US 12,475,548 B2
Method of detecting cutting line of display apparatus
Kanghyuk Lee, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Mar. 7, 2023, as Appl. No. 18/118,207.
Claims priority of application No. 10-2022-0089032 (KR), filed on Jul. 19, 2022.
Prior Publication US 2024/0029230 A1, Jan. 25, 2024
Int. Cl. G06T 7/00 (2017.01)
CPC G06T 7/0004 (2013.01) [G06T 2207/20021 (2013.01); G06T 2207/30108 (2013.01); G06T 2207/30204 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of detecting a cutting line of a display apparatus, the method comprising:
recognizing a reference mark from a captured image of the display apparatus including a first area extending along a boundary of a substrate of the display apparatus, a second area positioned on an inner side of the first area, and a background area positioned on an outer side of the first area;
designating a measurement area in the captured image to be apart from the reference mark by a preset distance toward the boundary of the substrate;
generating a reference line parallel to the boundary of the substrate, within the measurement area;
generating a plurality of detection areas within the measurement area;
increasing a difference between grayscale values of pixels constituting the measurement area;
determining cutting points in each of the plurality of detection areas, and detecting the cutting line based on the cutting points; and
measuring a distance between the cutting line and the reference mark.