Shift register
A shift register includes a plurality of stages each for outputting k composite pulses each including an A-scan pulse and a B-scan pulse. At least one stage includes k A-sub-stages each for controlling a voltage at an A-set node and a voltage at least one A-reset node in response to an external A-control signal and generating an A-carry pulse based on the voltage at the A-set node, the voltage at the at least one A-reset node and any one A-clock pulse, a B-sub-stage for controlling a voltage at a B-set node and a voltage at least one B-reset node in response to an external B-control signal and generating a B-carry pulse, and a scan output controller for generating k A-scan pulses and k B-scan pulses and outputting one of the A-scan pulses and one of the B-scan pulses corresponding to each other as one composite pulse.
1. A shift register comprising a plurality of stages, each of the stages outputting k composite pulses (where k is a natural number greater than 1), each of the composite pulses comprising an A-scan pulse and a B-scan pulse,
wherein at least one of the stages comprises:
k A-sub-stages, each of the A-sub-stages controlling a voltage at an A-set node and a voltage at least one A-reset node in response to an external A-control signal and generating an A-carry pulse based on the voltage at the A-set node, the voltage at the at least one A-reset node and any one A-clock pulse;
a B-sub-stage for controlling a voltage at a B-set node and a voltage at at least one B-reset node in response to an external B-control signal and generating a B-carry pulse based on the voltage at the B-set node, the voltage at the at least one B-reset node and any one B-clock pulse; and
a scan output controller for generating k A-scan pulses based on the voltages at the respective A-set nodes of the A-sub-stages and the A-clock pulses supplied respectively to the A-sub-stages, generating k B-scan pulses based on the B-carry pulse and k BA-clock pulses, and outputting one of the A-scan pulses and one of the B-scan pulses corresponding to each other as a corresponding one of the composite pulses.
2. The shift register according to claim 1 , wherein:
k is 2;
the A-sub-stages are divided into an A1-sub-stage and an A2-sub-stage;
the A-set nodes are divided into an A1-set node connected to the A1-sub-stage and an A2-set node connected to the A2-sub-stage;
the A-reset nodes are divided into at least one A1-reset node connected to the A1-sub-stage and at least one A2-reset node connected to the A2-sub-stage;
the A-clock pulses are divided into a plurality of A1-clock pulses having different phases and a plurality of A2-clock pulses having different phases;
any one of the A1-clock pulses is supplied to the A1-sub-stage and the scan output controller;
any one of the A2-clock pulses is supplied to the A2-sub-stage and the scan output controller;
the BA-clock pulses are divided into a BA1-clock pulse and a BA2-clock pulse;
the A-scan pulses are divided into an A1-scan pulse and an A2-scan pulse;
the B-scan pulses are divided into a B1-scan pulse and a B2-scan pulse;
the A-carry pulses are divided into an A1-carry pulse output through an A1-carry output terminal of the A1-sub-stage and an A2-carry pulse output through an A2-carry output terminal of the A2-sub-stage;
the B-sub-stage outputs the B-carry pulse through a B-carry output terminal;
the scan output controller generates the A1-scan pulse based on a voltage at the A1-set node and the A1-clock pulse, generates the B1-scan pulse based on the B-carry pulse and the BA1-clock pulse, and outputs the A1-scan pulse and the B1-scan pulse as a first one of the composite pulses;
the scan output controller generates the A2-scan pulse based on a voltage at the A2-set node and the A2-clock pulse, generates the B2-scan pulse based on the B-carry pulse and the BA2-clock pulse, and outputs the A2-scan pulse and the B2-scan pulse as a second one of the composite pulses; and
the at least one stage outputs the first composite pulse from the scan output controller through a first scan output terminal and outputs the second composite pulse from the scan output controller through a second scan output terminal.
3. The shift register according to claim 2 , wherein the scan output controller comprises:
an A1-scan output switching device controlled by the voltage at the A1-set node and connected between an A1-clock transfer line, the A1-clock transfer line transferring the A1-clock pulse, and the first scan output terminal;
a B1-scan output switching device controlled by the B-carry pulse and connected between the first scan output terminal and a BA1-clock transfer line, the BA1-clock transfer line transferring the BA1-clock pulse;
an A2-scan output switching device controlled by the voltage at the A2-set node and connected between an A2-clock transfer line, the A2-clock transfer line transferring the A2-clock pulse, and the second scan output terminal; and
a B2-scan output switching device controlled by the B-carry pulse and connected between the second scan output terminal and a BA2-clock transfer line, the BA2-clock transfer line transferring the BA2-clock pulse.
