Gate driving unit, driving method thereof and display panel

Abstract

The embodiment of the invention discloses a gate driving unit, a driving method thereof and a display panel, the gate driving unit comprises an input module, an output module and a first output control module, the output end of the input module and the control end of the output module are connected to a first node, the output module is used for outputting a gate driving signal in response to the voltage of the first node; the control end of the first output control module is connected with a touch control signal, the first output control module is connected between the first potential signal line and the output end of the output module, and the first output control module is used for responding to the touch control signal in the touch control stage and transmitting a first potential signal on the first potential signal line to the output end of the output module. And in a display stage, responding to the touch control signal to relieve the control on the potential of the output end of the output module. According to the scheme, the problem of brightness difference caused by output difference of the gate driving signal at different positions can be eliminated, the uniformity of display brightness can be improved, and the display effect is further improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of display technology, and in particular to a gate driving unit and a driving method thereof, and a display panel. Background Art

[0002] With the rapid development of display technology, touch display panels are widely used in various electronic products. According to the location of the touch sensor, the touch display panel can be divided into Out cell (touch sensor is mounted outside the display panel), On cell (touch sensor is set on the display panel) and In cell (touch sensor is integrated into the display panel) architectures.

[0003] In the display panel of the In cell architecture, a gate drive circuit is usually used to provide the panel with a corresponding gate drive signal to realize the normal display function of the panel. However, in the touch stage, the gate drive circuit is required to stop the level transmission of the gate drive signal. Therefore, in the touch stage, the corresponding clock signal and the reference voltage signal are usually provided with a "touch pit" time period to realize the touch function. Among them, the signal in the "touch pit" period is different from the signal in the non-touch pit period. However, due to the existence of the "touch pit" time, the gate drive signals output by the gate drive circuit at different positions are different, resulting in brightness differences at different positions, resulting in the appearance of horizontal stripes on the display, affecting the display effect. Summary of the invention

[0004] The embodiment of the present invention provides a gate driving unit and a driving method thereof and a display panel to improve display effect.

[0005] According to one aspect of the present invention, there is provided a gate driving unit, comprising:

[0006] an input module, wherein an output end of the input module is connected to a first node, and the input module is used to precharge the first node in response to a first control signal;

[0007] an output module, wherein a control end of the output module is connected to the first node, and the output module is used to output a gate drive signal in response to a voltage of the first node;

[0008] A first output control module, wherein the control end of the first output control module is connected to a touch control signal, the first output control module is connected between a first potential signal line and the output end of the output module, the first output control module is used to respond to the touch control signal in a touch stage, transmit the first potential signal on the first potential signal line to the output end of the output module to stabilize the potential of the output end of the output module, and release the control of the potential of the output end of the output module in response to the touch control signal in a display stage.

[0009] Optionally, the input end of the output module is connected to a first clock signal, and in the touch control stage, the first clock signal is a synchronization signal of the touch control signal, and in the display stage, the first clock signal is a clock pulse signal;

[0010] In the touch control stage, the first potential signal is a synchronization signal of the touch control signal, and in the display stage, the first potential signal is a fixed voltage signal.

[0011] Optionally, it further includes a second output control module and a first voltage control module;

[0012] The input end of the second output control module is connected to the first potential signal line, the output end of the second output control module and the output end of the output module are connected to a second node, the control end of the second output control module is connected to a second clock signal, and the second output control module is used to control the potential of the second node in response to the second clock signal;

[0013] The first voltage control module includes a driving control unit and a stabilization unit, the control end of the driving control unit is connected to the first node, the output end of the driving control unit is connected to the control end of the stabilization unit, the input end of the stabilization unit is connected to the first potential signal line, the output end of the stabilization unit is connected to the first node and the second node respectively, and the stabilization unit is used to control the potential of the first node and the potential of the second node in response to the voltage of the output end of the driving control unit when the output module is turned off;

[0014] It also includes a second voltage control module, the control end of the second voltage control module is connected to a second control signal, the input end of the second voltage control module is connected to a second potential signal line, the output end of the second voltage control module is connected to the first node, and the second voltage control module is used to transmit the second potential signal on the second potential signal line to the first node in response to the second control signal; wherein the input module and the second voltage control module are turned on in a time-sharing manner.

[0015] Optionally, a third voltage control module is also included, wherein the control end of the third voltage control module is connected to the touch control signal, the input end of the third voltage control module is connected to the first potential signal line, and the output end of the third voltage control module is connected to the output end of the drive control unit. The third voltage control module is used to transmit the first potential signal to the output end of the drive control unit during the touch stage to maintain the voltage at the output end of the drive control unit and turn off the stabilization unit.

[0016] Optionally, the input module includes a first transistor, the output module includes a second transistor and a capacitor, the first output control module includes a third transistor, the second output control module includes a fourth transistor, the drive control unit includes a fifth transistor and a sixth transistor, the stabilization unit includes a seventh transistor and an eighth transistor, the second voltage control module includes a ninth transistor, and the third voltage control module includes a tenth transistor;

[0017] The gate of the first transistor is connected to the first control signal, the first electrode of the first transistor is connected to the third potential signal line, the second electrode of the first transistor is connected to the first node, the gate of the second transistor is connected to the first node, the first electrode of the second transistor is connected to the first clock signal, the second electrode of the second transistor is connected to the second node, and the capacitor is connected between the first node and the second node;

[0018] The gate of the third transistor is connected to the touch control signal, the first electrode of the third transistor is connected to the first potential signal line, and the second electrode of the third transistor is connected to the second node;

[0019] The gate of the fourth transistor is connected to the second clock signal, the first electrode of the fourth transistor is connected to the first potential signal line, and the second electrode of the fourth transistor is connected to the second node;

[0020] The first electrode and the gate of the fifth transistor are both connected to the fourth potential signal line, the second electrode of the fifth transistor and the second electrode of the sixth transistor are connected to a third node, the first electrode of the sixth transistor is connected to the first potential signal line, the gate of the sixth transistor is connected to the first node, the gate of the seventh transistor and the gate of the eighth transistor are both connected to the third node, the first electrode of the seventh transistor and the first electrode of the eighth transistor are both connected to the first potential signal line, the second electrode of the seventh transistor is connected to the first node, and the second electrode of the eighth transistor is connected to the second node;

[0021] The gate of the ninth transistor is connected to the second control signal, the first electrode of the ninth transistor is connected to the second potential signal line, and the second electrode of the ninth transistor is connected to the first node;

[0022] The gate of the tenth transistor is connected to the touch control signal, the first electrode of the tenth transistor is connected to the first potential signal line, and the second electrode of the tenth transistor is connected to the third node;

[0023] Among them, the voltage value of the first potential signal transmitted on the first potential signal line is less than or equal to the voltage value of the second potential signal transmitted on the second potential signal line, the voltage value of the third potential signal transmitted on the third potential signal line is greater than the voltage value of the second potential signal, and the voltage value of the fourth potential signal transmitted on the fourth potential signal line is greater than the voltage value of the second potential signal and less than the voltage value of the third potential signal.

