Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/14487

TitleTouchscreen based on acoustic pulse recognition with piezoelectric polymer sensors
Author(s)Reis, S.
Correia, Vítor
Martins, M.
Barbosa, G.
Sousa, Rui M.
Minas, Graça
Lanceros-Méndez, S.
Rocha, J. G.
KeywordsPiezoelectric polymer sensors
Touchscreen
Issue date4-Jul-2010
PublisherIEEE
Abstract(s)This article describes the concept, design, fabrication and experimental results of a touchscreen based on acoustic pulse recognition. It uses piezoelectric transducers fabricated from the piezoelectric polymer poly(vinylidene fluoride), PVDF, in its beta phase. The transducers are located at the edges of the panel in order to receive the acoustic pulses generated by the touches. Each transducer is connected to a readout electronic circuit composed by a differential charge amplifier and a comparator, whose output signal is attached to a microcontroller. The microcontroller uses an algorithm to determine the location of the touch, based on the time differences of the transducer signals. The touchscreen itself is made of ordinary glass, providing good durability and optical transparency. The experimental results obtained with the first prototype demonstrate the effectiveness of the method.
TypeConference paper
URIhttp://hdl.handle.net/1822/14487
ISBN978-1-4244-6391-6
DOI10.1109/ISIE.2010.5637672
Publisher versionhttp://dx.doi.org/10.1109/ISIE.2010.5637672
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:DEI - Artigos em atas de congressos internacionais

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