A pixel circuit and a driving method thereof, and a display panel

Abstract

The present application discloses a pixel circuit and a driving method thereof, and a display panel, wherein the pixel circuit comprises: a driving module, wherein the first end of the driving module is connected to a first voltage source; a first capacitor module, wherein the first end of the first capacitor module is connected to the first voltage source, and the second end of the first capacitor module is connected to the control end of the driving module; a data writing module, wherein the first end of the data writing module is connected to a data line, the second end of the data writing module is connected to the control end of the driving module, and the third end of the data writing module is connected to a third scanning line, so as to provide the data voltage on the data line to the control end of the driving module; and a light-emitting module, wherein the first end of the light-emitting module is connected to the second end of the driving module, and the second end of the light-emitting module is connected to the second voltage source. In the above manner, the pixel circuit of the present application not only ensures a high refresh display function, but also ensures a better compensation effect.

Description

Technical Field

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

[0002] Nowadays, with the continuous development of display technology, people's demand for improving the refresh rate of the screen is also increasing. However, the pixel circuit in the traditional display panel usually adopts the 7T1C (7 transistors and 1 capacitor) circuit. Since the capacitance of the charging capacitor Cst in the 7T1C circuit is usually fixed, its charging time is limited. Therefore, when the 7T1C circuit performs Vdata (data voltage signal) write compensation, there is a problem of insufficient high-frequency display compensation due to the shortened downlink time of the high-refresh display. Summary of the invention

[0003] The main technical problem solved by the present application is to provide a pixel circuit and a driving method thereof, and a display panel, which can solve the problem of insufficient compensation of the pixel circuit in the prior art during high-frequency display.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a pixel circuit, wherein the pixel circuit includes: a driving module, a first end of the driving module is connected to a first voltage source; a first capacitor module, a first end of the first capacitor module is connected to the first voltage source, and a second end of the first capacitor module is connected to a control end of the driving module; a data writing module, a first end of the data writing module is connected to a data line, a second end of the data writing module is connected to the control end of the driving module, and a third end of the data writing module is connected to a third scanning line, so as to provide the data voltage on the data line to the control end of the driving module; a light-emitting module, a first end of the light-emitting module is connected to the second end of the driving module, and a second end of the light-emitting module is connected to a second voltage source.

[0005] Among them, the pixel circuit also includes a first potential control module, the first end of the first potential control module is connected to the second end of the driving module, the second end of the first potential control module is connected to the control end of the driving module, and the third end of the first potential control module is connected to the first scan line.

[0006] Among them, the pixel circuit also includes a second potential control module, the first end of the second potential control module is connected to the second end of the first potential control module, the second end of the second potential control module is connected to the control end of the driving module, and the third end of the second potential control module is connected to the first scan line.

[0007] The pixel circuit further includes a second capacitor module, a first end of the second capacitor module is connected to a second end of the data writing module, and a second end of the second capacitor module is connected to a control end of the driving module.

[0008] Among them, the pixel circuit also includes a first initialization module, the first end of the first initialization module is connected to the reference voltage line, the second end of the first initialization module is connected to the first end of the second capacitor module, and the third end of the first initialization module is connected to the second scan line, so as to provide the initial voltage on the reference voltage line to the first end of the second capacitor module.

[0009] Among them, the pixel circuit also includes a second initialization module and a third initialization module, the first end of the second initialization module is connected to the second end of the second potential control module, the second end of the second initialization module is connected to the first end of the third initialization module and the reference voltage line, the third end of the second initialization module is connected to the second scan line, the second end of the third initialization module is connected to the first end of the light-emitting module, and the third end of the third initialization module is connected to the second scan line, so as to control the writing of the initial voltage into the first end of the light-emitting module, and enable the second potential control module to write the initial voltage into the second end of the first capacitor module.

[0010] Among them, the pixel circuit also includes a light-emitting control module, a first end of the light-emitting control module is connected to the second end of the driving module, the second end of the light-emitting control module is connected to the first end of the light-emitting module, and a third end of the light-emitting control module is connected to the emission signal line to control the connection between the second end of the driving module and the first end of the light-emitting module.

