Pixel circuit, driving method thereof and display panel

Abstract

The embodiment of the invention discloses a pixel circuit and a driving method thereof and a display panel, the pixel circuit comprises a driving module, a data write-in module, a first storage unit and a light emitting module, the first storage unit is connected between a first end and a control end of the driving module, the driving module is configured to be switched on in a compensation stage, and the data write-in module is configured to be switched off in a control stage. The first storage unit is charged through the first power line, and voltage information related to threshold voltage of the driving module is stored at the first end of the driving module; the data write-in module is used for writing the data voltage of the current frame into an internal node of the data write-in module in the light emitting stage of the previous frame, and writing the data voltage of the current frame on the internal node into the control end of the driving module in the data write-in stage of the current frame; the driving module is used for driving the light-emitting module to emit light according to voltages of the first end and the control end of the driving module in the light-emitting stage. According to the scheme, the uniformity of display image quality is improved, and the display effect is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a pixel circuit, its driving method, and a display panel. Background Technology

[0002] With the rapid development of display technology, the requirements for display panels are becoming increasingly stringent.

[0003] Currently, the display panels in related technologies suffer from poor display quality and cannot meet customer needs. Summary of the Invention

[0004] This invention provides a pixel circuit, its driving method, and a display panel to improve the display effect of the display panel.

[0005] According to one aspect of the present invention, a pixel circuit is provided, comprising: a driving module, a data writing module, a first storage unit, and a light-emitting module; The driving module and the light-emitting module are connected between the first power line and the second power line. The first storage unit is connected between the first end of the driving module and the control end. The driving module is configured to be turned on during the compensation phase to charge the first storage unit through the first power line and store voltage information related to the threshold voltage of the driving module at the first end of the driving module. The data writing module is connected to the control terminal of the driving module. The data writing module is used to write the data voltage of the current frame to its own internal node during the light emission stage of the previous frame, and to write the data voltage of the current frame on the internal node to the control terminal of the driving module during the data writing stage of the current frame. The driving module is used to drive the light-emitting module to emit light according to the voltage of the first terminal and the control terminal of the driving module during the light-emitting stage.

[0006] Optionally, the pixel circuit further includes an initialization module, a first end of which is connected to an initialization signal line, a second end of which is connected to the control terminal of the driving module, and the control terminal of the initialization module is connected to a first control signal line. The initialization module is used to transmit the initialization voltage on the initialization signal line to the control terminal of the driving module during the initialization phase, and to continuously transmit the initialization voltage to the control terminal of the driving module during the compensation phase. Optionally, the first storage unit is used to couple the voltage change at the first terminal of the driving module to the control terminal of the driving module during the light emission stage; Optionally, the initialization phase of the current frame is located before the compensation phase of the same frame and after the emission phase of the previous frame; Optionally, the data writing phase of the current frame is located after the compensation phase of the current frame and before the light emission phase of the current frame.

[0007] Optionally, the first power supply voltage transmitted on the first power supply line is a variable signal; Optionally, the first power supply voltage includes a first potential and a second potential, and the first power supply voltage is configured to switch from the first potential to the second potential during the initialization phase, and to switch from the second potential to the first potential during the compensation phase; Optionally, the first potential is greater than the second potential; Optionally, the difference between the second potential and the second power supply voltage on the second power supply line is less than the turn-on voltage of the light-emitting module; Optionally, the first power line is further configured to transmit the first power supply voltage having the second potential to the first terminal of the drive module during the initialization phase, wherein the voltage difference between the initialization voltage and the first potential is greater than the threshold voltage of the drive module.

[0008] Optionally, the pixel circuit further includes an emissive control module, wherein the control terminal of the emissive control module is connected to a second control signal line, the first terminal of the emissive control module is connected to the first power line, the second terminal of the emissive control module is connected to the second terminal of the driving module, the first terminal of the driving module is connected to the first terminal of the emissive module, the second terminal of the emissive module is connected to the second power line, and the emissive control module is configured to be turned on during the initialization phase, the compensation phase, and the emissive phase, and turned off during the data writing phase; Optionally, the driving module includes a first transistor, the initialization module includes a second transistor, the light-emitting control module includes a third transistor, the first storage unit includes a first capacitor, and the light-emitting module includes a light-emitting diode; The gate of the third transistor is connected to the second control signal line, the first terminal of the third transistor is connected to the first power supply line, the second terminal of the third transistor is connected to the first terminal of the first transistor, the second terminal of the first transistor is connected to the first terminal of the light-emitting diode, the second terminal of the light-emitting diode is connected to the second power supply line, the first terminal of the first capacitor is connected to the gate of the first transistor, and the second terminal of the first capacitor is connected to the second terminal of the first transistor. The gate of the second transistor is connected to the first control signal line, the first terminal of the second transistor is connected to the initialization signal line, and the second terminal of the second transistor is connected to the gate of the first transistor. Optionally, the first transistor is an N-type transistor.

