CN112216244A

CN112216244A - Display panel, driving method thereof and display module

Info

Publication number: CN112216244A
Application number: CN202011193222.1A
Authority: CN
Inventors: 张蒙蒙; 周星耀
Original assignee: Shanghai Tianma AM OLED Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-01-12
Anticipated expiration: 2040-10-30
Also published as: CN112216244B

Abstract

The embodiment of the invention provides a display panel, a driving method thereof and a display module. The display panel includes a plurality of light emitting elements and a plurality of pixel circuits, the pixel circuits including a driving transistor, a reset transistor, and at least one double gate transistor; the control end of the driving transistor is electrically connected with the first node, and the driving transistor is used for supplying driving current to the light-emitting element under the control of the first node; the output end of the double-gate transistor is electrically connected with the first node; the output end of the reset transistor is electrically connected with the first node, and the reset transistor is used for resetting the first node under the control of the first scanning signal end; the pixel circuit further comprises a potential stabilizing module, wherein the input end of the potential stabilizing module is electrically connected with the potential stabilizing signal end, and the output end of the potential stabilizing module is electrically connected with the first node. The invention can stabilize the first node potential and improve the flicker problem of the display picture.

Description

Display panel, driving method thereof and display module

Technical Field

The invention relates to the technical field of display, in particular to a display panel, a driving method thereof and a display module.

Background

Organic Light-Emitting diodes (OLEDs) have the advantages of low power consumption, low cost, self-luminescence, wide viewing angle, and fast response speed, and become one of the research hotspots in the display field at present. The electronic product can display in different application scenes by adopting different refresh rates, for example, a driving mode with a higher refresh rate is adopted to drive and display a dynamic picture so as to ensure the fluency of the displayed picture; and a driving mode with a lower refresh rate is adopted to drive and display the static picture so as to reduce the power consumption. When an electronic product adopting the organic self-luminous technology is displayed at a low refresh rate, a flicker phenomenon occurs, and visual experience is influenced. And the larger the ambient light intensity is, the more serious the flicker phenomenon is.

Disclosure of Invention

The embodiment of the invention provides a display panel, a driving method thereof and a display module, which are used for solving the problem of flicker of a display picture under low-frequency driving.

In a first aspect, an embodiment of the present invention provides a display panel, which includes a plurality of light emitting elements and a plurality of pixel circuits, where the pixel circuits are electrically connected to the light emitting elements;

the pixel circuit comprises a driving transistor, a reset transistor and at least one double-gate transistor;

the control end of the driving transistor is electrically connected with the first node, the input end of the driving transistor is electrically connected with the second node, the output end of the driving transistor is electrically connected with the third node, and the driving transistor is used for providing driving current for the light-emitting element under the control of the first node; the output end of the double-gate transistor is electrically connected with the first node;

the control end of the reset transistor is electrically connected with the first scanning signal end, the input end of the reset transistor is electrically connected with the reset voltage end, the output end of the reset transistor is electrically connected with the first node, and the reset transistor is used for resetting the first node under the control of the first scanning signal end;

the pixel circuit further comprises a potential stabilizing module, wherein the input end of the potential stabilizing module is electrically connected with the potential stabilizing signal end, and the output end of the potential stabilizing module is electrically connected with the first node.

In a second aspect, an embodiment of the present invention provides a display module, including a display panel and a driving chip, where the driving chip is electrically connected to the display panel; the display panel comprises multiple light emitting elements and multiple pixel circuits electrically connected with the light emitting elements

The pixel circuit comprises a driving transistor, a reset transistor and at least one double-gate transistor; the control end of the driving transistor is electrically connected with the first node, the input end of the driving transistor is electrically connected with the second node, the output end of the driving transistor is electrically connected with the third node, and the driving transistor is used for providing driving current for the light-emitting element under the control of the first node; the output end of the double-gate transistor is electrically connected with the first node;

the pixel circuit further comprises a potential stabilizing module, wherein the input end of the potential stabilizing module is electrically connected with the potential stabilizing signal end, and the output end of the potential stabilizing module is electrically connected with the first node;

the driving chip is used for driving the display panel to work in a first display stage and a second display stage, and the refresh rate of the display panel in the first display stage is smaller than that in the second display stage; wherein the content of the first and second substances,

and the electric potential stabilizing module is used for compensating the leakage current of the double-grid transistor after the voltage signal of the control end of the double-grid transistor jumps from an effective level signal to a non-effective level signal at least when the display panel works in the first display stage so as to stabilize the electric potential of the first node.

In a third aspect, an embodiment of the present invention provides a driving method of a display panel, the display panel including a plurality of light emitting elements and a plurality of pixel circuits, the pixel circuits being electrically connected to the light emitting elements;

the pixel circuit comprises a driving transistor, a reset transistor and at least one double-gate transistor; the control end of the driving transistor is electrically connected with the first node, the input end of the driving transistor is electrically connected with the second node, the output end of the driving transistor is electrically connected with a third node, the third node is connected to the anode of the light-emitting element, and the driving transistor is used for providing driving current for the light-emitting element under the control of the first node; the output end of the double-gate transistor is electrically connected with the first node;

the pixel circuit further comprises a potential stabilizing module, wherein the input end of the potential stabilizing module is electrically connected with the potential stabilizing signal end, and the output end of the potential stabilizing module is electrically connected with the first node; the driving method is characterized by comprising the following steps:

controlling the display panel to work in a first display stage, comprising: the control potential stabilizing module compensates the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from the effective level signal to the non-effective level signal so as to stabilize the potential of the first node;

and controlling the display panel to work in a second display stage, wherein the refresh rate of the display panel in the first display stage is smaller than that in the second display stage.

The display panel, the driving method thereof and the display module provided by the embodiment of the invention have the following beneficial effects: the potential stabilizing module is arranged in the pixel circuit, the output end of the potential stabilizing module is electrically connected with the first node, and the potential stabilizing module can compensate the leakage current of the double-gate transistor to the first node after the voltage signal of the control end of the double-gate transistor jumps from an effective level signal to a non-effective level signal, so that the potential change of the first node is reduced, the potential of the first node is stabilized, the problem of flicker of a display picture is improved, and the display effect is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the invention;

fig. 3 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the invention;

fig. 4 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the invention;

fig. 5 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the invention;

fig. 6 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the invention;

fig. 7 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the invention;

fig. 8 is a schematic diagram of another alternative implementation of a pixel circuit in a display panel according to an embodiment of the present invention;

FIG. 9 is a timing diagram of the pixel circuit provided in the embodiment of FIG. 8;

FIG. 10 is a schematic view of a display module according to an embodiment of the present invention;

fig. 11 is a schematic view of another alternative implementation of a display module according to an embodiment of the disclosure;

FIG. 12 is a timing diagram of signals provided by a main stable control terminal of the display module according to the embodiment of the present invention;

fig. 13 is a schematic diagram of an alternative implementation of a display module according to an embodiment of the disclosure;

FIG. 14 is a driving timing diagram of a display module according to an embodiment of the present invention;

fig. 15 is a flowchart illustrating a driving method of a display panel according to an embodiment of the invention;

fig. 16 is another flowchart of a driving method of a display panel according to an embodiment of the invention;

fig. 17 is another flowchart of a driving method of a display panel according to an embodiment of the invention;

fig. 18 is another flowchart of a driving method of a display panel according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The embodiment of the invention provides a display panel, which comprises a plurality of light-emitting elements and a plurality of pixel circuits, wherein the pixel circuits are electrically connected with the light-emitting elements. Typically, the light emitting element is an organic light emitting diode, and the light emitting element includes an anode, a light emitting layer, and a cathode. The pixel circuit is electrically connected with the anode of the light-emitting element, and when displaying, the pixel circuit provides driving current for the light-emitting element to control the light-emitting element to emit light, so that the display of the display panel is realized.

The pixel circuit of the display panel provided by the embodiment of the invention comprises a double-gate transistor, wherein the output end of the double-gate transistor is connected to the control end of a driving transistor, a certain parasitic capacitance exists between the middle node of the double-gate transistor and the control end of the double-gate transistor, when a signal of the control end of the double-gate transistor jumps (a high-level signal jumps to a low-level signal, or a low-level signal jumps to a high-level signal), the potential of the middle node of the double-gate transistor is influenced, and when the control end of the double-gate transistor jumps from a high-level signal to a low-level signal, the potential of the middle node is pulled down; when the control end of the double-gate transistor jumps from a low-level signal to a high-level signal, the potential of the middle node is pulled high. In the process of driving the light-emitting element to emit light by the pixel circuit, the intermediate node of the double-gate transistor leaks to the control end of the driving transistor, so that the potential stability of the control end of the driving transistor is influenced, and a display picture flickers. According to the embodiment of the invention, the potential stabilizing module is arranged in the pixel circuit, the output end of the potential stabilizing module is electrically connected with the first node, and the potential stabilizing module is used for compensating the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from the effective level signal to the non-effective level signal so as to stabilize the potential of the first node, so that the problem of display image flicker is improved, and the display effect is improved.

In some embodiments, the reset transistor in the pixel circuit is a double gate transistor; in other embodiments, the threshold compensation transistor in the pixel circuit is a double gate transistor; in another embodiment, the reset transistor and the threshold compensation transistor are dual gate transistors; in another embodiment, the pixel circuit further comprises a functional transistor, an output terminal of which is connected to the control terminal of the drive transistor, which may be arranged as a double gate transistor. The transistor connected with the control end of the driving transistor is set to be a double-gate transistor, leakage current of the double-gate transistor in an off state is small, and leakage current of the transistor to the control end of the driving transistor in the off state can be reduced.

