Pixel circuit, driving method thereof and display panel

Abstract

This invention discloses a pixel circuit and its driving method, as well as a display panel. The pixel circuit includes: a driving module, a compensation module, a first initialization module, a light emission control module, and a light emission module; a first terminal of the light emission module is connected to a first power supply, and the driving module and the light emission control module are connected in series between the second terminal of the light emission module and the second power supply, wherein the voltage of the first power supply is greater than the voltage of the second power supply; the first initialization module is used to provide a first initialization voltage to the second terminal of the light emission module; the first terminal of the compensation module is connected to the first terminal of the driving module, and the second terminal of the compensation module is connected to the control terminal of the driving module, used to write a voltage containing data voltage to the control terminal of the driving module; the conduction frequency of the first initialization module is greater than the conduction frequency of the compensation module, thereby shortening the time interval between two consecutive complete extinguishing of the light emission module, making the user less sensitive to the flicker of the light emission module, and improving the display effect.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to pixel circuits and their driving methods, and display panels. Background Technology

[0002] With the development of display technology, new types of display panels, such as organic light-emitting diode (OLED) display panels, have emerged and are widely favored by consumers.

[0003] However, at lower refresh rates, the display panel is prone to flickering, affecting its display performance. Summary of the Invention

[0004] This invention provides a pixel circuit and its driving method, as well as a display panel, to solve the problem of flickering at low refresh rates.

[0005] According to one aspect of the present invention, a pixel circuit is provided, comprising: a driving module, a compensation module, a first initialization module, a light emission control module, and a light emission module; The first end of the light-emitting module is connected to the first power supply, and the driving module and the light-emitting control module are connected in series between the second end of the light-emitting module and the second power supply. The voltage of the first power supply is greater than the voltage of the second power supply. The first initialization module is used to provide a first initialization voltage to the second terminal of the light-emitting module; The first end of the compensation module is connected to the first end of the drive module, and the second end of the compensation module is connected to the control end of the drive module, for writing a voltage containing data voltage into the control end of the drive module; The conduction frequency of the first initialization module is greater than the conduction frequency of the compensation module.

[0006] Optionally, a display frame of the display panel corresponding to the pixel circuit includes a write frame and a hold frame; the pixel circuit also includes a coupling module and a voltage writing module; The voltage writing module is used to provide a second initialization voltage to the first end of the coupling module in response to a first scan signal during the first initialization phase of the write frame, and is also used to provide a data voltage to the first end of the coupling module in response to a second scan signal during the data writing phase of the write frame; The coupling module is connected to the first end of the driving module and is used to couple the voltage containing the data voltage to the control end of the driving module via the conducting compensation module during the data writing phase of the write frame.

[0007] Optionally, the pixel circuit further includes a storage module, a first end of which is connected to the control terminal of the driving module, and a second end of which is connected to the second power supply. The storage module is used to store the voltage of the control terminal of the driving module. The light emission control module includes a first light emission control unit and a second light emission control unit. A first terminal of the first light emission control unit is connected to a second terminal of the light emission module, and a second terminal of the first light emission control unit is connected to a first terminal of the driving module. The first light emission control unit is used to turn on in response to a first light emission control signal during the first initialization phase of the write frame and the second initialization phase of the hold frame, so as to transmit the potential of the second terminal of the light emission module to the first terminal of the driving module. It is also used to turn on in response to the first light emission control signal during both the first light emission phase of the write frame and the second light emission phase of the hold frame. The first end of the second light-emitting control unit is connected to the second end of the driving module, and the second end of the second light-emitting control unit is connected to the second power supply. The second light-emitting control unit is used to respond to the second light-emitting control signal being turned on in both the first light-emitting stage of the write frame and the second light-emitting stage of the hold frame. Optionally, the second light-emitting control unit is further configured to turn on in response to the second light-emitting control signal during the threshold compensation phase of the write frame, so as to transmit the voltage of the second power supply to the second terminal of the drive module; The compensation module is used to compensate the threshold voltage of the driving module in response to the third scan signal during the threshold compensation phase of the write frame; in the same write frame, the threshold compensation phase precedes the data writing phase; Optionally, the storage module includes a first capacitor, a first terminal of which is connected to the control terminal of the drive module, and a second terminal of which is connected to the second power supply. The driving module includes a first transistor, the first terminal of which is connected to the second terminal of the first light-emitting control unit, the second terminal of which is connected to the first terminal of the second light-emitting control unit, and the gate of which is connected to the second terminal of the compensation module and the first terminal of the storage module.

[0008] Optionally, the voltage writing module includes a second initialization module and a data writing module; The second initialization module is used to provide the second initialization voltage to the first terminal of the coupling module in response to the first scan signal during the first initialization phase of the write frame; The data writing module is used to provide the data voltage to the first end of the coupling module in response to the second scan signal during the data writing phase of the writing frame; Optionally, the second initialization module includes a sixth transistor, the first terminal of which is connected to the second initialization signal line, the second terminal of which is connected to the first terminal of the coupling module, and the gate of which is connected to the first scan signal; The data writing module includes a seventh transistor, the first terminal of which is connected to a data line, the second terminal of which is connected to the first end of the coupling module, and the gate of which is connected to the second scan signal. The coupling module includes a second capacitor, the first end of which is connected to the second initialization module and the data writing module, respectively, and the second end of which is connected to the first end of the driving module.

[0009] Optionally, the first initialization module is used to provide the first initialization voltage to the second terminal of the light-emitting module in response to the fourth scan signal during the first initialization phase and the threshold compensation phase of the write frame; The fourth scan signal is multiplexed as the first scan signal.

[0010] Optionally, the light-emitting control module includes a first light-emitting control unit and a second light-emitting control unit; The second light emission control signal is multiplexed into the first scanning signal.

[0011] Optionally, the first initialization module is further configured to provide a first initialization voltage to the second terminal of the light-emitting module in response to the fourth scan signal during the second initialization phase of the holding frame; The compensation module is used to respond to the third scan signal when the hold frame is turned off.

[0012] According to another aspect of the present invention, a method for driving a pixel circuit is provided for driving the pixel circuit described in the preceding aspect; The driving method for the pixel circuit includes: The first initialization module provides a first initialization voltage to the second terminal of the light-emitting module; The compensation module writes the voltage containing the data voltage to the control terminal of the driver module; The conduction frequency of the first initialization module is greater than the conduction frequency of the compensation module.

