US 12,223,638 B2
Display defect detection system and detection method thereof
Ki Hyun Kim, Paju-si (KR); and Jong Ju Hong, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Aug. 19, 2022, as Appl. No. 17/891,714.
Claims priority of application No. 10-2021-0178480 (KR), filed on Dec. 14, 2021.
Prior Publication US 2023/0186455 A1, Jun. 15, 2023
Int. Cl. G06T 7/00 (2017.01); G06T 5/70 (2024.01); G06T 7/13 (2017.01); G06T 7/70 (2017.01); G06V 10/24 (2022.01); G06V 10/25 (2022.01); G06V 10/50 (2022.01)
CPC G06T 7/0008 (2013.01) [G06T 5/70 (2024.01); G06T 7/13 (2017.01); G06T 7/70 (2017.01); G06V 10/242 (2022.01); G06V 10/25 (2022.01); G06V 10/50 (2022.01); G06T 2207/20182 (2013.01); G06V 2201/07 (2022.01)] 16 Claims
OG exemplary drawing
 
1. A display defect detection system, comprising:
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.