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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.
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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.
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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.
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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.
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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.
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Patent Agency Ranking
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
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.
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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
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.
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公开(公告)号：US11798314B1
公开(公告)日：2023-10-24
申请号：US18112119
申请日：2023-02-21
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Min Huang , Chi-Ting Chen
IPC: G06V40/13 , G06V10/141 , G06V10/98 , G06F3/041
CPC classification number: G06V40/1318 , G06V10/141 , G06V10/98 , G06F3/041
Abstract: Embodiments of the present disclosure provide a fingerprint identification method, apparatus, and an electronic product. The method comprises: acquiring a touch signal of a finger to be identified on a display component; determining a touch zone; determining a fingerprint identification bright zone and a fingerprint identification dark zone on the display component based on the touch zone, wherein the fingerprint identification dark zone is close to and at least partially surrounds the fingerprint identification bright zone; and performing a fingerprint identification of the finger to be identified based on a bright zone fingerprint detection signal corresponding to the fingerprint identification bright zone and a dark zone fingerprint detection signal corresponding to the fingerprint identification dark zone. The interference during under-screen fingerprint identification can be effectively reduced and the accuracy of under-screen fingerprint identification can be improved through the fingerprint identification method of the present disclosure.
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公开(公告)号：US20230230412A1
公开(公告)日：2023-07-20
申请号：US17880683
申请日：2022-08-04
Applicant: Novatek Microelectronics Corp.
Inventor： Min Huang , Jung-Yu Tsai , Chi-Ting Chen
CPC classification number: 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.
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公开(公告)号：US11503242B2
公开(公告)日：2022-11-15
申请号：US17168201
申请日：2021-02-05
Applicant: Novatek Microelectronics Corp.
Inventor： Chi-Ting Chen
Abstract: A readout integrated circuit configured to read out sensing signals from an optical sensing panel including a sensor array for fingerprint sensing is provided. The readout integrated circuit includes a plurality of input terminals, a comparator circuit and a control circuit. The plurality of input terminals are configured to be coupled to a plurality of output terminals of the optical sensing panel. The comparator circuit is configured to receive an output voltage from an output terminal of the plurality of output terminals of the optical sensing panel and at least one reference voltage, compare the output voltage to the at least one reference voltage and output a comparison result. The control circuit is coupled to the comparator circuit. The control circuit is configured to receive the comparison result and determine a supplementary charge amount to be charged to or discharged from the output terminal according to the comparison result.
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