[0009] Optionally, the data writing module includes a first voltage writing unit, a second voltage writing unit, and a second storage unit; The control terminal of the first voltage writing unit is connected to the scan signal line, the first terminal of the first voltage writing unit is connected to the data line, the second terminal of the first voltage writing unit and the first terminal of the second voltage writing unit are connected to the first node, the second terminal of the second voltage writing unit is connected to the control terminal of the driving module, and the control terminal of the second voltage writing unit is connected to the third control signal line; the first voltage writing unit is used to write the data voltage of the current frame to the first node during the light emission stage of the previous frame, and the second voltage writing unit is used to write the data voltage of the current frame on the first node to the control terminal of the driving module during the current frame; The first end of the second storage unit is connected to the third power line, and the second end of the second storage unit is connected to the first node; Optionally, the internal node includes the first node; Optionally, the first power line is multiplexed as the third power line; Optionally, the first voltage writing unit includes a fourth transistor, the second voltage writing unit includes a fifth transistor, and the second storage unit includes a second capacitor; The first terminal of the fourth transistor is connected to the data line, the second terminal of the fourth transistor is connected to the first node, the gate of the fourth transistor is connected to the scan signal line, the first terminal of the fifth transistor is connected to the first node, the second terminal of the fifth transistor is connected to the control terminal of the drive module, the gate of the fifth transistor is connected to the third control signal line, the first terminal of the second capacitor is connected to the first power line, and the second terminal of the second capacitor is connected to the first node.

[0010] According to another aspect of the present invention, a driving method for a pixel circuit is provided. The pixel circuit includes a driving module, a data writing module, a first storage unit, and a light-emitting module. The driving module and the light-emitting module are connected between a first power line and a second power line. The first storage unit is connected between a first terminal and a control terminal of the driving module. The driving method for the pixel circuit includes: In the first writing stage, the data writing module is controlled to write the data voltage of the current frame to the internal node of the data writing module; During the compensation phase, the first power line is controlled to charge the first storage unit so as to store voltage information related to the threshold voltage of the driving module at the first end of the driving module. In the second writing phase, the data writing module is controlled to write the data voltage of the current frame on the internal node to the control terminal of the driver module; During the light-emitting phase, the control module drives the light-emitting module to emit light according to the voltage at the first terminal and the control terminal of the control module; The first writing stage is the light emission stage of the previous frame, and the second writing stage is the data writing stage of the current frame.

[0011] Optionally, the pixel circuit further includes an initialization module; the driving method of the pixel circuit further includes: During the initialization phase, the control module transmits the initialization voltage on the initialization signal line to the control terminal of the drive module; Optionally, during the compensation phase, the driving method for the pixel circuit further includes: The initialization module is controlled to continuously transmit the initialization voltage to the control terminal of the drive module; Optionally, a frame may include, in sequence, the initialization phase, the compensation phase, the second writing phase, and the light emission phase; Optionally, the data writing module includes a first voltage writing unit, a second voltage writing unit, and a second storage unit. The first end of the first voltage writing unit is connected to a data line, and the second end of the first voltage writing unit and the first end of the second voltage writing unit are connected to a first node. The second end of the second voltage writing unit is connected to the control terminal of the driving module. The first end of the second storage unit is connected to the first power line, and the second end of the second storage unit is connected to the first node. The first writing stage, controlling the data writing module to write the data voltage of the current frame to the internal node of the data writing module, includes: During the first write phase, the first voltage write unit is controlled to write the data voltage of the current frame on the data line to the first node and store it on the second storage unit; Optionally, in the second writing stage, controlling the data writing module to write the data voltage of the current frame on the internal node to the control terminal of the driving module includes: During the second writing phase, the second voltage writing unit is controlled to transmit the data voltage of the current frame on the first node to the control terminal of the driver module.

