Touch sensor, touch detection device and detection method, and touch control apparatus

A touch control apparatus, comprising a touch detection device, wherein the touch detection device comprises :

• a touch sensor comprising:
• a first electrode layer, a rigid insulating layer, a second electrode layer, a compressible layer, and a third electrode layer disposed successively,
• wherein the compressible layer is configured to change the distance between the second electrode layer and the third electrode layer when being subjected to a touch pressure;
• the first electrode layer is configured to form a touch sensing component alone or form a touch sensing component together with the second electrode layer;
• and
• the second electrode layer and the third electrode layer form a capacitor structure, and a capacitance value of the capacitor structure varies with the distance between the second electrode layer and the third electrode layer;
• a driving circuit configured to drive the first electrode layer, the second electrode layer, and the third electrode layer;
• and
• a touch pressure detection unit configured to calculate pressure information of a user's touch operation from a detected change of the capacitance value of the capacitor structure.