Pixel circuit and driving method thereof, array substrate and display panel

Abstract

The invention provides a pixel circuit, a driving method of the pixel circuit, an array substrate and a display panel, relates to the technical field of display, and improves the ghost phenomenon. The pixel circuit comprises a driving module, a first light emitting control module and a potential adjusting module. The first end of the first light-emitting control module is connected with the first end of the driving module, and the control end of the first light-emitting control module is connected with a light-emitting control signal line; the first end of the potential adjusting module is connected with a light-emitting control signal line, and the second end of the potential adjusting module is connected with the second end of the driving module. When the light-emitting control potential in the light-emitting control signal line jumps to a high level, the potential of the second end of the driving module is coupled and lifted, so that a reverse current flowing from the second end of the driving module to the first end of the driving module is generated, and the potential of the first end of the driving module is lifted; therefore, the threshold voltages of the driving modules of the pixel circuits in different light-emitting areas of the display panel tend to be consistent, and the ghosting phenomenon is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a pixel circuit and a driving method thereof, an array substrate and a display panel. Background Art

[0002] In recent years, organic light-emitting display panels have gradually become the mainstream products in the display field. Due to their advantages such as high image quality, power saving, thin body and wide range of applications, they are widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc.

[0003] However, the display screen of the current display panel has the problem of image sticking. Summary of the invention

[0004] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a pixel circuit and a driving method thereof, an array substrate and a display panel, which improve the afterimage phenomenon.

[0005] In a first aspect, an embodiment of the present application provides a pixel circuit, which includes a driving module, a first light-emitting control module and a potential adjustment module; wherein the driving module is used to drive the light-emitting device to emit light; the first end of the first light-emitting control module is connected to the first end of the driving module, and the control end of the first light-emitting control module is connected to the light-emitting control signal line; the first end of the potential adjustment module is connected to the light-emitting control signal line, and the second end of the potential adjustment module is connected to the second end of the driving module.

[0006] In combination with the first aspect, in some implementations of the first aspect, the potential regulating module includes a first capacitor, a first plate of the first capacitor is connected to a first end of the potential regulating module, and a second plate of the first capacitor is connected to a second end of the potential regulating module.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the driving module includes a first transistor, a first electrode of the first transistor is connected to a first end of the driving module, a second electrode of the first transistor is connected to a second end of the driving module, and a control electrode of the first transistor is connected to a control end of the driving module.

[0008] Preferably, the first light emitting control module includes a second transistor, a first electrode of the second transistor is connected to the first end of the first light emitting control module, a second electrode of the second transistor is connected to the second end of the first light emitting control module, and a control electrode of the second transistor is connected to the control end of the first light emitting control module.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the pixel circuit also includes a first reset module, a first end of the first reset module is connected to the control end of the driving module, a second end of the first reset module is connected to the first initialization signal line, and the control end of the first reset module is connected to the first switch signal line.

[0010] Preferably, the first reset module includes a third transistor, a first electrode of the third transistor is connected to the first end of the first reset module, a second electrode of the third transistor is connected to the second end of the first reset module, and a control electrode of the third transistor is connected to the control end of the first reset module; or

[0011] Preferably, the first reset module includes a first sub-transistor and a second sub-transistor, the first electrode of the first sub-transistor is connected to the first end of the first reset module, the second electrode of the first sub-transistor is connected to the first electrode of the second sub-transistor, the second electrode of the second sub-transistor is connected to the second end of the first reset module, and the control electrode of the first sub-transistor and the control electrode of the second sub-transistor are both connected to the control end of the first reset module.

[0012] Preferably, the pixel circuit further comprises a second reset module, a first end of the second reset module is connected to the first electrode of the light emitting device, a second end of the second reset module is connected to the second initialization signal line, and a control end of the second reset module is connected to the first switch signal line.

[0013] Preferably, the second reset module includes a fourth transistor, a first electrode of the fourth transistor is connected to the first end of the second reset module, a second electrode of the fourth transistor is connected to the second end of the second reset module, and a control electrode of the fourth transistor is connected to the control end of the second reset module.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the pixel circuit also includes a data writing module, a first end of the data writing module is connected to the data signal line, a second end of the data writing module is connected to the first end of the driving module, and a control end of the data writing module is connected to the second switch signal line.

[0015] Preferably, the data writing module includes a fifth transistor, a first electrode of the fifth transistor is connected to the first end of the data writing module, a second electrode of the fifth transistor is connected to the second end of the data writing module, and a control electrode of the fifth transistor is connected to the control end of the data writing module.