4. The shift register according to claim 3 , wherein the scan output controller further comprises:
an A1-scan discharge switching device controlled by a voltage at the A1-reset node and connected between the first scan output terminal and a first discharging voltage line, the first discharging voltage line transferring a first discharging voltage;
a first A1-control switching device controlled by the B-carry pulse and connected between the A1-reset node and a second discharging voltage line, the second discharging voltage line transferring a second discharging voltage;
an A2-scan discharge switching device controlled by a voltage at the A2-reset node and connected between the second scan output terminal and the first discharging voltage line; and
a first A2-control switching device controlled by the B-carry pulse and connected between the A2-reset node and the second discharging voltage line.
5. The shift register according to claim 3 , wherein the scan output controller further comprises:
an A1-scan discharge switching device controlled by a voltage at the A1-reset node and connected between the first scan output terminal and a first discharging voltage line, the first discharging voltage line transferring a first discharging voltage;
a first A1-control switching device controlled by a voltage at the first scan output terminal and connected between the A1-reset node and a second discharging voltage line, the second discharging voltage line transferring a second discharging voltage;
an A2-scan discharge switching device controlled by a voltage at the A2-reset node and connected between the second scan output terminal and the first discharging voltage line; and
a first A2-control switching device controlled by a voltage at the second scan output terminal and connected between the A2-reset node and the second discharging voltage line.
6. The shift register according to claim 3 , wherein the scan output controller further comprises a second control switching device controlled by the B-carry pulse output through the B-carry output terminal and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device.
7. The shift register according to claim 3 , wherein the scan output controller further comprises:
a second A1-control switching device controlled by the B-carry pulse and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device; and
a second A2-control switching device controlled by the B-carry pulse and connected between the B-carry output terminal and a gate electrode of the B2-scan output switching device.
8. The shift register according to claim 3 , wherein the scan output controller further comprises a third control switching device controlled by an external switching control signal and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device.
9. The shift register according to claim 8 , wherein the switching control signal is any one of a direct current (DC) voltage and an alternating current (AC) voltage.
10. The shift register according to claim 9 , wherein the AC voltage is output synchronously with the B-clock pulse and has a pulse width equal to or different from that of the B-clock pulse.
11. The shift register according to claim 3 , wherein the scan output controller further comprises:
a third A1-control switching device controlled by an external switching control signal and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device; and
a third A2-control switching device controlled by the switching control signal and connected between the B-carry output terminal and a gate electrode of the B2-scan output switching device.
12. The shift register according to claim 11 , wherein the scan output controller further comprises at least one of:
a fourth A1-control switching device controlled by the A1-carry pulse from the A1-sub-stage and connected between the gate electrode of the B1-scan output switching device and a third discharging voltage line, the third discharging voltage line transferring a third discharging voltage;
a fifth A1-control switching device controlled by the voltage at the A1-set node and connected between the gate electrode of the B1-scan output switching device and a fourth discharging voltage line, the fourth discharging voltage line transferring a fourth discharging voltage;
a sixth A1-control switching device controlled by an A1-start pulse and connected between the gate electrode of the B1-scan output switching device and a fifth discharging voltage line, the fifth discharging voltage line transferring a fifth discharging voltage;
a fourth A2-control switching device controlled by the A2-carry pulse from the A2-sub-stage and connected between the gate electrode of the B2-scan output switching device and the third discharging voltage line;
a fifth A2-control switching device controlled by the voltage at the A2-set node and connected between the gate electrode of the B2-scan output switching device and the fourth discharging voltage line;
a sixth A2-control switching device controlled by an A2-start pulse and connected between the gate electrode of the B2-scan output switching device and the fifth discharging voltage line;
a seventh A1-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B1-scan output switching device and a sixth discharging voltage line, the sixth discharging voltage line transferring a sixth discharging voltage; and
a seventh A2-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B2-scan output switching device and the sixth discharging voltage line.
