Light Control System Daylight Compensation
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Solution Overview
Problem
Existing methods for controlling light sources to achieve desired color or color temperature are inefficient, leading to transient responses and failure to account for the influence of daylight, resulting in inconsistent illumination.
Innovation Solution
A method that calculates and adjusts control values for light sources based on the current color locus, intensity, and influence of natural daylight to achieve the desired color temperature, with a feedback loop to ensure accuracy and suppress transient behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor points at the area to be illuminated to determine the actual color and a control unit adjusts the light output through regulation, then the desired color tone or color temperature can be achieved, but transient responses occur causing strong changes before the desired hue is reached
Solution Approach 1:
The control unit calculates the required light output values in advance based on the desired color temperature and the measured influence of natural daylight, rather than adjusting through iterative regulation. This preliminary calculation determines the exact control values needed to achieve the target color when mixed with daylight, eliminating transient responses and providing direct, stable control.
2Measurement precision
If regulation is used to adjust light output to achieve desired color temperature, then color accuracy can be improved, but the method does not account for the influence of natural daylight leading to inconsistent illumination
Solution Approach 1:
A sensor measures the influence of natural daylight entering the room, and this measurement serves as an intermediary parameter that the control unit uses to calculate the appropriate light output. By incorporating this intermediary measurement of daylight conditions, the system adapts to varying environmental lighting and maintains consistent color temperature accuracy despite changes in natural light.
3Reliability
If control methods account for daylight influence through sensor measurement and calculation, then illumination consistency can be improved, but the system complexity increases
Solution Approach 1:
The system replaces complex iterative mechanical regulation with a calculation-based approach. The control unit uses a calculation method that directly determines the required light output values based on measured daylight influence and desired color temperature, substituting iterative adjustment mechanisms with mathematical computation to achieve consistent illumination with simpler control logic.
Data Source
AI summary
The method involves determining actual color location of al illumination in a region to be illuminated. Intensity and chromaticity of light emitted from a light sources (107, 108, 109) e.g. LEDs, is determined. Impact of natural daylight is calculated, and a control value for the light sources is calculated and transmitted, where the control value produces an illumination with a color temperature with mixing of the light emitted from the light sources with a daylight and corresponds to the predetermined target value and the LED emits light in different colors such as red, green and blue.