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 bend-sensitive 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. Users 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 gestures. We also describe the underlying technology and gesture sensing algorithms. Numerous applications apply the interaction techniques in convincing 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.

Credits: Media Interaction Lab 2016


Christian Rendl, David Kim, Patrick Parzer, Sean Fanello, Martin Zirkl, Gregor Scheipl, Michael Haller, and Shahram Izadi. 2016. FlexCase: Enhancing Mobile Interaction with a Flexible Sensing and Display Cover. In Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems(CHI ’16). ACM, New York, NY, USA, 5138-5150. DOI: https://doi.org/10.1145/2858036.2858314

Project Page

Media Interaction Lab, FH-Hagenberg (AT)

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