[0013] Optionally, a display frame of the display panel corresponding to the pixel circuit includes a write frame and a hold frame; the pixel circuit further includes a coupling module and a voltage writing module; the light emission control module includes a first light emission control unit and a second light emission control unit; The driving method for the pixel circuit further includes: During the first initialization phase of the write frame, the voltage writing module provides a second initialization voltage to the first end of the coupling module in response to the first scan signal, and the first initialization module provides a first initialization voltage to the second end of the light-emitting module in response to the fourth scan signal. During the threshold compensation phase of the written frame, the second light-emitting control unit is turned on in response to the second light-emitting control signal to transmit the voltage of the second power supply to the second terminal of the driving module, and the compensation module compensates the threshold voltage of the driving module in response to the third scan signal. During the data writing phase of the write frame, the voltage writing module responds to the second scan signal to provide a data voltage to the first end of the coupling module, and the coupling module couples the voltage containing the data voltage to the control end of the drive module through the conducting compensation module; During the first light-emitting stage of writing a frame, the first light-emitting control unit turns on in response to the first light-emitting control signal, and the second light-emitting control unit turns on in response to the second light-emitting control signal; During the second initialization phase of the holding frame, the first initialization module provides the first initialization voltage to the second terminal of the light-emitting module in response to the fourth scan signal, and the compensation module turns off in response to the third scan signal; During the second light-emitting phase of the frame holding, the first light-emitting control unit turns on in response to the first light-emitting control signal, and the second light-emitting control unit turns on in response to the second light-emitting control signal.

[0014] According to another aspect of the present invention, a display panel is also provided, including the pixel circuit described in the preceding aspect.

[0015] The technical solution of this invention employs an inverted light-emitting module, allowing the source of the transistors included in the light-emitting control module to be connected to a fixed potential, such as a second power supply, thus simplifying the circuit structure. A compensation module is used to write a voltage related to the data voltage into the control terminal of the driving module; therefore, the conduction frequency of the compensation module is equal to the refresh frequency of the pixel circuit. The first initialization module is used to initialize the second terminal of the light-emitting module. When the refresh frequency of the pixel circuit is low, compared to the first initialization module having a conduction frequency equal to the pixel circuit's refresh frequency, this embodiment sets the conduction frequency of the first initialization module to be greater than the pixel circuit's refresh frequency. This shortens the time interval between two consecutive complete extinguishing of the light-emitting module, thereby making the user less sensitive to the flickering of the light-emitting module, improving the flickering problem at lower refresh frequencies, and enhancing the display effect.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a pixel circuit provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention; Figure 4 A timing diagram of a pixel circuit driving a written frame is provided in an embodiment of the present invention; Figure 5 A timing diagram of a pixel circuit in holding a frame is provided as an embodiment of the present invention; Figure 6 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention; Figure 7 A simulation waveform diagram of a pixel circuit provided in an embodiment of the present invention; Figure 8 Another pixel circuit driving timing diagram provided in the embodiment of the present invention during frame writing; Figure 9 Another pixel circuit driving timing diagram in holding frame provided by an embodiment of the present invention; Figure 10 A flowchart of a driving method provided in an embodiment of the present invention; Figure 11 A flowchart of another pixel circuit driving method provided in an embodiment of the present invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] As described in the background section, pixel circuits are prone to flickering at lower refresh rates. The inventors discovered that this is because the time interval between resets of the light-emitting module is relatively long, resulting in a prolonged flickering time that is easily detected visually. For example, if the pixel circuit's refresh rate is 1Hz, resetting the light-emitting module once per second completely extinguishes it, causing it to flicker once per second, which is easily noticed by the user and affects the visual effect.

[0022] To address the aforementioned technical problems, embodiments of the present invention provide a novel pixel circuit to improve flickering at low refresh rates and enhance display performance. Figure 1 This is a schematic diagram of a pixel circuit provided in an embodiment of the present invention, with reference to... Figure 1 The pixel circuit includes: a driving module 10, a compensation module 11, a first initialization module 12, a light emission control module 13, and a light emission module 14; The first terminal of the light-emitting module 14 is connected to the first power supply VDD. The driving module 10 and the light-emitting control module 13 are connected in series between the second terminal N1 of the light-emitting module 14 and the second power supply VSS. The voltage of the first power supply VDD is greater than the voltage of the second power supply VSS. The first initialization module 12 is used to provide a first initialization voltage Vref to the second terminal N1 of the light-emitting module 14; The first end of the compensation module 11 is connected to the first end of the drive module 10, and the second end of the compensation module 11 is connected to the control terminal g of the drive module 10, for writing the voltage containing the data voltage into the control terminal g of the drive module 10. The conduction frequency of the first initialization module 12 is greater than the conduction frequency of the compensation module 11.

[0023] The light-emitting module 14 can be an OLED device. The first end of the light-emitting module 14 is the anode of the OLED device, and the second end of the light-emitting module 14 is the cathode of the OLED device. The first initialization module 12, the compensation module 11, and the light-emitting control module 13 are all switching modules. After being turned on, they connect the two ends of the module. Taking the first initialization module 12 as an example, the first end of the first initialization module 12 is connected to the first initialization voltage Vref, and the second end is connected to the second end N1 of the light-emitting module 14. After the first initialization module 12 is turned on in response to the signal connected to the control terminal, it connects the first initialization voltage Vref to the second end N1 of the light-emitting module 14. The light-emitting control module 13 may include only one switching module connected between the second end N1 of the light-emitting module 14 and the first end d of the driving module 10, or connected between the second end s of the driving module 10 and the second power supply VSS. Alternatively, the light-emitting control module 13 may include two switching modules, one connected between the second end N1 of the light-emitting module 14 and the first end d of the driving module 10, and the other connected between the second end s of the driving module 10 and the second power supply VSS. This embodiment does not specifically limit this. The light-emitting control module 13 is used to respond to the signal input to its own control terminal to conduct when the light-emitting module 14 needs to emit light, so as to form a path for the flow of driving current between the first power supply VDD and the second power supply VSS, so that the driving module 10 can drive the light-emitting module 14 to emit light according to the driving current generated by the data voltage.