13. The shift register according to claim 3 , wherein the scan output controller further comprises:
an A1-scan discharge switching device controlled by a voltage at the A1-reset node and connected between the first scan output terminal and a first discharging voltage line, the first discharging voltage line transferring a first discharging voltage;
a first A1-control switching device controlled by the B-carry pulse and connected between the A1-reset node and a second discharging voltage line, the second discharging voltage line transferring a second discharging voltage;
a second A1-control switching device controlled by the B-carry pulse and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device;
a seventh A1-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B1-scan output switching device and a sixth discharging voltage line, the sixth discharging voltage line transferring a sixth discharging voltage;
an A2-scan discharge switching device controlled by a voltage at the A2-reset node and connected between the second scan output terminal and the first discharging voltage line;
a first A2-control switching device controlled by the B-carry pulse and connected between the A2-reset node and the second discharging voltage line;
a second A2-control switching device controlled by the B-carry pulse and connected between the B-carry output terminal and a gate electrode of the B2-scan output switching device; and
a seventh A2-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B2-scan output switching device and the sixth discharging voltage line.
14. The shift register according to claim 3 , wherein the scan output controller further comprises:
an A1-scan discharge switching device controlled by a voltage at the A1-reset node and connected between the first scan output terminal and a first discharging voltage line, the first discharging voltage line transferring a first discharging voltage;
a first A1-control switching device controlled by a voltage applied to a gate electrode of the B1-scan output switching device and connected between the A1-reset node and a second discharging voltage line, the second discharging voltage line transferring a second discharging voltage;
a third A1-control switching device controlled by an external switching control signal and connected between the B-carry output terminal and the gate electrode of the B1-scan output switching device;
a seventh A1-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B1-scan output switching device and a sixth discharging voltage line, the sixth discharging voltage line transferring a sixth discharging voltage;
an A2-scan discharge switching device controlled by a voltage at the A2-reset node and connected between the second scan output terminal and the first discharging voltage line;
a first A2-control switching device controlled by the voltage applied to the gate electrode of the B1-scan output switching device and connected between the A2-reset node and the second discharging voltage line;
a third A2-control switching device controlled by the switching control signal and connected between the gate electrode of the B1-scan output switching device and a gate electrode of the B2-scan output switching device; and
a seventh A2-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B2-scan output switching device and the sixth discharging voltage line.
15. The shift register according to claim 3 , wherein the scan output controller further comprises at least one of:
an eighth A1-control switching device controlled by the B-carry pulse and connected between the A1-set node and a seventh discharging voltage line, the seventh discharging voltage line transferring a seventh discharging voltage;
an eighth A2-control switching device controlled by the B-carry pulse and connected between the A2-set node and the seventh discharging voltage line; and
a ninth control switching device controlled by any one of the A1-carry pulse and the A2-carry pulse and connected between the B-carry output terminal of the B-sub-stage and the seventh discharging voltage line.
16. The shift register according to claim 2 , wherein:
the A1-clock pulse is of two or more phases;
the A2-clock pulse is of two or more phases;
the B-clock pulse is of two or more phases;
the BA1-clock pulse is of one or more phases; and
the BA2-clock pulse is of one or more phases,
wherein the B-clock pulse has a period longer than that of each of the A1-clock pulse and A2-clock pulse,
wherein the A1-clock pulse, the A2-clock pulse, the B-clock pulse, the BA1-clock pulse and the BA2-clock pulse have the same pulse widths or at least two of the A1-clock pulse, the A2-clock pulse, the B-clock pulse, the BA1-clock pulse and the BA2-clock pulse have different pulse widths.
17. The shift register according to claim 16 , wherein the A1-clock pulse and the A2-clock pulse are kept low while the B-clock pulse is kept high.
18. The shift register according to claim 2 , wherein the A-control signal comprises an A1-set control signal, an A1-reset control signal, an A2-set control signal and an A2-reset control signal,
wherein the A1-sub-stage of the at least one stage comprises:
a first A1-switching device controlled by the A1-set control signal and connected between a charging voltage line, the charging voltage line transferring a charging voltage, and the A1-set node;
a second A1-switching device controlled by the A1-reset control signal and connected between the A1-set node and an eighth discharging voltage line, the eighth discharging voltage line transferring an eighth discharging voltage;
an A1-inverter for controlling a voltage at the A1-reset node based on the voltage at the A1-set node such that the voltage at the A1-set node and the voltage at the A1-reset node have opposite logics;
an A1-carry output switching device controlled by the voltage at the A1-set node and connected between an A1-clock transfer line, the A1-clock transfer line transferring the A1-clock pulse, and the A1-carry output terminal; and
an A1-carry discharge switching device controlled by the voltage at the A1-reset node and connected between the A1-carry output terminal and a ninth discharging voltage line, the ninth discharging voltage line transferring a ninth discharging voltage.
