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公开(公告)号：US11503241B2
公开(公告)日：2022-11-15
申请号：US17168185
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 is provided. The optical sensing panel includes a sensor array for fingerprint sensing. The readout integrated circuit includes a plurality of input terminals, a first discharging 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 first discharging circuit is coupled to one of the plurality of input terminals. The first discharging circuit is configured to discharge one of 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 control circuit is coupled to the first discharging circuit. The control circuit is configured to output at least one control signal to control an operating period of the first discharging circuit.
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公开(公告)号：US11301665B2
公开(公告)日：2022-04-12
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：US11113376B2
公开(公告)日：2021-09-07
申请号：US16907117
申请日：2020-06-19
Applicant: NOVATEK Microelectronics Corp.
Inventor： Sheng-Ruei Hsu , Chi-Ting Chen
IPC: G06F21/32 , G06F3/0488 , G06K9/00
Abstract: The present invention discloses a method of finger touch authentication through a fingerprint sensor. The method includes obtaining a plurality of touch operations through the fingerprint sensor, detecting a pattern of the plurality of touch operations; comparing the pattern with a registered pattern to generate a comparison result, and authenticating the plurality of touch operations on the basis of the comparison result, wherein the pattern indicates at least one feature, and the fingerprint sensor is capable of authenticating a fingerprint of a user after or before the finger touch authentication.
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公开(公告)号：US10970512B2
公开(公告)日：2021-04-06
申请号：US16424506
申请日：2019-05-29
Applicant: NOVATEK Microelectronics Corp.
Inventor： Jung-Chen Chung , Chi-Ting Chen
Abstract: A fingerprint sensing apparatus having a large-area sensing mechanism is provided that includes at least three optical fingerprint sensing circuits and a processing circuit. The at least three optical fingerprint sensing circuits are configured to perform sensing within a plurality of sensing areas to obtain a plurality of sensed images, wherein each of the sensing areas corresponds to one of the optical fingerprint sensing circuits. The processing circuit is electrically coupled to the optical fingerprint sensing circuits to receive the sensed images and is configured to splice the sensed images together to form an integrated sensed image.
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公开(公告)号：US10755065B2
公开(公告)日：2020-08-25
申请号：US16208472
申请日：2018-12-03
Applicant: NOVATEK Microelectronics Corp.
Inventor： Yu-Tsung Wu , Chi-Ting Chen , Chih-Lun Cheng
Abstract: A sensor device includes a fingerprint sensing module, configured to sense a first raw image using a first exposure time; and an exposure time adjusting module. The exposure time adjusting module is configured to obtain a first image according to the first raw image; determine whether the first image comprises a flicker noise; and adjust the first exposure time when the first image comprises the flicker noise, so as to mitigate the flicker noise.
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Patent Agency Ranking
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.
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公开(公告)号：US20190212873A1
公开(公告)日：2019-07-11
申请号：US16243105
申请日：2019-01-09
Applicant: NOVATEK Microelectronics Corp.
Inventor： Min Huang , Chi-Ting Chen
CPC classification number: G06F3/0418 , G06F3/044 , G06K9/0002
Abstract: A signal processing circuit for receiving a sensing signal from a sensor includes a capacitor group, an amplifier and a switch. The sensing signal consists of a common-mode part and a differential-mode part. The capacitor group, coupled to a node, includes an input capacitor for coupling the sensing signal to the node and a compensation capacitor for coupling a compensation signal to the node. The amplifier, coupled to the node, is configured to amplify the sensing signal coupled from the input capacitor. The switch is coupled between the node and the amplifier.
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公开(公告)号：US12262135B2
公开(公告)日：2025-03-25
申请号：US18320998
申请日：2023-05-22
Applicant: Novatek Microelectronics Corp.
Inventor： Min Huang , Chi-Ting Chen
IPC: H04N25/772 , G06V40/13 , H04N21/44
Abstract: A pixel reading device, which includes a first capacitor, a second capacitor, a voltage generating circuit, and an analog front-end (AFE) circuit, is provided. A first terminal of the first capacitor is coupled to a fingerprint sensing pixel to receive a sensing voltage. A first terminal of the second capacitor is coupled to a second terminal of the first capacitor. The voltage generating circuit provide a compensation voltage to a second terminal of the second capacitor. During a sensing period of the fingerprint sensing pixel, the compensation voltage is at an initial level. During a level reading period of the fingerprint sensing pixel, the compensation voltage is pulled up from the initial level to a compensation level to compensate a common mode component of the sensing voltage. An input terminal of the AFE circuit is coupled to the second terminal of the first capacitor.
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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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