[0024] The compensation module 11 is turned on when threshold compensation and data voltage writing of the driving module 10 are required. This connects the first terminal d of the driving module 10 and the control terminal g of the driving module 10, achieving threshold compensation. Then, the voltage containing the data voltage written to the first terminal d of the driving module 10 is written to the control terminal of the driving module 10, causing the driving module 10 to generate a driving current based on the data voltage. The conduction frequency of the compensation module 11 is related to the refresh frequency of the pixel circuit. Specifically, the conduction frequency of the compensation module 11 is equal to the refresh frequency of the pixel circuit, which can be understood as the frequency at which the data voltage is written to the control terminal g of the driving module 10.

[0025] The first initialization module 12 is used to initialize the second terminal N1 of the light-emitting module 14 to avoid the influence of residual charge from the previous frame on the brightness of the current frame. The difference between the voltage of the first power supply VDD and the first initialization voltage Vref is less than the activation voltage of the light-emitting module 14. Therefore, when the first initialization module 12 is turned on, and the first initialization voltage Vref is written to the second terminal N1 of the light-emitting module 14, the light-emitting module 14 will be completely turned off. The light-emitting module 14 can only be lit when the voltage difference between the first and second terminals reaches the activation voltage. In existing pixel circuits, the conduction frequency of the first initialization module 12 is equal to the conduction frequency of the compensation module 11. For example, assuming the refresh rate of the pixel circuit is 1Hz, both the conduction frequency of the first initialization module 12 and the compensation module 11 are 1Hz. That is, if the compensation module 11 is turned on once and the first initialization module 12 is turned on once per second, the light-emitting module 14 will flicker once per second. In this embodiment, the conduction frequency of the first initialization module 12 is set to be greater than that of the compensation module 11. For example, if the conduction frequency of the first initialization module 12 is set to 120Hz, then the first initialization module 12 will conduct 120 times within 1 second, performing the process of writing the first initialization voltage Vref to the second terminal N1 of the light-emitting module 14 120 times. The light-emitting module 14 will flash 120 times within 1 second. The time interval between two adjacent flashes is shortened, making it less likely to be noticed by the user. Therefore, the flickering problem is improved.

[0026] The compensation module is used to write the voltage related to the data voltage to the control terminal of the driver module. Therefore, the conduction frequency of the compensation module is equal to the refresh frequency of the pixel circuit. The first initialization module is used to initialize the second terminal of the light-emitting module. When the refresh frequency of the pixel circuit is low, compared to the first initialization module being equal to the refresh frequency of the pixel circuit, in this embodiment, the conduction frequency of the first initialization module is set to be greater than the refresh frequency of the pixel circuit. This shortens the time interval between two consecutive complete extinguishing of the light-emitting module, thereby making the user less sensitive to the flicker of the light-emitting module, improving the flicker problem at lower refresh frequencies, and enhancing the display effect.

[0027] Figure 2 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention, with reference to... Figure 2 Optionally, a display frame of the display panel corresponding to the pixel circuit includes a write frame and a hold frame; the pixel circuit also includes a coupling module 15 and a voltage writing module 16; The voltage writing module 16 is used to provide a second initialization voltage Vini to the first terminal of the coupling module 15 in response to the first scan signal S1 during the first initialization phase of the write frame, and is also used to provide a data voltage to the first terminal N2 of the coupling module 15 in response to the second scan signal S2 during the data writing phase of the write frame. The coupling module 15 is connected to the first terminal d of the driving module 10 and is used to couple the voltage containing the data voltage to the control terminal g of the driving module 10 via the conducting compensation module 11 during the data writing stage of the write frame.

[0028] The write frame includes a data writing phase for writing data voltage, and a hold frame for not writing data voltage. In the first initialization phase of the write frame, the voltage writing module 16 responds to the first scan signal S1 and turns on to write the second initialization voltage Vini to the first terminal N1 of the coupling module 15, thus resetting the coupling module 15. Simultaneously, the first initialization module 12 responds to the signal input from the control terminal and turns on to write the first initialization voltage Vref to the second terminal N1 of the light-emitting module 14, thus resetting the second terminal N1 of the light-emitting module 14. In the threshold compensation phase of the write frame, the compensation module 11 responds to the signal input from its own control terminal and turns on to compensate the threshold voltage of the driving module 10. During the data writing phase of the write frame, the voltage writing module 16 responds to the second scan signal S2 to write the data voltage Vdata to the first terminal N1 of the coupling module 15. The voltage jump variable Vdata-Vini at the first terminal of the coupling module 15 is coupled to the second terminal of the coupling module 15. The compensation module 11 is used to respond to the signal connected to its control terminal during the data writing phase of the write frame, so as to connect the second terminal of the coupling module 15 with the control terminal g of the drive module 10, thereby coupling the voltage related to the data voltage to the control terminal g of the drive module 10, realizing the writing of the data voltage. During the light emission phase of the write frame, the light emission control module 13 is used to respond to the signal connected to the control terminal, so that the drive module 10 drives the light emission module 14 to emit light.

[0029] Continue to refer to Figure 2 Optionally, the pixel circuit also includes a storage module 17. The first terminal of the storage module 17 is connected to the control terminal g of the driving module 10, and the second terminal of the storage module 17 is connected to the second power supply VSS. The storage module 17 is used to store the voltage at the control terminal g of the driving module 10. The storage module 17 can be a capacitor; during reset, only one terminal needs to be reset, simplifying the circuit structure and improving the screen resolution.

[0030] Figure 3 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention. Based on the above embodiments, refer to... Figure 2 and Figure 3The light emission control module 13 includes a first light emission control unit 131 and a second light emission control unit 132. The first terminal of the first light emission control unit 131 is connected to the second terminal N1 of the light emission module 14, and the second terminal of the first light emission control unit 131 is connected to the first terminal d of the driving module 10. The first light emission control unit 131 is used to respond to the first light emission control signal EM1 being turned on in the first initialization stage of the write frame and the second initialization stage of the hold frame, so as to transmit the potential of the second terminal of the light emission module 14 to the first terminal d of the driving module 10. It is also used to respond to the first light emission control signal EM1 being turned on in both the first light emission stage of the write frame and the second light emission stage of the hold frame. The first terminal of the second light-emitting control unit 132 is connected to the second terminal s of the driving module 10, and the second terminal of the second light-emitting control unit 132 is connected to the second power supply VSS. The second light-emitting control unit 132 is used to respond to the second light-emitting control signal EM2 being turned on in both the first light-emitting stage of the writing frame and the second light-emitting stage of the holding frame.