Specifically, in an embodiment, fig. 1 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the present invention. As shown in fig. 1, the pixel circuit includes a driving transistor Tm, a reset transistor T1; the reset transistor T1 is a double-gate transistor. A control terminal of the driving transistor Tm is electrically connected to the first node N1, an input terminal of the driving transistor Tm is electrically connected to the second node N2, an output terminal of the driving transistor Tm is electrically connected to the third node N3, and the driving transistor Tm is used to supply a driving current to the light emitting element OL under the control of the first node N1. In the embodiment of fig. 1, transistors are illustrated as p-type transistors, and it should be noted that in the embodiment of the present invention, the transistors may also be n-type transistors, or both n-type transistors and p-type transistors may be included in a pixel circuit.

A control terminal of the reset transistor T1 is electrically connected to the first scan signal terminal S1, an input terminal of the reset transistor T1 is electrically connected to a reset voltage terminal Ref, an output terminal of the reset transistor T1 is electrically connected to the first node N1, and the reset transistor T1 is used to reset the first node N1 under the control of the first scan signal terminal S1.

The pixel circuit further includes a potential stabilizing module 10, an input terminal of the potential stabilizing module 10 is electrically connected to the potential stabilizing signal terminal W, and an output terminal of the potential stabilizing module 10 is electrically connected to the first node N1. The voltage stabilizing module 10 is configured to compensate for the leakage of the dual-gate transistor after the voltage signal at the control terminal of the dual-gate transistor transitions from the active level signal to the inactive level signal, so as to stabilize the voltage level of the first node N1.

As illustrated in fig. 1, the pixel circuit further includes a data writing module 20, a light emitting control module 30, and a light emitting element resetting module 40 and a compensation module 50, wherein the data writing module 20 is configured to provide a data signal to the driving transistor Tm, the compensation module 50 is configured to compensate for a threshold voltage of the driving transistor Tm, and the light emitting control module 30 is respectively connected in series with the driving transistor and the light emitting element and configured to control whether a driving current flows through the light emitting element; the light emitting element resetting module 40 is used to reset the electrodes of the light emitting elements.

The driving period of the pixel circuit includes at least a node reset phase, a data write phase, and a light emitting phase. In the node reset phase, the reset voltage terminal Ref supplies a reset signal to the input terminal of the reset transistor T1, the reset transistor T1 supplies the reset signal to the first node N1, and the first node N1, i.e., the control terminal (gate) of the driving transistor Tm, is reset. In the data write phase, the data signal is written to the first node N1. In the light-emitting period, which is the potential maintaining period of the first node N1, the driving transistor Tm generates the driving current under the control of the potential of the first node N1. Wherein the resetting of the light emitting element OL by the light emitting element resetting module 40 may occur in a node resetting phase or a data writing phase.

Taking the example illustrated in fig. 1, the reset transistor T1 is a double-gate transistor, the intermediate node of the double-gate transistor is N4, and the reset transistor T1 is a p-type transistor. In the node reset phase, the first scan signal terminal S1 provides an active level signal to control the reset transistor T1 to turn on, so as to provide the reset signal transmitted from the reset voltage terminal Ref to the first node N1, and reset the first node N1. Due to the parasitic capacitance between the control terminal of the reset transistor T1 and the intermediate node N4, the potential of the intermediate node N4 of the reset transistor T1 is pulled high when the voltage signal at the first scan signal terminal S1 transitions from the active level signal to the inactive level signal. In the period of maintaining the potential of the first node N1, when the driving transistor Tm is controlled to generate the driving current by the potential of the first node N1, the high potential of the node N4 leaks to the first node N1, so that the potential of the first node N1 is raised, which causes the luminance of the light emitting element OL driven by the pixel circuit to decrease, and the image flicker occurs.

In the embodiment of the invention, the pixel circuit is provided with the potential stabilizing module, the output end of the potential stabilizing module is electrically connected with the first node, and the potential stabilizing module can compensate the leakage current of the reset transistor to the first node after the voltage signal of the control end of the reset transistor jumps from the effective level signal to the non-effective level signal, so that the potential of the first node can be stabilized, the problem of display image flicker is improved, and the display effect is improved.

In another embodiment, fig. 2 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the present invention. As shown in fig. 2, the pixel circuit includes a driving transistor Tm, a reset transistor T1 and a compensation module 50, and the compensation module 50 includes a compensation transistor T2, wherein the compensation transistor T2 is a double-gate transistor and the reset transistor T1 is a single-gate transistor. A control terminal of the compensation transistor T2 is electrically connected to the second scan signal terminal S2, an input terminal of the compensation transistor T2 is electrically connected to the third node N3, an output terminal of the compensation transistor T2 is electrically connected to the first node N1, and the compensation transistor T2 is used to perform threshold compensation on the driving transistor Tm under the control of the second scan signal terminal S2.

In addition, other structures illustrated in fig. 2 can refer to the description in the embodiment of fig. 1 described above.

The compensation transistor T2 illustrated in fig. 2 is a double-gate transistor having an intermediate node of N5, and the compensation transistor T2 is a p-type transistor. In the node reset phase, the first scan signal terminal S1 provides an active level signal to control the reset transistor T1 to turn on, so as to provide the reset signal transmitted from the reset voltage terminal Ref to the first node N1, and reset the first node N1. In the data writing phase, the data writing module 20 writes the data signal into the second node N2, the driving transistor Tm turns on the second node N2 and the third node N3 under the control of the potential of the first node N1, the second scan signal terminal S2 provides an active level signal to control the compensation transistor T2 to turn on, and the third node N3 and the first node N1 to turn on, so as to write the data signal into the first node N1 while compensating for the threshold voltage of the driving transistor Tm. Due to the parasitic capacitance between the control terminal of the compensation transistor T2 and the intermediate node N5, the potential of the intermediate node N5 of the compensation transistor T2 is pulled high when the voltage signal of the second scan signal terminal S2 transits from the active level signal to the inactive level signal. In the period of maintaining the potential of the first node N1, when the driving transistor Tm is controlled to generate the driving current by the potential of the first node N1, the high potential of the node N5 leaks to the first node N1, so that the potential of the first node N1 is raised, which causes the luminance of the light emitting element OL driven by the pixel circuit to decrease, and the image flicker occurs.

In the embodiment of fig. 2, the potential stabilizing module 10 is disposed in the pixel circuit, the output terminal of the potential stabilizing module 10 is electrically connected to the first node N1, and the potential stabilizing module 10 can compensate the leakage current from the intermediate node N5 of the compensating transistor T2 to the first node N1 after the voltage signal at the control terminal of the compensating transistor T2 jumps from the active level signal to the inactive level signal, so as to stabilize the potential of the first node N1, thereby improving the flicker problem of the display image and enhancing the display effect.

In another embodiment, fig. 3 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the present invention. As shown in fig. 3, the pixel circuit includes a driving transistor Tm, a reset transistor T1, and a compensation transistor T2; the reset transistor T1 and the compensation transistor T2 are double-gate transistors. A control terminal of the driving transistor Tm is electrically connected to the first node N1, an input terminal of the driving transistor Tm is electrically connected to the second node N2, and an output terminal of the driving transistor Tm is electrically connected to the third node N3. A control terminal of the reset transistor T1 is electrically connected to the first scan signal terminal S1, an input terminal of the reset transistor T1 is electrically connected to the reset voltage terminal Ref, and an output terminal of the reset transistor T1 is electrically connected to the first node N1. A control terminal of the compensation transistor T2 is electrically connected to the second scan signal terminal S2, an input terminal of the compensation transistor T2 is electrically connected to the third node N3, and an output terminal of the compensation transistor T2 is electrically connected to the first node N1. The pixel circuit further includes a potential stabilizing module 10, an input terminal of the potential stabilizing module 10 is electrically connected to the potential stabilizing signal terminal W, and an output terminal of the potential stabilizing module 10 is electrically connected to the first node N1. In addition, other structures illustrated in fig. 3 can refer to the description in the embodiment of fig. 1 described above.

The reset transistor T1 and the compensation transistor T2 illustrated in fig. 3 are both double-gate transistors, the intermediate node of the reset transistor T1 is N4, the intermediate node of the compensation transistor T2 is N5, and the reset transistor T1 and the compensation transistor T2 are both p-type transistors. As can be understood from the above description of the embodiment of fig. 1 and 2, there is a certain parasitic capacitance in the reset transistor T1, and when the voltage signal at the first scan signal terminal S1 jumps from an active level signal to an inactive level signal, the potential of the intermediate node N4 of the reset transistor T1 is pulled high. The compensation transistor T2 has a parasitic capacitance, and when the voltage signal at the second scan signal terminal S2 changes from an active level signal to an inactive level signal, the potential of the intermediate node N5 of the compensation transistor T2 is pulled high. In the stage of maintaining the potential of the first node N1, when the driving transistor Tm is controlled to generate a driving current by the potential of the first node N1, the high potential of the node N4 and the high potential of the node N5 drain to the first node N1 at the same time, so that the potential of the first node N1 is raised, which causes the luminance of the light emitting element OL driven by the pixel circuit to decrease, and the image flicker occurs.

In the embodiment of fig. 3, the potential stabilizing module 10 is disposed in the pixel circuit, the output terminal of the potential stabilizing module 10 is electrically connected to the first node N1, and the potential stabilizing module 10 can compensate the leakage current of the intermediate node N4 and the intermediate node N5 to the first node N1 after the voltage signals of the control terminal of the reset transistor T1 and the control terminal of the compensation transistor T2 jump from the active level signal to the inactive level signal, so as to stabilize the potential of the first node N1, thereby improving the flicker problem of the display image and enhancing the display effect.

