Quantum Dot Phototherapy Mask for Adjustable Wavelengths
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Solution Overview
Problem
Current phototherapy devices are limited by fixed wavelengths, varying distance from the skin, variability in peak wavelength, cost, and performance trade-offs between clinical and home-use devices, which restrict their effectiveness and convenience.
Innovation Solution
A phototherapy mask with a flexible LED array and a replaceable quantum dot-containing film that down-converts primary light to tailored secondary light, allowing for adjustable wavelengths and consistent light distribution, while being portable and cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional phototherapy devices use fixed wavelength light sources, then the device structure is simple, but the treatment versatility is limited
Solution Approach 1:
The patent uses quantum dot particles with varying sizes to change the emission wavelength parameter. By controlling the quantum dot size (2-50 nm range), the device can emit different wavelengths (400-700 nm) to treat different skin conditions, achieving treatment versatility without complex mechanical adjustments
Solution Approach 2:
The quantum dot particles act as an intermediary between the LED light source and the skin. The LEDs emit blue light (430-480 nm) which excites the quantum dots, causing them to emit therapeutic wavelengths in the 400-700 nm range, thus mediating the light transformation in a simple device structure
2Adaptability or versatility
If phototherapy devices use multiple wavelength sources to treat different conditions, then treatment versatility improves, but device complexity and cost increase
Solution Approach 1:
Instead of using multiple LED sources with different wavelengths, the patent changes the quantum dot particle size parameter to achieve different emission wavelengths from a single LED source, significantly reducing manufacturing complexity and cost
Solution Approach 2:
A single LED source combined with quantum dots of varying sizes can perform multiple therapeutic functions by treating different skin conditions with different wavelengths, making the device universal and cost-effective
3Adaptability or versatility
If phototherapy devices use broad-band UV light, then the treatment coverage is comprehensive, but the risk of skin damage increases
Solution Approach 1:
The patent applies local quality by using quantum dots with specific size ranges to emit light at specific wavelength ranges needed for different skin conditions, rather than using broad-band UV light that exposes the skin to unnecessary harmful wavelengths
Solution Approach 2:
The patent converts potentially harmful broad-band UV light into beneficial narrow-band visible light (400-700 nm) through quantum dot down-conversion, maintaining therapeutic effectiveness while eliminating harmful UV components
4Measurement precision
If phototherapy devices are designed for clinical use with precise wavelength control, then treatment precision is high, but the device cost and complexity increase making them unsuitable for home use
Solution Approach 1:
The patent achieves precise wavelength control by controlling the quantum dot particle size parameter during manufacturing, eliminating the need for complex mechanical or electronic wavelength adjustment mechanisms required in clinical devices
Solution Approach 2:
The patent replaces mechanical wavelength adjustment systems with a quantum dot-based optical system where wavelength is determined by particle size, simplifying the device for home use while maintaining treatment precision
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 provides flexible and adjustable light therapy that is both clinically effective and affordable for home use, reducing the risk of skin damage and improving treatment convenience.
Implementation Method 1
The quantum dots in the QD-containing film are selected to photo-luminesce at one or more particular wavelengths in response to photoexcitation by the light emitted from the LEDs
Data Source
AI summary
A phototherapy device comprises a face mask having a rigid (or semi-rigid) shell contoured to the human face. A flexible array of LEDs is affixed to the inner surface of the mask. A flexible, quantum dot-containing film is situated over the flexible array of LEDs. The quantum dots in the QD-containing film are selected to photo-luminesce at one or more particular wavelengths in response to photoexcitation by the light emitted from the LEDs. The LEDs emit “primary light” and the quantum dots down-convert at least a portion of the primary light to “secondary light.” The flexible, quantum dot-containing film may be interchangeable such that the wavelength(s) of the secondary light may be tailored to various phototherapy treatment regimes.