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Marked Object Recognition Multitouch Screen Printed Touchpad for Interactive Applications

Center of Physics, University of Minho, 4710-057 Braga, Portugal
Centro ALGORITMI, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
Basque Center for Materials, Applications and Nanostructures (BCMaterials), 48160 Derio, Spain
engageLab, University of Minho, 4810-453 Guimarães, Portugal
Ikerbasque, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Sensors 2017, 17(12), 2786;
Received: 29 September 2017 / Revised: 23 November 2017 / Accepted: 24 November 2017 / Published: 1 December 2017
(This article belongs to the Special Issue Tactile Sensors and Sensing)
PDF [2745 KB, uploaded 1 December 2017]


The market for interactive platforms is rapidly growing, and touchscreens have been incorporated in an increasing number of devices. Thus, the area of smart objects and devices is strongly increasing by adding interactive touch and multimedia content, leading to new uses and capabilities. In this work, a flexible screen printed sensor matrix is fabricated based on silver ink in a polyethylene terephthalate (PET) substrate. Diamond shaped capacitive electrodes coupled with conventional capacitive reading electronics enables fabrication of a highly functional capacitive touchpad, and also allows for the identification of marked objects. For the latter, the capacitive signatures are identified by intersecting points and distances between them. Thus, this work demonstrates the applicability of a low cost method using royalty-free geometries and technologies for the development of flexible multitouch touchpads for the implementation of interactive and object recognition applications. View Full-Text
Keywords: flexible sensors; touch sensors; object recognition; printable sensors; tactile data processing flexible sensors; touch sensors; object recognition; printable sensors; tactile data processing

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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 (CC BY 4.0).

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Nunes, J.S.; Castro, N.; Gonçalves, S.; Pereira, N.; Correia, V.; Lanceros-Mendez, S. Marked Object Recognition Multitouch Screen Printed Touchpad for Interactive Applications. Sensors 2017, 17, 2786.

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