[0012] Optionally, the first power supply voltage transmitted on the first power line includes a first potential and a second potential, wherein the first potential is greater than the second potential; the pixel circuit further includes a light emission control module. During the initialization phase, controlling the initialization module to transmit the initialization voltage on the initialization signal line to the control terminal of the drive module includes: During the initialization phase, the first power supply voltage transmitted on the first power line is switched from the first potential to the second potential, the initialization module is controlled to transmit the initialization voltage on the initialization signal line to the control terminal of the driving module, and the light emission control module is controlled to transmit the first power supply voltage to the first terminal of the driving module. Optionally, during the compensation phase, controlling the first power line to charge the first terminal of the drive module to store voltage information related to the threshold voltage of the drive module at the first terminal of the drive module includes: During the compensation phase, the first power supply voltage transmitted on the first power line is switched from the second potential to the first potential, the initialization module is controlled to transmit the initialization voltage on the initialization signal line to the control terminal of the driving module, and the first power line is controlled to charge the first terminal of the driving module through the light emission control module until the driving module is turned off. The first storage unit stores voltage information related to the threshold voltage of the driving module. Optionally, during the light-emitting stage, controlling the driving module to drive the light-emitting module to emit light according to the voltage at the first terminal and the control terminal of the driving module includes: During the light-emitting phase, the first power supply voltage transmitted on the first power line is controlled to maintain the first potential, the first storage unit is controlled to couple the voltage change at the first end of the driving module to the control end of the driving module, and the driving module is controlled to drive the light-emitting module to emit light according to the voltage at the first end and the control end of the driving module.

[0013] According to another aspect of the present invention, a display panel is provided, the display panel including the pixel circuit provided in any embodiment of the present invention.

[0014] Optionally, the pixel circuit further includes an initialization module and an emissive control module. The first end of the initialization module is connected to an initialization signal line, and the second end of the initialization module is connected to the control terminal of the driving module. The first end of the emissive control module is connected to the first power line, and the second end of the emissive control module is connected to the second terminal of the driving module. The second terminal of the driving module is connected to the first terminal of the emissive module, and the second terminal of the emissive module is connected to the second power line. The data writing module includes a first voltage writing unit, a second voltage writing unit, and a second storage unit. The first end of the first voltage writing unit is connected to a data line, and the second ends of the first and second voltage writing units are connected to a first node. The second end of the second voltage writing unit is connected to the control terminal of the driving module, and the first end of the second storage unit is connected to the first power line. The second end of the second storage unit is connected to the first node. The display panel further includes multiple scan signal lines, multiple first control signal lines, multiple second control signal lines, and multiple third control signal lines. Each row of the pixel circuit is connected to one scan signal line, one first control signal line, one second control signal line, and one third control signal line. The multiple scan signal lines are used to transmit scan signals to the first voltage writing units in the pixel circuit row by row. The multiple first control signal lines are used to transmit first control signals to the initialization modules in all rows of the pixel circuit simultaneously. The multiple second control signal lines are used to transmit second control signals to the light-emitting control modules in all rows of the pixel circuit simultaneously. The multiple third control signal lines are used to transmit third control signals to the second voltage writing units in all rows of the pixel circuit simultaneously.

[0015] The technical solution provided by this invention writes the data voltage of the current frame to the internal node of the data writing module during the light emission stage of the previous frame, and transmits the data voltage of the current frame on the internal node to the control terminal of the driving module during the data writing stage of the current frame. This utilizes the light emission cycle time for data writing, which helps reduce the data writing time within a frame, thereby shortening the line time for high refresh rate display. Furthermore, threshold voltage compensation is performed before writing the data voltage to the control terminal of the driving module, ensuring that the compensation stage and the data writing stage are independent of each other. This means that the threshold voltage compensation time is unaffected by the data writing stage, allowing the threshold voltage of the driving module to be fully compensated at high refresh rates. This reduces the differences in driving module characteristics corresponding to different pixels, thereby improving the uniformity of display brightness, enhancing the uniformity of display quality, and improving the display effect. In addition, threshold voltage compensation of the driving module can be achieved without setting up an additional compensation module, simplifying the pixel circuit structure.