[0031] Both the first light-emitting control unit 131 and the second light-emitting control unit 132 are switching units, which connect the two ends of the unit after being turned on. In the first initialization stage of writing the frame, the first light-emitting control unit 131 is turned on in response to the first light-emitting control signal EM1, so that the first initialization voltage Vref is transmitted to the first end of the driving module 10 through the turned-on first initialization module 12 and the first light-emitting control unit 131. The second initialization stage of holding the frame is the same, and will not be described again here. In the first light-emitting stage of writing the frame, the first light-emitting control unit 131 is turned on in response to the first light-emitting control signal EM1, and the second light-emitting control unit 132 is turned on in response to the second light-emitting control signal EM2, so as to form a path for the driving current, so that the driving module 10 drives the light-emitting module 14 to emit light. The second light-emitting stage of holding the frame is the same, and will not be described again here.

[0032] Continue to refer to Figure 2 and Figure 3 Optionally, the voltage writing module 16 includes a second initialization module 161 and a data writing module 162; The second initialization module 161 is used to provide a second initialization voltage Vini to the first terminal of the coupling module 15 in response to the first scan signal S1 during the first initialization phase of writing the frame. The data writing module 162 is used to provide a data voltage Vdata to the first terminal of the coupling module 15 in response to the second scan signal S2 during the data writing phase of the write frame.

[0033] The first terminal of the second initialization module 161 is connected to the second initialization voltage Vini, and the second terminal is connected to the first terminal N1 of the coupling module 15. The first terminal of the data writing module is connected to the data voltage Vdata, and the second terminal is connected to the first terminal N1 of the coupling module 15. Both the second initialization module 161 and the data writing module 162 are switching modules, used to connect their first and second terminals after being turned on.

[0034] Figure 4 This invention provides a timing diagram of the pixel circuit driving a written frame. Figure 5 This invention provides a timing diagram for the driving of a pixel circuit in a holding frame. Figure 4 and Figure 5 Both are applicable Figure 3 The pixel circuit is shown. In this embodiment, the fourth scan signal S4 is multiplexed as the first scan signal S1 to save the number of signal sources, which helps to simplify circuit design and achieve a narrow bezel.

[0035] Figure 4 The initial stage t1 is the light-emitting stage of the previous frame, specifically the second light-emitting stage of the holding stage of the previous frame, during which the light-emitting module 14 is in the lit state.

[0036] During the first initialization phase t2 of the write frame, the first initialization module 12, in response to the fourth scan signal S4, provides a first initialization voltage Vref to the second terminal N1 of the light-emitting module 14. Specifically, the first initialization module 12 is turned on in response to the high level of the fourth scan signal S4 to transmit the first initialization voltage Vref to the second terminal N1 of the light-emitting module 14. The first light-emitting control unit 131 is turned on in response to the high level of the first light-emitting control signal EM1 to transmit the first initialization voltage Vref written to the second terminal N1 of the light-emitting module 14 to the first terminal of the driving module 10, thereby resetting the driving module 10. The second initialization module 161 is turned on in response to the high level of the first scan signal S1 to write the second initialization voltage Vini to the first terminal N2 of the coupling module 15, thereby resetting the coupling module 15. The data writing module 162 is turned off in response to the low level of the second scan signal S2, and the compensation module 11 is turned off in response to the low level of the third scan signal S3. The second light-emitting control unit 132 is also used to turn off in response to the second light-emitting control signal EM2 during the first initialization phase t2 of the write frame. If the second light-emitting control unit 132 is turned on, a current flow path will be formed between the first initialization voltage Vref and the second power supply VSS, resulting in current flowing into the second power supply through the driving module 10 and the second light-emitting control unit 132, leading to increased power consumption. In this embodiment, turning off the second light-emitting control unit 132 during the first initialization phase t2 of the write frame can avoid the current flowing into the second power supply VSS from the self-driving module 10 and the second light-emitting control unit 132, thereby reducing the power consumption of the pixel circuit.

[0037] During the threshold compensation phase t3 of the write frame, the first light-emitting control unit 131 shuts off in response to the low level of the first light-emitting control signal EM1, and the data writing module 162 shuts off in response to the low level of the second scan signal S2. The first initialization module 12 provides a first initialization voltage Vref to the second terminal N1 of the light-emitting module 14 in response to the fourth scan signal S4 during the threshold compensation phase t3 of the write frame. The second initialization module 161 turns on in response to the high level of the first scan signal S1, writes the second initialization voltage Vini to the first terminal of the coupling module 15, and continues to reset the coupling module 15. The second light-emitting control unit 132 also turns on in response to the second light-emitting control signal EM2 during the threshold compensation phase t3 of the write frame to transmit the voltage of the second power supply VSS to the second terminal s of the drive module 10, whereby the second terminal s of the drive module 10 maintains the voltage of the second power supply VSS during this phase. The compensation module 11 is used to compensate the threshold voltage of the driving module 10 in response to the third scan signal S3 during the threshold compensation phase t3 of the write frame. Specifically, before the compensation module 11 is turned on, the potential of the control terminal g of the driving module 10 is the potential of the previous frame. After the compensation module 11 is turned on, the first initialization voltage Vref written by the first terminal of the driving module 10 rises. After the compensation module 11 is turned on, there is a voltage difference between the control terminal g and the second terminal s of the driving module 10. Charge flows from the control terminal g of the driving module 10 through the first terminal d of the driving module 10 to the second terminal s of the driving module 10 until the voltage difference between the control terminal and the second terminal s of the driving module 10 equals the threshold voltage Vth of the driving module 10. At this point, the driving module 10 is turned off, and the charge flow stops. At the end of the threshold compensation phase t3 of the write frame, the potential of the control terminal g of the driving module 10 is Vg = V0 + Vth, where V0 is the voltage provided by the second power supply VSS.

