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公开(公告)号：US11726616B2
公开(公告)日：2023-08-15
申请号：US17738590
申请日：2022-05-06
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Hung-Kai Chen , Feng-Lin Chan
IPC: G06F3/041
CPC classification number: G06F3/04184
Abstract: A touch control circuit, display-and-touch system, touch panel and touch sensing method are disclosed. The system includes a display panel, a touch panel having a plurality of touch sensors, a touch control circuit and at least one interference sensing capacitor configured to be insensitive to a touch on the touch panel and interference other than the interference from an interference layer of the display panel, the touch control circuit includes: at least one interference sensing channel configured to receive an interference sensing signal from the at least one interference sensing capacitor; and a plurality of touch sensing channels configured to receive touch sensing signals from at least part of touch sensors of the plurality of touch sensors; wherein a first electrode of each interference sensing capacitor is connected with the interference layer of the display panel, and a second electrode thereof is connected with a corresponding interference sensing channel.
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公开(公告)号：US11250232B2
公开(公告)日：2022-02-15
申请号：US16789448
申请日：2020-02-13
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hung-Kai Chen , Ting-Hsuan Hung , Chih-Yuan Chang , Feng-Lin Chan
IPC: G06K9/00
Abstract: A fingerprint detecting system comprises a fingerprint module, for receiving a fingerprint driving signal and performing a frequency modulation on the fingerprint driving signal, to correspondingly outputting a fingerprint signal with a first frequency based on the fingerprint driving signal, and a signal processing circuit, coupled to the fingerprint module, for receiving the fingerprint signal with the first frequency, performing a frequency demodulation to shift the first frequency of the fingerprint signal to a second frequency, and filtering the fingerprint signal with the second frequency based on the first frequency, whereby the filtered fingerprint signal is used for a fingerprint data analysis.
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公开(公告)号：US20210255752A1
公开(公告)日：2021-08-19
申请号：US17211864
申请日：2021-03-25
Applicant: Novatek Microelectronics Corp.
Inventor： Hung-Kai Chen , Yu-Huang Chen , Feng-Lin Chan
Abstract: An analog front-end circuit for a touch controller and an operating method thereof are provided. The analog front-end circuit includes an analog front-end, a first switch and a second switch. The analog front-end includes an input terminal and an output terminal. The first switch includes a first terminal and a second terminal. The first terminal of the first switch is coupled to the input terminal of the analog front-end, and the second terminal of the first switch is coupled to a panel routing. The second switch includes a first terminal and a second terminal. The first terminal of the second switch is coupled to the second terminal of the first switch, and the second terminal of the second switch is coupled to a reference voltage.
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公开(公告)号：US11995269B2
公开(公告)日：2024-05-28
申请号：US18123672
申请日：2023-03-20
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Hung-Kai Chen , Yu-Huang Chen , Feng-Lin Chan
CPC classification number: G06F3/04184 , G06F3/0412 , G06F3/04164 , G06F3/0446
Abstract: A touch sensing method, apparatus for a touch panel, and electronic device are provided. The method includes: determining a first number of to-sense touch sensing circuits, and determining a second number of reference touch sensing circuits, each to-sense touch sensing circuit having a corresponding reference touch sensing circuit; causing each to-sense touch sensing circuit to receive a touch excitation signal TX1, and apply TX1 to a corresponding touch sensitive cell and receive a touch sensing signal therefrom, and output a first output signal; causing each reference touch sensing circuit to receive a touch reference signal DC/TX2, and apply DC/TX2 to a corresponding touch sensitive cell and receive a reference sensing signal therefrom, wherein DC/TX2 and TX1 are different signals; and obtaining, according to respective first and second output signals, a capacitance difference of capacitances sensed by each to-sense touch sensing circuit and its corresponding reference touch sensing circuit.
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公开(公告)号：US11635853B2
公开(公告)日：2023-04-25
申请号：US17330058
申请日：2021-05-25
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Hung-Kai Chen , Yu-Huang Chen , Feng-Lin Chan
Abstract: A touch sensing method, apparatus for a touch panel, and electronic device are provided. The method includes: determining a first number of to-sense touch sensing circuits, and determining a second number of reference touch sensing circuits, each to-sense touch sensing circuit having a corresponding reference touch sensing circuit; causing each to-sense touch sensing circuit to receive a touch excitation signal TX1, and apply TX1 to a corresponding touch sensitive cell and receive a touch sensing signal therefrom, and output a first output signal; causing each reference touch sensing circuit to receive a touch reference signal DC/TX2, and apply DC/TX2 to a corresponding touch sensitive cell and receive a reference sensing signal therefrom, wherein DC/TX2 and TX1 are different signals; and obtaining, according to respective first and second output signals, a capacitance difference of capacitances sensed by each to-sense touch sensing circuit and its corresponding reference touch sensing circuit.