[0024] Optionally, a fourth voltage control module is further included, and the fourth voltage control module is used to control the potential of the first node in the touch control stage to keep the output module turned on;

[0025] The fourth voltage control module includes a first subunit and a second subunit, the control end and the input end of the first subunit are both connected to the touch control signal, the output end of the first subunit is connected to the input end of the second subunit, and the output end and the control end of the second subunit are both connected to the first node;

[0026] The first subunit includes an eleventh transistor, the second subunit includes a twelfth transistor, the first electrode and the gate of the eleventh transistor are both connected to the touch control signal, the second electrode of the eleventh transistor is connected to the first electrode of the twelfth transistor, and the second electrode and the gate of the twelfth transistor are both connected to the first node.

[0027] According to another aspect of the present invention, there is provided a driving method of a gate driving unit, comprising:

[0028] In the display stage, the control input module charges the first node in response to the first control signal of its own control terminal, and the control output module outputs a gate drive signal in response to the voltage of the first node;

[0029] In the touch control stage, the first output control module is controlled to respond to the touch control signal of its own control end, and transmit the first potential signal on the first potential signal line to the control end of the output module to stabilize the potential of the output end of the output module.

[0030] The input end of the input module is connected to the third potential signal line, the input end of the output module is connected to the first clock signal, the gate driving unit also includes a second output control module, a first voltage control module, a second voltage control module, a third voltage control module and a fourth voltage control module, the input end of the second output control module is connected to the first potential signal line, the output end of the second output control module and the output end of the output module are connected to a second node, the control end of the second output control module is connected to the second clock signal, the first voltage control module includes a driving control unit and a stabilization unit, the control end of the driving control unit is connected to the first node, the output end of the driving control unit is connected to the control end of the stabilization unit, the input end of the stabilization unit is connected to the first potential signal line, and the stabilization unit The output end of the element is connected to the first node and the second node respectively, the control end of the second voltage control module is connected to the second control signal, the input end of the second voltage control module is connected to the second potential signal line, the output end of the second voltage control module is connected to the first node, the control end of the third voltage control module is connected to the touch control signal, the input end of the third voltage control module is connected to the first potential signal line, the output end of the third voltage control module is connected to the output end of the driving control unit, the fourth voltage control module includes a first subunit and a second subunit, the control end and the input end of the first subunit are both connected to the touch control signal, the output end of the first subunit is connected to the input end of the second subunit, and the output end and the control end of the second subunit are both connected to the first node;

[0031] In the display stage, the driving method of the gate driving unit includes:

[0032] In the first sub-stage, the input module is controlled to transmit the third potential signal on the third potential signal line to the first node to precharge the first node, and the output module is controlled to output a first level pulse signal of the first clock signal;

[0033] In the second sub-stage, the first clock signal jumps from a first-level pulse signal to a second-level pulse signal, the output module is controlled to adjust the voltage of the first node according to the jump of the first clock signal, and output the second-level pulse signal of the first clock signal;

[0034] In the third sub-stage, the second voltage control module is controlled to transmit the second potential signal on the second potential signal line to the first node, the driving control unit is controlled to drive the stabilization unit to transmit the first potential signal on the first potential signal line to the first node according to the voltage of the first node, and the second output control module is controlled to transmit the first potential signal to the second node;

[0035] In the touch control stage, the driving method of the gate driving unit includes:

[0036] In the touch stage, the first output control module is controlled to transmit the first potential signal to the second node, the third voltage control module is controlled to transmit the first potential signal to the output end of the driving control unit, and the fourth voltage control module is controlled to transmit the touch control signal to the first node.

[0037] Optionally, within a display cycle, the display phase, the touch phase and a blank phase are included, and the blank phase is located between two adjacent display cycles;

[0038] In the touch stage and the blank stage, the potential of the touch control signal is the same and different from the potential of the touch control signal in the display stage.

[0039] According to another aspect of the present invention, a display panel is provided. The display panel includes a gate driving circuit. The gate driving circuit includes a plurality of gate driving units provided by any embodiment of the present invention. The plurality of gate driving units are connected in cascade.

[0040] The technical solution provided by the embodiment of the present invention is to set a first output control module at the output end of the output module. In the touch stage, the first output control module is controlled to respond to the touch control signal to transmit the first potential signal to the control end of the output module to control the potential of the gate drive signal, thereby ensuring that the gate drive signals corresponding to all pixel rows in the surface are the same, and are all first potential signals, thereby eliminating the brightness difference problem caused by the output difference of the gate drive signal at different positions, which is beneficial to improving the uniformity of the display brightness and further improving the display effect.

[0041] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 A schematic diagram of the structure of a gate driving unit provided by an embodiment of the present invention;

[0044] Figure 2 A schematic structural diagram of another gate driving unit provided by an embodiment of the present invention;

[0045] Figure 3 A schematic diagram of a driving waveform of a gate driving unit provided by an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of the structure of another gate driving unit provided by an embodiment of the present invention;

[0047] Figure 5 A schematic diagram of the structure of another gate driving unit provided by an embodiment of the present invention;

[0048] Figure 6 A schematic structural diagram of another gate driving unit provided by an embodiment of the present invention;

[0049] Figure 7 A schematic diagram of a driving waveform of another gate driving unit provided by an embodiment of the present invention;

[0050] Figure 8 A schematic structural diagram of another gate driving unit provided by an embodiment of the present invention;

[0051] Fig. 9 A flow chart of a driving method of a gate driving unit provided by an embodiment of the present invention;

[0052] Fig.10 A flowchart of another driving method of a gate driving unit provided by an embodiment of the present invention;

[0053] Fig.11 A schematic diagram of a driving waveform of another gate driving unit provided by an embodiment of the present invention;

[0054] Fig.12 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0055] Fig.13 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0056] Fig.14 A waveform diagram of a clock signal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] Figure 1 The present invention provides a schematic diagram of a gate driving unit structure, the gate driving unit can form a gate driving circuit in a cascade manner, and the gate driving circuit outputs gate driving signals step by step. Figure 1 , the gate driving unit provided in this embodiment includes:

[0060] An input module 110, where an output end of the input module 110 is connected to the first node N1, and the input module 110 is used to precharge the first node N1 in response to a first control signal Gn-4;

[0061] An output module 120, wherein a control terminal of the output module 120 is connected to the first node N1, and the output module 120 is used to output a gate driving signal Gn in response to a voltage of the first node N1;

[0062] The first output control module 130, the control end of the first output control module 130 is connected to the touch control signal TP-C, the first output control module 130 is connected between the first potential signal line and the output end of the output module 120, the first output control module 130 is used to respond to the touch control signal TP-C in the touch stage, transmit the first potential signal VGL1 on the first potential signal line to the output end of the output module 120 to stabilize the potential of the output end of the output module 120, and respond to the touch control signal TP-C in the display stage to release the control of the potential of the output end of the output module 120.