In an embodiment, the compensation transistor and the reset transistor are both dual-gate transistors, and fig. 4 is another structural schematic diagram of a pixel circuit in a display panel provided by an embodiment of the present invention. As shown in fig. 4, the potential stabilization block 10 includes a first transistor M1 and a second transistor M2; the control terminal of the first transistor M1 is electrically connected to the first potential stabilization control terminal C1, and the input terminal of the first transistor M1 is electrically connected to the input terminal of the potential stabilization module 10, that is, the input terminal of the first transistor M1 is electrically connected to the potential stabilization signal terminal W, and the output terminal of the first transistor M1 is electrically connected to the input terminal of the second transistor M2; the control terminal of the second transistor M2 is electrically connected to the main stable control terminal Z, and the output terminal of the second transistor M2 is electrically connected to the output terminal of the voltage stabilizing module 10, i.e., the output terminal of the second transistor M2 is electrically connected to the first node N1. The connection node between the output of the first transistor M1 and the input of the second transistor M2 is illustrated as node N6.

In a driving period in which the pixel circuit drives the light emitting element, first, the first scan signal terminal S1 supplies an active level signal to control the reset transistor T1 to be turned on, and a signal of the reset voltage terminal Ref is supplied to the first node N1 to reset the first node N1; then the data writing module 20 controls to provide the data signal to the second node N2, and at the same time the driving transistor Tm controls to turn on the second node N2 and the third node N3 under the control of the potential of the first node N1, and at the same time the second scan signal terminal S2 provides the active level signal to control the compensation transistor T2 to turn on, and turn on the third node N3 and the first node N1, thereby dropping the data signal into the first node N1; then, in the first node N1 potential maintaining phase, the driving transistor Tm generates a driving current under the control of the first node N1 potential, and the light emission control module 30 controls the driving current to flow through the light emitting element to control the light emitting element to emit light.

When the reset transistor T1 is a dual gate transistor, the intermediate node N4 of the reset transistor T1 starts to leak to the first node N1 after the voltage signal provided from the first scan signal terminal S1 is negated by the transition of the active level signal. When the compensating transistor T2 is a double gate transistor, the intermediate node N5 of the compensating transistor T2 starts to leak to the first node N1 after the voltage signal provided at the second scan signal terminal S2 is a non-active level signal transited by an active level signal. Wherein, in one driving period, the signal transition of the first scan signal terminal S1 occurs before the signal transition of the second scan signal terminal S2. Therefore, when the reset transistor T1 and the compensation transistor T2 are dual gate transistors, the set potential stabilizing module 10 can start compensating for the drain of the reset transistor T1 after the signal transition of the first scan signal terminal S1.

Specifically, in the light emitting stage in which the first node N1 controls the driving transistor Tm to generate the driving current, the first potential stabilizing control terminal C1 provides the inactive level signal to control the first transistor M1 to turn off, the main stabilizing control terminal Z provides the active level signal to control the second transistor M2 to turn on, the potential stabilizing signal terminal W provides a smaller voltage signal to the node N6 through the leakage current of the first transistor M1 in the off state, the node N6 is at the low potential, and the leakage current to the first node N1 through the low potential of the node N6 can compensate the high potential of the intermediate node N4 and the leakage current to the first node N1 through the high potential of the intermediate node N5, so as to stabilize the potential of the first node N1, improve the problem of display flicker, and improve the display effect.

Optionally, the first potential stabilizing control terminal C1 may multiplex control ports in the pixel circuit, so as to reduce the number of ports in the pixel circuit and simplify the control manner of the pixel circuit. The potential stabilization signal terminal W may multiplex signal ports in the pixel circuit to reduce the number of signal lines provided in the display panel, thereby simplifying the wiring scheme.

The main stable control terminal Z may be connected to a driving chip of the display panel, and the driving chip provides a signal to the main stable control terminal Z, and specifically, in a light emitting stage, the driving chip provides an active level signal to the main stable control terminal Z to control the second transistor M2 to be turned on. In another embodiment, the effective level signal provided by the driver chip to the main stability control terminal Z is a gradually changing voltage signal to control the turning-on degree of the second transistor M2 to gradually decrease, so as to ensure that the low potential of the node N6 is gradually decreased toward the leakage of the first node N1, thereby avoiding the transient compensation of the potential stabilizing module 10 to the potential of the first node N1.

Specifically, fig. 5 is a schematic structural diagram of another pixel circuit in the display panel according to the embodiment of the present invention. As shown in fig. 5, the first scanning signal terminal S1 is multiplexed as a first potential stabilization control terminal. That is, the control terminal of the first transistor M1 is electrically connected to the first scan signal terminal S1. In a driving period of the pixel circuit, the first scan signal terminal S1 provides an active level signal in a node reset phase to control resetting of the first node N1; the first scan signal terminal S1 provides a non-active level signal in both the subsequent data writing phase and the subsequent light emitting phase. The first scan signal terminal S1 is arranged to be multiplexed as a first potential stabilization control terminal, so that it can be ensured that the first scan signal terminal S1 provides an inactive level signal to control the first transistor M1 to turn off during the light emitting period, and further, the potential stabilization signal terminal W provides a smaller voltage signal to the node N6 through the drain current of the first transistor M1 in the off state, so that the node N6 is at a low potential. Meanwhile, through multiplexing of the first scanning signal end, control ports of the pixel circuit can be reduced, the number of control lines in the display panel is further reduced, and a circuit wiring mode in the display panel is simplified.

Further, as shown with continued reference to fig. 5, the reset voltage terminal Ref is multiplexed as a potential stabilization signal terminal, that is, the input terminal of the first transistor M1 is electrically connected to the reset voltage terminal Ref. When the driving transistor Tm is a p-type transistor, the reset voltage terminal Ref provides a low level signal to reset the first node N1. The reset voltage terminal Ref is multiplexed as a potential stabilizing signal terminal, so that when the first transistor M1 is controlled to be in an off state in a light emitting stage, the reset voltage terminal Ref provides a smaller voltage signal to the node N6 through the leakage current of the first transistor M1 in the off state, so that the node N6 is at a low potential. Meanwhile, the input ports of the pixel circuits can be reduced by multiplexing the reset voltage ends, so that the number of signals in the display panel is reduced, and the circuit wiring mode in the display panel is further simplified.

In another embodiment, the compensation transistor and the reset transistor are both double-gate transistors, and fig. 6 is another structural schematic diagram of a pixel circuit in the display panel provided by the embodiment of the invention. As shown in fig. 6, the potential stabilizing module 10 includes a third transistor M3, a control terminal of the third transistor M3 is electrically connected to the main stabilizing control terminal Z, an input terminal of the third transistor M3 is electrically connected to the input terminal of the potential stabilizing module 10, and an output terminal of the third transistor M3 is electrically connected to the output terminal of the potential stabilizing module 10. That is, the input terminal of the third transistor M3 is electrically connected to the potential stabilization signal terminal W, and the output terminal of the third transistor M3 is electrically connected to the first node N1. The operation of the pixel circuit and the leakage of the node N4 and the node N5 to the first node N1 during the light emitting period can be understood with reference to the embodiment of fig. 4, and will not be described herein again.

In the embodiment of fig. 6, the third transistor M3 is provided, and in the light emitting stage when the first node N1 controls the driving transistor Tm to generate the driving current, the main stable control terminal Z is controlled to provide the inactive level signal to control the third transistor M3 to turn off, so that the third transistor M3 drains toward the first node N1 in the off state to compensate the high potential of the intermediate node N4 and the high potential of the intermediate node N5 to drain toward the first node N1, thereby stabilizing the potential of the first node N1, improving the flicker problem of the display image, and enhancing the display effect.

Optionally, in the embodiment of fig. 6, the main stability control terminal Z may multiplex control ports in the pixel circuit, so as to reduce the number of ports of the pixel circuit and simplify a control manner of the pixel circuit. The potential stabilization signal terminal W may multiplex signal ports in the pixel circuit to reduce the number of signal lines provided in the display panel, thereby simplifying the wiring scheme. In another embodiment, the main stable control terminal Z may be connected to a driving chip of the display panel, and the driving chip provides a signal to the main stable control terminal Z, specifically, the driving chip provides an inactive level signal to the main stable control terminal Z during the light emitting period to control the third transistor M3 to turn off. In another embodiment, the inactive level signal provided by the driver chip to the main stable control terminal Z is a gradually changing voltage signal to control the turn-off degree of the third transistor M3 to gradually increase, so as to ensure that the leakage current from the third transistor M3 to the first node N1 is gradually reduced to avoid the transient compensation of the potential stabilization module 10 to the potential of the first node N1.

Specifically, fig. 7 is a schematic structural diagram of another pixel circuit in the display panel according to the embodiment of the present invention. As shown in fig. 7, the first scan signal terminal S1 is multiplexed as a main stable control terminal. That is, the control terminal of the third transistor M3 is electrically connected to the first scan signal terminal S1. In a driving period of the pixel circuit, the first scan signal terminal S1 provides an active level signal in a node reset phase to control resetting of the first node N1; the first scan signal terminal S1 provides a non-active level signal in both the subsequent data writing phase and the subsequent light emitting phase. The first scan signal terminal S1 is set to be multiplexed as a main stable control terminal, so that it can be ensured that the first scan signal terminal S1 provides a non-active level signal to control the third transistor M3 to turn off during the light emitting period, thereby realizing the leakage of the third transistor M3 to the first node N1 in the off state, so as to compensate the high potential of the intermediate node N4 and the leakage of the high potential of the intermediate node N5 to the first node N1, thereby stabilizing the potential of the first node N1. Meanwhile, through multiplexing of the first scanning signal end, control ports of the pixel circuit can be reduced, the number of control lines in the display panel is further reduced, and a circuit wiring mode in the display panel is simplified.

Further, as shown in fig. 7, the reset voltage terminal Ref is multiplexed as a potential stabilization signal terminal, that is, the input terminal of the third transistor M3 is electrically connected to the reset voltage terminal Ref. When the driving transistor Tm is a p-type transistor, the reset voltage terminal Ref provides a low level signal to reset the first node N1. The reset voltage terminal Ref is multiplexed as a potential stabilizing signal terminal, so that the third transistor M3 can be ensured to compensate the potential of the first node N1 by low-potential leakage when the third transistor M3 is controlled to be in an off state in a light emitting stage. Meanwhile, the input ports of the pixel circuits can be reduced by multiplexing the reset voltage ends, so that the number of signals in the display panel is reduced, and the circuit wiring mode in the display panel is further simplified.

