Multi-Wavelength LED Lighting for White Light and Vitamin D
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Solution Overview
Problem
Conventional lighting devices using LEDs are limited to visible light and do not provide wavelengths beneficial for human health, such as those that aid in vitamin D synthesis, pathogen sterilization, or cell activation, which are present in natural sunlight.
Innovation Solution
A lighting apparatus incorporating LEDs that emit ultraviolet light and use wavelength converters to produce white light, along with specific wavelength ranges to stimulate vitamin D production, sterilize pathogens, and activate cell-activating substances like nitric oxide, utilizing phosphors or quantum dots for efficient wavelength conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional lighting systems emit only visible light, then the lighting function is simple and energy-efficient, but the system cannot provide light in beneficial wavelength ranges such as ultraviolet and infrared for vitamin D production and cell activation
Solution Approach 1:
The patent combines multiple LED chips with different peak wavelengths (violet 405nm, blue 450nm, cyan 495nm, green 530nm, yellow-green 560nm, red 630nm) into a single lighting module. This merging approach enables the system to emit light across the entire visible spectrum plus ultraviolet and infrared regions, providing comprehensive wavelength coverage for various health benefits including vitamin D production, sterilization, and cell activation, while maintaining a unified device structure
Solution Approach 2:
The lighting system is designed to perform multiple functions simultaneously: illumination, vitamin D production (via UVB), sterilization (via UV-C and violet light), and cell activation (via red and infrared light). By integrating LEDs across the electromagnetic spectrum into one system, the device achieves multi-functionality without requiring separate lighting systems for each purpose
2Adaptability or versatility
If LED lighting systems use multiple light emitting diodes with different wavelengths, then the spectrum coverage is improved, but the device complexity increases
Solution Approach 1:
The patent divides the lighting system into distinct functional modules, each containing LEDs with specific peak wavelengths tailored for particular purposes: violet LEDs (405nm) for sterilization, UVB LEDs for vitamin D production, visible spectrum LEDs for illumination, and red/infrared LEDs for cell activation. This segmentation allows each module to be optimized independently while contributing to the overall spectral coverage
Solution Approach 2:
The patent employs composite LED structures combining multiple semiconductor materials with different bandgaps to achieve specific peak wavelengths. By using composite material systems (such as AlGaInP for red/yellow, InGaN for blue/green, and AlGaAs for infrared), the design achieves broad spectrum coverage through material science rather than simply assembling discrete LED components
3Adaptability or versatility
If the lighting system emits ultraviolet and infrared light, then additional health functions are provided, but the risk of harmful blue light exposure increases
Solution Approach 1:
The patent applies local quality control by emitting blue light (450nm) only at specific intensity levels appropriate for particular applications, while simultaneously providing other wavelength ranges at optimized intensities. The system tailors the spectral distribution to local needs: using blue light for illumination where required, while compensating with enhanced UVB for vitamin D, red for cell activation, and infrared for deep tissue penetration, thereby balancing blue light exposure against overall health benefits
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 apparatus provides beneficial light similar to sunlight, enhancing vitamin D synthesis, pathogen sterilization, and cell activation, while reducing health hazards associated with conventional LED lighting.
Implementation Method 1
a wavelength converter for converting a wavelength of light emitted from the light emitting diode
Implementation Method 2
a light emitting diode emitting light having a peak wavelength in a range of about 286 nm to about 304 nm
Data Source
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Figure 3
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AI summary
A lighting device according to one embodiment comprises: a first light emitting diode having a peak wavelength within a range of approximately 300 nm to approximately 470 nm; a second light emitting diode for emitting ultraviolet rays having a peak wavelength within a range of approximately 286 nm to approximately 304 nm; and a wavelength converter for converting a wavelength of light emitted from the first light emitting diode, and emits white light and, further, emits the light suitable for generating vitamin D and the light suitable for generating a cellular active substance, wherein the white light is implemented by means of the first light emitting diode and the wavelength converter.