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Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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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...
949

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Related Experiment Video

Updated: Apr 29, 2026

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

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Precise shape reconstruction by active pattern in total-internal-reflection-based tactile sensor.

Satoshi Saga, Ryosuke Taira, Koichiro Deguchi

    IEEE Transactions on Haptics
    |May 22, 2014
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel tactile sensor using total internal reflection for precise shape reconstruction. Active patterns and optimization methods enhance accuracy in real-time deformation sensing.

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    Area of Science:

    • Robotics
    • Optical Sensing
    • Material Science

    Background:

    • Tactile sensors are crucial for robotic manipulation and human-computer interaction.
    • Existing methods often face limitations in precision and real-time feedback.
    • Optical reflection-based sensing offers a promising avenue for tactile feedback.

    Purpose of the Study:

    • To develop a total-internal-reflection-based tactile sensor for precise shape reconstruction.
    • To enhance reconstruction accuracy using optimization and active pattern techniques.
    • To enable real-time deformation sensing for advanced tactile applications.

    Main Methods:

    • Utilizing a silicone rubber sensor with an embedded image pattern and a camera.
    • Implementing total internal reflection for optical pattern reflection.
    • Employing an optimization method for precise real-time shape reconstruction.
    • Introducing active patterns to mitigate reconstruction errors caused by deformation.

    Main Results:

    • Successful implementation of optimization and active-pattern-based reconstruction.
    • Demonstrated precise real-time shape and deformation reconstruction.
    • Experimental validation confirmed the linearity and precision of the developed tactile sensor.

    Conclusions:

    • The proposed total-internal-reflection tactile sensor with optimization and active patterns achieves high precision and real-time capabilities.
    • This technology has the potential to significantly advance robotic sensing and interaction.
    • Further research can explore integration into more complex robotic systems.