Inductive Skin Heating With Conductive Material to Avoid Needle Burns

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Solution Overview

Problem

Conventional high-frequency skin cosmetic methods using needles to apply electrical energy cause skin heating and side effects like redness or burns due to heat generation at the needle site.

Innovation Solution

A non-invasive system that injects a conductive material, such as gold nanoparticles in hydrogel, into the skin, which generates heat through an alternative magnetic field induced by a high-frequency treatment device, converting electrical energy into thermal energy without needles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a needle electrode is inserted into the skin to apply high-frequency electrical energy, then skin treatment effectiveness is improved, but heat generation at the needle site causes skin burns and redness

Engineering Contradiction:
Improveskin treatment effectivenessVSAvoidskin burns and redness
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a conductive material as an intermediary substance injected into the skin before applying high-frequency energy. This conductive material serves as a mediator that enables effective energy transmission while distributing heat generation throughout the material volume rather than concentrating it at a needle tip, thereby maintaining treatment effectiveness while preventing localized skin burns and redness

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the mechanical needle insertion system with a non-invasive approach. Instead of using a physical needle electrode that mechanically penetrates the skin, the system uses an injected conductive material combined with electromagnetic field induction, eliminating the mechanical penetration step that causes localized heat concentration and skin damage

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If high-frequency electrical energy is applied directly through a needle, then collagen and elastin regeneration is stimulated, but the needle heats up causing side effects

Engineering Contradiction:
Improvecollagen and elastin regenerationVSAvoidneedle temperature
Core Design Contradiction:
ReliabilityVSTemperature

Solution Approach 1:

The conductive material acts as an intermediary that separates the energy source from the skin tissue. The high-frequency energy is induced in the conductive material rather than being delivered through a heated needle, allowing collagen and elastin regeneration to occur while the conductive material absorbs and distributes the thermal energy, preventing excessive needle temperature and associated side effects

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the physical state and distribution of the conductive medium from a solid needle to an injected material that can be dispersed throughout the treatment area. This parameter change allows the same thermal energy to be distributed over a larger volume, reducing the temperature at any single point while maintaining the overall heating effect needed for collagen and elastin regeneration

Inventive Principle:
Principle #35Parameter changes

3Use of energy by moving object

If a needle is inserted into the skin for treatment, then direct electrical energy application is achieved, but skin invasion and potential damage occur

Engineering Contradiction:
Improvedirect electrical energy applicationVSAvoidskin invasion and damage
Core Design Contradiction:
Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical needle penetration system with an electromagnetic induction system. Instead of mechanically inserting a needle to deliver electrical energy, the system injects a conductive material and uses electromagnetic fields to induce currents within that material, achieving direct energy application to skin targets without mechanical invasion or associated tissue damage

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The conductive material serves as an intermediary that enables electrical energy application without direct needle contact. The material is injected into the skin and acts as a temporary conductor that allows electromagnetic energy to be delivered to the target tissue, eliminating the need for invasive needle insertion while maintaining effective energy transfer

Inventive Principle:
Principle #24Intermediary (Mediator)

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 effectively treats skin issues by regenerating collagen and elastin, promoting tissue regeneration, and avoiding skin burns or redness, while allowing targeted treatment of specific areas.

Implementation Method 1

a high-frequency treatment device configured to generate a high-frequency current to transmit an alternative magnetic field to the conductive material

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

the conductive material may convert a current induced by the alternative magnetic field into heat through an eddy current loss and a hysteresis loss

Methodology Applied
Scientific EffectEddy current loss: Eddy Currents

Implementation Method 3

the conductive material may convert a current induced by the alternative magnetic field into heat through an eddy current loss and a hysteresis loss

Methodology Applied
Scientific EffectHysteresis loss: Hysteresis

Implementation Method 4

the conductive material generates heat due to the alternative magnetic field generated by the coil part

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Data Source

PatentEP4678225A1Non-invasive high-frequency treatment system
Publication Date: 2026.01.14 FOUR S TECH CO LTD
  • EP4678225A1 patent drawingFigure 1
  • EP4678225A1 patent drawingFigure 2
  • EP4678225A1 patent drawingFigure 3

AI summary

A non-invasive high-frequency treatment system is disclosed. The non-invasive high-frequency treatment system according to one aspect of the present invention includes a conductive material injected into a skin to be treated, and a high-frequency treatment device configured to generate a high-frequency current to transmit an alternative magnetic field to the conductive material, wherein the high-frequency treatment device includes a high-frequency generator configured to output the high-frequency current, a coil part configured to convert the high-frequency current output from the high-frequency generator into the alternative magnetic field, and a controller configured to control the high-frequency generator, and the conductive material generates heat due to the alternative magnetic field generated by the coil part.