Shift-register unit, a gate-driving circuit and driving method, and a display apparatus

1. A gate-driving circuit comprising multiple shift-register units cascaded electrically in multiple stages;

wherein the multiple shift-register units comprises a shift-register unit;

wherein the shift-register unit comprises:

a main sub-circuit configured to generate an output signal for driving a gate line scanning of current stage and to charge a pull-up node of next stage to a high-voltage level; and

a control sub-circuit coupled to the main sub-circuit and a shift-register unit of previous stage, the control sub-circuit being configured to recharge a pull-up node of previous stage during a touch-control operation performed after a gate line scanning of previous stage ends and before the gate line scanning of current stage starts;

wherein the multiple shift-register units comprise a single series of shift-register units cascaded from a 1st-stage to an N-th stage with a respective even-numbered stage adjacently coupled to a respective odd-numbered stage,

a respective shift-register unit of odd-numbered stage comprises a timing-control port coupled to a first clock signal line and a control sub-circuit including a switch transistor having a first terminal coupled to a first control line;

a respective shift-register unit of even-numbered stage comprises a timing-control port coupled to a second clock signal line and a control sub-circuit including a switch transistor having a first terminal coupled to a second control line;

wherein for any two adjacently cascaded stages in the single series, an output port of a shift-register unit of current stage is coupled to a reset port of a shift-register unit of previous stage and an input port of the shift-register unit of current stage is coupled to an output port of the shift-register unit of previous stage.

2. A gate-driving circuit comprising multiple shift-register units cascaded electrically in multiple stages;

wherein the multiple shift-register units comprises a shift-register unit;

wherein the shift-register unit comprises:

a main sub-circuit configured to generate an output signal for driving a gate line scanning of current stage and to charge a pull-up node of next stage to a high-voltage level; and

a control sub-circuit coupled to the main sub-circuit and a shift-register unit of previous stage, the control sub-circuit being configured to recharge a pull-up node of previous stage during a touch-control operation performed after a gate line scanning of previous stage ends and before the gate line scanning of current stage starts;

wherein the multiple shift-register units comprise a first series of shift-register units of all odd-numbered stages cascaded electrically one after another and a second series of shift-register units of all even-numbered stages cascaded electrically one after another;

wherein a respective shift-register unit of (2n−1)-th stage in the first series comprises a timing-control port coupled to a first clock signal line and a control sub-circuit including a switch transistor having a first terminal coupled to a first control line;

a respective shift-register unit of (2n)-th stage in the second series adjacent to the respective shift-register unit of (2n−1)-th stage in the first series comprises a timing-control port coupled to a second clock signal line and a control sub-circuit including a switch transistor having a first terminal coupled to a second control line;

a respective shift-register unit of (2n+1)-th stage in the first series adjacent to the respective shift-register unit of (2n)-th stage in the second series comprises a timing-control port coupled to a third clock signal line and a control sub-circuit including a switch transistor having a first terminal coupled to third control line; and

a respective shift-register unit of (2n+2)-th stage in the second series adjacent to the respective shift-register unit of (2n+1)-th stage in the first series comprises a timing-control port coupled to a fourth clock signal line and a control sub-circuit including a switch transistor having a first terminal coupled to fourth control line;

wherein n is an integer equal to or greater than 1.

3. A display apparatus comprising:

a gate driving circuit comprising multiple shift-register units cascaded electrically in multiple stages; wherein the multiple shift-register units comprises a shift-register unit: wherein the shift-register unit comprises: a main sub-circuit configured to generate an output signal for driving a gate line scanning of current stage and to charge a pull-up node of next stage to a high-voltage level; and a control sub-circuit coupled to the main sub-circuit and a shift-register unit of previous stage, the control sub-circuit being configured to recharge a pull-up node of previous stage during a touch-control operation performed after a gate line scanning of previous stage ends and before the gate line scanning of current stage starts, wherein the multiple shift-register units comprise a single series of shift-register units cascaded from a 1st-stage to an N-th stage with a respective even-numbered stage adjacently coupled to a respective odd-numbered stage, a respective shift-register unit of odd-numbered stage comprises a timing-control port coupled to a first clock signal line and a control sub-circuit including a switch transistor having a first terminal coupled to a first control line;

a respective shift-register unit of even-numbered stage comprises a timing-control port coupled to a second clock signal line and a control sub-circuit including a switch transistor having a first terminal coupled to a second control line;

wherein for any two adjacently cascaded stages in the single series, an output port of a shift-register unit of current stage is coupled to a reset port of a shift-register unit of previous stage and an input port of the shift-register unit of current stage is coupled to an output port of the shift-register unit of previous stage.

4. A method of driving a gate-driving circuit comprising multiple shift-register units cascaded electrically in multiple stages;

wherein the multiple shift-register units comprises a shift-register unit;

wherein the shift-register unit comprises:

a main sub-circuit configured to generate an output signal for driving a gate line scanning of current stage and to charge a pull-up node of next stage to a high-voltage level; and

a control sub-circuit coupled to the main sub-circuit and a shift-register unit of previous stage, the control sub-circuit being configured to recharge a pull-up node of previous stage during a touch-control operation performed after a gate line scanning of previous stage ends and before the gate line scanning of current stage starts;

the method comprising:

performing a gate line scanning of previous stage before entering a touch period;

performing a touch-control operation during the touch period;

performing an internal voltage compensation to the shift-register unit of previous stage before the touch period ends;

repeating the gate line scanning of previous stage based on the internal voltage compensation after the touch period ends; and

performing a gate line scanning of current stage;

wherein performing the gate line scanning of previous stage comprises:

providing a first clock signal at a turn-on level to the main sub-circuit in the shift-register unit of previous stage in a first charging period and a second clock signal at a turn-off level to the main sub-circuit in a shift-register unit of current stage in a repeat-driving period, thereby outputting a gate-driving signal at the turn-on level to a gate line of previous stage; and

using the gate-driving signal outputted from the shift-register unit of previous stage to charge a pull-up node in the shift-register unit of current stage up to the turn-on level in the first charging period.

