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Journal of Biomedicine and Biotechnology
Volume 2008 (2008), Article ID 369651, 11 pages
http://dx.doi.org/10.1155/2008/369651
Research Article

Haptic Stylus and Empirical Studies on Braille, Button, and Texture Display

POST-PC Research Group, Electronics and Telecommunications Research Institute, Yuseong-Gu, Daejeon 305-700, South Korea

Received 2 September 2007; Revised 16 December 2007; Accepted 24 December 2007

Academic Editor: Daniel Howard

Copyright © 2008 Ki-Uk Kyung et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a haptic stylus interface with a built-in compact tactile display module and an impact module as well as empirical studies on Braille, button, and texture display. We describe preliminary evaluations verifying the tactile display's performance indicating that it can satisfactorily represent Braille numbers for both the normal and the blind. In order to prove haptic feedback capability of the stylus, an experiment providing impact feedback mimicking the click of a button has been conducted. Since the developed device is small enough to be attached to a force feedback device, its applicability to combined force and tactile feedback display in a pen-held haptic device is also investigated. The handle of pen-held haptic interface was replaced by the pen-like interface to add tactile feedback capability to the device. Since the system provides combination of force, tactile and impact feedback, three haptic representation methods for texture display have been compared on surface with 3 texture groups which differ in direction, groove width, and shape. In addition, we evaluate its capacity to support touch screen operations by providing tactile sensations when a user rubs against an image displayed on a monitor.