HoliBraille: Multipoint vibrotactile feedback on mobile devices

Hugo Nicolau, Kyle Montague, Tiago Guerreiro, André Rodrigues, Vicki L. Hanson

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

23 Citations (Scopus)


We propose HoliBraille, a system that enables Braille input and output on current mobile devices. We use vibrotactile motors combined with dampening materials in order to actuate directly on users' fingers. The prototype can be attached to current capacitive touchscreen devices enabling multipoint and localized feedback. HoliBraille can be leveraged in several applications including educational tools for learning Braille, as a communication device for deaf-blind people, and as a tactile feedback system for multitouch Braille input. We conducted a user study with 12 blind participants on Braille character discrimination. Results show that HoliBraille is effective in providing localized feedback; however, character discrimination performance is strongly related with number of simultaneous stimuli. We finish by discussing the obtained results and propose future research avenues to improve multipoint vibrotactile perception.

Original languageEnglish
Title of host publicationW4A 2015 - 12th Web for All Conference
PublisherAssociation for Computing Machinery, Inc
ISBN (Electronic)9781450333429
Publication statusPublished - 18 May 2015
Externally publishedYes
Event12th International Web for All Conference, W4A 2015 - Florence, Italy
Duration: 18 May 201520 May 2015

Publication series

NameW4A 2015 - 12th Web for All Conference


Conference12th International Web for All Conference, W4A 2015


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