Additive Light Fixture Color Control Across Variable Beam Angles
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Solution Overview
Problem
Inherent variations in LED light sources lead to inconsistencies in the colors of lights emitted by light fixtures, making it difficult to achieve a desired target color in additive lighting systems.
Innovation Solution
A controller adjusts the power provided to LED-optics clusters based on measured color values to control the resultant color of combined light beams, ensuring they match a target color by accounting for variations in individual LED emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple LEDs are used in additive lighting systems to achieve desired beam angles, then lighting flexibility and beam angle control are improved, but inherent LED variations cause color inconsistencies and make it difficult to achieve target colors
Solution Approach 1:
The system performs preliminary characterization of each LED's color properties before use. A controller measures and stores color values for each LED, then uses this pre-acquired data to calculate and adjust power distribution to individual LEDs, ensuring that the combined light from multiple LEDs achieves the desired target color despite inherent LED variations
Solution Approach 2:
The system changes the power parameter provided to each LED based on its measured color characteristics. By adjusting the power levels of individual LEDs with different color properties, the controller optimizes the combined output to achieve the target color, transforming a static LED array into a dynamically adjustable color mixing system
2Adaptability or versatility
If LEDs with different color shades are combined to achieve target colors, then color flexibility is improved, but inherent LED variations lead to inconsistencies in the colors of lights provided by different LED light sources
Solution Approach 1:
The system implements a feedback mechanism where the controller measures the actual color output of each LED and uses this information to adjust the power distribution. By continuously monitoring and adjusting based on measured color values, the system compensates for LED variations and maintains consistent target color achievement across different LED combinations
3Manufacturing precision
If power is adjusted to individual LEDs to account for variations, then color accuracy is improved, but system complexity increases due to the need for measuring and controlling each LED individually
Solution Approach 1:
The controller serves as an intermediary that simplifies the complexity of managing multiple LEDs with different color properties. Instead of requiring complex hardware adjustments for each LED, the controller uses software-based power distribution calculations based on measured color values, centrally managing the color mixing process and reducing the need for complex physical control mechanisms
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 compensates for LED variations, allowing additive lighting systems to produce light with consistent colors that accurately match user-specified targets.
Implementation Method 1
light emitting diode (LED) light sources
Data Source
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AI summary
A method of controlling a color of a light provided by a light fixture includes obtaining measured color values of first lights and measured color values of second lights. The method includes determining a resultant color of a first light beam at least based on the measured color values of the first lights and determining a resultant color of a second light beam at least based on the measured color values of the second lights. The method includes controlling first power provided to LEDs of a first LED-optics cluster and second power provided to LEDs of a second LED-optics cluster at least based on the resultant color of the first light beam and the resultant color of the second light beam such that a color of a combined light that is a combination the first light beam and the second light beam has a color matching target color, wherein the relative contributions of individual lights of the first lights to the first light beam are determined based on a value of a target beam angle of the combined light and wherein the relative contributions of individual lights of the second lights to the second light beam are determined based on the value of the target beam angle of the combined light.