Patent ID: 11887532
Assignee: LG DISPLAY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 18:
19. A display device comprising:
a display panel including a gate line; and
a gate driving circuit which, in operation, drives the gate line, the gate driving circuit including:
a gate output buffer circuit coupled to the gate line, the gate output buffer circuit including:
a pull-up transistor having a gate node connected to a Q node; and
a pull-down transistor having a gate node connected to a QB node; and

a control circuit including a first transistor coupled to the QB node, the control circuit, in operation:
applying a second low level voltage of a second low level voltage node to a gate node of the first transistor and a source node of the first transistor when voltage of the Q node is at a first level; and
electrically isolating the second low level voltage node from the gate node of the first transistor when a ripple in the voltage of the Q node is applied to a gate node of a second transistor connected between the gate node of the first transistor and the second low level voltage node.