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

Claim 21:
22. A display device comprising:
a display panel on which a plurality of data lines, a plurality of gate lines crossing the data lines, a plurality of power lines to which different constant voltages are for being applied, and a plurality of sub-pixels are disposed;
a data driver configured to supply a data voltage of pixel data to the data lines; and
a gate driver configured to supply a gate signal to the gate lines,
wherein the gate driver includes a plurality of signal transmission units cascade-connected via a carry line to which a carry signal is for being applied from a prior signal transmission unit,
wherein an nth (n is a positive integer) signal transmission unit includes:
a circuit unit configured to receive the carry signal from the prior signal transmission unit to charge or discharge voltages of a first control node and a second control node; and
an output unit configured to output a gate signal and a carry signal based on potentials of the first control node and the second control node,
wherein the output unit includes:
a first pull-up transistor having a first electrode connected to a first high potential voltage line, a gate electrode connected to the first control node, and a second electrode connected to a first output node;
a first pull-down transistor having a first electrode connected to the first output node, a gate electrode connected to the second control node, a back gate electrode for receiving a carry signal from a previous signal transmission unit, and a second electrode connected to a first low potential voltage line;
a second pull-up transistor having a first electrode connected to a second high potential voltage line, a gate electrode connected to the first control node, and a second electrode connected to a second output node; and
a second pull-down transistor having a first electrode connected to the second output node, a gate electrode connected to the second control node, a back gate electrode for receiving the carry signal from the previous signal transmission unit, and a second electrode connected to a second low potential voltage line, and
wherein the first and second pull-down transistors are configured to receive a carry signal of a gate low voltage from the previous signal transmission unit to the respective back gate electrode while being turned off as the second control node is discharged.