Lighttouch gadgets: Extending interactions on capacitive touchscreens by converting light emission to touch inputs

Kaori Ikematsu, Kunihiro Kato, Yoshihiro Kawahara

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

Abstract

We present LightTouch, a 3D-printed passive gadget to enhance touch interactions on unmodifed capacitive touchscreens. The LightTouch gadgets simulate fnger operations such as tapping, swiping, and multi-touch gestures by means of conductive materials and light-dependent resistors (LDR) embedded in the object. The touchscreen emits visible light and the LDR senses the level of this light, which changes its resistance value. By controlling the screen brightness, it intentionally connects or disconnects the path between the GND and the touchscreen, thus allowing the touch inputs to be controlled. In contrast to conventional physical extensions for touchscreens, our technique requires neither continuous fnger contact on the conductive part nor the use of batteries. As such, it opens up new possibilities for touchscreen

Original languageEnglish
Title of host publicationCHI 2021 - Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems
Subtitle of host publicationMaking Waves, Combining Strengths
PublisherAssociation for Computing Machinery
ISBN (Electronic)9781450380966
DOIs
Publication statusPublished - 2021 May 6
Externally publishedYes
Event2021 CHI Conference on Human Factors in Computing Systems: Making Waves, Combining Strengths, CHI 2021 - Virtual, Online, Japan
Duration: 2021 May 82021 May 13

Publication series

NameConference on Human Factors in Computing Systems - Proceedings

Conference

Conference2021 CHI Conference on Human Factors in Computing Systems: Making Waves, Combining Strengths, CHI 2021
Country/TerritoryJapan
CityVirtual, Online
Period21/5/821/5/13

Keywords

  • 3d print
  • Capacitive touchscreen
  • light-dependent resistor
  • Tangible
  • Touch interaction

ASJC Scopus subject areas

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

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