[0063] Among them, in the touch stage, the output of the gate driving unit is usually suspended by a stop signal, which can be a low-level signal or a high-level signal, and the current in the circuit is detected by the touch signal transmitted in the reference voltage signal (Vcom), thereby detecting the touch effect. However, in the touch stage, not all the output modules 120 of the gate driving units corresponding to all rows of pixels are in the off state, and the output modules 120 of the gate driving units corresponding to some rows of pixels are in the on state. Therefore, the gate driving signals Gn between some rows are inconsistent, resulting in differences in the lower pixel voltages of the corresponding rows, resulting in the phenomenon of displaying horizontal stripes in the touch stage, resulting in poor display.

[0064] In this embodiment, by setting the first output control module 130 at the output end of the output module 120, in the touch stage, the first output control module 130 is turned on by the touch control signal TP-C, and the first output control module 130 transmits the first potential signal VGL1 on the first potential signal line to the output end of the output module 120, and performs pull-down control on the gate drive signal Gn, so that the gate drive signals Gn of all rows are consistent. In the display stage, the first output control module 130 is turned off in response to the touch control signal TP-C, and the control of the output end potential of the output module 120 is released, and the output module 120 outputs the gate drive signal Gn normally.

[0065] The technical solution provided by the embodiment of the present invention is to set a first output control module at the output end of the output module. In the touch stage, the first output control module is controlled to respond to the touch control signal to transmit the first potential signal to the control end of the output module to control the potential of the gate drive signal, thereby ensuring that the gate drive signals corresponding to all pixel rows in the surface are the same, and are all first potential signals, thereby eliminating the brightness difference problem caused by the output difference of the gate drive signal at different positions, which is beneficial to improving the uniformity of the display brightness and further improving the display effect.

[0066] Figure 2 A schematic diagram of the structure of another gate driving unit provided by an embodiment of the present invention, Figure 3 A schematic diagram of a driving waveform of a gate driving unit provided in an embodiment of the present invention, referring to Figure 2 and Figure 3 On the basis of the above embodiment, optionally, the input end of the output module 120 is connected to the first clock signal CLK1. In the touch stage, the first clock signal CLK1 is a synchronization signal of the touch signal TP, and in the display stage, the first clock signal CLK1 is a clock pulse signal; in the touch stage, the first potential signal VGL1 is a synchronization signal of the touch signal TP, and in the display stage, the first potential signal VGL1 is a fixed voltage signal.

[0067] Specifically, in the display stage, the output module 120 is used to transmit the first clock signal CLK1 to the output end of the output module 120 according to the voltage of the first node N1, and the first potential signal VGL1 and the reference voltage signal Vcom are both fixed voltage signals to output the gate driving signal Gn.

[0068] In the touch stage, the first clock signal CLK1 and the first potential signal VGL1 are both synchronization signals of the touch signal TP in the reference voltage Vcom, that is, the waveforms of the first clock signal CLK1 and the first potential signal VGL1 in the touch stage are the same as the waveforms of the touch signal TP, which is conducive to the acquisition of the in-plane signal. When entering the touch stage, the first output control module 130 responds to the touch control signal TP-C to be turned on, transmits the first potential signal VGL1 to the output end of the output module 120, and pulls the gate drive signal Gn to the first potential signal VGL1. At this time, the gate drive signal Gn is a synchronization signal of the touch signal TP, which eliminates the problem of uneven display caused by the difference in the gate drive signal GN at different positions in the surface, which is conducive to improving the abnormal problem of displaying horizontal stripes.

[0069] Figure 4 A schematic diagram of another gate driving unit provided in an embodiment of the present invention is provided. Figure 4 On the basis of the above embodiment, optionally, the gate driving unit provided in this embodiment further includes a second output control module 140 and a first voltage control module 150. The input end of the second output control module 140 is connected to the first potential signal line, the output end of the second output control module 140 and the output end of the output module 120 are connected to the second node N2, the control end of the second output control module 140 is connected to the second clock signal CLK2, and the second output control module 140 is used to control the potential of the second node N2 in response to the second clock signal CLK2.

[0070] Specifically, in the display stage, when the output module 120 is turned off in response to the voltage of the first node N1, the second output control module 140 can be turned on in response to the second clock signal CLK2 to pull the voltage of the second node N2 to the voltage of the first potential signal VGL1, thereby maintaining the stability of the voltage of the second node N2 and further ensuring the stable output of the gate drive signal Gn.

[0071] The first voltage control module 150 includes a driving control unit 1501 and a stabilization unit 1502, the control end of the driving control unit 1501 is connected to the first node N1, the output end of the driving control unit 1501 is connected to the control end of the stabilization unit 1502, the input end of the stabilization unit 1502 is connected to the first potential signal line, and the output end of the stabilization unit 1502 is respectively connected to the first node N1 and the second node N2. The stabilization unit 1502 is used to control the potential of the first node N1 and the potential of the second node N2 in response to the voltage at the output end of the driving control unit 1501 when the output module 120 is turned off.

[0072] Among them, when the output module 120 is turned off in response to the voltage of the first node N1, the driving control unit 1501 controls the stabilization unit 1502 to be turned on in response to the voltage of the first node N1, and the stabilization unit 1502 transmits the first potential signal VGL1 to the first node N1 to maintain the shutdown potential of the first node N1, ensuring better shutdown of the output module 120. At the same time, the stabilization unit 1502 also transmits the first potential signal VGL1 to the second node N2 to further maintain the potential of the second node N2, thereby maintaining the stability of the gate drive signal Gn output.

[0073] When the output module 120 is turned on in response to the voltage of the first node N1, the driving control unit 1501 controls the stabilizing unit 1502 to be turned off in response to the voltage of the first node N1.