[0016] Preferably, the pixel circuit further comprises a compensation module, a first end of the compensation module is connected to the control end of the driving module, a second end of the compensation module is connected to the second end of the driving module, and the control end of the compensation module is connected to the second switch signal line.

[0017] Preferably, the compensation module includes a sixth transistor, a first electrode of the sixth transistor is connected to the first end of the compensation module, a second electrode of the sixth transistor is connected to the second end of the compensation module, and a control electrode of the sixth transistor is connected to the control end of the compensation module; or

[0018] Preferably, the compensation module includes a third sub-transistor and a fourth sub-transistor, the first electrode of the third sub-transistor is connected to the first end of the compensation module, the second electrode of the third sub-transistor is connected to the first electrode of the fourth sub-transistor, the second electrode of the fourth sub-transistor is connected to the second end of the compensation module, and the control electrode of the third sub-transistor and the control electrode of the fourth sub-transistor are both connected to the control end of the compensation module.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the pixel circuit also includes a second light-emitting control module, a first end of the second light-emitting control module is connected to the second end of the driving module, a second end of the second light-emitting control module is connected to the first electrode of the light-emitting device, and a control end of the second light-emitting control module is connected to a light-emitting control signal line.

[0020] Preferably, the second light-emitting control module includes a seventh transistor, a first electrode of the seventh transistor is connected to the first end of the second light-emitting control module, a second electrode of the seventh transistor is connected to the second end of the second light-emitting control module, and a control electrode of the seventh transistor is connected to the control end of the second light-emitting control module.

[0021] In combination with the first aspect, in some implementations of the first aspect, the pixel circuit further includes a storage module, a first end of the storage module is connected to the control end of the driving module, and a second end of the storage module is connected to the first power signal line.

[0022] Preferably, the storage module includes a second capacitor, a first electrode plate of the second capacitor is connected to a first end of the storage module, and a second electrode plate of the second capacitor is connected to a second end of the storage module.

[0023] In the second aspect, an embodiment of the present application provides a driving method for a pixel circuit, wherein the pixel circuit includes a driving module, and the pixel circuit and the light-emitting device are electrically connected, and the driving method includes: a reset phase, for resetting the control end of the driving module; a data writing phase, for writing a data voltage signal into the first end of the driving module; and a light-emitting phase, for driving the light-emitting device to emit light; wherein there is a time interval between the end time of the reset phase and the start time of the data writing phase.

[0024] In a third aspect, an embodiment of the present application provides an array substrate, the array substrate comprising a pixel circuit as provided in any of the above embodiments.

[0025] In a fourth aspect, an embodiment of the present application provides a display panel, the display panel includes a plurality of light-emitting devices arranged in an array; and an array substrate as provided in the above embodiment, the array substrate includes a plurality of pixel circuits, and the plurality of light-emitting devices and the plurality of pixel circuits are connected one-to-one.

[0026] The pixel circuit provided by the embodiment of the present application includes a driving module, a first light-emitting control module and a potential regulating module; wherein the driving module is used to drive the light-emitting device to emit light; the first end of the first light-emitting control module is connected to the first end of the driving module, and the control end of the first light-emitting control module is connected to the light-emitting control signal line; the first end of the potential regulating module is connected to the light-emitting control signal line, and the second end of the potential regulating module is connected to the second end of the driving module. When the light-emitting control potential in the light-emitting control signal line jumps to a high level, the potential of the first end of the potential regulating module jumps to a high level, and then the potential of the second end of the potential regulating module is coupled and raised, that is, the potential of the second end of the driving module is coupled and raised, and then a reverse current is generated from the second end of the driving module to the first end of the driving module, and then the potential of the first end of the driving module is raised, thereby increasing the potential difference between the control end and the first end of the driving module, which is conducive to making the threshold voltages of the driving modules of the pixel circuits in different light-emitting areas of the display panel tend to be consistent, thereby improving the afterimage phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0028] Figure 1 FIG. 1 is a schematic diagram of a circuit structure of a pixel circuit provided in an embodiment of the present application.

[0029] Figure 2 FIG. 4 is a schematic diagram of a circuit structure of a pixel circuit provided in another embodiment of the present application.

[0030] Figure 3 FIG. 4 is a schematic diagram of a circuit structure of a pixel circuit provided in another embodiment of the present application.

[0031] Figure 4 FIG. 4 is a schematic diagram of a circuit structure of a pixel circuit provided in another embodiment of the present application.

