Patent ID: 11887548
Assignee: LG DISPLAY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A gate driver comprising a plurality of signal transmission units cascade-connected via a carry line to which a carry signal is for being applied from a previous signal transmission unit,
wherein an nth (n is a positive integer) signal transmission unit includes:
a first circuit unit including a first Q logic generator configured to receive the carry signal from the previous signal transmission unit to charge a first control node, and a second Q logic generator configured to discharge the first control node;
a second circuit unit configured to discharge a second control node according to a voltage of the first control node; and
an output unit configured to output a carry signal and a gate signal based on potentials of the first control node and the second control node,
wherein the second Q logic generator includes:
a second-1 transistor having a first electrode connected to the first control node, a gate electrode connected to the second control node, a back gate electrode for receiving a carry signal from a next signal transmission unit, and a second electrode connected to a buffer node; and
a second-2 transistor having a first electrode connected to the buffer node, a gate electrode connected to the second control node, a back gate electrode for receiving the carry signal from the next signal transmission unit, and a second electrode connected to a low potential voltage line, and
wherein the second-1 and second-2 transistors are configured to receive a carry signal of a gate low voltage from the next signal transmission unit to the respective back gate electrode while being turned off as the second control node is discharged.