[0038] During the data writing phase t4 of the write frame, the second initialization module 161 turns off in response to the low level of the first scan signal S1, the first initialization module 12 turns off in response to the low level of the fourth scan signal S4, the first light emission control unit 131 turns off in response to the low level of the first light emission control signal EM1, and the second light emission control unit 132 turns off in response to the low level of the second light emission control signal EM2. The compensation module 11 turns on in response to the high level of the third scan signal S3, connecting the first terminal d and the control terminal g of the drive module 10. The data writing module 162 responds to the high level of the second scan signal S2 to conduct, so as to write the data voltage Vdata into the first terminal N2 of the coupling module 15. The voltage of the first terminal N2 of the coupling module 15 jumps from the second initialization voltage Vinit to the data voltage Vdata. Under the coupling effect of the coupling module 15, the voltage of the control terminal g of the driving module 10 will jump from (V0+Vth) to V0+Vth+(Vdata-Vini)·Cc / (Cc+Cst); where Cc is the capacitance value of the coupling module 15 and Cst is the capacitance value of the storage module 17.

[0039] Within the same write frame, the threshold compensation phase t3 precedes the data writing phase t4. The threshold compensation phase t3 and the data writing phase t4 are two separate processes, with threshold voltage compensation and data voltage writing performed separately. The data voltage writing duration is related to the display panel's resolution and refresh rate; higher resolution and / or higher refresh rate result in a shorter data voltage writing duration. If data voltage writing and threshold voltage compensation occur in the same phase, the threshold voltage compensation will be insufficient at high resolutions and high refresh rates, thus affecting display uniformity. Therefore, in this embodiment, the threshold compensation phase t3 and the data writing phase t4 are separated. On high-resolution displays, this balances the conflict between brightness uniformity and refresh rate, increasing the maximum refresh rate and achieving wideband driving.

[0040] During the first light-emitting stage t5 of the written frame, the second initialization module 161 turns off in response to the low level of the first scan signal S1, the first initialization module 12 turns off in response to the low level of the fourth scan signal S4, the compensation module 11 turns off in response to the low level of the third scan signal S3, and the data writing module 162 turns off in response to the low level of the second scan signal S2. The first light-emitting control unit 131 turns on in response to the high level of the first light-emitting control signal EM1, and the second light-emitting control unit 132 turns on in response to the high level of the second light-emitting control signal EM2. The driving current generated by the driving module 10 drives the light-emitting module 14 to emit light. The driving current I = K(Vg - Vs - Vth). 2 =K((Vdata-Vini)·Cc / (Cc+Cst)) 2K is a scaling factor. It can be seen that the driving current I is not affected by the IR drop of the voltage of the first power supply VDD and the voltage of the second power supply VSS, and it achieves compensation for the threshold voltage, reduces the ghosting level, and helps to improve the brightness uniformity of the screen.

[0041] During the second initialization phase t6 of the holding frame, the compensation module 11 is turned off in response to the low level of the third scan signal S3, the second light-emitting control unit 132 is turned off in response to the low level of the second light-emitting control signal EM2, and the data writing module 162 is turned off in response to the low level of the second scan signal S2. The first light-emitting control unit 131 is turned on in response to the high level of the first light-emitting control signal EM1. The first initialization module 12 is also used to provide a first initialization voltage Vref to the second terminal N1 of the light-emitting module 14 in response to the fourth scan signal S4 during the second initialization phase t6 of the holding frame. Specifically, the first initialization module 12 is turned on in response to the high level of the fourth scan signal S4 to reset the second terminal N1 of the light-emitting module 14 and the first terminal d of the driving module 10 via the turned-on first light-emitting control unit 131. The second initialization module 161 is turned on in response to the high level of the first scan signal S1 to reset the first terminal N2 of the coupling module 15. The first initialization module 12 is turned on in both the first initialization phase t2 of the writing frame and the second initialization phase t6 of the holding frame to achieve high-frequency reset of the second terminal N1 of the light-emitting module 14.

[0042] During the second light-emitting phase t7 of the holding frame, the second initialization module 161 turns off in response to the low level of the first scan signal S1, the first initialization module 12 turns off in response to the low level of the fourth scan signal S4, the compensation module 11 turns off in response to the low level of the third scan signal S3, and the data writing module 162 turns off in response to the low level of the second scan signal S2. The first light-emitting control unit 131 turns on in response to the high level of the first light-emitting control signal EM1, and the second light-emitting control unit 132 turns on in response to the high level of the second light-emitting control signal EM2. The driving current generated by the driving module 10 drives the light-emitting module 14 to emit light. The driving current I = K(Vg - Vs - Vth). 2 =K((Vdata-Vini)·Cc / (Cc+Cst)) 2 .

[0043] The compensation module 11 is used to turn off in response to the third scan signal S3 throughout the holding frame, and the data writing module 162 is used to turn off in response to the second scan signal S2 throughout the holding frame.

[0044] The embodiments of the present invention are aimed at Figure 3 The pixel circuit shown provides a specific circuit. Figure 6 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention, with reference to... Figure 3 and Figure 6 The storage module 17 includes a first capacitor C1. The first end of the first capacitor C1 serves as the first end of the storage module 17 and is connected to the control terminal of the drive module 10. The second end of the first capacitor C1 serves as the second end of the storage module 17 and is connected to the second power supply VSS. The driving module 10 includes a first transistor T1. The first terminal of the first transistor T1 is connected to the second terminal of the first light-emitting control unit 131 as the first terminal d of the driving module 10. The second terminal of the first transistor T1 is connected to the first terminal of the second light-emitting control unit 132 as the second terminal s of the driving module 10. The gate of the first transistor T1 is connected to the second terminal of the compensation module 11 and the first terminal of the storage module 17 as the control terminal g of the driving module 10. The first light-emitting control unit 131 includes a second transistor T2, and the second light-emitting control unit 132 includes a third transistor T3. The first electrode of the second transistor T2 serves as the first terminal of the first light-emitting control unit 131 and is connected to the second terminal N1 of the light-emitting module 14. The second electrode of the second transistor T2 serves as the second terminal of the first light-emitting control unit 131 and is connected to the first terminal of the driving module 10. The gate of the second transistor T2 serves as the control terminal of the first light-emitting control unit 131 and is connected to the first light-emitting control signal EM1. The first terminal of the third transistor T3 is connected to the second terminal s of the driving module 10 as the first terminal of the second light-emitting control unit 132. The second terminal of the third transistor T3 is connected to the second power supply VSS as the second terminal of the second light-emitting control unit 132. The gate of the third transistor T3 is connected to the second light-emitting control signal EM2 as the control terminal of the second light-emitting control unit 132. The first initialization module 12 includes a fourth transistor T4. The first terminal of the fourth transistor T4 serves as the first terminal of the first initialization module 12 and is connected to the first initialization signal line used to provide the first initialization voltage Vref. The second terminal of the fourth transistor T4 serves as the second terminal of the first initialization module 12 and is connected to the second terminal N1 of the light-emitting module 14. The gate of the fourth transistor T4 serves as the control terminal of the first initialization module 12 and is connected to the fourth scan signal S4. The compensation module 11 includes a fifth transistor T5. The first terminal of the fifth transistor T5 is connected to the first terminal d of the driving module 10 as the first terminal of the compensation module 11. The second terminal of the fifth transistor T5 is connected to the control terminal g of the driving module 10 as the second terminal of the compensation module 11. The gate of the fifth transistor T5 is connected to the third scan signal S3 as the control terminal of the compensation module 11.