[0032] Figure 5 Shown is the use of Figure 4 The waveform simulation diagram of the node potential change during the operation of the pixel circuit is shown.

[0033] Figure 6 The related art pixel circuit and the Figure 4 A schematic diagram showing a comparison of the potential difference between the control terminal and the first terminal of the driving module of the pixel circuit shown.

[0034] Figure 7FIG. 1 is a flow chart of a driving method of a pixel circuit provided in an embodiment of the present application.

[0035] Figure 8 FIG. 1 is a driving timing diagram of a pixel circuit provided in an embodiment of the present application.

[0036] Fig. 9 FIG. 1 is a schematic diagram of the structure of an array substrate provided in one embodiment of the present application.

[0037] Fig.10 Shown is a schematic structural diagram of a display panel provided in one embodiment of the present application.

[0038] Figure numerals: pixel circuit 110; driving module 111; first light-emitting control module 112; potential adjustment module 113; first reset module 114; second reset module 115; data writing module 116; compensation module 117; second light-emitting control module 118; storage module 119; light-emitting device OLED; first transistor T1; second transistor T2; third transistor T3; fourth transistor T4; fifth transistor T5; sixth transistor T6; seventh transistor T7; first sub-transistor T3-1; second sub-transistor T3-2; third sub-transistor T6-1; fourth sub-transistor T6-2; light-emitting control signal line EM; first switch signal line S1; second switch signal line S2; first initialization signal line vref1; second initialization signal line vref2; data signal line data; first power signal line vdd; second power signal line vss; array substrate 100; display panel 10. DETAILED DESCRIPTION

[0039] In the display panel provided by the related art, the threshold voltages of the driving modules of the pixel circuits in different light-emitting areas are different, which easily leads to the problem of threshold voltage drift during operation, resulting in afterimages in the display screen and poor visual experience.

[0040] In order to solve the above technical problems, the present application provides a pixel circuit, which includes a driving module, a first light-emitting control module and a potential adjustment module; wherein the driving module is used to drive the light-emitting device to emit light; the first end of the first light-emitting control module is connected to the first end of the driving module, and the control end of the first light-emitting control module is connected to the light-emitting control signal line; the first end of the potential adjustment module is connected to the light-emitting control signal line, and the second end of the potential adjustment module is connected to the second end of the driving module. When the light-emitting control potential in the light-emitting control signal line jumps to a high level, the potential of the first end of the potential adjustment module jumps to a high level, and then the potential of the second end of the potential adjustment module is coupled and raised, that is, the potential of the second end of the driving module is coupled and raised, and then a reverse current is generated from the second end of the driving module to the first end of the driving module, and then the potential of the first end of the driving module is raised, thereby increasing the potential difference between the control end and the first end of the driving module, which is conducive to making the threshold voltages of the driving modules of the pixel circuits in different light-emitting areas of the display panel tend to be consistent, thereby improving the afterimage phenomenon.

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods and means well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0045] Figure 1 FIG. 1 is a schematic diagram of a circuit structure of a pixel circuit provided in an embodiment of the present application. Figure 1As shown, an embodiment of the present application provides a pixel circuit 110, which includes a driving module 111, a first light-emitting control module 112 and a potential adjustment module 113; wherein the driving module 111 is used to drive the light-emitting device OLED to emit light; the first end of the first light-emitting control module 112 is connected to the first end of the driving module 111, and the control end of the first light-emitting control module 112 is connected to the light-emitting control signal line EM; the first end of the potential adjustment module 113 is connected to the light-emitting control signal line EM, and the second end of the potential adjustment module 113 is connected to the second end of the driving module 111.

[0046] When the light-emitting control potential in the light-emitting control signal line EM jumps to a high level, the potential of the first end of the potential regulating module 113 jumps to a high level accordingly, and then the potential of the second end of the potential regulating module 113 is coupled and raised, that is, the potential of the second end of the driving module 111 is coupled and raised, thereby generating a reverse current flowing from the second end of the driving module 111 to the first end of the driving module 111, and then raising the potential of the first end of the driving module 111, thereby increasing the potential difference between the control end and the first end of the driving module 111, which is beneficial to make the threshold voltages of the driving modules 111 of the pixel circuits 110 in different light-emitting areas of the display panel tend to be consistent, thereby improving the afterimage phenomenon.

[0047] refer to Figure 1 The potential regulating module 113 includes a first capacitor, a first electrode plate of the first capacitor is connected to a first end of the potential regulating module 113 , and a second electrode plate of the first capacitor is connected to a second end of the potential regulating module 113 .

