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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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Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
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Overview of Somatic Sensory Pathways01:29

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Layout Transposition for Non-Visual Navigation of Web Pages by Tactile Feedback on Mobile Devices.

Fabrice Maurel1, Gaël Dias1, Waseem Safi2

  • 1Groupe de Recherche en Informatique, Automatique, Image et Instrumentation (GREYC), National Graduate School of Engineering and Research Center (ENSICAEN), Université de Caen Normandie (UNICAEN), 14000 Caen, France.

Micromachines
|April 9, 2020
PubMed
Summary

This study evaluated a new system that converts web page visuals into tactile feedback for blind and sighted users. The system uses a portable vibrotactile device to help users perceive web page structures through touch.

Keywords:
blind usersvibrotactile feedbackweb accessibility

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Area of Science:

  • Human-Computer Interaction
  • Assistive Technology
  • Haptics

Background:

  • Web accessibility remains a challenge for visually impaired users.
  • Existing assistive technologies often lack portability or are costly.
  • There is a need for intuitive methods to convey complex visual information through non-visual means.

Purpose of the Study:

  • To evaluate the performance of sighted and blind individuals in discriminating web page structures using a novel vibrotactile feedback system.
  • To assess the effectiveness of a portable visuo-tactile substitution system for web navigation.
  • To measure user perception of tactile stimuli (intensity, frequency, temperature) and shape understanding.

Main Methods:

  • Developed a portable, economical visuo-tactile substitution system converting web page structures into tactile landscapes.
  • Utilized a micro-controller and actuators to translate visual contrasts into dynamic vibrating patterns on the skin.
  • Empirically studied user performance by measuring perception thresholds and qualitative understanding of displayed shapes.

Main Results:

  • The system successfully translated visual web page structures into explorable tactile landscapes.
  • User performance was measured in terms of frequency and intensity perception thresholds.
  • Qualitative assessment focused on the users' understanding of the tactilely represented shapes.

Conclusions:

  • The proposed vibrotactile system offers a promising approach for enhancing web accessibility for visually impaired users.
  • The portable and economical design makes it suitable for noisy and public environments.
  • Further research can refine the tactile feedback mechanisms for improved perception and navigation.