公开(公告)号：US11763738B1

公开(公告)日：2023-09-19

申请号：US18104803

申请日：2023-02-02

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hung-I Wang ,  Yen-Tao Liao

IPC: G09G3/32 ,  G09G3/20

CPC classification number: G09G3/32 ,  G09G3/2018 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/043 ,  G09G2340/16

Abstract: A display driver circuit of controlling a display panel includes an emission compensation circuit and an emission optimization circuit. The emission compensation circuit generates an emission compensation estimate according to at least a gray level, an initial emission duty cycle, and a pulse count of a number of emission pulses in a data frame of the display panel. The emission optimization circuit is coupled to the emission compensation circuit and generates a compensated emission signal according to the initial emission duty cycle and the emission compensation estimate, and drive the display panel according to the compensated emission 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：US11483530B1

公开(公告)日：2022-10-25

申请号：US17694650

申请日：2022-03-14

Applicant: NOVATEK Microelectronics Corp.

Inventor： En-Shi Shih ,  Yen-Tao Liao ,  Shih-Ting Huang

IPC: H04N9/69 ,  H04N9/04

Abstract: A color compensation method includes obtaining a target brightness, a target frame rate and a target pulse number; selecting a plurality of second gamma groups from a plurality of first gamma groups according to the target brightness and the target pulse number, wherein the plurality of first gamma groups respectively correspond to a plurality of frame rates; and calculating the compensation value to compensate the display brightness and color according to the target brightness, the target frame rate, the plurality of second gamma groups and a calculation method.

公开(公告)号：US20220020133A1

公开(公告)日：2022-01-20

申请号：US16933979

申请日：2020-07-20

Applicant: Novatek Microelectronics Corp.

Inventor： Li-Chieh Chen ,  Yen-Tao Liao

IPC: G06T7/00

Abstract: The disclosure provides a method and an image processor for computing decay factors for display degradation compensation. The method includes the following steps. A sequence of frames including a current frame are received. Whether the current frame is a dynamic frame or a static frame is determined. When the current frame is the dynamic frame, accumulation on decay factors is performed. When the current frame is the static frame, accumulation on the decay factors is not performed.

公开(公告)号：US11222614B1

公开(公告)日：2022-01-11

申请号：US16985622

申请日：2020-08-05

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Yun-Shu Yang ,  Yen-Tao Liao ,  Jen-Ta Yang

IPC: G09G5/10 ,  G06F1/16

Abstract: An image processing method with auto-adjusting gamma value is provided. This image processing method includes: receiving a detected value dependent upon a view angle between a normal direction of a screen and a sight direction of a viewer to the screen; receiving an original video frame with a plurality of pixels; determining at least one gamma table to obtain a gamma value for a pixel of the plurality of pixels according to the detected value, wherein there is an original pixel value corresponding to the pixel; and generating and outputting a corrected pixel value of the pixel based on the gamma value and the original pixel value of the pixel, wherein the screen is configured to show a corrected video frame having the pixel with the corrected pixel value. An image processing assembly and an image processing system are also provided.

公开(公告)号：US11024242B1

公开(公告)日：2021-06-01

申请号：US16816238

申请日：2020-03-11

Applicant: Novatek Microelectronics Corp.

Inventor： Hui-Feng Lin ,  Yen-Tao Liao

IPC: G09G3/32 ,  G09G3/36

Abstract: A timing controller and an operation method thereof are provided. The timing controller is used to control a signal timing of a display panel. The timing controller includes an analysis circuit and a decision circuit. The analysis circuit analyzes the content of an image frame to obtain an analysis result. The decision circuit is coupled to the analysis circuit to receive the analysis result. The decision circuit determines a global gray level according to the analysis result. In a blanking interval in which a plurality of sub-pixel circuits of the display panel are turned off, a data voltage corresponding to the global gray level is applied to at least one data line of the display panel corresponding to the sub-pixel circuits.

公开(公告)号：US20210043153A1

公开(公告)日：2021-02-11

申请号：US16547586

申请日：2019-08-22

Applicant: NOVATEK Microelectronics Corp.

Inventor： Yun-Shu Yang ,  Yen-Tao Liao ,  Hongchun Cong

IPC: G09G3/36

Abstract: A method of gray level adjustment for an image data generator includes receiving a plurality of image frames including a first image frame and a second image frame next to the first image frame, wherein the first image frame includes a first input subpixel data corresponding to a first subpixel of a display panel and the second image frame includes a second input subpixel data corresponding to the first subpixel; with respect to the first input subpixel data, outputting a first gray level data of a first gamma lookup table as a first output subpixel data; and with respect to the second input subpixel data, outputting a second gray level data of a second gamma lookup table as a second output subpixel data. The first output subpixel data and the second output subpixel data are corresponding to the first subpixel of the display panel.

公开(公告)号：US20200342801A1

公开(公告)日：2020-10-29

申请号：US16395247

申请日：2019-04-26

Applicant: NOVATEK Microelectronics Corp.

Inventor： Yen-Tao Liao ,  Hung-Hsiang Chen ,  Jen-Ta Yang ,  Yi-Wei Lin ,  Huang-Chin Tang

IPC: G09G3/20

Abstract: The present invention discloses a driving method for a source driver, for driving a source line of a display panel. The driving method includes the steps of: driving the source line with a first voltage or a second voltage smaller than the first voltage in a first driving cycle; driving the source line with the first voltage in a second driving cycle next to the first driving cycle when the source line is driven with the first voltage in the first driving cycle; and driving the source line with an overdrive voltage in the second driving cycle when the source line is driven with the second voltage in the first driving cycle. The first voltage is a normal high voltage of the display panel, and the overdrive voltage is greater than the normal high voltage.

公开(公告)号：US10791266B1

公开(公告)日：2020-09-29

申请号：US16449436

申请日：2019-06-23

Applicant: NOVATEK Microelectronics Corp.

Inventor： Yun-Shu Yang ,  Yen-Tao Liao

IPC: H04N5/202 ,  H04N5/232 ,  H04N5/341

Abstract: The image processing circuit includes a receiving circuit, configured to receive a plurality of pixels of a video frame, wherein the plurality of pixels are corresponding to a plurality of pixel locations, a pixel location of a pixel is corresponding to a gamma category value, and the gamma category value is either a gamma-high value or a gamma-low value; and a gamma table circuit, configured to obtain a gamma table; and a compensation circuit, configured to generate an output pixel value; wherein a plurality of first pixel locations are corresponding to a plurality of gamma-high tables, and the plurality of gamma-high tables are mutually different; wherein a plurality of second pixel locations are corresponding to a plurality of gamma-low tables, and the plurality of gamma-low tables are mutually different.

公开(公告)号：US20200243000A1

公开(公告)日：2020-07-30

申请号：US16258695

申请日：2019-01-28

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hsien-Po Huang ,  Yen-Tao Liao

IPC: G09G3/20

Abstract: A method of compensating pixel data for a display panel includes the steps of: receiving a first pixel data and a second pixel data respectively corresponding to two adjacent data lines of the display panel; generating a compensation pixel data by searching a lookup table based on the first pixel data and the second pixel data; and transmitting the compensation pixel data to one of the two adjacent data lines to be displayed on the display panel.