[0048] An embodiment of the present application provides an implementation method of a potential regulating module 113, which specifically includes a first capacitor, and through a one-to-one correspondence between the two plates of the first capacitor and the two terminals of the potential regulating module 113, the first plate of the first capacitor jumps to a high level, and then the potential of the second plate of the first capacitor is coupled and raised.

[0049] refer to Figure 1 The driving module 111 includes a first transistor T1, a first electrode of the first transistor T1 is connected to a first end of the driving module 111, a second electrode of the first transistor T1 is connected to a second end of the driving module 111, and a control electrode of the first transistor T1 is connected to a control end of the driving module 111.

[0050] The embodiment of the present application provides an implementation method of a driving module 111, which specifically includes a first transistor T1, and through a one-to-one connection between the three electrodes of the first transistor T1 and the three terminals of the driving module 111, the purpose of using the first transistor T1 to drive the light-emitting device OLED to emit light is achieved.

[0051] In the embodiment of the present application, the first transistor T1 and other transistors mentioned below may be P-type transistors. For a P-type transistor, the on-level is a low level and the off-level is a high level. That is, when the control electrode of the P-type transistor is at a low level, the first electrode and the second electrode thereof are connected, and when the control electrode of the P-type transistor is at a high level, the first electrode and the second electrode thereof are disconnected.

[0052] In a specific implementation, the gate of each transistor serves as its control electrode, and, depending on the signal of the gate of each transistor and its type, its first electrode can be used as the source and the second electrode as the drain, or its first electrode can be used as the drain and the second electrode as the source, without making any distinction here. In addition, the on-level and off-level in the embodiments of the present application are general terms, the on-level refers to any level that can turn on the transistor, and the off-level refers to any level that can turn off / off the transistor.

[0053] In the embodiments of the present application, the term “connection” may refer to a direct connection between two components, or may refer to a connection between two components via one or more other components.

[0054] refer to Figure 1 Preferably, the first light emitting control module 112 includes a second transistor T2, a first electrode of the second transistor T2 is connected to the first end of the first light emitting control module 112, a second electrode of the second transistor T2 is connected to the second end of the first light emitting control module 112, and a control electrode of the second transistor T2 is connected to the control end of the first light emitting control module 112.

[0055] The second end of the first light emitting control module 112 is connected to the first power signal line vdd. The embodiment of the present application provides an implementation of the first light emitting control module 112, specifically including a second transistor T2, which is turned on in response to the light emitting control signal in the light emitting control signal line EM to input the first power signal in the first power signal line vdd to the first electrode of the first transistor T1.

[0056] refer to Figure 1 The pixel circuit 110 further includes a first reset module 114, a first end of the first reset module 114 is connected to the control end of the driving module 111, a second end of the first reset module 114 is connected to the first initialization signal line vref1, and a control end of the first reset module 114 is connected to the first switch signal line S1.

[0057] Preferably, the first reset module 114 includes a third transistor T3, a first electrode of the third transistor T3 is connected to the first end of the first reset module 114, a second electrode of the third transistor T3 is connected to the second end of the first reset module 114, and a control electrode of the third transistor T3 is connected to the control end of the first reset module 114.

[0058] An embodiment of the present application provides an implementation method of a first reset module 114, specifically including a third transistor T3, which is turned on in response to a first switching signal in the first switching signal line S1 to write a first initialization signal in the first initialization signal line vref1 to a control electrode of the first transistor T1 and initialize the first terminal potential of the storage module 119.

[0059] Figure 2 FIG. 2 is a schematic diagram of a circuit structure of a pixel circuit provided in another embodiment of the present application. Figure 2 As shown, the first reset module 114 includes a first sub-transistor T3-1 and a second sub-transistor T3-2, the first electrode of the first sub-transistor T3-1 is connected to the first end of the first reset module 114, the second electrode of the first sub-transistor T3-1 is connected to the first electrode of the second sub-transistor T3-2, the second electrode of the second sub-transistor T3-2 is connected to the second end of the first reset module 114, and the control electrode of the first sub-transistor T3-1 and the control electrode of the second sub-transistor T3-2 are both connected to the control end of the first reset module 114.

[0060] That is to say, the embodiment of the present application provides another implementation method of the first reset module 114, specifically a double-gate transistor composed of a first sub-transistor T3-1 and a second sub-transistor T3-2, thereby improving the leakage phenomenon of the control electrode of the first transistor T1, thereby improving the stability and reliability of the pixel circuit 110.

