Pixel circuit, driving method thereof and display panel

Abstract

The invention discloses a pixel circuit, a driving method thereof and a display panel. The pixel circuit comprises a driving module, a coupling module and a data writing module, wherein a first end of the coupling module is connected with a control end of the driving module; the first end of the data writing module is connected with the first end of the driving module, the first end of the data writing module is further connected with the second end of the coupling module, and the data writing module is used for transmitting data voltage to the second end of the coupling module. And the voltage containing data voltage information at the second end of the coupling module is coupled to the control end of the driving module through the coupling module. According to the technical scheme, the use performance of the display panel is improved.

Description

Technical Field

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

[0002] With the rapid development of display technology, display products formed by Organic Light-Emitting Diode (OLED) or Light-Emitting Diode (LED) are more and more widely used.

[0003] A display product includes a display panel, and there are problems that the performance of existing display panels needs to be improved. Summary of the Invention

[0004] The present invention provides a pixel circuit, a driving method thereof, and a display panel to improve the performance of the display panel.

[0005] According to an aspect of the present invention, a pixel circuit is provided. The pixel circuit includes:

[0006] A driving module;

[0007] A coupling module, a first end of the coupling module is connected to a control end of the driving module;

[0008] A data writing module, a first end of the data writing module is connected to a first end of the driving module, and the first end of the data writing module is also connected to a second end of the coupling module. The data writing module is configured to transmit a data voltage to the second end of the coupling module and couple, through the coupling module, a voltage containing data voltage information at the second end of the coupling module to the control end of the driving module.

[0009] Optionally, a control end of the data writing module is connected to a scanning line, and a second end of the data writing module is connected to a data line. The data writing module is configured to, in a data writing stage, be turned on in response to a scanning signal on the scanning line and transmit the data voltage on the data line to the second end of the coupling module;

[0010] Optionally, the pixel circuit further includes:

[0011] A threshold compensation module, the threshold compensation module is connected between the control end of the driving module and the second end of the driving module; the threshold compensation module is configured to be turned on in a compensation stage to perform threshold compensation on the driving module;

[0012] Optionally, a control terminal of the threshold compensation module is connected to a first control line, and the threshold compensation module is configured to conduct in response to a first control signal on the first control line during the compensation phase to perform threshold compensation on the driving module;

[0013] Optionally, the compensation phase is located before the data writing phase.

[0014] Optionally, the pixel circuit further includes:

[0015] A switch module, a first end of the switch module is connected to a first end of the data writing module, a second end of the switch module is connected to a second end of the coupling module, and a control terminal of the switch module is connected to the scan line or a second control line; the data writing module is configured to transmit the data voltage to the first end of the switch module during the data writing phase, and the switch module is configured to transmit the data voltage to the second end of the coupling module;

[0016] Optionally, a waveform of an active level of a second control signal on the second control line is the same as a waveform of an active level of a first control signal on the first control line; an active level of the second control signal on the second control line is delayed by one row time with respect to the active level of the first control signal on the first control line.

[0017] Optionally, the driving module includes a first transistor, a control electrode of the first transistor is connected to a first end of the coupling module, a first pole of the first transistor is connected to a first end of the data writing module, and a second pole of the first transistor is connected to the threshold compensation module;

[0018] Optionally, the threshold compensation module includes a second transistor, the second transistor is connected between a control terminal of the driving module and a second end of the driving module, and a control electrode of the second transistor is connected to the first control line;

[0019] Optionally, the switch module includes a third transistor, a first pole of the third transistor is connected to a first end of the data writing module, a second pole of the third transistor is connected to a second end of the coupling module, and a control electrode of the third transistor is connected to the scan line or the second control line;

[0020] Optionally, the data writing module includes a fourth transistor, a first pole of the fourth transistor is connected to a first end of the driving module, a second pole of the fourth transistor is connected to the data line, and a control electrode of the fourth transistor is connected to the scan line;

[0021] Optionally, the third transistor and the fourth transistor are of the same type, and a control electrode of the third transistor is connected to the scan line;

[0022] Alternatively, the type of the third transistor is the same as that of the second transistor, and the control electrode of the third transistor is connected to the second control line;

[0023] Optionally, the coupling module includes a first capacitor. A first pole of the first capacitor is connected to the control terminal of the driving module, and a second pole of the first capacitor is connected to the second terminal of the switching module;

[0024] Optionally, the first transistor is an N-type transistor;

[0025] Optionally, the second transistor is an N-type transistor.

[0026] Optionally, the pixel circuit further includes:

[0027] A light emission control module and a light emission module. The driving module, the light emission control module, and the light emission module are connected in series between a first power supply line and a second power supply line;

[0028] A switching module. A first terminal of the switching module is connected to a first terminal of the data writing module, a second terminal of the switching module is connected to a second terminal of the coupling module, and a control terminal of the switching module is connected to a scanning line or the second control line;

[0029] Optionally, the light emission control module includes a fifth transistor and a sixth transistor;

[0030] The fifth transistor is connected between the first power supply line and the second terminal of the driving module; the fifth transistor is used to conduct during a reset stage and a light emission stage;

[0031] The sixth transistor is connected between the first terminal of the driving module and the first terminal of the light emission module; the sixth transistor is used to conduct during the light emission stage;

[0032] The type of the fifth transistor is different from that of the sixth transistor. The control electrode of the fifth transistor is connected to the second control line, and the control electrode of the sixth transistor is connected to the fourth control line; or, the type of the fifth transistor is the same as that of the sixth transistor. The control electrode of the fifth transistor is connected to the third control line, and the control electrode of the sixth transistor is connected to the fifth control line;

[0033] The second terminal of the light emission module is connected to the second power supply line.

[0034] Optionally, the waveform of the active level of the third control signal on the third control line is the same as the waveform of the active level of the fifth control signal on the fifth control line; the active level of the third control signal on the third control line is delayed by one row time relative to the active level of the fifth control signal on the fifth control line.

[0035] Optionally, the pixel circuit further includes:

[0036] A threshold compensation module, which is connected between the control terminal of the driving module and the second terminal of the driving module; the threshold compensation module is used to conduct during the compensation phase to perform threshold compensation on the driving module;

[0037] The threshold compensation module includes a second transistor, and the type of the second transistor is different from the type of the fifth transistor;

[0038] Optionally, the light-emitting module includes an organic light-emitting diode, a first pole of the organic light-emitting diode is connected to the sixth transistor, and a second pole of the organic light-emitting diode is connected to the second power supply line;

[0039] Optionally, the reset phase is before the compensation phase.

[0040] Optionally, the pixel circuit further includes:

[0041] A first reset module and a light-emitting module, a first end of the first reset module is connected to a first reset signal line, and a second end of the first reset module is connected to a first end of the light-emitting module; a control terminal of the first reset module is connected to a sixth control line or a seventh control line; the first reset module is used to conduct during the reset phase, the compensation phase, and the data writing phase;

[0042] A second reset module, which is connected between the second end of the first reset module and the first end of the driving module, and a control terminal of the second reset module is connected to an eighth control line; the second reset module is used to conduct during the reset phase and the compensation phase;

[0043] Optionally, the threshold compensation module is further used to conduct during the reset phase.

[0044] Optionally, the pixel circuit further includes:

[0045] A second reset module, which is connected between a second reset signal line and the first end of the driving module, and a control terminal of the second reset module is connected to an eighth control line; the second reset module is used to transmit a second reset voltage on the second reset signal line to the first end of the driving module during the reset phase and the compensation phase;

[0046] Optionally, the threshold compensation module is further configured to conduct during the reset stage;

[0047] Optionally, the pixel circuit further includes:

[0048] A first reset module and a light-emitting module, a first end of the first reset module is connected to a first reset signal line, and a second end of the first reset module is connected to a first end of the light-emitting module; a control end of the first reset module is connected to a sixth control line or a seventh control line; the first reset module is configured to conduct during a reset stage, a compensation stage, and a data writing stage.

[0049] Optionally, the pixel circuit further includes:

[0050] A storage module, the storage module is connected between the second end of the first reset module and the second end of the coupling module; the storage module is configured to store the data voltage;

[0051] Optionally, the storage module includes a second capacitor, and the second capacitor is connected between the second end of the first reset module and the second end of the coupling module.

[0052] Optionally, a second end of the light-emitting module is connected to a second power supply line, and a first reset voltage on the first reset signal line is less than a sum of a second power supply voltage on the second power supply line and a turn-on voltage of the light-emitting module;

[0053] A second end of the driving module is connected to a first power supply line, and a second reset voltage is less than a difference between a first power supply voltage on the first power supply line and a threshold voltage of a transistor in the driving module;

[0054] Optionally, the second reset voltage is greater than the first reset voltage.

[0055] Optionally, the pixel circuit further includes a light-emitting control module; the light-emitting control module includes a fifth transistor and a sixth transistor; the fifth transistor is connected between a first power supply line and a second end of the driving module; the sixth transistor is connected between a first end of the driving module and a first end of the light-emitting module; a control electrode of the sixth transistor is connected to a fourth control line or a fifth control line;

[0056] The fourth control line is multiplexed as the sixth control line;

[0057] The fifth control line is multiplexed as the seventh control line;

[0058] Optionally, the pixel circuit further includes a threshold compensation module; a control end of the threshold compensation module is connected to a first control line, and the first control line is multiplexed as an eighth control line.

[0059] Optionally, the control electrode of the fifth transistor is connected to a third control line; the period during which the third control signal on the third control line is at an effective level overlaps partially with the period during which the first control signal on the first control line is at an effective level, and the overlapping duration is less than or equal to one row time; the effective level of the third control signal on the third control line is delayed by one row time relative to the effective level of the fifth control signal on the fifth control line;

[0060] Alternatively, the control electrode of the fifth transistor is connected to a second control line, and the effective level of the second control signal on the second control line is delayed by one row time relative to the effective level of the first control signal on the first control line;

[0061] Optionally, the conduction duration of the fifth transistor controlled by the third control signal during the reset stage is less than or equal to one row time;

[0062] Alternatively, the conduction duration of the second reset module controlled by the first control signal during the reset stage is less than or equal to one row time;

[0063] Optionally, the first reset module includes a seventh transistor, and the type of the seventh transistor is different from that of the sixth transistor.

[0064] Optionally, the control end of the data writing module is connected to a scanning line;

[0065] When the refresh frequency of the display panel corresponding to the pixel circuit is less than a preset frequency, the frequency of the effective level of the fourth control signal on the fourth control line is greater than the frequency of the effective level of the scanning signal on the scanning line;

[0066] The frequency of the effective level of the fifth control signal on the fifth control line is greater than the frequency of the effective level of the scanning signal on the scanning line;

[0067] The frequency of the effective level of the scanning signal on the scanning line is the same as the frequency of the effective level of the first control signal on the first control line;

[0068] When the refresh frequency of the display panel is greater than or equal to the preset frequency, the frequencies of the effective levels of the fourth control signal on the fourth control line, the scanning signal on the scanning line, and the first control signal on the first control line are all the same;

[0069] Optionally, when the refresh frequency of the display panel is less than a preset frequency, one display frame of the display panel corresponding to the pixel circuit includes a writing frame and a holding frame; the reset stage includes a first reset sub-stage located in the writing frame and a second reset sub-stage located in the holding frame; the first reset module is configured to conduct in response to the fourth control signal or the fifth control signal in the first reset sub-stage and the second reset sub-stage, and transmit a first reset voltage on the first reset signal line to a first end of the light-emitting module.

[0070] Optionally, the first reset module includes a seventh transistor, a first pole of the seventh transistor is connected to the first reset signal line, a second pole of the seventh transistor is connected to the first end of the light-emitting module, and a control pole of the seventh transistor is connected to the sixth control line or the seventh control line;

[0071] Optionally, the second reset module includes an eighth transistor, the eighth transistor is connected between the first end of the light-emitting module and the second end of the driving module, and a control pole of the eighth transistor is connected to an eighth control line;

[0072] Optionally, the eighth transistor is an N-type transistor.

[0073] Optionally, the first reset module includes a seventh transistor, a first pole of the seventh transistor is connected to the first reset signal line, a second pole of the seventh transistor is connected to the first end of the light-emitting module, and a control pole of the seventh transistor is connected to the sixth control line or the seventh control line;

[0074] Optionally, the second reset module includes an eighth transistor, the eighth transistor is connected between the second reset signal line and the first end of the driving module, and a control pole of the eighth transistor is connected to an eighth control line;

[0075] Optionally, the eighth transistor is an N-type transistor.

