Voltage supply module, voltage supply method and touch display device

Abstract

The invention provides a voltage providing module, a voltage providing method and a touch display device. The voltage supply module is applied to the touch display device, the touch display device comprises a driving module and a plurality of pixels, the driving module comprises a multi-stage driving circuit, and each pixel comprises a switching transistor; the driving circuit provides a driving signal for the grid electrode of the switching transistor; the voltage supply module comprises a voltage supply circuit; the voltage supply circuit is used for controlling the driving signal by controlling a voltage signal supplied to the driving circuit in a touch control stage, so that the switching transistor is in a turn-off state, and the current value of the leakage current of the switching transistor is controlled to be greater than or equal to 40pA and less than or equal to 120pA. According to the invention, no splash screen can be ensured, and large noise can be avoided.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a voltage supply module, a voltage supply method and a touch display device. Background Art

[0002] In the related technology, as major mobile phone brands continue to innovate, the LPWG (Low Power Wake-up Gesture, black screen gesture wake-up) function is becoming more and more popular. In the touch stage, the leakage current of the transistor in the driving circuit of the touch display product is too small, so that the charge cannot be effectively released, and the LPWG dormant screen flashing problem is prone to occur; and when the leakage current is too large, touch noise is prone to occur during the production and testing process. Summary of the invention

[0003] The main purpose of the present invention is to provide a voltage supply module, a voltage supply method and a touch display device to solve the problem that during the touch stage, the leakage current of the transistor in the driving circuit of the touch display product is too small, so that the charge cannot be effectively released, and the LPWG sleep screen flashing problem is easy to occur; and when the leakage current is too large, the touch noise problem in the production and testing process is easy to occur.

[0004] In one aspect, an embodiment of the present invention provides a voltage supply module, which is applied to a touch display device, wherein the touch display device includes a driving module and a plurality of pixels, wherein the driving module includes a multi-stage driving circuit, and the pixel includes a switching transistor; the driving circuit provides a driving signal for a gate of the switching transistor; and the voltage supply module includes a voltage supply circuit;

[0005] The voltage supply circuit is used to control the driving signal by controlling the voltage signal provided to the driving circuit during the touch stage, so that the switching transistor is in an off state and the leakage current of the switching transistor is controlled to be greater than or equal to 40pA and less than or equal to 120pA.

[0006] Optionally, the driving circuit includes an output circuit, the output circuit is electrically connected to the first node, the output clock signal terminal and the driving signal output terminal respectively, and the output circuit is used to provide the output clock signal provided by the output clock signal terminal to the driving signal output terminal under the control of the potential of the first node;

[0007] The voltage providing circuit is used to provide a positive modulation voltage signal or a negative modulation voltage signal to the output clock signal terminal during the touch control stage;

[0008] The forward modulation voltage signal is a superposition signal of a DC positive voltage signal and an AC modulation voltage signal, the voltage value of the forward modulation voltage signal is greater than 0, and the AC modulation voltage signal is a square wave voltage signal;

[0009] The negative modulation voltage signal is a superposition signal of a DC negative voltage signal and the AC modulation voltage signal, and a voltage value of the negative modulation voltage signal is less than 0.

[0010] Optionally, the driving circuit further includes a frame reset circuit; the frame reset circuit is electrically connected to the frame reset terminal, the driving signal output terminal and the first voltage terminal respectively, and is used to write the first voltage signal provided by the first voltage terminal into the driving signal output terminal under the control of the frame reset signal provided by the frame reset terminal;

[0011] The voltage providing circuit is used for providing the negative modulation voltage signal to the frame reset terminal and the first voltage terminal during the touch control stage.

[0012] Optionally, the driving circuit further includes a first node control circuit; the first node control circuit is electrically connected to the first node, the input terminal, the first control voltage terminal, the reset terminal, and the second control voltage terminal, respectively, and is used to control the potential of the first node according to the first control voltage provided by the first control voltage terminal and the second control voltage provided by the second control voltage terminal under the control of the input signal provided by the input terminal and the reset signal provided by the reset terminal;

[0013] The voltage providing circuit is used for providing the negative modulation voltage signal to the first control voltage terminal and the second control voltage terminal during the touch control stage.

[0014] Optionally, the driving circuit further includes a second node control circuit; the second node control circuit is electrically connected to the second voltage terminal, the first node, the first voltage terminal and the second node respectively, and is used to control the potential of the second node according to a first voltage signal provided by the first voltage terminal and a second voltage signal provided by the second voltage terminal under the control of the potential of the first node;

[0015] The voltage providing circuit is used for providing the negative modulation voltage signal to the first voltage terminal and the second voltage terminal during the touch control stage.

[0016] Optionally, the driving circuit further includes an output control circuit; the output control circuit is electrically connected to the control clock signal terminal, the driving signal output terminal and the first voltage terminal respectively, and is used to control the connection or disconnection between the driving signal output terminal and the first voltage terminal under the control of the control clock signal provided by the control clock signal terminal;

[0017] The voltage providing circuit is used for providing the negative modulation voltage signal to the control clock signal terminal and the first voltage terminal during the touch control stage.

[0018] Optionally, the input terminal of the first-stage driving circuit included in the driving module is electrically connected to the starting voltage terminal;

[0019] The voltage providing circuit is used for providing a negative modulation voltage signal to the starting voltage terminal during the touch control stage.

[0020] In a second aspect, an embodiment of the present invention provides a voltage providing method, which is applied to the above-mentioned voltage providing module, wherein the voltage providing module is applied to a touch display device, wherein the touch display device includes a driving module and a plurality of pixels, wherein the driving module includes a multi-stage driving circuit, and the pixel includes a switching transistor; the driving circuit provides a driving signal for a gate of the switching transistor; and the voltage providing method includes:

[0021] In the touch control stage, the voltage supply circuit controls the driving signal by controlling the voltage signal provided to the driving circuit, so that the switching transistor is in the off state, and controls the leakage current of the switching transistor to be greater than or equal to 40pA and less than or equal to 120pA.

