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Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

951
A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
951

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Related Experiment Video

Updated: May 7, 2026

Capturing Dynamic Finger Gesturing with High-resolution Surface Electromyography and Computer Vision
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Touch interface for sensing fingertip force in mobile device using electromyogram.

Masato Odagaki, Toshiyuki Taura, Tetsumi Harakawa

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |October 11, 2013
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel 3D touch interface for mobile devices, estimating fingertip force using electromyogram (EMG) signals. This innovation allows for more intuitive and precise force detection in mobile interactions.

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    Area of Science:

    • Human-Computer Interaction
    • Biomedical Engineering
    • Mobile Device Technology

    Background:

    • Current mobile touch interfaces primarily detect 2D position, lacking force feedback.
    • Estimating fingertip force is crucial for advanced interaction and application development.
    • Electromyogram (EMG) signals offer a potential avenue for non-invasive force measurement.

    Purpose of the Study:

    • To develop a three-dimensional (3D) touch interface for mobile devices capable of detecting fingertip force.
    • To integrate an electromyogram (EMG) amplifier with a conventional touch interface for force estimation.
    • To validate the accuracy of the EMG-based force estimation method against traditional force sensors.

    Main Methods:

    • Developed a system combining a standard 2D touch interface with an EMG amplifier.
    • Utilized EMG measurements to estimate fingertip force during touch interactions.
    • Validated the proposed method by comparing estimated forces with data from a calibrated force sensor.
    • Created a proof-of-concept application demonstrating the interface's functionality.

    Main Results:

    • Successfully demonstrated a method for estimating fingertip force using EMG signals.
    • Achieved a correlation between EMG-based force estimation and direct force sensor measurements.
    • Developed a functional application showcasing the 3D touch interface capabilities.

    Conclusions:

    • The developed 3D touch interface effectively estimates fingertip force using EMG signals, enhancing mobile device interaction.
    • This EMG-based approach provides a viable, non-invasive method for incorporating force feedback into mobile devices.
    • The validated interface and developed application pave the way for more sophisticated and immersive mobile user experiences.