Integrated Transdermal Stimulation with Flexible Circuitry
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Solution Overview
Problem
Existing non-invasive neuromodulation systems for transcranial and transdermal electrical stimulation (TES) lack miniaturization, comfort, and convenience, with separate neurostimulation modules and electrodes that are not well-suited for wearable, on-the-go use, and require cumbersome hardware and batteries.
Innovation Solution
Development of integrated TES neuromodulation apparatuses with flexible circuitry that combine electrodes and neuromodulation components into a single, lightweight, low-profile device that can be powered by a smartphone or other portable electronics, eliminating the need for a separate power source and allowing for comfortable wear on the head or neck.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate neurostimulation modules and electrodes are used, then functional reliability is improved, but device complexity and bulk increase
Solution Approach 1:
The patent combines separate neurostimulation modules and electrodes into a single integrated TES device. The electrode array and neuromodulation circuitry are merged onto one flexible substrate, eliminating the need for separate components and reducing overall device complexity while maintaining functional reliability through integrated design.
Solution Approach 2:
The integrated device serves multiple functions within a single unit: it provides electrical stimulation through the electrode array, houses neuromodulation circuitry for signal generation and control, and incorporates flexible substrate for conformal attachment. This multi-functionality reduces the number of separate components needed.
2Device complexity
If integrated neuromodulation components are combined into single device, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses a flexible substrate as the base for integrating electrodes and neuromodulation components. This flexible film approach allows for lower-precision manufacturing compared to rigid substrates, as it can accommodate variations in component placement and provides tolerance for manufacturing imperfections while maintaining device functionality.
Solution Approach 2:
The integrated device is constructed by sequentially forming different functional layers on the flexible substrate: conductive layers for electrodes, insulating layers, and neuromodulation circuitry. This segmented, layer-by-layer manufacturing process allows each layer to be optimized independently, reducing the cumulative precision requirements.
3Ease of operation
If flexible substrate is used for electrode integration, then ease of operation and comfort are improved, but structural strength decreases
Solution Approach 1:
The patent employs a composite structure where a flexible substrate is combined with conductive materials, insulating materials, and protective coatings to form the integrated TES device. This composite construction provides both the flexibility needed for conformal attachment and comfort, and sufficient structural strength to maintain electrode integrity and electrical connections during use.
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 integrated TES systems provide a more comfortable, convenient, and cost-effective means of delivering neuromodulation, enabling reliable and durable electrical contact for cognitive state modulation without the bulk of separate hardware components, while reducing environmental impact through minimized battery use.
Implementation Method 1
an first electrode region (including first electrically active region) present at one end, while a second electrode region (including a second electrically active region) may be present at the opposite end; the connection between the two may be flexible in at least one direction
Data Source
AI summary
Methods and apparatuses for transdermal electrical stimulation. Described herein are single-use or limited-use TES apparatuses and methods of using them that include an integrated (e.g., flex-circuit) electrode assembly and controller apparatus including a waveform generator and power supply. Also described herein are TES apparatuses including a cord or wire having current control circuitry and configured to connect a mobile computing device (e.g., smartphone or wearable electronics) to an electrode assembly. Finally, also described herein are intermediate apparatuses including a flex-circuit electrode assembly including a waveform generator but receiving power from a cable connected to a mobile computing device.