[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 2This 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 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention; Figure 5 A schematic diagram of the driving timing of a pixel circuit provided in an embodiment of the present invention; Figure 6 A flowchart illustrating a pixel circuit driving method provided in an embodiment of the present invention; Figure 7 A flowchart of another pixel circuit driving method provided in an embodiment of the present invention; Figure 8 A flowchart of another pixel circuit driving method provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of a display panel 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] 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 provided in this embodiment includes: a driving module 110, a data writing module 120, a first storage unit 130, and a light-emitting module 140; The driving module 110 and the light-emitting module 140 are connected between the first power line L1 and the second power line L2. The first storage unit 130 is connected between the first end of the driving module 110 and the control end. The driving module 110 is configured to be turned on during the compensation phase to charge the first storage unit 130 through the first power line L1 and store voltage information related to the threshold voltage of the driving module 110 at the first end of the driving module 110. The data writing module 120 is connected to the control terminal of the driving module 110. The data writing module 120 is used to write the data voltage Vdata of the current frame to its own internal node during the light emission stage of the previous frame, and to write the data voltage Vdata of the current frame on the internal node to the control terminal of the driving module 110 during the data writing stage of the current frame. The driving module 110 is used to drive the light-emitting module 140 to emit light according to the voltage of the first terminal and the control terminal of the driving module 110 during the light-emitting stage.

[0022] Specifically, during the compensation phase, the first storage unit 130 is charged by the first power supply voltage VDD on the first power supply line L1, which increases the voltage at the first terminal of the driving module 110. When the voltage difference between the control terminal and the first terminal of the driving module 110 is equal to the threshold voltage of the driving module 110, the driving module 110 is turned off, and the first storage unit 130 stores the relevant voltage information of the threshold voltage of the driving module 110. This realizes threshold voltage compensation for the driving module 110 without the need to set up a compensation module, which helps to simplify the pixel circuit structure.

[0023] After the threshold voltage compensation of the driving module 110 is completed, the data voltage Vdata of the current frame is written to the control terminal of the driving module 110 through the data writing module 120. Under the coupling effect of the first storage unit, the voltage of the first terminal of the driving module 110 changes synchronously to realize data writing.

[0024] The data writing process is divided into different stages, with the data voltage Vdata written at different locations in each stage, and finally transmitted to the control terminal of the driver module 110. For example, the data writing process includes a first writing stage and a second writing stage. In the first writing stage, the data writing module 120 transmits the data voltage Vdata of the next frame to its own internal node; in the second writing stage, the data writing module 120 transmits the data voltage Vdata of the current frame to the control terminal of the driver module 110. The first writing stage can be the emission stage of the previous frame, and the second writing stage can be the data writing stage of the current frame. That is, the data writing module 120 writes the data voltage Vdata of the current frame to its own internal node during the previous frame, and transmits the data voltage Vdata of the current frame from its internal node to the control terminal of the driver module 110 during the current frame.

[0025] During the light-emitting stage, the driving module 110 generates a driving current based on the voltage of its own control terminal and the first terminal to drive the light-emitting module 140 to emit light.

[0026] The technical solution provided by this invention writes the data voltage Vdata of the current frame to the internal node of the data writing module 120 during the light emission stage of the previous frame, and transmits the data voltage Vdata of the current frame on the internal node to the control terminal of the driving module 110 during the data writing stage of the current frame. This utilizes the light emission cycle time for data writing, which helps reduce the data writing time within a frame, thereby shortening the line time for high refresh rate display. Furthermore, threshold voltage compensation is performed before writing the data voltage Vdata to the control terminal of the driving module 110, ensuring that the compensation stage and the data writing stage are independent of each other. This means that the threshold voltage compensation time is unaffected by the data writing stage, allowing the threshold voltage of the driving module 110 to be fully compensated at high refresh rates. This reduces the differences in the characteristics of the driving module 110 corresponding to different pixels, thus improving the uniformity of display brightness and image quality. In addition, threshold voltage compensation of the driving module 110 can be achieved without the need for an additional compensation module, simplifying the pixel circuit structure.

[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, based on the above embodiments, the pixel circuit further includes an initialization module 160. A first terminal of the initialization module 160 is connected to an initialization signal line, and a second terminal of the initialization module 160 is connected to the control terminal of the driving module 110. The control terminal of the initialization module 160 is connected to a first control signal line, which transmits a first control signal SC1. The first control signal SC1 is a global signal, and all initialization modules 160 in the pixel circuits simultaneously respond to the first control signal SC1 to either turn on or off. The initialization module 160 is used to transmit the initialization voltage Vint on the initialization signal line to the control terminal of the driving module 110 during the initialization phase, and to continuously transmit the initialization voltage Vint to the control terminal of the driving module 110 during the compensation phase.

