LED Color Matching Box for Stable D65 Spectral Simulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing color matching observation boxes using halogen tungsten lamps struggle to maintain stable spectral power distribution over time, leading to inconsistent metamerism indices and difficulty in achieving the CLASS A requirement of CIE standard D illuminants, while also being inefficient in power usage.
Innovation Solution
A color matching observation box utilizing LED lamp beads with specific wavelength combinations and hybrid fluorescent powders, combined with additional fluorescent and UV lamps, to achieve stable spectral power distribution and meet CLASS A CIE standard D65 requirements, while enhancing power efficiency and lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If halogen tungsten lamps are used as standard light sources, then the spectral power distribution can initially meet CIE standard requirements, but the metamerism index deteriorates over time and cannot maintain stable quality
Solution Approach 1:
The patent replaces the traditional halogen tungsten lamp with multiple LEDs that have significantly longer service lives (8000+ hours vs. 2000-4000 hours). Although LEDs require multiple components to achieve the spectral distribution, each LED maintains stable output characteristics throughout its extended lifespan, eliminating the gradual deterioration problem of halogen lamps.
Solution Approach 2:
The patent divides the single light source into multiple LED components, each emitting at specific wavelengths (450nm blue LED, 530nm green LED, 630nm red LED). This segmentation allows precise control over the spectral power distribution, maintaining CIE standard compliance throughout the service life of each LED component.
2Measurement precision
If halogen tungsten lamps with light filters are used to simulate D illuminant, then the metamerism index can reach Level A initially, but material composition variations cause inconsistent spectral quality
Solution Approach 1:
The patent assigns specific wavelength responsibilities to different LED types: blue LEDs (450nm) for the blue region, green LEDs (530nm) for the green region, and red LEDs (630nm) for the red region. Each LED type is positioned and configured to contribute specifically to its wavelength region, ensuring consistent spectral power distribution across multiple lamps without material composition variations.
3Stability of the object's composition
If multiple narrow-waveband LEDs are combined to simulate D light source, then the spectral distribution can approach CIE standard, but the spectral curve has significant spikes and is not smooth
Solution Approach 1:
The patent combines multiple LED types with different wavelength characteristics (blue 450nm, green 530nm, red 630nm) in specific proportions within the same light box. This merging of multiple spectral components creates a composite spectral power distribution that smooths out the spikes inherent in individual narrow-waveband LEDs, achieving both CIE standard compliance and spectral smoothness.
4Ease of operation
If halogen tungsten lamps are used in color matching observation box, then the light source can be maintained, but power consumption is high and service life is limited
Solution Approach 1:
The patent replaces high-power halogen tungsten lamps with multiple low-power LEDs. Although multiple LED components are used, each LED consumes minimal power and has an extended service life of 8000+ hours, significantly reducing overall power consumption and maintenance frequency compared to traditional halogen lamp 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
The solution enables stable simulation of D65 daylight with a metamerism index less than 0.25, achieving CLASS A CIE standard, with significant power savings and an extended lifespan of up to 8,000 hours compared to traditional halogen tungsten lamps.
Implementation Method 1
Each of the lamp beads comprises a purple LED chip, a blue LED chip and hybrid fluorescent powder
Implementation Method 2
Each of the lamp beads comprises a purple LED chip, a blue LED chip
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A color matching observation box for an LED standard light source comprises a box body, wherein an opening is formed in one side of the box body, an observation chamber is formed by the internal space of the box body, and a standard light source is disposed at the top of the observation chamber and comprises multiple lamp beads; and each of the lamp beads comprises a purple LED chip with a wavelength of 410 nm-430 nm, a blue LED chip with a wavelength of 440 nm-460 nm, and hybrid fluorescent powder. The color matching observation box may be provided with two groups of fluorescent lamps and one group of UV lamps, wherein the UV lamps can be used separately or in combination with other light sources.