Transdermal Electrical Stimulation System for Cognitive State Modulation

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Solution Overview

Problem

Existing transdermal electrical stimulation (TES) systems are inadequate in safely and robustly inducing cognitive states in human subjects, often causing skin irritation and pain, and lack reliability in achieving desired cognitive effects.

Innovation Solution

The use of specific electrode configurations and control modules that deliver biphasic electrical stimulation with parameters such as frequency above 100 Hz, intensity above 2 mA, and a DC offset, combined with capacitive discharge to minimize pain and discomfort, targeting nerves like the trigeminal, facial, and cervical plexus to induce desired cognitive states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If transdermal electrical stimulation is applied to induce cognitive states, then cognitive effects are achieved, but skin irritation and pain occur

Engineering Contradiction:

Improvereliability of inducing cognitive effectsVSAvoidskin irritation and pain

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies periodic pulsed electrical stimulation instead of continuous stimulation. The controller delivers electrical pulses at specific frequencies (e.g., 100 Hz or greater) with controlled duty cycles, allowing neural tissue to respond cognitively while providing rest periods that prevent skin irritation and pain accumulation.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent utilizes biphasic waveforms with DC offset and dynamically adjusts stimulation parameters including frequency, amplitude, and pulse width. By changing these parameters periodically and adapting them based on tissue response, the system achieves reliable cognitive effects while staying below pain thresholds through capacitive discharge mechanisms.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If electrical stimulation parameters are increased to robustly induce cognitive states, then cognitive effect reliability improves, but pain and discomfort increase

Engineering Contradiction:

Improverobustness of cognitive state inductionVSAvoidpain and discomfort

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system dynamically adjusts stimulation parameters in real-time based on tissue impedance measurements and user feedback. The controller modulates frequency, amplitude, and pulse duration to maintain cognitive effectiveness while adapting to changing skin conditions, preventing pain threshold exceedance even during prolonged use.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces capacitive discharge as an intermediary mechanism between the electrical stimulus and neural tissue. The capacitive elements store and release energy in controlled bursts, delivering robust cognitive stimulation while the discharge phase dissipates excess energy that would otherwise cause pain and discomfort.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If high frequency and intensity stimulation is applied, then cognitive effects are enhanced, but skin irritation occurs

Engineering Contradiction:

Improveefficacy of cognitive state inductionVSAvoidskin irritation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system employs periodic pulsed stimulation at frequencies of 100 Hz or greater with controlled duty cycles. This periodic delivery allows high-frequency cognitive enhancement while the inter-pulse intervals prevent cumulative skin irritation by allowing tissue recovery between stimulation bursts.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent utilizes biphasic waveforms with DC offset where parameters such as frequency, amplitude, and pulse width are dynamically changed during stimulation. These parameter variations maintain high cognitive efficacy through frequency modulation while amplitude modulation keeps instantaneous intensity below irritation thresholds.

Inventive Principle:

Principle #35Parameter changes

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 described methods and apparatuses effectively induce cognitive effects such as enhanced focus, alertness, relaxation, and calmness by minimizing skin irritation and pain, allowing for reproducible and comfortable neuromodulation.

Implementation Method 1

transdermal electrical stimulation (TES) methods, apparatuses and systems, including applicators, for inducing cognitive effects

Methodology Applied

Scientific EffectElectrical stimulation: Conduction (electrical)

Implementation Method 2

capacitive discharge to minimize pain and discomfort

Methodology Applied

Scientific EffectCapacitive discharge: Capacitance

Data Source

PatentUS20250108215A1Apparatuses and methods for transdermal electrical stimulation of nerves to modify or induce a cognitive state

Publication Date: 2025.04.03 THYNC GLOBAL INC

AI summary

Portable transdermal electrical stimulation (TES) applicators for modifying a subject's cognitive state by applying stimulation to the subject's skin. One or more electrode may be on the subject's mastoid, and/or on or near the back of the subject's neck. The portable applicators are configured and adapted to be lightweight and may be wearable, and to deliver a high-intensity TES able to evoke or enhance a predetermined cognitive effect to stimulate either the trigeminal, facial and/or cervical plexus. These TES applicators may include a pair of electrodes and a TES control module comprising a processor, a timer and a waveform generator.