公开(公告)号：US20210097318A1

公开(公告)日：2021-04-01

申请号：US17015085

申请日：2020-09-09

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jung-Chen Chung ,  Jen-Yi Lin ,  Min Huang

IPC: G06K9/20 ,  H04N5/378 ,  G06K9/00

Abstract: An image sensing circuit includes a plurality of readout circuits and a pre-charge control circuit. Each of the readout circuits is coupled to a sensing line among a plurality of sensing lines and configured to receive a sensing voltage among a plurality of sensing voltages through the corresponding sensing line, wherein at least one of the readout circuits is further configured to receive at least one first pre-scan voltage through the corresponding sensing line prior to reception of the sensing voltage. The pre-charge control circuit, coupled to the readout circuits, is configured to perform a plurality of steps. The steps include receiving the at least one first pre-scan voltage from the at least one readout circuit; calculating a first pre-charge voltage according to the at least one first pre-scan voltage; and pre-charging the sensing lines to the first pre-charge voltage before the readout circuits receive the sensing voltages.

公开(公告)号：US20200065544A1

公开(公告)日：2020-02-27

申请号：US16105977

申请日：2018-08-21

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jung-Chen Chung ,  Chi-Ting Chen

IPC: G06K9/00

Abstract: A fingerprint sensing method and a fingerprint sensing device are provided. The fingerprint sensing method includes the following steps. A first supply voltage is provided to power a fingerprint sensing circuit of the fingerprint sensing circuit. When the fingerprint sensing circuit is powered by the first supply voltage, it is detected whether a finger touch occurs. In response to determining that the finger touch has occurred, a second supply voltage is provided to power the fingerprint sensing device. A fingerprint image sensing is performed to obtain a fingerprint image when the fingerprint sensing circuit is powered by the second supply voltage.