[0074] Optionally, continue to refer to Figure 4 The gate driving unit also includes a second voltage control module 160, the control end of the second voltage control module 160 is connected to the second control signal Gn+4, the input end of the second voltage control module 160 is connected to the second potential signal line, the output end of the second voltage control module 160 is connected to the first node N1, and the second voltage control module 160 is used to respond to the second control signal Gn+4 and transmit the second potential signal VGL2 on the second potential signal line to the first node N1; wherein the input module 110 and the second voltage control module 160 are turned on in a time-sharing manner.

[0075] When the input module 110 is turned on and the second voltage control module 160 is turned off, the input module 110 transmits the third potential signal VGH1 on the third potential signal line to the first node N1, and the output module 120 is turned on in response to the voltage of the first node N1. When the input module 110 is turned off and the second voltage control module 160 is turned on, the second voltage control module 160 transmits the second potential signal VGL2 to the first node N1, and the output module 120 is turned off in response to the voltage of the first node N1.

[0076] Figure 5 A schematic diagram of another gate driving unit provided in an embodiment of the present invention is provided. Figure 5On the basis of the above embodiments, optionally, the gate driving unit provided in this embodiment further includes a third voltage control module 170, the control end of the third voltage control module 170 is connected to the touch control signal TP-C, the input end of the third voltage control module 170 is connected to the first potential signal line, the output end of the third voltage control module 170 is connected to the output end of the driving control unit 1501, and the third voltage control module 170 is used to transmit the first potential signal VGL1 to the output end of the driving control unit 1501 in the touch stage to maintain the voltage at the output end of the driving control unit 1501 and turn off the stabilization unit 1502.

[0077] Specifically, in the touch stage, the first node N1 is maintained at a conduction potential (e.g., a high potential), and the driving control unit 1501 controls the stabilization unit 1502 to be turned off in response to the potential of the first node N1. However, in the case of leakage at the first node N1, it is easy to control the stabilization unit 1502 to be turned on by the driving control unit 1501. In this embodiment, in the touch stage, the third voltage control module 170 is turned on in response to the touch control signal TP-C, and transmits the first potential signal VGL1 to the output end of the driving module 1501, thereby strengthening the voltage at the control end of the stabilization unit 1502, ensuring that the stabilization unit 1502 is in the off state, avoiding interference with the voltage of the first node N1, and thus maintaining the stability of the voltage of the first node N1.

[0078] Figure 6 A schematic diagram of another gate driving unit provided in an embodiment of the present invention is provided. Figure 6 On the basis of the above embodiments, the input module 110 includes a first transistor Q1, the output module 120 includes a second transistor Q2 and a capacitor C1, the first output control module 130 includes a third transistor Q3, the second output control module 140 includes a fourth transistor Q4, the drive control unit 1501 includes a fifth transistor Q5 and a sixth transistor Q6, the stabilization unit 1502 includes a seventh transistor Q7 and an eighth transistor Q8, the second voltage control module 160 includes a ninth transistor Q9, and the third voltage control module 170 includes a tenth transistor Q10.

[0079] The gate of the first transistor Q1 is connected to the first control signal Gn-4, the first electrode of the first transistor Q1 is connected to the third potential signal line, the second electrode of the first transistor Q1 is connected to the first node N1, the gate of the second transistor Q2 is connected to the first node N1, the first electrode of the second transistor Q2 is connected to the first clock signal CLK1, the second electrode of the second transistor Q2 is connected to the second node N2, and the capacitor C1 is connected between the first node N1 and the second node N2;

[0080] The gate of the third transistor Q3 is connected to the touch control signal TP-C, the first electrode of the third transistor Q3 is connected to the first potential signal line, and the second electrode of the third transistor Q3 is connected to the second node N2; the gate of the fourth transistor Q4 is connected to the second clock signal CLK2, the first electrode of the fourth transistor Q4 is connected to the first potential signal line, and the second electrode of the fourth transistor Q4 is connected to the second node N2;

[0081] The first electrode and the gate of the fifth transistor Q5 are both connected to the fourth potential signal line, the second electrode of the fifth transistor Q5 and the second electrode of the sixth transistor Q6 are connected to the third node N3, the first electrode of the sixth transistor Q6 is connected to the first potential signal line, the gate of the sixth transistor Q6 is connected to the first node N1, the gate of the seventh transistor Q7 and the gate of the eighth transistor Q8 are both connected to the third node N3, the first electrode of the seventh transistor Q7 and the first electrode of the eighth transistor Q8 are both connected to the first potential signal line, the second electrode of the seventh transistor Q7 is connected to the first node N1, and the second electrode of the eighth transistor Q8 is connected to the second node N2;

[0082] The gate of the ninth transistor Q9 is connected to the second control signal Gn+4, the first electrode of the ninth transistor Q9 is connected to the second potential signal line, and the second electrode of the ninth transistor Q9 is connected to the first node N1; the gate of the tenth transistor Q10 is connected to the touch control signal TP-C, the first electrode of the tenth transistor Q10 is connected to the first potential signal line, and the second electrode of the tenth transistor Q10 is connected to the third node N3.

[0083] Among them, the voltage value of the first potential signal VGL1 transmitted on the first potential signal line is less than or equal to the voltage value of the second potential signal VGL2 transmitted on the second potential signal line, the voltage value of the third potential signal VGH1 transmitted on the third potential signal line is greater than the voltage value of the second potential signal VGL2, and the voltage value of the fourth potential signal VGH2 transmitted on the fourth potential signal line is greater than the voltage value of the second potential signal VGL2 and less than the voltage value of the third potential signal VGH1.

[0084] Figure 7 Another driving waveform diagram of a gate driving unit provided in an embodiment of the present invention can be applied to Figure 6 The gate drive unit shown, combined with Figure 6 and Figure 7 Taking the case where all transistors are N-type transistors as an example, the working process of the gate driving unit provided in this embodiment includes:

[0085] During the display phase:

[0086] In the first sub-phase (t1-t2), the first clock signal CLK1 is at a low level, the second clock signal CLK2 is at a high level, and the fourth transistor Q4 is turned on; the first transistor Q1 is turned on in response to the first control signal Gn-4, and the ninth transistor Q9 is turned off in response to the second control signal Gn+4, and the first transistor Q1 transmits the third potential signal VGH1 to the first node N1, the first node N1 is at a high level, the second transistor Q2 is turned on, and the second transistor Q2 transmits the low level of the first clock signal CLK1 to the second node N2, and at the same time, under the pull-down effect of the fourth transistor Q4, the second node N2 maintains a low level output, that is, the low level of the output gate drive signal Gn. Among them, Gn-N1on represents the gate drive signal Gn when the first node N1 is turned on, and Gn-N1off represents the gate drive signal Gn when the first node N1 is turned off.