5. The method of claim 4 , wherein the performing the touch-control operation comprises providing no clock signal to the shift-register unit of previous stage and the shift-register unit of current stage to substantially maintain the turn-on level at the pull-up node in the shift-register unit of current stage and a pull-up node in the shift-register unit of previous stage in the touch period after the first charging period.

6. The method of claim 5 , wherein the performing an internal voltage compensation comprises providing a control voltage to a control signal line of the control sub-circuit in the shift-register unit of current stage in a second charging period before the touch period ends to charge the pull-up node of the shift-register unit of previous stage back to the turn-on level.

7. The method of claim 6 , wherein the repeating the gate line scanning of previous stage comprises providing the first clock signal at a turn-on level to the shift-register unit of previous stage in a repeat-driving period after the touch period ends and the second clock signal at a turn-off level to the shift-register unit of current stage in the repeat-driving period, thereby outputting a gate-driving signal at the turn-on level to the gate line of previous stage and perform an internal voltage compensation to the shift-register unit of current stage.

8. The method of claim 7 , wherein the performing a gate line scanning of current stage comprises providing the second clock signal at the turn-on level to the main sub-circuit in the shift-register unit of current stage and the first clock signal at a turn-off level to the shift-register unit of previous stage, thereby outputting a gate-driving signal at the turn-on level to a gate line of current stage in a continue-scanning period after the repeat-driving period.

9. The method of claim 4 , further comprising performing a touch-control operation after performing a gate line scanning of previous stage adjacently cascaded to current stage.

10. The method of claim 9 , wherein the multiple shift-register units comprise a single series of shift-register units cascaded from a 1st-stage to an N-th stage, wherein the performing a gate line scanning comprises,

providing a first clock signal to a timing-control port of a shift-register unit of odd-numbered stage and a second clock signal to the timing-control port of a shift-register unit of even-numbered stage; and

wherein the performing the touch-control operation comprises:

suspending the first clock signal and the second clock signal in a touch period; and

providing a first control signal to the control sub-circuit of the shift-register unit of odd-numbered stage and a second control signal to the control sub-circuit of the shift-register unit of even-numbered stage at an end of the touch period.

11. The method of claim 9 , wherein the multiple shift-register units comprise a first series of shift-register units of all odd-numbered stages cascaded electrically one after another and a second series of shift-register units of all even-numbered stages cascaded electrically one after another;

wherein the performing a gate line scanning comprises,

providing a first clock signal to a timing-control port of a shift-register unit of (2n−1)-th stage in the first series, a second clock signal to the timing-control port of a shift-register unit of (2n)-th stage in the second series, a third clock signal to the timing-control port of a shift-register unit of (2n+1)-th stage in the first series, and a fourth clock signal to the timing-control port of the shift-register unit of (2n+2)-th stage in the second series; wherein the third clock signal, the fourth clock signal, the first clock signal, and the second clock signal are characterized by a pulse period and loaded with a same turn-on level sequentially in time with a relatively delayed by ¼ of the pulse period; and

wherein the performing the touch-control operation comprises,

suspending the first clock signal, the second clock signal, the third clock signal, and the fourth clock signal in a touch period;

providing a first control signal to the control sub-circuit of the shift-register unit of (2n−1)-th stage in the first series, a second control signal to the control sub-circuit of the shift-register unit of (2n)-th stage in the second series, a third control signal to the control sub-circuit of the shift-register unit of (2n+1)-th stage in the first series, and a fourth control signal to the control sub-circuit of the shift-register unit of (2n+2)-th stage in the second series at an end of the touch period;

wherein the third control signal and the fourth control signal are characterized by the pulse period and loaded with a same turn-on level sequentially in time with a delay of ¼ of the pulse period, the first control signal and the second control signal are characterized by a same turn-off level;

wherein n is an integer no smaller than 1.

12. The method of claim 11 , further comprising, before stopping the touch period after performing the gate line scanning of the (2n)-th stage, providing a third control signal to the control sub-circuit of the shift-register unit of (2n+1)-th stage in the first series and subsequently or at the same time providing a fourth control signal to the control sub-circuit of the shift-register unit of (2n+2)-th stage in the second series.

13. The gate-driving circuit of claim 1 , wherein the main sub-circuit comprises a pull-up node, the control sub-circuit comprises a switch transistor and a control line configured to be provided with a control signal, the switch transistor having a gate coupled to the pull-up node, a first terminal coupled to the control line, and a second terminal coupled to an input port of the shift-register unit of previous stage.

14. The gate-driving circuit of claim 13 , wherein the switch transistor comprises an NPN-type transistor.

15. The gate-driving circuit of claim 13 , wherein the switch transistor comprises an PNP-type transistor.

16. The gate-driving circuit of claim 1 , wherein the main sub-circuit comprises an output port coupled to a reset port of the shift-register unit of previous stage and an input port coupled to an output port of the shift-register unit of previous stage.