Patent ID: 11953350
Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 0:
1. A capacitance detection apparatus, comprising: a sensing module, a connecting circuit, and a differential detection circuit configured to detect changes in capacitance of the sensing module;
the sensing module comprising: a substrate, and a first sensing layer and a second sensing layer respectively located on two sides of the substrate,
a first sensing unit of the first sensing layer is opposite to a second sensing unit of the second sensing layer;
the first sensing unit and the second sensing unit are electrically connected to the differential detection circuit through the connecting circuit, respectively,
wherein the capacitance detection apparatus further comprises an excitation circuit, the first sensing unit and the second sensing unit are electrically connected with the excitation circuit through the connecting circuit respectively, and the excitation circuit is configured to transmit electrical signals to the first sensing unit and the second sensing unit.