ScraTouch: Extending touch interaction technique using fingernail on capacitive touch surfaces

Kaori Ikematsu, Shota Yamanaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We present ScraTouch, an interaction technique using fingernails, as a new input modality for capacitive touch surfaces. We revealed the differences between the fingertip and the nail from the viewpoint of capacitance touch sensing. Differentiating between fingertip and fingernail touches requires only tens of milliseconds worth of shunt current data from the capacitive touch sensing mechanism, thus external sensors or other hardware are unnecessary. Owing to the small amount of friction generated when a nail touches the surface, not only tapping but also touch gestures by sliding a nail can be easily performed. In our initial investigation, we confirmed that setting a simple threshold on the measured shunt current for recognition works robustly.

Original languageEnglish
Title of host publicationCHI EA 2020 - Extended Abstracts of the 2020 CHI Conference on Human Factors in Computing Systems
PublisherAssociation for Computing Machinery
ISBN (Electronic)9781450368193
DOIs
Publication statusPublished - 2020 Apr 25
Externally publishedYes
Event2020 ACM CHI Conference on Human Factors in Computing Systems, CHI EA 2020 - Honolulu, United States
Duration: 2020 Apr 252020 Apr 30

Publication series

NameConference on Human Factors in Computing Systems - Proceedings

Conference

Conference2020 ACM CHI Conference on Human Factors in Computing Systems, CHI EA 2020
CountryUnited States
CityHonolulu
Period20/4/2520/4/30

Keywords

  • Capacitive touch surface
  • Fingernail
  • Touch inputs

ASJC Scopus subject areas

  • Human-Computer Interaction
  • Computer Graphics and Computer-Aided Design
  • Software

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