MagPen: magnetically driven pen interactions on and around conventional smartphones

Authors:
Sungjae Hwang;Andrea Bianchi;Myungwook Ahn;Kwangyun Wohn
Affiliations:
Korea Advanced Institute of Science & Technology, Daejeon, Republic of Korea;Sungkyunkwan University, Seoul, Republic of Korea;Korea Advanced Institute of Science & Technology, Daejeon, Republic of Korea;Korea Advanced Institute of Science & Technology, Daejeon, Republic of Korea
Venue:
Proceedings of the 15th international conference on Human-computer interaction with mobile devices and services
Year:
2013

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Abstract

This paper introduces MagPen, a magnetically driven pen interface that works both on and around mobile devices. The proposed device is accompanied by a new vocabulary of gestures and techniques that increase the expressiveness of the standard capacitive stylus. These techniques are: 1) detecting the orientation that the stylus is pointing to, 2) selecting colors using locations beyond screen boundaries, 3) recognizing different spinning gestures associated with different actions, 4) inferring the pressure being applied to the pen, and 5) identifying various pens associated with different operational modes. These techniques are achieved using commonly available smartphones that sense and analyze the magnetic field produced by a permanent magnet embedded in a standard capacitive stylus. This paper explores how magnets can be used to expand the design space of current pen interaction, and proposes a new technology to achieve such results.