[0076] According to another aspect of the present invention, there is provided a driving method for a pixel circuit, the pixel circuit includes a driving module, a coupling module, and a data writing module, a first end of the coupling module is connected to a control end of the driving module; a first end of the data writing module is connected to a first end of the driving module, and the first end of the data writing module is further connected to a second end of the coupling module;

[0077] The driving method includes:

[0078] In the data writing stage, the data writing module is turned on to transmit a data voltage to the second end of the coupling module, and the voltage containing data voltage information at the second end of the coupling module is coupled to the control end of the driving module through the coupling module.

[0079] Optionally, the pixel circuit further includes: a threshold compensation module connected between the control end and the second end of the driving module;

[0080] Before the data writing stage, the driving method further includes:

[0081] In the compensation stage, the threshold compensation module is turned on to perform threshold compensation on the driving module;

[0082] Optionally, the pixel circuit further includes: a switch module, the first end of the switch module is connected to the first end of the data writing module, the second end of the switch module is connected to the second end of the coupling module, and the control end of the switch module is connected to a scan line or a second control line;

[0083] In the data writing stage, the data writing module is turned on to transmit a data voltage to the second end of the coupling module, including:

[0084] In the data writing stage, the data writing module is turned on to transmit a data voltage to the first end of the switch module, and the switch module is turned on to transmit the data voltage to the second end of the coupling module.

[0085] Optionally, the pixel circuit further includes a light emitting module, a first reset module, and a second reset module. The first end of the first reset module is connected to a first reset signal line, and the second end of the first reset module is connected to the first end of the light emitting module; the control end of the first reset module is connected to a sixth control line or a seventh control line; the second reset module is connected between the first end of the light emitting module and the second end of the driving module, and the control end of the second reset module is connected to an eighth control line;

[0086] Before the compensation stage, the driving method further includes:

[0087] In the reset stage, the first reset module is turned on to transmit a first reset voltage on the first reset signal line to the second reset module, and the second reset module is turned on to transmit the first reset voltage to the first end of the driving module;

[0088] Optionally, in the compensation stage, the driving method further includes:

[0089] The first reset module is turned on to transmit the first reset voltage on the first reset signal line to the second reset module, and the second reset module is turned on to transmit the first reset voltage to the second end of the driving module;

[0090] Optionally, in the data writing stage, the driving method further includes:

[0091] The first reset module is turned on to transmit the first reset voltage to the first end of the light-emitting module;

[0092] Optionally, after the data writing stage, the driving method further includes:

[0093] In the light-emitting stage, the driving module generates a driving current to drive the light-emitting module to emit light.

[0094] According to another aspect of the present invention, a display panel is provided, and the display panel includes the pixel circuit according to any embodiment of the present invention.

[0095] The technical solution of the embodiment of the present invention realizes the direct writing of the data voltage by transmitting the data voltage to the second end of the coupling module when the data writing module is turned on, and the coupling module couples the voltage containing the data voltage information at the second end of the coupling module to the control end of the driving module, without passing through the driving module, which can effectively reduce the required time for data writing, so as to be easily applied to a display panel with a higher refresh rate. Moreover, when writing data, without passing through the driving module and the threshold compensation module, the data writing stage and the threshold compensation stage can be separated, which can ensure the effect of threshold compensation, so that the driving current generated by the driving module is independent of the threshold voltage of the transistor in the driving module. At the same gray level, the driving currents generated by different driving modules tend to be consistent, thereby improving the display uniformity of the display panel corresponding to the pixel circuit, and further improving the display effect of the display panel and the use performance of the display panel.

[0096] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0098] Figure 1It is a schematic structural diagram of a pixel circuit provided by an embodiment of the present invention;

[0099] Figure 2 It is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention;

[0100] Figure 3 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0101] Figure 4 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0102] Figure 5 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0103] Figure 6 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0104] Figure 7 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0105] Figure 8 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0106] Figure 9 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0107] Figure 10 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0108] Figure 11 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0109] Figure 12 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0110] Figure 13 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0111] Figure 14 It is a schematic structural diagram of yet another pixel circuit provided by an embodiment of the present invention;

[0112] Figure 15 It is a timing diagram of a pixel circuit provided by an embodiment of the present invention;

[0113] Figure 16 It is a timing diagram of another pixel circuit provided by an embodiment of the present invention;

[0114] Figure 17It is a timing diagram of another pixel circuit provided by an embodiment of the present invention;

[0115] Figure 18 It is a flowchart of a driving method of a pixel circuit provided by an embodiment of the present invention;

[0116] Figure 19 It is a flowchart of another driving method of a pixel circuit provided by an embodiment of the present invention;

[0117] Figure 20 It is a flowchart of yet another driving method of a pixel circuit provided by an embodiment of the present invention;

[0118] Figure 21 It is a schematic structural diagram of a display panel provided by an embodiment of the present invention. Detailed implementation manners

[0119] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0120] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily need to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0121] As mentioned in the background art, there are problems with the performance of existing display panels that need to be improved. Through research by the inventor, it is found that the reason for this problem is that an active matrix organic light-emitting diode display device emits light through a current-driven method. The display device includes a display panel, and the display panel includes a pixel circuit and a light-emitting element. The pixel circuit is used to generate a driving current to drive the light-emitting element to emit light. The pixel circuit includes a driving transistor, and the driving transistor is used to generate a driving current. Therefore, the device electrical properties of the driving transistor in the pixel circuit will directly affect the grayscale brightness difference of the display device. When the device electrical properties of the driving transistors in different pixel circuits vary too much, it is easy to cause uneven image quality, such as the occurrence of mura (i.e., uneven brightness of the display, resulting in various traces) phenomena. In related display devices, the brightness uniformity of the entire display screen can be improved by internally compensating the threshold voltage of the driving transistor in the pixel circuit.

[0122] However, in related technologies, threshold compensation is performed on the driving transistor while data is being written, that is, the threshold compensation stage and the data writing stage are the same stage. As a result, the duration of internal compensation for the threshold voltage is easily affected by the resolution and refresh rate of the display panel, which may lead to problems of insufficient compensation, thereby affecting the display effect of the display panel and resulting in a poor usage effect of the display panel.

[0123] In view of the above technical problems, an embodiment of the present invention provides a pixel circuit. Figure 1 is a schematic structural diagram of a pixel circuit provided by an embodiment of the present invention. Refer to Figure 1 , the pixel circuit includes:

[0124] a driving module 110;

[0125] a coupling module 120, the first end of the coupling module 120 is connected to the control end of the driving module 110;

[0126] a data writing module 130, the first end of the data writing module 130 is connected to the first end of the driving module 110, and the first end of the data writing module 130 is also connected to the second end of the coupling module 120. The data writing module 130 is used to transmit a data voltage to the second end of the coupling module 120 and couple the voltage containing data voltage information at the second end of the coupling module 120 to the control end of the driving module 110 through the coupling module 120.

[0127] Specifically, the driving module 110 can generate a driving current. When turned on, the data writing module 130 can transmit a data voltage to the second end of the coupling module 120. The coupling module 120 can couple the voltage containing data voltage information at the second end of the coupling module 120 to the first end of the coupling module 120, that is, to the control end of the driving module 110, thereby realizing the writing of the data voltage. In this way, the direct writing of the data voltage is realized without passing through the driving module 110, which can effectively reduce the required time for data writing, so as to be easily applied to a display panel with a higher refresh rate. Moreover, when writing data, without passing through the driving module 110 and the threshold compensation module, the data writing stage and the threshold compensation stage can be separated. Then, when the refresh rate of the display panel is relatively high, a relatively long threshold compensation time can still be set, thereby improving the threshold compensation effect. In this way, the driving current generated by the driving module 110 is independent of the threshold voltage of the transistors in the driving module 110, so the element electrical properties of the transistors in the driving module 110 will not affect the grayscale brightness difference of the display device. That is, at the same grayscale, the driving currents generated by different driving modules 110 tend to be consistent, thereby improving the display uniformity of the display panel corresponding to the pixel circuit, and further improving the display effect of the display panel and the service performance of the display panel. Furthermore, the direct writing of the data voltage can avoid the mischarging phenomenon.

[0128] Based on the technical solution of this embodiment, when the data writing module is turned on, the data voltage is transmitted to the second end of the coupling module. The coupling module couples the voltage containing data voltage information at the second end of the coupling module to the control end of the driving module, realizing the direct writing of the data voltage without passing through the driving module, which can effectively reduce the required time for data writing, so as to be easily applied to a display panel with a higher refresh rate. Moreover, when writing data, without passing through the driving module and the threshold compensation module, the data writing stage and the threshold compensation stage can be separated, which can ensure the threshold compensation effect, making the driving current generated by the driving module independent of the threshold voltage of the transistors in the driving module. At the same grayscale, the driving currents generated by different driving modules tend to be consistent, thereby improving the display uniformity of the display panel corresponding to the pixel circuit, and further improving the display effect of the display panel and the service performance of the display panel.

[0129] Based on the above technical solution, Figure 2 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention. Optionally, referring to Figure 2 , the control end of the data writing module 130 is connected to the scan line Scan, and the second end of the data writing module 130 is connected to the data line Data. The data writing module 130 is configured to be turned on in response to a scan signal on the scan line Scan during the data writing stage, and transmit the data voltage on the data line Data to the second end of the coupling module 120.

[0130] Specifically, the scan signal on the scan line Scan can control the conduction or cut-off of the data writing module 130. During the data writing phase, the scan signal on the scan line Scan can control the data writing module 130 to conduct, so that the data writing module 130 transmits the data voltage on the data line Data to the second end of the coupling module 120. Moreover, the data writing phase is a separate phase, and the data writing phase can be separated from the threshold compensation phase, which is convenient for separately controlling the duration of the threshold compensation phase.

[0131] Optionally, refer to Figure 2 , the pixel circuit further includes:

[0132] A threshold compensation module 140, which is connected between the control end of the driving module 110 and the second end of the driving module 110; the threshold compensation module 140 is used to conduct during the compensation phase to perform threshold compensation on the driving module 110.

[0133] Specifically, the compensation phase is the threshold compensation phase. During the compensation phase, the threshold compensation module 140 conducts to perform threshold compensation on the driving module 110. Thus, the compensation phase and the data writing phase are separated, so that the duration of the compensation phase can be separately controlled. When the refresh frequency of the display panel corresponding to the pixel circuit is relatively high, a longer compensation time can also be set, thereby ensuring the threshold compensation effect, so that the driving current generated by the driving module 110 is independent of the threshold voltage of the transistor in the driving module 110. Then, the element electrical properties of the transistors in the driving module 110 will not affect the grayscale brightness difference of the display device. That is, at the same grayscale, the driving currents generated by different driving modules 110 tend to be consistent, thereby improving the display uniformity of the display panel corresponding to the pixel circuit.

[0134] Optionally, refer to Figure 2 , the control end of the threshold compensation module 140 is connected to the first control line EMB1, and the threshold compensation module 140 is used to conduct in response to the first control signal on the first control line EMB1 during the compensation phase to perform threshold compensation on the driving module 110.

[0135] Specifically, in the compensation stage, the first control signal on the first control line EMB1 controls the threshold compensation module 140 to conduct, facilitating the charging or discharging of the first end of the coupling module 120 through the threshold compensation module 140 and the driving module 110, so that the voltage at the first end of the coupling module 120 is a voltage related to the threshold voltage of the transistor in the driving module 110, that is, the voltage at the control end of the driving module 110 is a voltage related to the threshold voltage of the transistor in the driving module 110, making the voltage difference Vgs between the control end and the first end of the driving module 110 a voltage related to the threshold voltage Vth of the transistor in the driving module 110. The driving current generated by the driving module 110 is related to the difference between Vgs (the voltage difference between the control end and the first end of the driving module 110) and the threshold voltage Vth of the transistor in the driving module 110. Thus, the threshold voltage can be eliminated, making the driving current independent of the threshold voltage of the transistor in the driving module 110, and achieving threshold compensation for the driving module 110.

[0136] Optionally, the compensation stage is located before the data writing stage. In this way, the compensation stage and the data writing stage can be separated, enabling the duration of the compensation stage to be controlled independently. When the refresh frequency of the display panel corresponding to the pixel circuit is relatively high, a longer compensation time can also be set to ensure the threshold compensation effect.

[0137] Based on the above technical solution, Figure 3 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention. Optionally, referring to Figure 3 , the pixel circuit further includes:

[0138] A switch module 150, the first end of the switch module 150 is connected to the first end of the data writing module 130, the second end of the switch module 150 is connected to the second end of the coupling module 120, and the control end of the switch module 150 is connected to the scan line Scan or the second control line EMB2; the data writing module 130 is configured to transmit a data voltage to the first end of the switch module 150 during the data writing stage, and the switch module 150 is configured to transmit the data voltage to the second end n of the coupling module 120.

