EventsProf. Çağatay Başdoğan

HaptiStylus: A Stylus with Haptic Feedback for Mobile Applications

With the emergence of mobile devices, stylus-based interaction has been receiving increasing attention. Unfortunately, styluses available in the market today are all passive instruments that are primarily used for writing and pointing. In this talk, I will introduce a novel stylus capable of displaying certain vibrotactile and inertial haptic effects to the user. Our stylus is equipped with two vibration actuators at the ends, which are used to create a tactile sensation of up and down movement along the stylus. The stylus is also embedded with a DC motor, which is used to create a sense of bidirectional rotational torque about the long axis of the pen. Through two psychophysical experiments, we show that, when driven with carefully selected timing and actuation patterns, our haptic stylus can convey movement and rotational torque information to the user. Results from a further psychophysical experiment provide insight on how the shape of the actuation patterns affects the perception of rotational torque. Finally, experimental results from our interactive pen-based game show that our haptic stylus is effective in practical settings.

Keywords: haptics, vibrotactile, pen computing, torque perception, tactile illusions, computer games

Çağatay Başdoğan Bilkent UNAM

About The Speaker

Cagatay Basdogan Bilkent UNAM

Prof. Basdogan is a member of faculty in College of Engineering at Koc University since 2002. Before joining to Koc University, he was a senior member of technical staff at Information and Computer Science Division of NASA-Jet Propulsion Laboratory of California Institute of Technology from 1999 to 2002. At JPL, he worked on 3D reconstruction of Martian models from stereo images captured by a rover and their haptic visualization on Earth. He moved to JPL from Massachusetts Institute of Technology where he was a research scientist and principal investigator at MIT Research Laboratory of Electronics and a member of the MIT Touch Lab from 1996 to 1999. At MIT, he was involved in the development of algorithms that enable a user to touch and feel virtual objects through a haptic device (force-reflecting robotic arm). He received his Ph.D. degree from Southern Methodist University in 1994 and worked for Musculographics Inc. at Northwestern University Research Park for two years before moving to MIT. Prof. Basdogan conducts research and development in the areas of human-machine interfaces, control systems, mechatronics, biomechanics, computer graphics, and virtual reality technology. In particular, he is known for his work in the area of human and machine haptics (sense of touch) with applications to medical robotics and simulation, robotic path planning, micro/nano/optical tele-manipulation, human-robot interaction, molecular docking, information visualization, and understanding of human perception and cognition in virtual worlds. He is currently the associate editor in chief (AEiC) of the IEEE Transactions on Haptics and also in the editorial boards of IEEE Transactions on Mechatronics, Presence: Teleoperators and Virtual Worlds (MIT Press), and Computer Animation and Virtual Worlds (Wiley) journals. In addition to serving in the program and organizational committees of several conferences, he also chaired the IEEE World Haptics Conference in 2011.