GOA circuit, method for driving the same and display panel

1. A Gate Driver on Array (GOA) circuit, comprising:

a plurality of GOA sub-circuits,

wherein each of the GOA sub-circuits comprises:

a plurality of cascaded shift register units, each one of the GOA sub-circuits is connected to an independent start signal terminal and receives a start signal from the independent start signal terminal used only for the one of the GOA sub-circuits, the respective GOA sub-circuits receive the corresponding start signals that are independent from each other, and the start signals of different ones of the GOA sub-circuits are separated by a time interval for acquisition of touch signals; and

a plurality of cascaded dummy shift register units connected to ends of the plurality of cascaded shift register units, wherein the dummy shift register units are configured to provide a reset signal for at least one of the plurality of cascaded shift register units at an end of the GOA sub-circuits;

a plurality of clock signal terminals, wherein a number of the dummy shift register units is equal to one-half of a number of the clock signal terminals; and

a noise cancelling control signal terminal configured to output a noise cancelling control signal at a touch phase, wherein responsive to the noise cancelling control signal, each of the shift register units outputs a preset signal generated by at least one of the clock signal terminals, and the preset signal has the same waveform with at least one of the touch signals and a data signal.

2. The GOA circuit according to claim 1 , wherein the shift register unit comprises:

an input module that is connected to an input signal terminal, a first power signal terminal and a pull-up node, wherein the input module is configured to transmit the first power signal to the pull-up node in response to an input signal;

a reset module that is connected to a reset signal terminal, a second power signal terminal, and the pull-up node, wherein the reset module is configured to transmit a second power signal to the pull-up node in response to the reset signal;

a noise cancelling control module that is connected to the noise cancelling control signal terminal and the pull-up node, wherein the noise cancelling control module is configured to transmit the noise cancelling control signal to the pull-up node in response to the noise cancelling control signal;

an output module that is connected to at least one of the clock signal terminals, the pull-up node, and a signal output terminal, wherein the output module is configured to transmit a clock signal to the signal output terminal in response to a voltage signal of the pull-up node;

a pull-down control module that is connected to the first power signal terminal, the pull-up node, the second power signal terminal, and a pull-down node, wherein the pull-down control module is configured to transmit the first power signal to the pull-down node in response to the first power signal, and transmit the second power signal to the pull-down node in response to the voltage signal of the pull-up node;

a pull-down module that is connected to the pull-down node, the second power signal terminal, the pull-up node, and the signal output terminal, wherein the pull-down module is configured to transmit the second power signal to the pull-up node and the signal output terminal in response to the voltage signal of the pull-down node.

3. The GOA circuit according to claim 1 , wherein the GOA circuit is further connected to a timing controller, and is configured to acquire signal variation of adjacent two frame screens corresponding to respective ones of the GOA sub-circuits detected by the timing controller; and the start signals corresponding to the respective GOA sub-circuits are sequentially output in a next frame according to a degree of the signal variation.

4. A gate driving method for driving a Gate Driver on Array (GOA) circuit, wherein the GOA circuit comprises: a plurality of GOA sub-circuits, wherein each of the GOA sub-circuits comprises a plurality of cascaded shift register units, each one of the GOA sub-circuits is connected to an independent start signal terminal and receives a start signal from independent start signal terminal used only for the one of the GOA sub-circuits, the respective GOA sub-circuits receive the corresponding start signals that are independent from each other, and the start signals of different ones of the GOA sub-circuits are separated by a time interval for acquisition of touch signals, wherein each of the GOA sub-circuits further comprises a plurality of cascaded dummy shift register units connected to ends of the plurality of cascaded shift register units, wherein the dummy shift register units are configured to provide a reset signal for at least one of the plurality of cascaded shift register units at an end of the GOA sub-circuits; and wherein the GOA circuit further comprises a plurality of clock signal terminals; and a number of the dummy shift register units is equal to one-half of a number of the clock signal terminals, and the method comprises:

providing the independent start signal to each one of the GOA sub-circuits in turn such that the plurality of cascaded shift register units in the one of the GOA sub-circuits sequentially output a plurality of rows of scan signals;

wherein the start signals of different ones of the GOA sub-circuits are separated by the time interval for acquisition of the touch signals, and

wherein the GOA circuit further comprises a noise cancelling control signal terminal, the gate driving method further comprises:

in a touch phase, outputting a noise cancelling control signal to all shift register units, responsive to the noise cancelling control signal, each of the shift register units outputs a preset signal generated by a clock signal terminal, wherein the preset signal has the same waveform with at least one of the touch signals and a data signal.

5. The gate driving method according to claim 4 , wherein the gate driving method further comprises:

acquiring signal variation of adjacent two frame screens corresponding to the respective GOA sub-circuits detected by a timing controller, and sequentially outputting a first start signal and a second start signal in a next frame according to a degree of the signal variation.

6. A display panel, comprising:

a Gate Driver on Array (GOA) circuit, wherein the GOA circuit comprises:

a plurality of GOA sub-circuits, wherein each of the GOA sub-circuits comprises:

a plurality of cascaded shift register units, each one of the GOA sub-circuits is connected to an independent start signal terminal and receives a start signal from the independent start signal terminal used only for the one of the GOA sub-circuits, the respective GOA sub-circuits receive the corresponding start signals that are independent from each other, and the start signals of different ones of the GOA sub-circuits are separated by a time interval for acquisition of touch signals; and

a plurality of cascaded dummy shift register units connected to ends of the plurality of cascaded shift register units, wherein the dummy shift register units are configured to provide a reset signal for at least one of the plurality of cascaded shift register units at an end of the GOA sub-circuits;

a plurality of clock signal terminals, wherein a number of the dummy shift register units is equal to one-half of a number of the clock signal terminals; and

a noise cancelling control signal terminal configured to output a noise cancelling control signal at a touch phase, wherein responsive to the noise cancelling control signal, each of the shift register units outputs a preset signal generated by at least one of the clock signal terminals, and the preset signal has the same waveform with at least one of the touch signals and a data signal.