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Patent Agency Ranking
公开(公告)号：US11507221B2
公开(公告)日：2022-11-22
申请号：US17211864
申请日：2021-03-25
Applicant: Novatek Microelectronics Corp.
Inventor： Hung-Kai Chen , Yu-Huang Chen , Feng-Lin Chan
Abstract: An analog front-end circuit for a touch controller and an operating method thereof are provided. The analog front-end circuit includes an analog front-end, a first switch and a second switch. The analog front-end includes an input terminal and an output terminal. The first switch includes a first terminal and a second terminal. The first terminal of the first switch is coupled to the input terminal of the analog front-end, and the second terminal of the first switch is coupled to a panel routing. The second switch includes a first terminal and a second terminal. The first terminal of the second switch is coupled to the second terminal of the first switch, and the second terminal of the second switch is coupled to a reference voltage.
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公开(公告)号：US20210373738A1
公开(公告)日：2021-12-02
申请号：US17330058
申请日：2021-05-25
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Hung-Kai Chen , Yu-Huang Chen , Feng-Lin Chan
Abstract: A touch sensing method, apparatus for a touch panel, and electronic device are provided. The method includes: determining a first number of to-sense touch sensing circuits, and determining a second number of reference touch sensing circuits, each to-sense touch sensing circuit having a corresponding reference touch sensing circuit; causing each to-sense touch sensing circuit to receive a touch excitation signal TX1, and apply TX1 to a corresponding touch sensitive cell and receive a touch sensing signal therefrom, and output a first output signal; causing each reference touch sensing circuit to receive a touch reference signal DC/TX2, and apply DC/TX2 to a corresponding touch sensitive cell and receive a reference sensing signal therefrom, wherein DC/TX2 and TX1 are different signals; and obtaining, according to respective first and second output signals, a capacitance difference of capacitances sensed by each to-sense touch sensing circuit and its corresponding reference touch sensing circuit.
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公开(公告)号：US20210256236A1
公开(公告)日：2021-08-19
申请号：US16790636
申请日：2020-02-13
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hung-Kai Chen , Ting-Hsuan Hung , Chih-Yuan Chang , Feng-Lin Chan
IPC: G06K9/00
Abstract: A fingerprint detecting system comprises a fingerprint module, for detecting a fingerprint of a user and outputting a current signal according to the detected fingerprint, and a signal processing circuit, coupled to the fingerprint module, for receiving the current signal from the fingerprint module, performing a offset cancellation for the current signal to remove an offset of the current signal, and converting the current signal without the offset to a voltage signal for fingerprint data analysis.
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公开(公告)号：US11953523B2
公开(公告)日：2024-04-09
申请号：US17539170
申请日：2021-11-30
Applicant: NOVATEK Microelectronics Corp.
Inventor： Tzu-Wei Lin , Hung-Kai Chen , Feng-Lin Chan
CPC classification number: G01R1/30 , H03G3/30 , H03G2201/103
Abstract: An analog front-end (AFE) circuit, configured to be coupled to a sensor having a plurality of sensing units, includes a plurality of sensing circuits and a plurality of multiplexers. Each of the plurality of multiplexers is coupled between one of the plurality of sensing units and at least two of the plurality of sensing circuits.
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公开(公告)号：US20230229263A1
公开(公告)日：2023-07-20
申请号：US18123672
申请日：2023-03-20
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Hung-Kai Chen , Yu-Huang Chen , Feng-Lin Chan
CPC classification number: G06F3/04184 , G06F3/04164 , G06F3/0446 , G06F3/0412
Abstract: A touch sensing method, apparatus for a touch panel, and electronic device are provided. The method includes: determining a first number of to-sense touch sensing circuits, and determining a second number of reference touch sensing circuits, each to-sense touch sensing circuit having a corresponding reference touch sensing circuit; causing each to-sense touch sensing circuit to receive a touch excitation signal TX1, and apply TX1 to a corresponding touch sensitive cell and receive a touch sensing signal therefrom, and output a first output signal; causing each reference touch sensing circuit to receive a touch reference signal DC/TX2, and apply DC/TX2 to a corresponding touch sensitive cell and receive a reference sensing signal therefrom, wherein DC/TX2 and TX1 are different signals; and obtaining, according to respective first and second output signals, a capacitance difference of capacitances sensed by each to-sense touch sensing circuit and its corresponding reference touch sensing circuit.
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