[0022] Optionally, the driving circuit includes an output circuit, the output circuit is electrically connected to the first node, the output clock signal terminal and the driving signal output terminal respectively, and the output circuit is used to provide the output clock signal provided by the output clock signal terminal to the driving signal output terminal under the control of the potential of the first node; the voltage providing method includes:

[0023] In the touch control stage, the voltage providing circuit provides a positive modulation voltage signal or a negative modulation voltage signal to the output clock signal terminal;

[0024] The forward modulation voltage signal is a superposition signal of a DC positive voltage signal and an AC modulation voltage signal, the voltage value of the forward modulation voltage signal is greater than 0, and the AC modulation voltage signal is a square wave voltage signal;

[0025] The negative modulation voltage signal is a superposition signal of a DC negative voltage signal and the AC modulation voltage signal, and a voltage value of the negative modulation voltage signal is less than 0.

[0026] Optionally, the driving circuit further includes a frame reset circuit; the frame reset circuit is electrically connected to the frame reset terminal, the driving signal output terminal and the first voltage terminal respectively, and is used to write the first voltage signal provided by the first voltage terminal into the driving signal output terminal under the control of the frame reset signal provided by the frame reset terminal; the voltage providing method includes:

[0027] In the touch control stage, the voltage providing circuit is used to provide the negative modulation voltage signal to the frame reset terminal and the first voltage terminal.

[0028] In a third aspect, an embodiment of the present invention provides a touch display device, including a driving module and a plurality of pixels, wherein the pixels include switching transistors; the driving circuit provides a driving signal for a gate of the switching transistor; and the touch display device also includes the above-mentioned voltage supply module.

[0029] The touch display device described in at least one embodiment of the present invention includes a timing controller;

[0030] The voltage providing module is included in the timing controller.

[0031] Optionally, the pixel further includes a pixel electrode; the gate of the switch transistor is electrically connected to the drive signal output terminal of the drive circuit, the first electrode of the switch transistor is electrically connected to the corresponding column data line, and the second electrode of the switch transistor is electrically connected to the pixel electrode;

[0032] The driving circuit includes an output circuit, an energy storage circuit and a frame reset circuit;

[0033] The output circuit is electrically connected to the first node, the output clock signal terminal and the drive signal output terminal respectively, and is used to provide the output clock signal provided by the output clock signal terminal to the drive signal output terminal under the control of the potential of the first node;

[0034] The first end of the energy storage circuit is electrically connected to the first node, and the second end of the energy storage circuit is electrically connected to the drive signal output end;

[0035] The frame reset circuit is electrically connected to the frame reset terminal, the drive signal output terminal and the first voltage terminal respectively, and is used to write the first voltage signal provided by the first voltage terminal into the drive signal output terminal under the control of the frame reset signal provided by the frame reset terminal.

[0036] The voltage supply module, voltage supply method and touch display device described in the embodiments of the present invention can ensure no screen flicker and avoid excessive noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a structural diagram of a voltage providing module according to at least one embodiment of the present invention;

[0038] Figure 2 is a structural diagram of a voltage providing module according to at least one embodiment of the present invention;

[0039] Figure 3 is a structural diagram of a voltage providing module according to at least one embodiment of the present invention;

[0040] Figure 4 is a structural diagram of a voltage providing module according to at least one embodiment of the present invention;

[0041] Figure 5 is a structural diagram of a voltage providing module according to at least one embodiment of the present invention;

[0042] Figure 6 is a structural diagram of a voltage providing module according to at least one embodiment of the present invention;

[0043] Figure 7 is a structural diagram of a voltage providing module according to at least one embodiment of the present invention;

[0044] Figure 8 is a structural diagram of a voltage providing module according to at least one embodiment of the present invention;

[0045] Fig. 9 is a circuit diagram of at least one embodiment of a drive circuit;

[0046] Fig.10 yes Fig. 9 An operation timing diagram of at least one embodiment of the driving circuit shown;

[0047] Fig.11A yes Fig. 9 An operation timing diagram of at least one embodiment of the driving circuit shown;

[0048] Fig. 11B Schematic diagram of the relationship between the gate voltage Vg of the switching transistor and the drain current Id of the switching transistor;

[0049] Fig.12 is a circuit diagram of at least one embodiment of a drive circuit;

[0050] Fig.13 yes Fig.12 An operation timing diagram of at least one embodiment of the driving circuit shown;

[0051] Fig.14 is a circuit diagram of at least one embodiment of a drive circuit;

[0052] Fig.15 yes Fig.14 An operation timing diagram of at least one embodiment of the driving circuit shown;

[0053] Fig.16 is a circuit diagram of at least one embodiment of a pixel. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0055] The transistors used in all embodiments of the present invention may be thin film transistors or field effect transistors or other devices with the same characteristics. In the embodiments of the present invention, to distinguish the two electrodes of the transistor except the gate, one electrode is called the first electrode and the other electrode is called the second electrode.

[0056] In actual operation, when the transistor is a thin film transistor or a field effect transistor, the first electrode may be a drain electrode, and the second electrode may be a source electrode; or, the first electrode may be a source electrode, and the second electrode may be a drain electrode.

[0057] The voltage supply module described in the embodiment of the present invention is applied to a touch display device, wherein the touch display device comprises a driving module and a plurality of pixels, wherein the driving module comprises a multi-stage driving circuit, and the pixels comprise a switching transistor; the driving circuit provides a driving signal for a gate of the switching transistor; and the voltage supply module comprises a voltage supply circuit;

[0058] The voltage supply circuit is used to control the driving signal by controlling the voltage signal provided to the driving circuit during the touch stage, so that the switching transistor is in an off state and the leakage current of the switching transistor is controlled to be greater than or equal to 40pA and less than or equal to 120pA.

[0059] When the voltage supply module described in the embodiment of the present invention is working, in the touch stage, the voltage supply circuit controls the voltage signal provided to the driving circuit to control the driving signal provided to the gate of the switching transistor, so that the switching transistor is turned off, and the current value of the leakage current of the switching transistor is greater than or equal to 40pA and less than or equal to 120pA, which can ensure no screen flickering and avoid excessive noise.

[0060] Furthermore, the current value of the leakage current may be greater than or equal to 50 pA and less than or equal to 110 pA.

[0061] For example, the current value of the leakage current may be 40pA, 45pA, 50pA, 55pA, 60pA, 65pA, 70pA, 75pA, 80pA, 85pA, 90pA, 95pA, 96.7pA, 100pA, 105pA, 106pA, 110pA, 115pA or 120pA.

[0062] In the specific implementation, according to the actual verification conclusion, the safe leakage current range in which LPWG (Low Power Wake-up Gesture) screen flash does not occur is above 40pA, and the leakage current of the switching transistor should not be too large to avoid excessive touch noise.