19. The shift register according to claim 18 , wherein the A1-inverter comprises:
a first A1-inverting switching device controlled by a high voltage from a high voltage line and connected between the high voltage line and the A1-reset node; and
a second A1-inverting switching device controlled by the voltage at the A1-set node and connected between the A1-reset node and a low voltage line, the low voltage line transferring a low voltage.
20. The shift register according to claim 18 , wherein the A1-inverter comprises:
a first A1-inverting switching device controlled by an external control signal and connected between a high voltage line, the high voltage line transferring a high voltage, and the A1-reset node; and
a second A1-inverting switching device controlled by the voltage at the A1-set node and connected between the A1-reset node and a low voltage line, the low voltage line transferring a low voltage.
21. The shift register according to claim 18 , wherein the A1-inverter comprises:
a first A1-inverting switching device controlled by an external control signal and connected between a high voltage line, the high voltage line transferring a high voltage, and an A1-common node;
a second A1-inverting switching device controlled by the voltage at the A1-set node and connected between the A1-common node and a low voltage line, the low voltage line transferring a low voltage;
a third A1-inverting switching device controlled by a voltage at the A1-common node and connected between the high voltage line and the A1-reset node; and
a fourth A1-inverting switching device controlled by the voltage at the A1-set node and connected between the A1-reset node and the low voltage line.
22. The shift register according to claim 18 , wherein the A1-inverter comprises:
a first A1-inverting switching device controlled by a high voltage from a high voltage line and connected between the high voltage line and an A1-common node;
a second A1-inverting switching device controlled by the voltage at the A1-set node and connected between the A1-common node and a low voltage line, the low voltage line transferring a low voltage;
a third A1-inverting switching device controlled by a voltage at the A1-common node and connected between the high voltage line and the A1-reset node; and
a fourth A1-inverting switching device controlled by the voltage at the A1-set node and connected between the A1-reset node and the low voltage line.
23. The shift register according to claim 18 , wherein the A1-inverter comprises:
a first A1-inverting switching device controlled by the voltage at the A1-set node and connected between the A1-reset node and a low voltage line, the low voltage line transferring a low voltage;
a second A1-inverting switching device controlled by the voltage at the A1-reset node and connected between the A1-set node and the first scan output terminal or between the A1-set node and the A1-carry output terminal; and
an A1-capacitor connected between the A1-clock transfer line and the A1-reset node.
24. The shift register according to claim 23 , wherein the A1-inverter further comprises at least one of:
a fifth A1-inverting switching device controlled by the A1-set control signal and connected between the A1-reset node and the low voltage line;
a sixth A1-inverting switching device controlled by the voltage at the A1-reset node and connected between the A1-set node and the low voltage line; and
a seventh A1-inverting switching device controlled by the A1-clock pulse from the A1-clock transfer line and connected between an output terminal, the output terminal outputting the A1-set control signal, and the A1-set node.
25. The shift register according to claim 21 , wherein the A1-inverter further comprises an eighth A1-inverting switching device controlled by the B-carry pulse or a voltage applied to a gate electrode of a B1-scan output switching device of the scan output controller and connected between the A1-common node and the low voltage line.
26. The shift register according to claim 18 , wherein:
the A1-set control signal is an A1-start pulse, or an A1-carry pulse output from any one of stages operating earlier than the at least one stage, among the plurality of stages; and
the A1-reset control signal is an A1-carry pulse output from any one of stages operating later than the at least one stage, among the plurality of stages.
