Flash Lighting Spectral Power Distribution Optimization
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Solution Overview
Problem
Traditional flash lighting systems provide high-intensity light that often results in unnatural illumination of targets due to mismatched correlated color temperatures and insufficient illuminance, leading to poor color rendition and detail loss in imaging applications.
Innovation Solution
A method and system that measure existing light conditions to determine and generate flash light spectral power distributions that combine with ambient light to achieve desired color attributes, such as matching illuminance and correlated color temperature, using advanced LED technology and intelligent control systems to create customizable and optimized combined light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional flash lighting provides high-intensity light, then illuminance is sufficient, but color rendition becomes unnatural due to mismatched correlated color temperatures
Solution Approach 1:
The flash lighting system is divided into multiple independent LED channels (e.g., blue LED and yellow LED channels) that can be controlled separately. This segmentation allows independent adjustment of spectral components to match both illuminance requirements and color temperature characteristics, resolving the contradiction between sufficient illumination and natural color rendition.
Solution Approach 2:
The system dynamically changes the spectral power distribution parameters of the flash light by adjusting the intensity ratios of different LED channels based on measured ambient light conditions. This parameter adjustment enables the combined light to achieve desired correlated color temperatures while maintaining sufficient illuminance, thereby improving color rendition quality without sacrificing brightness.
2Illumination intensity
If flash light duration is extended to improve illumination, then illuminance increases, but flash effectiveness decreases due to loss of short-duration lighting advantage
Solution Approach 1:
The system combines continuous ambient light with flash light illumination, creating a continuous useful lighting action. The flash supplement enhances the ambient light during brief intervals, providing sufficient illuminance without requiring extended flash duration, thus preserving the advantage of short-duration lighting while maintaining improved illumination.
3Ease of manufacture
If multiple LED channels are used to achieve desired spectral power distribution, then color quality improves, but device complexity increases
Solution Approach 1:
Multiple LED channels serve multiple functions simultaneously: they provide both illumination and spectral shaping capabilities. The same blue and yellow LED channels that generate light also control the spectral power distribution to achieve desired color temperatures and renderings, eliminating the need for separate spectral adjustment mechanisms and reducing overall device complexity.
Solution Approach 2:
The system achieves diverse color qualities by changing the intensity parameters of existing LED channels rather than adding complex spectral adjustment components. By dynamically adjusting the ratio of blue to yellow LED output, the system can produce various correlated color temperatures and color renderings, improving color quality while keeping the device structure relatively simple.
4Illumination intensity
If flash light intensity is increased to improve illumination, then illuminance is sufficient, but disturbance to lighting environment increases due to incompatibility with existing light
Solution Approach 1:
The system dynamically adjusts the spectral parameters (color temperature, spectral power distribution) and intensity of the flash light based on real-time measurement of ambient lighting conditions. This parameter adaptation ensures the flash light is compatible with the existing lighting environment, reducing disturbance while maintaining sufficient illuminance for proper target characterization.
Solution Approach 2:
The system employs feedback control by measuring ambient light conditions and using this information to adjust flash light characteristics. The measured ambient light spectrum and intensity inform the optimization of flash spectral power distribution and intensity, ensuring the combined light achieves desired illuminance without creating harsh contrasts or color mismatches that would disturb the lighting environment.
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 provides high-color-quality, tunable light that enhances the visualization of targets by matching desired color attributes and illuminance levels, improving color rendition and detail preservation in imaging applications.
Implementation Method 1
flash light-emitting diode (LED) illumination has been used as flash sources
Data Source
AI summary
Flash light-generating methods and systems are provided, which, in one aspect, include: obtaining one or more measurements of existing light on or around an illumination target; ascertaining a desired color attribute(s) for a combined light to be provided on the illumination target, the combined light including the existing light and a flash light to be generated; determining a flash light spectral power distribution of illumination which achieves a combined light spectral power distribution of illumination on the illumination target having the desired color attribute(s), the determining using, in part, the measurement(s) of existing light, and the desired color attribute(s) for the combined light; and generating the flash light with the determined flash light spectral power distribution of illumination to provide the combined light on the illumination target having the combined light spectral power distribution of illumination with the desired color attribute(s).