[0139] Specifically, the scan signal on the scan line Scan or the second control signal on the second control line EMB2 can control the on or off (i.e., turn-off) of the switch module 150. During the data writing phase, the scan signal on the scan line Scan controls the conduction of the data writing module 130, and the scan signal on the scan line Scan or the second control signal on the second control line EMB2 controls the conduction of the switch module 150, so that the data writing module 130 transfers the data voltage on the data line Data to the first end of the switch module 150 (i.e., the first end s of the driving module 110), and the switch module 150 transfers the data voltage to the second end n of the coupling module 120, facilitating the coupling module 120 to couple the voltage containing data voltage information at the second end of the coupling module 120 to the control end g of the driving module 110.

[0140] Moreover, when writing data, there is only one switch module 150 between the data writing module 130 and the coupling module 120. The equivalent resistance of the switch module 150 is small, which can effectively reduce the time required for data writing and facilitate the pixel circuit to be applied to a display panel with a higher refresh rate.

[0141] Optionally, the waveform of the effective level of the second control signal on the second control line EMB2 is the same as the waveform of the effective level of the first control signal on the first control line EMB1; the effective level of the second control signal on the second control line EMB2 is delayed by one row time relative to the effective level of the first control signal on the first control line EMB1.

[0142] Among them, one row time can be calculated according to the resolution and refresh rate of the display panel. According to the resolution, the number of rows of the pixel circuit can be determined, so one row time is

[0143] Specifically, the display panel formed by the pixel circuit includes a plurality of cascaded first shift registers. The first shift registers can be connected to the scan line Scan, and the first shift registers output scan signals. The display panel corresponding to the pixel circuit further includes a plurality of cascaded second shift registers. The plurality of pixel circuits in the display panel are arranged in an array. The second control line EMB2 and the first control line EMB1 extend in the row direction. One second control line EMB2 is correspondingly connected to one row of pixel circuits, and one first control line EMB1 is correspondingly connected to one row of pixel circuits. For example, the m-th stage second shift register is connected to the first control line EMB1 corresponding to the m-th row of pixel circuits and is connected to the second control line EMB2 corresponding to the (m - 1)-th row of pixel circuits. Alternatively, the m-th stage second shift register is connected to the first control line EMB1 corresponding to the (m + 1)-th row of pixel circuits and is connected to the second control line EMB2 corresponding to the m-th row of pixel circuits. This enables the second control line EMB2 and the first control line EMB1 to share a set of second shift registers, thereby reducing the number of shift registers and facilitating the realization of a narrow border. Here, m is an integer greater than 1.

[0144] Based on the above technical solution, the possible structures of each module will be described below, but this is not a limitation to the present application.

[0145] Figure 4 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention. Figure 5 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention. Optionally, referring to Figure 4 or Figure 5 , the driving module 110 includes a first transistor T1. The control electrode g of the first transistor T1 is connected to the first end of the coupling module 120. The first electrode s of the first transistor T1 is connected to the first end of the data writing module 130. The second electrode d of the first transistor T1 is connected to the threshold compensation module 140.

[0146] Among them, the first electrode s of the first transistor T1 is the source electrode, and the second electrode d of the first transistor T1 is the drain electrode. Alternatively, the first electrode of the first transistor T1 is the drain electrode d, and the second electrode of the first transistor T1 is the source electrode s. This embodiment does not make a limitation. The first transistor T1 can generate a driving current to drive the corresponding light-emitting module to emit light.

[0147] Optionally, referring to Figure 4 or Figure 5 , the threshold compensation module 140 includes a second transistor T2. The second transistor T2 is connected between the control terminal g and the second terminal d of the driving module 110, and the control electrode of the second transistor T2 is connected to the first control line EMB1.

[0148] Among them, the first pole of the second transistor T2 is the source electrode, and the second pole of the second transistor T2 is the drain electrode, or the first pole of the second transistor T2 is the drain electrode, and the second pole of the second transistor T2 is the source electrode. This embodiment does not make a limitation. When the first control line EMB1 controls the second transistor T2 to conduct, it is convenient to perform threshold compensation on the driving module 110.

[0149] Optionally, refer to Figure 4 or Figure 5 , the switching module 150 includes a third transistor T3. The first pole of the third transistor T3 is connected to the first end of the data writing module 130, the second pole of the third transistor T3 is connected to the second end n of the coupling module 120, and the control pole of the third transistor T3 is connected to the scan line Scan or the second control line EMB2.

[0150] Among them, the first pole of the third transistor T3 is the source electrode, and the second pole of the third transistor T3 is the drain electrode, or the first pole of the third transistor T3 is the drain electrode, and the second pole of the third transistor T3 is the source electrode. This embodiment does not make a limitation. When the scan signal on the scan line Scan or the second control signal on the second control line EMB2 controls the third transistor T3 to conduct, the third transistor T3 can transmit the data voltage at the first end of the data writing module 130 to the second end n of the coupling module 120, which is convenient for the coupling module 120 to couple the voltage related to the data voltage at the second end n of the coupling module 120 to the control terminal g of the driving module 110.

[0151] Optionally, refer to Figure 4 or Figure 5 , the data writing module 130 includes a fourth transistor T4. The first pole of the fourth transistor T4 is connected to the first end s of the driving module 110, the second pole of the fourth transistor T4 is connected to the data line Data, and the control pole of the fourth transistor T4 is connected to the scan line Scan.

[0152] Among them, the first pole of the fourth transistor T4 is the source electrode, and the second pole of the fourth transistor T4 is the drain electrode, or the first pole of the fourth transistor T4 is the drain electrode, and the second pole of the fourth transistor T4 is the source electrode. This embodiment does not make a limitation. The fourth transistor T4 can be an N-type transistor or a P-type transistor. Figure 4 and Figure 5The case where the fourth transistor T4 is a P-type transistor is shown, but it is not limited thereto. During the data writing stage, when the scanning signal on the scanning line Scan controls the fourth transistor T4 to conduct, the fourth transistor T4 can transfer the data voltage on the data line Data to the first end s of the driving module 110. The data writing stage is a separate stage, and the duration for which the scanning signal on the scanning line Scan controls the fourth transistor T4 in a row of pixel circuits to conduct can be greater than or equal to one line time, which can increase the data writing time and ensure that the data voltage is written to the first pole s of the first transistor T1.

[0153] In one embodiment, referring to Figure 4 , the type of the third transistor T3 is the same as that of the fourth transistor T4, and the control pole of the third transistor T3 is connected to the scanning line Scan. For example, both the third transistor T3 and the fourth transistor T4 are P-type transistors, which can achieve the sharing of the scanning line Scan, reduce the number of signal lines, is beneficial to reducing the occupied space, and is convenient for improving the pixel density of the display panel corresponding to the pixel circuit.

[0154] In another embodiment, referring to Figure 5 , the type of the third transistor T3 is the same as that of the second transistor T2, and the control pole of the third transistor T3 is connected to the second control line EMB2. For example, both the second transistor T2 and the third transistor T3 are N-type transistors, the control pole of the third transistor T3 is connected to the second control line EMB2, and the waveform of the effective level of the second control signal on the second control line EMB2 is the same as the waveform of the effective level of the first control signal on the first control line EMB1; the effective level of the second control signal on the second control line EMB2 is delayed by one line time relative to the effective level of the first control signal on the first control line EMB1, so that the first control line EMB1 and the second control line EMB2 can share a set of shift registers (the second shift register), which is beneficial to realizing the narrow border of the display panel.

[0155] Optionally, referring to Figure 4 or Figure 5 , the coupling module 120 includes a first capacitor C1. The first pole of the first capacitor C1 is connected to the control terminal g of the driving module 110, and the second pole n of the first capacitor C1 is connected to the second end of the switch module 150. Since the first capacitor C1 can store voltage, that is, the voltage difference between the two ends of the first capacitor C1 remains unchanged. When the voltage at the second pole n of the first capacitor C1 changes, the first pole of the first capacitor C1 also changes. Thus, after the data voltage is written to the second pole n of the first capacitor C1, the first capacitor C1 can couple the voltage containing the data voltage information at the second pole n of the first capacitor C1 to the first pole of the first capacitor C1, that is, couple it to the control terminal g of the driving module 110, thereby realizing the writing of the data voltage.

[0156] Optionally, refer to Figure 4 or Figure 5 , the first transistor T1 is an N-type transistor. The first transistor T1 can be an oxide transistor, such as an indium gallium zinc oxide (IGZO) transistor or an indium zinc oxide (IZO) transistor, which is not limited in this embodiment.

[0157] Optionally, refer to Figure 4 or Figure 5 , the second transistor T2 is an N-type transistor. The second transistor T2 can be an oxide transistor, such as an indium gallium zinc oxide (IGZO) transistor or an indium zinc oxide (IZO) transistor, which is not limited in this embodiment. By setting the second transistor T2 as an N-type transistor, the leakage current of the control terminal g of the driving module 110 can be reduced, so that the driving module 110 can generate a stable driving current.

[0158] Based on the above technical solutions, the possible structures of the pixel circuit will be described below, but it is not a limitation to the present application.

[0159] Figure 6 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention. Optionally, refer to Figure 6 , the pixel circuit further includes:

[0160] a light emission control module 160 and a light emission module 170, the driving module 110, the light emission control module 160, and the light emission module 170 are connected in series between the first power supply line VDD and the second power supply line VSS;

[0161] a switch module 150, the first end of the switch module 150 is connected to the first end of the data writing module 130, the second end of the switch module 150 is connected to the second end of the coupling module 120, and the control end of the switch module 150 is connected to the scan line Scan or the second control line EMB2.

[0162] Among them, the light emission module 170 can include an organic light emitting diode.

[0163] Specifically, the light emission control module 160 can control whether the driving module 110 generates a driving current. In the light emission stage, the light emission control module 160 is turned on, so that the first power supply line VDD, the light emission control module 160, the driving module 110, the light emission module 170, and the second power supply line VSS form a current loop, which is convenient for the driving module 110 to generate a driving current, and the light emission module 170 emits light in response to the driving current.

[0164] Figure 7 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention. Figure 8This is another schematic structural diagram of a pixel circuit provided by an embodiment of the present invention. Optionally, referring to Figure 7 or Figure 8 , the light emission control module 160 includes a fifth transistor T5 and a sixth transistor T6;

[0165] The fifth transistor T5 is connected between the first power supply line VDD and the second end of the driving module 110; the fifth transistor T5 is used to conduct during the reset stage and the light emission stage;

[0166] The sixth transistor T6 is connected between the first end of the driving module 110 and the first end of the light emission module 170; the sixth transistor T6 is used to conduct during the light emission stage;

[0167] Referring to Figure 7 , the type of the fifth transistor T5 is different from that of the sixth transistor T6. The control electrode of the fifth transistor T5 is connected to the second control line EMB2, and the control electrode of the sixth transistor T6 is connected to the fourth control line EM0; or, referring to Figure 8 , the type of the fifth transistor T5 is the same as that of the sixth transistor T6. The control electrode of the fifth transistor T5 is connected to the third control line EM2, and the control electrode of the sixth transistor is connected to the fifth control line EM1;

[0168] The second end of the light emission module 170 is connected to the second power supply line VSS.

[0169] Among them, the first power supply line VDD can transmit a first power supply voltage, and the second power supply line VSS can transmit a second power supply voltage. The first power supply voltage is a positive voltage, and the second power supply voltage is zero or a negative voltage; or, the first power supply voltage is zero or a negative voltage, and the second power supply voltage is a positive voltage.

[0170] Specifically, during the reset stage, the fifth transistor T5 conducts, and the fifth transistor T5 transmits the first power supply voltage to the second end d of the driving module 110. If the threshold compensation module 140 conducts, the first power supply voltage can charge the first end of the coupling module 120 through the threshold compensation module 140, facilitating the reset of the control end g of the driving module 110, facilitating the conduction of the driving module 110, and facilitating subsequent threshold compensation.

[0171] During the light emission stage, the fifth transistor T5 and the sixth transistor T6 conduct, so that the first power supply line VDD, the fifth transistor T5, the driving module 110, the sixth transistor T6, the light emission module 170, and the second power supply line VSS can form a current loop, enabling the driving module 110 to generate a driving current.

[0172] In some embodiments, such as Figure 7As shown, the type of the fifth transistor T5 is different from that of the sixth transistor T6. For example, the fifth transistor T5 is a P-type transistor, and the sixth transistor T6 is an N-type transistor. The control electrode of the fifth transistor T5 is connected to the second control line EMB2, and the control electrode of the sixth transistor T6 is connected to the fourth control line EM0, such that the fifth transistor T5 and the switch module 150 can share the second control line EMB2, which is beneficial to reducing the number of signal lines, occupying less space, and facilitating the improvement of the pixel density of the display panel.

