US 12,170,067 B2
Gate driving circuit and display device
Ingu Han, Yangsan-si (KR); and HongJae Shin, Seoul (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Nov. 11, 2022, as Appl. No. 18/054,866.
Claims priority of application No. 10-2021-0193711 (KR), filed on Dec. 31, 2021.
Prior Publication US 2023/0215377 A1, Jul. 6, 2023
Int. Cl. G09G 3/3266 (2016.01); G09G 3/3233 (2016.01)
CPC G09G 3/3266 (2013.01) [G09G 3/3233 (2013.01); G09G 2300/0842 (2013.01); G09G 2320/0626 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel in which a plurality of subpixels is disposed;
a gate line electrically connected to at least one of the plurality of subpixels; and
a gate driving circuit outputting a gate signal to the gate line,
wherein the gate driving circuit comprising:
a pull-up transistor controlled by a voltage level of a Q node;
a pull-down transistor controlled by a voltage level of a QB node;
a pump capacitor electrically connected between the Q node and an input terminal of a gate clock signal; and
a pump transistor electrically connected between the pump capacitor and the Q node, and controlled by the gate signal output to the gate line,
wherein in a period that the pump transistor is turned-on, a difference between the voltage level of the Q node and a voltage level of a light-emitting control signal increases, and
wherein the gate signal is the light-emitting control signal.