LED Color Locus Stabilization via Temperature Calibration
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Solution Overview
Problem
Conventional lighting systems using three individual colors are unsatisfactory in terms of lighting characteristics, and require complex and expensive optical sensors to adjust and stabilize the color locus, especially due to temperature effects in LEDs.
Innovation Solution
A method to set a color locus of a lighting system without optical sensors, by determining the temperature and brightness of light sources based on calibration data, converting these into an actual color locus, and iteratively adjusting the light sources to reach a target color locus, thereby compensating for temperature-induced fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical sensors are used to monitor and adjust the color location of light sources, then the color locus can be accurately stabilized, but the system becomes complex and expensive
Solution Approach 1:
The patent replaces optical sensors (optical measurement system) with a temperature measurement system. Instead of using complex optical sensors to detect color location deviations, the invention measures the temperature of light sources (especially LEDs) and uses predetermined calibration data to determine brightness and wavelength based on temperature. This substitution eliminates the need for expensive optical sensors while maintaining color locus stabilization capability.
Solution Approach 2:
The patent creates a mathematical model that copies the relationship between temperature and color characteristics (brightness and wavelength) through predetermined calibration data. This model allows the system to predict color location based on temperature measurements, effectively creating a virtual representation of color characteristics without direct optical measurement.
2Adaptability or versatility
If more than three individual colors are used in lighting systems, then lighting characteristics improve, but the system becomes more complex
Solution Approach 1:
The patent uses parameter changes (temperature) to control the brightness and wavelength of multiple light sources. By measuring temperature and using calibration data to determine the corresponding brightness and wavelength parameters, the system can adjust multiple light sources to achieve desired lighting characteristics without requiring complex real-time control algorithms for each individual color channel.
3Stability of the object's composition
If temperature effects are compensated for in real-time, then color consistency is maintained, but measurement and control complexity increases
Solution Approach 1:
The patent performs preliminary action by creating predetermined calibration data that establishes the relationship between temperature and color characteristics (brightness and wavelength) before actual operation. This calibration data is stored and used during operation to directly determine color parameters from temperature measurements, eliminating the need for complex real-time calculation and control algorithms.
Solution Approach 2:
The system uses the temperature measurement itself to determine the color characteristics. The temperature data serves dual purposes: it indicates the thermal state of the light source and, through the calibration model, directly provides the brightness and wavelength information. This self-service approach eliminates the need for separate color measurement and control systems.
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
This approach allows for efficient compensation of temperature effects in lighting modules, stabilizing the color locus without the need for expensive optical sensors, enabling user-defined color tone and brightness settings while maintaining color consistency.
Implementation Method 1
wherein the temperature of the at least one light source is determined
Implementation Method 2
a temperature of the light module is additionally determined
Implementation Method 3
Different light sources, in particular light-emitting diodes and/or combinations of light-emitting diodes of different wavelengths
Implementation Method 4
light-emitting diodes of different wavelengths are used as light sources
Implementation Method 5
the brightness and the wavelength of the at least one light source are converted into an actual color locus
Data Source
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AI summary
The invention relates to a method and an arrangement for setting a color location, wherein a temperature is determined, and the color location of the illumination source is set as a function of the temperature that is determined. The invention further provides an illumination system comprising an arrangement for setting the color location.