[0173] In some embodiments, as Figure 8 shown, the type of the fifth transistor T5 is the same as that of the sixth transistor T6. For example, both the fifth transistor T5 and the sixth transistor T6 are P-type transistors. The control electrode of the fifth transistor T5 is connected to the third control line EM2, and the control electrode of the sixth transistor is connected to the fifth control line EM1.

[0174] Optionally, the waveform of the effective level of the third control signal on the third control line EM2 is the same as the waveform of the effective level of the fifth control signal on the fifth control line EM1; the effective level of the third control signal on the third control line EM2 is delayed by one line time relative to the effective level of the fifth control signal on the fifth control line EM1.

[0175] Exemplarily, the display panel corresponding to the pixel circuit further includes a plurality of cascaded third shift registers. For example, the m-th stage third shift register is connected to the fifth control line EM1 corresponding to the m-th row pixel circuit and is connected to the third control line EM2 corresponding to the (m - 1)-th row pixel circuit, or the m-th stage second shift register is connected to the fifth control line EM1 corresponding to the (m + 1)-th row pixel circuit and is connected to the third control line EM2 corresponding to the m-th row pixel circuit. Such that the third control line EM2 and the fifth control line EM1 share a set of shift registers, thereby reducing the number of shift registers, which is beneficial to achieving a narrow border. Wherein, m is an integer greater than 1.

[0176] Based on the above technical solutions, optionally, referring to Figure 7 or Figure 8 , the pixel circuit further includes:

[0177] A threshold compensation module 140, which is connected between the control terminal of the driving module 110 and the second terminal of the driving module 110; the threshold compensation module 140 is used to conduct during the compensation stage to perform threshold compensation on the driving module;

[0178] The threshold compensation module 140 includes a second transistor T2, and the type of the second transistor T2 is different from that of the fifth transistor T5.

[0179] Exemplarily, as Figure 7 or Figure 8As shown, the second transistor T2 is an N-type transistor, which can reduce the leakage current of the control terminal of the driving module 110, and the fifth transistor T5 is a P-type transistor, which can reduce the cost.

[0180] Optionally, referring to Figure 7 or Figure 8 , the light-emitting module 170 includes an organic light-emitting diode D1. The first electrode of the organic light-emitting diode D1 is connected to the sixth transistor T6, and the second electrode of the organic light-emitting diode D1 is connected to the second power supply line VSS. Among them, the first electrode of the organic light-emitting diode D1 is the anode, and the second electrode of the organic light-emitting diode D1 is the cathode; or, the first electrode of the organic light-emitting diode D1 is the cathode, and the second electrode of the organic light-emitting diode D1 is the anode. This embodiment does not make a limitation. The organic light-emitting diode D1 can emit light in response to the driving current generated by the corresponding driving module 110.

[0181] Optionally, referring to Figure 7 or Figure 8 , the reset stage is located before the compensation stage. Such a setting can reset the control terminal g of the driving module 110 before threshold compensation of the driving module 110, avoiding the influence of the residual charge of the previous frame on threshold compensation and light emission. And it can ensure that the driving module 110 is controlled to conduct in the reset stage before the compensation stage, which is convenient for threshold compensation of the driving module 110 in the compensation stage.

[0182] Next, the possible structures included in the pixel circuit will be described, but it does not limit the present application.

[0183] In one implementation manner, Figure 9 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention. Optionally, referring to Figure 9 , the pixel circuit further includes:

[0184] A first reset module 180 and a light-emitting module 170. The first end of the first reset module 180 is connected to the first reset signal line Vref1, and the second end of the first reset module 180 is connected to the first end of the light-emitting module 170; the control terminal of the first reset module 180 is connected to the sixth control line EM01 or the seventh control line EM11; the first reset module 180 is used to conduct in the reset stage, compensation stage, and data writing stage;

[0185] A second reset module 190, which is connected between the second end of the first reset module 180 and the first end s of the driving module 110. The control terminal of the second reset module 190 is connected to the eighth control line EMB11; the second reset module 190 is used to conduct in the reset stage and compensation stage.

[0186] Specifically, in the reset stage, the first reset module 180 is turned on. The first reset module 180 transmits the first reset voltage on the first reset signal line Vref1 to the first end of the light-emitting module 170 to reset the first end of the light-emitting module 170. Moreover, the second reset module 190 is turned on. The second reset module 190 can transmit the first reset voltage at the first end of the light-emitting module 170 to the first end s of the driving module 110 to reset the first end s of the driving module 110. And the voltage at the first end s of the driving module 110 is made smaller, facilitating the conduction of the driving module 110. In the compensation stage, the driving module 110, the threshold compensation module 140, the first reset module 180, and the second reset module 190 are turned on, so that the first end of the coupling module 120 discharges through the threshold compensation module 140, the driving module 110, the second reset module 190, and the first reset module 180 until the voltage at the control terminal g of the driving module 110 is the sum of the first reset voltage and the threshold voltage of the transistor in the driving module 110, and the driving module 110 is turned off. Thus, the voltage at the control terminal of the driving module 110 is a voltage related to the threshold voltage of the transistor in the driving module 110, achieving threshold compensation.

[0187] Moreover, the first reset module 180 is turned on during the data writing stage to maintain the voltage at the first end of the light-emitting module 170.

[0188] Optionally, the threshold compensation module 140 is also used to be turned on during the reset stage. In this way, during the reset stage, the first power supply voltage on the first power supply line VDD charges the first end of the coupling module 120 through the fifth transistor T5 in the light-emitting control module 160 and the threshold compensation module 140, making the voltage at the control terminal g of the driving module 110 larger, while the voltage at the first end s of the driving module 110 is smaller, so that the voltage difference between the control terminal g and the first end s of the driving module 110 meets the conduction condition of the driving module 110, enabling the driving module 110 to be turned on, which facilitates the threshold compensation for the driving module 110 in the subsequent compensation stage.

[0189] In another embodiment, Figure 10 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention. Optionally, referring to Figure 10 , the pixel circuit further includes:

[0190] A second reset module 190, which is connected between the second reset signal line Vref2 and the first end of the driving module 110. The control terminal of the second reset module 190 is connected to the eighth control line EMB11. The second reset module 190 is used to transmit the second reset voltage on the second reset signal line Vref2 to the first end s of the driving module 110 during the reset stage and the compensation stage.

[0191] Specifically, in the reset stage, the second reset module 190 transmits the second reset voltage on the second reset signal line Vref2 to the first end s of the driving module 110 to reset the first end s of the driving module 110. And the voltage of the first end s of the driving module 110 is made smaller, which is convenient for making the voltage difference between the control end g and the first end s of the driving module 110 meet the conduction condition of the driving module 110, so that the driving module 110 can conduct in the compensation stage, which is convenient for threshold compensation of the driving module 110. In the compensation stage, the driving module 110, the threshold compensation module 140 and the second reset module 190 conduct, so that the first end of the coupling module 120 discharges through the threshold compensation module 140, the driving module 110 and the second reset module 190 until the voltage of the control end g of the driving module 110 is the sum of the second reset voltage and the threshold voltage of the transistor in the driving module 110, and the driving module 110 turns off, so that the voltage of the control end of the driving module 110 is a voltage related to the threshold voltage of the transistor in the driving module 110, realizing threshold compensation.

[0192] Optionally, the threshold compensation module 140 is also used to conduct in the reset stage. In this way, in the reset stage, the first power supply voltage on the first power supply line VDD charges the first end of the coupling module 120 through the fifth transistor T5 in the light emission control module 160 and the threshold compensation module 140, making the voltage of the control end g of the driving module 110 larger, while the voltage of the first end s of the driving module 110 is smaller, so that the voltage difference between the control end g and the first end s of the driving module 110 meets the conduction condition of the driving module 110, then the driving module 110 can be made to conduct, which is convenient for threshold compensation of the driving module 110 in the subsequent compensation stage.

[0193] Optionally, referring to Figure 10 , the pixel circuit further includes:

[0194] A first reset module 180 and a light emission module 170. The first end of the first reset module 180 is connected to the first reset signal line Vref1, and the second end of the first reset module 180 is connected to the first end of the light emission module 170; the control end of the first reset module 180 is connected to the sixth control line EM01 or the seventh control line EM11; the first reset module 180 is used to conduct in the reset stage, the compensation stage and the data writing stage.

[0195] Specifically, in the reset stage, the compensation stage and the data writing stage, the first reset module 180 conducts, and the first reset module 180 transmits the first reset voltage on the first reset signal line Vref1 to the first end of the light emission module 170 to reset the first end of the light emission module 170.

[0196] Optionally, referring toFigure 9 or Figure 10 The pixel circuit further includes:

[0197] A storage module 191, connected between the second end of the first reset module 180 and the second end n of the coupling module 120; the storage module 191 is used for storing a data voltage.

[0198] Specifically, for example, the first end of the storage module 191 is connected to the second end of the coupling module 120, and the second end of the storage module 191 is connected to the second end of the first reset module 180. In the data writing stage, the data writing module 130 transmits the data voltage Vdata to the first end s of the driving module 110, and the switching module 150 transmits the data voltage Vdata to the second end n of the coupling module 120, that is, the voltage at the first end of the storage module 191 is the data voltage Vdata, that is, Vn = Vdata. Since the first reset module 180 transmits the first reset voltage to the second end of the storage module 191 to maintain the voltage at the second end of the storage module 191, the storage module 191 stores the data voltage Vdata, which facilitates the coupling module 120 to couple the voltage related to the data voltage Vdata to the control end g of the driving module 110.

[0199] Based on the above technical solution, Figure 11 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention, Figure 12 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention, Figure 13 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention, Figure 14 is a schematic structural diagram of another pixel circuit provided by an embodiment of the present invention. Optionally, referring to Figure 11 、 Figure 12 、 Figure 13 or Figure 14 , the storage module 191 includes a second capacitor C2, and the second capacitor C2 is connected between the second end of the first reset module 180 and the second end of the coupling module 120. The second capacitor C2 can store the data voltage.

[0200] Optionally, referring to Figure 10 , the second end of the light emitting module 170 is connected to the second power supply line VSS, and the first reset voltage on the first reset signal line is less than the sum of the second power supply voltage on the second power supply line VSS and the turn-on voltage of the light emitting module 170;

[0201] The second end d of the driving module 110 is connected to the first power supply line VDD, and the second reset voltage is less than the difference between the first power supply voltage on the first power supply line VDD and the threshold voltage of the transistor in the driving module 110.

[0202] Specifically, the first reset voltage is less than the sum of the second power supply voltage on the second power supply line VSS and the conduction voltage of the light-emitting module 170, that is, the difference between the first reset voltage and the second power supply voltage is less than the conduction voltage of the light-emitting module 170, so that the light-emitting module 170 does not emit light before the light-emitting stage (reset stage, compensation stage, and data writing stage).

[0203] For example, the transistor in the driving module 110 is an N-type transistor. The second reset voltage is less than the difference between the first power supply voltage and the threshold voltage of the transistor in the driving module 110, that is, the first power supply voltage is greater than the sum of the second reset voltage and the threshold voltage of the transistor in the driving module 110, so that in the reset stage, the voltage Vg at the control terminal of the driving module 110 is greater than the sum of the second reset voltage Vr2 and the threshold voltage Vth of the transistor in the driving module 110, that is, Vg > Vr2 + Vth, which can ensure that the driving module 110 is turned on, facilitating subsequent threshold compensation for the driving module 110.

[0204] Optionally, the second reset voltage is greater than the first reset voltage. For example, the first power supply voltage is greater than the second power supply voltage, the second reset voltage is less than the difference between the first power supply voltage and the threshold voltage of the transistor in the driving module 110, and the first reset voltage is less than the sum of the second power supply voltage and the conduction voltage of the light-emitting module 170, then the second reset voltage does not need to be too small, that is, the second reset voltage can be greater than the first reset voltage. The larger second reset voltage makes the difference between the second reset voltage and the first power supply voltage not too large, so that after the driving module 110 is turned on in the reset stage, the current among the first power supply line, the light-emitting control module 160, the driving module 110, and the second reset module 190 is small, which can reduce power consumption waste.

[0205] Based on the above technical solution, optionally, the pixel circuit further includes a light-emitting control module 160; the light-emitting control module 160 includes a fifth transistor T5 and a sixth transistor T6; the fifth transistor T5 is connected between the first power supply line VDD and the second terminal d of the driving module 110; the sixth transistor T6 is connected between the first terminal of the driving module 110 and the first terminal of the light-emitting module 170; the control electrode of the sixth transistor T6 is connected to the fourth control line EM0 or the fifth control line EM1;

[0206] As Figure 11 or Figure 12 shown, the fourth control line EM0 is multiplexed as the sixth control line EM01;

[0207] As Figure 13 or Figure 14 shown, the fifth control line EM1 is multiplexed as the seventh control line EM11.