[0061] In actual application, the first sub-transistor T3-1 and the second sub-transistor T3-2 are turned on in response to the first switching signal in the first switching signal line S1 to write the first initialization signal in the first initialization signal line vref1 into the control electrode of the first transistor T1 and initialize the first terminal potential of the storage module 119.

[0062] refer to Figure 2 Preferably, the pixel circuit 110 also includes a second reset module 115, a first end of the second reset module 115 is connected to the first electrode of the light-emitting device OLED, a second end of the second reset module 115 is connected to the second initialization signal line vref2, and a control end of the second reset module 115 is connected to the first switch signal line S1.

[0063] Preferably, the second reset module 115 includes a fourth transistor T4, a first electrode of the fourth transistor T4 is connected to the first end of the second reset module 115, a second electrode of the fourth transistor T4 is connected to the second end of the second reset module 115, and a control electrode of the fourth transistor T4 is connected to the control end of the second reset module 115.

[0064] An embodiment of the present application provides an implementation method of a second reset module 115, specifically including a fourth transistor T4, which is turned on in response to a first switching signal in the first switching signal line S1 to write a second initialization signal in the second initialization signal line vref2 to the first electrode of the light-emitting device OLED, thereby initializing the potential of the first electrode of the light-emitting device OLED.

[0065] refer to Figure 2 The pixel circuit 110 further includes a data writing module 116, a first end of the data writing module 116 is connected to the data signal line data, a second end of the data writing module 116 is connected to the first end of the driving module 111, and a control end of the data writing module 116 is connected to the second switch signal line S2.

[0066] Preferably, the data writing module 116 includes a fifth transistor T5, a first electrode of the fifth transistor T5 is connected to the first end of the data writing module 116, a second electrode of the fifth transistor T5 is connected to the second end of the data writing module 116, and a control electrode of the fifth transistor T5 is connected to the control end of the data writing module 116.

[0067] The embodiment of the present application provides an implementation method of a data writing module 116, specifically including a fifth transistor T5, which is turned on in response to a second switching signal in the second switching signal line S2 to write a data signal in the data signal line data into the first electrode of the first transistor T1.

[0068] refer to Figure 2 The pixel circuit 110 further includes a compensation module 117, a first end of the compensation module 117 is connected to the control end of the driving module 111, a second end of the compensation module 117 is connected to the second end of the driving module 111, and a control end of the compensation module 117 is connected to the second switch signal line S2.

[0069] Figure 3 FIG. 2 is a schematic diagram of a circuit structure of a pixel circuit provided by another embodiment of the present application. Figure 3 The compensation module 117 includes a sixth transistor T6, a first electrode of the sixth transistor T6 is connected to the first end of the compensation module 117, a second electrode of the sixth transistor T6 is connected to the second end of the compensation module 117, and a control electrode of the sixth transistor T6 is connected to the control end of the compensation module 117.

[0070] The embodiment of the present application provides an implementation of a compensation module 117 , which specifically includes a sixth transistor T6 , and the sixth transistor T6 is turned on in response to a second switch signal in the second switch signal line S2 .

[0071] Figure 4 FIG. 2 is a schematic diagram of a circuit structure of a pixel circuit provided in another embodiment of the present application. Figure 4 As shown, the compensation module 117 includes a third sub-transistor T6-1 and a fourth sub-transistor T6-2, the first electrode of the third sub-transistor T6-1 is connected to the first end of the compensation module 117, the second electrode of the third sub-transistor T6-1 is connected to the first electrode of the fourth sub-transistor T6-2, the second electrode of the fourth sub-transistor T6-2 is connected to the second end of the compensation module 117, and the control electrode of the third sub-transistor T6-1 and the control electrode of the fourth sub-transistor T6-2 are both connected to the control end of the compensation module 117.

[0072] The embodiment of the present application provides another implementation method of the compensation module 117, specifically a double-gate transistor composed of a third sub-transistor T6-1 and a fourth sub-transistor T6-2, thereby improving the leakage phenomenon of the control electrode of the first transistor T1, thereby improving the stability and reliability of the pixel circuit 110.

[0073] In actual application, the third sub-transistor T6 - 1 and the fourth sub-transistor T6 - 2 are turned on in response to the second switch signal in the second switch signal line S2 .

