Cosmetic Light Device Distance Sensor Feedback Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cosmetic light treatment devices for private use lack effective control over light intensity, leading to potential damage from excessive exposure and inadequate coverage, with existing solutions either being complex, expensive, or raising hygiene concerns.
Innovation Solution
A device with a distance sensor that adjusts the emission power of light sources in real-time to maintain homogeneous luminous intensity on the skin, using a microcontroller to control the power based on measured distance, ensuring optimal treatment while preventing over-exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the distance between the light source and treatment surface is not controlled, then the device is simple to operate, but the light intensity becomes non-homogeneous and may cause damage
Solution Approach 1:
The patent implements a feedback control system where a distance sensor continuously measures the distance between the light source and treatment surface, and a microcontroller adjusts the light emission power accordingly to maintain homogeneous intensity. This closed-loop feedback mechanism resolves the contradiction by automatically compensating for distance variations without requiring complex manual control mechanisms.
Solution Approach 2:
The patent replaces mechanical distance control mechanisms (such as fixed positioning structures or manual adjustment devices) with an electronic control system comprising a distance sensor and microcontroller. This substitution eliminates complex mechanical components while achieving precise light intensity control through electronic feedback.
2Area of stationary object
If multiple LEDs are used to cover the treatment area, then the coverage is improved, but the device complexity and cost increase
Solution Approach 1:
The patent changes the parameters of individual LEDs (emission power, wavelength, or pulse duration) controlled by a microcontroller to achieve uniform illumination across the treatment area. This approach allows using fewer LEDs compared to traditional arrays while maintaining coverage through intelligent parameter modulation, thereby reducing device complexity.
3Reliability
If the light intensity is increased for efficacious treatment, then the treatment effectiveness is improved, but the risk of skin damage increases
Solution Approach 1:
The patent uses a feedback control system where the microcontroller continuously monitors treatment parameters and adjusts light intensity in real-time based on distance measurements and pre-programmed safety thresholds. This ensures the light intensity remains within the optimal therapeutic range, maximizing treatment effectiveness while preventing skin damage through automatic intensity regulation.
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 consistent and safe light intensity across the treatment area, maintaining homogeneity within +/-10% and preventing damage, while being compact and cost-effective.
Implementation Method 1
at least one distance sensor for measuring a distance between the reference surface and a cosmetic treatment area of the skin
Implementation Method 2
at least one light emission source
Implementation Method 3
exposing an area of skin to light
Data Source
AI summary
The invention relates to a device for cosmetic treatment by light comprising:at least one light emission source (10);a reference surface (5) fixed with respect to said light emission source,at least one distance sensor (20) for measuring a distance between the reference surface (5) and a cosmetic treatment area (30) of the skin,a microcontroller (3) suitable for controlling the emission power of each light source (10), in which the emission power of each light source is slaved to the distance measured by the sensor.