[0087] In the second sub-stage (t2-t3), the second clock signal CLK2 jumps to a low level, the fourth transistor Q4 is turned off, and the first clock signal CLK1 jumps to a high level. Under the bootstrap effect of the capacitor C1, the voltage of the first node N1 is further pulled up to ensure that the second transistor Q2 is fully turned on. The second transistor Q2 transmits the high level of the first clock signal CLK1 to the second node N2 and outputs the high level of the gate drive signal Gn. In addition, under the action of the first node N1, the sixth transistor Q6 is turned on, pulling down the voltage of the third node N3 to ensure that the seventh transistor Q7 and the eighth transistor Q8 are turned off, thereby ensuring the stability of the voltage of the second node N2.

[0088] Optionally, the pull-down capability of the sixth transistor Q6 is stronger than the pull-up capability of the fifth transistor Q5, so as to better control the potential of the third node N3. For example, the channel width-to-length ratio of the sixth transistor Q6 is greater than the channel width-to-length ratio of the fifth transistor Q5.

[0089] In the third sub-stage, i.e., the time period between the moment t3 and the touch stage, the ninth transistor Q9 is turned on in response to the second control signal Gn+4, and transmits the second potential signal VGL2 to the first node N1, the first node N1 is at a low level, the second transistor Q2 is turned off, and the sixth transistor Q6 is turned off. Under the pull-up action of the fifth transistor Q5, the third node N3 is pulled to a high level, the seventh transistor Q7 and the eighth transistor Q8 are turned on, the seventh transistor Q7 transmits the first potential signal VGL1 to the first node N1 to maintain the low potential of the first node N1, and the eighth transistor Q8 transmits the first potential signal VGL1 to the second node N2 to maintain the low potential of the second node N2, thereby ensuring the stability of the output of the gate drive signal Gn. At the same time, the second clock signal CLK2 will also periodically turn on the fourth transistor Q4 to further stabilize the potential of the second node N2.

[0090] In the touch stage, the third transistor Q3 and the tenth transistor Q10 are turned on in response to the touch control signal TP-C, and the third transistor Q3 transmits the first potential signal VGL1 to the second node N2, and pulls the gate drive signal Gn to the synchronization signal of the touch signal TP. Here, the touch control signal TP-C is a full-screen signal, and the gate drive signals Gn of all rows in the panel are pulled to the synchronization signal of the touch signal TP, thereby eliminating the brightness difference problem caused by the output difference of the gate drive signal Gn at different positions, which is conducive to improving the uniformity of the display brightness, thereby improving the display effect.

[0091] The tenth transistor Q10 transmits the first potential signal VGL1 to the third node N3, and pulls down the voltage of the third node N3 to strengthen the voltage of the gate of the seventh transistor Q7 and the eighth transistor Q8, and avoids the fifth transistor Q5 from being continuously turned on when the first node N1 slowly leaks electricity, causing the voltage of the third node N3 to increase, so that the seventh transistor Q7 and the eighth transistor Q8 are turned on, and the voltage of the first node N1 is pulled down. In this embodiment, by introducing the tenth transistor Q10, the gate voltage of the seventh transistor Q7 and the eighth transistor Q8 can be strengthened, and the seventh transistor Q7 and the eighth transistor Q8 can be prevented from being turned on, thereby ensuring the stability of the voltage of the first node N1. In addition, due to the existence of the tenth transistor Q10, the voltage of the third node N3 can be pulled down, and the time of the fourth potential signal VGH2 stress on the gate of the seventh transistor Q7 and the eighth transistor Q8 can be reduced, which is conducive to increasing the output capacity of the seventh transistor Q7 and the eighth transistor Q8, thereby improving the circuit stability.

[0092] Figure 8 A schematic diagram of another gate driving unit provided in an embodiment of the present invention is provided. Figure 8 On the basis of the above embodiments, optionally, a fourth voltage control module 180 is further included, and the fourth voltage control module 180 is used to control the potential of the first node N1 in the touch stage to keep the output module 120 turned on; the fourth voltage control module 180 includes a first subunit 1801 and a second subunit 1802, the control end and the input end of the first subunit 1801 are both connected to the touch control signal TP-C, the output end of the first subunit 1801 is connected to the input end of the second subunit 1802, and the output end and the control end of the second subunit 1802 are both connected to the first node N1.

[0093] Specifically, the first subunit 1801 includes an eleventh transistor Q11, and the second subunit 1802 includes a twelfth transistor Q12. The first electrode and the gate of the eleventh transistor Q11 are both connected to the touch control signal TP-C, the second electrode of the eleventh transistor Q11 is connected to the first electrode of the twelfth transistor Q12, and the second electrode and the gate of the twelfth transistor Q12 are both connected to the first node N1.

[0094] Combination Figure 7 In the touch stage, the eleventh transistor Q11 is turned on in response to the high level of the touch control signal TP-C, and transmits the high level of the touch control signal TP-C to the first node N1 via the twelfth transistor Q12, so that the voltage of the first node N1 can be stably maintained at a high level, which can increase the high voltage holding capacity of the first node N1 in the touch stage, so as to pull up the gate driving unit again to output the gate driving signal Gn in the subsequent display stage.

[0095] Optionally, in this embodiment, the high level and low level voltages of the touch control signal TP-C are adjustable. Taking the case where all transistors are N-type transistors as an example, in the touch stage, the higher the voltage of the touch control signal TP-C, the stronger the conduction capability of the third transistor Q3 and the tenth transistor Q10, which is beneficial to improving the transmission quality of the first potential signal VGL1, so as to transmit the first potential signal VGL1 to the second node N2 and the third node N3 without attenuation, ensure the stability of the voltage of the second node N2 and the third node N3, ensure that the seventh transistor Q7 can be better turned off, so that the first potential signal VGL1 cannot leak to the first node N1 through the seventh transistor Q7, improve the stability of the voltage of the first node N1, and thus make the gate drive signal Gn more stable.

[0096] Similarly, in the touch stage, the higher the voltage of the touch control signal TP-C, the better the conduction capability of the eleventh transistor Q11, which is conducive to the lossless transmission of the touch control signal TP-C, and the voltage of the first node N1 can be increased to the high voltage of the touch control signal TP-C through the twelfth transistor Q12. That is, in the touch stage, the voltage of the first node N1 follows the high voltage of the touch control signal TP-C. By adjusting the voltage of the touch control signal TP-C to control the voltage of the first node N1, the voltage of the first node N1 is stably maintained at the high level of the touch control signal TP-C throughout the touch stage and will not decrease over time.