Further, in an embodiment, fig. 8 is a schematic diagram of another alternative implementation of the pixel circuit in the display panel according to the embodiment of the present invention, and fig. 9 is a timing diagram of the pixel circuit according to the embodiment of fig. 8. As shown in fig. 8, the Data writing module 20 includes a Data writing transistor T3, a control terminal of the Data writing transistor T3 is electrically connected to the second scan signal terminal S2, a first terminal of the Data writing transistor T3 is electrically connected to the Data signal terminal Data, and a second terminal of the Data writing transistor T3 is connected to the second node N2. The light emitting element reset module 40 includes an element reset transistor T4, a control terminal of the element reset transistor T4 is electrically connected to the first scan signal terminal S1, a first terminal of the element reset transistor T4 is electrically connected to a reset voltage terminal Ref, and a second terminal of the element reset transistor T4 is electrically connected to the light emitting element OL. The lighting control module 30 includes a first control transistor T5 and a second control transistor T6, wherein control terminals of the first control transistor T5 and the second control transistor T6 are electrically connected to a lighting control terminal E, a first terminal of the first control transistor T5 is electrically connected to a power voltage terminal PVDD, a first terminal of the first control transistor T5 is electrically connected to a second node N2, a first terminal of the second control transistor T6 is electrically connected to a third node N3, and a second terminal of the second control transistor T6 is electrically connected to a light emitting element OL. The pixel circuit further includes a storage capacitor C, a first plate of the storage capacitor C is electrically connected to the power supply voltage terminal PVDD, and a second plate of the storage capacitor C is electrically connected to the first node N1.

As illustrated in the timing chart in fig. 9, the driving period of the pixel circuit includes a node reset phase t1, a data write phase t2, and a light emission phase t 3.

In the node reset period T1, the first scan signal terminal S1 provides an active level signal, the reset transistor T1 is turned on, and the reset signal of the reset voltage terminal Ref is provided to the first node N1 to reset the first node N1; at the same time, the element reset transistor T4 is turned on, and a reset signal of the reset voltage terminal Ref is supplied to the light emitting element OL to reset the light emitting element OL, specifically, the anode of the light emitting element OL in one embodiment.

In the data writing phase T2, the second scan signal terminal S2 provides an active level signal to control the data writing transistor T3 and the compensating transistor T2 to be turned on, while the driving transistor Tm turns on the second node N2 and the third node N3 under the control of the first node N1, in which a data signal is written to the first node N1.

In the light-emitting period T3, the light-emitting control terminal E provides an active level signal, the first control transistor T5 is turned on, the signal of the power voltage terminal PVDD is provided to the second node N2, the driving transistor Tm generates a driving current under the control of the potential of the first node N1, the second control transistor T6 is turned on, and the potential of the third node N3 is provided to the light-emitting element OL, so as to control the light-emitting element OL to emit light.

As can be understood from the above description of the embodiment of fig. 1 and 2, when the reset transistor T1 and the compensation transistor T2 are dual-gate transistors, the potential of the intermediate node N4 of the reset transistor T1 is pulled high when the voltage signal of the first scan signal terminal S1 transits from the active level signal to the inactive level signal. When the voltage signal at the second scan signal terminal S2 changes from the active level signal to the inactive level signal, the potential of the intermediate node N5 of the compensation transistor T2 is pulled high. The high potential of the node N4 and the high potential of the node N5 leak to the first node N1 at the same time during the light-emitting period t 3.

As can be seen from the timing diagram of fig. 9, in the lighting period t3, the first potential stabilizing control terminal C1 provides a high-level inactive level signal to control the first transistor M1 to turn off, the main stabilizing control terminal Z provides a low-level active level signal to control the second transistor M2 to turn on, and the potential stabilizing signal terminal W provides a low-level signal at the same time, so that the potential stabilizing signal terminal W provides a low-level signal to the node N6 through the leakage current of the first transistor M1 in the off state, the node N6 is at a low potential, and the low potential of the node N6 leaks to the first node N1, thereby compensating the high potential of the intermediate node N4 and the leakage current of the high potential of the intermediate node N5 to the first node N1, reducing the change of the first node potential, stabilizing the potential of the first node N1, improving the flicker problem of the display screen, and enhancing the display effect.

It should be noted that the structures of the data writing module 20, the light-emitting control module 30, the light-emitting element resetting module 40 and the compensation module 50 in the embodiment of fig. 8 can be applied to the embodiments of fig. 1 to 7. The operation timing of the pixel circuit can also be understood with reference to the description of the embodiment of fig. 9, and is not described herein again.

In addition, the embodiments of fig. 3 to 8 are illustrated in which the reset transistor T1 and the compensation transistor T2 in the pixel circuit are dual-gate transistors, and the embodiments of fig. 3 to 8 are also applicable to the embodiment in which the reset transistor T1 is a dual-gate transistor and the compensation transistor T2 is a single-gate transistor; similarly, the embodiments of fig. 3 to 8 are also applicable to the embodiment in which the reset transistor T1 is a single-gate transistor and the compensation transistor T2 is an upper-gate transistor.

In addition, the transistors in the pixel circuits in the above embodiments are all illustrated as p-type structures, but the transistors in the embodiments of the present invention may also be n-type.

As can be seen from the above description of the embodiments, when the dual-gate transistor is a p-type transistor, the signal at the control terminal of the dual-gate transistor jumps from an active level signal to an inactive level signal, the potential of the middle node of the dual-gate transistor is pulled high, and during the light emitting period, the middle node leaks to the first node, so that the potential of the first node is pulled high. In the embodiment of the invention, the potential stabilizing module is arranged, the input end of the potential stabilizing module is connected with a low-potential signal end, namely, the potential stabilizing signal end provides a low-potential signal, and the low-potential signal end leaks to the first node in the light-emitting stage so as to supplement the leakage of the middle node of the double-gate transistor to the first node, reduce the potential change of the first node and stabilize the potential of the first node.

Correspondingly, when the double-gate transistor is an n-type transistor, a signal of a control end of the double-gate transistor jumps from an effective level signal to a non-effective level signal, the potential of an intermediate node of the double-gate transistor is pulled low, and in a light-emitting stage, the intermediate node leaks to the first node, so that the potential of the first node is pulled low. In the embodiment of the invention, the potential stabilizing module is arranged, the input end of the potential stabilizing module is connected with a high-potential signal end, namely the potential stabilizing signal end provides a high-potential signal, and the high-potential signal end leaks to the first node through the high level of the potential stabilizing signal end in the light-emitting stage so as to supplement the leakage of the middle node of the double-gate transistor to the first node, reduce the potential change of the first node and stabilize the potential of the first node.

Further, an embodiment of the present invention further provides a display module, and fig. 10 is a schematic view of the display module provided in the embodiment of the present invention, as shown in fig. 10, the display module includes a display panel 100 and a driving chip 200, and the driving chip 200 is electrically connected to the display panel 100. The display panel 100 is the display panel in any of the above embodiments, the display panel 100 includes a plurality of light emitting elements OL and a plurality of pixel circuits 101, and the pixel circuits 101 are electrically connected to the light emitting elements OL. The structure of the pixel circuit 101 can be understood by referring to the above embodiments, and will not be described herein.

The driving chip 200 is configured to drive the display panel 100 to operate in a first display stage and a second display stage, where a refresh rate of the display panel in the first display stage is smaller than a refresh rate of the display panel in the second display stage; wherein the content of the first and second substances,

the voltage stabilizing module 10 is configured to compensate for the leakage of the dual-gate transistor after the voltage signal at the control terminal of the dual-gate transistor jumps from the active level signal to the inactive level signal at least during the first display phase of the display panel 100, so as to stabilize the voltage level of the first node N1.

Specifically, the first display stage is a low-frequency working stage of the display panel, and the second display stage is a high-frequency working stage of the display panel. The refresh rate of the display panel is 15Hz, 30Hz, 60Hz, 120Hz, etc., and it is generally considered that the refresh rate is a low frequency at 60Hz or less and the refresh rate is a high frequency at 60Hz or more. When the display panel 100 operates in the first display stage, since the refresh rate is low, the time for maintaining the potential of the first node N1 is relatively long in one frame of display, and the influence of the continuous leakage of the intermediate potential of the dual-gate transistor on the potential of the first node N1 is more significant in the light-emitting stage. In the embodiment of the invention, at least when the display panel works in the low-frequency stage, the leakage current of the double-gate transistor of the potential stabilizing module 10 is controlled to compensate, and the change of the potential of the first node N1 is reduced, so as to stabilize the potential of the first node N1. Therefore, the problem of flicker of the display picture is improved, and the display effect is improved.

Specifically, as illustrated in fig. 4 to 6, the potential stabilizing module 10 includes a main stabilizing control terminal Z, wherein the main stabilizing control terminal Z is electrically connected to the driving chip 200. The driving chip 200 is used for, when the display panel 100 operates in the first display stage: the main stable control signal is provided to the main stable control terminal Z, so that the potential stabilizing module 10 compensates for the leakage current of the dual-gate transistor after the voltage signal of the control terminal of the dual-gate transistor jumps from the active level signal to the inactive level signal.

In this embodiment, the main stable control terminal Z is electrically connected to the driving chip 200, and the driving chip 200 provides a signal to the main stable control terminal Z during the operation of the pixel circuit. The main stable control terminals Z of all the pixel circuits in the display panel are provided with uniform signals by the driving chip 200, so that the overall control mode of the display panel can be simplified.