[0074] refer to Figure 4 The pixel circuit 110 also includes a second light emitting control module 118, a first end of the second light emitting control module 118 is connected to the second end of the driving module 111, a second end of the second light emitting control module 118 is connected to the first electrode of the light emitting device OLED, and a control end of the second light emitting control module 118 is connected to the light emitting control signal line EM.

[0075] Preferably, the second light-emitting control module 118 includes a seventh transistor T7, a first electrode of the seventh transistor T7 is connected to the first end of the second light-emitting control module 118, a second electrode of the seventh transistor T7 is connected to the second end of the second light-emitting control module 118, and a control electrode of the seventh transistor T7 is connected to the control end of the second light-emitting control module 118.

[0076] The embodiment of the present application provides an implementation of a second light emitting control module 118, specifically including a seventh transistor T7, which is turned on in response to a light emitting control signal in a light emitting control signal line EM to input the current of the second electrode of the first transistor T1 to the first electrode of the light emitting device OLED. Further, the second electrode of the light emitting device OLED is connected to the second power signal line vss, thereby realizing that the light emitting device OLED is turned on and emits light.

[0077] The first electrode of the light emitting device OLED may be an anode, and the second electrode of the light emitting device OLED may be a cathode.

[0078] refer to Figure 4The pixel circuit 110 further includes a storage module 119, a first end of the storage module 119 is connected to the control end of the driving module 111, and a second end of the storage module 119 is connected to the first power signal line vdd.

[0079] Preferably, the storage module 119 includes a second capacitor, a first plate of the second capacitor is connected to a first end of the storage module 119 , and a second plate of the second capacitor is connected to a second end of the storage module 119 .

[0080] An embodiment of the present application provides an implementation method of a storage module 119, which specifically includes a second capacitor. In the light-emitting stage, the second transistor T2 and the seventh transistor T7 are turned on in response to the light-emitting control signal in the light-emitting control signal line EM, and the potential difference between the two ends of the second capacitor is used to drive the light-emitting device OLED to emit light.

[0081] In the present application, the first electrode of the first transistor T1 is denoted as a node S, and the second electrode of the first transistor T1 is denoted as a node D. Figure 5 Shown is the use of Figure 4 The waveform simulation diagram of the node potential change during the operation of the pixel circuit is shown in FIG. Figure 5 As shown, Vs is the potential of the node S, Vd is the potential of the node D, and I_T1 is the current of the first transistor T1. Figure 5 It can be seen that when the light-emitting control potential in the light-emitting control signal line EM jumps to a high level, the potential of the first end of the potential adjustment module 113 jumps to a high level accordingly, and then the potential of the second end of the potential adjustment module 113 is coupled and raised, that is, the potential of the second electrode (node ​​D) of the first transistor T1 is coupled and raised, thereby generating a reverse current flowing from the second electrode (node ​​D) of the first transistor T1 to the first electrode (node ​​S) of the first transistor T1, thereby raising the potential of the first electrode of the first transistor T1.

[0082] When the light-emitting control potential in the light-emitting control signal line EM is at a low level, the potential of the node D is the first electrode potential V of the light-emitting device OLED in the previous frame light-emitting stage. anode , at this time, the potential difference between the second end of the first capacitor and its first end is V anode -V GL , where V GL It is the low level of the light emitting control potential.

[0083] When the light emission control potential in the light emission control signal line EM jumps to a high level, the potential of the node D is At this time, the potential coupling rise of node D is Where, C is the capacitance of the first capacitor, V GH is the high level of the light emitting control potential, C D_vdd is the capacitance between node D and the first power signal line vdd, CGD is the capacitance between the node D and the control electrode of the first transistor T1.

[0084] Figure 6 The related art pixel circuit and the Figure 4 Schematic diagram showing a comparison of the potential difference between the control terminal and the first terminal of the driving module of the pixel circuit. Figure 6 As shown, the left side is a schematic diagram of the potential difference between the control terminal and the first terminal of the driving module of the pixel circuit of the related art, and the right side is a schematic diagram of the potential difference between the control terminal and the first terminal of the driving module of the pixel circuit of the related art. Figure 4 Schematic diagram of the potential difference between the driving module control terminal and the first terminal of the pixel circuit shown in FIG. Wherein, Vgs is the potential difference between the driving module control terminal and the first terminal of the pixel circuit of the related art, Vgs is -8.8V; Vgs' ... Figure 4 The potential difference between the control terminal and the first terminal of the driving module of the pixel circuit shown in the figure is -10.3V. Figure 4 In the pixel circuit 110 shown, the potential difference (absolute value) between the control end and the first end of the driving module 111 is relatively large, which is conducive to making the threshold voltages of the driving module 111 of the pixel circuits 110 in different light-emitting areas of the display panel tend to be consistent, thereby improving the afterimage phenomenon.

