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http://dx.doi.org/10.5391/JKIIS.2014.24.2.136

Multi-touch Recognition and Tracking for Self Capacitive TSP  

Jung, Sung Hoon (Department of Information and Communications Engineering, Hansung University)
Publication Information
Journal of the Korean Institute of Intelligent Systems / v.24, no.2, 2014 , pp. 136-140 More about this Journal
Abstract
This paper introduces a multi-touch recognition and tracking method for self capacitive TSP(Touch Screen Pannel). Self capacitive TSP recognizes finger touches by sensing capacitive change of ITO transparent conducting film arranged by rows and columns on the TSP pannel. They have some advantages such as high SNR, fast sensing, and simple touch processing, but have very difficulties for multi-touch processing. This disadvantage makes that the mutual capacitive TSPs, which have no such disadvantage, have been more widely used especially for multi-touch applications. However, since the other applications for remote control pad or recently developed wearable devises have only restrictive requirements for multi-touch, the disadvantage of self capacitive TSP is not a critical problem. In this paper, we first describe multi-touch recognition problems in self capacitive TSP and then propose how to overcome those problems and a tracking method of two touches when they are moving. Experimental results of our method showed that our algorithm works well in two touches.
Keywords
Self Capacitive; TSP(Touch Screen Pannel); Multi-touch Recognition and Tracking;
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  • Reference
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