A half-implant device on fingernails

Emi Tamaki, Ken Iwasaki

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

3 Citations (Scopus)


Hand gesture feedback systems using tactile or visual information can only be used in given situations because of the limitations of the device features such as the need for a battery. In this paper, we propose a half-implant device located on the fingernail. The half-implant device consists of a radio frequency (RF) receiving antenna, small electronic parts, and UV gel. The UV gel is used to glue the parts onto the user's nail and cover the parts meant to be waterproof. The device receives power from the RF antenna; therefore, it does not require a battery to function. It notifies whether the finger is in a target site by lighting an LED or activating a vibration motor. The primary benefit of this device is that the user can feel hand gesture feedback, anytime and anywhere. The device can be placed on the users' fingernail for approximately three weeks. To verify the devices' influence on the users' pointing task, we conducted a preliminary user study. The task success rate was 100% over the sessions with tactile and visual feedback and 97% without feedback. The experiment revealed that the tactile notification reduced the task time by 12.3 % compared to that of the test with no feedback.

Original languageEnglish
Title of host publicationCHI EA 2014
Subtitle of host publicationOne of a ChiNd - Extended Abstracts, 32nd Annual ACM Conference on Human Factors in Computing Systems
PublisherAssociation for Computing Machinery
Number of pages6
ISBN (Print)9781450324748
Publication statusPublished - 2014
Event32nd Annual ACM Conference on Human Factors in Computing Systems, CHI EA 2014 - Toronto, ON, Canada
Duration: 2014 Apr 262014 May 1

Publication series

NameConference on Human Factors in Computing Systems - Proceedings


Conference32nd Annual ACM Conference on Human Factors in Computing Systems, CHI EA 2014
CityToronto, ON


  • Design
  • Fingertip
  • Half implant
  • Haptic
  • Nail
  • RF (Radio Frequency)
  • Tactile
  • Tangible
  • Wearable

ASJC Scopus subject areas

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


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