US 12,189,893 B2
Touch test device and method for display device
Seung Rok Lee, Yongin-si (KR); Jin Woo Park, Yongin-si (KR); Tae Joon Kim, Yongin-si (KR); Jung Mok Park, Yongin-si (KR); and Il Ho Lee, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Aug. 29, 2023, as Appl. No. 18/239,225.
Claims priority of application No. 10-2023-0007325 (KR), filed on Jan. 18, 2023.
Prior Publication US 2024/0241600 A1, Jul. 18, 2024
Int. Cl. G06F 3/041 (2006.01)
CPC G06F 3/0418 (2013.01) [G06F 3/0412 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A touch test device for a display device, the touch test device comprising:
a loading unit receiving a display device, the display device including a touch sensing unit having driving electrodes and sensing electrodes;
a touch driving circuit driving the driving electrodes and the sensing electrodes and detecting touch signal data for the driving electrodes, sensing signal data for the sensing electrodes, and touch data of touch nodes positioned at intersections between the driving electrodes and the sensing electrodes; and
a test processing circuit that calculates parameter values inversely proportional to resistance deviations of the driving electrodes and the sensing electrodes, performs an arithmetic operation on the parameter values and the touch data of the touch nodes to provide corrected touch data, and detects defects in the driving electrodes and the sensing electrodes according to a result of comparing and analyzing the corrected touch data.