[0097] When the touch stage ends, the touch control signal TP-C changes from a high level to a low level, the third transistor Q3 and the tenth transistor Q10 are turned off, and the connection between the first potential signal VGL1 and the second node N2 and the third node N3 is cut off. At the same time, the eleventh transistor Q11 is turned off, and the connection between the touch control signal TP-C and the first node N1 is cut off, which does not affect the transmission of subsequent signals, and ensures the normal operation of the gate driving unit.

[0098] It should be understood that, since the gate of the twelfth transistor Q12 is connected to the first node N1, only when the gate driving unit is outputting normally and the touch control signal TP-C jumps to a high level, can the high voltage of the touch control signal TP-C enter the first node N1 of the corresponding gate driving unit. At the same time, in the touch stage, the gate driving unit at the non-touch pit position has a low voltage at the corresponding first node N1, and the twelfth transistor Q12 is turned off. Therefore, even if the touch control signal TP-C is a high voltage, when the twelfth transistor Q12 is turned off, the high voltage of the touch control signal TP-C cannot enter the first node N1, so as to ensure that the voltage of the first node N1 of the gate driving unit at the non-touch pit position is not affected, which is beneficial to improve the operation stability of the gate driving unit. Among them, the gate driving unit at the non-touch pit position operates normally.

[0099] The embodiment of the present invention further provides a driving method of a gate driving unit. Fig. 9 A flowchart of a driving method of a gate driving unit provided in an embodiment of the present invention, the method can be used to drive the gate driving unit provided in any of the above embodiments, refer to Fig. 9 , the method comprising:

[0100] S110 , in the display stage, the control input module charges the first node in response to the first control signal of its own control terminal, and the control output module outputs a gate driving signal in response to the voltage of the first node.

[0101] S120 , in the touch control stage, controlling the first output control module to respond to the touch control signal of its own control end, and transmitting the first potential signal on the first potential signal line to the control end of the output module to stabilize the potential of the output end of the output module.

[0102] The technical solution provided by the embodiment of the present invention is to set a first output control module at the output end of the output module. In the touch stage, the first output control module is controlled to respond to the touch control signal to transmit the first potential signal to the control end of the output module to control the potential of the gate drive signal, thereby ensuring that the gate drive signals corresponding to all pixel rows in the surface are the same, and are all first potential signals, thereby eliminating the brightness difference problem caused by the output difference of the gate drive signal at different positions, which is beneficial to improving the uniformity of the display brightness and further improving the display effect.

[0103] Combination Figure 8In this embodiment, the input end of the input module 110 is connected to the third potential signal line, the input end of the output module 120 is connected to the first clock signal CLK1, the gate driving unit also includes a second output control module 140, a first voltage control module 150, a second voltage control module 160, a third voltage control module 170 and a fourth voltage control module 180, the input end of the second output control module 140 is connected to the first potential signal line, the output end of the second output control module 140 and the output end of the output module 120 are connected to the second node N2, the control end of the second output control module 140 is connected to the second clock signal CLK2, the first voltage control module 150 includes a driving control unit 1501 and a stabilization unit 1502, the control end of the driving control unit 1501 is connected to the first node N1, the output end of the driving control unit 1501 is connected to the control end of the stabilization unit 1502, the input end of the stabilization unit 1502 is connected to the first potential signal line, and the stabilization unit 1502 is connected to the control end of the stabilization unit 1502. The output end of unit 1502 is respectively connected to the first node N1 and the second node N2, the control end of the second voltage control module 160 is connected to the second control signal Gn-4, the input end of the second voltage control module 160 is connected to the second potential signal line, the output end of the second voltage control module 160 is connected to the first node N1, the control end of the third voltage control module 170 is connected to the touch control signal TP-C, the input end of the third voltage control module 170 is connected to the first potential signal line, the output end of the third voltage control module 170 is connected to the output end of the driving control unit 1501 (i.e., the third node N3), the fourth voltage control module 180 includes a first sub-unit 1801 and a second sub-unit 1802, the control end and the input end of the first sub-unit 1801 are both connected to the touch control signal TP-C, the output end of the first sub-unit 1801 is connected to the input end of the second sub-unit 1802, and the output end and the control end of the second sub-unit 1802 are both connected to the first node N1.

[0104] Fig.10 A flowchart of another gate driving method provided by an embodiment of the present invention is provided. Fig.10 In the display stage, the driving method of the gate driving unit provided by the embodiment of the present invention specifically includes:

[0105] S1101. In a first sub-phase, the control input module transmits the third potential signal on the third potential signal line to the first node, pre-charges the first node, and controls the output module to output a first level pulse signal of the first clock signal.

[0106] S1102. In the second sub-phase, the first clock signal changes from a first-level pulse signal to a second-level pulse signal, and the control output module adjusts the voltage of the first node according to the change of the first clock signal, and outputs the second-level pulse signal of the first clock signal.

[0107] S1103. In the third sub-stage, the second voltage control module is controlled to transmit the second potential signal on the second potential signal line to the first node, the drive control unit is controlled to drive the stabilization unit according to the voltage of the first node to transmit the first potential signal on the first potential signal line to the first node, and the second output control module is controlled to transmit the first potential signal to the second node.

[0108] In the touch control stage, the driving method of the gate driving unit provided by the embodiment of the present invention specifically includes:

[0109] S1201. In the touch stage, control the first output control module to transmit the first potential signal to the second node, control the third voltage control module to transmit the first potential signal to the output end of the driving control unit, and control the fourth voltage control module to transmit the touch control signal to the first node.

[0110] The first level pulse signal of the first clock signal CLK1 may be a low level signal, and the second level pulse signal may be a high level signal. Fig.10 The specific working process of the driving method shown can refer to the above embodiment. Figures 6 to 8 The related descriptions are the same as those of the present invention and have the same beneficial effects, which will not be repeated here.

[0111] Fig.11 A driving waveform diagram of another gate driving unit provided by an embodiment of the present invention is shown in FIG. Fig.11 , in a display cycle, including a display stage, a touch stage and a blank stage, the blank stage is located between two adjacent display cycles; in the touch stage and the blank stage, the potential of the touch control signal TP-C is the same, and is different from the potential of the touch control signal TP-C in the display stage. That is, in the non-display stage (touch stage and blank stage), the touch control signal TP-C is pulled high, so that the gate drive signal Gn in the non-display stage will be pulled down to the first potential signal VGL1, that is, the gate drive signal Gn is cleared once, which is beneficial to reduce the noise of the circuit and improve the stability of the circuit.

[0112] in, Fig.11 The drive waveforms shown also apply to Figure 6 and Figure 8 The gate driving unit shown has the same working process and beneficial effects.