27. The shift register according to claim 2 , wherein the A-control signal comprises an A1-set control signal, an A1-reset control signal, an A2-set control signal and an A2-reset control signal,
wherein the A2-sub-stage of the at least one stage comprises:
a first A2-switching device controlled by the A2-set control signal and connected between a charging voltage line, the charging voltage line transferring a charging voltage, and the A2-set node;
a second A2-switching device controlled by the A2-reset control signal and connected between the A2-set node and an eighth discharging voltage line, the eighth discharging voltage line transferring an eighth discharging voltage;
an A2-inverter for controlling a voltage at the A2-reset node based on the voltage at the A2-set node such that the voltage at the A2-set node and the voltage at the A2-reset node have opposite logics;
an A2-carry output switching device controlled by the voltage at the A2-set node and connected between an A2-clock transfer line, the A2-clock transfer line transferring the A2-clock pulse, and the A2-carry output terminal; and
an A2-carry discharge switching device controlled by the voltage at the A2-reset node and connected between the A2-carry output terminal and a ninth discharging voltage line, the ninth discharging voltage line transferring a ninth discharging voltage.
28. The shift register according to claim 27 , wherein:
the A2-set control signal is an A2-start pulse, or an A2-carry pulse output from any one of stages operating earlier than the at least one stage, among the plurality of stages; and
the A2-reset control signal is an A2-carry pulse output from any one of stages operating later than the at least one stage, among the plurality of stages.
29. The shift register according to claim 2 , wherein the B-control signal comprises a B-set control signal and a B-reset control signal,
wherein the B-sub-stage of the at least one stage comprises:
a first B-switching device controlled by the B-set control signal and connected between a charging voltage line, the charging voltage line transferring a charging voltage, and the B-set node;
a second B-switching device controlled by the B-reset control signal and connected between the B-set node and a tenth discharging voltage line, the tenth discharging voltage line transferring a tenth discharging voltage;
a B-inverter for controlling the voltage at the B-reset node based on the voltage at the B-set node such that the voltage at the B-set node and the voltage at the B-reset node have opposite logics;
a B-carry output switching device controlled by the voltage at the B-set node and connected between a B-clock transfer line, the B-clock transfer line transferring the B-clock pulse, and the B-carry output terminal; and
a B-carry discharge switching device controlled by the voltage at the B-reset node and connected between the B-carry output terminal and an eleventh discharging voltage line, the eleventh discharging voltage line transferring an eleventh discharging voltage.
30. The shift register according to claim 29 , wherein the B-sub-stage further comprises a third B-switching device controlled by the voltage at the B-set node and connected between a control transfer line, the control transfer line transferring an external switching control signal, and the B-set node.
31. The shift register according to claim 29 , wherein:
the B-set control signal is a B-start pulse, or a B-carry pulse output from any one of stages operating earlier than the at least one stage, among the plurality of stages; and
the B-reset control signal is a B-carry pulse output from any one of stages operating later than the at least one stage, among the plurality of stages.
32. The shift register according to claim 2 , wherein:
the at least one A1-reset node comprises a first A1-reset node and a second A1-reset node; and
the A-control signal comprises an A1-set control signal, an A1-reset control signal, an A2-set control signal and an A2-reset control signal,
wherein the A1-sub-stage of the at least one stage comprises:
a first A1-switching device controlled by the A1-set control signal and connected between a charging voltage line, the charging voltage line transferring a charging voltage, and the A1-set node;
a second A1-switching device controlled by the A1-reset control signal and connected between the A1-set node and a twelfth discharging voltage line, the twelfth discharging voltage line transferring a twelfth discharging voltage;
a third A1-switching device controlled by a voltage at the first A1-reset node and connected between the A1-set node and a thirteenth discharging voltage line, the thirteenth discharging voltage line transferring a thirteenth discharging voltage;
a fourth A1-switching device controlled by a voltage at the second A1-reset node and connected between the A1-set node and a fourteenth discharging voltage line, the fourteenth discharging voltage line transferring a fourteenth discharging voltage;
a first A1-inverter for controlling the voltage at the first A1-reset node based on the voltage at the A1-set node such that the voltage at the A1-set node and the voltage at the first A1-reset node have opposite logics;
a second A1-inverter for controlling the voltage at the second A1-reset node based on the voltage at the A1-set node such that the voltage at the A1-set node and the voltage at the second A1-reset node have opposite logics;
an A1-carry output switching device controlled by the voltage at the A1-set node and connected between an A1-clock transfer line, the A1-clock transfer line transferring the A1-clock pulse, and the A1-carry output terminal;
a first A1-carry discharge switching device controlled by the voltage at the first A1-reset node and connected between the A1-carry output terminal and a fifteenth discharging voltage line, the fifteenth discharging voltage line transferring a fifteenth discharging voltage; and
a second A1-carry discharge switching device controlled by the voltage at the second A1-reset node and connected between the A1-carry output terminal and the fifteenth sixteenth discharging voltage line.