[0028] In this configuration, the initialization phase of the current frame precedes the compensation phase and follows the emission phase of the previous frame. In other words, the initialization and compensation phases are located between the first and second write phases, with the initialization phase preceding the compensation phase. The first write phase can be the emission phase of the previous frame, and the second write phase can be the data write phase of the current frame. The data write phase of the current frame follows the compensation phase and precedes the emission phase.

[0029] Optionally, the pixel circuit provided in this embodiment further includes a light-emitting control module 150. A first terminal of the light-emitting control module 150 is connected to a first power supply line L1, and a second terminal of the light-emitting control module 150 is connected to a second terminal of a driving module 110. A first terminal of the driving module 110 is connected to a first terminal of a light-emitting module 140, and a second terminal of the light-emitting module 140 is connected to a second power supply line L2. The control terminal of the light-emitting control module 150 is connected to a second control signal line, which is used to transmit a second control signal EMC. The light-emitting control module 150 is configured to be turned on during the initialization phase, compensation phase, and light-emitting phase, and turned off during the data writing phase. The first power supply line L1 can be used to transmit a first power supply voltage VDD, and the second power supply line L2 can be used to transmit a second power supply voltage VSS.

[0030] In this embodiment, the first power supply voltage VDD transmitted on the first power line L1 is a variable signal. The first power supply voltage VDD includes a first potential and a second potential. The first power supply voltage VDD is configured to switch from the first potential to the second potential during the initialization phase and to switch from the second potential to the first potential during the compensation phase.

[0031] Specifically, with Figure 2 Taking the pixel circuit shown as an example, the working process of the pixel circuit includes an initialization stage, a compensation stage, a data writing stage, and a light emission stage.

[0032] During the initialization phase, the initialization module 160 responds to the first control signal SC1 and turns on, transmitting the initialization voltage Vint to the control terminal of the drive module 110 to initialize the control terminal of the drive module 110 and the first terminal of the first storage unit 130. The voltage difference between the initialization voltage Vint and the first potential is greater than the threshold voltage of the drive module 110, at which point the drive module 110 turns on. The first power supply voltage VDD with a second potential transmitted on the first power line L1 is transmitted to the second terminal of the drive module 110 via the light-emitting control module 150 and the drive module 110 to initialize the first terminal of the drive module 110. The voltage at the control terminal of the drive module 110 is the initialization voltage Vint, and the voltage at the first terminal of the drive module 110 is the second potential of the first power supply voltage VDD. The difference between the second potential of the first power supply voltage VDD and the second power supply voltage VSS on the second power line L2 is less than the turn-on voltage of the light-emitting module 140, preventing the light-emitting module 140 from emitting light during the non-light-emitting phase.

[0033] During the compensation phase, the first power supply voltage VDD switches from the second potential to the first potential, and the first power supply voltage VDD charges the first storage cell 130 until the drive module 110 is turned off. The first storage cell 130 stores voltage information associated with the threshold voltage of the drive module 110.

[0034] During the data writing phase, the data writing module 120 writes the current frame's data voltage Vdata stored on its internal node to the control terminal of the drive module 110. Under the coupling effect of the first storage unit 130, the voltage at the first terminal of the drive module 110 changes synchronously.

[0035] During the light-emitting phase, the voltage at the first terminal of the driving module 110 becomes the sum of the second power supply voltage VSS and the voltage across the light-emitting module 140. Under the coupling effect of the first storage unit 130, the voltage change at the first terminal of the driving module 110 is coupled to the control terminal of the driving module 110. The driving module 110 generates a driving current based on the voltage at its control terminal and the first terminal, driving the light-emitting module 140 to emit light.

[0036] Figure 3 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention, with reference to... Figure 3 Based on the above embodiments, optionally, the data writing module 120 includes a first voltage writing unit 1201, a second voltage writing unit 1202, and a second storage unit 1203. The control terminal of the first voltage writing unit 1201 is connected to a scan signal line, which is used to transmit a scan signal SN. The first terminal of the first voltage writing unit 1201 is connected to a data line. The second terminal of the first voltage writing unit 1201 and the first terminal of the second voltage writing unit 1202 are connected to a first node N1. The second terminal of the second voltage writing unit 1202 is connected to the control terminal of the driving module 110. The control terminal of the second voltage writing unit 1202 is connected to the third control signal line, which is used to transmit the third control signal SC2. The first voltage writing unit 1201 is used to write the data voltage Vdata of the current frame to the first node N1 during the light emission stage of the previous frame, and the second voltage writing unit 1202 is used to write the data voltage Vdata of the current frame on the first node N1 to the control terminal of the driving module 110 during the current frame. The first terminal of the second storage unit 1203 is connected to the third power line L3, and the second terminal of the second storage unit 1203 is connected to the first node N1. The first node N1 is an internal node of the data writing module 120.