[0011] In order to solve the above-mentioned technical problems, another technical solution adopted in the present application is: to provide a driving method for a pixel circuit, which is applied to the pixel circuit as described above, wherein the driving method includes: in the threshold compensation stage, controlling the first potential control module and the second potential control module to be turned on, and the first voltage source charges the first capacitor module to compensate for the threshold voltage of the driving module; in the data writing stage, controlling the first potential control module, the second potential control module and the data writing module to be turned on, the data writing module writes the data voltage to the first end of the second capacitor module, the second end of the second capacitor module is coupled to the control end of the driving module to write the data voltage, and the first capacitor module is coupled to the control end of the driving module to write the threshold voltage; in the light-emitting stage within the display cycle, controlling the light-emitting control module to be turned on, so that the driving module drives the light-emitting module to emit light according to the voltage between its control end and the second end.

[0012] Among them, before the threshold compensation stage, it also includes an initialization stage: controlling the first potential control module, the second potential control module, the first initialization module, the second initialization module and the third initialization module to be turned on, the first initialization module writes the initial voltage into the first end of the second capacitor module, the second potential control module writes the initial voltage into the second end of the first capacitor module, and the third initialization module writes the initial voltage into the light-emitting module.

[0013] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a display panel, wherein the display panel includes a driving circuit and a pixel circuit connected to each other; wherein the pixel circuit is a pixel circuit as described in any one of the above items.

[0014] The beneficial effects of the present application are as follows: the first end of the driving module in the pixel circuit provided by the present application is connected to the first voltage source, and the first end and the second end of the first capacitor module are respectively connected to the first voltage source and the control end of the driving module, the first end, the second end and the third end of the data writing module are respectively connected to the data line, the control end of the driving module and the third scanning line, the first end and the second end of the light-emitting module are respectively connected to the second end of the driving module and the second voltage source, the data writing module is used to directly provide the data voltage on the data line to the control end of the driving module, so as to separate the writing of the data voltage and the compensation stage of the threshold voltage of the driving module, and shorten the writing time of the data voltage by directly writing the data voltage, but the compensation time is not limited by the line time, so that it can both shorten the line time to achieve high refresh display and satisfy that the compensation effect is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0016] Figure 1 is a structural schematic diagram of a first embodiment of a pixel circuit of the present application;

[0017] Figure 2 is a structural schematic diagram of a second embodiment of a pixel circuit of the present application;

[0018] Figure 3 yes Figure 2 A structural schematic diagram of a specific embodiment of a pixel circuit;

[0019] Figure 4 yes Figure 3 A timing diagram of a control signal corresponding to a driving method of a pixel circuit in FIG.

[0020] Figure 5 yes Figure 3 Schematic diagram of grayscale expansion simulation results of pixel circuit in;

[0021] Figure 6 It is a flowchart of an implementation method of a pixel circuit driving method of the present application;

[0022] Figure 7It is a schematic structural diagram of an embodiment of a display panel of the present application. DETAILED DESCRIPTION

[0023] 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.

[0024] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0027] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of the first embodiment of the pixel circuit of the present application. In this embodiment, the pixel circuit 10 includes: a driving module 11, a first capacitor module 12, a data writing module 13 and a light emitting module 14.

[0028] It should be noted that in the field of display technology, the display panel usually continuously provides current to the light-emitting module 14 in the pixel circuit 10 through a constant current source outputted by its system power supply to the pixel circuit 10. The magnitude of the current is specifically controlled by the voltage regulation of the control terminal of the driving module 11 in the pixel circuit 10, and the voltage of the control terminal of the driving module 11 is written by the data signal correspondingly provided by the driving circuit of the display panel to the pixel circuit 10, so as to be stored in the first capacitor module 12 in the pixel circuit 10, thereby ensuring that the light-emitting module 14 can continuously emit light in a scanning cycle of the driving circuit to realize the corresponding image display.

[0029] Specifically, the first end of the driving module 11 is correspondingly connected to a first voltage source 101 provided by the system power supply, and the first voltage source 101 is specifically a constant current source.

[0030] The first end of the first capacitor module 12 is also correspondingly connected to the first voltage source 101, that is, it is also correspondingly connected to the first end of the driving module 11, and the second end of the first capacitor module 12 is connected to the control end of the driving module 11, so that the threshold voltage of the driving module 11 can be compensated by the leakage process performed by the first capacitor module 12 with the help of the first voltage source 101 at the corresponding stage, so as to avoid the brightness of the light-emitting module 14 changing due to the instability of the threshold voltage, and the phenomenon of serious non-uniform light emission.