[0063] The voltage supply module described in the embodiment of the present invention is applied to a touch display device, wherein the touch display device comprises a driving module and a plurality of pixels, wherein the driving module comprises a multi-stage driving circuit, and the pixels comprise a switching transistor; the driving circuit provides a driving signal to a gate of the switching transistor; Figure 1 As shown, the voltage providing module includes a voltage providing circuit 11;

[0064] The voltage providing circuit 11 is electrically connected to the driving circuit 10, and is used to control the driving signal by controlling the voltage signal provided to the driving circuit 10 during the touch stage, so that the switching transistor is in an off state, and the leakage current of the switching transistor is controlled to be greater than or equal to 40pA and less than or equal to 120pA.

[0065] In at least one embodiment of the present invention, the driving circuit includes an output circuit, the output circuit is electrically connected to the first node, the output clock signal terminal and the driving signal output terminal respectively, and the output circuit is used to provide the output clock signal provided by the output clock signal terminal to the driving signal output terminal under the control of the potential of the first node;

[0066] The voltage providing circuit is used to provide a positive modulation voltage signal or a negative modulation voltage signal to the output clock signal terminal during the touch control stage;

[0067] The forward modulation voltage signal is a superposition signal of a DC positive voltage signal and an AC modulation voltage signal, the voltage value of the forward modulation voltage signal is greater than 0, and the AC modulation voltage signal is a square wave voltage signal;

[0068] The negative modulation voltage signal is a superposition signal of a DC negative voltage signal and the AC modulation voltage signal, and a voltage value of the negative modulation voltage signal is less than 0.

[0069] Optionally, the voltage value of the DC positive voltage signal may be 6V, and the voltage value of the DC negative voltage signal may be -6V;

[0070] The AC modulated voltage signal may be a clock signal, and the absolute value of the AC modulated voltage signal may be greater than or equal to 3V and less than or equal to 4V.

[0071] In a specific implementation, in the touch control stage, an AC modulated voltage signal is provided to the touch control electrodes included in the touch control display device to perform touch control detection.

[0072] like Figure 2 As shown, the driving circuit includes an output circuit 21;

[0073] The output circuit 21 is electrically connected to the first node PU, the output clock signal terminal CLK and the drive signal output terminal OT respectively, and is used to provide the output clock signal provided by the output clock signal terminal CLK to the drive signal output terminal OT under the control of the potential of the first node PU;

[0074] The voltage providing circuit 11 is electrically connected to the output clock signal terminal CLK, and is used to provide a positive modulation voltage signal or a negative modulation voltage signal to the output clock signal terminal CLK during the touch control stage.

[0075] In at least one embodiment of the present invention, the driving circuit further includes a frame reset circuit; the frame reset circuit is electrically connected to the frame reset terminal, the driving signal output terminal and the first voltage terminal respectively, and is used to write the first voltage signal provided by the first voltage terminal to the driving signal output terminal under the control of the frame reset signal provided by the frame reset terminal;

[0076] The voltage providing circuit is used for providing the negative modulation voltage signal to the frame reset terminal and the first voltage terminal during the touch control stage.

[0077] like Figure 3 As shown, in Figure 2 Based on at least one embodiment shown, the driving circuit further includes a frame reset circuit 31;

[0078] The frame reset circuit 31 is electrically connected to the frame reset terminal STV0, the drive signal output terminal OT and the first voltage terminal V1 respectively, and is used to write the first voltage signal provided by the first voltage terminal V1 into the drive signal output terminal OT under the control of the frame reset signal provided by the frame reset terminal STV0;

[0079] The voltage providing circuit 11 is electrically connected to the frame reset terminal STV0 and the first voltage terminal V1 respectively, and is used to provide the negative modulation voltage signal to the frame reset terminal STV0 and the first voltage terminal V1 during the touch control stage.

[0080] In at least one embodiment of the present invention, the driving circuit further includes a first node control circuit; the first node control circuit is electrically connected to the first node, the input terminal, the first control voltage terminal, the reset terminal, and the second control voltage terminal, respectively, and is used to control the potential of the first node according to the first control voltage provided by the first control voltage terminal and the second control voltage provided by the second control voltage terminal under the control of the input signal provided by the input terminal and the reset signal provided by the reset terminal;

[0081] The voltage providing circuit is used for providing the negative modulation voltage signal to the first control voltage terminal and the second control voltage terminal during the touch control stage.

[0082] Optionally, the first voltage terminal may be a low voltage terminal.

[0083] like Figure 4 As shown, in Figure 3 Based on at least one embodiment shown, the driving circuit further includes a first node control circuit 41;

[0084] The first node control circuit 41 is electrically connected to the first node PU, the input terminal I1, the first control voltage terminal VDS, the reset terminal RST, and the second control voltage terminal VSD, respectively, and is used to control the potential of the first node PU according to the first control voltage provided by the first control voltage terminal VDS and the second control voltage provided by the second control voltage terminal VSD under the control of the input signal provided by the input terminal I1 and the reset signal provided by the reset terminal RST;

[0085] The voltage supply circuit 11 is electrically connected to the first control voltage terminal VDS and the second control voltage terminal VSD respectively, and is used to provide the negative modulation voltage signal to the first control voltage terminal VDS and the second control voltage terminal VSD during the touch control stage.

[0086] exist Figure 4 In at least one embodiment shown, the first node control circuit 41 can control the connection or disconnection between the first node PU and the first control voltage terminal VDS under the control of the input signal, and control the connection or disconnection between the first node PU and the second control voltage terminal VSD under the control of the reset signal.

[0087] In at least one embodiment of the present invention, the driving circuit further includes a second node control circuit; the second node control circuit is electrically connected to the second voltage terminal, the first node, the first voltage terminal and the second node respectively, and is used to control the potential of the second node according to a first voltage signal provided by the first voltage terminal and a second voltage signal provided by the second voltage terminal under the control of the potential of the first node;

[0088] The voltage providing circuit is used for providing the negative modulation voltage signal to the first voltage terminal and the second voltage terminal during the touch control stage.

