LED Array Ambient Light Sensing and Control
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Solution Overview
Problem
Existing lighting systems, particularly those using LEDs, face challenges in efficiently adjusting lighting levels based on ambient light conditions, leading to unnecessary energy consumption and inadequate safety lighting in areas like office buildings and parking lots, due to limitations in current mechanical switches, timers, and photo-diode sensors.
Innovation Solution
An intelligent lighting control system that includes an intelligent power control, AC and DC power supplies, LED arrays capable of light emission, detection, and data transmission, using PWM drivers and light sensors to adjust lighting based on ambient light levels, transmitting control signals through power wires or light/infrared signals, and employing a processor to determine optimal duty cycles for energy efficiency and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional mechanical switches or timers are used to control lighting, then the system structure is simple, but the lighting cannot be dynamically adjusted based on ambient light conditions, leading to energy waste
Solution Approach 1:
The patent combines multiple functions into the LED array: light emission, ambient light detection, and data transmission. By integrating the photodetector and light emitter into a single LED component, the system eliminates the need for separate sensors and switches, reducing device complexity while enabling dynamic energy adjustment through ambient light sensing
Solution Approach 2:
The LED array serves multiple purposes: it provides illumination, detects ambient light levels through its photodetector capability, and transmits control data optically. This multi-functionality allows the system to achieve intelligent energy management without adding separate components, thus reducing overall system complexity while improving energy efficiency
2Loss of energy
If photo-diode sensors are used to detect ambient light and turn off lighting, then the lighting can be turned off at certain ambient light levels, but the system cannot maintain minimum energy consumption and requires additional wiring complexity
Solution Approach 1:
The patent merges the lighting function and ambient light sensing function into a single LED array. The LED can operate in both light-emitting mode and light-detection mode, eliminating the need for separate photo-diode sensors and their associated wiring. This integration reduces wiring complexity while maintaining the ability to adjust lighting based on ambient conditions
Solution Approach 2:
The patent uses optical signals as an intermediary to transmit control data between components. Instead of using electrical wiring for control signals, the system modulates light from the LED array to carry control information, which is then detected by photodetectors. This approach reduces wiring complexity while enabling intelligent control
3Reliability
If LED arrays operate continuously to provide sufficient lighting, then safety and security are ensured, but enormous energy is wasted when sufficient ambient lighting already exists
Solution Approach 1:
The patent implements dynamic lighting control by continuously monitoring ambient light levels through the LED's photodetector capability and adjusting the LED output accordingly. The system transitions from static continuous operation to dynamic adjustment, maintaining sufficient lighting for safety while reducing energy consumption when ambient light is adequate
Solution Approach 2:
The system uses the LED array's photodetector to sense ambient light levels and feeds this information back to the control circuitry. Based on this feedback, the system automatically adjusts the LED output to maintain appropriate lighting levels, ensuring safety while minimizing energy waste when ambient lighting is sufficient
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 effectively adjusts LED lighting to match ambient conditions, minimizing energy consumption while ensuring sufficient safety lighting, by using a combination of light detection and control signal modulation to optimize the duty cycle of LED arrays.
Implementation Method 1
an intelligent lighting system configured to provide lighting through a plurality of lighting light-emitting diodes (LED) arrays, and (e) a DC power supply configured to provide DC power supply to control circuits and the plurality lighting LED arrays
Implementation Method 2
an intelligent lighting system configured to provide lighting through a plurality of lighting light-emitting diodes (LED) arrays
Data Source
AI summary
One aspect of the present disclosure relates to an intelligent lighting control system for controlling a lighting LED array. The intelligent lighting control system includes: (a) an intelligent power control configured to allow an operator to control the lighting of an intelligent lighting system, (b) an AC power source configured to provide AC power to the intelligent lighting system, (c) an intelligent power supply configured to combine the control signal from the intelligent power control and AC power supply from the AC power source, (d) an intelligent lighting system configured to provide lighting through a lighting LED array, and (e) a DC power supply configured to provide DC power supply to control circuits and the lighting LED array.