公开(公告)号：US12205401B2

公开(公告)日：2025-01-21

申请号：US17985895

申请日：2022-11-13

Applicant: Novatek Microelectronics Corp.

Inventor： Chi-Ting Chen

IPC: G06V40/13

Abstract: A readout integrated circuit configured to read out sensing signals from an optical sensing panel is provided. The optical sensing panel includes a sensor array for fingerprint sensing. The readout integrated circuit includes a plurality of input terminals and a first discharging circuit. The plurality of input terminals are coupled to a plurality of output terminals of the optical sensing panel. The first discharging circuit is coupled to one of the plurality of input terminals. The first discharging circuit serves to discharge an output terminal included in the plurality of output terminals of the optical sensing panel by a first current during a readout period. The readout integrated circuit reads out a voltage of the output terminal as a sensing signal. The first discharging circuit includes a first switch element controlled by a control signal and a first current source which generates the first current.

公开(公告)号：US20230070145A1

公开(公告)日：2023-03-09

申请号：US17985895

申请日：2022-11-13

Applicant: Novatek Microelectronics Corp.

Inventor： Chi-Ting Chen

IPC: G06V40/13

Abstract: A readout integrated circuit configured to read out sensing signals from an optical sensing panel is provided. The optical sensing panel includes a sensor array for fingerprint sensing. The readout integrated circuit includes a plurality of input terminals and a first discharging circuit. The plurality of input terminals are coupled to a plurality of output terminals of the optical sensing panel. The first discharging circuit is coupled to one of the plurality of input terminals. The first discharging circuit serves to discharge an output terminal included in the plurality of output terminals of the optical sensing panel by a first current during a readout period. The readout integrated circuit reads out a voltage of the output terminal as a sensing signal. The first discharging circuit includes a first switch element controlled by a control signal and a first current source which generates the first current.

公开(公告)号：US11201181B2

公开(公告)日：2021-12-14

申请号：US17078060

申请日：2020-10-22

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chi-Ting Chen

IPC: H01L27/146

Abstract: An image sensor includes a sensor layer and a metal layer. The sensor layer includes a plurality of sensing elements arranged as a 2-dimensional array along a first direction and a second direction. The metal layer includes a plurality of metal wires configured to form a plurality of apertures superposed on the plurality of sensing elements. At least one of the plurality of metal wires forming the plurality of apertures is entirely disposed along a third direction different from the first direction and the second direction.

公开(公告)号：US11178351B1

公开(公告)日：2021-11-16

申请号：US16869584

申请日：2020-05-07

Applicant: Novatek Microelectronics Corp.

Inventor： Kuo Wei Cheng ,  Chi-Ting Chen

IPC: H04N5/378 ,  H04N5/357 ,  H01L27/146 ,  H04N5/3745

Abstract: A readout circuit is provided. The readout circuit is coupled to a pixel circuit for reading out signals from the pixel circuit. The readout circuit includes a biasing circuit. The biasing circuit includes a cascode transistor and a biasing transistor. A first terminal of the cascode transistor is coupled to an output terminal of the biasing circuit and the pixel circuit. A second terminal of the cascode transistor is coupled to a first terminal of the biasing transistor. A second terminal of the biasing transistor is coupled to a negative voltage.

公开(公告)号：US20210352237A1

公开(公告)日：2021-11-11

申请号：US16869584

申请日：2020-05-07

Applicant: Novatek Microelectronics Corp.

Inventor： Kuo Wei Cheng ,  Chi-Ting Chen

IPC: H04N5/378 ,  H04N5/3745 ,  H04N5/357 ,  H01L27/146

Abstract: A readout circuit is provided. The readout circuit is coupled to a pixel circuit for reading out signals from the pixel circuit. The readout circuit includes a biasing circuit. The biasing circuit includes a cascode transistor and a biasing transistor. A first terminal of the cascode transistor is coupled to an output terminal of the biasing circuit and the pixel circuit. A second terminal of the cascode transistor is coupled to a first terminal of the biasing transistor. A second terminal of the biasing transistor is coupled to a negative voltage.

公开(公告)号：US11112302B2

公开(公告)日：2021-09-07

申请号：US16290948

申请日：2019-03-03

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jung-Chen Chung ,  Chi-Ting Chen

IPC: G01J1/44 ,  H03K3/356

Abstract: A method of switching a control voltage of a photo sensor cell for a photo sensor includes when the photo sensor cell is switched from a turned-off state to an turned-on state, sequentially switching the control voltage to at least one first voltage provided by at least one first voltage supply, and switching the control voltage to a first target voltage provided by a first charging pump circuit; and when the photo sensor cell is switched from the turned-on state to the turned-off state, sequentially switching the control voltage to at least one second voltage provided by at least one second voltage supply or a ground voltage, and switching the control voltage to a second target voltage provided by a second charging pump circuit.

