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公开(公告)号：US11436855B2
公开(公告)日：2022-09-06
申请号：US17110327
申请日：2020-12-03
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Ping Liu , Chi-Ting Chen
Abstract: A method for performing fingerprint sensing is introduced. The method includes performing a predetermined number of consecutive fingerprint sensing cycles; informing a processing unit that a fingerprint sensing driver is ready for providing pre-scanned fingerprint data after each cycle of a fingerprint sensing cycle set, wherein the fingerprint sensing cycle set includes at least one of the fingerprint sensing cycles except for a last one of the fingerprint sensing cycles; and providing the processing unit with the pre-scanned fingerprint data obtained from the each cycle of the fingerprint sensing cycle set. An electronic module capable of performing fingerprint sensing and a computing apparatus capable of performing the same are also provided.
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公开(公告)号：US20210250537A1
公开(公告)日：2021-08-12
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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公开(公告)号：US20200381466A1
公开(公告)日：2020-12-03
申请号：US16423150
申请日：2019-05-27
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chi-Ting Chen , Shao-Yang Chiang
IPC: H01L27/146 , H04N5/341 , H04N5/235 , H04N5/3745
Abstract: The present invention provides a method of obtaining image data for an image sensing system. The image sensing system includes a sensing area having a plurality of sensing pixels. The method includes the steps of: scanning at least two groups of sensing pixels among the plurality of sensing pixels with at least two integration times, respectively, to obtain a plurality of sensing results; obtaining a selected integration time from one of the at least two integration times according to the plurality of sensing results; and scanning the plurality of sensing pixels except for the at least two groups of sensing pixels with the selected integration time, to obtain the image data.
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公开(公告)号：US10762182B2
公开(公告)日：2020-09-01
申请号：US15436875
申请日：2017-02-20
Applicant: NOVATEK Microelectronics Corp.
Inventor： Sheng-Ruei Hsu , Chi-Ting Chen
IPC: G06F21/32 , G06F3/044 , G06K9/00 , G06F3/0338
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：US10706250B2
公开(公告)日：2020-07-07
申请号：US15993613
申请日：2018-05-31
Applicant: Novatek Microelectronics Corp.
Inventor： Chi-Ting Chen
Abstract: A capacitive image sensing device is provided. The capacitive image sensing device includes a first charge amplifier, a second charge amplifier and a differential amplifier. The first charge amplifier is coupled to one of sensing electrodes of a sensor array. The differential amplifier has a first input terminal, a second input terminal and a differential output terminal pair. The first input terminal of the differential amplifier is coupled to the first charge amplifier. The second input terminal of the differential amplifier is coupled to the second charge amplifier.
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Patent Agency Ranking
公开(公告)号：US20180349666A1
公开(公告)日：2018-12-06
申请号：US15993613
申请日：2018-05-31
Applicant: Novatek Microelectronics Corp.
Inventor： Chi-Ting Chen
Abstract: A capacitive image sensing device is provided. The capacitive image sensing device includes a first charge amplifier, a second charge amplifier and a differential amplifier. The first charge amplifier is coupled to one of sensing electrodes of a sensor array. The differential amplifier has a first input terminal, a second input terminal and a differential output terminal pair. The first input terminal of the differential amplifier is coupled to the first charge amplifier. The second input terminal of the differential amplifier is coupled to the second charge amplifier.
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公开(公告)号：US20240397231A1
公开(公告)日：2024-11-28
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
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：US11830280B1
公开(公告)日：2023-11-28
申请号：US17869773
申请日：2022-07-20
Applicant: NOVATEK Microelectronics Corp.
Inventor： Jung-Chen Chung , Chi-Ting Chen , Jung-Yu Tsai
CPC classification number: G06V40/1318 , G06F3/0418 , G06F3/04166
Abstract: An image processing circuit for controlling a panel is configured to: receive information of a fixed pattern noise (FPN) corresponding to a first sensing zone of the panel, wherein the first sensing zone is determined according to a touch position of a finger; scan the first sensing zone to perform fingerprint sensing on the finger, to receive a plurality of raw sensing signals; remove the FPN from the plurality of raw sensing signals to generate a plurality of modified sensing signals; and output a plurality of fingerprint data to a host for fingerprint recognition, wherein the plurality of fingerprint data are converted from the plurality of modified sensing signals.
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公开(公告)号：US11749014B2
公开(公告)日：2023-09-05
申请号：US17394329
申请日：2021-08-04
Applicant: Novatek Microelectronics Corp.
Inventor： Jung-Chen Chung , Chi-Ting Chen
CPC classification number: G06V40/1318 , G06F3/0412 , G06F3/0421
Abstract: An optical fingerprint sensing apparatus, a driver apparatus, and an operation method are provided. The driver apparatus includes a display driving device and a fingerprint sensing driving device. The display driving device drives the display panel to display different frames with different luminances, and the different frames are used to generate at least one of different transmitted light intensities and different reflected light intensities. The fingerprint sensing driving device drives the display panel to perform a fingerprint capturing operation to capture a plurality of different fingerprint images of a finger under the at least one of the different transmitted light intensities and the different reflected light intensities. The different fingerprint images are processed to generate a processed fingerprint image.
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公开(公告)号：US11551472B1
公开(公告)日：2023-01-10
申请号：US17749096
申请日：2022-05-19
Applicant: NOVATEK Microelectronics Corp.
Inventor： Ping Liu , Chi-Ting Chen
Abstract: A method of fingerprint recognition for a fingerprint sensing circuit includes steps of: performing a first fingerprint sensing process including a first exposure operation and a first readout operation under a first light spot setting; and performing a second fingerprint sensing process including a second exposure operation and a second readout operation under a second light spot setting. Wherein, a host performs a first fingerprint recognition in response to the first fingerprint sensing process; and wherein, the second light spot setting and the first fingerprint recognition are performed simultaneously.
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