EdgeVib : effective alphanumeric character output using a wrist-worn tactile display

Y.-C. Liao, Y.-L. Chen, J.-Y. Lo, R.-H. Liang, L. Chan, B.-Y. Chen

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

47 Citations (Scopus)


This paper presents EdgeVib, a system of spatiotemporal vibration patterns for delivering alphanumeric characters on wrist-worn vibrotactile displays. We first investigated spatiotemporal pattern delivery through a watch-back tactile display by performing a series of user studies. The results reveal that employing a 2×2 vibrotactile array is more effective than employing a 3×3 one, because the lower-resolution array creates clearer tactile sensations in less time consumption. We then deployed EdgeWrite patterns on a 2×2 vibrotactile array to determine any difficulties of delivering alphanumerical characters, and then modified the unistroke patterns into multistroke EdgeVib ones on the basis of the findings. The results of a 24-participant user study reveal that the recognition rates of the modified multistroke patterns were significantly higher than the original unistroke ones in both alphabet (85.9% vs. 70.7%) and digits (88.6% vs. 78.5%) delivery, and a further study indicated that the techniques can be generalized to deliver two-character compound messages with recognition rates higher than 83.3%. The guidelines derived from our study can be used for designing watch-back tactile displays for alphanumeric character output.
Original languageEnglish
Title of host publicationUIST '16: Proceedings of the 29th Annual Symposium on User Interface Software and Technology, 16-19 October 2016, Tokyo, Japan
Place of PublicationNew York
PublisherAssociation for Computing Machinery, Inc
Number of pages7
ISBN (Print)978-1-4503-4189-9
Publication statusPublished - 16 Oct 2016
Externally publishedYes
Event29th Annual ACM Symposium on User Interface Software and Technology (UIST 2016) - Tokyo, Japan
Duration: 16 Oct 201619 Oct 2016
Conference number: 29


Conference29th Annual ACM Symposium on User Interface Software and Technology (UIST 2016)
Abbreviated titleUIST 2016
Internet address


  • alphanumerical character output, spatiotemporal vibrotactile pattern, wrist-worn tactile display


Dive into the research topics of 'EdgeVib : effective alphanumeric character output using a wrist-worn tactile display'. Together they form a unique fingerprint.

Cite this