公开(公告)号：US11823635B2

公开(公告)日：2023-11-21

申请号：US17467443

申请日：2021-09-06

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chun-Fu Lin ,  Hsing-Kuo Chao ,  Jhih-Siou Cheng ,  Ju-Lin Huang ,  Wen-Hsin Cheng

IPC: G09G3/30 ,  G09G3/34 ,  G02F1/1335 ,  G02F1/13357

CPC classification number: G09G3/3426 ,  G02F1/133603 ,  G02F1/133612 ,  G02F1/133628 ,  G09G2300/0408

Abstract: An LED backlight driver includes at least one driving chip configured to drive a backlight module. The at least one driving chip is disposed on at least one chip-on-film package, and not in direct contact with the backlight module to reduce heat transfer to the backlight module.

公开(公告)号：US11557249B2

公开(公告)日：2023-01-17

申请号：US17169519

申请日：2021-02-07

Applicant: NOVATEK Microelectronics Corp.

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

IPC: G09G3/3216 ,  G09G3/3266

Abstract: The present invention provides a method of controlling a display panel. The display panel includes a plurality of subpixels and a plurality of scan lines coupled to the plurality of subpixels. The method includes steps of: scanning a first scan line among the plurality of scan lines to turn on at least one of the plurality of subpixels coupled to the first scan line during a subframe period among a display frame period; and discharging a second scan line among the plurality of scan lines during a non-display period following the subframe period. Wherein, the second scan line is different from the first scan line.

公开(公告)号：US11367390B2

公开(公告)日：2022-06-21

申请号：US16429049

申请日：2019-06-02

Applicant: Novatek Microelectronics Corp.

Inventor： Keko-Chun Liang ,  Yu-Hsiang Wang ,  Jhih-Siou Cheng ,  Yi-Chuan Liu ,  Ju-Lin Huang

IPC: G09G3/3233 ,  G09G3/3275

Abstract: A display apparatus and a method for noise reduction are introduced. The method comprises steps of sensing a first pixel signal being superimposed by noises from a first pixel through a first sensing line in a first phase of a sensing operation and sensing a first noise signal from the first sensing line in a second phase of the sensing operation. The method further comprises steps of sensing a second noise signal from a second sensing line in the first phase of the sensing operation, and sensing a third noise signal from the second sensing line in the second phase of the sensing operation. The method further removes the noises that are superimposed to the first pixel signal according to a difference between the first pixel signal and the first noise signal and a difference between the second noise signal and the third noise signal to generate a denoised sensing value of the first pixel.

公开(公告)号：US11296500B2

公开(公告)日：2022-04-05

申请号：US16821947

申请日：2020-03-17

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Ju-Lin Huang ,  Chia-En Wu

IPC: H02H9/04 ,  H01L27/02

Abstract: The present invention provides an output circuit with electrostatic discharge (ESD) protection in a semiconductor chip of a source driver. The source driver is configured to drive a display panel. The output circuit includes an output buffer, an output pad, a switch and a first resistor. The switch is coupled between the output buffer and the output pad, wherein data voltages for driving the display panel are transmitted from the output buffer to the output pad via the switch. The switch includes a first metal oxide semiconductor (MOS) transistor, which includes a first terminal coupled to the output pad, a bulk terminal and a gate terminal. The first resistor is coupled between the bulk terminal of the first MOS transistor and a first power supply terminal.

公开(公告)号：US11291095B1

公开(公告)日：2022-03-29

申请号：US17216666

申请日：2021-03-29

Applicant: NOVATEK Microelectronics Corp.

Inventor： Tso-Sheng Chan ,  Jin-Yi Lin ,  Chun-Fu Lin ,  Jhih-Siou Cheng ,  Yu-Sheng Ma

IPC: H05B45/39

Abstract: A coupling compensation module is provided, for compensating a channel voltage of a channel outputted by a constant current circuit of a light emitting diode (LED) driver. The coupling compensation module includes a detecting circuit, for detecting a voltage variation of the channel voltage, to generate a detection result; and a compensation circuit, for compensating the voltage variation of the channel voltage according to the detection result.

