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Open AccessArticle

Development of Haptic Stylus for Manipulating Virtual Objects in Mobile Devices

Interaction Laboratory, Advanced Research Technology Center, Interdisciplinary Program in Creative Engineering, Korea University of Technology and Education, 1600, Chungjeol-ro, Dongnam-gu, Cheonan 31253, Korea
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Actuators 2020, 9(2), 30; https://doi.org/10.3390/act9020030
Received: 24 March 2020 / Revised: 10 April 2020 / Accepted: 12 April 2020 / Published: 14 April 2020
(This article belongs to the Special Issue Miniature and Micro-Actuators)
In mobile devices, the screen size limits conveyance of immersive experiences; haptic feedback coupled with visual feedback is expected to have a better effect to maximize the level of immersion. Therefore, this paper presents a miniature tunable haptic stylus based on magnetorheological (MR) fluids to provide kinesthetic information to users. The designed stylus has a force generation, force transmission, and housing part; moreover, in the stylus, all three operating modes of MR fluids contribute to the haptic actuation to produce a wide range of resistive force generated by MR fluids in a limited size, thereby providing a variety of pressing sensations to users. A universal testing machine was constructed to evaluate haptic performance of the proposed haptic stylus, whose resistive force was measured with the constructed setup as a function of pressed depth and input current, and by varying the pressed depth and pressing speed. Under maximum input voltage, the stylus generates a wide range of resistive force from 2.33 N to 27.47 N, whereas under maximum pressed depth it varied from 1.08 N to 27.47 N with a corresponding change in voltage input from 0 V to 3.3 V. Therefore, the proposed haptic stylus can create varied haptic sensations. View Full-Text
Keywords: miniature stiffness display; MR fluids; haptic; multiple mode miniature stiffness display; MR fluids; haptic; multiple mode
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Choi, D.-S.; Yun, I.-H.; Kim, T.-H.; Byeon, S.; Kim, S.-Y. Development of Haptic Stylus for Manipulating Virtual Objects in Mobile Devices. Actuators 2020, 9, 30.

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