[0085] The above describes in detail the circuit structure of the pixel circuit 110 provided by the present application, and the following describes the driving method of the pixel circuit. The driving method can be applied to the pixel circuit provided by the related art, thereby improving the afterimage phenomenon; it can also be applied to the pixel circuit 110 provided by the present application, thereby further improving the afterimage phenomenon.

[0086] Figure 7 FIG. 1 is a flow chart of a driving method of a pixel circuit provided in an embodiment of the present application. Figure 8 FIG. 1 is a schematic diagram of a driving timing sequence of a pixel circuit provided by an embodiment of the present application. Figure 7 and 8 As shown, an embodiment of the present application provides a driving method for a pixel circuit, wherein the pixel circuit 110 includes a driving module 111, and the pixel circuit 110 is electrically connected to the light-emitting device OLED. The driving method includes: a reset phase t1, for resetting the control end of the driving module 111; a data writing phase t2, for writing a data voltage signal into the first end of the driving module 111; and a light-emitting phase t3, for driving the light-emitting device OLED to emit light; wherein there is a time interval between the end time of the reset phase and the start time of the data writing phase.

[0087] In the embodiment of the present application, there is a time interval between the end time of the reset phase and the start time of the data writing phase, which is conducive to maintaining the potential of the first end (node ​​S) of the driving module 111 for a sufficiently long time after being raised, thereby facilitating increasing the potential difference between the control end and the first end of the driving module 111, thereby facilitating making the threshold voltages of the driving module 111 of the pixel circuits 110 in different light-emitting areas of the display panel tend to be consistent, thereby improving the afterimage phenomenon.

[0088] The time interval between the end time of the reset phase and the start time of the data writing phase can be set according to actual needs and is not further limited here.

[0089] Fig. 9 FIG. 1 is a schematic diagram of the structure of an array substrate provided by an embodiment of the present application. Fig. 9 As shown, an embodiment of the present application provides an array substrate 100, and the array substrate 100 includes a pixel circuit 110 provided in any of the above embodiments. The technical principles and effects produced are similar and will not be repeated here.

[0090] Fig.10 FIG. 1 is a schematic diagram of the structure of a display panel provided by an embodiment of the present application. Fig.10 As shown, the embodiment of the present application provides a display panel 10, the display panel 10 includes a plurality of light-emitting devices arranged in an array; and an array substrate as provided in the above embodiment, the array substrate includes a plurality of pixel circuits, and the plurality of light-emitting devices and the plurality of pixel circuits are connected one-to-one. The technical principles and effects produced by the display panel 10 and the pixel circuit in the present application are similar, and will not be repeated here.

[0091] It is understandable that the display panel 10 can be, for example, a mobile terminal, a tablet computer, a computer monitor, a television, a wearable device, an information query machine, or any other product or component with a display function.

[0092] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0093] It should also be noted that, in the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application. Although multiple exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A pixel circuit, characterized in that: include: A driving module, used for driving the light-emitting device to emit light; A first light-emitting control module, wherein a first end of the first light-emitting control module is connected to a first end of the driving module, and a control end of the first light-emitting control module is connected to a light-emitting control signal line; A potential regulating module, wherein a first end of the potential regulating module is connected to the light-emitting control signal line, and a second end of the potential regulating module is connected to a second end of the driving module.

2. The pixel circuit according to claim 1, characterized in that: The potential regulating module comprises a first capacitor, a first plate of the first capacitor is connected to a first end of the potential regulating module, and a second plate of the first capacitor is connected to a second end of the potential regulating module.

3. The pixel circuit according to claim 1, characterized in that: The driving module comprises a first transistor, a first electrode of the first transistor is connected to a first end of the driving module, a second electrode of the first transistor is connected to a second end of the driving module, and a control electrode of the first transistor is connected to a control end of the driving module; Preferably, the first light-emitting control module includes a second transistor, a first electrode of the second transistor is connected to the first end of the first light-emitting control module, a second electrode of the second transistor is connected to the second end of the first light-emitting control module, and a control electrode of the second transistor is connected to the control end of the first light-emitting control module.