[0031] Furthermore, a first end of the data writing module 13 is connected to a data line 201 in a corresponding display panel for receiving a data voltage provided by the data line 201, and a second end of the data writing module 13 is connected to a control end of the driving module 11, and a third end of the data writing module 13 is connected to a third scanning line 204 for receiving a third scanning signal provided corresponding to the third scanning line 204, and when triggered to be turned on by the third scanning signal, the data voltage on the data line 201 is provided to the control end of the driving module 11.

[0032] Furthermore, the first end of the light-emitting module 14 is specifically connected to the second end of the driving module 11, and the second end of the light-emitting module 14 is correspondingly connected to the second voltage source 102 provided by the system power supply, so that in a scanning cycle of the driving circuit, it can continuously emit light based on the output voltage correspondingly provided by the driving module 11 and the second voltage source 102 to achieve corresponding image display.

[0033] The above scheme enables the data writing module 13 to directly provide the data voltage on the data line 201 to the control end of the driving module 11, so as to effectively shorten the writing time of the data voltage by directly writing the data voltage, but the compensation time is not limited by the line time, thereby being able to both shorten the line time to achieve high refresh display and ensure that the compensation effect is not affected.

[0034] See also Figure 2 , Figure 2 This is a schematic diagram of the structure of the second embodiment of the pixel circuit of the present application. This embodiment is based on the first embodiment of the pixel circuit provided in the present application, and the pixel circuit 20 specifically further includes a first potential control module 251 .

[0035] Specifically, the first end of the first potential control module 251 is connected to the second end of the driving module 21, the second end of the first potential control module 251 is connected to the control end of the driving module 21, and the third end of the first potential control module 251 is connected to the first scanning line 202, so as to receive the first scanning signal provided by the first scanning line 202, and when triggered to conduct under the action of the first scanning signal, the first capacitor module 22 compensates for the threshold voltage of the driving module 21 with the help of the leakage process performed by the first voltage source 101 in the corresponding stage, so as to avoid the brightness of the light-emitting module 24 changing due to the instability of the threshold voltage, and the occurrence of serious uneven light emission.

[0036] At the same time, taking into account the leakage of the first capacitor C1 during low refresh display, the first potential control module 251 can specifically control the potential of the control end of the driving module 21 to avoid leakage of the first capacitor module 22 during low refresh display, affecting the display effect, thereby improving low refresh flicker and achieving a low refresh display effect.

[0037] Furthermore, in another embodiment, the pixel circuit 10 specifically includes a second potential control module 252, and the first end of the second potential control module 252 is connected to the second end of the first potential control module 251, and the second end of the second potential control module 252 is connected to the control end of the driving module 21, that is, the second end of the first potential control module 251 is specifically connected to the control end of the driving module 21 through the second potential control module 252, and the third end of the second potential control module 252 is also correspondingly connected to the first scanning line 202, so as to receive the first scanning signal correspondingly provided by the first scanning line 202, and when triggered to be turned on under the action of the first scanning signal, it cooperates with the first potential control module 251 and the first capacitor module 22 to compensate for the threshold voltage of the driving module 21, and control the potential of the control end of the driving module 21, that is, the leakage of the first capacitor module 22 is controlled at the same time, so as to improve low refresh flicker and achieve a low refresh display effect.

[0038] In one embodiment, the pixel circuit 10 specifically also includes a second capacitor module 26, the first end of the second capacitor module 26 is connected to the second end of the data writing module 13, and the second end of the second capacitor module 26 is connected to the control end of the driving module 21, so that when the data writing module 13 is triggered to turn on, the data voltage at the second end of the data writing module 13 can be transmitted to the control end of the driving module 21 through the second capacitor module 26, so as to avoid the leakage of the first capacitor module 22 from adversely affecting the data writing module 13.

