公开(公告)号：US20230251739A1

公开(公告)日：2023-08-10

申请号：US18112642

申请日：2023-02-22

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hung-Hsiang Chen ,  Chang-Hung Chen ,  Huang-Chin Tang

IPC: G06F3/041 ,  G09G3/3225

CPC classification number: G06F3/04166 ,  G09G3/3225 ,  G09G2310/08

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: dividing each display frame into at least one display period and at least one touch detection period which are alternated; during each display period, generating sequentially-shifted gate driving signals and sequentially-shifted light-emission control signals, and sequentially applying the sequentially-shifted gate driving signals to at least a part of gate driving lines, and sequentially applying the sequentially-shifted light-emission control signals to at least a part of light-emission control lines; during each touch detection period, suspending generation of sequentially-shifted gate driving signals without suspending generation of sequentially-shifted light-emission control signals; and during a period when a gate driving signal for each row of pixels is of active level, maintaining a light-emission control signal for the row of pixels at inactive level.

公开(公告)号：US20230236677A1

公开(公告)日：2023-07-27

申请号：US18098122

申请日：2023-01-18

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hao-Wei Cheng ,  Chin-Lin Lee

IPC: G06F3/0354

CPC classification number: G06F3/03545

Abstract: A stylus control circuit used to control a stylus includes a positioning signal generator. The positioning signal generator is used to generate a first positioning signal having a first frequency and transmit the first positioning signal to the stylus through a first positioning transmission electrode. Wherein, the first frequency corresponds to a position of the first positioning transmission electrode, and the first positioning signal is a frequency signal without carrying any digital data.

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：US20230206872A1

公开(公告)日：2023-06-29

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.

公开(公告)号：US20230206801A1

公开(公告)日：2023-06-29

申请号：US17646198

申请日：2021-12-28

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： JHIH-SIOU CHENG ,  YEN-RU KUO ,  CHIH-HSIEN CHOU

IPC: G09G3/20

CPC classification number: G09G3/20 ,  G09G2330/021 ,  G09G2310/0289 ,  G09G2310/0291 ,  G09G2310/08

Abstract: A display driver and a driving method thereof is disclosed. The display driver includes at least one first latch, at least one second latch, an output buffer, and a comparator. The first latch receives input data. The input terminal of the second latch is coupled to the output terminal of the first latch. The output buffer, including at least one variable current source, is coupled to the second latch. The comparator is coupled to the first latch, the second latch, and the variable current source. The comparator generates at least one control signal of the variable current source.

公开(公告)号：US11677594B1

公开(公告)日：2023-06-13

申请号：US17706632

申请日：2022-03-29

Applicant: Novatek Microelectronics Corp.

Inventor： Tien-Chien Lee ,  Chao-Kai Tu ,  Sheng Hao Tseng

IPC: H04L25/03 ,  H04L25/02 ,  H04L25/06

CPC classification number: H04L25/0328 ,  H04L25/0272 ,  H04L25/061

Abstract: The disclosure provides a receiver and an automatic offset cancellation (AOC) method thereof. The receiver includes a receiving channel circuit and an AOC circuit. The receiving channel circuit generates an equalized differential signal including an equalized first-end signal and an equalized second-end signal according to an input differential signal. The AOC circuit detects a peak of the equalized first-end signal to generate a first peak detection result. The AOC circuit detects a peak of the equalized second-end signal to generate a second peak detection result. The AOC circuit compares the first peak detection result with the second peak detection result to generate a comparison result. The AOC circuit compensates a mismatch of an input differential pair in the receiving channel circuit according to the comparison result.

公开(公告)号：US11657755B1

公开(公告)日：2023-05-23

申请号：US17741485

申请日：2022-05-11

Applicant: Novatek Microelectronics Corp.

Inventor： Feng-Ting Pai

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0809 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0242 ,  G09G2320/0673 ,  G09G2330/021 ,  G09G2340/16 ,  G09G2360/10

Abstract: A display driving circuit configured to drive a display panel to display a video is provided. The display driving circuit includes a compensating circuit and a gamma voltage generating circuit. The compensating circuit is configured to receive a voltage compensating map of each frame of the video and a pixel line address. The compensating circuit determines a voltage compensating value of each pixel line according to the voltage compensating map of each frame and the pixel line address. The compensating circuit generates a compensated gamma curve of each pixel line. The gamma voltage generating circuit is coupled to the compensating circuit. The gamma voltage generating circuit is configured to generate a gamma voltage of each pixel line according to the compensated gamma curve.

公开(公告)号：US20230152918A1

公开(公告)日：2023-05-18

申请号：US17858945

申请日：2022-07-06

Applicant: Novatek Microelectronics Corp.

Inventor： Yu-Ying Tang ,  Wei-Ren Chang ,  Chih-Yang Ke ,  Chih-Chang Lai

IPC: G06F3/041 ,  G06F3/0354 ,  G09G3/20

CPC classification number: G06F3/04162 ,  G06F3/03545 ,  G06F3/0412 ,  G09G3/20 ,  G09G2310/0267 ,  G09G2300/0408 ,  G09G2354/00

Abstract: A display panel and an operation method of the display panel are provided. The display panel includes a display area and a frame area. The display area is configured to display an image. During a touch sensing period, the display area and the frame area emit an uplink signal to perform an active stylus touch detection operation.

公开(公告)号：US11651746B2

公开(公告)日：2023-05-16

申请号：US17855606

申请日：2022-06-30

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Hung-Ho Huang ,  Kang-Fan Yeh ,  Po-Hsiang Fang

IPC: G09G3/34 ,  G09G3/36

CPC classification number: G09G3/3426 ,  G09G3/36 ,  G09G2310/0297 ,  G09G2320/0646 ,  G09G2360/16

Abstract: A backlight driving device and an operating method thereof are provided to drive multiple backlight zones of a backlight panel. The backlight driving device includes an interface circuit and a driving circuit. The interface circuit receives main backlight data corresponding to a first backlight zone from a former stage device. The driving circuit drives the first backlight zone according to a main current level in a display refresh period of a backlight frame period, does not drive the first backlight zone in a demotion blur period which is prior to the display refresh period, and drives the first backlight zone according to a compensation current level in a vertical blanking period which succeeds the display refresh period. The driving circuit determines the main current level according to the main backlight data, and the compensation current level is lower than the main current level.

公开(公告)号：US20230121521A1

公开(公告)日：2023-04-20

申请号：US17501985

申请日：2021-10-14

Applicant: Novatek Microelectronics Corp.

Inventor： Hao-Che Hsu ,  Chin-Tung Chan ,  Ying-Cheng Lin ,  Ren-Hong Luo

IPC: H04L25/02 ,  H03F3/45

Abstract: A signal receiver includes a first transistor, a second transistor, a load circuit, an amplifying circuit and a load circuit. The first transistor has a first end receiving a power voltage, and a control end receive a first input signal. The second transistor has a first end receiving the power voltage, and a control end receiving a second input signal, wherein the first input signal and the second input signal are differential signals and transit between a first voltage and a reference ground voltage, the first voltage is larger than the power voltage. The load circuit is coupled to the first transistor and the second transistor. The amplifying circuit generates an output signal according a first signal on the second end of the first transistor and a second signal on the second end of the second transistor.