ELECTRIC CAPACITIVE INPUT DEVICE

摘要

PURPOSE: An electric capacitive input device is provided to simplify the structure of a sensor by excluding an additional dielectric medium and using the air as a medium. CONSTITUTION: Elastic layers(105,109) maintains the conductive electrode plates(103,113) at a certain distance, and is transformed and restored depending on whether or not an applied pressure exists. The elastic layer includes an air layer(119), and the air layer receives the air in the position corresponding to the firs and second conductive plates. A sensing signal output unit outputs a sensing signal corresponding to the electrostatic capacitance by sensing the variation of the capacitance which changes depending on the variation of the distance between the first and second conductive plates.