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    Timing control circuit and operation method thereof
    51.
    发明授权
    Timing control circuit and operation method thereof 有权

    公开(公告)号：US11823637B2

    公开(公告)日：2023-11-21

    申请号：US17564253

    申请日：2021-12-29

    Applicant: Novatek Microelectronics Corp.

    Inventor： Yi-Tsung Lin ,  Yen-Tao Liao

    IPC: G09G3/36

    CPC classification number: G09G3/3614 ,  G09G3/3688 ,  G09G2310/08

    Abstract: A timing control circuit is provided to control a data voltage outputted to a pixel array of a display panel during a frame period to perform a polarity reversal every N scan lines, where N is a positive integer. The timing control circuit includes a receiver and an adjustment circuit. The receiver is configured to sequentially receive first display data and second display data for one data line of the display panel. The adjustment circuit is coupled to the receiver to adjust at least one of gray information of the second display data and charging time of the second display data according to a voltage polarity of the first display data and a voltage polarity of the second display data. A corresponding operation method of the timing control circuit is also provided.

    Driving method of active stylus and related driving device
    52.
    发明授权
    Driving method of active stylus and related driving device 有权

    公开(公告)号：US11822745B2

    公开(公告)日：2023-11-21

    申请号：US17891628

    申请日：2022-08-19

    Applicant: NOVATEK MICROELECTRONICS CORP.

    Inventor： Hao-Wei Cheng ,  Cheng-Wei Pan

    IPC: G06F3/041 ,  G06F3/044 ,  G06F3/0354

    CPC classification number: G06F3/0418 ,  G06F3/03545 ,  G06F3/0441 ,  G06F3/0442 ,  G06F3/04166

    Abstract: Provided are a driving method of a touch display panel, a driving circuit and a touch display device. The driving method includes: obtaining a touch position of an active stylus; determining a first region on the touch display panel based on the touch position of the active stylus; and transmitting an uplink (UL) signal to touch sensing electrodes in the first region and transmitting an anti-interference signal to the touch sensing electrodes in at least a part of the region except for the first region on the touch display panel during an UL transmission period, wherein the UL signal transmitted to the touch sensing electrodes in the first region during the UL transmission period is for transmission to the active stylus.

    Display driver and displaying method for cascade application
    53.
    再颁专利
    Display driver and displaying method for cascade application 有权

    公开(公告)号：USRE49726E1

    公开(公告)日：2023-11-14

    申请号：US17546063

    申请日：2021-12-09

    Applicant: Novatek Microelectronics Corp.

    Inventor： Jen-Wei Li ,  Jen-Hao Liao

    IPC: G09G3/20 ,  G09G3/36

    CPC classification number: G09G3/20 ,  G09G3/3685 ,  G09G2310/027 ,  G09G2310/0243 ,  G09G2310/0291 ,  G09G2310/0297 ,  G09G2320/0276 ,  G09G2320/0673 ,  G09G2330/028

    Abstract: A display driver that includes a first driver integrated circuit being cascaded to a second driver integrated circuit is introduced. The first driver integrated circuit includes a first gamma voltage generator that is configured to output a plurality of first gamma voltages to output terminals of the first gamma voltage generator. The second driver integrated circuit includes a second gamma voltage generator that is configured to output a plurality of second gamma voltages to output terminals of the second gamma voltage generator. Each of the output terminals of the first gamma voltage generator is corresponded to one of the output terminals of the second gamma voltage generator. At least one of the output terminals of the first gamma voltage generator is electrically coupled to the corresponding one of the output terminals of the second gamma voltage generator to output at least one common gamma voltage of the first gamma voltages and the second gamma voltages. A method adapted to the display driver is also introduced.

    Data receiver for achieving functions of level shifter and amplifier circuit
    54.
    发明授权
    Data receiver for achieving functions of level shifter and amplifier circuit 有权

    公开(公告)号：US11749168B1

    公开(公告)日：2023-09-05

    申请号：US17857154

    申请日：2022-07-04

    Applicant: Novatek Microelectronics Corp.

    Inventor： Ho-Chun Chang ,  Che-Wei Yeh ,  Yu-Hsiang Wang ,  Keko-Chun Liang

    IPC: G09G3/20

    CPC classification number: G09G3/2092 ,  G09G2300/0838 ,  G09G2310/0289

    Abstract: The disclosure provides a data receiver, including a first capacitor, a second capacitor, a first inverter and a second inverter. The first capacitor has a first terminal and a second terminal, and the first terminal receives a first input signal. The second capacitor has a third terminal and a fourth terminal, and the third terminal receives a second input signal. The first inverter has a first input terminal and a first output terminal. The second inverter has a second input terminal and a second output terminal. The first input terminal and the second output terminal are coupled to the second terminal of the first capacitor, and the second input terminal and the first output terminal are coupled to the fourth terminal of the second capacitor. The first output terminal generates a first output signal with a first output voltage, and the second output terminal generates a second output signal with a second output voltage.

    Optical fingerprint sensing apparatus, driver apparatus thereof and operation method
    55.
    发明授权
    Optical fingerprint sensing apparatus, driver apparatus thereof and operation method 有权

    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

    IPC: G06V40/13 ,  G06F3/042 ,  G06F3/041

    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.

    Image processing device and image processing method thereof
    57.
    发明授权
    Image processing device and image processing method thereof 有权

    公开(公告)号：US11741636B2

    公开(公告)日：2023-08-29

    申请号：US16987410

    申请日：2020-08-07

    Applicant: Novatek Microelectronics Corp.

    Inventor： Hui-Yu Jiang ,  Heng-Yao Lin ,  Yen-Tao Liao

    IPC: G06T9/20 ,  G06T5/00 ,  G06T5/50

    CPC classification number: G06T9/20 ,  G06T5/002 ,  G06T5/009 ,  G06T5/50 ,  G06T2207/20192

    Abstract: An image processing method including the following steps is provided. An image information of an image is received, wherein the image includes a plurality of blocks and the image information includes a plurality of pixel information of each block. A dual gamma correction is performed on a first group of blocks of the image to obtain one or more corrected blocks and the dual gamma correction is skipped on a second group of blocks of the image to obtain a plurality of uncorrected blocks. A first encoding process is performed on the one or more corrected blocks to obtain a plurality of first encoded blocks. A second encoding process different from the first encoding process is performed on the plurality of uncorrected blocks to obtain a plurality of second encoded blocks.

    TOUCH SENSING METHOD, TOUCH SENSING APPARATUS AND ELECTRONIC DEVICE
    59.
    发明公开
    TOUCH SENSING METHOD, TOUCH SENSING APPARATUS AND ELECTRONIC DEVICE 审中-公开

    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

    IPC: G06F3/041 ,  G06F3/044

    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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