[0037] Specifically, during the light-emitting stage of the previous frame, such as the light-emitting stage of the (n-1)th frame, the first voltage writing unit 1201 is turned on in response to the scan signal SN, and the second voltage writing unit 1202 is turned off in response to the third control signal SC2. The data voltage Vdata of the nth frame transmitted on the data line is written to the first node N1 and stored in the second storage unit 1203. When the current frame (i.e., the nth frame) arrives, during the data writing stage, the first voltage writing unit 1201 is turned off in response to the scan signal SP, and the second voltage writing unit 1202 is turned on in response to the third control signal SC2. The data voltage Vdata of the current frame stored in the second storage unit 1203 is transmitted to the control terminal of the driver module 110 via the second voltage writing unit 1202, realizing data writing. During the light-emitting stage (the light-emitting stage of the nth frame), the driver module 110 is controlled to drive the light-emitting module 150 to emit light, and simultaneously writes the data voltage Vdata of the (n+1)th frame to the first node N1. Here, n is an integer greater than 1.

[0038] In this embodiment, the data voltage Vdata is written in two steps. The first write occurs during the light emission phase of the previous frame, where the data voltage Vdata for the next frame is written to the first node N1 via the first voltage writing unit 1201. The second write occurs during the data writing phase of the current frame, where the data voltage Vdata for the current frame, stored on the first node N1 in the previous frame, is written to the control terminal of the driver module 110. During the light emission phase of the current frame, the data voltage Vdata corresponding to the next frame is transmitted on the data line and stored in the second storage unit 1203 for use in the next frame. Since the light emission process of the light emission module 140 does not affect the writing process of the data voltage Vdata, the data voltage Vdata for the current frame can be written during the light emission phase of the previous frame, which shortens the data writing time and thus helps to improve the refresh rate.

[0039] Optionally, in this embodiment, the scan signal SN is a progressive scan signal, and the second control signal EMC and the third control signal SC2 are global signals. That is, in the (n-1)th frame, the first voltage writing unit 1201 in each row pixel circuit turns on line by line in response to the scan signal SN, writing the data voltage Vdata corresponding to the nth frame line by line; in the nth frame, the second voltage writing unit 1202 in all row pixel circuits turns on simultaneously in response to the third control signal SC2, transmitting the data voltage Vdata of the nth frame stored on the first node N1 to the control terminal of the driving module 110. During the light emission stage, all row pixel circuits emit light together across the entire screen in response to the second control signal EMC. Compared to the progressive scan scheme, emitting light across the entire screen helps reduce the flicker problem caused by dragging the brightness bar.

[0040] The technical solution provided in this embodiment can greatly shorten the line time by writing the data voltage Vdata of the current frame to the first node N1 line by line during the light emission stage of the previous frame, and writing the data voltage Vdata of the current frame stored on the first node N1 to the control terminal of the driving module 110 at the same time during the data writing stage of the current frame. This can achieve a high refresh rate display.

[0041] Figure 4 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention, specifically... Figure 3 The pixel circuit shown is a detailed schematic diagram of the device structure, for reference. Figure 4 Based on the above embodiments, optionally, the driving module 110 includes a first transistor M1, the initialization module 160 includes a second transistor M2, the light-emitting control module 150 includes a third transistor M3, the first storage unit 130 includes a first capacitor C1, and the light-emitting module 140 includes a light-emitting diode D1; the gate of the third transistor M3 is connected to a second control signal line, the first terminal of the third transistor M3 is connected to a first power supply line L1, the second terminal of the third transistor M3 is connected to the first terminal of the first transistor M1, the second terminal of the first transistor M1 is connected to the first terminal of the light-emitting diode D1, the second terminal of the light-emitting diode D1 is connected to a second power supply line L2, the first terminal of the first capacitor C1 is connected to the gate of the first transistor M1, and the second terminal of the first capacitor C1 is connected to the second terminal of the first transistor M1; the gate of the second transistor M2 is connected to the first control signal line, the first terminal of the second transistor M2 is connected to the initialization signal line, and the second terminal of the second transistor M2 is connected to the gate of the first transistor M1.

