公开(公告)号：US20250008242A1

公开(公告)日：2025-01-02

申请号：US18216606

申请日：2023-06-30

Applicant: NOVATEK Microelectronics Corp.

Inventor： Pai-Hsiang Hsu ,  Yueh-Ru Lee

IPC: H04N25/78 ,  H03K5/24

Abstract: A comparator includes an input stage, a gain stage, an output stage and a clamp circuit. The input stage receives an input signal and a ramp signal and generates a first output signal. The gain stage, coupled to the input stage, receives the first output signal and generates a second output signal. The output stage, coupled to the gain stage, receives the second output signal and generates a third output signal. The clamp circuit, coupled to the gain stage and the output stage.

公开(公告)号：US12183231B1

公开(公告)日：2024-12-31

申请号：US18479124

申请日：2023-10-02

Applicant: Novatek Microelectronics Corp.

Inventor： Hsi-Mao Yu ,  Te-Hsien Kuo

IPC: G09G3/00

Abstract: A display driving circuit adapted to drive a display panel to display an image is provided. The display driving circuit includes a source driver circuit and a timing controller circuit. The source driver circuit is configured to sense whether noise occurs and output a lock signal. The lock signal indicates whether the noise occurs. The timing controller circuit is coupled to the source driver circuit, and configured to output image data to the source driver circuit and receive the lock signal from the source driver circuit. The timing controller circuit adjusts a data depth of the image data or a frame rate of the display panel when the lock signal indicates the noise occurs.

公开(公告)号：US20240428722A1

公开(公告)日：2024-12-26

申请号：US18467050

申请日：2023-09-14

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： CHE-WEI YEH ,  YU-HSIANG WANG ,  HO-CHUN CHANG ,  PO-HSIANG FANG

IPC: G09G3/32

Abstract: A light-emitting-diode driver structure applicable to driving a display panel and operation method thereof are provided. The LED driver structure includes at least one LED driving group, and the LED driving group is composed of a plurality of LED driving circuits which are serially connected in cascade. Each LED driving circuit of the LED driving group receives a data input signal in common. Upon receiving control signals, output signals are generated to drive the display panel. The multi-point driving circuit scheme can be fully or partially applied in the driver structure as required. In addition, a plurality of enable signals can be further adopted to activate each LED driving circuit, for avoiding the FIFO register used in the prior arts. By employing the disclosed technical contents, the present invention is effective in reducing both redundant power waste and circuit layout area of a conventional LED driver.

公开(公告)号：US20240413748A1

公开(公告)日：2024-12-12

申请号：US18331181

申请日：2023-06-08

Applicant: Novatek Microelectronics Corp.

Inventor： Tuo-Kuang Chen ,  Lo Pang-Yen Ting ,  Nien-Hsiu Yen

IPC: H02M3/156

Abstract: A power converting device includes a power transistor, a detecting device, a signal converter and a controller. The detecting device obtains a detection voltage by detecting an output voltage on the output end of the power converting device and a detection current by detecting an operation current of the power transistor. The signal converter converts the detection voltage from a first format to a second format, and converts the detection current from the first format to the second format. The controller receives the detection voltage and the detection current in the second format. Wherein the controller compares the detection voltage with a first voltage threshold value and a second voltage threshold value to adjust a control code, and generates a control signal to a control end of the power transistor according to the control code.

公开(公告)号：US20240405658A1

公开(公告)日：2024-12-05

申请号：US18325080

申请日：2023-05-29

Applicant: Novatek Microelectronics Corp.

Inventor： Tuo-Kuang Chen ,  Jui-Chi Chang ,  Yi-Meng Lan ,  Yi-Chun Lee

IPC: H02M1/00 ,  H02M3/07 ,  H02M3/156

Abstract: A power supply device and an operation method thereof are provided. The power supply device includes a charge pump circuit and a power supply circuit. The power supply circuit supplies a first power voltage to the charge pump circuit. The charge pump circuit converts the first power voltage into a second power voltage so as to supply the second power voltage to an application circuit. The power supply circuit detects the second power voltage or an output current output by the charge pump circuit to obtain a detection result. The power supply circuit dynamically adjusts the first power voltage based on the detection result.

公开(公告)号：US20240397231A1

公开(公告)日：2024-11-28

申请号：US18320998

申请日：2023-05-22

Applicant: Novatek Microelectronics Corp.