In the embodiment corresponding to fig. 4 and 5, when the display panel operates in the low frequency stage, the driving chip 200 provides a main stable control signal to the main stable control terminal Z, wherein the main stable control signal is an active level signal, and the main stable control signal controls the second transistor M2 to be in the on state. In the light emitting period, the first transistor M1 is controlled to be in an off state by the first potential stabilizing control terminal C1, a small voltage signal is provided to the N6 node by the drain current of the first transistor M1, the N6 node is at a low potential, and the drain current flows to the first node N1 by the low potential of the node N6, so that the drain current from the middle node of the dual-gate transistor (the reset transistor T1 and the compensation transistor T2 in fig. 4 and 5) to the first node N1 can be compensated, and the change of the potential of the first node N1 is reduced, so as to stabilize the potential of the first node N1.

In the embodiment shown in fig. 6, when the display panel operates in the low frequency stage, the driving chip 200 provides a main stable control signal to the main stable control terminal Z, wherein the main stable control signal is an inactive level signal, and the main stable control signal controls the third transistor M3 to be in the off state. In the light emitting stage, the leakage of the third transistor M3 to the first node N1 in the off state is compensated for by the leakage of the intermediate node of the dual gate transistor (the reset transistor T1 and the compensation transistor T2 in fig. 6) to the first node N1, and the change of the potential of the first node N1 is reduced to stabilize the potential of the first node N1.

Specifically, fig. 11 is a schematic diagram of another optional implementation manner of the display module according to the embodiment of the invention, as shown in fig. 11, the display panel 100 further includes a driving circuit 102, the driving circuit 102 includes a plurality of shift register units VSR, and it is shown that two groups of driving circuits 102 are respectively disposed on two sides of the display area AA. In another embodiment, the driving circuit 102 may be disposed only on one side of the display area AA. The driving circuit 102 is used for providing scanning signals to scanning lines in the display panel. In one pixel circuit, the first scanning signal terminal S1, the second scanning signal terminal S2, and the light emission control terminal E are connected to different scanning lines, respectively. The shift register unit VSR may be any structure in the prior art, and the present invention is not described in detail herein.

As illustrated in the embodiments described above with reference to fig. 4 and 5, the potential stabilization module 10 includes a first transistor M1 and a second transistor M2; the control terminal of the first transistor M1 is electrically connected to the first potential stabilization control terminal C1, the input terminal of the first transistor M1 is electrically connected to the input terminal of the potential stabilization module 10, and the output terminal of the first transistor M1 is electrically connected to the input terminal of the second transistor M2; the control end of the second transistor M2 is electrically connected to the main stable control end Z, and the output end of the second transistor M2 is electrically connected to the output end of the potential stabilizing module 10; the first potential stable control terminal C1 is electrically connected to an output terminal of a shift register unit VSR; the first potential stabilization control terminal C1 is electrically connected to one scan line.

In this embodiment, when the driving chip 200 drives the display panel to operate in the first display stage: the driving chip 200 provides an active level signal to the main stable control terminal Z to control the second transistor M2 to turn on; the driving chip 200 further provides a control signal to the driving circuit 102 to control the plurality of shift register units VSR to operate, wherein the control signal for controlling the plurality of shift register units VSR includes a start signal, a clock signal, and a constant level signal. By controlling the operation of the shift register units VSR, scan signals can be sequentially supplied to scan lines in the display panel. Accordingly, the shift register unit VSR to which the first potential stabilization control terminal C1 is connected can also supply the scan signal thereto. Wherein, the scanning signal comprises a continuous low level signal and a continuous high level signal. Through the coordination of the time sequence of the scanning signal output by the shift register unit VSR and the working process of the pixel circuit, the shift register unit VSR can be controlled to provide an inactive level signal to the first potential stable control end C1 to control the first transistor M1 to turn off after the voltage signal of the control end of the double-gate transistor jumps from an active level signal to an inactive level signal.

In this embodiment, the control terminal of the first transistor M1 in the level stabilizing module 10 is connected to the shift register unit, and the control terminal of the first transistor M1 is connected to the first level stabilizing control terminal C1. Optionally, the first level stabilization control terminal C1 and the first scan signal terminal S1 are connected to the same shift register unit, which is equivalent to multiplexing the first scan signal terminal S1 as the first level stabilization control terminal C1. The control mode of the potential stabilizing module can be simplified. Meanwhile, control ports of the pixel circuit can be reduced, the number of control lines in the display panel is reduced, and the circuit wiring mode in the display panel is simplified.

Further, fig. 12 is a timing diagram of signals provided by a main stable control terminal in the display module according to the embodiment of the present invention. As shown in fig. 12, in the display module according to the embodiment of the present invention, the driving chip 200 is configured to, when the display panel 100 operates in the first display phase P1: and continuously providing an active level signal to the main stable control terminal Z. The transistors in fig. 4 and 5 are illustrated as P-type transistors, and the main stable control terminal Z continuously provides a low signal to control the second transistor M2 to be turned on during the first display period P1 in fig. 12. The second transistor M2 is turned on to realize the leakage of the potential stabilizing module 10 to the first node N1 during the light emitting period, so as to compensate the leakage of the intermediate node of the double gate transistor to the first node N1, thereby reducing the variation of the potential of the first node N1. The driving chip 200 is further configured to, when the display panel operates in the second display phase P2: the inactive level signal is continuously provided to the main stable control terminal Z to control the second transistor M2 to turn off. When the display panel works in a high-frequency stage, the time for maintaining the potential of the first node N1 is relatively short in one frame of image display, and the continuous leakage of the intermediate potential of the double-gate transistor has little influence on the potential of the first node N1 in a light-emitting stage, so that the influence on the image display effect is not easy to be perceived by human eyes. In this embodiment, the driving chip 200 provides a signal to the main stable control terminal Z, so that an active level signal can be provided to the main stable control terminal Z in a low frequency operation stage according to a requirement, so as to stabilize the potential of the first node in a light emitting stage.

In another embodiment, as illustrated in fig. 6 and 7, the voltage stabilization module 10 includes a third transistor M3, a control terminal of the third transistor M3 is electrically connected to the main stabilization control terminal Z, an input terminal of the third transistor M3 is electrically connected to the input terminal of the voltage stabilization module 10, and an output terminal of the third transistor M3 is electrically connected to the output terminal of the voltage stabilization module 10. In this embodiment, when the driving chip 200 drives the display panel to operate in the first display stage: the driving chip 200 provides an inactive level signal to the main stable control terminal Z to control the third transistor M3 to turn off. The leakage of the intermediate node of the dual gate transistor to the first node N1 is compensated by the leakage of the third transistor M3 to the first node N1 in the off state during the light emitting period, and the variation of the potential of the first node N1 is reduced to stabilize the potential of the first node N1.

Further, fig. 13 is a schematic view of an optional implementation manner of the display module according to the embodiment of the present invention, and as shown in fig. 13, the display module further includes an ambient light detection module 300, the ambient light detection module 300 is electrically connected to the driving chip 200, and the ambient light detection module 300 is configured to detect an intensity of ambient light and send a detection result of the intensity of the ambient light to the driving chip 200. Specifically, the ambient light detection module 300 includes a photosensitive element and a processing unit, wherein the photosensitive element is configured to receive the irradiation of ambient light, convert an optical signal into an electrical signal, and send the electrical signal to the processing unit; the processing unit is used for analyzing and calculating the electric signals to obtain an ambient light intensity detection result. The driving chip 200 may further adjust the display brightness of the display panel according to the ambient light intensity detection result. In the embodiment of the present invention, the specific arrangement position of the photosensitive element of the ambient light detection module 300 is not limited. In this embodiment, when the display panel 100 operates in the first display stage: the driving chip 200 provides a main stability control signal to the main stability control terminal Z according to the ambient light intensity detection result. Wherein, corresponding to the embodiments of fig. 4 and 5, the structure of the potential stabilizing module is provided, and the main stabilizing control signal is an active level signal; corresponding to the structure of the voltage stabilizing module in the embodiment of fig. 6, the main stabilizing control signal is a non-active level signal.

The leakage current of the transistor is greatly influenced by the irradiation of the ambient light, and the stronger the ambient light intensity is, the larger the leakage current of the transistor is. When the display panel operates in a low-frequency stage and the ambient light intensity is high, in a light-emitting stage, the leakage current from the middle node of the double-gate transistor to the first node is increased remarkably, the influence on the potential of the first node N1 is more obvious, and the display flicker problem is more serious. In the embodiment of the invention, the driving chip provides the main stability control signal to the main stability control end according to the detection result of the ambient light intensity, so that the flexibility and the accuracy of the first node potential compensation can be improved. For example, in some embodiments, the intensity of the ambient light is set to different levels, and the voltage of the corresponding main stability control signal is different when the different levels are met, so as to implement different compensation values for compensating the first node.

Specifically, the ambient light intensity detection result includes a first detection result and a second detection result, and the ambient light intensity value corresponding to the first detection result is greater than the ambient light intensity value corresponding to the second detection result; the driving chip 200 provides a first main stability control signal to the main stability control terminal Z according to the first detection result; the driving chip 200 provides a second main stability control signal to the main stability control terminal Z according to the second detection result; the compensation value of the potential stabilizing module 10 for the leakage current of the double-gate transistor under the control of the first main stabilizing control signal is larger than the compensation value of the potential stabilizing module 10 for the leakage current of the double-gate transistor under the control of the second main stabilizing control signal. In this embodiment, different main stable control signals are provided to the stable control terminal Z according to different controls of the ambient light intensity, so as to realize different compensation values for the leakage current of the dual-gate transistor under different ambient light intensity irradiation. The larger the ambient light intensity is, the larger the compensation value for controlling the leakage current of the double-gate transistor is; the smaller the ambient light intensity, the smaller the compensation value for controlling the drain current of the double gate transistor. According to the difference of the intensity of the ambient light, compensation of different degrees is carried out, and more accurate compensation can be carried out on the potential change of the first node.