公开(公告)号：US11211016B2

公开(公告)日：2021-12-28

申请号：US16512413

申请日：2019-07-16

Applicant: Novatek Microelectronics Corp.

Inventor： Chih-Hsien Chou ,  Jhih-Siou Cheng ,  Jin-Yi Lin

IPC: G06F1/00 ,  G09G3/3291

Abstract: A source driver is configured to drive an organic light-emitting diode (OLED) display panel. The source driver includes a sensing circuit and an operational amplifier. The sensing circuit is configured to sense pixel information of an OLED pixel circuit through a sensing line of the OLED display panel. The operational amplifier includes an amplifier circuit and at least one switch circuit. The amplifier circuit includes at least one gain circuit. An input terminal of the amplifier circuit is coupled to an output terminal of the sensing circuit. Each of the at least one switch circuit is coupled between a pair of output terminals of a corresponding one of the at least one gain circuit.

公开(公告)号：US20210390901A1

公开(公告)日：2021-12-16

申请号：US17111449

申请日：2020-12-03

Applicant: NOVATEK Microelectronics Corp.

Inventor： Yu-Sheng Ma ,  Jhih-Siou Cheng ,  Chun-Fu Lin ,  Tso-Sheng Chan ,  Ren-Chieh Yang

IPC: G09G3/32

Abstract: The present invention provides a source driver for driving a light emitting diode panel. The source driver includes a buffer including an output terminal; and a plurality of driving circuits coupled to the buffer. Each of the plurality of driving circuits includes a constant current transistor including a gate controlled by a node voltage of the output terminal of the buffer; and a compensation unit for compensating the node voltage of the output terminal of the buffer.

公开(公告)号：US20210375200A1

公开(公告)日：2021-12-02

申请号：US17169519

申请日：2021-02-07

Applicant: NOVATEK Microelectronics Corp.

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

IPC: G09G3/3216 ,  G09G3/3266

Abstract: The present invention provides a method of controlling a display panel. The display panel includes a plurality of subpixels and a plurality of scan lines coupled to the plurality of subpixels. The method includes steps of: scanning a first scan line among the plurality of scan lines to turn on at least one of the plurality of subpixels coupled to the first scan line during a subframe period among a display frame period; and discharging a second scan line among the plurality of scan lines during a non-display period following the subframe period. Wherein, the second scan line is different from the first scan line.

公开(公告)号：US20210350731A1

公开(公告)日：2021-11-11

申请号：US16867483

申请日：2020-05-05

Applicant: Novatek Microelectronics Corp.

Inventor： Yi-Yang Tsai ,  Po-Hsiang Fang ,  Jhih-Siou Cheng ,  Ju-Lin Huang

IPC: G09G3/00 ,  G09G3/3291

Abstract: A source driver and a calibration method thereof are provided. The source driver for driving and sensing a display panel of the disclosure includes a sensing circuit, an analog-to-digital converter circuit and a digital arithmetic circuit. The sensing circuit is configured to receive a reference signal through a sensing channel when the source driver is operated in a calibration mode. The analog-to-digital converter circuit is coupled to the sensing circuit, and configured to convert the reference signal to a digital reference signal. The digital arithmetic circuit is coupled to the analog-to-digital converter circuit, and configured to obtain a calibration parameter according to the digital reference signal. The source driver calibrates a sensing path for sensing a display panel according to the calibration parameter when the source driver is operated in a sensing mode.

公开(公告)号：US20210343232A1

公开(公告)日：2021-11-04

申请号：US17242807

申请日：2021-04-28

Applicant: NOVATEK MICROELECTRONICS CORP.

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

IPC: G09G3/32

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 regulating circuit configured to be connected in parallel with the driving circuit and be turned on according to the pulse width modulation signal to form a path with the corresponding column of the light emitting units, such that a current associated with the light emitting units flows through the path.