[0045] The second initialization module 161 includes a sixth transistor T6. The first terminal of the sixth transistor T6 is connected to the second initialization signal line for providing the second initialization voltage Vini as the first terminal of the second initialization module 161. The second terminal of the sixth transistor T6 is connected to the first terminal N2 of the coupling module 15 as the second terminal of the second initialization module 161. The gate of the sixth transistor T6 is connected to the first scan signal S1 as the control terminal of the second initialization module 161. The data writing module 162 includes a seventh transistor T7. The first terminal of the seventh transistor T7 serves as the first terminal of the data writing module 162 and is connected to the data line used to provide the data voltage Vdata. The second terminal of the seventh transistor T7 serves as the second terminal of the data writing module 162 and is connected to the first terminal of the coupling module 15. The gate of the seventh transistor T7 serves as the control terminal of the data writing module 162 and is connected to the second scan signal S2. The coupling module 15 includes a second capacitor C2. The first end of the second capacitor C2 serves as the first end N2 of the coupling module 15 and is connected to the second initialization module 161 and the data writing module 162 respectively. The second end of the second capacitor C2 serves as the second end of the coupling module 15 and is connected to the first end d of the driving module 10 and the second end of the first light-emitting control unit 131 respectively.

[0046] In this embodiment, each transistor can be an N-type transistor or a P-type transistor. In this embodiment, all transistors are N-type transistors. Therefore, the first electrode of the first transistor T1 is the drain, and the second electrode of the first transistor T1 is the source. In this embodiment, all switching modules except the driving module 10 include transistors, and the transistors are N-type transistors. An inverted OLED device is used, so that the source of the transistors included in the light-emitting control module can be connected to a fixed potential, i.e., the second power supply, to simplify the circuit structure.

[0047] Figure 7 This is a simulation waveform diagram of a pixel circuit provided in an embodiment of the present invention. Figure 7 To Figure 6 or Figure 3 The waveform diagram obtained by simulating the working process of the mid-pixel circuit. Figure 7 The horizontal axis represents time, in microseconds. Except for the driving current I, which is current, in amperes (A), all other vertical axes represent voltage, in volts (V). (Reference) Figure 3 , Figure 6 and Figure 7 The voltage of the gate of the first transistor T1 gradually decreases over time. After the second light-emitting control signal EM2 and the first light-emitting control signal EM1 are both set high, the potential of the second terminal N1 of the light-emitting module 14 drops by a certain potential, so that the potential difference between the first terminal and the second terminal of the light-emitting module 14 reaches the turn-on voltage of the light-emitting module 14, and then the light-emitting module 14 starts to light up.

[0048] In the above embodiment, the fourth scanning signal S4 is multiplexed as the first scanning signal S1. In another embodiment, the second light emission control signal EM2 is multiplexed as the first scanning signal S1. Figure 8 This is another timing diagram of the pixel circuit driving the write frame according to an embodiment of the present invention. Figure 9 Another pixel circuit driving timing diagram in holding frame provided by an embodiment of the present invention, refer to Figure 3 , Figure 8 , Figure 9 The difference between this embodiment and the one where the fourth scan signal S4 is multiplexed as the first scan signal S1 is that: The second light-emitting control unit 132 is turned on in response to the high level of the second light-emitting control signal EM2 during the first initialization phase t2 of the write frame. During the first light-emitting phase t5 of the write frame and the second light-emitting phase t7 of the holding frame, the second initialization module 161 is turned on in response to the high level of the first scan signal S1 to write the second initialization voltage Vini to the first terminal of the coupling module 15. During both the first and second light-emitting phases, the second initialization module 161 is on, making the potential across the coupling module 15 more stable and less susceptible to coupling changes from signals such as the data voltage Vdata. This helps reduce crosstalk and improve display uniformity.

[0049] This invention also provides a method for driving a pixel circuit, used to drive the pixel circuit in any of the above embodiments. Figure 10 A flowchart of a driving method provided in an embodiment of the present invention is shown below. Figure 1 and Figure 10 The method includes: S110: The first initialization module provides a first initialization voltage to the second terminal of the light-emitting module.

[0050] The first initialization module 12 is connected to the second end of the light-emitting module 14. The first initialization module 12 is turned on to transmit the first initialization voltage Vref to the second end of the light-emitting module 14, thereby resetting the light-emitting module 14.

[0051] S120: The compensation module writes the voltage containing the data voltage to the control terminal of the drive module.

[0052] The compensation module 11 is connected between the control terminal and the first terminal d of the drive module 10. After the control compensation module 11 is turned on, the voltage containing the data voltage written at the first terminal d of the drive module 10 is transmitted to the control terminal g of the drive module 10, so that the voltage containing the data voltage is written to the control terminal g of the drive module 10, so that the drive module 10 can generate a drive current according to the data voltage to drive the light-emitting module 14 to emit light.

[0053] The conduction frequency of the first initialization module 12 is greater than the conduction frequency of the compensation module 11.