[0089] like Figure 5 As shown, in Figure 4 Based on at least one embodiment shown, the driving circuit further includes a second node control circuit 51;

[0090] The second node control circuit 51 is electrically connected to the second voltage terminal V2, the first node PU, the first voltage terminal V1, and the second node PD, respectively, and is used to control the potential of the second node PD according to the first voltage signal provided by the first voltage terminal V1 and the second voltage signal provided by the second voltage terminal V2 under the control of the potential of the first node PU;

[0091] The voltage providing circuit 11 is also electrically connected to the second voltage terminal V2, and is used to provide the negative modulation voltage signal to the first voltage terminal V1 and the second voltage terminal V2 during the touch control stage.

[0092] Optionally, the second voltage terminal may be a high voltage terminal.

[0093] In at least one embodiment of the present invention, the input terminal of the first-stage driving circuit included in the driving module is electrically connected to the starting voltage terminal;

[0094] The voltage providing circuit is used for providing a negative modulation voltage signal to the starting voltage terminal during the touch control stage.

[0095] like Figure 6 As shown, in Figure 5 On the basis of at least one embodiment shown, the voltage providing circuit 11 is electrically connected to the starting voltage terminal STV, and is used to provide a negative modulation voltage signal to the starting voltage terminal STV during the touch control stage.

[0096] In at least one embodiment of the present invention, the driving circuit further comprises an output control circuit; the output control circuit is electrically connected to the control clock signal terminal, the driving signal output terminal and the first voltage terminal respectively;

[0097] The voltage providing circuit is used for providing the negative modulation voltage signal to the control clock signal terminal and the first voltage terminal during the touch control stage.

[0098] like Figure 7 As shown, the driving circuit may include an output control circuit 71;

[0099] The output control circuit 71 is electrically connected to the control clock signal terminal CLKB, the drive signal output terminal OT and the first voltage terminal V1 respectively, and is used to control the connection or disconnection between the drive signal output terminal OT and the first voltage terminal V1 under the control of the control clock signal provided by the control clock signal terminal CLKB;

[0100] The voltage providing circuit 11 is electrically connected to the control clock signal terminal CLKB and the first voltage terminal V1 respectively, and is used to provide the negative modulation voltage signal to the control clock signal terminal CLKB and the first voltage terminal V1 during the touch control stage.

[0101] like Figure 8 As shown, at least one embodiment of the driving circuit may include an output circuit 21;

[0102] The output circuit 21 is electrically connected to the first node PU, the output clock signal terminal CLK and the drive signal output terminal OT respectively, and is used to provide the output clock signal provided by the output clock signal terminal CLK to the drive signal output terminal OT under the control of the potential of the first node PU;

[0103] The driving circuit also includes a frame reset circuit 31;

[0104] The frame reset circuit 31 is electrically connected to the frame reset terminal STV0, the drive signal output terminal OT and the first voltage terminal V1 respectively, and is used to write the first voltage signal provided by the first voltage terminal V1 into the drive signal output terminal OT under the control of the frame reset signal provided by the frame reset terminal STV0;

[0105] The driving circuit further includes a first node control circuit 41;

[0106] The first node control circuit 41 is electrically connected to the first node PU, the input terminal I1, the first control voltage terminal VDS, the reset terminal RST, and the second control voltage terminal VSD, respectively, and is used to control the potential of the first node PU according to the first control voltage provided by the first control voltage terminal VDS and the second control voltage provided by the second control voltage terminal VSD under the control of the input signal provided by the input terminal I1 and the reset signal provided by the reset terminal RST;

[0107] The driving circuit further includes a second node control circuit 51;

[0108] The second node control circuit 51 is electrically connected to the second voltage terminal V2, the first node PU, the first voltage terminal V1, and the second node PD, respectively, and is used to control the potential of the second node PD according to the first voltage signal provided by the first voltage terminal V1 and the second voltage signal provided by the second voltage terminal V2 under the control of the potential of the first node PU;

[0109] The frame reset circuit 31 is also electrically connected to the first node PU, and is used to write the first voltage signal into the first node PU under the control of the frame reset signal;

[0110] The driving circuit further includes an output reset circuit 70;

[0111] The output reset circuit 70 is electrically connected to the second node PD, the drive signal output terminal OT and the first voltage terminal V1 respectively, and is used to write the first voltage signal provided by the first voltage terminal V1 into the drive signal output terminal OT under the control of the potential of the second node PD.

[0112] like Fig. 9 As shown, in Figure 8 Based on at least one embodiment shown in the figure, the first node control circuit includes a first transistor M1 and a second transistor M2, the frame reset circuit includes a third transistor M3 and a fourth transistor M4, the second node control circuit includes a fifth transistor M5, a sixth transistor M6, a seventh transistor M7 and an eighth transistor M8; the output circuit includes an output transistor M0, and the output reset circuit includes an output reset transistor MR; the drive circuit also includes a first capacitor C1; the first node control circuit also includes a ninth transistor M9;

[0113] The gate of M1 is electrically connected to the input terminal I1, the source of M1 is electrically connected to the first control voltage terminal VDS, and the drain of M1 is electrically connected to the first node PU;

[0114] The gate of M2 is electrically connected to the reset terminal RST, the source of M1 is electrically connected to the first node PU, and the drain of M1 is electrically connected to the low voltage terminal VGL;

[0115] The gate of M3 is electrically connected to the frame reset terminal STV0, the source of M3 is electrically connected to the drive signal output terminal OT, and the drain of M3 is electrically connected to the low voltage terminal VGL;

[0116] The gate of M4 is electrically connected to the frame reset terminal STV0, the source of M4 is electrically connected to the first node PU, and the drain of M4 is electrically connected to the low voltage terminal VGL;

[0117] The gate of M5 is electrically connected to the pull-down control node PDCN, the source of M5 is electrically connected to the high voltage terminal GCH, and the drain of M5 is electrically connected to the second node PD;

[0118] The gate of M6 is electrically connected to the first node PU, the source of M6 is electrically connected to the second node PD, and the drain of M6 is electrically connected to the low voltage terminal VGL;

[0119] The gate of M7 and the source of M7 are both electrically connected to the high voltage terminal GCH, and the drain of M7 is electrically connected to the pull-down control node PDCN;

[0120] The gate of M8 is electrically connected to the first node PU, the source of M8 is electrically connected to the pull-down control node PDCN, and the drain of M8 is electrically connected to the low voltage terminal VGL;

[0121] The gate of M9 is electrically connected to the second node PD, the source of M9 is electrically connected to the first node PU, and the drain of M9 is electrically connected to the low voltage terminal VGL;

[0122] The first end of C1 is electrically connected to the first node PU, and the second end of C1 is electrically connected to the driving signal output terminal OT;

[0123] The gate of M0 is electrically connected to the first node PU, the source of M0 is electrically connected to the output clock signal terminal CLK, and the drain of M0 is electrically connected to the drive signal output terminal OT;

[0124] The gate of MR is electrically connected to the second node PD, the source of MR is electrically connected to the driving signal output terminal OT, and the drain of MR is electrically connected to the low voltage terminal VGL.

