Patent ID: 10001892

Abstract:
A self-capacitive touch and force sensing apparatus includes a metal layer, a sensing component layer, an air gap layer and a processing module. The sensing component layer is disposed above metal layer. The air gap layer is formed between metal layer and sensing component layer. When the self-capacitive touch and force sensing apparatus is operated in a self-capacitive touch sensing mode, metal layer is driven and synchronized with a touch signal, so that no capacitive effect between sensing component layer and metal layer and a first capacitance change is sensed; when the self-capacitive touch and force sensing apparatus is operated in a self-capacitive force sensing mode, metal layer is grounded, so that there is a capacitive effect between sensing component layer and metal layer and a second capacitance change is sensed. The processing module obtains a third capacitance change according to first capacitance change and second capacitance change.