Gate driving circuit having a repair circuit and display device including the same

A gate driving circuit comprising:

• a plurality of signal transmitters which are cascade-connected via a carry line to which a carry signal is applied to each signal transmitter from a previous signal transmitter from the plurality of signal transmitters;
• and
• a first repair line and a second repair line connected to the plurality of signal transmitters,
• wherein an n-th signal transmitter from the plurality of signal transmitters includes:
• a circuit configured to receive the carry signal from the previous signal transmitter, and charge or discharge a first control node and a second control node;
• a first output circuit configured to output a gate signal to a first output node based on potentials of the first control node and the second control node;
• a second output circuit configured to output a carry signal to a second output node based on the potentials of the first control node and the second control node;
• and
• a repair circuit connected to the first repair line, the repair circuit configured to output a repair carry signal that replaces the carry signal output by the second output circuit when a logic signal is applied from the first repair line,
• the second repair line is electrically connected to the first output node, and
• a repair gate signal that replaces the gate signal output by the first output circuit, which is applied to the second repair line, is output to the first output node at a same time when the logic signal is applied,
• wherein n is a positive integer.

A display device comprising:

• a display panel including a plurality of data lines, a plurality of gate lines that intersect the plurality of data lines, a plurality of power lines to which different constant voltages are applied, and a plurality of sub-pixels;
• a data driving circuit configured to supply a data voltage of pixel data to the plurality of data lines;
• and
• a gate driving circuit configured to supply a gate signal to the plurality of gate lines,
• wherein the gate driving circuit includes:
• a plurality of signal transmitters which are cascade-connected via a carry line to which a carry signal is applied to each signal transmitter from a previous signal transmitter from the plurality of signal transmitters;
• and
• a repair line connected to the plurality of signal transmitters,
• wherein an n-th signal transmitter from the plurality of signal transmitters includes:
• a circuit configured to receive the carry signal from the previous signal transmitter, and charge or discharge a first control node and a second control node;
• an output circuit configured to output a gate signal and a carry signal based on potentials of the first control node and the second control node;
• and
• a repair circuit connected to the repair line, the repair circuit configured to output a repair gate signal that replaces the gate signal output by the output circuit and a repair carry signal that replaces the carry signal output by the output circuit when a logic signal is applied from the repair line,
• wherein n is a positive integer.

A display device comprising:

• a display panel including a plurality of data lines, a plurality of gate lines that intersect the plurality of data lines, a plurality of power lines to which different constant voltages are applied, and a plurality of sub-pixels;
• a data driving circuit configured to supply a data voltage of pixel data to the plurality of data lines;
• and
• a gate driving circuit configured to supply a gate signal to the plurality of gate lines,
• wherein the gate driving circuit includes:
• a plurality of signal transmitters which are cascade-connected via a carry line to which a carry signal is applied to each signal transmitter from a previous signal transmitter from the plurality of signal transmitters;
• and
• a first repair line and a second repair line connected to the plurality of signal transmitters,
• wherein an n-th signal transmitter from the plurality of signal transmitters includes:
• a circuit configured to receive the carry signal from the previous signal transmitter, and charge or discharge a first control node and a second control node;
• a first output circuit configured to output a gate signal to a first output node based on potentials of the first control node and the second control node;
• a second output circuit configured to output a carry signal to a second output node based on the potentials of the first control node and the second control node;
• and
• a repair circuit connected to the first repair line, the repair circuit configured to output a repair carry signal replacing the carry signal output by the second output circuit when a logic signal is applied from the first repair line,
• the second repair line is electrically connected to the first output node, and
• a repair gate signal that replaces the gate signal output by the first output circuit, which is applied to the second repair line, is output to the first output node at a same time when the logic signal is applied,
• wherein n is a positive integer.