Patent ID: 11961470
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A sensing circuit, comprising: an operation amplifier, an integration capacitor, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, and a sixth switch, wherein
the operation amplifier has an in-phase input terminal connected to a first node via the first switch, an anti-phase input terminal connected to a second node, and an output terminal connected to a third node;
the integration capacitor has a first electrode connected to the second node, and a second electrode connected to the third node;
the first node is connected to a sensing line via the second switch, and is connected to a first signal terminal via the third switch;
the second node is connected to the sensing line via the fourth switch, and is connected to a second signal terminal via the fifth switch;
the third node is connected to a signal output terminal of the sensing circuit; and
the second node is connected to the third node via the sixth switch,
wherein the first signal terminal is configured to provide a constant voltage signal, and
the second signal terminal is configured to provide a constant current signal; and
correction for the operation amplifier and the integration capacitor can be achieved according to signals provided from the first signal terminal, the second signal terminal and the sensing line, and a combination of turn-on states and turn-off states of the first switch, the second switch, the third switch, the fourth switch, the fifth switch, and the sixth switch.