[0125] exist Fig. 9 In at least one embodiment of the driving circuit shown, all transistors are n-type transistors, the gate of the switching transistor included in the pixel is electrically connected to the driving signal output terminal OT, and the switching transistor is an n-type transistor.

[0126] exist Fig. 9 In at least one embodiment of the driving circuit shown, in the display stage, the high voltage terminal GCH outputs a high voltage signal, and the low voltage terminal VGL outputs a low voltage signal.

[0127] like Fig.10 As shown, Fig. 9 At least one embodiment of the driving circuit shown in the figure is in operation, in the touch control stage ST,

[0128] Providing a positive modulation voltage signal to the output clock signal terminal CLK;

[0129] Providing a negative modulation voltage signal to the frame reset terminal STV0;

[0130] Providing a negative modulation voltage signal to the high voltage terminal GCH;

[0131] Providing a negative modulation voltage signal to the low voltage terminal VGL;

[0132] Providing a negative modulation voltage signal to the first control voltage terminal VDS;

[0133] Providing a negative modulation voltage signal to the second control voltage terminal VSD;

[0134] Providing a negative modulation voltage signal to the starting voltage terminal STV;

[0135] Providing a negative modulation voltage signal to the data line DL;

[0136] Providing a negative modulation voltage signal to the common electrode line Com;

[0137] In the touch stage ST, Fig. 9 The transistors in at least one embodiment of the driving circuit shown are all in an off state;

[0138] There is a first capacitor C1 between CLK and OT, and there is a large overlapping area. Under the coupling effect of C1, it can be achieved that in the touch stage ST, OT outputs a -2V voltage signal. At this time, the leakage current of the switching transistor in the pixel (the gate of the switching transistor is electrically connected to OT) is beneficial to controlling the touch noise and ensuring the effective release of the charge during the touch signal transmission process, so as to ensure that there is no screen flickering problem in the LPWG mode.

[0139] like Fig.11A As shown, Fig. 9 At least one embodiment of the driving circuit shown in the figure is in operation, in the touch control stage ST,

[0140] Providing a negative modulation voltage signal to the output clock signal terminal CLK;

[0141] Providing a negative modulation voltage signal to the frame reset terminal STV0;

[0142] Providing a negative modulation voltage signal to the high voltage terminal GCH;

[0143] Providing a negative modulation voltage signal to the low voltage terminal VGL;

[0144] Providing a negative modulation voltage signal to the first control voltage terminal VDS;

[0145] Providing a negative modulation voltage signal to the second control voltage terminal VSD;

[0146] Providing a negative modulation voltage signal to the starting voltage terminal STV;

[0147] Providing a negative modulation voltage signal to the data line DL;

[0148] Providing a negative modulation voltage signal to the common electrode line Com;

[0149] In the touch stage ST, Fig. 9 The transistors in at least one embodiment of the driving circuit shown are all in an off state;

[0150] There is a first capacitor C1 between CLK and OT, and there is a large overlapping area. Under the coupling effect of C1, it can be achieved that in the touch stage ST, OT outputs a -1V voltage signal. At this time, the leakage current of the switching transistor in the pixel (the gate of the switching transistor is electrically connected to OT) is beneficial to controlling the touch noise and ensuring the effective release of the charge during the touch signal transmission process, so as to ensure that there is no screen flickering problem in the LPWG mode.

[0151] Fig. 11B Schematic diagram of the relationship between the gate voltage Vg of the switching transistor and the drain current Id of the switching transistor;

[0152] exist Fig. 11B In the figure, the horizontal axis is the gate voltage Vg of the switching transistor, and the vertical axis is the leakage current of the switching transistor;

[0153] like Fig. 11B As shown, when the gate voltage Vg of the switching transistor is greater than or equal to -2V and less than or equal to -1V, the current value of Id is moderate, which is beneficial to controlling touch noise and ensuring the effective release of charges during touch signal transmission to ensure that there is no screen flickering problem in LPWG mode.

[0154] like Fig.12 As shown, at least one embodiment of the driving circuit may include a first node control circuit, an output circuit, an output reset circuit, a second node control circuit, a frame reset circuit and an output control circuit;

[0155] The first node control circuit includes a first transistor M1, a second transistor M2 and a ninth transistor M9, the frame reset circuit includes a third transistor M3, the second node control circuit includes a tenth transistor M10 and a second capacitor C2; the output circuit includes an output transistor M0, the output reset circuit includes an output reset transistor MR; the drive circuit also includes a first capacitor C1; the output control circuit includes an eleventh transistor M11 and a twelfth transistor M12;

[0156] The gate of M1 is electrically connected to the input terminal I1, the source of M1 is electrically connected to the first control voltage terminal VDS, and the drain of M1 is electrically connected to the first node PU;

[0157] The gate of M2 is electrically connected to the reset terminal RST, the source of M1 is electrically connected to the first node PU, and the drain of M1 is electrically connected to the low voltage terminal VGL;

[0158] The gate of M9 is electrically connected to the second node PD, the source of M9 is electrically connected to the first node PU, and the drain of M9 is electrically connected to the low voltage terminal VGL;

[0159] The gate of M10 is electrically connected to the first node PU, the source of M10 is electrically connected to the second node PD, and the drain of M10 is electrically connected to the low voltage terminal VGL;

[0160] The first end of C2 is electrically connected to the output clock signal end CLK, and the second end of C2 is electrically connected to the second node PD;

[0161] The gate of M3 is electrically connected to the frame reset terminal STV0, the source of M3 is electrically connected to the drive signal output terminal OT, and the drain of M3 is electrically connected to the low voltage terminal VGL;

[0162] The gate of M11 is electrically connected to the control clock signal terminal CLKB, the source of M11 is electrically connected to the drive signal output terminal OT, and the drain of M11 is electrically connected to the low voltage terminal VGL;

[0163] The gate of M12 is electrically connected to the first control terminal TPC, the source of M12 is electrically connected to the drive signal output terminal OT, and the drain of M12 is electrically connected to the low voltage terminal VGL;

[0164] The first end of C1 is electrically connected to the first node PU, and the second end of C1 is electrically connected to the driving signal output terminal OT;

[0165] The gate of M0 is electrically connected to the first node PU, the source of M0 is electrically connected to the output clock signal terminal CLK, and the drain of M0 is electrically connected to the drive signal output terminal OT;

[0166] The gate of MR is electrically connected to the second node PD, the source of MR is electrically connected to the driving signal output terminal OT, and the drain of MR is electrically connected to the low voltage terminal VGL.

