Shift register and display device including the same
Disclosed are a shift register and a display device including the same, in which a size of a circuit is reduced. The shift register includes a stage outputting a gate shift clock, supplied through a gate shift clock line, as a scan pulse and outputting a carry shift clock, supplied through a carry shift clock line, as a carry pulse. The carry shift clock line overlaps the gate shift clock line.
1. A shift register comprising:
j number of gate shift clock lines arranged in parallel, where j is a natural number equal to or greater than two;
k number of carry shift clock lines arranged in parallel, where k is a natural number equal to or less than j; and
n number of stages configured to output a gate shift clock signal, supplied through one of the j gate shift clock lines, as a scan pulse, and to output a carry shift clock signal, supplied through one of the k carry shift clock lines, as a carry pulse, where n is a positive integer
wherein the k carry shift clock lines overlap the j gate shift clock lines.
2. The shift register of claim 1 , wherein a gate shift clock signal and a carry shift clock signal, which are respectively supplied to the j gate shift clock lines and the k carry shift clock lines overlapping each other, have a same phase.
3. The shift register of claim 1 , wherein a gate shift clock signal and a carry shift clock signal, which are respectively supplied to the j gate shift clock lines and the k carry shift clock lines overlapping each other, have a same phase and different voltage levels.
4. The shift register of claim 1 , wherein:
each of the j gate shift clock lines comprises a first metal material, and
each of the k carry shift clock lines comprises a second metal material different from the first metal material of the j gate shift clock lines.
5. The shift register of claim 1 , wherein the j gate shift clock lines and the k carry shift clock lines overlapping each other have different widths.
6. The shift register of claim 1 , wherein:
each of the j gate shift clock lines has a first width, and
each of the k carry shift clock lines has a second width different from the first width.
7. The shift register of claim 1 , wherein each of the k carry shift clock lines is provided on an insulation layer covering all of the j gate shift clock lines, and has a width which is narrower than each of the j gate shift clock lines.
8. A display device comprising:
a display panel including a display area and a non-display area surrounding the display area, the display area including a plurality of pixels respectively provided in a plurality of pixel areas defined by intersections of a plurality of gate lines and a plurality of data lines;
a gate driving circuit configured to supply a scan pulse to each of the plurality of gate lines; and
a data driving circuit configured to respectively supply data voltages to the plurality of data lines,
wherein the gate driving circuit includes the shift register of claim 1 .
9. The display device of claim 8 , wherein the non-display area of the display panel comprises:
j number of gate clock pads;
k number of carry clock pads;
j number of gate clock link lines connecting the j gate clock pads to the j gate shift clock lines in a one-to-one relationship; and
k number of carry clock link lines connecting the k carry clock pads to the k carry shift clock lines in a one-to-one relationship.
10. The display device of claim 9 , wherein:
the j gate shift clock lines and the j gate clock link lines are provided on a same layer and are directly connected to each other, and
the k carry shift clock lines and the k carry clock link lines are provided on different layers and are connected to each other through a contact hole.