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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

514
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...
514

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Fluorescent Paper Strips for the Detection of Diesel Adulteration with Smartphone Read-out
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Smartphone Screen Integrated Optical Breathalyzer.

Jerome Lapointe1, Hélène-Sarah Bécotte-Boutin2, Stéphane Gagnon1

  • 1Centre d'Optique, Photonique et Laser (COPL), 2375 Rue de la Terrasse, Université Laval, Québec, QC G1V 0A6, Canada.

Sensors (Basel, Switzerland)
|July 2, 2021
PubMed
Summary

A novel, inexpensive breathalyzer integrated into mobile device screens could reduce alcohol-related accidents. This technology measures breath alcohol content by analyzing fog evaporation on the screen, potentially saving lives.

Keywords:
alcoholbreath analysis devicebreathalyzerethanolhealthmobile screenmultimedia screensensorssmartphonewearable

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Area of Science:

  • Engineering
  • Biomedical Engineering
  • Sensor Technology

Background:

  • Alcohol abuse contributes significantly to fatal car accidents.
  • Widespread access to breathalyzers could mitigate alcohol-related tragedies.
  • Integrating breathalyzers into mobile devices overcomes reluctance to carry separate devices.

Purpose of the Study:

  • To propose an inexpensive breathalyzer integrated into mobile device screens.
  • To develop a sensor technology for real-time alcohol detection.
  • To link breath alcohol content to blood alcohol content for safety applications.

Main Methods:

  • Utilized the evaporation rate of breath-induced fog on a phone screen.
  • Employed a photodiode to measure scattered light intensity from the phone display.
  • Leveraged evanescent field coupling within the Gorilla glass stress layer.

Main Results:

  • Demonstrated a correlation between measured light intensity signatures and blood alcohol content.
  • Successfully fabricated and tested a prototype breathalyzer integrated into a smartphone.
  • Validated the device's functionality in real-world environments.

Conclusions:

  • The proposed technology offers a low-cost, integrated solution for breath alcohol detection.
  • Further development is needed to create a fully operational mobile breathalyzer.
  • This innovation has the potential to significantly improve road safety and reduce alcohol-related incidents.