[0054] The first initialization module 12 is used to initialize the second terminal N1 of the light-emitting module 14 to avoid the influence of residual charge from the previous frame on the brightness of the current frame. The voltage difference between the first power supply VDD and the first initialization voltage Vref is less than the turn-on voltage of the light-emitting module 14. Therefore, when the first initialization module 12 is turned on, writing the first initialization voltage Vref into the second terminal N1 of the light-emitting module 14 will completely turn it off. In existing pixel circuits, the conduction frequency of the first initialization module 12 is equal to the conduction frequency of the compensation module 11. For example, assuming the refresh rate of the pixel circuit is 1Hz, both the conduction frequency of the first initialization module 12 and the conduction frequency of the compensation module 11 are 1Hz. That is, if the compensation module 11 is turned on once and the first initialization module 12 is turned on once per second, the light-emitting module 14 will flicker once per second. In this embodiment, the conduction frequency of the first initialization module 12 is set to be greater than that of the compensation module 11. For example, if the conduction frequency of the first initialization module 12 is set to 120Hz, then the first initialization module 12 will conduct 120 times within 1 second, performing the process of writing the first initialization voltage Vref to the second terminal N1 of the light-emitting module 14 120 times. The light-emitting module 14 will flash 120 times within 1 second. The time interval between two adjacent flashes is shortened, making it less likely to be noticed by the user. Therefore, the flickering problem is improved.

[0055] The compensation module writes a voltage related to the data voltage to the control terminal of the driver module. Therefore, the conduction frequency of the compensation module is equal to the refresh frequency of the pixel circuit. The first initialization module initializes the second terminal of the light-emitting module. When the refresh frequency of the pixel circuit is low, compared to the first initialization module's conduction frequency being equal to the pixel circuit's refresh frequency, in this embodiment, the conduction frequency of the first initialization module is set to be greater than the pixel circuit's refresh frequency. This shortens the time interval between two consecutive complete extinguishing of the light-emitting module, thereby making the user less sensitive to the flickering of the light-emitting module, improving the flickering problem at lower refresh frequencies, and enhancing the display effect.

[0056] Figure 11 A flowchart of another pixel circuit driving method provided in an embodiment of the present invention is shown below. Figure 11 A display frame of the display panel corresponding to the pixel circuit includes a write frame and a hold frame. The method includes: S111: In the first initialization phase of the write frame, the voltage writing module responds to the first scan signal and provides a second initialization voltage to the first end of the coupling module, and the first initialization module responds to the fourth scan signal and provides a first initialization voltage to the second end of the light-emitting module.

[0057] Specifically, the voltage writing module 16 comprises a second initialization module 161 that is turned on in response to the first scan signal S1 to transmit the second initialization voltage Vini to the first terminal of the coupling module 15, thereby resetting the coupling module 15. The first initialization module 12 is turned on in response to the fourth scan signal S4 to provide the first initialization voltage Vref to the second terminal of the light-emitting module 14, thereby resetting the second terminal of the light-emitting module 14.

[0058] S121: During the threshold compensation stage of writing the frame, the second light-emitting control unit responds to the second light-emitting control signal to turn on, so as to transmit the voltage of the second power supply to the second terminal of the driving module, and the compensation module responds to the third scan signal to compensate the threshold voltage of the driving module.

[0059] After the compensation module 11 is turned on, the control terminal g of the drive module 10 and the first terminal d of the drive module 10 are connected. There is a voltage difference between the control terminal and the second terminal s of the drive module 10, so there is charge flow between them. The drive module 10 is turned off when the voltage difference between the control terminal g and the second terminal s of the drive module 10 is equal to the threshold voltage Vth of the drive module 10, thus realizing the compensation of the threshold voltage.

[0060] S131: During the data writing phase of the write frame, the voltage writing module responds to the second scan signal to provide data voltage to the first end of the coupling module, and the coupling module couples the voltage containing the data voltage to the control end of the drive module through the conducting compensation module.

[0061] During the data writing phase of the write frame, the potential jump variable at the first end of the coupling module 15 is Vdata-Vini. Under the coupling effect of the coupling module 15, the voltage of the control terminal g of the corresponding drive module 10 will jump from (V0+Vth) to V0+Vth+(Vdata-Vini)·Cc / (Cc+Cst), thereby realizing the writing of the data voltage Vdata.

[0062] S141: In the first light-emitting stage of writing a frame, the first light-emitting control unit turns on in response to the first light-emitting control signal, and the second light-emitting control unit turns on in response to the second light-emitting control signal.

[0063] After the first light-emitting control unit 131 and the second light-emitting control unit 132 are turned on, a current flow path is formed, and the driving module 10 drives the light-emitting module 14 to emit light according to the driving current I. The driving current I = K(Vg - Vs - Vth). 2 =K((Vdata-Vini)·Cc / (Cc+Cst)) 2 .

[0064] S151: In the second initialization phase of the holding frame, the first initialization module provides a first initialization voltage to the second terminal of the light-emitting module in response to the fourth scan signal, and the compensation module turns off in response to the third scan signal.

[0065] While holding the frame, the first initialization module 12 remains on to reset the second terminal of the light-emitting module 14, the compensation module 11 is turned off to achieve high-frequency reset of the second terminal of the light-emitting module 14, low-frequency reset of the driving mode of the control terminal g of the drive module 10, and the signal of the control terminal of the holding frame drive module 10 remains unchanged to suppress flickering at low refresh rates.

[0066] S161: In the second light-emitting stage of the holding frame, the first light-emitting control unit turns on in response to the first light-emitting control signal, and the second light-emitting control unit turns on in response to the second light-emitting control signal.

[0067] This invention also provides a display panel, including the pixel circuit of any of the above embodiments. The beneficial effects of the display panel are the same as those of the pixel circuit, and will not be described again here.

[0068] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0069] The specific embodiments described above do not constitute a limitation on the scope of protection of this 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 principles of this invention should be included within the scope of protection of this invention.

Claims

1. A pixel circuit, characterized in that, include: The module consists of a driver module, a compensation module, a first initialization module, a light-emitting control module, and a light-emitting module. The first end of the light-emitting module is connected to the first power supply, and the driving module and the light-emitting control module are connected in series between the second end of the light-emitting module and the second power supply. The voltage of the first power supply is greater than the voltage of the second power supply. The first initialization module is used to provide a first initialization voltage to the second terminal of the light-emitting module; The first end of the compensation module is connected to the first end of the drive module, and the second end of the compensation module is connected to the control end of the drive module, for writing a voltage containing data voltage into the control end of the drive module; The conduction frequency of the first initialization module is greater than the conduction frequency of the compensation module.