33. The shift register according to claim 2 , wherein:
the at least one A2-reset node comprises a first A2-reset node and a second A2-reset node; and
the A-control signal comprises an A1-set control signal, an A1-reset control signal, an A2-set control signal and an A2-reset control signal,
wherein the A2-sub-stage of the at least one stage comprises:
a first A2-switching device controlled by the A2-set control signal and connected between a charging voltage line, the charging voltage line transferring a charging voltage, and the A2-set node;
a second A2-switching device controlled by the A2-reset control signal and connected between the A2-set node and a twelfth discharging voltage line, the twelfth discharging voltage line transferring a twelfth discharging voltage;
a third A2-switching device controlled by a voltage at the first A2-reset node and connected between the A2-set node and a thirteenth discharging voltage line, the thirteenth discharging voltage line transferring a thirteenth discharging voltage;
a fourth A2-switching device controlled by a voltage at the second A2-reset node and connected between the A2-set node and a fourteenth discharging voltage line, the fourteenth discharging voltage line transferring a fourteenth discharging voltage;
a first A2-inverter for controlling the voltage at the first A2-reset node based on the voltage at the A2-set node such that the voltage at the A2-set node and the voltage at the first A2-reset node have opposite logics;
a second A2-inverter for controlling the voltage at the second A2-reset node based on the voltage at the A2-set node such that the voltage at the A2-set node and the voltage at the second A2-reset node have opposite logics;
an A2-carry output switching device controlled by the voltage at the A2-set node and connected between an A2-clock transfer line, the A2-clock transfer line transferring the A2-clock pulse, and the A2-carry output terminal;
a first A2-carry discharge switching device controlled by the voltage at the first A2-reset node and connected between the A2-carry output terminal and a fifteenth discharging voltage line, the fifteenth discharging voltage line transferring a fifteenth discharging voltage; and
a second A2-carry discharge switching device controlled by the voltage at the second A2-reset node and connected between the A2-carry output terminal and the fifteenth sixteenth discharging voltage line.
34. The shift register according to claim 2 , wherein:
the at least one B-reset node comprises a first B-reset node and a second B-reset node; and
the B-control signal comprises a B-set control signal and a B-reset control signal,
wherein the B-sub-stage of the at least one stage comprises:
a first B-switching device controlled by the B-set control signal and connected between a charging voltage line, the charging voltage line transferring a charging voltage, and the B-set node;
a second B-switching device controlled by the B-reset control signal and connected between the B-set node and a sixteenth discharging voltage line, the sixteenth discharging voltage line transferring a sixteenth discharging voltage;
a third B-switching device controlled by a voltage at the first B-reset node and connected between the B-set node and a seventeenth discharging voltage line, the seventeenth discharging voltage line transferring a seventeenth discharging voltage;
a fourth B-switching device controlled by a voltage at the second B-reset node and connected between the B-set node and an eighteenth discharging voltage line, the eighteenth discharging voltage line transferring an eighteenth discharging voltage;
a first B-inverter for controlling the voltage at the first B-reset node based on the voltage at the B-set node such that the voltage at the B-set node and the voltage at the first B-reset node have opposite logics;
a second B-inverter for controlling the voltage at the second B-reset node based on the voltage at the B-set node such that the voltage at the B-set node and the voltage at the second B-reset node have opposite logics;
a B-carry output switching device controlled by the voltage at the B-set node and connected between a B-clock transfer line, the B-clock transfer line transferring the B-clock pulse, and the B-carry output terminal;
a first B-carry discharge switching device controlled by the voltage at the first B-reset node and connected between the B-carry output terminal and a nineteenth discharging voltage line, the nineteenth discharging voltage line transferring a nineteenth discharging voltage; and
a second B-carry discharge switching device controlled by the voltage at the second B-reset node and connected between the B-carry output terminal and the nineteenth discharging voltage.
