Nanocrystal-Loaded Host Medium for Spectral Selectivity
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Solution Overview
Problem
Current light therapy methods, such as those using lasers and LEDs, lack adaptability and spectral selectivity, making it difficult to provide conformal and effective distributed optical radiation sources for therapeutic treatments, which require specific wavelengths and intensities for optimal cellular regeneration and tissue repair.
Innovation Solution
A method utilizing a passive host medium containing nanocrystals that emit electromagnetic radiation responsive to an external excitation source, allowing for shape-adaptable and spectral-selective optical radiation sources, capable of emitting radiation in the UV to mid-infrared range, by incorporating nanocrystals of varying sizes to control the spectral output and conform to different body parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If lasers and LEDs are used as light sources, then high efficiency is achieved, but adaptability and spectral selectivity are limited
Solution Approach 1:
The patent introduces a down-conversion layer containing phosphors or fluorescent materials as an intermediary between the LED light source and the treatment area. This layer converts the high-energy blue LED light into multiple lower-energy wavelengths, achieving spectral selectivity while maintaining the efficiency advantage of LED sources. The down-conversion layer acts as a mediator that transforms the light characteristics without requiring multiple separate light sources.
Solution Approach 2:
The patent utilizes the principle of parameter changes by selecting phosphors with specific emission characteristics and arranging them in layers with varying thicknesses and compositions. By changing the parameters of the phosphor materials (emission wavelengths, quantum efficiency, absorption coefficients), the system achieves different spectral outputs from a single LED source, enabling spectral selectivity while maintaining high efficiency.
2Manufacturing precision
If multiple separate light sources are used to achieve spectral selectivity, then wavelength specificity is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple wavelength-generating functions into a single integrated LED module with a down-conversion layer. Instead of using separate LEDs for each wavelength, the invention combines multiple phosphor materials in one layer structure that simultaneously generates multiple therapeutic wavelengths from a single blue LED source, thereby reducing device complexity while maintaining wavelength specificity.
Solution Approach 2:
The down-conversion layer serves multiple functions simultaneously: it converts blue light to red light, generates other therapeutic wavelengths, and can be adjusted to provide different spectral compositions. This multi-functionality eliminates the need for multiple separate light sources and control systems, simplifying the overall device while achieving precise wavelength control.
3Ease of manufacture
If a fixed light source geometry is used, then manufacturing simplicity is maintained, but adaptability to different body parts is reduced
Solution Approach 1:
The patent employs a flexible or adjustable mounting structure that allows the LED module to be dynamically positioned and shaped to conform to different body contours. The down-conversion layer can be applied to flexible substrates or formed in various geometric configurations, enabling the device to adapt to different treatment areas while maintaining straightforward manufacturing processes for each configuration.
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
Enables targeted and adaptable light therapy by providing a softer, broader range of wavelengths for therapeutic treatment, enhancing tissue responses and healing processes without causing tissue damage, and accommodating various body parts with geometrically configurable light-source mediums.
Implementation Method 1
nanocrystals which when irradiated by an external excitation source responsively emit radiation in the desired wavelength region
Implementation Method 2
the spectral output of the distributed optical radiation source is controlled by the nanocrystal size distribution that determines the spectral output of fluorescence radiation originating from these nanocrystals
Data Source
AI summary
A method of making shape-adaptable and spectral-selective distributed optical radiation sources, in the wavelength range between UV and mid-infrared, for therapeutic treatment using passive host medium containing nanocrystals is disclosed. The spectral output of the distributed optical radiation source is controlled by the nanocrystal size distribution that determines the spectral output of fluorescence radiation originating from these nanocrystals from within the said host medium, which contains the said nanocrystals, under excitation by an external source. The size of nanocrystals, or the size distribution of nanocrystals, incorporated in the host medium is selected based on the radiation spectral output required for therapeutic requirements. The passive host medium, incorporating the said nanocrystals, is made of adaptable, geometrically configurable, material that conforms to any desired shape.