FlexCase: Enhancing mobile interaction with a flexible sensing and display cover

Christian Rendl, David Kim, Patrick Parzer, Sean Fanello, Martin Zirkl, Gregor Scheipl, Michael Haller, Shahram Izadi

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

26 Citations (Scopus)


FlexCase is a novel flip cover for smartphones, which brings flexible input and output capabilities to existing mobile phones. It combines an e-paper display with a pressure- and bendsensitive input sensor to augment the capabilities of a phone. Due to the form factor, FlexCase can be easily transformed into several different configurations, each with different interaction possibilities. We can use FlexCase to perform a variety of touch, pressure, grip and bend gestures in a natural manner, much like interacting with a sheet of paper. The secondary e-paper display can act as a mechanism for providing user feedback and persisting content from the main display. In this paper, we explore the rich design space of FlexCase and present a number of different interaction techniques. Beyond, we highlight how touch and flex sensing can be combined to support a novel type of gestures, which we call Grip & Bend. We also describe the underlying technology and gesture sensing algorithms. Numerous applications apply the interaction techniques in real-world examples, including enhanced e-paper reading and interaction, a new copy-and-paste metaphor, high degree of freedom 3D and 2D manipulation, and the ability to transfer content and support input between displays in a natural and flexible manner.

Original languageEnglish
Title of host publicationCHI 2016 - Proceedings, 34th Annual CHI Conference on Human Factors in Computing Systems
PublisherAssociation for Computing Machinery
Number of pages13
ISBN (Electronic)9781450333627
Publication statusPublished - 7 May 2016
Event34th Annual Conference on Human Factors in Computing Systems, CHI 2016 - San Jose, United States
Duration: 7 May 201612 May 2016

Publication series

NameConference on Human Factors in Computing Systems - Proceedings


Conference34th Annual Conference on Human Factors in Computing Systems, CHI 2016
Country/TerritoryUnited States
CitySan Jose


  • Deformation
  • Flexible
  • Grip detection
  • Input
  • Output
  • Sensor


Dive into the research topics of 'FlexCase: Enhancing mobile interaction with a flexible sensing and display cover'. Together they form a unique fingerprint.

Cite this