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Related Concept Videos

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...
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Design Example01:23

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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
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Three-Dimensional Touch Device with Two Terminals.

Youngjun Cho1,2,3, Taehoon Kim1,2, Gwangmook Kim1,2

  • 1Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, South Korea.

Advanced Materials (Deerfield Beach, Fla.)
|August 24, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method using two electrodes to pinpoint multiple positions, simplifying device wiring and fabrication. This innovation enables precise 3D coordinate determination, revolutionizing input device design.

Keywords:
3D touchcapacitive pressure sensorsgradient patternsinkjet printingtwo terminals

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Device Physics

Background:

  • Crossbar arrays are crucial for device operation but present wiring complexities for numerous electrodes.
  • Addressing many positions in crossbar arrays leads to significant challenges in wiring and fabrication.

Purpose of the Study:

  • To propose a simplified method for determining multiple positions using only two electrodes.
  • To demonstrate a novel approach for simplifying input device architectures.

Main Methods:

  • Utilizing resistance changes with distance to determine coordinates.
  • Analyzing resistance variations based on electrode composition.
  • Measuring capacitance fluctuations due to dielectric thickness changes.
  • Employing two-terminal transparent electrodes for device fabrication.

Main Results:

  • Successfully determined x-y-z coordinates without defining node locations.
  • Demonstrated a simplified wiring and device fabrication process.
  • Fabricated a fully functional 3D touch device.

Conclusions:

  • The proposed two-electrode method significantly simplifies the determination of multiple positions.
  • This approach offers a groundbreaking method for simplifying input device architectures.
  • The successful fabrication of a 3D touch device validates the proposed methodology.