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    Touch device and detection method
    441.
    发明授权
    Touch device and detection method 有权

    公开(公告)号：US11803272B1

    公开(公告)日：2023-10-31

    申请号：US17889401

    申请日：2022-08-17

    Applicant: Novatek Microelectronics Corp.

    Inventor： Chih Hsien Ou ,  ChengFeng Hsieh ,  Chin-Lin Lee ,  Che-Chia Hsu

    IPC: G06F3/041 ,  G06F3/038 ,  G06F3/0354

    CPC classification number: G06F3/0418 ,  G06F3/038 ,  G06F3/03545

    Abstract: Provided is an electronic device including a touch panel, a communication unit, and a processing unit coupled to the touch control panel and the communication unit. The communication unit sends a detection signal and receives a response signal based on the detection signal. The processing unit determines an operation mode of the electronic device based on the response signal. The operation mode includes a first mode and a second mode. An input signal source of the electronic device of the first mode includes a finger. The input signal source of the second mode includes the finger and a stylus. When the response signal includes a pen-tip signal of the stylus and a pen-ring signal of the stylus, the processing unit determines whether to set the operation mode to the second mode according to the numerical relationship between the pen-tip signal and the pen-ring signal.

    Column analog-to-digital converter and local counting method thereof
    442.
    发明授权
    Column analog-to-digital converter and local counting method thereof 有权

    公开(公告)号：US11777515B2

    公开(公告)日：2023-10-03

    申请号：US17241075

    申请日：2021-04-27

    Applicant: Novatek Microelectronics Corp.

    Inventor： Chih-Peng Hsia ,  Cho-Hsuan Jhang ,  Su-Wei Lien

    IPC: H03M1/34 ,  H03M1/50 ,  H03K5/135 ,  H03K5/156 ,  H03M1/82

    CPC classification number: H03M1/508 ,  H03K5/135 ,  H03K5/1565 ,  H03M1/825

    Abstract: A column analog-to-digital converter and the local counting method is provided. The column analog-to-digital converter includes a plurality of analog-to-digital converters in parallel. Each of the analog-to-digital converters includes a comparator and a counting circuit. The comparator compares the ramp voltage with one of the plurality of column signals to generate a comparator output signal. The counting circuit generates a local clock by means of a voltage-controlled oscillator of the counting circuit according to the base clock and the comparator output signal, counts the base clock and the local clock respectively to generate a first counting output and a second counting output, and combines the first counting output with the second counting output to generate the counting output.

    Pixel circuit of a display panel
    443.
    发明授权
    Pixel circuit of a display panel 有权

    公开(公告)号：US11776477B1

    公开(公告)日：2023-10-03

    申请号：US18147112

    申请日：2022-12-28

    Applicant: NOVATEK MICROELECTRONICS CORP.

    Inventor： Sheng-Wen Hsiao

    IPC: G09G3/3233

    CPC classification number: G09G3/3233 ,  G09G2300/0823

    Abstract: A pixel circuit of a display panel is provided, including a first, second, third, fourth, fifth switch, a first capacitor and a diode. The first switch is connected with a positive supplied power voltage. The second switch is connected with the first switch and a data line. The third switch is connected with the first and second switch, generating an emission current as a driving transistor. First end of the first capacitor is connected with the first, second and third switch. Second end of the first capacitor is connected with the third, fourth and fifth switch. The fifth switch is connected with a first initial voltage. Anode of the diode is connected with the third and fourth switch while its cathode is connected with a negative emission source voltage. By configuration of the disclosed pixel circuit, a power rail emission current is independent, without being involved with initial voltages.

    DISPLAY DEVICE AND DRIVER THEREOF
    444.
    发明公开
    DISPLAY DEVICE AND DRIVER THEREOF 审中-公开

    公开(公告)号：US20230306900A1

    公开(公告)日：2023-09-28

    申请号：US18205199

    申请日：2023-06-02

    Applicant: NOVATEK MICROELECTRONICS CORP.

    Inventor： Yu-Sheng Ma ,  Jhih-Siou Cheng ,  Chun-Fu Lin ,  Jin-Yi Lin ,  Ju-Lin Huang

    IPC: G09G3/32

    CPC classification number: G09G3/32 ,  G09G2320/064 ,  G09G2330/021

    Abstract: The present disclosure relates to a driver for driving a light emitting unit array of a display device, the driver including: a plurality of driving units, each of the plurality of driving units includes: a driving circuit configured to provide a driving current to a corresponding column of light emitting units in the light emitting unit array according to a pulse width modulation signal, during a turn-on period of a channel switch; a charge path circuit configured to be connected in parallel with the driving circuit, and to be turned on during the turn-on period of the channel switch to form a charge path; and a discharge path circuit configured to be connected in parallel with the driving circuit, and to be turned-on after the channel switch is turned off, to form a discharge path.

    IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD THEREOF
    445.
    发明公开
    IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD THEREOF 审中-公开

    公开(公告)号：US20230298220A1

    公开(公告)日：2023-09-21

    申请号：US18323351

    申请日：2023-05-24

    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 ,  G06T5/009 ,  G06T5/002 ,  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.

    Display-and-touch system having interference sensing capacitor
    450.
    发明授权
    Display-and-touch system having interference sensing capacitor 有权

    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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