公开(公告)号：US11709565B2

公开(公告)日：2023-07-25

申请号：US17558611

申请日：2021-12-22

Applicant: Novatek Microelectronics Corp.

Inventor： Yu-Hsien Lee ,  Ting-Hsuan Hung ,  Feng-Lin Chan ,  Wu Wei Lin

IPC: G06F3/041 ,  G06V40/13

CPC classification number: G06F3/04166 ,  G06F3/0412 ,  G06F3/04164 ,  G06V40/13

Abstract: A fingerprint sensing apparatus includes a plurality of fingerprint sensors and a fingerprint readout circuit. The fingerprint sensors may be configured to operate in a fingerprint sensing cycle. The fingerprint readout circuit may be coupled to the plurality of fingerprint sensors via a plurality of sensing lines. The fingerprint readout circuit may be configured to control the fingerprint sensors to operate in the fingerprint sensing cycle. The fingerprint sensing cycle includes an initialization period, an exposure period and a readout period. A voltage of a reset node in each fingerprint sensor among the plurality of fingerprint sensors is reset to a first voltage in a reset period after the fingerprint sensing cycle ends. The voltage of the reset node in each fingerprint sensor is initialized to an initial voltage in the initialization period. The initial voltage is different from the first voltage.

公开(公告)号：US20220197469A1

公开(公告)日：2022-06-23

申请号：US17558611

申请日：2021-12-22

Applicant: Novatek Microelectronics Corp.

Inventor： Yu-Hsien Lee ,  Ting-Hsuan Hung ,  Feng-Lin Chan ,  Wu Wei Lin

IPC: G06F3/041 ,  G06V40/13

Abstract: A fingerprint sensing apparatus includes a plurality of fingerprint sensors and a fingerprint readout circuit. The fingerprint sensors may be configured to operate in a fingerprint sensing cycle. The fingerprint readout circuit may be coupled to the plurality of fingerprint sensors via a plurality of sensing lines. The fingerprint readout circuit may be configured to control the fingerprint sensors to operate in the fingerprint sensing cycle. The fingerprint sensing cycle includes an initialization period, an exposure period and a readout period. A voltage of a reset node in each fingerprint sensor among the plurality of fingerprint sensors is reset to a first voltage in a reset period after the fingerprint sensing cycle ends. The voltage of the reset node in each fingerprint sensor is initialized to an initial voltage in the initialization period. The initial voltage is different from the first voltage.