[0208] In this way, the number of signal lines can be reduced, the occupied space of the signal lines is decreased, and it is convenient to increase the pixel density of the display panel formed by the pixel circuit.

[0209] Optionally, referring to Figure 11 , Figure 12 , Figure 13 or Figure 14 , the pixel circuit further includes a threshold compensation module 140; the control terminal of the threshold compensation module 140 is connected to the first control line EMB1, and the first control line EMB1 is multiplexed as the eighth control line EMB11. With this setting, the number of signal lines can be further reduced, the occupied space of the signal lines is decreased, and it is convenient to increase the pixel density of the display panel formed by the pixel circuit.

[0210] Based on the above technical solution, the control signals on some control lines are described below, but it is not a limitation to the present application.

[0211] In one implementation, optionally, referring to Figure 13 or Figure 14 , the control electrode of the fifth transistor T5 is connected to the third control line EM2; the period when the third control signal on the third control line EM2 is at an effective level overlaps with the period when the first control signal on the first control line EMB1 is at an effective level, and the overlapping duration is less than or equal to one row time; the effective level of the third control signal on the third control line EM2 is delayed by one row time relative to the effective level of the fifth control signal on the fifth control line EM1.

[0212] Specifically, the period when the third control signal on the third control line EM2 is at an effective level overlaps with the period when the first control signal on the first control line EMB1 is at an effective level for a duration less than or equal to one row time, so that the duration when the third control signal controls the fifth transistor T5 and the first control signal controls the eighth transistor T8 are simultaneously turned on is less than or equal to one row time, thereby making the time for forming a current loop among the first power supply line VDD, the fifth transistor T5, the driving module 110 (the first transistor T1), the second reset module 190, and the first reset module 180 as shown in Figure 13 short, or the time for forming a current loop among the first power supply line VDD, the fifth transistor T5, the driving module 110 (the first transistor T1), the second reset module 190, and the first reset module 180 as shown in Figure 14 short, and power consumption waste can be reduced.

[0213] In another implementation, optionally, referring to Figure 11 or Figure 12, the control electrode of the fifth transistor T5 is connected to the second control line EMB2, and the effective level of the second control signal on the second control line EMB2 is delayed by one row time relative to the effective level of the first control signal on the first control line EMB1.

[0214] Exemplarily, the display panel corresponding to the pixel circuit further includes a plurality of cascaded second shift registers. The plurality of pixel circuits in the display panel are arranged in an array. The second control line EMB2 and the first control line EMB1 extend along the row direction. One second control line EMB2 is correspondingly connected to one row of pixel circuits, and one first control line EMB1 is correspondingly connected to one row of pixel circuits. For example, the m-th stage second shift register is connected to the first control line EMB1 corresponding to the m-th row of pixel circuits and is connected to the second control line EMB2 corresponding to the (m - 1)-th row of pixel circuits, or the m-th stage second shift register is connected to the first control line EMB1 corresponding to the (m + 1)-th row of pixel circuits and is connected to the second control line EMB2 corresponding to the m-th row of pixel circuits. In this way, the second shift registers can be shared, thereby reducing the number of shift registers, which is beneficial to realizing a narrow border. Wherein, m is an integer greater than 1.

[0215] Optionally, the third control signal controls the conduction duration of the fifth transistor T5 in the reset stage to be less than or equal to one row time;

[0216] Or, the first control signal controls the conduction duration of the second reset module 190 in the reset stage to be less than or equal to one row time.

[0217] In this way, the simultaneous conduction duration of the fifth transistor T5 and the second reset module 190 can be made less than or equal to one row time, so that Figure 13 As shown, the time for forming a current loop among the first power supply line VDD, the fifth transistor T5, the driving module 110 (the first transistor T1), the second reset module 190, and the first reset module 180 is short, or Figure 14 As shown, the time for forming a current loop among the first power supply line VDD, the fifth transistor T5, the driving module 110 (the first transistor T1), the second reset module 190, and the first reset module 180 is short, which can reduce power consumption waste.

[0218] Optionally, referring to Figure 11 , Figure 12 , Figure 13 or Figure 14, the first reset module 180 includes a seventh transistor T7, and the type of the seventh transistor T7 is different from that of the sixth transistor T6. In this way, when the seventh transistor T7 and the sixth transistor T6 share the same control line, the seventh transistor T7 and the sixth transistor T6 will not be turned on simultaneously, so as to ensure that when the seventh transistor T7 resets the first end of the light-emitting module 170, the sixth transistor T6 will not be turned on. It is ensured that when the sixth transistor T6 is turned on to transmit the driving current, the seventh transistor T7 will not transmit the first reset voltage to the first end of the light-emitting module 170.

[0219] Based on the above technical solution, optionally, referring to Figures 11 to 14 , the control terminal of the data writing module 130 is connected to the scan line Scan;

[0220] When the refresh frequency of the display panel corresponding to the pixel circuit is less than the preset frequency, the frequency of the effective level of the fourth control signal on the fourth control line EM0 is greater than the frequency of the effective level of the scan signal on the scan line Scan;

[0221] The frequency of the effective level of the fifth control signal on the fifth control line EM1 is greater than the frequency of the effective level of the scan signal on the scan line Scan;

[0222] The frequency of the effective level of the scan signal on the scan line Scan is the same as the frequency of the effective level of the first control signal on the first control line EMB1;

[0223] When the refresh frequency of the display panel is greater than or equal to the preset frequency, the frequencies of the effective levels of the fourth control signal on the fourth control line EM0, the scan signal on the scan line Scan, and the first control signal on the first control line EMB1 are all the same.

[0224] Among them, for example, the preset frequency is any value in 10Hz - 120Hz. For example, the preset frequency can be 60Hz, or 30Hz, or 120Hz. This embodiment does not make a limitation.

[0225] Specifically, when the refresh frequency of the display panel formed by the pixel circuit is less than the preset frequency, that is, when the display panel is applied to low-frequency refresh, by setting the efficiency of the effective level of the fourth control signal to be greater than the efficiency of the effective level of the scan signal, and the efficiency of the effective level of the fifth control signal to be greater than the frequency of the effective level of the scan signal, the frequency of the fourth control signal or the fifth control signal controlling the first reset module 180 to turn on can be made higher, realizing high-frequency reset of the first end of the light-emitting module 170, that is, clearing the residual charge at the first end of the light-emitting module 170 at a high frequency, thereby avoiding the problem of drive current fluctuation caused by the drive module 110 generating drive current for a long time when the refresh frequency is low, and thus avoiding low-frequency flicker.

[0226] The frequency of the effective level of the scan signal on the scan line Scan is the same as the frequency of the effective level of the first control signal on the first control line EMB1, so that the frequency of the effective level of the control signal corresponding to the transistor that does not require high-frequency startup can be relatively low, thereby reducing power consumption.

[0227] The refresh frequency of the display panel is greater than or equal to a preset frequency, that is, when the display panel is applied to high-frequency refreshing, it can ensure high-frequency reset of the first end of the light-emitting module 170. Then, the frequency of the effective level of the fourth control signal on the fourth control line EM0, the frequency of the effective level of the scan signal on the scan line Scan, and the frequency of the effective level of the first control signal on the first control line EMB1 can be set to be the same, which is beneficial to reducing power consumption.

[0228] Optionally, when the refresh frequency of the display panel is less than the preset frequency, a display frame of the display panel corresponding to the pixel circuit includes a writing frame and a holding frame; the reset stage includes a first reset sub-stage located in the writing frame and a second reset sub-stage located in the holding frame; the first reset module 18- is used to conduct in response to the fourth control signal or the fifth control signal in the first reset sub-stage and the second reset sub-stage, and transmit the first reset voltage on the first reset signal line Vref1 to the first end of the light-emitting module 170. In this way, the reset frequency of the first end of the light-emitting module 170 is relatively high, and the first end of the light-emitting module 170 is high-frequency reset, thereby avoiding the problem of driving current fluctuation caused by the driving module 110 generating driving current for a long time when the refresh frequency is relatively low, and thus avoiding low-frequency flicker.

[0229] Optionally, referring to Figure 11 or Figure 13 , the first reset module 180 includes a seventh transistor T7. The first pole of the seventh transistor T7 is connected to the first reset signal line Vref1, the second pole of the seventh transistor T7 is connected to the first end of the light-emitting module 170, and the control pole of the seventh transistor T7 is connected to the sixth control line EM01 or the seventh control line EM11.

[0230] Wherein, the first pole of the seventh transistor T7 is the source pole, and the second pole of the seventh transistor T7 is the drain pole; or, the first pole of the seventh transistor T7 is the drain pole, and the second pole of the seventh transistor T7 is the source pole, which is not limited in this embodiment. When the seventh transistor T7 is turned on, the first reset voltage on the first reset signal line Vref1 can be transmitted to the first end of the light-emitting module 170 to reset the first end of the light-emitting module 170.

[0231] Optionally, referring to Figure 11 or Figure 13, the second reset module 190 includes an eighth transistor T8. The eighth transistor T8 is connected between the first end of the light-emitting module 170 and the second end of the driving module 110, and the control electrode of the eighth transistor T8 is connected to the eighth control line EMB11.

[0232] Wherein, the first electrode of the eighth transistor T8 is the source electrode, and the second electrode of the eighth transistor T8 is the drain electrode; alternatively, the first electrode of the eighth transistor T8 is the drain electrode, and the second electrode of the eighth transistor T8 is the source electrode. This embodiment does not make a limitation. When the eighth transistor T8 is turned on, the first reset voltage at the first end of the light-emitting module 170 can be transmitted to the first end s of the driving module 110, facilitating the driving module 110 to be turned on. And when the eighth transistor T8 and the seventh transistor T7 are turned on, it is convenient for the first end of the coupling module 120 to discharge through the threshold compensation module 140, the driving module 110, the eighth transistor T8, and the seventh transistor T7, thereby performing threshold compensation on the driving module 110.

[0233] Optionally, refer to Figure 11 or Figure 13 , the eighth transistor T8 is an N-type transistor. In this way, the leakage current at the first end s of the driving module 110 can be reduced, facilitating the maintenance of the stability of the driving current generated by the driving module 110.

[0234] Optionally, refer to Figure 12 or Figure 14 , the first reset module 180 includes a seventh transistor T7. The first electrode of the seventh transistor T7 is connected to the first reset signal line Vref1, the second electrode of the seventh transistor T7 is connected to the first end of the light-emitting module 170, and the control electrode of the seventh transistor T7 is connected to the sixth control line EM01 or the seventh control line EM11. Figure 12 The seventh transistor T7 shown in Figure 11 has the same working principle as the seventh transistor T7 shown in Figure 14 The seventh transistor T7 shown in Figure 13 has the same working principle as the seventh transistor T7 shown in

[0235] Optionally, refer to Figure 12 or Figure 14 , the second reset module 190 includes an eighth transistor T8. The eighth transistor T8 is connected between the second reset signal line Vref2 and the first end s of the driving module 110, and the control electrode of the eighth transistor T8 is connected to the eighth control line EMB11.

[0236] Among them, the first pole of the eighth transistor T8 is the source pole, and the second pole of the eighth transistor T8 is the drain pole; or, the first pole of the eighth transistor T8 is the drain pole, and the second pole of the eighth transistor T8 is the source pole. This embodiment does not make a limitation. When the eighth transistor T8 is turned on, the second reset voltage on the second reset signal line Vref2 can be transmitted to the first end s of the driving module 110, facilitating the conduction of the driving module 110. And when the eighth transistor T8 is turned on, it is convenient for the first end of the coupling module 120 to discharge through the threshold compensation module 140, the driving module 110, and the eighth transistor T8, thereby performing threshold compensation on the driving module 110.

[0237] Optionally, refer to Figure 12 or Figure 14 , the eighth transistor T8 is an N-type transistor. In this way, the leakage current at the first end s of the driving module 110 can be reduced, facilitating the maintenance of the stability of the driving current generated by the driving module 110.

[0238] The possible working process of the pixel circuit will be described below, but it is not a limitation to this application.

[0239] In one implementation, Figure 15 is a timing diagram of a pixel circuit provided by an embodiment of the present invention. Figure 15 For Figure 11 and Figure 12 corresponding timing diagrams, refer to Figure 11 and Figure 15 , when the display panel formed by the pixel circuit is applied to high-frequency refreshing, the driving process of the pixel circuit includes the following stages.

