Sensor film for keyboard, has strands that are fed with alternating current, such that the current passes into strands running in opposite direction, for electronically processing contact point at which crosstalk current is reduced

摘要

The sensor film has two mutually insulated strand networks (I,II) with capacitive effect, which are arranged one above the other, such that the strands (a-e) of the strand network (I) intersect with the strands (1-5) of the strand network (II). The strands running in one direction are fed with alternating current, such that the current passes into the strands running in opposite direction by the partial capacitive effect, for electronically processing the contact point at which the crosstalk current arising during the contact is reduced. An independent claim is included for a method for recognizing contact position of sensor film.