[0039] Furthermore, in one embodiment, the pixel circuit 10 specifically includes a first initialization module 281, a first end of the first initialization module 281 is connected to a reference voltage line 205 in the display panel, so as to receive an initial voltage corresponding to the reference voltage line 205, and a second end of the first initialization module 281 is connected to a first end of a second capacitor module 26, and a third end of the first initialization module 281 is connected to a second scanning line 203, so as to receive a second scanning signal corresponding to the second scanning line 203, so that when the conduction is triggered by the second scanning signal, the initial voltage corresponding to the reference voltage line 205 is written into the first end of the second capacitor module 26, so as to initialize the second capacitor module 26, that is, reset it, so as to clear any residual signals that may exist in the previous stage.

[0040] In one embodiment, the pixel circuit 20 specifically also includes a second initialization module 282 and a third initialization module 283, and the first end of the second initialization module 282 is connected to the second end of the second potential control module 252, and the second end of the second initialization module 282 is connected to the first end of the third initialization module 283 and the reference voltage line 205 in the display panel, so that the second initialization module 282 and the third initialization module 283 can receive the initial voltage provided corresponding to the reference voltage line 205.

[0041] Among them, the pixel circuit 10 also includes a second initialization module 282 and a third initialization module 283, the first end of the second initialization module 282 is connected to the second end of the second potential control module 252, the second end of the second initialization module 282 is connected to the first end of the third initialization module 283 and the reference voltage line 205, the third end of the second initialization module 282 is connected to the second scan line 203, the second end of the third initialization module 283 is connected to the first end of the light-emitting module 24, and the third end of the third initialization module 283 is connected to the second scan line 203, so as to control the writing of the initial voltage into the first end of the light-emitting module 24, and enable the second potential control module 252 to write the initial voltage into the second end of the first capacitor module 22.

[0042] Furthermore, the third end of the second initialization module 282 is connected to the second scan line 203, the second end of the third initialization module 283 is connected to the first end of the light-emitting module 24, and the third end of the third initialization module 283 is also correspondingly connected to the second scan line 203. The second initialization module 282 and the third initialization module 283 are used to receive the second scan signal provided corresponding to the second scan line 203, so as to trigger conduction under the action of the second scan signal, and when the second potential control module 252 is also triggered to be turned on under the action of the first scan signal, it is used to write the initial voltage provided corresponding to the reference voltage line 205 into the second end of the first capacitor module 22 and the first end of the light-emitting module 24, so as to initialize the first capacitor module 22 and the light-emitting module 24 at the same time, that is, reset them, so as to clear the signal residue that may exist in the previous stage.

[0043] In one embodiment, the pixel circuit 10 specifically also includes a light-emitting control module 27, a first end of the light-emitting control module 27 is connected to the second end of the driving module 21, a second end of the light-emitting control module 27 is connected to the first end of the light-emitting module 24, and a third end of the light-emitting control module 27 is connected to the emission signal line 206 in the display panel, so as to receive the emission signal provided by the emission signal line 206, and trigger conduction under the action of the emission signal to control the second end of the driving module 21 and the first end of the light-emitting module 24 to achieve connection, and then output the data voltage and the compensation threshold voltage stored in the first capacitor module 22 to the light-emitting module 24 accordingly, so as to ensure that the light-emitting module 24 continues to emit light in a scanning cycle.

[0044] Optionally, the driving module 21, the data writing module 23, the first potential control module 251, the second potential control module 252, the first initialization module 281, the second initialization module 282, the third initialization module 283 and the light emitting control module 27 may specifically include any reasonable switching devices such as a transistor, a P-type thin film transistor, an N-type thin film transistor and a field effect transistor, and the present application does not limit this.

[0045] It is worth noting that, in order to distinguish the two ends of the driving module 21 except the control end, one of the ends is called the first end and the other end is called the second end. When the driving module 21 is a triode, the control end can be specifically the base, the first end is the collector, and the second end is the emitter; or, the control end can also be specifically the base, the first end is the emitter, and the second end is the collector.

[0046] When the driving module 21 is a thin film transistor or a field effect transistor, the control end can be a gate, the first end is a drain, and the second end is a source; or, the control end can be a gate, the first end is a source, and the second end is a drain.

[0047] The first end, the second end and the third end of each module except the driving module 21 correspond to the first end, the second end and the control end of the driving module 21 respectively.

[0048] When each module is a thin film transistor or a field effect transistor, it may also be a composite transistor or a single transistor, which is not limited in the present application.