[0167] exist Fig.12 In at least one embodiment of the driving circuit shown, all transistors are n-type transistors, the gate of the switch transistor included in the pixel is electrically connected to the driving signal output terminal OT, and the switch transistor is an n-type transistor.

[0168] like Fig.13 As shown, Fig.12 At least one embodiment of the driving circuit shown in the figure is in operation, in the touch control stage ST,

[0169] Providing a negative modulation voltage signal to the output clock signal terminal CLK;

[0170] Providing a negative modulation voltage signal to the frame reset terminal STV0;

[0171] Providing a negative modulation voltage signal to the low voltage terminal VGL;

[0172] Providing a negative modulation voltage signal to the first control voltage terminal VDS;

[0173] Providing a negative modulation voltage signal to the second control voltage terminal VSD;

[0174] Providing a negative modulation voltage signal to the starting voltage terminal STV;

[0175] Providing a negative modulation voltage signal to the control clock signal terminal CLKB;

[0176] Providing a negative modulation voltage signal to the first control terminal TPC;

[0177] Providing a negative modulation voltage signal to the data line DL;

[0178] Providing a negative modulation voltage signal to the common electrode line Com;

[0179] In the touch stage ST, Fig.12 The transistors in at least one embodiment of the driving circuit shown are all in an off state;

[0180] There is a first capacitor C1 between CLK and OT, and there is a large overlapping area. Under the coupling effect of C1, in the touch stage ST, the leakage current of the switching transistor in the pixel (the gate of the switching transistor is electrically connected to OT) is beneficial to controlling the touch noise and ensuring the effective release of the charge during the touch signal transmission process, so as to ensure that there is no screen flickering problem in the LPWG mode.

[0181] like Fig.14 As shown, at least one embodiment of the driving circuit may include a first node control circuit, an output circuit, an output reset circuit, a second node control circuit, a frame reset circuit and an output control circuit; the first node control circuit includes a first transistor M1, a second transistor M2 and a ninth transistor M9, and the frame reset circuit includes a third transistor M3, a fourth transistor M4 and a thirteenth transistor M13; the second node control circuit includes a tenth transistor M10, a fourteenth transistor M14 and a fifteenth transistor M15; the output circuit includes an output transistor M0, and the output reset circuit includes an output reset transistor MR; the driving circuit further includes a first capacitor C1; the output control circuit includes an eleventh transistor M11;

[0182] The gate of M1 is electrically connected to the input terminal I1, the source of M1 is electrically connected to the first control voltage terminal VDS, and the drain of M1 is electrically connected to the first node PU;

[0183] The gate of M2 is electrically connected to the reset terminal RST, the source of M1 is electrically connected to the first node PU, and the drain of M1 is electrically connected to the low voltage terminal VGL;

[0184] The gate of M9 is electrically connected to the second node PD, the source of M9 is electrically connected to the first node PU, and the drain of M9 is electrically connected to the low voltage terminal VGL;

[0185] The gate of M3 is electrically connected to the frame reset terminal STV0, the source of M3 is electrically connected to the drive signal output terminal OT, and the drain of M3 is electrically connected to the low voltage terminal VGL;

[0186] The gate of M4 is electrically connected to the frame reset terminal STV0, the source of M4 is electrically connected to the first node PU, and the drain of M4 is electrically connected to the low voltage terminal VGL;

[0187] The gate of M13 is electrically connected to the frame reset terminal STV0, the source of M13 is electrically connected to the second node PD, and the drain of M13 is electrically connected to the low voltage terminal VGL;

[0188] The gate of M14 and the source of M14 are electrically connected to the output clock signal terminal CLK, and the drain of M14 is electrically connected to the second node PD;

[0189] The gate of M10 is electrically connected to the first node PU, the source of M10 is electrically connected to the second node PD, and the drain of M10 is electrically connected to the low voltage terminal VGL;

[0190] The gate of M15 is electrically connected to the control clock signal terminal CLKB, the source of M15 is electrically connected to the second node PD, and the drain of M15 is electrically connected to the low voltage terminal VGL;

[0191] The gate of M11 is electrically connected to the control clock signal terminal CLKB, the source of M11 is electrically connected to the drive signal output terminal OT, and the drain of M11 is electrically connected to the low voltage terminal VGL;

[0192] The first end of C1 is electrically connected to the first node PU, and the second end of C1 is electrically connected to the driving signal output terminal OT;

[0193] The gate of M0 is electrically connected to the first node PU, the source of M0 is electrically connected to the output clock signal terminal CLK, and the drain of M0 is electrically connected to the drive signal output terminal OT;

[0194] The gate of MR is electrically connected to the second node PD, the source of MR is electrically connected to the driving signal output terminal OT, and the drain of MR is electrically connected to the low voltage terminal VGL.

[0195] exist Fig.14 In at least one embodiment of the driving circuit shown, all transistors are n-type transistors, the gate of the switch transistor included in the pixel is electrically connected to the driving signal output terminal OT, and the switch transistor is an n-type transistor.

