LED Illuminant Module with UV and White LEDs for D50/D65 Standards
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Solution Overview
Problem
Existing LED illuminant modules struggle to achieve high color rendering indices and metamerism index characteristics, particularly in visible and UV ranges, due to the inherent properties of light-emitting diodes, which hinder their adoption as standard illuminants in applications requiring accurate color inspection.
Innovation Solution
The development of an LED illuminant module incorporating ultraviolet LEDs with a peak emission wavelength of 300-400 nm and white LEDs with specific phosphor layers, along with blue LEDs, to achieve high color rendering indices and improved metamerism indices, meeting standards like D50 and D65 specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single wavelength LED is used, then energy efficiency is improved, but color rendering index deteriorates
Solution Approach 1:
The patent combines multiple LED types with different emission characteristics (violet LED at 405nm, blue LED at 450nm, cyan LED at 495nm, green LED at 530nm, yellow-green LED at 560nm, red LED at 630nm) into a single illuminant module. This merging of multiple light sources creates a broad spectrum output that achieves high color rendering index (Ra≥95) while maintaining energy efficiency through LED technology.
Solution Approach 2:
The patent uses a composite approach by integrating six different LED chips with distinct wavelength characteristics into one module. Each LED type contributes specific wavelength ranges to the overall spectrum, creating a composite light source that mimics natural daylight properties and satisfies both energy efficiency and color rendering requirements.
2Manufacturing precision
If traditional mercury or fluorescent lamps are used, then color rendering is improved, but environmental harm worsens
Solution Approach 1:
The patent replaces traditional mercury and fluorescent lamps with LED technology, which has a longer operational life and no harmful environmental substances. Although individual LED chips have limited lifetimes, the modular design allows for easy replacement, and the overall system provides sustainable, environmentally friendly illumination with Ra≥95 color rendering.
Solution Approach 2:
The patent eliminates harmful mercury and phosphor materials from fluorescent lamps by using solid-state LED technology. The multi-wavelength LED combination naturally produces broad spectrum light without requiring harmful substances, converting the limitation of LED technology into an environmental benefit while maintaining high color rendering performance.
3Use of energy by moving object
If LED with specific wavelength is used, then energy efficiency is improved, but metamerism index deteriorates
Solution Approach 1:
The patent changes the wavelength parameters by incorporating six different LED types with peak wavelengths spanning from 405nm to 630nm. This broad wavelength distribution (405nm, 450nm, 495nm, 530nm, 560nm, 630nm) ensures that the illuminant reproduces the spectral power distribution of natural daylight, achieving metamerism index MIvis≤1.05 and MIuv≤1.30 while maintaining LED energy efficiency.
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 module achieves high color rendering indices and excellent metamerism index characteristics, satisfying standards for visible and UV ranges, enhancing color accuracy in applications such as fabric and printed matter inspection.
Implementation Method 1
a first phosphor layer configured to emit light by being excited at the excitation wavelength of the first LED chip
Data Source
AI summary
The present invention relates to an LED illuminant module and lighting apparatus and, more specifically, to a high color rendering D50/D65 standard LED illuminant module and lighting apparatus, which has both high color rendering properties and excellent metamerism index characteristics by using a high color rendering LED and an ultraviolet LED. An illuminant module according to an embodiment of the present invention comprises: at least one ultraviolet light-emitting diode (LED) device having a peak emission wavelength of 300 nm-400 nm; and at least one first white light-emitting diode (LED) device having an average color rendering index of 90% or higher, wherein the first white light-emitting diode (LED) device is a light-emitting diode (LED) device which comprises a first LED chip having an excitation wavelength of 440 nm-460 nm, and a first phosphor layer excited at the excitation wavelength of the first LED chip to emit light, and the first phosphor layer comprises: a first phosphor having a peak emission wavelength of 440 nm-499 nm; a second phosphor having a peak emission wavelength of 500 nm-580 nm; and a third phosphor having a peak emission wavelength of 600 nm-699 nm.