公开(公告)号：US11164507B2

公开(公告)日：2021-11-02

申请号：US16809478

申请日：2020-03-04

Applicant: Novatek Microelectronics Corp.

Inventor： Po-Hsiang Fang ,  Jhih-Siou Cheng

IPC: G09G3/20

Abstract: An electronic device for driving a display panel and an operation method thereof are provided. The electronic device includes a first input terminal, a first circuit and a second circuit. The first input terminal receives a first sensing signal from a first sensing line of the sensing lines of the display panel. The first circuit generates a first signal according to the first sensing signal and provides a processing circuit with the first signal during a pre-processing period. The second circuit generates a second signal according to the first sensing signal and provides the processing circuit with the second signal during a normal processing period after the pre-processing period.

公开(公告)号：US20210304675A1

公开(公告)日：2021-09-30

申请号：US16827713

申请日：2020-03-24

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Po-Hsiang Fang ,  Chieh-An Lin ,  Keko-Chun Liang ,  Ju-Lin Huang

IPC: G09G3/3258

Abstract: A display driver and a display driving method are provided. The display driving is adapted for driving a display panel and sensing an electrical characteristic of the display panel. The display driver includes a first amplifier circuit. The first amplifier circuit is coupled to the display panel. The first amplifier circuit includes a first driving circuit, a first sensing circuit and a first operational amplifier. The first operational amplifier is coupled to the display panel through a first driving line and a first sensing line. The first driving circuit is configured to provide a first driving signal to the display panel through the first operational amplifier and the first driving line during a driving period. The first sensing circuit is configured to receive a first sensing signal from the display panel through the first operational amplifier and the first sensing line during a first sensing period.

公开(公告)号：US20190325808A1

公开(公告)日：2019-10-24

申请号：US15957910

申请日：2018-04-20

Applicant: Novatek Microelectronics Corp.

Inventor： Keko-Chun Liang ,  Jhih-Siou Cheng ,  Wen-Hsin Cheng

IPC: G09G3/20

Abstract: A driver of a display panel comprises an operational amplifier and a bias control circuit. The operational amplifier outputs an output signal to drive the display panel according to a bias voltage. The bias control circuit is coupled to the operational amplifier and is configured to output the bias voltage to the operational amplifier, wherein the bias control circuit generates the bias voltage according to a random bit stream. The bias voltage is changed according to signal levels of the random bit stream, and a systematic voltage offset of the operational amplifier is adjusted according to the bias voltage. A method adapted to a driver of a display panel, and a display system are also introduced.

公开(公告)号：US20190156736A1

公开(公告)日：2019-05-23

申请号：US16120332

申请日：2018-09-03

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Tzong-Honge Shieh ,  Ju-Lin Huang

IPC: G09G3/3208

Abstract: A driver of a display panel is provided. The driver includes a plurality of sensing channels configured to receive a plurality of sensing signals from the display panel via a plurality of sensing lines and output the sensing signals, the sensing channels are coupled to the sensing lines in an arrangement selected from one of a random arrangement and a normal arrangement. The driver further includes a signal convertor coupled to the sensing channels and configured to receive the sensing signals from the sensing channels in a sequence selected from one of a random sequence and a normal sequence.

公开(公告)号：US20180337646A1

公开(公告)日：2018-11-22

申请号：US15716789

申请日：2017-09-27

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chih-Wen Lu ,  Po-Yu Tseng ,  Jhih-Siou Cheng ,  Shang-I Liu ,  Chih-Hsien Chou

IPC: H03F3/45 ,  G05F1/56 ,  H03F3/30 ,  H03F1/32

CPC classification number: G05F1/56 ,  H03F1/30 ,  H03F1/32 ,  H03F3/30 ,  H03F3/45

Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes a first current source, a first transistor, a second transistor, a third transistor, and a fourth transistor. The control terminal of the first transistor receives a first input signal. The control terminal of the second transistor receives a second input signal. The third transistor has a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the second transistor. The fourth transistor has a first terminal coupled to the second terminal of the second transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the first transistor.