[0196] like Fig.15 As shown, Fig.14 At least one embodiment of the driving circuit shown in the figure is in operation, in the touch control stage ST,

[0197] Providing a negative modulation voltage signal to the output clock signal terminal CLK;

[0198] Providing a negative modulation voltage signal to the frame reset terminal STV0;

[0199] Providing a negative modulation voltage signal to the low voltage terminal VGL;

[0200] Providing a negative modulation voltage signal to the first control voltage terminal VDS;

[0201] Providing a negative modulation voltage signal to the second control voltage terminal VSD;

[0202] Providing a negative modulation voltage signal to the starting voltage terminal STV;

[0203] Providing a negative modulation voltage signal to the control clock signal terminal CLKB;

[0204] Providing a negative modulation voltage signal to the data line DL;

[0205] Providing a negative modulation voltage signal to the common electrode line Com;

[0206] In the touch stage ST, Fig.14 The transistors in at least one embodiment of the driving circuit shown are all in an off state;

[0207] There is a first capacitor C1 between CLK and OT, and there is a large overlapping area. Under the coupling effect of C1, in the touch stage ST, the leakage current of the switching transistor in the pixel (the gate of the switching transistor is electrically connected to OT) is beneficial to controlling the touch noise and ensuring the effective release of the charge during the touch signal transmission process, so as to ensure that there is no screen flickering problem in the LPWG mode.

[0208] The voltage providing method described in the embodiment of the present invention is applied to the above-mentioned voltage providing module, and the voltage providing module is applied to a touch display device, and the touch display device includes a driving module and a plurality of pixels, and the driving module includes a multi-stage driving circuit, and the pixel includes a switching transistor; the driving circuit provides a driving signal for the gate of the switching transistor; and the voltage providing method includes:

[0209] In the touch control stage, the voltage supply circuit controls the driving signal by controlling the voltage signal provided to the driving circuit, so that the switching transistor is in the off state, and controls the leakage current of the switching transistor to be greater than or equal to 40pA and less than or equal to 120pA.

[0210] In the voltage providing method described in an embodiment of the present invention, in the touch stage, the voltage providing circuit controls the voltage signal provided to the driving circuit to control the driving signal provided to the gate of the switching transistor, so that the switching transistor is turned off, and the current value of the leakage current of the switching transistor is greater than or equal to 40pA and less than or equal to 120pA, which can ensure no screen flickering and avoid excessive noise.

[0211] In at least one embodiment of the present invention, the touch display device may include a plurality of pixels;

[0212] like Fig.16 As shown, the pixel includes a switching transistor KT and a pixel electrode PJ;

[0213] The gate of the switch transistor KT is electrically connected to the scan line GT, the source of the switch transistor KT is electrically connected to the data line DL, and the drain of the switch transistor KT is electrically connected to the pixel electrode PJ;

[0214] KT is an n-type transistor;

[0215] The scanning line GT is electrically connected to the driving signal output terminal of the driving circuit, receives the driving signal from the driving circuit, and provides the driving signal to the gate of the switching transistor KT.

[0216] Fig.16 In at least one embodiment of the illustrated pixel, when the driving circuit provides a high voltage signal to the gate of KT, KT is turned on to provide the data voltage provided by the data line DL to the pixel electrode PJ.

[0217] In a specific implementation, KT may also be a p-type transistor. When KT is a p-type transistor, the driving circuit provides a low voltage signal to the gate of KT to turn on KT and write the data voltage provided by the data line DL into the pixel electrode PJ.

[0218] In at least one embodiment of the present invention, the driving circuit includes an output circuit, the output circuit is electrically connected to the first node, the output clock signal terminal and the driving signal output terminal respectively, and the output circuit is used to provide the output clock signal provided by the output clock signal terminal to the driving signal output terminal under the control of the potential of the first node; the voltage providing method includes:

[0219] In the touch control stage, the voltage providing circuit provides a positive modulation voltage signal or a negative modulation voltage signal to the output clock signal terminal;

[0220] The forward modulation voltage signal is a superposition signal of a DC positive voltage signal and an AC modulation voltage signal, the voltage value of the forward modulation voltage signal is greater than 0, and the AC modulation voltage signal is a square wave voltage signal;

[0221] The negative modulation voltage signal is a superposition signal of a DC negative voltage signal and the AC modulation voltage signal, and a voltage value of the negative modulation voltage signal is less than 0.

[0222] In at least one embodiment of the present invention, the driving circuit further includes a frame reset circuit; the frame reset circuit is electrically connected to the frame reset terminal, the driving signal output terminal and the first voltage terminal respectively, and is used to write the first voltage signal provided by the first voltage terminal to the driving signal output terminal under the control of the frame reset signal provided by the frame reset terminal; the voltage providing method includes:

[0223] In the touch control stage, the voltage providing circuit is used to provide the negative modulation voltage signal to the frame reset terminal and the first voltage terminal.

[0224] The touch display device described in the embodiment of the present invention includes a driving module and a plurality of pixels, wherein the pixels include switching transistors; the driving circuit provides a driving signal for the gate of the switching transistor; and the touch display device also includes the above-mentioned voltage providing module.

[0225] The touch display device described in at least one embodiment of the present invention includes a timing controller;

[0226] The voltage providing module is included in the timing controller.

[0227] In at least one embodiment of the present invention, the pixel further comprises a pixel electrode; the gate of the switch transistor is electrically connected to the drive signal output terminal of the drive circuit, the first electrode of the switch transistor is electrically connected to the corresponding column data line, and the second electrode of the switch transistor is electrically connected to the pixel electrode;

[0228] The driving circuit includes an output circuit, an energy storage circuit and a frame reset circuit;

[0229] The output circuit is electrically connected to the first node, the output clock signal terminal and the drive signal output terminal respectively, and is used to provide the output clock signal provided by the output clock signal terminal to the drive signal output terminal under the control of the potential of the first node;

[0230] The first end of the energy storage circuit is electrically connected to the first node, and the second end of the energy storage circuit is electrically connected to the drive signal output end;

[0231] The frame reset circuit is electrically connected to the frame reset terminal, the drive signal output terminal and the first voltage terminal respectively, and is used to write the first voltage signal provided by the first voltage terminal into the drive signal output terminal under the control of the frame reset signal provided by the frame reset terminal.

[0232] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A voltage supply module, applied to a touch display device, the touch display device comprising a driving module and a plurality of pixels, the driving module comprising a multi-stage driving circuit, the pixels comprising a switching transistor; the driving circuit providing a driving signal to a gate of the switching transistor; characterized in that: The voltage supply module includes a voltage supply circuit; The voltage supply circuit is used to control the driving signal by controlling the voltage signal provided to the driving circuit during the touch stage, so that the switching transistor is in an off state and the leakage current of the switching transistor is controlled to be greater than or equal to 40pA and less than or equal to 120pA.

