US 12,394,385 B2
Scan driver and display device including the same
Young Wan Seo, Yongin-si (KR); Hae Min Kim, Yongin-si (KR); and Geun 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 Jul. 24, 2024, as Appl. No. 18/782,723.
Claims priority of application No. 10-2023-0188698 (KR), filed on Dec. 21, 2023.
Prior Publication US 2025/0209989 A1, Jun. 26, 2025
Int. Cl. G06F 3/044 (2006.01); C23F 1/02 (2006.01); C23F 1/14 (2006.01); G01R 27/26 (2006.01); G06F 3/041 (2006.01); G06F 3/045 (2006.01); G09G 3/32 (2016.01); G09G 3/3266 (2016.01); G09G 3/3291 (2016.01)
CPC G09G 3/3266 (2013.01) [G09G 3/32 (2013.01); G09G 3/3291 (2013.01); G09G 2310/0267 (2013.01); G09G 2310/0275 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A scan driver comprising:
stages which sequentially output scan signals to scan signal lines during an active period of an N-th frame, wherein N is a positive integer, wherein
at least one of the stages comprises:
an output node controller that supplies a gate-on voltage to a pull-up node in response to a gate control signal of a display driver; and
an output controller that supplies a scan signal to a scan signal line by outputting a scan clock signal, which is input through a scan clock terminal, to the scan signal line in case that the gate-on voltage is supplied to the pull-up node, and
the output node controller comprises:
at least one thin-film transistor which includes a first active layer including a first oxide semiconductor material, and is directly or indirectly connected to the pull-up node; and
at least another one thin-film transistor which includes a second active layer including a second oxide semiconductor material different from the first oxide semiconductor material of the first active layer, and is directly connected to the pull-up node.