Light Color Sensor Calibration Matrix for Circadian Lighting
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Solution Overview
Problem
Current lighting systems lack an efficient method to automatically adjust color temperature and intensity to synchronize with natural circadian rhythms, leading to potential misalignment of internal clocks and suboptimal environmental conditions for human health and productivity.
Innovation Solution
A light color sensor system that detects ambient light color and intensity, using a diffuser and light color sensing module to determine spectral power distribution, and calibrates readings through a matrix correlation with natural sunlight conditions, enabling automatic adjustment of lighting systems to match external light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment of color temperature is provided through graphical user interfaces, then users can control lighting color, but the interface becomes confusing and prone to human error
Solution Approach 1:
The system automatically detects ambient light color temperature through sensors and adjusts the lighting system without requiring manual user input. The control processor compares detected color temperature with target values and autonomously adjusts LED output to maintain optimal circadian alignment, eliminating the need for complex graphical user interfaces.
2Productivity
If automatic circadian lighting control is implemented, then optimal environmental conditions for health and productivity are achieved, but system complexity increases
Solution Approach 1:
The system continuously monitors ambient light color temperature through sensors and feeds this information back to the control processor. The processor compares detected values with target circadian values and automatically adjusts lighting system parameters, creating a closed-loop control system that maintains optimal conditions without complex user intervention.
Solution Approach 2:
The lighting system serves multiple functions: it provides illumination, automatically adjusts color temperature for circadian rhythm alignment, and responds to ambient light conditions. By integrating sensing and control capabilities into a unified system, the patent achieves multi-functionality without proportionally increasing complexity.
3Measurement precision
If precise color temperature measurement is required for circadian alignment, then measurement accuracy improves, but sensor calibration complexity increases
Solution Approach 1:
The system performs preliminary calibration by detecting the color temperature of known reference light sources (such as natural sunlight at specific times) and storing these as target values. This pre-calibration establishes a baseline for subsequent automatic adjustments, simplifying ongoing operation while maintaining measurement precision.
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 ensures optimal circadian rhythm alignment by automatically adjusting lighting to match natural light conditions, enhancing human health, productivity, and comfort while reducing energy consumption.
Implementation Method 1
a sensor body having at least one diffuser, and a light color sensing module disposed below the at least one diffuser
Data Source
AI summary
A method and an ambient light color sensor adapted to determine color of ambient light comprising a memory, a processor, and a light color sensor with a plurality of channels that detect light at different wavelengths. Wherein the memory comprises a calibration matrix determined by calibrating a test light color sensing device under at least one ambient lighting condition, and a normalized gain value for each channel determined by calibrating the ambient light color sensing device to an artificial light source. Wherein the processor receives the sensor readings from the light color sensor, normalizes each received sensor reading using the normalized gain value of a respective channel, determines at least one measured light color value that quantifies color of light from the normalized sensor readings, and determines at least one calibrated light color value by correlating the at least one measured light color value through the calibration matrix.