公开(公告)号：US09997119B2

公开(公告)日：2018-06-12

申请号：US14339753

申请日：2014-07-24

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chieh-An Lin ,  Chun-Yung Cho ,  Jhih-Siou Cheng

IPC: G09G3/36

CPC classification number: G09G3/3614 ,  G09G3/3685 ,  G09G2310/027 ,  G09G2310/0291

Abstract: A buffer circuit, a display module, and a display driving method are disclosed. The buffer circuit comprises a positive polarity buffer, a negative polarity buffer. The positive polarity buffer receives a first supply voltage and a second supply voltage to output a positive reference voltage to a positive resistance string. The second supply voltage is less than the first supply voltage. The negative polarity buffer receives the second supply voltage and a third supply voltage to output a negative reference voltage to a negative resistance string. The third supply voltage is less than the second supply voltage.

公开(公告)号：US09952280B2

公开(公告)日：2018-04-24

申请号：US15180069

申请日：2016-06-12

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng

IPC: G01R31/28 ,  G01R31/317

CPC classification number: G01R31/2896 ,  G01R31/2884 ,  G01R31/2894 ,  G01R31/3172

Abstract: An electronic device with COF package is provided. The electronic device includes a flexible substrate, a core circuit unit, multiple output pads and multiple switching elements. First terminals of the switching elements are respectively and electrically connected to output pads of the core circuit unit, and second terminals of the switching elements are respectively and electrically connected to the output pads. In a test stage of the electronic device, the switching elements are sequentially turned on such that one of multiple output signals of the core circuit unit is transmitted to a common test pad outside of the electronic device through corresponding one of the output pads.

公开(公告)号：US20180018928A1

公开(公告)日：2018-01-18

申请号：US15209778

申请日：2016-07-14

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Yi-Chuan Liu

IPC: G09G3/36

Abstract: A display apparatus, a source driver of the display apparatus and an operating method of the source driver are provided. The display apparatus includes a display panel, at least one gate driver and a plurality of source drivers. The display panel includes a plurality of source lines and a plurality of gate lines. A plurality of output terminals of the gate driver are coupled to the gate lines in one-to-one manner. A plurality of output terminals of the source drivers are coupled to the source lines in one-to-one manner to provide a plurality of source driving voltages to the source lines. The source driving voltages include different coarse compensation voltages. The coarse compensation voltages are respectively configured based on distances between the source drivers which control the source lines and input terminals of the gate lines of the display panel.

公开(公告)号：US09659539B2

公开(公告)日：2017-05-23

申请号：US14687931

申请日：2015-04-16

Applicant: Novatek Microelectronics Corp.

Inventor： Po-Yu Tseng ,  Chieh-An Lin ,  Po-Hsiang Fang ,  Jhih-Siou Cheng ,  Ju-Lin Huang ,  Yi-Chuan Liu

IPC: G09G3/36 ,  G09G3/3258

CPC classification number: G09G3/3648 ,  G09G3/3258 ,  G09G3/3677 ,  G09G2300/04 ,  G09G2310/0291 ,  G09G2310/067 ,  G09G2310/08 ,  G09G2320/0223 ,  G09G2320/0252 ,  G09G2330/02

Abstract: A gate driver, a display apparatus having the same, and a gate driving method are provided. The display apparatus includes a plurality of pixels, a data driver circuit, and a gate driver circuit. The gate driver circuit includes M groups of gate channels. Each of the M groups of gate channels includes a control circuit and an output buffer. The control circuit receives a power supply voltage from a power supply circuit and generates a modulated supply voltage. The output buffer is connected to the control circuit, the output buffer is powered by the modulated supply voltage to output a gate signal to a gate line of the display panel, wherein a driving pulse of the gate signal is shaped during a charge period according to the modulated supply voltage, and the shape of the driving pulse of the gate signal is maintained during a pre-charge period.

公开(公告)号：US09626925B2

公开(公告)日：2017-04-18

申请号：US14669003

申请日：2015-03-26

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Po-Hsiang Fang ,  Chieh-An Lin ,  Po-Yu Tseng ,  Ju-Lin Huang ,  Yi-Chuan Liu

IPC: G09G3/36

CPC classification number: G09G3/3648 ,  G09G3/3677 ,  G09G3/3688 ,  G09G2300/0413 ,  G09G2310/08 ,  G09G2320/0223

Abstract: A source driver apparatus and an operating method thereof are provided. The source driver apparatus can drive a plurality of source lines of a display panel, wherein the display panel further comprising a gate driver apparatus. The source driver apparatus includes driving channels and a delay control circuit. The driving channels output source driving signals. The delay control circuit controls the driving channels to change delay times of the source driving signals within the same period, such that the delay times of the source driving signals respectively correspond to distances from the source lines to the gate driver apparatus.