In this embodiment, when the ambient light intensity is large, a first main stability control signal is provided to the main stability control terminal Z; when the ambient light intensity is small, a second main stabilization control signal is provided to the main stabilization control terminal Z. Specifically, corresponding to the structure of the potential stabilizing module 10 in the embodiments of fig. 4 and 5, the first main stabilizing control signal and the second main stabilizing control signal are both active level signals, and the turn-on degree of the second transistor M2 under the control of the first main stabilizing control signal is greater than the turn-on degree of the second transistor M2 under the control of the second main stabilizing control signal, so as to ensure that the leakage current of the node N6 to the first node N1 when the ambient light intensity is greater than the leakage current of the node N1 when the ambient light intensity is smaller, thereby implementing that the potential stabilizing module 10 performs compensation to the first node N1 in different degrees according to different intensities of ambient light. Specifically, corresponding to the structure of the potential stabilizing module 10 in the embodiment of fig. 6, the first main stabilizing control signal and the second main stabilizing control signal are both inactive level signals, and the turn-off degree of the third transistor M3 under the control of the first main stabilizing control signal is smaller than the turn-off degree thereof under the control of the second main stabilizing control signal, so as to ensure that the leakage current of the third transistor M3 to the first node N1 when the ambient light intensity is higher is greater than the leakage current thereof to the first node N1 when the ambient light intensity is lower, thereby implementing that the potential stabilizing module 10 performs compensation to the first node N1 to different degrees according to different intensities of ambient light.

Further, the driving chip 200 provides a main stable control signal to the main stable control terminal Z according to the ambient light intensity detection result, which includes: obtaining a light intensity detection value according to an ambient light intensity detection result; when the light intensity detection value is greater than the light intensity preset value, the driving chip 200 provides a main stability control signal to the main stability control terminal Z. The voltage stabilizing module 10 in the embodiments of fig. 4 and 5 can be applied to this driving method, when the display panel operates at the low frequency stage and the ambient light intensity is large, the driving chip 200 provides the main stabilizing control signal to the main stabilizing control terminal Z to control the second transistor M2 to turn on, so that when the pixel circuit operates at the light emitting stage, the voltage stabilizing module 10 can compensate the leakage current from the dual-gate transistor to the first node N1, so as to solve the problem of serious flicker of the image when the display panel operates at the low frequency stage and the ambient light intensity is large.

For the potential stabilizing module 10 in the embodiment of fig. 6, the potential stabilizing module 10 only includes the third transistor M3, so as to avoid that the third transistor M3 is turned on and has a large influence on the potential of the first node N1, the driving chip 200 needs to continuously provide the main stabilizing control signal to the main stabilizing control terminal Z during the driving period of the pixel circuit operation, where the main stabilizing control signal is an inactive level signal, that is, the third transistor M3 needs to be continuously controlled to be turned off during the driving period of the pixel circuit operation.

In some embodiments, the driving chip 200 provides a main stable control signal to the main stable control terminal Z according to the detection result of the ambient light intensity, including: in one frame of image display, a main stabilization control signal with gradually changing voltage is provided to the main stabilization control terminal Z according to the ambient light intensity detection result, so as to control the compensation degree of the potential stabilization module 10 for the leakage current of the dual-gate transistor to gradually decrease. As explained with the pixel circuit structure in the embodiment of fig. 4, the potential of the intermediate node N4 is higher at the initial time after the signal of the first scan signal terminal S1 jumps from the active level signal to the inactive level signal, and as the dual-gate transistor (the reset transistor T1) continues to drain to the first node N1, the potential of the intermediate node N4 decreases, and the speed of the corresponding dual-gate transistor leaking to the first node N1 decreases. The main stability control signal with gradually changing voltage is provided to the main stability control terminal Z, so that the compensation degree of the potential stabilizing module 10 for the leakage current of the double-gate transistor is controlled to gradually decrease, and the potential of the first node is prevented from being overcompensated.

Specifically, in the application of the potential stabilizing module illustrated in the embodiments of fig. 4 and 5, in one frame of image display, the driving chip 200 provides the main stabilizing control signal with gradually increasing voltage to the main stabilizing control terminal Z according to the ambient light intensity detection result, and controls the turning-on degree of the second transistor M2 to gradually decrease. Accordingly, for the potential stabilizing module in the embodiment of fig. 6, in one frame of image display, the driving chip 200 provides the main stabilizing control signal with the gradually decreasing voltage to the main stabilizing control terminal Z according to the ambient light intensity detection result, so as to control the turning-off degree of the second transistor M2 to gradually increase.

Specifically, when the driving chip drives the display panel to work in the first display stage, the display process of a frame of picture comprises a data writing frame and at least one holding frame; wherein, the display process of a picture can comprise one or more holding frames, and the time of one holding frame is the same as the time of one data writing frame. Wherein, only in the data writing frame, the pixel circuit controls to write the data voltage signal to the first node; the driving transistor supplies a driving current to the light emitting element under control of the first node potential in a data writing frame and a holding frame. In one frame of image display, a main stable control signal with gradually changing voltage is provided to the main stable control terminal Z according to the ambient light detection result to control the compensation degree of the potential stabilizing module 10 to the leakage current of the dual-gate transistor to gradually decrease, specifically comprising: providing an initial main stable control signal to a main stable control end in a data writing frame; and providing a secondary main stable control signal to the main stable control end in the maintaining frame.

Fig. 14 is a driving timing diagram of a display module according to an embodiment of the invention. As shown in fig. 14, a timing diagram of the display panel during a low frequency operation phase is provided. Taking the refresh rate of 15Hz as an example, the display time of one frame is 4 times of the display time of one frame when the refresh rate is 60 Hz. In the low-frequency operation stage, the process of driving the display panel to display one frame of picture is divided into four sub-frames, namely Z1, Z2, Z3 and Z4. The first sub-frame Z1 is a data write frame, the second sub-frame Z2, the third sub-frame Z3 and the fourth sub-frame Z4 are all holding frames, and the working phase of the pixel circuit in the data write frame includes a node reset phase t1, a data write phase t2 and a light-emitting phase t 3. While keeping the frame free of data writing. For the working process of the pixel circuit in the data writing frame, reference may be made to the description in the embodiment of fig. 9, which is not repeated herein. In the second sub-frame Z2, the third sub-frame Z3 and the fourth sub-frame Z4, the timing of the signal of the light-emitting control terminal E is the same as that of the first sub-frame Z1, and the pixel circuit can be driven to perform the light-emitting period t 3. The signal timings of the second scan signal terminal S2 and the first scan signal terminal S1 are adjusted in the non-emission period of the sustain frame, and the second scan signal terminal S2 and the first scan signal terminal S1 are controlled to provide a non-active level signal in the sustain frame, so that the data writing period and the node resetting period are not performed in the sustain frame to avoid the potential of the first node N1 from being changed in the sustain frame.

In the second sub-frame Z2, the third sub-frame Z3 and the fourth sub-frame Z4, if there is no data writing process, when the display panel operates in the first stage with a low refresh rate, in one frame of picture display, the potential of the first node N1 in the pixel circuit is maintained for a relatively long time, and at the initial time after the signal of the control end of the double-gate transistor jumps from the active level signal to the inactive level signal, the potential of the middle node of the double-gate transistor is high, and as the double-gate transistor continuously leaks to the first node N1, the potential of the middle node will drop, and the leakage rate of the corresponding double-gate transistor to the first node N1 will drop.

The signal timing of the main settling control terminal Z illustrated in fig. 14 is applicable to the pixel circuit in the embodiment of fig. 5. As illustrated in fig. 14, in one-frame screen display: in the data writing frame (i.e. the first sub-frame Z1), the primary stability control terminal Z transmits an initial primary stability control signal; in the hold frame, the primary settling control terminal Z transmits a secondary primary settling control signal. It is shown that the secondary main stabilizing control signal is transmitted from the main stabilizing control terminal Z at the second holding frame, i.e. at the second sub-frame Z2, and it can be seen that the voltage value of the secondary main stabilizing control signal is greater than that of the initial main stabilizing control signal, and the turn-on degree of the second transistor M2 under the control of the secondary main stabilizing control signal becomes smaller. The compensation value of the potential stabilizing module 10 for the leakage current of the double-gate transistor under the control of the initial main stabilizing control signal is larger than the compensation value of the potential stabilizing module 10 for the leakage current of the double-gate transistor under the control of the secondary main stabilizing control signal. The compensation degree of the potential stabilizing module 10 for the leakage current of the dual-gate transistor is controlled to be gradually reduced, so as to avoid over-compensation for the potential of the first node.

In a specific embodiment, when the voltage of the first node N1 is 2V and the illumination is 5000lux, the voltage value for providing the initial main stable control signal to the main stable control terminal Z is set to-5V, and the potentials of the intermediate node N4 and the intermediate node N5 are higher at the starting time after the signal jump of the control terminal of the double-gate transistor, so that the leakage current speed is higher; at the beginning of the second sub-frame Z2, the first node N1 voltage rises to 2.1V due to the leakage to the first node N1, and the leakage speed of the double gate transistor to the first node N1 decreases due to the decrease of the voltages of the intermediate node N4 and the intermediate node N5; at the beginning of the third sub-frame Z3, the potential of the first node N1 may drop to 1.8V, and at this time, the signal of the main stability control terminal Z (i.e., the secondary main stability control signal is provided to the main stability control terminal Z) is pulled up to 3V, and due to the pulling up of the signal of the main stability control terminal Z, the parasitic capacitance of the transistor in the pixel circuit pulls up the potentials of the node N6 and the first node N1. For example, the first node N1 is pulled high to 1.9V and node N6 is pulled high to 2.5V. Thereafter, intermediate node N4 and intermediate node N5, as well as node N6, leak into N1 at the same time, pulling N1 high again. In general, the first node N1 will remain around 2V.

