公开(公告)号：US20220036527A1

公开(公告)日：2022-02-03

申请号：US16944165

申请日：2020-07-31

Applicant: Novatek Microelectronics Corp.

Inventor： Chih-Yu Chu ,  Po-Yuan Hsieh ,  Chieh-En Lee ,  Chung-Hao Tien ,  Shih-Hsuan Chen

IPC: G06T7/00 ,  G06T7/11 ,  G06K9/62 ,  G06T5/20

Abstract: A method and an image processing device for mura detection on a display are proposed. The method includes the following steps. An original image of the display is received and segmented into region of interest (ROI) patches. A predetermined range of spatial frequency components are filtered out from the ROI patches to generate filtered ROI patches. A mura defect is identified from the display according to the filtered ROI patches and predetermined mura patterns.

公开(公告)号：US20240331185A1

公开(公告)日：2024-10-03

申请号：US18129089

申请日：2023-03-31

Applicant: NOVATEK Microelectronics Corp.

Inventor： Yu-Yi Chien ,  Shih-Hsuan Chen ,  Wen-Lung Hung ,  Po-Yuan Hsieh

IPC: G06T7/70 ,  G01J3/50 ,  G06T5/20 ,  G06T7/90

CPC classification number: G06T7/70 ,  G01J3/506 ,  G06T5/20 ,  G06T7/90 ,  G06T2207/10024 ,  G06T2207/20081 ,  G06T2207/20084

Abstract: A method of obtaining brightness information of a display panel having a plurality of pixels includes steps of: obtaining positioning information indicating positions of the plurality of pixels on a test picture; lighting up the plurality of pixels and capturing the test picture; measuring the plurality of pixels according to the positioning information, to obtain a light intensity distribution of each of the plurality of pixels in the test picture; and calculating the brightness information of each of the plurality of pixels according to the light intensity distribution.

公开(公告)号：US12205509B2

公开(公告)日：2025-01-21

申请号：US17985901

申请日：2022-11-13

Applicant: Novatek Microelectronics Corp.

Inventor： Chao-Chi Yeh ,  Shih-Hsuan Chen ,  Chun-Ping Niou

IPC: G09G3/20 ,  G09G3/3275

Abstract: A method for outputting a grayscale data, a driving controller, and a display apparatus are provided. The method includes: in response to receiving a first input grayscale data which is not greater than a first threshold, generating a first output grayscale data without performing a dither computing on the first input grayscale data and outputting the first output grayscale data; in response to receiving a second input grayscale data which is greater than a second threshold, generating a first dithered grayscale data by performing a first dither computing on the second input grayscale data and outputting the first dithered grayscale data as a second output grayscale data. The second threshold is greater than the first threshold, and the second output grayscale data does not comprise any part of the second input grayscale data not processed by the first dither computing.

公开(公告)号：US11676265B2

公开(公告)日：2023-06-13

申请号：US16944165

申请日：2020-07-31

Applicant: Novatek Microelectronics Corp.

Inventor： Chih-Yu Chu ,  Po-Yuan Hsieh ,  Chieh-En Lee ,  Chung-Hao Tien ,  Shih-Hsuan Chen

IPC: G06T5/20 ,  G06T7/00 ,  G06T7/11 ,  G06V10/25 ,  G06F18/22

CPC classification number: G06T7/001 ,  G06F18/22 ,  G06T5/20 ,  G06T7/11 ,  G06T2207/30168 ,  G06V10/25

Abstract: A method and an image processing device for mura detection on a display are proposed. The method includes the following steps. An original image of the display is received and segmented into region of interest (ROI) patches. A predetermined range of spatial frequency components are filtered out from the ROI patches to generate filtered ROI patches. A mura defect is identified from the display according to the filtered ROI patches and predetermined mura patterns.

公开(公告)号：US20230115938A1

公开(公告)日：2023-04-13

申请号：US17985901

申请日：2022-11-13

Applicant: Novatek Microelectronics Corp.

Inventor： Chao-Chi Yeh ,  Shih-Hsuan Chen ,  Chun-Ping Niou

IPC: G09G3/20 ,  G09G3/3275

Abstract: A method for outputting a grayscale data, a driving controller, and a display apparatus are provided. The method includes: in response to receiving a first input grayscale data which is not greater than a first threshold, generating a first output grayscale data without performing a dither computing on the first input grayscale data and outputting the first output grayscale data; in response to receiving a second input grayscale data which is greater than a second threshold, generating a first dithered grayscale data by performing a first dither computing on the second input grayscale data and outputting the first dithered grayscale data as a second output grayscale data. The second threshold is greater than the first threshold, and the second output grayscale data does not comprise any part of the second input grayscale data not processed by the first dither computing.

公开(公告)号：US11501687B1

公开(公告)日：2022-11-15

申请号：US17496737

申请日：2021-10-07

Applicant: Novatek Microelectronics Corp.

Inventor： Chao-Chi Yeh ,  Shih-Hsuan Chen ,  Chun-Ping Niou

IPC: G09G3/20 ,  G09G3/36 ,  G09G3/00

Abstract: An image processing circuit is provided. The image processing circuit includes a dither computing circuit and a blending circuit. The dither computing circuit performs a dither computing on the input grayscale data to generate a dithered grayscale data. The blending circuit receives the input grayscale data and the dithered grayscale data, generates a blending weight by comparing the input grayscale data with a first threshold, and performs a blending computing on the input grayscale data and the dithered grayscale data based on the blending weight to output an output grayscale data.