Cosmetic Ink Applicator Using UV Fluorescence for Skin Alignment
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Solution Overview
Problem
Conventional cosmetic ink application devices struggle with precise alignment and dynamic tracking of skin regions for makeup application, especially on the face where small displacements can significantly affect the outcome.
Innovation Solution
A cosmetic ink application device that uses a light source to irradiate the skin with ultraviolet light, creating a fluorescence marker region detectable by an optical sensor. This allows the device to precisely align and track the skin region for accurate ink application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional printing devices are used for makeup application, then the device can print images on skin, but the alignment precision is insufficient for facial features where even 1mm displacement causes poor results
Solution Approach 1:
The patent applies preliminary action by pre-defining marker regions on the face before makeup application. These markers are detected by the device to establish precise reference points for alignment, eliminating the need for manual alignment during the actual makeup process. The controller uses these pre-established markers to automatically determine the correct positioning of the applicator relative to facial features.
Solution Approach 2:
The patent introduces markers as intermediary elements between the printing device and the skin. These markers serve as mediators that the device can detect and use for precise alignment. The markers translate the complex task of manual facial feature alignment into a simpler task of detecting known marker positions, thereby improving alignment precision without complicating the operation.
2Adaptability or versatility
If the device covers a portion of the body for printing, then it can perform makeup application, but it cannot automatically align or correct position with respect to dynamically changing skin shape and stiffness
Solution Approach 1:
The patent implements feedback by continuously detecting the positions of markers on the skin during the makeup application process. The controller receives real-time information about marker positions and automatically adjusts the applicator's position to maintain correct alignment. This closed-loop feedback system enables the device to adapt to dynamic skin changes such as movement, shape changes, and stiffness variations, achieving both adaptability and automation.
3Productivity
If manual makeup application is performed by looking at a mirror, then the user can apply makeup, but the result has poor reproducibility and takes a long time
Solution Approach 1:
The patent replaces the manual mechanical process of looking at a mirror and manually applying makeup with an automated optical-electronic system. The device uses optical sensors to detect markers, electronically processes the position information, and automatically controls the applicator's movement. This substitution eliminates the variability and time consumption associated with manual application while ensuring consistent, reproducible results through automated precision control.
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 device achieves precise and automatic application of cosmetic ink by using the fluorescence marker region for alignment and tracking, ensuring accurate placement even on dynamically changing skin shapes and stiffness.
Implementation Method 1
a light source for irradiating human skin with ultraviolet light; an optical sensor for detecting intensities of fluorescence in a ultraviolet range and/or a visible light range emitted from the skin in response to the irradiation of the ultraviolet light
Data Source
AI summary
The present invention relates to a cosmetic ink application device which functions by producing a region as an alignment marker on human skin and detecting the region to align an applicator with the skin, and a method thereof. A cosmetic ink application device according to the present invention comprises: a light source for irradiating human skin with ultraviolet light; an optical sensor for detecting intensities of fluorescence in a ultraviolet range and/or a visible light range emitted from the skin in response to the irradiation of the ultraviolet light; an applicator for applying a cosmetic ink to the skin; a head portion for holding the light source, the optical sensor, and the applicator; and a controller, wherein the controller defines a region on the skin, which emits fluorescence having an intensity different from fluorescence emitted from other regions of the skin when irradiated with the ultraviolet light, as a marker region, wherein the controller determines a position of the ink application based on the marker region, and wherein the controller causes the applicator to apply the ink on a predetermined portion of the skin.