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

IPC: G06F3/041 ,  G06F3/044

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.

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

IPC: G06F3/041 ,  G06F3/044

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.

公开(公告)号：US11531428B2

公开(公告)日：2022-12-20

申请号：US17731785

申请日：2022-04-28

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chun-Hung Chen ,  Kai-Wen Shao ,  Feng-Lin Chan ,  Shuo-Wen Jang

IPC: G06F3/041 ,  G09G3/3233 ,  G06F3/044 ,  G09G3/3208

Abstract: The disclosure provides a method for driving an OLED touch-and-display device, a driving circuit, and an OLED touch-and-display device. The method includes: generating gate driving signals that are sequentially shifted based on the first clock signal (GCK); sequentially applying the gate driving signals that are sequentially shifted to the plurality of GLs; writing display data in a display driving period for each row of pixels, to the row of pixels, wherein a time length of the display driving period depends on a corresponding gate driving signal and is smaller than the clock cycle; and for a display driving period for each of at least one row of pixels, setting a touch detection period corresponding to the display driving period or corresponding to the display driving period for previous row of pixels at least partially overlapping with the display driving period in time.

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.

公开(公告)号：US20230221820A1

公开(公告)日：2023-07-13

申请号：US18122540

申请日：2023-03-16

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Yu-Huang Chen ,  Feng-Lin Chan

IPC: G06F3/041

CPC classification number: G06F3/04166 ,  G06F3/0418 ,  G06F3/0446

Abstract: A touch sensing method for a touch panel and an electronic device are provided. The touch panel includes touch sensing units. The touch sensing method includes: in a first sensing period, applying touch excitation signals to a first group of the touch sensing units to obtain first touch sensing signals; applying touch reference signals to a second group of the touch sensing units to obtain a first reference sensing signal; in a second sensing period, applying the touch excitation signals to the second group of the touch sensing units to obtain second touch sensing signals; applying the touch reference signal to the first group of the touch sensing units to obtain a second reference sensing signal; and acquiring capacitance values of the touch sensing units according to the first touch sensing signals, the first reference sensing signal, the second touch sensing signals, and the second reference sensing signal.

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.

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

IPC: G06F3/041 ,  G06F3/044

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.

公开(公告)号：US11650692B2

公开(公告)日：2023-05-16

申请号：US17331197

申请日：2021-05-26

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Yu-Huang Chen ,  Feng-Lin Chan

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/04166 ,  G06F3/044

Abstract: A touch sensing method for a touch panel and an electronic device are provided. The touch sensing method includes: selecting a portion of multiple touch sensing units as to-sense touch sensing units, applying first touch excitation signals to the those to obtain multiple first touch sensing signals, and obtaining multiple differential sensing signals based on multiple first touch sensing signals; selecting a touch sensing unit as a reference touch sensing unit, and applying a touch reference signal to it to obtain a reference sensing signal; selecting a to-sense touch sensing unit as a preprocessing touch sensing unit, and applying a second touch excitation signal to it to obtain a second touch sensing signal; obtaining a capacitance sensing signal from the reference sensing signal and the second touch sensing signal; and acquiring capacitance values of multiple to-sense touch sensing units according to the differential sensing signals and the capacitance sensing signal.

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

IPC: G06F3/041 ,  G06F3/044

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.

公开(公告)号：US20220326834A1

公开(公告)日：2022-10-13

申请号：US17731785

申请日：2022-04-28

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chun-Hung Chen ,  Kai-Wen Shao ,  Feng-Lin Chan ,  Shuo-Wen Jang

IPC: G06F3/041 ,  G09G3/3233 ,  G06F3/044 ,  G09G3/3208

Abstract: The disclosure provides a method for driving an OLED touch-and-display device, a driving circuit, and an OLED touch-and-display device. The method includes: generating gate driving signals that are sequentially shifted based on the first clock signal (GCK); sequentially applying the gate driving signals that are sequentially shifted to the plurality of GLs; writing display data in a display driving period for each row of pixels, to the row of pixels, wherein a time length of the display driving period depends on a corresponding gate driving signal and is smaller than the clock cycle; and for a display driving period for each of at least one row of pixels, setting a touch detection period corresponding to the display driving period or corresponding to the display driving period for previous row of pixels at least partially overlapping with the display driving period in time.