[0240] In the reset stage t11, the first control signal Emb1 on the first control line EMB1 is at a high level, the second control signal Emb2 on the second control line EMB2 is at a low level, the fourth control signal Em0 on the fourth control line EM0 is at a low level, the seventh transistor T7, the eighth transistor T8, the second transistor T2, and the fifth transistor T5 are turned on. The seventh transistor T7 transmits the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1 to reset the first pole a of the organic light-emitting diode D1, so that Va = Vr1. The eighth transistor T8 transmits the first reset voltage to the first pole s of the first transistor T1, so that Vs = Vr1. The first power supply voltage Vdd on the first power supply line VDD charges the first pole of the first capacitor C1 through the fifth transistor T5 and the second transistor T2, so that the voltage Vg at the control pole g of the first transistor T1 is relatively high, making Vg > Vs + Vth, where Vth is the threshold voltage of the first transistor T1, thereby turning on the first transistor T1.

[0241] During the compensation stage t12, the first control signal Emb1 on the first control line EMB1 is at a high level, the second control signal Emb2 on the second control line EMB2 is at a high level, the fourth control signal Em0 on the fourth control line EM0 is at a low level, the first transistor T1, the second transistor T2, the third transistor T3, the seventh transistor T7, and the eighth transistor T8 are turned on. The seventh transistor T7 transfers the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1, such that Va = Vr1. The eighth transistor T8 transfers the first reset voltage to the first pole s of the first transistor T1, and the third transistor T3 transfers the first reset voltage to the second pole n of the first capacitor C1, such that Vn = Vr1. The voltage of the second pole n of the first capacitor C1 is fixed, such that the first pole of the first capacitor C1 discharges to the first reset signal line Vref1 through the second transistor T2, the first transistor T1, the eighth transistor T8, and the seventh transistor T7 until the voltage of the first pole of the first capacitor C1 (i.e., the control pole g of the first transistor T1) is Vr1 + Vth, and the first transistor T1 is turned off, achieving threshold compensation.

[0242] During the data writing stage t13, the second control signal Emb2 on the second control line EMB2 is at a high level, the fourth control signal Em0 on the fourth control line EM0 is at a low level, the scan signal S1 on the scan line Scan is at a low level, the seventh transistor T7 is turned on, the fourth transistor T4 and the third transistor T3 are turned on. The seventh transistor T7 transfers the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1 to maintain the voltage of the second pole of the second capacitor C2. The fourth transistor T4 transfers the data voltage Vdata on the data line Data to the first pole s of the first transistor T1, and the third transistor T3 transfers the data voltage Vdata to the first pole of the second capacitor C2, such that Vn = Vdata. The voltage difference across the first capacitor C1 remains unchanged, and the voltage difference across the first capacitor C1 is Vth, such that the voltage of the first pole of the first capacitor C1 is Vg = Vdata + Vth, achieving the writing of the data voltage.

[0243] In the light-emitting stage t14, the second control signal Emb2 on the second control line EMB2 is at a low level, and the fourth control signal Em0 on the fourth control line EM0 is at a high level. The fifth transistor T5 and the sixth transistor T6 are turned on, and the voltage of the first pole a of the organic light-emitting diode D1 is Va = Vss + Voled. Here, Vss is the second power supply voltage on the second power supply line VSS, and Voled is the forward voltage of the organic light-emitting diode D1. The voltage difference across the second capacitor C2 remains unchanged, and the voltage difference across the first capacitor C1 remains unchanged, such that Vg = Vdata + Vth + Vss + Voled - Vr1. The sixth transistor T6 is turned on, such that the voltage of the first pole s of the first transistor T1 is Vs = Vss + Voled. Then, the voltage difference Vgs between the control pole g and the first pole s of the first transistor T1 is Vgs = Vdata + Vth - Vr1. The first power supply line VDD, the fifth transistor T5, the first transistor T1, the sixth transistor T6, the organic light-emitting diode D1, and the second power supply line VSS can form a current loop, such that the first transistor T1 generates a driving current, and the organic light-emitting diode D1 emits light in response to the driving current. If the driving current is I, then where μ is the electron mobility of the first transistor T1, Cox is the channel capacitance per unit area of the first transistor T1, W is the channel width of the first transistor T1, L is the channel length of the first transistor T1, and Vth is the threshold voltage of the first transistor T1. In this way, the driving current is only related to the data voltage and the first reset voltage, avoiding the problem of driving current fluctuation caused by the threshold voltage shift of the first transistor T1, and also avoiding the driving current fluctuation caused by the voltage drops of the first power supply line VDD and the second power supply line VSS, and avoiding the influence of the forward voltage change caused by the aging of the organic light-emitting diode D1 on the driving current, so as to ensure the stability of the driving current, and further ensure that the organic light-emitting diode D1 can emit light stably, and can improve the display effect of the display panel formed by the pixel circuit.

[0244] Moreover, the driving current is only related to the data voltage and the first reset voltage, and is independent of the capacitance value of the capacitor, that is, there is no capacitance influence, so that the driving current can be relatively large, which is convenient for implementing the high-brightness technology.

[0245] Reference Figure 12 and Figure 15 , when the display panel formed by the pixel circuit is applied to high-frequency refreshing, the driving process of the pixel circuit includes the following stages.

[0246] In the reset stage t11, the first control signal Emb1 on the first control line EMB1 is at a high level, the second control signal Emb2 on the second control line EMB2 is at a low level, the fourth control signal Em0 on the fourth control line EM0 is at a low level, the seventh transistor T7, the eighth transistor T8, the second transistor T2, and the fifth transistor T5 are turned on. The seventh transistor T7 transfers the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1 to reset the first pole a of the organic light-emitting diode D1, such that Va = Vr1. The eighth transistor T8 transfers the second reset voltage Vr2 on the second reset signal line Vref2 to the first pole s of the first transistor T1, such that Vs = Vr2. The first power supply voltage Vdd on the first power supply line VDD charges the first pole of the first capacitor C1 through the fifth transistor T5 and the second transistor T2, such that the voltage Vg of the control pole g of the first transistor T1 is relatively high, such that Vg > Vs + Vth, where Vth is the threshold voltage of the first transistor T1, thereby turning on the first transistor T1.

[0247] In the compensation stage t12, the first control signal Emb1 on the first control line EMB1 is at a high level, the second control signal Emb2 on the second control line EMB2 is at a high level, the fourth control signal Em0 on the fourth control line EM0 is at a low level, the first transistor T1, the second transistor T2, the third transistor T3, the seventh transistor T7, and the eighth transistor T8 are turned on. The seventh transistor T7 transfers the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1, such that Va = Vr1. The eighth transistor T8 transfers the second reset voltage Vr2 to the first pole s of the first transistor T1, and the third transistor T3 transfers the first reset voltage to the second pole n of the first capacitor C1, such that Vn = Vr2. The voltage of the second pole n of the first capacitor C1 is fixed, such that the first pole of the first capacitor C1 discharges to the second reset signal line Vref2 through the second transistor T2, the first transistor T1, and the eighth transistor T8 until the voltage of the first pole (i.e., the control pole g of the first transistor T1) of the first capacitor C1 is Vr2 + Vth, and the first transistor T1 is turned off (i.e., cut off), achieving threshold compensation.

[0248] In the data writing stage t13, the second control signal Emb2 on the second control line EMB2 is at a high level, the fourth control signal Em0 on the fourth control line EM0 is at a low level, the scanning signal S1 on the scanning line Scan is at a low level, the seventh transistor T7 is turned on, the fourth transistor T4 and the third transistor T3 are turned on, and the seventh transistor T7 transmits the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1, so that Va = Vr1, maintaining the voltage of the second pole of the second capacitor C2. The fourth transistor T4 transmits the data voltage Vdata on the data line Data to the first pole s of the first transistor T1, and the third transistor T3 transmits the data voltage Vdata to the first pole of the second capacitor C2, so that Vn = Vdata. The voltage difference across the first capacitor C1 remains unchanged, and the voltage difference across the first capacitor C1 is Vth, so that the voltage of the first pole of the first capacitor C1 is Vg = Vdata + Vth, realizing the writing of the data voltage.

[0249] In the light-emitting stage t14, the second control signal Emb2 on the second control line EMB2 is at a low level, the fourth control signal Em0 on the fourth control line EM0 is at a high level, the fifth transistor T5 and the sixth transistor T6 are turned on, and the voltage of the first pole a of the organic light-emitting diode D1 is Va = Vss + Voled. Here, Vss is the second power supply voltage on the second power supply line VSS, and Voled is the forward voltage of the organic light-emitting diode D1. The voltage difference across the second capacitor C2 remains unchanged, and the voltage difference across the first capacitor C1 remains unchanged, so that Vg = Vdata + Vth + Vss + Voled - Vr1. The sixth transistor T6 is turned on, so that the voltage of the first pole s of the first transistor T1 is Vs = Vss + Voled. Then the voltage difference Vgs between the control pole of the first transistor T1 and the first pole s of the first transistor T1 is Vdata + Vth - Vr1. The first power supply line VDD, the fifth transistor T5, the first transistor T1, the sixth transistor T6, the organic light-emitting diode D1, and the second power supply line VSS can form a current loop, so that the first transistor T1 generates a driving current, and the organic light-emitting diode D1 emits light in response to the driving current. If the driving current is I, then

[0250]

[0251] In another embodiment, Figure 16 is the timing diagram of another pixel circuit provided by the embodiment of the present invention. Refer to Figure 11 and Figure 16, when the display panel formed by the pixel circuit is applied to low-frequency refreshing, a display frame of the display panel includes a writing frame t1 and a holding frame t2. During the writing frame t1, the driving process of the pixel circuit includes a first reset sub-phase t11, a compensation phase t12, a data writing phase t13, and a first light-emitting sub-phase t14. During the writing frame t1, the driving process of the pixel circuit is the same as that of the Figure 15 corresponding timing diagram, which will not be elaborated here. During the holding frame t2, the driving process of the pixel circuit includes a second reset sub-phase t21 and a second light-emitting sub-phase t22.

[0252] During the second reset sub-phase t21, the fourth control signal Em0 on the fourth control line EM0 is at a low level, the seventh transistor T7 is turned on, and the seventh transistor T7 transmits the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1 to reset the first pole a of the organic light-emitting diode D1.

[0253] During the second light-emitting sub-phase t22, the second control signal Emb2 on the second control line EMB2 is at a low level, the fourth control signal Em0 on the fourth control line EM0 is at a high level, the fifth transistor T5 and the sixth transistor T6 are turned on, and the first power supply line VDD, the fifth transistor T5, the first transistor T1, the sixth transistor T6, the organic light-emitting diode D1, and the second power supply line VSS can form a current loop, enabling the first transistor T1 to generate a driving current, and the organic light-emitting diode D1 emits light in response to the driving current.

[0254] In another embodiment, Figure 17 is the timing diagram of another pixel circuit provided by the embodiment of the present invention. Figure 17 For Figure 13 and Figure 14 corresponding timing diagrams, referring to Figure 17 , the driving process of the pixel circuit includes the following stages. Referring to Figure 13 and Figure 17 , when the display panel formed by the pixel circuit is applied to high-frequency refreshing, the driving process of the pixel circuit includes the following stages.

[0255] In the reset stage t11, the first control signal Emb1 on the first control line EMB1 is at a high level, the second control signal Emb2 on the second control line EMB2 is at a low level, the fifth control signal Em1 on the fifth control line EM1 is at a high level, the third control signal Em2 on the third control line EM2 is at a low level, the seventh transistor T7, the eighth transistor T8, the second transistor T2, and the fifth transistor T5 are turned on. The seventh transistor T7 transmits the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1, resetting the first pole a of the organic light-emitting diode D1 so that Va = Vr1. The eighth transistor T8 transmits the first reset voltage to the first pole s of the first transistor T1, so that Vs = Vr1. The first power supply voltage Vdd on the first power supply line VDD charges the first pole of the first capacitor C1 through the fifth transistor T5 and the second transistor T2, making the voltage Vg of the control pole g of the first transistor T1 relatively high, such that Vg > Vs + Vth, where Vth is the threshold voltage of the first transistor T1, thereby turning on the first transistor T1.

[0256] In the compensation stage t12, the first control signal Emb1 on the first control line EMB1 is at a high level, the second control signal Emb2 on the second control line EMB2 is at a high level, the fifth control signal Em1 on the fifth control line EM1 is at a high level, the first transistor T1, the second transistor T2, the third transistor T3, the seventh transistor T7, and the eighth transistor T8 are turned on. The seventh transistor T7 transmits the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1, so that Va = Vr1. The eighth transistor T8 transmits the first reset voltage to the first pole s of the first transistor T1, and the third transistor T3 transmits the first reset voltage to the second pole n of the first capacitor C1, so that Vn = Vr1. The voltage of the second pole n of the first capacitor C1 is fixed, causing the first pole of the first capacitor C1 to discharge through the second transistor T2, the first transistor T1, the eighth transistor T8, and the seventh transistor T7 to the first reset signal line Vref1 until the voltage of the first pole (i.e., the control pole g of the first transistor T1) of the first capacitor C1 is Vr1 + Vth, and the first transistor T1 is turned off (i.e., cut off), achieving threshold compensation.