Inventor： Min Huang ,  Chi-Ting Chen

IPC: H04N25/772 ,  G06V40/13

Abstract: A pixel reading device, which includes a first capacitor, a second capacitor, a voltage generating circuit, and an analog front-end (AFE) circuit, is provided. A first terminal of the first capacitor is coupled to a fingerprint sensing pixel to receive a sensing voltage. A first terminal of the second capacitor is coupled to a second terminal of the first capacitor. The voltage generating circuit provide a compensation voltage to a second terminal of the second capacitor. During a sensing period of the fingerprint sensing pixel, the compensation voltage is at an initial level. During a level reading period of the fingerprint sensing pixel, the compensation voltage is pulled up from the initial level to a compensation level to compensate a common mode component of the sensing voltage. An input terminal of the AFE circuit is coupled to the second terminal of the first capacitor.

公开(公告)号：US20240381003A1

公开(公告)日：2024-11-14

申请号：US18315579

申请日：2023-05-11

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： PAI-HSIANG HSU ,  CHAO-YU MENG ,  YUEH-RU LEE

IPC: H04N25/78 ,  H04N25/77

Abstract: An image readout device includes comparator circuits. Each comparator circuit includes an amplifier, an input capacitor, an auto-zero switch, and a control capacitor. The amplifier compares a pixel signal to a reference signal to generate a comparison signal. The input capacitor receives the pixel signal or the reference signal. The auto-zero switch couples or decouples the input node and the output node of the amplifier. The control capacitor receives a respective control signal. Alternatively, the control capacitor can be replaced with a control switch. The control switch is coupled to the auto-zero switch in parallel. The control switch and the control capacitor can be omitted. Instead, the voltage level of the reference signal is adjusted to change the transition time points of the comparison signal.

公开(公告)号：US12142245B2

公开(公告)日：2024-11-12

申请号：US17945082

申请日：2022-09-14

Applicant: NOVATEK Microelectronics Corp.

Inventor： Che-Wei Yeh ,  Keko-Chun Liang ,  Yu-Hsiang Wang ,  Yong-Ren Fang ,  Yi-Chuan Liu ,  Yi-Yang Tsai ,  Po-Hsiang Fang

IPC: G11C19/28 ,  G09G3/20 ,  G09G5/12

Abstract: A control system includes a plurality of driving circuits coupled in series, which include a first driving circuit and a second driving circuit. The first driving circuit includes a first receiver, a first transmitter and a first flag signal selector. The first transmitter is coupled to the first receiver, and the first flag signal selector is coupled between the first receiver and the first transmitter. The second driving circuit, coupled to the first driving circuit, includes a second receiver, a second transmitter and a second flag signal selector. The second transmitter is coupled to the second receiver, and the second flag signal selector is coupled between the second receiver and the second transmitter.

公开(公告)号：US12142190B1

公开(公告)日：2024-11-12

申请号：US18522263

申请日：2023-11-29

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chieh-An Lin ,  Chun-Wei Kang ,  Po-Hsiang Fang ,  Keko-Chun Liang ,  Jhih-Siou Cheng ,  Nien-Tsung Hsueh ,  Che-Wei Yeh ,  Yu-Hsiang Wang

IPC: G09G3/32 ,  G09G3/20

Abstract: A display control system for controlling a display panel having a plurality of display zones includes a main controller, a plurality of display driver circuits and a plurality of memories. Each of the display driver circuits is coupled to a corresponding display zone among the plurality of display zones, to control the corresponding display zone. Each of the memories is coupled to a corresponding display driver circuit among the plurality of display driver circuits, to store a compensation data for the corresponding display zone controlled by the corresponding display driver circuit. The plurality of display driver circuits are cascaded through a plurality of first transmission channels and connected through at least one second transmission channel, and each of the first transmission channels is coupled between two of the plurality of display driver circuits or between one of the plurality of display driver circuits and the main controller.

公开(公告)号：US20240371317A1

公开(公告)日：2024-11-07

申请号：US18311902

申请日：2023-05-04

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ching-Hua LIU ,  Yen-Tao LIAO

IPC: G09G3/3208 ,  G06F3/14 ,  G06T5/00

Abstract: A processor is disposed in a display device and is configured to perform following operations: calculating a total coupling coefficient for a (N−1)th frame according to input data, in which N is a positive integer greater than 1; calculating a coupling coefficient difference value of two adjacent lines for a Nth frame according to the input data; generating a first compensation value for a target sub-pixel according to the coupling coefficient difference value and target input data of the target sub-pixel; generating a second compensation value for the target sub-pixel according to the first compensation value and the total coupling coefficient; generating an output data for the target sub-pixel according to the target input data and the second compensation value; and controlling a display panel in the display device to display a final image according to the output data.