[0042] The first voltage writing unit 11201 includes a fourth transistor M4, the second voltage writing unit 1202 includes a fifth transistor M5, and the second storage unit 1203 includes a second capacitor C2. The first terminal of the fourth transistor M4 is connected to the data line, the second terminal of the fourth transistor M4 is connected to the first node N1, the gate of the fourth transistor M4 is connected to the scan signal line, the first terminal of the fifth transistor M5 is connected to the first node N5, the second terminal of the fifth transistor M5 is connected to the control terminal of the driving module 110, the gate of the fifth transistor M5 is connected to the third control signal line, the first terminal of the second capacitor C2 is connected to the first power supply line L1, and the second terminal of the second capacitor C2 is connected to the first node N1.

[0043] In this embodiment, the first transistor M1 is an N-type transistor, and the other transistors can be either N-type transistors or P-type transistors.

[0044] Figure 5 This is a driving timing diagram of a pixel circuit provided in an embodiment of the present invention, which can be applied to... Figure 4 The pixel circuit shown is for reference. Figure 4 and Figure 5Taking an example where all transistors are N-type transistors, the operation of the pixel circuit provided in this embodiment within one frame includes an initialization stage T1, a compensation stage T2, a data writing stage T3, and a light emission stage T4.

[0045] During the light-emitting phase of the (n-1)th frame, the first transistor M1 drives the light-emitting diode D1 to emit light. At the same time, the fourth transistor M4 turns on in response to the scan signal SN (SN-1 corresponds to the fourth transistor M4 of the first row of pixel circuits, SN-2 corresponds to the fourth transistor M4 of the second row of pixel circuits, SP-M corresponds to the fourth transistor M4 of the Mth row of pixel circuits, where M is an integer greater than or equal to 1). The data voltage Vdata of the nth frame is written line by line to the first node N1 and stored on the second capacitor C2.

[0046] In frame n: During the initialization phase T1, the first control signal SC1 is high, the second control signal EMC is high, the third control signal SC2 is low, and the scan signal SN is low. Therefore, the second transistor M2 and the third transistor M3 are turned on. The initialization voltage Vint is transmitted to the gate of the first transistor M1 via the second transistor M2, initializing the gate of the first transistor M1. The first power supply voltage VDD on the first power supply line L1 switches from the first potential to the second potential (i.e., from high level to low level). The first power supply voltage VDD is transmitted to the second terminal of the first transistor M1 via the third transistor M3 and the first transistor M1, initializing the second terminal of the first transistor M1.

[0047] During compensation phase T2, the first power supply voltage VDD switches from the second potential to the first potential (i.e., from low level to high level). The first control signal SC1 is high, the second control signal EMC is high, the third control signal SC2 is low, and the scan signal SN is low. Therefore, the second transistor M2 and the third transistor M3 are turned on. The gate voltage of the first transistor M1 remains at the initialization voltage Vint. The first power supply voltage VDD is high, and the first capacitor C1 is charged through the third transistor M3 and the first transistor M1 until the voltage at the second terminal of the first transistor M1 is Vint - Vth1, at which point the first transistor M1 is turned off. Here, Vth1 is the threshold voltage of the first transistor M1. The first capacitor C1 stores the voltage at the second terminal of the first transistor M1, thus achieving compensation of the threshold voltage of the first transistor M1.

[0048] During the data writing phase T3, the first power supply voltage VDD remains at the first potential, the first control signal SC1 is low, the second control signal EMC is low, the third control signal SC2 is high, and the scan signal SN is low. Therefore, the fifth transistor M5 is turned on. The data voltage Vdata of the current frame stored on the first node N1 is transmitted to the control terminal of the driver module 110 via the fifth transistor M5. The voltage at the control terminal of the driver module 110 changes from the initialization voltage Vint to the data voltage Vdata. Under the coupling effect of the first capacitor C1, the voltage at the second terminal of the first transistor M1 becomes... Where c1 is the capacitance of the first capacitor C1, and coled is the capacitance of the parasitic capacitance of the light-emitting diode D1.

[0049] During the light-emitting phase T4, the first power supply voltage VDD remains at the first potential, the first control signal SC1 is low, the second control signal EMC is high, the third control signal SC2 is low, and the scan signal SN is high. Therefore, the third transistor M3 and the fourth transistor M4 are turned on. The voltage at the second terminal of the first transistor M1 jumps to... Under the coupling effect of the first capacitor C1, the gate voltage of the first transistor M1 becomes The first transistor M1 generates a driving current I based on the voltage between its gate and the second electrode, thereby driving the light-emitting diode D1 to emit light.