[0257] In the data writing stage t13, the second control signal Emb2 on the second control line EMB2 is at a high level, the fifth control signal Em1 on the fifth control line EM1 is at a high level, the scanning signal S1 on the scanning line Scan is at a low level, the seventh transistor T7 is turned on, the fourth transistor T4 and the third transistor T3 are turned on, the seventh transistor T7 transmits the first reset voltage Vr1 on the first reset signal line Vref1 to the first pole a of the organic light-emitting diode D1, maintains the voltage of the second pole of the second capacitor C2, the fourth transistor T4 transmits the data voltage Vdata on the data line Data to the first pole s of the first transistor T1, the third transistor T3 transmits the data voltage Vdata to the first pole of the second capacitor C2, making Vn = Vdata, the voltage difference across the first capacitor C1 remains unchanged, the voltage difference across the first capacitor C1 is Vth, making the voltage of the first pole of the first capacitor C1 Vg = Vdata + Vth, and the data voltage is written.

[0258] In the light-emitting stage t14, the fifth control signal Em1 on the fifth control line EM1 is at a low level, the third control signal Em2 on the third control line EM2 is at a low level, the fifth transistor T5 and the sixth transistor T6 are turned on, and the voltage of the first pole a of the organic light-emitting diode D1 is Va = Vss + Voled. Wherein, Vss is the second power supply voltage on the second power supply line VSS, and Voled is the forward voltage of the organic light-emitting diode D1. The voltage difference across the second capacitor C2 remains unchanged, the voltage difference across the first capacitor C1 remains unchanged, making Vg = Vdata + Vth + Vss + Voled - Vr1. The sixth transistor T6 is turned on, making the voltage of the first pole s of the first transistor T1 Vs = Vss + Voled. Then the voltage difference Vgs between the control pole of the first transistor T1 and the first pole s of the first transistor T1 is Vgs = Vdata + Vth - Vr1. The first power supply line VDD, the fifth transistor T5, the first transistor T1, the sixth transistor T6, the organic light-emitting diode D1 and the second power supply line VSS can form a current loop, making the first transistor T1 generate a driving current, and the organic light-emitting diode D1 emits light in response to the driving current. If the driving current is I, then Wherein, μ is the electron mobility of the first transistor T1, Cox is the channel capacitance per unit area of the first transistor T1, W is the channel width of the first transistor T1, L is the channel length of the first transistor T1, and Vth is the threshold voltage of the first transistor T1. In this way, the driving current is only related to the data voltage and the first reset voltage, avoiding the problem of driving current fluctuation caused by the threshold voltage shift of the first transistor T1, and also avoiding the driving current fluctuation caused by the voltage drop of the first power supply line VDD and the second power supply line VSS, and avoiding the influence of the cross-voltage change caused by the aging of the organic light-emitting diode D1 on the driving current. Therefore, the stability of the driving current can be ensured, and further the stable light emission of the organic light-emitting diode D1 can be ensured, and the display effect of the display panel formed by the pixel circuit can be improved.

[0259] Figure 14 The corresponding driving process is the same as that of Figure 13 The corresponding driving process, Figure 14 During the corresponding driving process, the voltage change of each node is the same as that of Figure 12 During the corresponding driving process of the corresponding node, and will not be elaborated here.

[0260] In summary, as Figures 15 to 17 shown, the pixel circuit of this embodiment only needs three groups of control signals to realize the driving process of the pixel circuit, so that the number of shift registers required by the pixel circuit is small, which is convenient to realize a narrow border.

[0261] The embodiment of the present invention also provides a driving method for a pixel circuit, and the pixel circuit is the pixel circuit provided by any implementation scheme of the present invention. As Figure 1 shown, the pixel circuit includes: a driving module 110, a coupling module 120, and a data writing module 130; a first end of the coupling module 120 is connected to a control end of the driving module 110; a first end of the data writing module 130 is connected to a first end of the driving module 110, and the first end of the data writing module 130 is also connected to a second end of the coupling module 120.

[0262] Figure 18 is a flowchart of a driving method for a pixel circuit provided by an embodiment of the present invention. Referring to Figure 18 , the driving method of the pixel circuit includes:

[0263] S101. In the data writing stage, the data writing module is turned on to transmit the data voltage to the second end of the coupling module, and the voltage containing the data voltage information at the second end of the coupling module is coupled to the control end of the driving module through the coupling module.

[0264] Specifically, when turned on, the data writing module 130 can transmit a data voltage to the second end of the coupling module 120. The coupling module 120 can couple the voltage containing data voltage information at the second end of the coupling module 120 to the first end of the coupling module 120, that is, to the control end of the driving module 110, thereby realizing the writing of the data voltage. In this way, the direct writing of the data voltage is realized without passing through the driving module 110, which can effectively reduce the required time for data writing, so as to be easily applied to a display panel with a higher refresh frequency. Moreover, when writing data, without passing through the driving module 110 and the threshold compensation module, the data writing stage and the threshold compensation stage can be separated. When the refresh frequency of the display panel is relatively high, a relatively long threshold compensation time can still be set, so as to improve the threshold compensation effect, make the driving current generated by the driving module 110 independent of the threshold voltage of the transistors in the driving module 110, and make the element electrical properties of the transistors in the driving module 110 not affect the grayscale brightness difference of the display device. That is, at the same grayscale, the driving currents generated by different driving modules 110 tend to be consistent, thereby improving the display uniformity of the display panel corresponding to the pixel circuit, and further improving the display effect of the display panel and the service performance of the display panel.

[0265] S102. In the light-emitting stage, the driving module generates a driving current to drive the light-emitting module to emit light.

[0266] Specifically, the pixel circuit may further include a light-emitting module. The driving module 110 is connected to the light-emitting module. The driving module 110 can generate a driving current, and the light-emitting module emits light in response to the driving current.

[0267] Based on the above technical solution, optionally, referring to Figure 3 , the pixel circuit further includes: a threshold compensation module 140, and the threshold compensation module 140 is connected between the control end and the second end of the driving module 110. Optionally, referring to Figure 3 , the pixel circuit further includes: a switch module 150. The first end of the switch module 150 is connected to the first end of the data writing module 130, the second end of the switch module 150 is connected to the second end of the coupling module 120, and the control end of the switch module 150 is connected to the scan line Scan or the second control line EMB2.

[0268] Figure 19 is a flowchart of another driving method of the pixel circuit provided by an embodiment of the present invention. Optionally, referring to Figure 19 , the driving method of the pixel circuit includes:

[0269] S201. In the compensation stage, the threshold compensation module is turned on to perform threshold compensation on the driving module.

[0270] Specifically, in the compensation stage, the threshold compensation module 140 is turned on to perform threshold compensation on the driving module 110. Thus, the compensation stage and the data writing stage are separated, so that the duration of the compensation stage can be independently controlled. When the refresh frequency of the display panel corresponding to the pixel circuit is relatively high, a longer compensation time can also be set, thereby ensuring the threshold compensation effect, making the driving current generated by the driving module 110 independent of the threshold voltage of the transistors in the driving module 110, and preventing the device electrical properties of the transistors in the driving module 110 from affecting the grayscale brightness difference of the display device. That is, at the same grayscale, the driving currents generated by different driving modules 110 tend to be consistent, thereby improving the display uniformity of the display panel corresponding to the pixel circuit.

[0271] S202. In the data writing stage, the data writing module is turned on to transmit the data voltage to the first end of the switching module, the switching module is turned on to transmit the data voltage to the second end of the coupling module, and the voltage containing the data voltage information at the second end of the coupling module is coupled to the control end of the driving module through the coupling module.

[0272] Specifically, in the data writing stage, the scan signal on the scan line Scan controls the data writing module 130 to be turned on, and the scan signal on the scan line Scan or the second control signal on the second control line EMB2 controls the switching module 150 to be turned on, so that the data writing module 130 transmits the data voltage on the data line Data to the first end of the switching module 150 (i.e., the first end s of the driving module 110), and the switching module 150 transmits the data voltage to the second end n of the coupling module 120, facilitating the coupling module 120 to couple the voltage containing the data voltage information at the second end of the coupling module 120 to the control end g of the driving module 110.

[0273] S203. In the light emitting stage, the driving module generates a driving current to drive the light emitting module to emit light.

[0274] Based on the above technical solutions, optionally, referring to Figure 9 , the pixel circuit further includes: a light emitting module 170, a first reset module 180, and a second reset module 190. The first end of the first reset module 180 is connected to the first reset signal line Vref1, and the second end of the first reset module 180 is connected to the first end of the light emitting module 170; the control end of the first reset module 180 is connected to the sixth control line EM01 or the seventh control line EM11; the second reset module 190 is connected between the second end of the first reset module 180 and the first end s of the driving module 110, and the control end of the second reset module 190 is connected to the eighth control line EMB11.

[0275] Figure 20 is a flowchart of another driving method for a pixel circuit provided by an embodiment of the present invention. Optionally, referring to Figure 20, a driving method for a pixel circuit includes:

[0276] S301. In a reset stage, a first reset module is turned on to transmit a first reset voltage on a first reset signal line to a second reset module, and the second reset module is turned on to transmit the first reset voltage to a first end of a driving module.

[0277] Specifically, in the reset stage, the first reset module 180 is turned on, and the first reset module 180 transmits the first reset voltage on the first reset signal line Vref1 to a first end of the light-emitting module 170 to reset the first end of the light-emitting module 170. Moreover, the second reset module 190 is turned on, and the second reset module 190 can transmit the first reset voltage at the first end of the light-emitting module 170 to the first end s of the driving module 110 to reset the first end s of the driving module 110, and make the voltage at the first end s of the driving module 110 relatively small, facilitating the conduction of the driving module 110.

[0278] S302. In a compensation stage, the first reset module is turned on to transmit the first reset voltage on the first reset signal line to the second reset module, and the second reset module is turned on to transmit the first reset voltage to a second end of the driving module; a threshold compensation module is turned on to perform threshold compensation on the driving module.

[0279] Specifically, in the compensation stage, the driving module 110, the threshold compensation module 140, the first reset module 180, and the second reset module 190 are turned on, so that the first end of the coupling module 120 discharges through the threshold compensation module 140, the driving module 110, the second reset module 190, and the first reset module 180 until the voltage at the control terminal g of the driving module 110 is the sum of the first reset voltage and the threshold voltage of the transistor in the driving module 110, and the driving module 110 is turned off, thereby making the voltage at the control terminal of the driving module 110 a voltage related to the threshold voltage of the transistor in the driving module 110, achieving threshold compensation.

[0280] S303. In a data writing stage, the first reset module is turned on to transmit the first reset voltage to a first end of the light-emitting module; a data writing module is turned on to transmit a data voltage to a first end of a switching module, the switching module is turned on to transmit the data voltage to a second end of the coupling module, and the voltage containing data voltage information at the second end of the coupling module is coupled to the control terminal of the driving module through the coupling module.

[0281] Specifically, the first reset module 180 is turned on during the data writing phase to maintain the voltage at the first end of the light-emitting module 170. This facilitates the coupling module 120 coupling the voltage containing data voltage information at the second end of the coupling module 120 to the control terminal g of the driving module 110 after the switching module 150 transmits the data voltage to the second end n of the coupling module 120, thereby achieving the writing of the data voltage.

[0282] S304. During the light-emitting phase, the driving module generates a driving current to drive the light-emitting module to emit light.

[0283] The technical solution of the embodiment of the present invention also provides a display panel. Figure 21 It is a schematic structural diagram of a display panel provided by an embodiment of the present invention. Refer to Figure 21 , the display panel includes the pixel circuit provided by any of the above embodiments. The display panel can be applied to mobile phones, tablets, monitors, smart watches, MP3 players, MP4 players or other wearable devices, etc. Since it includes the pixel circuit provided by any embodiment of the present invention, it also has the same beneficial effects, which will not be elaborated here.

[0284] It should be understood that various forms of the processes shown above can be used, with steps reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. There is no limitation herein.

[0285] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pixel circuit, characterized in that, Including: A driving module; A coupling module, the first end of which is connected to the control end of the driving module; A data writing module, the first end of which is connected to the first end of the driving module, and the first end of the data writing module is also connected to the second end of the coupling module. The data writing module is configured to transmit a data voltage to the second end of the coupling module, and couple, through the coupling module, the voltage containing data voltage information at the second end of the coupling module to the control end of the driving module.