35. The shift register according to claim 3 , wherein the scan output controller further comprises:
a tenth A1-control switching device controlled by the B-carry pulse and connected between the A1-set node and a twenties discharging voltage line, the twenties discharging voltage line transferring a twenties discharging voltage; and
a tenth A2-control switching device controlled by the B-carry pulse and connected between the A2-set node and the twenties discharging voltage line.
36. The shift register according to claim 3 , wherein the scan output controller further comprises:
a first B-control switching device controlled by the B-carry pulse and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device; and
a second B-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B1-scan output switching device and an eleventh discharging voltage line, the eleventh discharging voltage line transferring an eleventh discharging voltage.
37. The shift register according to claim 36 , wherein the scan output controller further comprises at least one of:
a third B-control switching device controlled by an external first signal and connected between the gate electrode of the B1-scan output switching device and a twenty-first discharging voltage line, the twenty-first discharging voltage line transferring a twenty-first discharging voltage;
a fourth B-control switching device controlled by an external second signal and connected between the gate electrode of the B1-scan output switching device and a twenty-second discharging voltage line, the twenty-second discharging voltage line transferring a twenty-second discharging voltage; and
a fifth B-control switching device controlled by an external third signal and connected between the gate electrode of the B1-scan output switching device and a twenty-third discharging voltage line, the twenty-third discharging voltage line transferring a twenty-third discharging voltage.
38. The shift register according to claim 37 , wherein:
the first signal is any one of the A1-carry pulse and the voltage at the A1-set node;
the second signal is any one of the A2-carry pulse and the voltage at the A2-set node; and
the third signal is any one of an A1-start pulse and an A2-start pulse.
39. The shift register according to claim 3 , wherein the scan output controller further comprises:
a first B 1-control switching device controlled by the B-carry pulse and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device;
a second B1-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B1-scan output switching device and an eleventh discharging voltage line, the eleventh discharging voltage line transferring an eleventh discharging voltage;
a first B2-control switching device controlled by the B-carry pulse and connected between the B-carry output terminal and a gate electrode of the B2-scan output switching device; and
a second B2-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B2-scan output switching device and the eleventh discharging voltage line.
40. The shift register according to claim 39 , wherein the scan output controller further comprises at least one of:
a third B1-control switching device controlled by an external first signal and connected between the gate electrode of the B1-scan output switching device and a twenty-first discharging voltage line, the twenty-first discharging voltage line transferring a twenty-first discharging voltage; and
a fourth B1-control switching device controlled by an external second signal and connected between the gate electrode of the B1-scan output switching device and a twenty-second discharging voltage line, the twenty-second discharging voltage line transferring a twenty-second discharging voltage.
41. The shift register according to claim 40 , wherein:
the first signal is any one of the A1-carry pulse and the voltage at the A1-set node; and
the second signal is an A1-start pulse.
42. The shift register according to claim 40 , wherein the scan output controller further comprises at least one of:
a third B2-control switching device controlled by an external third signal and connected between the gate electrode of the B2-scan output switching device and the twenty-first discharging voltage line; and
a fourth B2-control switching device controlled by an external fourth signal and connected between the gate electrode of the B2-scan output switching device and the twenty-second discharging voltage line.
43. The shift register according to claim 42 , wherein:
the third signal is any one of the A2-carry pulse and the voltage at the A2-set node; and
the fourth signal is an A2-start pulse.
44. The shift register according to claim 3 , wherein the scan output controller further comprises:
a first B 1-control switching device controlled by the B-carry pulse and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device;
a second B1-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B1-scan output switching device and an eleventh discharging voltage line, the eleventh discharging voltage line transferring an eleventh discharging voltage;
a first B2-control switching device controlled by a voltage applied to the gate electrode of the B1-scan output switching device and connected between the gate electrode of the B1-scan output switching device and a gate electrode of the B2-scan output switching device; and
a second B2-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B2-scan output switching device and the eleventh discharging voltage line.
45. The shift register according to claim 44 , wherein the scan output controller further comprises at least one of:
a third B1-control switching device controlled by an external first signal and connected between the gate electrode of the B1-scan output switching device and a twenty-first discharging voltage line, the twenty-first discharging voltage line transferring a twenty-first discharging voltage; and
a fourth B1-control switching device controlled by an external second signal and connected between the gate electrode of the B1-scan output switching device and a twenty-second discharging voltage line, the twenty-second discharging voltage line transferring a twenty-second discharging voltage.
