公开(公告)号：US20180217715A1

公开(公告)日：2018-08-02

申请号：US15880632

申请日：2018-01-26

Applicant: Sanko Tekstil Isletmeleri San. Ve Tic. A.S.

Inventor： Özgür COBANOGLU ,  Leyla ZENGI ,  Günes BANAZILI ,  Merve Nagihan AKCAY ,  Kenan LOYAN ,  Özgür AKDEMIR ,  Fehim CAGLAR

IPC: G06F3/041 ,  G01L1/26 ,  G01L1/22 ,  G01L1/14 ,  G06F3/044 ,  G06F3/045 ,  G06F1/16

Abstract: It is disclosed a stretchable touchpad (10) of the capacitive type including a stretchable textile fabric (20) having a plurality of conductive elements incorporated therein. The conductive elements are resistive strain gauges (30, 40) which form electrodes to detect a change of capacitance caused by a touch. It is also disclosed a method for operating a stretchable touchpad (10) comprising the steps of measuring continuously a capacitance analog signal provided by a resistive strain gauge (30, 40) of the stretchable touchpad (10); and comparing the measured capacitance signal with a threshold value in order to determine whether or not a touch has taken place, wherein the threshold value is continuously adjusted as a function of the actual measurement of capacitance and as a function of the resistance of said resistive strain gauges (30, 40) which form the capacitor electrodes of said touchpad (10).