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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
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.
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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
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.
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公开(公告)号：US11023701B2
公开(公告)日：2021-06-01
申请号：US16425887
申请日：2019-05-29
Applicant: NOVATEK Microelectronics Corp.
Inventor： Kuo-Wei Cheng , Min Huang
Abstract: A signal processing circuit for processing a sensing signal from a sensing circuit includes a plurality of input capacitors, an amplifier, an input switch group, a plurality of storage capacitors and a plurality of storage control switches. The plurality of input capacitors are configured to receive the sensing signal from one of a differential input nodes of the signal processing circuit and couple the sensing signal to a plurality of floating nodes. The amplifier, coupled to the plurality of floating nodes, is configured to amplify the sensing signal coupled from the plurality of floating nodes. The input switch group is coupled between the plurality of floating nodes and the plurality of input capacitors. The plurality of storage control switches, coupled between the plurality of floating nodes and the plurality of storage capacitors, are configured to couple offset information of the plurality of input capacitors to the plurality of storage capacitors.
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公开(公告)号：US20200343864A1
公开(公告)日：2020-10-29
申请号：US16393942
申请日：2019-04-24
Applicant: NOVATEK Microelectronics Corp.
Inventor： Min Huang
Abstract: A signal processing circuit, which has a pair of input nodes and a pair of output nodes, includes a first switch pair, a second switch pair, an amplifier, a first compensation capacitor and a second compensation capacitor. The first switch pair is coupled between the pair of input nodes and a plurality of floating nodes. The second switch pair is coupled between the plurality of floating nodes and the pair of output nodes. The amplifier is coupled between the plurality of floating nodes and the pair of output nodes. The first compensation capacitor is coupled between a first floating node among the plurality of floating nodes and a first output node among the pair of output nodes. The second compensation capacitor is coupled between a second floating node among the plurality of floating nodes and the first output node.
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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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Patent Agency Ranking
公开(公告)号：US11443546B1
公开(公告)日：2022-09-13
申请号：US17233570
申请日：2021-04-19
Applicant: NOVATEK Microelectronics Corp.
Inventor： Min Huang
Abstract: A fingerprint sensing signal correction method for a fingerprint sensing signal correction device including a plurality of fingerprint sensors integrated inside of a display panel of an electronic device is disclosed. The method includes obtaining a plurality of environmental voltages of the display panel during a pre-scanning mode; generating a plurality of correction voltages associated with the plurality of environmental voltages during a signal processing mode; and canceling the plurality of environmental voltages from a plurality of amplified sensing voltages to generate a plurality of corrected sensing voltages during a normal mode.
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公开(公告)号：US11301708B2
公开(公告)日：2022-04-12
申请号：US17015085
申请日：2020-09-09
Applicant: NOVATEK Microelectronics Corp.
Inventor： Jung-Chen Chung , Jen-Yi Lin , Min Huang
Abstract: An image sensing circuit includes a plurality of readout circuits and a pre-charge control circuit. Each of the readout circuits is coupled to a sensing line among a plurality of sensing lines and configured to receive a sensing voltage among a plurality of sensing voltages through the corresponding sensing line, wherein at least one of the readout circuits is further configured to receive at least one first pre-scan voltage through the corresponding sensing line prior to reception of the sensing voltage. The pre-charge control circuit, coupled to the readout circuits, is configured to perform a plurality of steps. The steps include receiving the at least one first pre-scan voltage from the at least one readout circuit; calculating a first pre-charge voltage according to the at least one first pre-scan voltage; and pre-charging the sensing lines to the first pre-charge voltage before the readout circuits receive the sensing voltages.
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公开(公告)号：US20210142085A1
公开(公告)日：2021-05-13
申请号：US16676446
申请日：2019-11-07
Applicant: NOVATEK Microelectronics Corp.
Inventor： Min Huang
Abstract: An image processing method includes the steps of: receiving a plurality of original image signals from an image sensor; modifying the plurality of original image signals based on a lens pattern, to generate a plurality of first image signals; obtaining compensation information of the plurality of first image signals; determining whether the plurality of first image signals match with a predetermined image pattern; modifying the plurality of first image signals according to the compensation information to generate a plurality of second image signals when the plurality of first image signals are determined to not match with the predetermined image pattern; and determining whether the plurality of second image signals match with the predetermined image pattern.
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公开(公告)号：US20210097318A1
公开(公告)日：2021-04-01
申请号：US17015085
申请日：2020-09-09
Applicant: NOVATEK Microelectronics Corp.
Inventor： Jung-Chen Chung , Jen-Yi Lin , Min Huang
Abstract: An image sensing circuit includes a plurality of readout circuits and a pre-charge control circuit. Each of the readout circuits is coupled to a sensing line among a plurality of sensing lines and configured to receive a sensing voltage among a plurality of sensing voltages through the corresponding sensing line, wherein at least one of the readout circuits is further configured to receive at least one first pre-scan voltage through the corresponding sensing line prior to reception of the sensing voltage. The pre-charge control circuit, coupled to the readout circuits, is configured to perform a plurality of steps. The steps include receiving the at least one first pre-scan voltage from the at least one readout circuit; calculating a first pre-charge voltage according to the at least one first pre-scan voltage; and pre-charging the sensing lines to the first pre-charge voltage before the readout circuits receive the sensing voltages.
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公开(公告)号：US20190294277A1
公开(公告)日：2019-09-26
申请号：US16439719
申请日：2019-06-13
Applicant: NOVATEK Microelectronics Corp.
Inventor： Min Huang
Abstract: A signal processing circuit for processing a sensing signal from a sensor includes an amplifier, an input capacitor group, a compensation capacitor group and first/second switch groups. The amplifier, coupled to a first floating node and a second floating node, is configured to amplify the sensing signal coupled from the first floating node and the second floating node. The first switch group is coupled between a first node group and the first and second floating nodes. The second switch group is coupled between a second node group and the first node group. The input capacitor group is coupled to the second node group and an input node group, and configured to receive the sensing signal coupled from the input node group. The compensation capacitor group is coupled between a compensation node group and the second node group, and configured to receive a compensation signal coupled from the compensation node group.
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