[0049] For ease of understanding, taking the above modules as P-type thin film transistors as an example, it can be seen that please refer to Figure 3 and Figure 4 , among which, the Figure 3 yes Figure 2 A schematic structural diagram of a specific embodiment of a pixel circuit in FIG. Figure 4 yes Figure 3 A timing diagram of a control signal corresponding to a driving method of a pixel circuit in FIG.

[0050] It is understandable that, in this embodiment, Figure 3 As shown, the driving module 21, the data writing module 23, the first potential control module 251, the second potential control module 252, the first initialization module 281, the second initialization module 282, the third initialization module 283 and the light control module 27 can specifically correspond to the first transistor T1, the second transistor T2, the third transistor T3, the sixth transistor T6, the eighth transistor T8, the fourth transistor T4, the seventh transistor T7 and the fifth transistor T5; and the first capacitor module 22 corresponds to the first capacitor C1, and the second capacitor module 26 corresponds to the second capacitor C 2, the light emitting module 24 corresponds to the light emitting device LED; the data line 201, the first scan line 202, the second scan line 203, the third scan line 204, the reference voltage line 205 and the emission signal line 206 respectively correspond to the data line Vdata, the first scan line Scan1, the second scan line Scan2, the third scan line Scan3, the reference voltage line Vref and the emission signal line EM; the first voltage source 101 and the second voltage source 102 respectively correspond to the first voltage source Vdd and the second voltage source Vss; wherein the connection method of the above-mentioned components is as follows Figure 3 As shown, no further description is given here.

[0051] From this we can see that Figure 4As shown, in the initialization stage, that is, in the stage t1, the first scanning signal corresponding to the first scanning line Scan1 and the second scanning signal corresponding to the second scanning line Scan2 are both in a low level state, so as to be able to control the third transistor T3, the sixth transistor T6, the fourth transistor T4, the seventh transistor T7 and the eighth transistor T8 to be triggered to be turned on, so that the initial voltage corresponding to the reference voltage line Vref can be written into the first capacitor C1, the light-emitting device LED and the second capacitor respectively, so as to initialize the first capacitor C1, the light-emitting device LED and the second capacitor at the same time, that is, to reset the first capacitor C1, the light-emitting device LED and the second capacitor to clear the signal residue that may exist in the previous stage.

[0052] In the threshold compensation stage, that is, in stage t2, the first scanning signal corresponding to the first scanning line Scan1 is still in a low level state, so that the third transistor T3 and the sixth transistor T6 can be triggered to be turned on, so that the second end of the first transistor T1 can be connected to its control end, so as to compensate the threshold voltage of the first transistor T1 by means of leakage current stored by the first capacitor C1 from the potential of the first voltage source VDD, so as to avoid the brightness of the light-emitting device LED changing due to the instability of the threshold voltage, and the phenomenon of serious non-uniform light emission.

[0053] In the data writing stage, that is, in the t3 stage, the first scanning signal corresponding to the first scanning line Scan1 and the third scanning signal corresponding to the third scanning line Scan3 are both in a low level state, so as to be able to control the third transistor T3, the sixth transistor T6 and the second transistor T2 to trigger conduction, so as to provide the data voltage on the data line Vdata to the first end of the second capacitor C2, and couple the data voltage to the control end of the first transistor T1 through the second capacitor C2, and the first capacitor C1 also couples the threshold voltage stored in the previous stage to the control end of the first transistor T1 to complete the writing of the data voltage in the pixel circuit 20.

[0054] During the light-emitting stage in the display cycle, that is, stage t4, the emission signal provided by the emission signal line EM is in a low level state, so as to control the fifth transistor T5 to trigger conduction, thereby causing the first transistor T1 to drive the light-emitting device LED to emit light according to the voltage between its control terminal and the second terminal.

[0055] It is understandable that this embodiment separates the threshold compensation stage from the data writing stage, shortens the writing time by direct writing of the data voltage, but the compensation time is not limited by the line time, which can satisfy both the requirement of shortening the line time to achieve high refresh display and the requirement of not affecting the compensation effect. At the same time, considering that the first capacitor C1 has leakage during low refresh display, the control terminal potential of the first transistor T1 is controlled by adding the sixth transistor T6 to support a wideband display effect.