Two waveforms of the main settling control terminal Z providing the main settling control signal are illustrated in fig. 14, and in one embodiment, the driving chip 200 provides the secondary main settling control signal to the main settling control terminal Z as a constant voltage signal during the holding frame. In another embodiment, the driving chip 200 provides the secondary main stability control signal to the main stability control terminal Z as a gradually changing voltage signal during the sustain frame.

In addition, the timing chart of fig. 14 shows that, at the beginning of the second holding frame (third sub-frame Z3), the driver chip 200 provides the secondary main stabilization control signal to the main stabilization control terminal Z. In another embodiment, the driver chip 200 provides the secondary main stabilization control signal to the main stabilization control terminal Z at the beginning of the first sustain frame (the second sub-frame Z2). In another embodiment, the driver chip 200 provides the secondary main stabilization control signal to the main stabilization control terminal Z at the beginning of the third sustain frame (fourth sub-frame Z4). The specific setting mode can be set according to the requirement of compensating the potential of the first node N1.

Further, an embodiment of the present invention further provides a driving method for a display panel, which can be applied to any one of the display panels provided in the embodiments of the present invention. The embodiments of the driving method of the display panel, and the descriptions of the above embodiments of the display panel and the display module can be understood by reference.

Fig. 15 is a flowchart of a driving method of a display panel according to an embodiment of the present invention, and as shown in fig. 15, the driving method includes:

the control display panel 100 operates in a first display phase, including: the control potential stabilizing module 10 compensates the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from the active level signal to the inactive level signal, so as to stabilize the potential of the first node N1;

and controlling the display panel 100 to work in a second display phase, wherein the refresh rate of the display panel 100 in the first display phase is smaller than that in the second display phase.

When the display panel 100 operates in the first display stage, since the refresh rate is low, the time for maintaining the potential of the first node N1 is relatively long in one frame of display, and the influence of the continuous leakage of the intermediate potential of the dual-gate transistor on the potential of the first node N1 is more significant in the light-emitting stage. In the embodiment of the invention, at least when the display panel works in the low-frequency stage, the leakage current of the double-gate transistor of the potential stabilizing module 10 is controlled to compensate, and the change of the potential of the first node N1 is reduced, so as to stabilize the potential of the first node N1. Therefore, the problem of flicker of the display picture is improved, and the display effect is improved.

Specifically, the potential stabilizing module includes a main stabilizing control terminal, which can refer to the schematic diagrams in the embodiments of fig. 4 to 8. The driving method provided by the embodiment of the invention comprises the following steps: and providing a main stable control signal to the main stable control end so that the potential stabilizing module compensates the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from an effective level signal to a non-effective level signal.

In the embodiment corresponding to fig. 4 and 5, when the display panel operates in the first display stage with a low refresh rate, the main stable control signal is provided to the main stable control terminal Z, wherein the main stable control signal is an active level signal, and the main stable control signal controls the second transistor M2 to be in an on state. In the light emitting period, the first transistor M1 is controlled to be in an off state by the first potential stabilizing control terminal C1, a small voltage signal is provided to the N6 node by the drain current of the first transistor M1, the N6 node is at a low potential, and the drain current flows to the first node N1 by the low potential of the node N6, so that the drain current from the middle node of the dual-gate transistor (the reset transistor T1 and the compensation transistor T2 in fig. 4 and 5) to the first node N1 can be compensated, and the change of the potential of the first node N1 is reduced, so as to stabilize the potential of the first node N1.

In the embodiment shown in fig. 6, when the display panel operates in the first display stage with a low refresh rate, the main stabilization control signal is provided to the main stabilization control terminal Z, wherein the main stabilization control signal is an inactive level signal, and the main stabilization control signal controls the third transistor M3 to be in an off state. In the light emitting stage, the leakage of the third transistor M3 to the first node N1 in the off state is compensated for by the leakage of the intermediate node of the dual gate transistor (the reset transistor T1 and the compensation transistor T2 in fig. 6) to the first node N1, and the change of the potential of the first node N1 is reduced to stabilize the potential of the first node N1.

Further, fig. 16 is another flowchart of a driving method of a display panel according to an embodiment of the present invention. As shown in fig. 16, the control display panel operates in a first display stage, including: and providing a main stable control signal to a main stable control end Z according to the ambient light intensity detection result, so that the potential stabilizing module compensates the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from an effective level signal to a non-effective level signal. The leakage current of the transistor is greatly influenced by the irradiation of the ambient light, and the stronger the ambient light intensity is, the larger the leakage current of the transistor is. When the display panel operates in a low-frequency stage and the ambient light intensity is high, in a light-emitting stage, the leakage current from the middle node of the double-gate transistor to the first node is increased remarkably, the influence on the potential of the first node N1 is more obvious, and the display flicker problem is more serious. In the embodiment of the invention, the driving chip provides the main stability control signal to the main stability control end according to the detection result of the ambient light intensity, so that the flexibility and the accuracy of the first node potential compensation can be improved.

In one embodiment, the ambient light intensity detection result includes a first detection result and a second detection result, and the ambient light intensity value corresponding to the first detection result is greater than the ambient light intensity value corresponding to the second detection result; providing a main stable control signal to a main stable control terminal Z according to the detection result of the ambient light intensity, comprising: providing a first main stability control signal to a main stability control terminal Z according to a first detection result; providing a second main stability control signal to the main stability control terminal Z according to a second detection result; the compensation value of the potential stabilizing module 10 for the leakage current of the double-gate transistor under the control of the first main stabilizing control signal is larger than the compensation value of the potential stabilizing module 10 for the leakage current of the double-gate transistor under the control of the second main stabilizing control signal. In this embodiment, different main stable control signals are provided to the stable control terminal Z according to different controls of the ambient light intensity, so as to realize different compensation values for the leakage current of the dual-gate transistor under different ambient light intensity irradiation. The larger the ambient light intensity is, the larger the compensation value for controlling the leakage current of the double-gate transistor is; the smaller the ambient light intensity, the smaller the compensation value for controlling the drain current of the double gate transistor. According to the difference of the intensity of the ambient light, compensation of different degrees is carried out, and more accurate compensation can be carried out on the potential change of the first node.

In an embodiment, fig. 17 is another flowchart of a driving method of a display panel according to an embodiment of the present invention. As shown in fig. 17, the providing of the main stabilization control signal to the main stabilization control terminal according to the detection result of the ambient light intensity includes:

step S101: obtaining a light intensity detection value according to an ambient light intensity detection result;

step S102: and when the light intensity detection value is greater than the light intensity preset value, continuously providing a main stability control signal to the main stability control terminal Z.

The driving method provided by this embodiment can compensate the potential of the first node N1 through the potential stabilizing module 10 when the display panel operates at a low frequency stage and the ambient light intensity is high, so as to solve the problem of serious flicker when the display panel operates at the low frequency stage and the ambient light intensity is high.

In one embodiment, providing a main stability control signal to the main stability control terminal according to the detection result of the intensity of the ambient light includes: in one frame of image display, a main stable control signal with gradually changed voltage is provided to the main stable control end according to the detection result of the ambient light intensity so as to control the compensation degree of the potential stabilizing module to the leakage current of the double-gate transistor to be gradually reduced. In this embodiment, the main stability control signal with gradually changing voltage is provided to the main stability control terminal Z, so as to control the compensation degree of the potential stabilizing module 10 to the leakage current of the dual-gate transistor to gradually decrease, so as to avoid over-compensation to the potential of the first node.

Specifically, the driving of the display panel in the first display stage includes: the display process of one frame of picture comprises a data writing frame and at least one holding frame; wherein, only in the data writing frame, the pixel circuit controls to write the data voltage signal to the first node; in the hold frame, the driving transistor supplies a driving current to the light emitting element under control of the first node potential. Fig. 18 is another flowchart of a driving method of a display panel according to an embodiment of the invention. As shown in fig. 18, in one frame of image display, the method for providing a main stability control signal with gradually changing voltage to a main stability control terminal according to the ambient light detection result to control the degree of compensation of the potential stabilizing module for the leakage current of the dual-gate transistor to gradually decrease specifically comprises:

step S201: providing an initial main stable control signal to a main stable control end in a data writing frame;

step S202: providing a secondary main stable control signal to a main stable control end in a holding frame;

the compensation value of the potential stabilizing module for the leakage current of the double-gate transistor under the control of the initial main stabilizing control signal is larger than the compensation value of the potential stabilizing module for the leakage current of the double-gate transistor under the control of the secondary main stabilizing control signal.

For an understanding of the driving method in this embodiment, reference may be made to the description in the embodiment of fig. 14 described above. When the display panel works in the first stage of low refresh rate, no data writing process exists in a holding frame in one frame of image display, the electric potential of the first node N1 in the pixel circuit is maintained for a relatively long time, the electric potential of the middle node of the double-gate transistor is higher at the initial moment after the signal of the control end of the double-gate transistor jumps from the effective level signal to the ineffective level signal, the electric potential of the middle node is reduced along with the continuous leakage of the double-gate transistor to the first node N1, and the leakage speed of the corresponding double-gate transistor to the first node N1 is reduced. And controlling to be in a holding frame, and transmitting a secondary main stability control signal to the main stability control end, so that the compensation value of the potential stability module to the leakage current of the double-gate transistor under the control of the initial main stability control signal is larger than the compensation value of the potential stability module to the leakage current of the double-gate transistor under the control of the secondary main stability control signal, the compensation degree of the potential stability module to the leakage current of the double-gate transistor is controlled to be gradually reduced, and the potential of the first node is prevented from being excessively compensated.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel characterized by comprising a plurality of light emitting elements and a plurality of pixel circuits electrically connected to the light emitting elements;

the control end of the driving transistor is electrically connected with a first node, the input end of the driving transistor is electrically connected with a second node, the output end of the driving transistor is electrically connected with a third node, and the driving transistor is used for providing driving current for the light-emitting element under the control of the first node; the output end of the double-gate transistor is electrically connected with the first node;

the control end of the reset transistor is electrically connected with a first scanning signal end, the input end of the reset transistor is electrically connected with a reset voltage end, the output end of the reset transistor is electrically connected with the first node, and the reset transistor is used for resetting the first node under the control of the first scanning signal end;

2. The display panel according to claim 1,

the pixel circuit includes a compensation transistor;

the control end of the compensation transistor is electrically connected with the second scanning signal end, the input end of the compensation transistor is electrically connected with the third node, the output end of the compensation transistor is electrically connected with the first node, and the compensation transistor is used for performing threshold compensation on the driving transistor under the control of the second scanning signal end; wherein the content of the first and second substances,

the compensation transistor is a double-gate transistor.