公开(公告)号：US20200265206A1

公开(公告)日：2020-08-20

申请号：US16531126

申请日：2019-08-05

Applicant: Novatek Microelectronics Corp.

Inventor： Jung-Chen Chung ,  Chi-Ting Chen

IPC: G06K9/00 ,  G06F21/32

Abstract: A fingerprint and proximity sensing apparatus for fingerprint recognizing and proximity sensing is provided. The fingerprint and proximity sensing apparatus includes a display panel, a fingerprint sensor, and at least one proximity sensing light emitting diode. The fingerprint sensor has an optical sensing array. The optical sensing array is configured to receive a first light emitted from the display panel and a second light emitted from the at least one proximity sensing light emitting diode at different time periods. The first light and the second light have different ranges of wave length. A sensing process is also provided.

公开(公告)号：US11906713B2

公开(公告)日：2024-02-20

申请号：US16885302

申请日：2020-05-28

Applicant: NOVATEK Microelectronics Corp.

Inventor： Feng-Jung Kuo ,  Min Huang ,  Jung-Chung Lee ,  Chi-Ting Chen ,  Li-Yuan Chang ,  I-Hsiu Chen ,  Chin-Hui Huang

IPC: G02B13/14 ,  G02B6/00 ,  G02B1/11 ,  G02B5/20 ,  G02B7/02 ,  G02B5/00 ,  F21V8/00

CPC classification number: G02B13/14 ,  G02B1/11 ,  G02B5/005 ,  G02B5/208 ,  G02B6/00 ,  G02B7/02 ,  G02B6/0001

Abstract: An optical fingerprint sensing module includes an image sensing device, a light source and a light shielding structure. The image sensing device is configured to sense light transmitted from a fingerprint of a finger on a display panel. The image sensing device includes a light sensing plane having a first geometric center. The light source includes a light emitting plane having a second geometric center. The first geometric center is separated from the second geometric center by a distance from 2 mm to 20 mm. The light shielding structure is disposed between the image sensing device and the light source. In examples, the optical fingerprint sensing module further includes a field angle controller to constrain light pass there through with a field angle of 5-60 degrees. A display device including an optical fingerprint sensing module is disclosed herein as well.

公开(公告)号：US11762507B2

公开(公告)日：2023-09-19

申请号：US17880683

申请日：2022-08-04

Applicant: Novatek Microelectronics Corp.

Inventor： Min Huang ,  Jung-Yu Tsai ,  Chi-Ting Chen

IPC: G06F3/041 ,  G06V40/13 ,  G06F3/042 ,  G06F21/32 ,  H03M1/12

CPC classification number: G06F3/04182 ,  G06F3/042 ,  G06F3/0412 ,  G06F3/0421 ,  G06F21/32 ,  G06V40/1318 ,  H03M1/12

Abstract: A fingerprint sensing device that includes an analog-front-end (AFE) circuit, an analog-to-digital converter (ADC) and a correction circuit is introduced. The AFE circuit generates an image signal, and the ADC converts the image signal to an output digital code. The correction circuit receives a plurality of first output digital codes that are generated by performing a plurality of first fingerprint sensing operations in a plurality of first exposure time periods. The correction circuit is further configured to calculate a second exposure time period for a second fingerprint sensing operation according to the first output digital codes and the first exposure time periods, wherein the fingerprint sensing device performs the second fingerprint operation in the second exposure time period to generate a second output digital code.

公开(公告)号：US11620850B1

公开(公告)日：2023-04-04

申请号：US17892106

申请日：2022-08-21

Applicant: Novatek Microelectronics Corp.

Inventor： Chun-Yen Lin ,  Chi-Ting Chen

IPC: G06V40/13 ,  G06F3/041

Abstract: A fingerprint sensing device and a driving method for a fingerprint sensing panel thereof are provided. The driving method includes: detecting whether a finger touch occurs on the fingerprint sensing panel; during a period of the finger touch, switching the brightness mode of the fingerprint sensing panel from a normal brightness mode to a high brightness mode so as to sense a fingerprint; driving the fingerprint sensing panel to sense the fingerprint before a mode switching time point at which the brightness mode of the fingerprint sensing panel is switched to the high brightness mode. The fingerprint sensing panel includes a pixel row, wherein the pixel row is subjected to a reset, an exposure period and a sampling in sequence to output a row sensing result, the reset is earlier than the mode switching time point, and the sampling is later than the mode switching time point.