2. The voltage supply module according to claim 1, wherein: The driving circuit comprises an output circuit, the output circuit is electrically connected to the first node, the output clock signal terminal and the driving signal output terminal respectively, and the output circuit is used to provide the output clock signal provided by the output clock signal terminal to the driving signal output terminal under the control of the potential of the first node; The voltage providing circuit is used to provide a positive modulation voltage signal or a negative modulation voltage signal to the output clock signal terminal during the touch control stage; The positive modulation voltage signal is a superposition signal of a DC positive voltage signal and an AC modulation voltage signal, the voltage value of the positive modulation voltage signal is greater than 0, and the AC modulation voltage signal is a square wave voltage signal; the negative modulation voltage signal is a superposition signal of a DC negative voltage signal and the AC modulation voltage signal, and the voltage value of the negative modulation voltage signal is less than 0.

3. The voltage supply module according to claim 2, wherein: The driving circuit further includes a frame reset circuit; the frame reset circuit is electrically connected to the frame reset terminal, the driving signal output terminal and the first voltage terminal respectively, and is used to write the first voltage signal provided by the first voltage terminal into the driving signal output terminal under the control of the frame reset signal provided by the frame reset terminal; The voltage providing circuit is used for providing the negative modulation voltage signal to the frame reset terminal and the first voltage terminal during the touch control stage.

4. The voltage supply module according to claim 2, wherein: The driving circuit further includes a first node control circuit; the first node control circuit is electrically connected to the first node, the input terminal, the first control voltage terminal, the reset terminal, and the second control voltage terminal, respectively, and is used to control the potential of the first node according to a first control voltage provided by the first control voltage terminal and a second control voltage provided by the second control voltage terminal under the control of an input signal provided by the input terminal and a reset signal provided by the reset terminal; The voltage providing circuit is used for providing the negative modulation voltage signal to the first control voltage terminal and the second control voltage terminal during the touch control stage.

5. The voltage supply module according to claim 2, wherein: The driving circuit further includes a second node control circuit; the second node control circuit is electrically connected to the second voltage terminal, the first node, the first voltage terminal and the second node respectively, and is used to control the potential of the second node according to a first voltage signal provided by the first voltage terminal and a second voltage signal provided by the second voltage terminal under the control of the potential of the first node; The voltage providing circuit is used for providing the negative modulation voltage signal to the first voltage terminal and the second voltage terminal during the touch control stage.

6. The voltage supply module according to claim 2, wherein: The driving circuit further includes an output control circuit; the output control circuit is electrically connected to the control clock signal terminal, the driving signal output terminal and the first voltage terminal respectively, and is used to control the connection or disconnection between the driving signal output terminal and the first voltage terminal under the control of the control clock signal provided by the control clock signal terminal; The voltage providing circuit is used for providing the negative modulation voltage signal to the control clock signal terminal and the first voltage terminal during the touch control stage.

7. The voltage supply module according to claim 2, wherein: The input terminal of the first-stage driving circuit included in the driving module is electrically connected to the starting voltage terminal; The voltage providing circuit is used for providing a negative modulation voltage signal to the starting voltage terminal during the touch control stage.

8. A voltage supply method, applied to the voltage supply module according to any one of claims 1 to 7, wherein the voltage supply module is applied to a touch display device, wherein the touch display device comprises a driving module and a plurality of pixels, wherein the driving module comprises a multi-stage driving circuit, and the pixels comprise a switching transistor; wherein the driving circuit provides a driving signal for a gate of the switching transistor; wherein: The voltage providing method comprises: In the touch control stage, the voltage supply circuit controls the driving signal by controlling the voltage signal provided to the driving circuit, so that the switching transistor is in the off state, and controls the leakage current of the switching transistor to be greater than or equal to 40pA and less than or equal to 120pA.

9. The voltage providing method according to claim 8, wherein: The driving circuit comprises an output circuit, the output circuit is electrically connected to the first node, the output clock signal terminal and the driving signal output terminal respectively, and the output circuit is used to provide the output clock signal provided by the output clock signal terminal to the driving signal output terminal under the control of the potential of the first node; The voltage providing method comprises: In the touch control stage, the voltage providing circuit provides a positive modulation voltage signal or a negative modulation voltage signal to the output clock signal terminal; The positive modulation voltage signal is a superposition signal of a DC positive voltage signal and an AC modulation voltage signal, the voltage value of the positive modulation voltage signal is greater than 0, and the AC modulation voltage signal is a square wave voltage signal; the negative modulation voltage signal is a superposition signal of a DC negative voltage signal and the AC modulation voltage signal, and the voltage value of the negative modulation voltage signal is less than 0.

10. The voltage providing method according to claim 9, wherein: The driving circuit further includes a frame reset circuit; the frame reset circuit is electrically connected to the frame reset terminal, the driving signal output terminal and the first voltage terminal respectively, and is used to write the first voltage signal provided by the first voltage terminal into the driving signal output terminal under the control of the frame reset signal provided by the frame reset terminal; The voltage providing method comprises: In the touch control stage, the voltage providing circuit is used to provide the negative modulation voltage signal to the frame reset terminal and the first voltage terminal.

11. A touch display device, comprising a driving module and a plurality of pixels, wherein the pixels comprise switching transistors; the driving circuit provides a driving signal for a gate of the switching transistor; characterized in that: The touch display device further comprises a voltage providing module as claimed in any one of claims 1 to 7.

12. The touch display device according to claim 11, wherein: Including timing controller; The voltage providing module is included in the timing controller.

13. The touch display device according to claim 11 or 12, characterized in that: The pixel further comprises a pixel electrode; the gate of the switch transistor is electrically connected to the drive signal output terminal of the drive circuit, the first electrode of the switch transistor is electrically connected to the corresponding column data line, and the second electrode of the switch transistor is electrically connected to the pixel electrode; The driving circuit includes an output circuit, an energy storage circuit and a frame reset circuit; The output circuit is electrically connected to the first node, the output clock signal terminal and the drive signal output terminal respectively, and is used to provide the output clock signal provided by the output clock signal terminal to the drive signal output terminal under the control of the potential of the first node; The first end of the energy storage circuit is electrically connected to the first node, and the second end of the energy storage circuit is electrically connected to the drive signal output end; The frame reset circuit is electrically connected to the frame reset terminal, the drive signal output terminal and the first voltage terminal respectively, and is used to write the first voltage signal provided by the first voltage terminal into the drive signal output terminal under the control of the frame reset signal provided by the frame reset terminal.

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