公开(公告)号：US11935443B2

公开(公告)日：2024-03-19

申请号：US17895701

申请日：2022-08-25

Applicant: LG Display Co., Ltd.

Inventor： Yeong Yu ,  Jong Ju Hong

IPC: G09G3/00 ,  G06V10/25

CPC classification number: G09G3/006 ,  G06V10/25 ,  G09G2320/0626 ,  G09G2340/0407

Abstract: A display defect detection circuit of a display defect detection system includes a preprocessing circuit configured to receive a capture image of a test pattern, displayed by a display panel, as a panel image including target Mura having a repetitive characteristic and preprocess the panel image to output a preprocessing image and a Mura detection circuit configured to decrease a total size of the preprocessing image on the basis of a size of the target Mura to generate a resize image, detect an edge component in the resize image to generate an edge map image having feature values, remove a feature value of a non-repetitive type among the feature values of the edge map image to generate a feature map image, and detect a display position of the target Mura on the basis of a final feature value of the target Mura calculated based on the feature map image.

公开(公告)号：US12223638B2

公开(公告)日：2025-02-11

申请号：US17891714

申请日：2022-08-19

Applicant: LG Display Co., Ltd.

Inventor： Ki Hyun Kim ,  Jong Ju Hong

IPC: G06T7/00 ,  G06T5/70 ,  G06T7/13 ,  G06T7/70 ,  G06V10/24 ,  G06V10/25 ,  G06V10/50

Abstract: A display defect detection system and a detection method thereof are disclosed. A display defect detection system includes a preprocessing circuit receiving a capture image of a test pattern, displayed by a display panel, as a panel image including diagonal Mura and preprocessing the panel image to output a preprocessing image and a Mura detection circuit calculating a final feature value of the diagonal Mura by multiplying a first feature value, in which a luminance difference of the diagonal Mura is reflected, by a second feature value in which a shape ratio of the diagonal Mura is reflected, on the basis of an edge map of the preprocessing image, and detecting a display position of the diagonal Mura on the basis of the final feature value of the diagonal Mura.