Skin Treatment Current Control With Feedback for User Comfort

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing skin treatment devices experience user discomfort due to rapid changes in skin resistance, leading to transient power differentials and sensations such as stinging or prickling, which traditional constant current sources fail to regulate effectively.

Innovation Solution

A continuously acting power modulation and control system using a non-linear current control device with feedback loops to adjust power output based on skin resistance changes, incorporating sensors for additional feedback, ensuring a more constant power delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional constant current sources are used, then current delivery is maintained, but transient power differentials cause user discomfort due to rapid skin resistance changes

Engineering Contradiction:

Improvecurrent delivery stabilityVSAvoiduser discomfort from transient power states

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a feedback control system that continuously monitors skin resistance changes and dynamically adjusts the current output to maintain constant power delivery. This feedback mechanism detects transient states and responds by modulating the current to eliminate harmful power differentials while preserving stable treatment delivery.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system transitions from a static constant current source to a dynamic power delivery system that continuously adapts to changing skin resistance conditions. The controller dynamically adjusts current levels in real-time to maintain constant power, enabling the system to respond to rapid resistance changes without causing user discomfort.

Inventive Principle:

Principle #15Dynamics

2Object-affected harmful factors

If power output is reduced to eliminate transient states, then user comfort improves, but treatment efficacy decreases

Engineering Contradiction:

Improveuser comfortVSAvoidtreatment power delivery

Core Design Contradiction:

Object-affected harmful factorsVSPower

Solution Approach 1:

The feedback control system allows the device to operate at high power levels by continuously monitoring and adjusting to maintain constant power delivery. This enables the system to deliver effective treatment power while eliminating harmful transient states, resolving the trade-off between comfort and efficacy.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system changes the operating parameters dynamically by adjusting current levels in response to skin resistance changes. This parameter modulation maintains constant power delivery across varying resistance conditions, allowing high effective power while preventing uncomfortable transient states.

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If constant current is maintained during rapid resistance changes, then current stability is preserved, but large voltage swings create harmful transient power differentials

Engineering Contradiction:

Improvecurrent stabilityVSAvoidtransient power differentials

Core Design Contradiction:

Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The feedback control system detects voltage swings caused by rapid resistance changes and responds by adjusting current output to maintain constant power. This feedback mechanism prevents harmful transient power differentials while preserving stable treatment delivery through dynamic parameter adjustment.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system anticipates and counteracts harmful transient power differentials by implementing preemptive control adjustments. When resistance changes are detected, the controller预先 adjusts current levels to prevent the formation of harmful power swings, eliminating user discomfort before it occurs.

Inventive Principle:

Principle #9Preliminary anti-action

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 system significantly reduces transient power states, maintaining higher power levels across varying resistances, thereby enhancing user comfort and treatment efficacy.

Implementation Method 1

a voltage or current supply configured to generate the current signal for application via the one or more electrodes, where power is output to the skin surface

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

a monitor circuit configured to generate feedback responsive to changes in the current signal or the power output to the skin surface, based at least in part on a voltage sensed at, proximate or across one or more of the electrodes

Methodology Applied

Scientific EffectVoltage detection: Electric Field

Data Source

PatentUS12440673B2Current control system for skin treatment device

Publication Date: 2025.10.14 NSE PRODUCTS INC

AI summary

A skin treatment device has one or more electrodes adapted for application of a current to a skin surface of a subject, a voltage or current supply configured to generate the current, and a controller configured to modulate the power output to the skin surface. The controller includes a monitor circuit configured to generate feedback responsive to a change in the power output to the skin surface, based at least in part on the current, and a control circuit configured to modulate the current, based on the feedback.