Ionic Touch Panel Hydrogel Stretchability Biocompatibility
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Solution Overview
Problem
Existing touch panels based on hard and brittle materials like indium tin oxide lack high stretchability, flexibility, and biocompatibility, and alternative materials such as carbon nanotubes and graphene suffer from increased sheet resistance and fatigue failure when stretched, with unverified biocompatibility for integration into body parts.
Innovation Solution
An ionic touch panel using hydrogel containing ionic salt as the conductive material, combined with electrodes, which provides high stretchability, flexibility, and biocompatibility, allowing for integration into body parts while maintaining high visible light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transparent electrode materials such as indium tin oxide are used, then low sheet resistance is achieved, but high stretchability and flexibility are lost
Solution Approach 1:
The patent changes the material parameter from rigid crystalline structures (ITO) to soft amorphous polymer structures (polymer electrodes), enabling the material to undergo large deformations while maintaining electrical conductivity. This parameter change allows the electrode to be stretched without breaking, resolving the contradiction between low sheet resistance and high stretchability.
Solution Approach 2:
The patent uses composite polymer electrode materials that combine conductive polymers with flexible substrates, creating a composite structure that maintains both electrical conductivity and mechanical flexibility. This composite approach enables the electrode to achieve both low sheet resistance and high stretchability simultaneously.
2Adaptability or versatility
If polymer electrode materials are used to achieve high stretchability, then flexibility is improved, but sheet resistance increases rapidly when stretched
Solution Approach 1:
The patent employs dynamic electrode structures that can adapt their configuration during stretching. The polymer electrodes are designed to maintain continuous conductive pathways even when deformed, allowing the sheet resistance to remain stable despite changes in geometry during stretching operations.
Solution Approach 2:
The patent optimizes the polymer material parameters including composition, molecular weight, and cross-linking density to maintain electrical conductivity during deformation. By carefully controlling these parameters, the electrode achieves low sheet resistance in the stretched state while maintaining high stretchability.
3Reliability
If conventional transparent electrode materials are used, then electrical conductivity is achieved, but biocompatibility for body part integration is not verified
Solution Approach 1:
The patent changes the material composition from inorganic crystalline materials (ITO) to organic polymer materials that are inherently more biocompatible. The polymer electrodes can be selected to match the mechanical and chemical properties of biological tissues, enabling integration into body parts while maintaining electrical conductivity for touch sensing functions.
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 ionic touch panel achieves high stretchability, flexibility, and biocompatibility, enabling its use in flexible devices and wearable applications with stable performance and biocompatibility for integration into body parts.
Implementation Method 1
hydrogel containing ionic salt as the conductive material
Implementation Method 2
high visible light transmittance
Data Source
Figure 1~2
Figure 3
Figure 4(a)~4(b)
AI summary
The present invention relates to an ionic touch panel, and more particularly, to an ionic touch panel using hydrogel for a touch panel and having flexibility, stretchability, and biocompatibility. An ionic touch panel according to an embodiment of the present invention includes a hydrogel touch unit 100 containing salt, and electrodes connected to at least two parts of the hydrogel touch unit.