[0056] For further information, please refer to Figure 5 , Figure 5 yes Figure 3 Schematic diagram of the grayscale expansion simulation results of the pixel circuit in.

[0057] It can be seen that according to the simulation results, the pixel circuit 20 in this embodiment can work normally, and the grayscale development is normal. In the vdata range of 0 to 7V (the difference between the source-drain current Ids of the first transistor T1 corresponding to the two brightness levels and the gate voltage value Vgs thereof), the current ratio is greater than 1E6, which meets the switching ratio requirements of the light-emitting device LED.

[0058] The present application also provides a driving method for a pixel circuit, see Figure 6 , Figure 6 This is a flow chart of an embodiment of a driving method of a pixel circuit of the present application. Specifically, it may include the following steps:

[0059] S31: In the threshold compensation stage, the first potential control module and the second potential control module are controlled to be turned on, and the first voltage source charges the first capacitor module to compensate for the threshold voltage of the driving module.

[0060] It is understandable that the driving method in this embodiment is specifically that the driving circuit in the corresponding display panel is Figure 2 For details, please refer to Figure 2 and Figure 4 And the related text content will not be repeated here.

[0061] Among them, Figure 4 As shown, in the threshold compensation stage, that is, in the t2 stage, the first scanning signal corresponding to the first scanning line is in a low level state, so that the first potential control module and the second potential control module can be controlled to trigger conduction, so as to compensate for the threshold voltage of the driving module by means of the leakage current stored by the first capacitor module from the first voltage source.

[0062] S32: In the data writing stage, the first potential control module, the second potential control module and the data writing module are controlled to be turned on, the data writing module writes the data voltage into the first end of the second capacitor module, the second end of the second capacitor module is coupled to the control end of the driving module to write the data voltage, and the first capacitor module is coupled to the control end of the driving module to write the threshold voltage.

[0063] Furthermore, in the data writing stage, that is, in the t3 stage, the first scanning signal corresponding to the first scanning line and the third scanning signal corresponding to the third scanning line are both in a low level state, so as to be able to correspondingly control the first potential control module, the second potential control module and the data writing module to trigger conduction, so as to write the data voltage at the first end of the data writing module into the first end of the second capacitor module, and the second end of the second capacitor module is coupled to the control end of the driving module to write the data voltage, and the first capacitor module will couple the control end of the driving module to write the threshold voltage.

[0064] S33: During the light-emitting phase within the display cycle, the light-emitting control module is controlled to be turned on, so that the driving module drives the light-emitting module to emit light according to the voltages at the control terminal and the second terminal thereof.

[0065] Furthermore, in the light-emitting stage within the display cycle, that is, in the t4 stage, the emission signal corresponding to the emission signal line is in a low level state, so as to be able to control the first light-emitting control module and the second light-emitting control module to trigger conduction, so that the driving module drives the light-emitting module to emit light according to the voltage at its control end and the second end.

[0066] Furthermore, in one embodiment, before the above-mentioned S31, it may specifically include: an initialization stage, that is, in the t1 stage, the first scanning signal corresponding to the first scanning line and the second scanning signal corresponding to the second scanning line are both in a low-level state, so as to be able to control the first potential control module, the second potential control module, the first initialization module, the second initialization module and the third initialization module to be turned on, so that the first initialization module writes the initial voltage into the first end of the second capacitor module, the second potential control module writes the initial voltage into the second end of the first capacitor module, and the third initialization module writes the initial voltage into the light-emitting module, so as to initialize the second capacitor module, the first capacitor module and the light-emitting module at the same time, that is, reset the adjustable capacitor module and the light-emitting module to clear the signal residues that may exist in the previous stage.

[0067] The present application also provides a display panel, see Figure 7 , Figure 7 1 is a schematic diagram of a structure of a display panel of the present application. In this embodiment, the display panel 40 includes a driving circuit 41 and a pixel circuit 42 connected to each other.

[0068] It should be noted that the pixel circuit 42 described in this embodiment is the pixel circuit 10 or the pixel circuit 20 described in any one of the above embodiments. Figure 1-Figure 5 And the related text content will not be repeated here.