4. The pixel circuit according to claim 1, characterized in that: Also includes: a first reset module, wherein a first end of the first reset module is connected to a control end of the driving module, a second end of the first reset module is connected to a first initialization signal line, and a control end of the first reset module is connected to a first switch signal line; Preferably, the first reset module includes a third transistor, a first electrode of the third transistor is connected to the first end of the first reset module, a second electrode of the third transistor is connected to the second end of the first reset module, and a control electrode of the third transistor is connected to the control end of the first reset module; or Preferably, the first reset module comprises a first sub-transistor and a second sub-transistor, a first electrode of the first sub-transistor is connected to a first end of the first reset module, a second electrode of the first sub-transistor is connected to a first electrode of the second sub-transistor, a second electrode of the second sub-transistor is connected to a second end of the first reset module, and a control electrode of the first sub-transistor and a control electrode of the second sub-transistor are both connected to a control end of the first reset module; Preferably, the pixel circuit further comprises a second reset module, a first end of the second reset module is connected to the first electrode of the light emitting device, a second end of the second reset module is connected to a second initialization signal line, and a control end of the second reset module is connected to the first switch signal line; Preferably, the second reset module includes a fourth transistor, a first electrode of the fourth transistor is connected to the first end of the second reset module, a second electrode of the fourth transistor is connected to the second end of the second reset module, and a control electrode of the fourth transistor is connected to the control end of the second reset module.

5. The pixel circuit according to claim 1, characterized in that: Also includes: A data writing module, wherein a first end of the data writing module is connected to a data signal line, a second end of the data writing module is connected to a first end of the driving module, and a control end of the data writing module is connected to a second switch signal line; Preferably, the data writing module comprises a fifth transistor, a first electrode of the fifth transistor is connected to the first end of the data writing module, a second electrode of the fifth transistor is connected to the second end of the data writing module, and a control electrode of the fifth transistor is connected to the control end of the data writing module; Preferably, the pixel circuit further comprises a compensation module, a first end of the compensation module is connected to the control end of the driving module, a second end of the compensation module is connected to the second end of the driving module, and the control end of the compensation module is connected to the second switch signal line; Preferably, the compensation module comprises a sixth transistor, a first electrode of the sixth transistor is connected to the first end of the compensation module, a second electrode of the sixth transistor is connected to the second end of the compensation module, and a control electrode of the sixth transistor is connected to the control end of the compensation module; or Preferably, the compensation module includes a third sub-transistor and a fourth sub-transistor, the first electrode of the third sub-transistor is connected to the first end of the compensation module, the second electrode of the third sub-transistor is connected to the first electrode of the fourth sub-transistor, the second electrode of the fourth sub-transistor is connected to the second end of the compensation module, and the control electrode of the third sub-transistor and the control electrode of the fourth sub-transistor are both connected to the control end of the compensation module.

6. The pixel circuit according to claim 1, characterized in that: Also includes: a second light-emitting control module, wherein a first end of the second light-emitting control module is connected to a second end of the driving module, a second end of the second light-emitting control module is connected to a first electrode of the light-emitting device, and a control end of the second light-emitting control module is connected to the light-emitting control signal line; Preferably, the second light-emitting control module includes a seventh transistor, a first electrode of the seventh transistor is connected to the first end of the second light-emitting control module, a second electrode of the seventh transistor is connected to the second end of the second light-emitting control module, and a control electrode of the seventh transistor is connected to the control end of the second light-emitting control module.

7. The pixel circuit according to any one of claims 1 to 6, characterized in that: Also includes: A storage module, wherein a first end of the storage module is connected to a control end of the driving module, and a second end of the storage module is connected to a first power signal line; Preferably, the storage module includes a second capacitor, a first electrode plate of the second capacitor is connected to a first end of the storage module, and a second electrode plate of the second capacitor is connected to a second end of the storage module.

8. A method for driving a pixel circuit, characterized in that: The pixel circuit includes a driving module, the pixel circuit is electrically connected to the light emitting device, and the driving method includes: The reset stage is used to reset the control end of the driving module; A data writing phase is used to write a data voltage signal into the first end of the driving module; The light-emitting stage is used to drive the light-emitting device to emit light; There is a time interval between the end time of the reset phase and the start time of the data writing phase.

9. An array substrate, characterized in that: The method comprises the pixel circuit as claimed in any one of claims 1 to 7.

10. A display panel, characterized in that: include: A plurality of light emitting devices arranged in an array; The array substrate as claimed in claim 9, wherein the array substrate comprises a plurality of pixel circuits, and the plurality of light emitting devices and the plurality of pixel circuits are connected in a one-to-one correspondence.

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