[0113] Optionally, an embodiment of the present invention further provides a display panel, Fig.12 A schematic diagram of a display panel according to an embodiment of the present invention is provided. Fig.12The display panel 200 includes a gate driving circuit 300, which includes a gate driving unit provided by any embodiment of the present invention, and a plurality of gate driving units are cascaded to output gate driving signals step by step. Each level of the gate driving unit is connected to a gate signal line GL to transmit the gate driving signal to the pixels in the panel via the gate signal line GL.

[0114] Combination Figure 8 In this embodiment, the output end of the n-th level gate driving unit (i.e., the output end of the output module 120) is connected to the control end of the input module 110 of the n-4-th level gate driving unit, and is also connected to the control end of the second voltage control module 160 of the n+4-th level gate driving unit. Among them, the n-th level gate driving unit is the gate driving unit after the first 4 levels. The control end of the input module 110 of the first 4 levels of gate driving units can be connected to the same control signal, and the control end of the second voltage control module 160 of the first 4 levels of gate driving units can also be connected to the same control signal.

[0115] Fig.13 A schematic diagram of another display panel provided by an embodiment of the present invention, referring to Fig.13 The gate driving unit 301 includes a first clock signal terminal SCK1 and a second clock signal terminal SCK2. The first clock signal terminal SCK1 is connected to the input terminal of the output module 120, and the second clock signal terminal SCK2 is connected to the control terminal of the second output control module 140.

[0116] The display panel also includes a first clock signal line CL1, a second clock signal line CL2, a third clock signal line CL3 and a fourth clock signal line CL4. The first clock signal line CL1 is used to transmit a clock signal S1, the second clock signal line CL2 is used to transmit a clock signal S2, the third clock signal line CL3 is used to transmit a clock signal S3, and the fourth clock signal line CL4 is used to transmit a clock signal S4. Fig.14 A waveform diagram of a clock signal provided by an embodiment of the present invention is shown in FIG. Fig.14 As shown, the clock signals S1-S4 may lag by a quarter of a cycle in sequence.

[0117] The first clock signal terminal SCK1 of the first-stage gate driving unit 301 is connected to the second clock signal line CL2, the second clock signal terminal SCK2 is connected to the fourth clock signal line CL4, the clock signal S2 is connected to the input terminal of the output module 120 as the first clock signal CLK1, and the clock signal S4 is connected to the control terminal of the second output control module 140 as the second clock signal CLK2.

[0118] The first clock signal terminal SCK1 of the second-stage gate driving unit 301 is connected to the third clock signal line CL3, the second clock signal terminal SCK2 is connected to the first clock signal line CL1, the clock signal S3 is connected to the input terminal of the output module 120 as the first clock signal CLK1, and the clock signal S1 is connected to the control terminal of the second output control module 140 as the second clock signal CLK2.

[0119] The first clock signal terminal SCK1 of the third-stage gate driving unit 301 is connected to the fourth clock signal line CL4, the second clock signal terminal SCK2 is connected to the second clock signal line CL2, the clock signal S4 is connected to the input terminal of the output module 120 as the first clock signal CLK1, and the clock signal S2 is connected to the control terminal of the second output control module 140 as the second clock signal CLK2.

[0120] The first clock signal terminal SCK1 of the fourth-stage gate driving unit 301 is connected to the first clock signal line CL1, the second clock signal terminal SCK2 is connected to the third clock signal line CL3, the clock signal S1 is connected to the input terminal of the output module 120 as the first clock signal CLK1, and the clock signal S3 is connected to the control terminal of the second output control module 140 as the second clock signal CLK2.

[0121] The clock signal line connected to the first clock signal terminal SCK1 and the second clock signal terminal SCK2 of the fifth-stage gate driving unit 301 is the same as the clock signal line connected to the first clock signal terminal SCK1 and the second clock signal terminal SCK2 of the first-stage gate driving unit 301. That is, each four-stage gate driving unit is a group of repeated cycles to achieve the output of the gate driving signal step by step.

[0122] In this embodiment, the connection method of the multi-stage gate driving unit 301 is only given as an example. For the specific connection architecture, reference may be made to the relevant description in the related art, which will not be repeated here.

[0123] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0124] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gate driving unit, characterized in that: include: an input module, wherein an output end of the input module is connected to a first node, and the input module is used to precharge the first node in response to a first control signal; an output module, wherein a control end of the output module is connected to the first node, and the output module is used to output a gate drive signal in response to a voltage of the first node; A first output control module, wherein the control end of the first output control module is connected to a touch control signal, the first output control module is connected between a first potential signal line and the output end of the output module, the first output control module is used to respond to the touch control signal in a touch stage, transmit the first potential signal on the first potential signal line to the output end of the output module to stabilize the potential of the output end of the output module, and release the control of the potential of the output end of the output module in response to the touch control signal in a display stage.

2. The gate driving unit according to claim 1, characterized in that: The input end of the output module is connected to a first clock signal. In the touch stage, the first clock signal is a synchronization signal of the touch signal. In the display stage, the first clock signal is a clock pulse signal. In the touch control stage, the first potential signal is a synchronization signal of the touch control signal, and in the display stage, the first potential signal is a fixed voltage signal.

3. The gate driving unit according to claim 1, characterized in that: Also includes a second output control module and a first voltage control module; The input end of the second output control module is connected to the first potential signal line, the output end of the second output control module and the output end of the output module are connected to a second node, the control end of the second output control module is connected to a second clock signal, and the second output control module is used to control the potential of the second node in response to the second clock signal; The first voltage control module includes a driving control unit and a stabilization unit, the control end of the driving control unit is connected to the first node, the output end of the driving control unit is connected to the control end of the stabilization unit, the input end of the stabilization unit is connected to the first potential signal line, the output end of the stabilization unit is connected to the first node and the second node respectively, and the stabilization unit is used to control the potential of the first node and the potential of the second node in response to the voltage of the output end of the driving control unit when the output module is turned off; The gate driving unit also includes a second voltage control module, a control end of the second voltage control module is connected to a second control signal, an input end of the second voltage control module is connected to a second potential signal line, an output end of the second voltage control module is connected to the first node, and the second voltage control module is used to transmit a second potential signal on the second potential signal line to the first node in response to the second control signal; wherein the input module and the second voltage control module are turned on in a time-sharing manner.

4. The gate driving unit according to claim 3, characterized in that: The gate driving unit also includes a third voltage control module, the control end of the third voltage control module is connected to the touch control signal, the input end of the third voltage control module is connected to the first potential signal line, the output end of the third voltage control module is connected to the output end of the driving control unit, and the third voltage control module is used to transmit the first potential signal to the output end of the driving control unit during the touch stage to maintain the voltage of the output end of the driving control unit and turn off the stabilization unit.