[0069] The beneficial effect of the present application is as follows: different from the prior art, the first end of the driving module in the pixel circuit provided by the present application is connected to the first voltage source, and the first end and the second end of the first capacitor module are respectively connected to the first end and the control end of the driving module, the first end, the second end and the third end of the data writing module are respectively connected to the data line, the control end of the driving module and the third scanning line, the first end and the second end of the light-emitting module are respectively connected to the second end of the driving module and the second voltage source, the data writing module is used to directly provide the data voltage on the data line to the control end of the driving module, so as to shorten the writing time of the data voltage by directly writing the data voltage, but the compensation time is not limited by the line time, so that it can both satisfy the shortening of the line time to achieve high refresh display and the satisfaction that the compensation effect is not affected.

[0070] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A pixel circuit, characterized in that: The pixel circuit comprises: A driving module, a first end of which is connected to a first voltage source; a first potential control module, wherein a first end of the first potential control module is connected to a second end of the driving module, a second end of the first potential control module is connected to a control end of the driving module, and a third end of the first potential control module is connected to a first scan line; a second potential control module, wherein a first end of the second potential control module is connected to a second end of the first potential control module, a second end of the second potential control module is connected to a control end of the driving module, and a third end of the second potential control module is connected to the first scan line; A first capacitor module, wherein a first end of the first capacitor module is connected to the first voltage source, and a second end of the first capacitor module is connected to a control end of the driving module; a data writing module, wherein a first end of the data writing module is connected to the data line, a second end of the data writing module is connected to the control end of the driving module, and a third end of the data writing module is connected to the third scanning line, so as to provide the data voltage on the data line to the control end of the driving module; A second capacitor module, wherein a first end of the second capacitor module is connected to a second end of the data writing module, and a second end of the second capacitor module is connected to a control end of the driving module; a first initialization module, wherein a first end of the first initialization module is connected to a reference voltage line, a second end of the first initialization module is connected to a first end of the second capacitor module, and a third end of the first initialization module is connected to a second scan line, so as to provide an initial voltage on the reference voltage line to the first end of the second capacitor module; A light emitting module, wherein a first end of the light emitting module is connected to a second end of the driving module, and a second end of the light emitting module is connected to a second voltage source; a second initialization module and a third initialization module, wherein the first end of the second initialization module is connected to the second end of the second potential control module, the second end of the second initialization module is connected to the first end of the third initialization module and the reference voltage line, the third end of the second initialization module is connected to the second scan line, the second end of the third initialization module is connected to the first end of the light emitting module, and the third end of the third initialization module is connected to the second scan line, so as to control the writing of the initial voltage into the first end of the light emitting module and enable the second potential control module to write the initial voltage into the second end of the first capacitor module; A light-emitting control module, wherein the first end of the light-emitting control module is connected to the second end of the driving module, the second end of the light-emitting control module is connected to the first end of the light-emitting module, and the third end of the light-emitting control module is connected to a transmission signal line for controlling the connection between the second end of the driving module and the first end of the light-emitting module.

2. A method for driving a pixel circuit, characterized in that: The pixel circuit as claimed in claim 1 comprises: In the threshold compensation stage, the first potential control module and the second potential control module are controlled to be turned on, and the first voltage source charges the first capacitor module to compensate for the threshold voltage of the driving module; In the data writing stage, the first potential control module, the second potential control module and the data writing module are controlled to be turned on, the data writing module writes the data voltage into the first end of the second capacitor module, the second end of the second capacitor module is coupled to the control end of the driving module to write the data voltage, and the first capacitor module is coupled to the control end of the driving module to write the threshold voltage; During the light-emitting phase in the display cycle, the light-emitting control module is controlled to be turned on, so that the driving module drives the light-emitting module to emit light according to the voltages at the control terminal and the second terminal.

3. The driving method of the pixel circuit according to claim 2, characterized in that: Before the threshold compensation stage, an initialization stage is also included: controlling the first potential control module, the second potential control module, the first initialization module, the second initialization module and the third initialization module to be turned on, the first initialization module writes the initial voltage into the first end of the second capacitor module, the second potential control module writes the initial voltage into the second end of the first capacitor module, and the third initialization module writes the initial voltage into the light-emitting module.

4. A display panel, characterized in that: The display panel includes a driving circuit and a pixel circuit connected to each other; Wherein, the pixel circuit is the pixel circuit described in claim 1.

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