公开(公告)号：US20240161680A1

公开(公告)日：2024-05-16

申请号：US17984247

申请日：2022-11-10

Applicant: Novatek Microelectronics Corp.

Inventor： Li-Chieh Chen ,  Yen-Tao Liao

IPC: G09G3/20 ,  G09G3/36

CPC classification number: G09G3/2096 ,  G09G3/3614 ,  G09G3/3685 ,  G09G2310/0291 ,  G09G2330/12

Abstract: A timing controller and a polarity control method thereof are provided. The timing controller includes a line buffer and a check circuit. The line buffer temporarily stores a plurality of sub-pixel data of a current sub-pixel row in an image frame so as to transmit the plurality of sub-pixel data of the current sub-pixel row to a source driver. The check circuit generates a polarity command corresponding to the current sub-pixel row for the source driver to set a polarity inversion mode of the current sub-pixel row. The check circuit checks the plurality of sub-pixel data of the current sub-pixel row so as to determine whether to dynamically change the polarity inversion mode of the current sub-pixel row.

公开(公告)号：US11887552B1

公开(公告)日：2024-01-30

申请号：US17883634

申请日：2022-08-09

Applicant: Novatek Microelectronics Corp.

Inventor： Fu-Jung Wen ,  Heng-Yao Lin ,  Yen-Tao Liao ,  Jen-Ta Yang ,  Yu-Hung Su

IPC: G09G3/36

CPC classification number: G09G3/3607 ,  G09G2310/061 ,  G09G2320/0242 ,  G09G2320/0247 ,  G09G2340/0435

Abstract: The disclosure provides a display driving device and a display control device and an operation method thereof. The display control device includes a data analyzing circuit and a data compensation circuit. The data analyzing circuit performs arithmetic operation on multiple sub-pixel data output by a target driving channel of a source driver in a current frame to obtain a resultant value corresponding to the target driving channel. The data compensation circuit determines at least one compensation grayscale value corresponding to the resultant value. The compensation grayscale value is to be displayed by the target driving channel in a vertical blank period of a frame period in which the current frame is displayed. The target driving channel of the source driver outputs at least one compensation voltage corresponding to the at least one compensation grayscale value in the vertical blank period of the frame period.

公开(公告)号：US11508305B2

公开(公告)日：2022-11-22

申请号：US16996821

申请日：2020-08-18

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Huifeng Lin ,  Yen-Tao Liao

IPC: G09G3/3258

Abstract: A driving method of LED display, configured to be applied to an LED display capable of varying a refresh rate thereof and able to reduce brightness changes due to refresh rate variation, is disclosed in the present disclosure. This driving method includes: controlling an organic light-emitting diode of the LED display by an emission signal having a plurality of frame periods, with each of the frame periods having a PWM part with a duty ratio; detecting whether a change in the refresh rate of the LED display exists; and performing a compensation procedure when the change is detected, with the compensation procedure compensating a brightness difference of the organic light-emitting diode occurring due to the change in the refresh rate by adjusting the duty ratio of the PWM part. Said LED display is also disclosed.

公开(公告)号：US20220293028A1

公开(公告)日：2022-09-15

申请号：US17692190

申请日：2022-03-11

Applicant: Novatek Microelectronics Corp.

Inventor： Grace Li ,  Jen-Ta Yang ,  Yen-Tao Liao ,  Yu-Hung Su

IPC: G09G3/20

Abstract: A timing control device for the display panel includes a control circuit. The control circuit is configured to generate a plurality of gate scanning control signals and a data transmission control signal. In response to that a display refresh rate changes from a first frequency to a second frequency, the control circuit adjusts the plurality of gate scanning control signals to generate a plurality of adjusted gate scanning control signals, or adjusts the data transmission control signal to generate an adjusted data transmission control signal, for driving a display panel under the second frequency as the display refresh rate.