46. The shift register according to claim 40 , wherein:
the first signal is any one of the A1-carry pulse and the voltage at the A1-set node; and
the second signal is any one of an A1-start pulse and an A2-start pulse.
47. The shift register according to claim 45 , wherein the scan output controller further comprises at least one of:
a third B2-control switching device controlled by an external third signal and connected between the gate electrode of the B2-scan output switching device and the twenty-first discharging voltage line; and
a fourth B2-control switching device controlled by an external fourth signal and connected between the gate electrode of the B2-scan output switching device and the twenty-second discharging voltage line.
48. The shift register according to claim 42 , wherein:
the third signal is any one of the A2-carry pulse and an A2-set control signal; and
the fourth signal is any one of an A1-start pulse and an A2-start pulse.
49. The shift register according to claim 3 , wherein the scan output controller further comprises:
a first B-control switching device controlled by an external switching control signal and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device; and
a second B-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B1-scan output switching device and an eleventh discharging voltage line, the eleventh discharging voltage line transferring an eleventh discharging voltage.
50. The shift register according to claim 49 , wherein the scan output controller further comprises at least one of:
a third B-control switching device controlled by an external first signal and connected between the gate electrode of the B1-scan output switching device and a twenty-first discharging voltage line, the twenty-first discharging voltage line transferring a twenty-first discharging voltage;
a fourth B-control switching device controlled by an external second signal and connected between the gate electrode of the B1-scan output switching device and a twenty-second discharging voltage line, the twenty-second discharging voltage line transferring a twenty-second discharging voltage; and
a fifth B-control switching device controlled by an external third signal and connected between the gate electrode of the B1-scan output switching device and a twenty-third discharging voltage line, the twenty-third discharging voltage line transferring a twenty-third discharging voltage.
51. The shift register according to claim 50 , wherein:
the first signal is any one of the A1-carry pulse and the voltage at the A1-set node;
the second signal is any one of the A2-carry pulse and the voltage at the A2-set node; and
the third signal is any one of an A1-start pulse and an A2-start pulse.
52. The shift register according to claim 3 , wherein the scan output controller further comprises:
a first B1-control switching device controlled by an external switching control signal and connected between the B-carry output terminal and a gate electrode of the B1-scan output switching device;
a second B1-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B1-scan output switching device and an eleventh discharging voltage line, the eleventh discharging voltage line transferring an eleventh discharging voltage;
a first B2-control switching device controlled by the switching control signal and connected between the B-carry output terminal and a gate electrode of the B2-scan output switching device; and
a second B2-control switching device controlled by the voltage at the B-reset node and connected between the gate electrode of the B2-scan output switching device and the eleventh discharging voltage line.
53. The shift register according to claim 52 , wherein the scan output controller further comprises at least one of:
a third B1-control switching device controlled by an external first signal and connected between the gate electrode of the B1-scan output switching device and a twenty-first discharging voltage line, the twenty-first discharging voltage line transferring a twenty-first discharging voltage; and
a fourth B1-control switching device controlled by an external second signal and connected between the gate electrode of the B1-scan output switching device and a twenty-second discharging voltage line, the twenty-second discharging voltage line transferring a twenty-second discharging voltage.
54. The shift register according to claim 53 , wherein:
the first signal is any one of the A1-carry pulse and the voltage at the A1-set node; and
the second signal is any one of an A1-start pulse and an A2-start pulse.
55. The shift register according to claim 53 , wherein the scan output controller further comprises at least one of:
a third B2-control switching device controlled by an external third signal and connected between the gate electrode of the B2-scan output switching device and the twenty-first discharging voltage line; and
a fourth B2-control switching device controlled by an external fourth signal and connected between the gate electrode of the B2-scan output switching device and the twenty-second discharging voltage line.
56. The shift register according to claim 55 , wherein:
the third signal is any one of the A2-carry pulse and an A2-set control signal; and
the fourth signal is any one of an A1-start pulse and an A2-start pulse.
57. The shift register according to claim 26 , wherein:
the A2-set control signal is an A2-start pulse, or an A2-carry pulse output from any one of stages operating earlier than the at least one stage, among the plurality of stages;
the A2-reset control signal is an A2-carry pulse output from any one of stages operating later than the at least one stage, among the plurality of stages; and
the A1-start pulse and the A2-start pulse are the same.