5. The gate driving unit according to claim 4, characterized in that: The input module includes a first transistor, the output module includes a second transistor and a capacitor, the first output control module includes a third transistor, the second output control module includes a fourth transistor, the drive control unit includes a fifth transistor and a sixth transistor, the stabilization unit includes a seventh transistor and an eighth transistor, the second voltage control module includes a ninth transistor, and the third voltage control module includes a tenth transistor; The gate of the first transistor is connected to the first control signal, the first electrode of the first transistor is connected to the third potential signal line, the second electrode of the first transistor is connected to the first node, the gate of the second transistor is connected to the first node, the first electrode of the second transistor is connected to the first clock signal, the second electrode of the second transistor is connected to the second node, and the capacitor is connected between the first node and the second node; The gate of the third transistor is connected to the touch control signal, the first electrode of the third transistor is connected to the first potential signal line, and the second electrode of the third transistor is connected to the second node; The gate of the fourth transistor is connected to the second clock signal, the first electrode of the fourth transistor is connected to the first potential signal line, and the second electrode of the fourth transistor is connected to the second node; The first electrode and the gate of the fifth transistor are both connected to the fourth potential signal line, the second electrode of the fifth transistor and the second electrode of the sixth transistor are connected to a third node, the first electrode of the sixth transistor is connected to the first potential signal line, the gate of the sixth transistor is connected to the first node, the gate of the seventh transistor and the gate of the eighth transistor are both connected to the third node, the first electrode of the seventh transistor and the first electrode of the eighth transistor are both connected to the first potential signal line, the second electrode of the seventh transistor is connected to the first node, and the second electrode of the eighth transistor is connected to the second node; The gate of the ninth transistor is connected to the second control signal, the first electrode of the ninth transistor is connected to the second potential signal line, and the second electrode of the ninth transistor is connected to the first node; The gate of the tenth transistor is connected to the touch control signal, the first electrode of the tenth transistor is connected to the first potential signal line, and the second electrode of the tenth transistor is connected to the third node; Among them, the voltage value of the first potential signal transmitted on the first potential signal line is less than or equal to the voltage value of the second potential signal transmitted on the second potential signal line, the voltage value of the third potential signal transmitted on the third potential signal line is greater than the voltage value of the second potential signal, and the voltage value of the fourth potential signal transmitted on the fourth potential signal line is greater than the voltage value of the second potential signal and less than the voltage value of the third potential signal.

6. The gate driving unit according to claim 1, characterized in that: It also includes a fourth voltage control module, the fourth voltage control module is used to control the potential of the first node in the touch control stage to keep the output module turned on; The fourth voltage control module includes a first subunit and a second subunit, the control end and the input end of the first subunit are both connected to the touch control signal, the output end of the first subunit is connected to the input end of the second subunit, and the output end and the control end of the second subunit are both connected to the first node; The first subunit includes an eleventh transistor, the second subunit includes a twelfth transistor, the first electrode and the gate of the eleventh transistor are both connected to the touch control signal, the second electrode of the eleventh transistor is connected to the first electrode of the twelfth transistor, and the second electrode and the gate of the twelfth transistor are both connected to the first node.

7. A driving method for a gate driving unit, characterized in that: include: In the display stage, the control input module charges the first node in response to the first control signal of its own control terminal, and the control output module outputs a gate drive signal in response to the voltage of the first node; In the touch control stage, the first output control module is controlled to respond to the touch control signal of its own control end, and transmit the first potential signal on the first potential signal line to the control end of the output module to stabilize the potential of the output end of the output module.

8. The driving method of the gate driving unit according to claim 7, characterized in that: The input end of the input module is connected to the third potential signal line, the input end of the output module is connected to the first clock signal, the gate driving unit also includes a second output control module, a first voltage control module, a second voltage control module, a third voltage control module and a fourth voltage control module, the input end of the second output control module is connected to the first potential signal line, the output end of the second output control module and the output end of the output module are connected to a second node, the control end of the second output control module is connected to the second clock signal, the first voltage control module includes a driving control unit and a stabilization unit, the control end of the driving control unit is connected to the first node, the output end of the driving control unit is connected to the control end of the stabilization unit, the input end of the stabilization unit is connected to the first potential signal line, and the stabilization unit The output end of the element is connected to the first node and the second node respectively, the control end of the second voltage control module is connected to the second control signal, the input end of the second voltage control module is connected to the second potential signal line, the output end of the second voltage control module is connected to the first node, the control end of the third voltage control module is connected to the touch control signal, the input end of the third voltage control module is connected to the first potential signal line, the output end of the third voltage control module is connected to the output end of the driving control unit, the fourth voltage control module includes a first subunit and a second subunit, the control end and the input end of the first subunit are both connected to the touch control signal, the output end of the first subunit is connected to the input end of the second subunit, and the output end and the control end of the second subunit are both connected to the first node; In the display stage, the driving method of the gate driving unit includes: In the first sub-stage, the input module is controlled to transmit the third potential signal on the third potential signal line to the first node to precharge the first node, and the output module is controlled to output a first level pulse signal of the first clock signal; In the second sub-stage, the first clock signal jumps from a first-level pulse signal to a second-level pulse signal, the output module is controlled to adjust the voltage of the first node according to the jump of the first clock signal, and output the second-level pulse signal of the first clock signal; In the third sub-stage, the second voltage control module is controlled to transmit the second potential signal on the second potential signal line to the first node, the driving control unit is controlled to drive the stabilization unit to transmit the first potential signal on the first potential signal line to the first node according to the voltage of the first node, and the second output control module is controlled to transmit the first potential signal to the second node; In the touch control stage, the driving method of the gate driving unit includes: In the touch stage, the first output control module is controlled to transmit the first potential signal to the second node, the third voltage control module is controlled to transmit the first potential signal to the output end of the driving control unit, and the fourth voltage control module is controlled to transmit the touch control signal to the first node.

9. The driving method of the gate driving unit according to claim 7, characterized in that: In a display cycle, it includes the display stage, the touch stage and the blank stage, and the blank stage is located between two adjacent display cycles; In the touch stage and the blank stage, the potential of the touch control signal is the same and different from the potential of the touch control signal in the display stage.

10. A display panel, characterized in that: It comprises a gate driving circuit, wherein the gate driving circuit comprises a plurality of gate driving units according to any one of claims 1 to 6, and the plurality of gate driving units are connected in cascade.

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