公开(公告)号：US11373607B2

公开(公告)日：2022-06-28

申请号：US16820427

申请日：2020-03-16

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Yu-Hung Su ,  Vans Shih ,  Yen-Tao Liao

IPC: G09G3/36

Abstract: A driving method of display device for a display device capable of reducing flicker due to refresh rate variation includes: determining whether a processor of the display device is generating a vertical blank interval of an image signal, wherein said vertical blank interval is next to a last frame data period thereof, and the last frame data period is for a last frame to be displayed by a display panel; and activating a data line of the display panel with a balancing voltage related to data of a line of the last frame when the processor is generating the vertical blank interval, wherein a plurality of sub-pixels of the display panel connects to the data line, the data of the line of the last frame are sequentially transmitted to the plurality of sub-pixels in the last frame data period for displaying the last frame. Said display device is also disclosed.

公开(公告)号：US20220013068A1

公开(公告)日：2022-01-13

申请号：US17368838

申请日：2021-07-07

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hui-Feng Lin ,  Yen-Tao Liao

IPC: G09G3/3233

Abstract: The present invention provides an image processing circuit for compensating image data for a display panel used for displaying first and second image patterns respectively having first and second current loadings. The image processing circuit is used for: receiving a first original image data of the first image pattern and a second original image data of the second image pattern having the same brightness value for a pixel at the same location; converting the first original image data into a first final image data to compensate for an IR drop according to the first current loading; and converting the second original image data into a second final image data to compensate for the IR drop according to the second current loading. The first final image data and the second final image data have substantially the same brightness value for the pixel at the same location.

公开(公告)号：US11087663B1

公开(公告)日：2021-08-10

申请号：US16875885

申请日：2020-05-15

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Yu-Hung Su ,  Grace Li ,  Yen-Tao Liao

IPC: G09G3/20

Abstract: A driving method of display device configured to be applied to a display device capable of reducing the difference in brightness between areas with different widths of a display panel includes: receiving an input signal by a processor to generate an image signal and an original data enable signal, with the image signal and the original data enable signal configured to control the display panel; and generating a gate control signal and a transmission signal by the controller based on the image signal and the original data enable signal for a scan line driver and a data line driver respectively. The gate control signal comprises a plurality of enable periods for activating the plurality of scan lines respectively, and widths of the enable periods for activating scan lines with different lengths are different. Said display device and a display driving circuit are also disclosed.

公开(公告)号：US10891908B1

公开(公告)日：2021-01-12

申请号：US16672524

申请日：2019-11-04

Applicant: NOVATEK Microelectronics Corp.

Inventor： Yen-Tao Liao ,  Shih-Ting Huang ,  Hsien-Po Huang

IPC: G09G3/34 ,  G09G3/36

Abstract: A display system includes a display device and a driver circuit. The display device has a first panel and a second panel, wherein the first panel and the second panel are disposed with a gap therebetween. The driver circuit is coupled to the display device and includes a protection circuit. The protection circuit, coupled to the second panel of the display device, is configured to generate a gray scale data to be outputted to a pixel among a plurality of pixels of the second panel according to a luminance corresponding to the pixel and according to whether a protection function is enabled.

公开(公告)号：US20240054968A1

公开(公告)日：2024-02-15

申请号：US17883634

申请日：2022-08-09

Applicant: Novatek Microelectronics Corp.

Inventor： Fu-Jung Wen ,  Heng-Yao Lin ,  Yen-Tao Liao ,  Jen-Ta Yang ,  Yu-Hung Su

IPC: G09G3/36

CPC classification number: G09G3/3607 ,  G09G2320/0242 ,  G09G2320/0247 ,  G09G2310/061 ,  G09G2340/0435

Abstract: The disclosure provides a display driving device and a display control device and an operation method thereof. The display control device includes a data analyzing circuit and a data compensation circuit. The data analyzing circuit performs arithmetic operation on multiple sub-pixel data output by a target driving channel of a source driver in a current frame to obtain a resultant value corresponding to the target driving channel. The data compensation circuit determines at least one compensation grayscale value corresponding to the resultant value. The compensation grayscale value is to be displayed by the target driving channel in a vertical blank period of a frame period in which the current frame is displayed. The target driving channel of the source driver outputs at least one compensation voltage corresponding to the at least one compensation grayscale value in the vertical blank period of the frame period.

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.