LED Luminaire Light Sensor Feedback Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automated luminaires with LED light sources face challenges in maintaining consistent light output over time due to usage patterns and environmental factors, leading to uneven light distribution across multiple fixtures, which is difficult for users to compensate for without trial and error or individual measurement.
Innovation Solution
A luminaire system equipped with an LED light source, a light sensor, and a control system that measures and compares current light intensity to previous data, adjusts the light output by emitting an indicator color to signify intensity reduction and allows for data-driven adjustments to match light outputs across fixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If LED luminaires are used with automated control, then remote control of pan, tilt, and color parameters is improved, but light output consistency deteriorates over time due to LED degradation
Solution Approach 1:
The system incorporates light sensors that continuously measure the actual light output of each LED luminaire and feed this information back to the control system. This feedback mechanism enables real-time detection of LED degradation and automatic adjustment of control parameters to maintain consistent light output across all luminaires, resolving the contradiction between automated control and output stability.
Solution Approach 2:
The control system dynamically adjusts operational parameters (such as LED drive current or dimming levels) based on measured light output data. By changing these parameters in response to detected degradation, the system compensates for LED aging and maintains consistent light output, thereby resolving the stability issue while preserving automated control capabilities.
2Manufacturing precision
If individual measurement and adjustment of each luminaire is performed, then light output matching is improved, but user effort and time required deteriorate
Solution Approach 1:
Each luminaire is equipped with integrated light sensors and control electronics that enable it to self-measure its light output and self-adjust its operational parameters. This self-service capability eliminates the need for manual measurement and adjustment by users, achieving precise light output matching automatically while significantly reducing the time and effort required.
Solution Approach 2:
The system uses continuous feedback from light sensors to automatically monitor and adjust each luminaire's output. This automated feedback loop performs the matching function continuously without user intervention, achieving high precision light output consistency while eliminating the time-consuming manual adjustment process.
3Duration of action of moving object
If LED light sources operate continuously, then illumination coverage is improved, but light intensity degradation accelerates
Solution Approach 1:
Light sensors continuously monitor the output of operating LED luminaires and provide feedback to the control system. When degradation is detected, the system automatically adjusts parameters to compensate, maintaining stable light intensity even during continuous operation. This real-time monitoring and adjustment resolves the contradiction between duration of operation and intensity stability.
Solution Approach 2:
The control system dynamically adjusts operational parameters based on real-time measurements from light sensors. Rather than operating at fixed settings, the system adapts its control parameters in response to detected degradation, maintaining consistent light output throughout continuous operation and resolving the stability issue.
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
Enables users to easily determine and adjust light output reductions, ensuring that luminaires emit more consistent light, simplifying the process of maintaining even illumination across a system by using indicator colors and data-driven adjustments.
Implementation Method 1
The light sensor is optically coupled to the LED light source, measures an intensity of the light beam, and produces an intensity signal based on the measured intensity
Data Source
AI summary
A luminaire has a light-emitting diode (LED) light source, a light sensor, and a control system. The control system receives a Measure command measure the current intensity of the LED light source. The control system measures the intensity using the light sensor, stores current intensity data in non-volatile memory, obtains the LED light source's previous intensity, selects an indicator color representing how much the current intensity is reduced from the previous intensity, and causes the luminaire to emit a light beam having the indicator color. The control system also receives an Adjust command to reduce the LED light source to a total intensity reduction amount. The control system obtains the LED light source's current reduction amount, determines whether the total intensity reduction amount is more than the current reduction amount, and, if so, causes the LED light source to emit a reduced intensity light beam.