the electronic switch. This detection means senses external control signals (such as hand presence or gesture) and converts them into message-carrying sensing signals that the microcontroller can interpret. This intermediary layer enables touchless operation while keeping the overall system architecture manageable through standardized signal processing.
3Reliability
If solid-state electronic switch with mechanical toggle is used, then electric arc is avoided, but hand contact is required causing contamination concerns
Solution Approach 1:
The patent replaces the mechanical toggle or spring button with a touchless detection interface. The mechanical actuation mechanism is substituted with an optical or electromagnetic sensing system that detects external control signals without requiring physical contact. This maintains the safety benefits of solid-state switching while eliminating the contamination risk associated with hand contact.
4Adaptability or versatility
If conventional electronic switch is used, then on/off control is achieved, but dimming control and power management efficiency are insufficient
Solution Approach 1:
The patent implements a universal electronic switch design that can perform multiple functions including on/off control, dimming control, and timer management through a single integrated system. The microcontroller-based architecture with detection means and controllable semiconductor switching elements provides a platform that can be programmed to execute various control modes, eliminating the need for separate circuits for each function and reducing overall system complexity.
Data Source
AI summary
An inter-linkable LED security light is disclosed which is configured with an LED load, a detection device, a switching circuitry, a microcontroller and a wireless transmitter. When an external control signal is detected by the detection device, the external control signal is converted into a message carrying sensing signal and the microcontroller responsively operates to output a control signal to turn on the security light for a predetermined time duration, synchronously the microcontroller also manages to transmit the message sensing signal thru the wireless transmitter to control the same lighting performance of at least one neighboring light. The detection device is optionally an active infrared ray motion sensor, a passive infrared ray motion sensor, an ultrasonic wave sensor, a microwave sensor capable of detecting a motion intrusion or a photo sensor capable of detecting a light intensity of a detection area where the lighting apparatus is positioned.