STRETCHABLE TOUCHPAD OF CAPACITIVE TYPE

The present invention discloses 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. The present invention discloses 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 the touchpad (10). 揭示了种电容型可拉伸触摸板(10)，包括其中结合了多个导电元件的可拉伸纺织品织物(20)。各导电元件是形成用于检测由触摸导致的电容变化的电极的电阻应变仪(30、40)。还