2. The pixel circuit according to claim 1, characterized in that, A display frame of the display panel corresponding to the pixel circuit includes a write frame and a hold frame; the pixel circuit also includes a coupling module and a voltage write module; The voltage writing module is used to provide a second initialization voltage to the first end of the coupling module in response to a first scan signal during the first initialization phase of the write frame, and is also used to provide a data voltage to the first end of the coupling module in response to a second scan signal during the data writing phase of the write frame; The coupling module is connected to the first end of the driving module and is used to couple the voltage containing the data voltage to the control end of the driving module via the conducting compensation module during the data writing phase of the write frame.

3. The pixel circuit according to claim 2, characterized in that, It also includes a storage module, the first end of which is connected to the control terminal of the drive module, and the second end of which is connected to the second power supply. The storage module is used to store the voltage of the control terminal of the drive module. The light emission control module includes a first light emission control unit and a second light emission control unit. A first terminal of the first light emission control unit is connected to a second terminal of the light emission module, and a second terminal of the first light emission control unit is connected to a first terminal of the driving module. The first light emission control unit is used to turn on in response to a first light emission control signal during the first initialization phase of the write frame and the second initialization phase of the hold frame, so as to transmit the potential of the second terminal of the light emission module to the first terminal of the driving module. It is also used to turn on in response to the first light emission control signal during both the first light emission phase of the write frame and the second light emission phase of the hold frame. The first end of the second light-emitting control unit is connected to the second end of the driving module, and the second end of the second light-emitting control unit is connected to the second power supply. The second light-emitting control unit is used to respond to the second light-emitting control signal being turned on in both the first light-emitting stage of the write frame and the second light-emitting stage of the hold frame. Preferably, the second light-emitting control unit is further configured to turn on in response to the second light-emitting control signal during the threshold compensation phase of the write frame, so as to transmit the voltage of the second power supply to the second terminal of the drive module; The compensation module is used to compensate the threshold voltage of the driving module in response to the third scan signal during the threshold compensation phase of the write frame; in the same write frame, the threshold compensation phase precedes the data writing phase; Preferably, the storage module includes a first capacitor, a first terminal of which is connected to the control terminal of the drive module, and a second terminal of which is connected to the second power supply. The driving module includes a first transistor, the first terminal of which is connected to the second terminal of the first light-emitting control unit, the second terminal of which is connected to the first terminal of the second light-emitting control unit, and the gate of which is connected to the second terminal of the compensation module and the first terminal of the storage module.

4. The pixel circuit according to claim 2 or 3, characterized in that, The voltage writing module includes a second initialization module and a data writing module; The second initialization module is used to provide the second initialization voltage to the first terminal of the coupling module in response to the first scan signal during the first initialization phase of the write frame; The data writing module is used to provide the data voltage to the first end of the coupling module in response to the second scan signal during the data writing phase of the writing frame; Preferably, the second initialization module includes a sixth transistor, the first terminal of the sixth transistor is connected to the second initialization signal line, the second terminal of the sixth transistor is connected to the first terminal of the coupling module, and the gate of the sixth transistor is connected to the first scan signal; The data writing module includes a seventh transistor, the first terminal of which is connected to a data line, the second terminal of which is connected to the first end of the coupling module, and the gate of which is connected to the second scan signal. The coupling module includes a second capacitor, the first end of which is connected to the second initialization module and the data writing module, respectively, and the second end of which is connected to the first end of the driving module.

5. The pixel circuit according to claim 4, characterized in that, The first initialization module is used to provide the first initialization voltage to the second terminal of the light-emitting module in response to the fourth scan signal during the first initialization phase and the threshold compensation phase of the write frame; The fourth scan signal is multiplexed as the first scan signal.

6. The pixel circuit according to claim 4, characterized in that, The light-emitting control module includes a first light-emitting control unit and a second light-emitting control unit; The second light emission control signal is multiplexed into the first scanning signal.

7. The pixel circuit according to claim 2, characterized in that, The first initialization module is also configured to provide a first initialization voltage to the second terminal of the light-emitting module in response to the fourth scan signal during the second initialization phase of the holding frame; The compensation module is used to respond to the third scan signal when the hold frame is turned off.

8. A driving method for a pixel circuit, characterized in that, For driving the pixel circuit according to any one of claims 1-7; The driving method for the pixel circuit includes: The first initialization module provides a first initialization voltage to the second terminal of the light-emitting module; The compensation module writes the voltage containing the data voltage to the control terminal of the driver module; The conduction frequency of the first initialization module is greater than the conduction frequency of the compensation module.

9. The driving method for the pixel circuit according to claim 8, characterized in that, A display frame of the display panel corresponding to the pixel circuit includes a write frame and a hold frame; the pixel circuit also includes a coupling module and a voltage write module; The light-emitting control module includes a first light-emitting control unit and a second light-emitting control unit; The driving method for the pixel circuit further includes: During the first initialization phase of the write frame, the voltage writing module provides a second initialization voltage to the first end of the coupling module in response to the first scan signal, and the first initialization module provides a first initialization voltage to the second end of the light-emitting module in response to the fourth scan signal. During the threshold compensation phase of the written frame, the second light-emitting control unit is turned on in response to the second light-emitting control signal to transmit the voltage of the second power supply to the second terminal of the driving module, and the compensation module compensates the threshold voltage of the driving module in response to the third scan signal. During the data writing phase of the write frame, the voltage writing module responds to the second scan signal to provide a data voltage to the first end of the coupling module, and the coupling module couples the voltage containing the data voltage to the control end of the drive module through the conducting compensation module; During the first light-emitting stage of writing a frame, the first light-emitting control unit turns on in response to the first light-emitting control signal, and the second light-emitting control unit turns on in response to the second light-emitting control signal; During the second initialization phase of the holding frame, the first initialization module provides the first initialization voltage to the second terminal of the light-emitting module in response to the fourth scan signal, and the compensation module turns off in response to the third scan signal; During the second light-emitting phase of the frame holding, the first light-emitting control unit turns on in response to the first light-emitting control signal, and the second light-emitting control unit turns on in response to the second light-emitting control signal.

10. A display panel, characterized in that, Includes the pixel circuit described in any one of claims 1-7.

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