2. The pixel circuit according to claim 1, wherein The control end of the data writing module is connected to a scanning line, and the second end of the data writing module is connected to a data line. The data writing module is configured to, in a data writing stage, be turned on in response to a scanning signal on the scanning line, and transmit the data voltage on the data line to the second end of the coupling module; Preferably, the pixel circuit further includes: A threshold compensation module connected between the control end and the second end of the driving module; The threshold compensation module is configured to be turned on in a compensation stage to perform threshold compensation on the driving module; Preferably, the control end of the threshold compensation module is connected to a first control line, and the threshold compensation module is configured to, in the compensation stage, be turned on in response to a first control signal on the first control line to perform threshold compensation on the driving module; Preferably, the compensation stage is located before the data writing stage.

3. The pixel circuit according to claim 2, wherein, The pixel circuit further includes: A switch module, the first end of which is connected to the first end of the data writing module, the second end of which is connected to the second end of the coupling module, and the control end of which is connected to the scanning line or a second control line. The data writing module is configured to, in the data writing stage, transmit the data voltage to the first end of the switch module, and the switch module is configured to transmit the data voltage to the second end of the coupling module; Preferably, the waveform of the effective level of the second control signal on the second control line is the same as the waveform of the effective level of the first control signal on the first control line; the effective level of the second control signal on the second control line is delayed by one row time relative to the effective level of the first control signal on the first control line.

4. The pixel circuit according to claim 3, wherein The driving module includes a first transistor, the control electrode of which is connected to the first end of the coupling module, the first pole of which is connected to the first end of the data writing module, and the second pole of which is connected to the threshold compensation module; Preferably, the threshold compensation module includes a second transistor connected between the control end and the second end of the driving module, and the control electrode of the second transistor is connected to the first control line; Preferably, the switch module includes a third transistor, the first pole of which is connected to the first end of the data writing module, the second pole of which is connected to the second end of the coupling module, and the control electrode of the third transistor is connected to the scanning line or the second control line; Preferably, the data writing module includes a fourth transistor. A first pole of the fourth transistor is connected to a first end of the driving module. A second pole of the fourth transistor is connected to the data line. A control pole of the fourth transistor is connected to the scanning line; Preferably, the type of the third transistor is the same as that of the fourth transistor, and a control pole of the third transistor is connected to the scanning line; Alternatively, the type of the third transistor is the same as that of the second transistor, and a control pole of the third transistor is connected to a second control line; Preferably, the coupling module includes a first capacitor. A first pole of the first capacitor is connected to a control end of the driving module. A second pole of the first capacitor is connected to a second end of the switching module; Preferably, the first transistor is an N-type transistor; Preferably, the second transistor is an N-type transistor.

5. The pixel circuit according to claim 1, wherein The pixel circuit further includes: a light emission control module and a light emission module. The driving module, the light emission control module, and the light emission module are connected in series between a first power supply line and a second power supply line; a switching module. A first end of the switching module is connected to a first end of the data writing module. A second end of the switching module is connected to a second end of the coupling module. A control end of the switching module is connected to the scanning line or the second control line; Preferably, the light emission control module includes a fifth transistor and a sixth transistor; The fifth transistor is connected between the first power supply line and a second end of the driving module. The fifth transistor is used to conduct during a reset stage and a light emission stage; The sixth transistor is connected between a first end of the driving module and a first end of the light emission module. The sixth transistor is used to conduct during the light emission stage; The type of the fifth transistor is different from that of the sixth transistor. A control pole of the fifth transistor is connected to the second control line. A control pole of the sixth transistor is connected to a fourth control line; alternatively, the type of the fifth transistor is the same as that of the sixth transistor. A control pole of the fifth transistor is connected to a third control line. A control pole of the sixth transistor is connected to a fifth control line; A second end of the light emission module is connected to the second power supply line.

6. The pixel circuit according to claim 5, characterized in that, A waveform of an effective level of a third control signal on the third control line is the same as a waveform of an effective level of a fifth control signal on the fifth control line; an effective level of the third control signal on the third control line is delayed by a row time with respect to the effective level of the fifth control signal on the fifth control line.

7. The pixel circuit according to claim 5, wherein the pixel circuit further includes: a threshold compensation module. The threshold compensation module is connected between a control end of the driving module and a second end of the driving module. The threshold compensation module is used to conduct during a compensation stage to perform threshold compensation on the driving module; the threshold compensation module includes a second transistor, and the type of the second transistor is different from that of the fifth transistor; Preferably, the light-emitting module includes an organic light-emitting diode, a first pole of the organic light-emitting diode is connected to the sixth transistor, and a second pole of the organic light-emitting diode is connected to the second power supply line; Preferably, the reset stage is located before the compensation stage.

8. The pixel circuit according to claim 2, wherein The pixel circuit further includes: A first reset module and a light-emitting module, a first end of the first reset module is connected to a first reset signal line, and a second end of the first reset module is connected to a first end of the light-emitting module; a control end of the first reset module is connected to a sixth control line or a seventh control line; the first reset module is configured to conduct during a reset stage, a compensation stage, and a data writing stage; A second reset module, the second reset module is connected between the second end of the first reset module and the first end of the driving module, and a control end of the second reset module is connected to an eighth control line; the second reset module is configured to conduct during the reset stage and the compensation stage; Preferably, the threshold compensation module is further configured to conduct during the reset stage.

9. The pixel circuit according to claim 2, wherein The pixel circuit further includes: A second reset module, the second reset module is connected between a second reset signal line and the first end of the driving module, and a control end of the second reset module is connected to an eighth control line; the second reset module is configured to transmit a second reset voltage on the second reset signal line to the first end of the driving module during a reset stage and the compensation stage; Preferably, the threshold compensation module is further configured to conduct during the reset stage; Preferably, the pixel circuit further includes: A first reset module and a light-emitting module, a first end of the first reset module is connected to a first reset signal line, and a second end of the first reset module is connected to a first end of the light-emitting module; a control end of the first reset module is connected to a sixth control line or a seventh control line; the first reset module is configured to conduct during a reset stage, a compensation stage, and a data writing stage.

10. The pixel circuit according to claim 8 or 9, characterized in that, The pixel circuit further includes: A storage module, the storage module is connected between the second end of the first reset module and the second end of the coupling module; the storage module is configured to store the data voltage; Preferably, the storage module includes a second capacitor, and the second capacitor is connected between the second end of the first reset module and the second end of the coupling module.

11. The pixel circuit according to claim 9, wherein A second end of the light-emitting module is connected to a second power supply line, and a first reset voltage on the first reset signal line is less than a sum of a second power supply voltage on the second power supply line and a turn-on voltage of the light-emitting module; A second end of the driving module is connected to a first power supply line, and the second reset voltage is less than a difference between a first power supply voltage on the first power supply line and a threshold voltage of a transistor in the driving module; Preferably, the second reset voltage is greater than the first reset voltage.

12. The pixel circuit according to claim 8 or 9, characterized in that, The pixel circuit further includes a light emission control module; the light emission control module includes a fifth transistor and a sixth transistor; the fifth transistor is connected between a first power supply line and a second end of the driving module; the sixth transistor is connected between a first end of the driving module and a first end of the light emitting module; a control electrode of the sixth transistor is connected to a fourth control line or a fifth control line; The fourth control line is multiplexed as the sixth control line; The fifth control line is multiplexed as the seventh control line; Preferably, the pixel circuit further includes a threshold compensation module; a control end of the threshold compensation module is connected to a first control line, and the first control line is multiplexed as an eighth control line.

13. The pixel circuit according to claim 12, wherein a control electrode of the fifth transistor is connected to a third control line; a period during which a third control signal on the third control line is at an effective level overlaps with a period during which a first control signal on the first control line is at an effective level, and a duration of the overlap is less than or equal to one horizontal period; an effective level of the third control signal on the third control line is delayed by one horizontal period relative to an effective level of a fifth control signal on the fifth control line; alternatively, a control electrode of the fifth transistor is connected to a second control line, and an effective level of a second control signal on the second control line is delayed by one horizontal period relative to an effective level of a first control signal on the first control line; Preferably, a conduction duration of the fifth transistor controlled by the third control signal in the reset stage is less than or equal to one horizontal period; alternatively, a conduction duration of the second reset module controlled by the first control signal in the reset stage is less than or equal to one horizontal period; Preferably, the first reset module includes a seventh transistor, and a type of the seventh transistor is different from a type of the sixth transistor.

14. The pixel circuit according to claim 12, wherein a control end of the data writing module is connected to a scanning line; when a refresh frequency of a display panel corresponding to the pixel circuit is less than a preset frequency, a frequency of an effective level of a fourth control signal on the fourth control line is greater than a frequency of an effective level of a scanning signal on the scanning line; a frequency of an effective level of a fifth control signal on the fifth control line is greater than a frequency of an effective level of a scanning signal on the scanning line; a frequency of an effective level of the scanning signal on the scanning line is the same as a frequency of an effective level of a first control signal on the first control line; when the refresh frequency of the display panel is greater than or equal to the preset frequency, frequencies of effective levels of the fourth control signal on the fourth control line, the scanning signal on the scanning line, and the first control signal on the first control line are all the same; Preferably, when the refresh rate of the display panel is less than a preset frequency, one display frame of the display panel corresponding to the pixel circuit includes a writing frame and a holding frame; the reset stage includes a first reset sub-stage located in the writing frame and a second reset sub-stage located in the holding frame; the first reset module is configured to be turned on in response to the fourth control signal or the fifth control signal in the first reset sub-stage and the second reset sub-stage, and transmit a first reset voltage on the first reset signal line to a first end of the light-emitting module.

15. The pixel circuit according to claim 8, wherein The first reset module includes a seventh transistor, a first pole of the seventh transistor is connected to the first reset signal line, a second pole of the seventh transistor is connected to the first end of the light-emitting module, and a control pole of the seventh transistor is connected to the sixth control line or the seventh control line; Preferably, the second reset module includes an eighth transistor, the eighth transistor is connected between the first end of the light-emitting module and the second end of the driving module, and a control pole of the eighth transistor is connected to an eighth control line; Preferably, the eighth transistor is an N-type transistor.

16. The pixel circuit according to claim 9, wherein The first reset module includes a seventh transistor, a first pole of the seventh transistor is connected to the first reset signal line, a second pole of the seventh transistor is connected to the first end of the light-emitting module, and a control pole of the seventh transistor is connected to the sixth control line or the seventh control line; Preferably, the second reset module includes an eighth transistor, the eighth transistor is connected between the second reset signal line and the first end of the driving module, and a control pole of the eighth transistor is connected to an eighth control line; Preferably, the eighth transistor is an N-type transistor.

17. A driving method for a pixel circuit, characterized in that, The pixel circuit includes a driving module, a coupling module, and a data writing module, a first end of the coupling module is connected to a control end of the driving module; a first end of the data writing module is connected to the first end of the driving module, and the first end of the data writing module is further connected to a second end of the coupling module; The driving method includes: In a data writing stage, the data writing module is turned on to transmit a data voltage to the second end of the coupling module, and the voltage containing data voltage information at the second end of the coupling module is coupled to the control end of the driving module through the coupling module.

18. The method according to claim 17, wherein The pixel circuit further includes: a threshold compensation module, the threshold compensation module is connected between the control end of the driving module and the second end of the driving module; Before the data writing stage, the driving method further includes: In a compensation stage, the threshold compensation module is turned on to perform threshold compensation on the driving module; Preferably, the pixel circuit further includes: a switch module, a first end of the switch module is connected to the first end of the data writing module, a second end of the switch module is connected to the second end of the coupling module, and a control end of the switch module is connected to a scan line or a second control line; In the data writing stage, the data writing module is turned on to transmit a data voltage to the second end of the coupling module, including: In the data writing stage, the data writing module is turned on to transmit a data voltage to the first end of the switching module, and the switching module is turned on to transmit the data voltage to the second end of the coupling module.

19. The method according to claim 18, wherein The pixel circuit further includes a light emitting module, a first reset module, and a second reset module. A first end of the first reset module is connected to a first reset signal line, and a second end of the first reset module is connected to a first end of the light emitting module; a control end of the first reset module is connected to a sixth control line or a seventh control line; the second reset module is connected between the first end of the light emitting module and the second end of the driving module, and a control end of the second reset module is connected to an eighth control line; Before the compensation stage, the driving method further includes: In the reset stage, the first reset module is turned on to transmit a first reset voltage on the first reset signal line to the second reset module, and the second reset module is turned on to transmit the first reset voltage to the first end of the driving module; Preferably, in the compensation stage, the driving method further includes: The first reset module is turned on to transmit the first reset voltage on the first reset signal line to the second reset module, and the second reset module is turned on to transmit the first reset voltage to the second end of the driving module; Preferably, in the data writing stage, the driving method further includes: The first reset module is turned on to transmit the first reset voltage to the first end of the light emitting module; Preferably, after the data writing stage, the driving method further includes: In the light emitting stage, the driving module generates a driving current to drive the light emitting module to emit light.

20. A display panel, characterized in that, Comprising the pixel circuit according to any one of claims 1-16.

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