UV Patch Sheet With Photochromic Layer for Real-Time Skin Exposure
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Solution Overview
Problem
Existing technologies fail to provide real-time recognition of ultraviolet exposure to the skin and the effectiveness of ultraviolet protection cosmetics, making it difficult to recognize skin damage until inflammation occurs, and there is no effective method to accurately assess ultraviolet protection performance.
Innovation Solution
A skin-attaching sheet with a color-changeable layer that changes color visibly upon ultraviolet exposure, allowing real-time detection of ultraviolet rays and evaluation of protection performance by applying a liquid substance and using a photochromic compound to create a noticeable color difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If existing ultraviolet protection technologies are used, then ultraviolet protection is provided, but real-time recognition of ultraviolet exposure and protection effectiveness is not achieved
Solution Approach 1:
The patent applies photochromic compounds that change color in response to ultraviolet exposure. The color-changeable layer transitions from a first color to a second color when exposed to ultraviolet rays, providing visual feedback about UV exposure levels and protection effectiveness in real-time.
Solution Approach 2:
The invention implements a feedback mechanism where the color change of the photochromic compound provides immediate visual information about ultraviolet exposure. This allows users to assess whether their skin is adequately protected and take preventive measures before skin damage occurs.
2Difficulty of detecting and measuring
If photochromic compounds are applied to skin, then ultraviolet exposure detection is enabled, but the compounds may cause skin irritation or allergic reactions
Solution Approach 1:
The patent uses a sheet as an intermediary carrier that contains the photochromic compound. The sheet is attached to the skin surface, separating the photochromic compound from direct skin contact while still allowing UV detection. This mediator approach reduces potential skin irritation while maintaining detection functionality.
Solution Approach 2:
The invention employs a thin sheet structure that can be attached to the skin surface. This flexible film provides a physical barrier between the photochromic compound and the skin, reducing direct contact and potential irritation while enabling UV exposure detection through the sheet material.
3Measurement precision
If a color-changeable layer is attached to skin, then real-time ultraviolet detection is achieved, but the attachment may cause skin discomfort or allergic reactions
Solution Approach 1:
The patent uses a thin, flexible sheet that can be comfortably attached to the skin surface. The sheet's flexibility and thin profile minimize discomfort while maintaining the functionality of the color-changeable layer for accurate real-time ultraviolet detection.
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 real-time detection of ultraviolet exposure and evaluation of protection performance, allowing users to take preventive measures against skin damage by visibly changing color in response to UV exposure.
Implementation Method 1
a color-changeable layer that changes color through exposure to ultraviolet rays
Data Source
AI summary
A skin-attaching sheet including an attaching portion configured for attaching to skin. The attaching portion includes a color-changeable layer that changes color following exposure to ultraviolet rays, and the attaching portion has a color difference (ΔE*ab) in an L*a*b* color system between before exposure and 10 seconds after exposure of 5 or more and 300 or less in a standard exposure test in which the attaching portion is exposed to ultraviolet rays in a moist state.