3. The display panel according to claim 1, wherein the potential stabilization block comprises a first transistor and a second transistor;

the control end of the first transistor is electrically connected with a first potential stabilization control end, the input end of the first transistor is electrically connected with the input end of the potential stabilization module, and the output end of the first transistor is electrically connected with the input end of the second transistor; the control end of the second transistor is electrically connected with the main stable control end, and the output end of the second transistor is electrically connected with the output end of the potential stabilizing module.

4. The display panel according to claim 3,

the first scanning signal end is multiplexed as the first potential stable control end.

5. The display panel according to claim 1, wherein the potential stabilization module comprises a third transistor, a control terminal of the third transistor is electrically connected to a main stabilization control terminal, an input terminal of the third transistor is electrically connected to the input terminal of the potential stabilization module, and an output terminal of the third transistor is electrically connected to the output terminal of the potential stabilization module.

6. The display panel according to claim 5,

and the first scanning signal end is multiplexed as the main stable control end.

7. The display panel according to claim 3 or 5,

and the reset voltage end is multiplexed as the potential stabilizing signal end.

8. The display panel according to any one of claims 1 and 3 to 6, wherein the reset transistor is a double gate transistor.

9. The display panel according to claim 8, wherein the pixel circuit includes a compensation transistor;

the compensation transistor is the double-gate transistor.

10. The display module is characterized by comprising a display panel and a driving chip, wherein the driving chip is electrically connected with the display panel; the display panel includes a plurality of light emitting elements and a plurality of pixel circuits electrically connected to the light emitting elements;

the pixel circuit comprises a driving transistor, a reset transistor and at least one double-gate transistor; the control end of the driving transistor is electrically connected with a first node, the input end of the driving transistor is electrically connected with a second node, the output end of the driving transistor is electrically connected with a third node, and the driving transistor is used for providing driving current for the light-emitting element under the control of the first node; the output end of the double-gate transistor is electrically connected with the first node;

the pixel circuit further comprises a potential stabilizing module, wherein the input end of the potential stabilizing module is electrically connected with a potential stabilizing signal end, and the output end of the potential stabilizing module is electrically connected with the first node;

at least when the display panel works in the first display stage, the electric potential stabilizing module is used for compensating the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from an effective level signal to a non-effective level signal so as to stabilize the electric potential of the first node.

11. The display module of claim 10,

the potential stabilizing module comprises a main stabilizing control end which is electrically connected with the driving chip;

the driving chip is used for, when the display panel works in the first display stage: and providing a main stable control signal to the main stable control end so that the potential stabilizing module compensates the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from an effective level signal to a non-effective level signal.

12. The display module of claim 11,

the potential stabilizing module comprises a first transistor and a second transistor;

the control end of the first transistor is electrically connected with a first potential stabilization control end, the input end of the first transistor is electrically connected with the input end of the potential stabilization module, and the output end of the first transistor is electrically connected with the input end of the second transistor; the control end of the second transistor is electrically connected with the main stable control end, and the output end of the second transistor is electrically connected with the output end of the potential stabilizing module;

the display panel further comprises a driving circuit, the driving circuit comprises a plurality of shift register units, and the first potential stable control end is electrically connected with the output end of one shift register unit;

the providing a main stable control signal to the main stable control terminal includes: providing an active level signal to the main stable control terminal to control the second transistor to be turned on;

the driving chip is further used for, when the display panel works in the first display stage: and providing a control signal to the driving circuit to control the plurality of shift register units to work so as to control the shift register units to provide an inactive level signal to the first potential stable control end to control the first transistor to be turned off after the voltage signal of the control end of the double-gate transistor jumps from an active level signal to an inactive level signal.

13. The display module of claim 12,

the driving chip is used for, when the display panel works in a first display stage: continuously providing an active level signal to the main stable control end;

the driving chip is further used for, when the display panel works in a second display stage: and continuously providing an inactive level signal to the main stable control end so as to control the second transistor to be switched off.

14. The display module of claim 11,

the potential stabilizing module comprises a third transistor, wherein a control end of the third transistor is electrically connected with the main stabilizing control end, an input end of the third transistor is electrically connected with an input end of the potential stabilizing module, and an output end of the third transistor is electrically connected with an output end of the potential stabilizing module;

the providing a main stable control signal to the main stable control terminal includes: providing a non-active level signal to the main stabilization control terminal to control the third transistor to turn off.

15. The display module of claim 11,

the display module further comprises an ambient light detection module, the ambient light detection module is electrically connected with the driving chip and is used for detecting the intensity of ambient light and sending the detection result of the intensity of the ambient light to the driving chip;

the providing of the main stability control signal to the main stability control terminal specifically includes: and the driving chip provides a main stability control signal to the main stability control end according to the ambient light intensity detection result.

16. The display module of claim 15,

the detection result of the ambient light intensity comprises a first detection result and a second detection result, and the ambient light intensity value corresponding to the first detection result is greater than the ambient light intensity value corresponding to the second detection result;

the driving chip provides a first main stable control signal to the main stable control end according to the first detection result; the driving chip provides a second main stable control signal to the main stable control end according to the second detection result; wherein the content of the first and second substances,

the compensation value of the potential stabilizing module for the leakage current of the double-gate transistor under the control of the first main stabilizing control signal is larger than the compensation value of the potential stabilizing module for the leakage current of the double-gate transistor under the control of the second main stabilizing control signal.

17. The display module of claim 15,

the driving chip provides a main stable control signal to the main stable control end according to the ambient light intensity detection result, and the driving chip comprises:

obtaining a light intensity detection value according to the ambient light intensity detection result;

and when the light intensity detection value is greater than the light intensity preset value, the driving chip provides a main stability control signal to the main stability control end.

18. The display module of claim 11,

and in one frame of picture display, providing a main stability control signal with gradually changing voltage to the main stability control end according to the ambient light intensity detection result so as to control the compensation degree of the potential stabilization module to the leakage current of the double-gate transistor to be gradually reduced.

19. The display module of claim 18,

when the driving chip drives the display panel to work in the first display stage, the display process of a frame of picture comprises a data writing frame and at least one holding frame; wherein the pixel circuit controls writing of a data voltage signal to the first node only at the data write frame; in the holding frame, the driving transistor supplies a driving current to the light emitting element under control of the first node potential;

in the one-frame image display, a main stabilization control signal with gradually changing voltage is provided to the main stabilization control terminal according to the ambient light detection result to control the compensation degree of the potential stabilization module for the leakage current of the dual-gate transistor to gradually decrease, specifically including:

providing an initial main stable control signal to the main stable control end in the data writing frame;

providing a secondary main stable control signal to the main stable control end in the maintaining frame;

20. A driving method of a display panel including a plurality of light emitting elements and a plurality of pixel circuits electrically connected to the light emitting elements;

the pixel circuit comprises a driving transistor, a reset transistor and at least one double-gate transistor; the control end of the driving transistor is electrically connected with a first node, the input end of the driving transistor is electrically connected with a second node, the output end of the driving transistor is electrically connected with a third node, the third node is connected to the anode of the light-emitting element, and the driving transistor is used for providing driving current for the light-emitting element under the control of the first node; the output end of the double-gate transistor is electrically connected with the first node;

the pixel circuit further comprises a potential stabilizing module, wherein the input end of the potential stabilizing module is electrically connected with a potential stabilizing signal end, and the output end of the potential stabilizing module is electrically connected with the first node; characterized in that the driving method comprises:

controlling the display panel to work in a first display stage, comprising: controlling the electric potential stabilizing module to compensate the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from an effective level signal to a non-effective level signal so as to stabilize the electric potential of the first node;

21. The driving method according to claim 20,

the potential stabilizing module comprises a main stabilizing control end,

controlling the potential stabilizing module to compensate the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from an active level signal to a non-active level signal so as to stabilize the potential of the first node, comprising: and providing a main stable control signal to the main stable control end so that the potential stabilizing module compensates the leakage current of the double-gate transistor after the voltage signal of the control end of the double-gate transistor jumps from an effective level signal to a non-effective level signal.

22. The driving method according to claim 21,

the providing of the main stability control signal to the main stability control terminal specifically includes:

and providing a main stability control signal to the main stability control end according to the detection result of the ambient light intensity.

23. The driving method according to claim 22,

the providing of the main stable control signal to the main stable control terminal according to the ambient light intensity detection result includes:

providing a first main stable control signal to the main stable control end according to the first detection result; providing a second main stability control signal to the main stability control end according to the second detection result; wherein the content of the first and second substances,

24. The driving method according to claim 22,

and when the light intensity detection value is greater than the light intensity preset value, continuously providing a main stability control signal to the main stability control end.

25. The driving method according to claim 22,

26. The driving method according to claim 25,

driving the display panel to operate in the first display stage, including: the display process of one frame of picture comprises a data writing frame and at least one holding frame; wherein the pixel circuit controls writing of a data voltage signal to the first node only at the data write frame; in the holding frame, the driving transistor supplies a driving current to the light emitting element under control of the first node potential;