Pressure detection sensor having a plurality of dielectric layers and a plurality of electrode layers with conductive paths and wiring portions

A pressure detection apparatus comprising:

• a pressure detection sensor;
• a signal processor connected to the pressure detection sensor and configured to process an electric signal generated by the pressure detection sensor;
• and
• a controller connected to the signal processor and configured to generate a control signal on the basis of the signal processed by the signal processor,
• wherein the pressure detection sensor includes:
• a first electrode layer including a plurality of conductive paths configured to output at least one sensing signal and a plurality of wiring portions, each of the wiring portions is connected to a different one of the conductive paths;
• a first elastic dielectric layer disposed on the first electrode layer in a first direction;
• a second electrode layer disposed on the first elastic dielectric layer in the first direction at a position corresponding to all the conductive paths of the first electrode layer such that the second electrode layer covers all the conductive paths wherein the second electrode layer is not disposed at a position corresponding to the plurality of wiring portions of the first electrode layer;
• a second elastic dielectric layer disposed on the second electrode layer in the first direction;
• and
• a third electrode layer disposed on the second elastic dielectric layer in the first direction, wherein the third electrode layer is disposed at at least one position corresponding to the plurality of wiring portions such that the third electrode layer covers part of the wiring portions of the first electrode layer in the first direction,
• wherein, when a pressure is applied to the third electrode layer, capacitances of the first elastic dielectric layer and the second elastic dielectric layer are changed.