[0050] The driving current I can be expressed as: Where μ is the electron mobility of the first transistor M1, Cox is the channel capacitance per unit area of ​​the first transistor M1, W / L is the aspect ratio of the first transistor M1, Vth1 is the threshold voltage of the first transistor M1, c1 is the capacitance of the first capacitor C1, and coled is the capacitance of the parasitic capacitance of the light-emitting diode D1.

[0051] According to the formula for the driving current I, the driving current I is independent of the first power supply voltage VDD, the second power supply voltage VSS, the threshold voltage Vth1 of the first transistor M1, and the voltage across the light-emitting diode D1. Therefore, the pixel circuit provided in this embodiment can compensate for the threshold voltage of the first transistor Q1, as well as the display unevenness caused by the voltage drop (IR-Drop) of the first power supply voltage VDD and the second power supply voltage VSS, and device aging, which is beneficial to improving display quality.

[0052] Meanwhile, during the light emission stage T4, the scanning signal SN is at a low level, the fourth transistor M4 is turned on, and the data voltage Vdata of the (n+1)th frame is written line by line to the first node N1 and stored on the second capacitor C2.

[0053] It should be understood that in this embodiment, all row pixel circuits simultaneously undergo initialization phase T1, compensation phase T2, data writing phase T3, and light emission phase T4. The initialization phase T1, compensation phase T2, and data writing phase T3 are all located within the blanking phase. The total time of this blanking phase is less than the row time, which allows for more thorough initialization of the drive module 110 control terminal and more adequate threshold voltage compensation, thus improving the display effect.

[0054] Optionally, embodiments of the present invention also provide a driving method for a pixel circuit, which can be used to drive the pixel circuit provided in any embodiment of the present invention. Figure 6 A flowchart of a pixel circuit driving method provided in an embodiment of the present invention is shown below. Figure 6 The pixel circuit driving method provided in this embodiment includes: S110. In the first writing stage, the control data writing module writes the data voltage of the current frame to the internal node of the data writing module.

[0055] S120. During the compensation phase, the first power line is controlled to charge the first storage cell so as to store the voltage information related to the threshold voltage of the drive module at the first end of the drive module.

[0056] S130. In the second writing stage, the control data writing module writes the data voltage of the current frame on the internal node to the control terminal of the drive module.

[0057] S140. During the light-emitting stage, the control drive module drives the light-emitting module to emit light according to the voltage at the first terminal and the control terminal of the drive module.

[0058] The first writing stage is the light emission stage of the previous frame, and the second writing stage is the data writing stage of the current frame.

[0059] The technical solution provided by this invention writes the data voltage of the current frame to the internal node of the data writing module during the light emission stage of the previous frame, and transmits the data voltage of the current frame on the internal node to the control terminal of the driving module during the data writing stage of the current frame. This utilizes the light emission cycle time for data writing, which helps reduce the data writing time within a frame, thereby shortening the line time for high refresh rate display. Furthermore, threshold voltage compensation is performed before writing the data voltage to the control terminal of the driving module, ensuring that the compensation stage and the data writing stage are independent of each other. This means that the threshold voltage compensation time is unaffected by the data writing stage, allowing the threshold voltage of the driving module to be fully compensated at high refresh rates. This reduces the differences in driving module characteristics corresponding to different pixels, thus improving the uniformity of display brightness and image quality. In addition, threshold voltage compensation of the driving module can be achieved without setting up an additional compensation module, simplifying the pixel circuit structure.

[0060] Figure 7 A flowchart of another pixel circuit driving method provided in an embodiment of the present invention is shown below. Figure 3 and Figure 7 The pixel circuit driving method provided in this embodiment includes: S1101. In the first writing stage, the first voltage writing unit is controlled to write the data voltage of the current frame on the data line to the first node and store it on the second storage unit.

[0061] S210. During the initialization phase, the control initialization module transmits the initialization voltage on the initialization signal line to the control terminal of the drive module.

[0062] S1201. During the compensation phase, the control initialization module continuously transmits the initialization voltage to the control terminal of the drive module and controls the first power line to charge the first storage unit, so as to store the voltage information related to the threshold voltage of the drive module at the first terminal of the drive module.

[0063] S1301, In the second writing stage, the second voltage writing unit is controlled to transmit the data voltage of the current frame on the first node to the control terminal of the driver module.

[0064] S140. During the light-emitting stage, the control drive module drives the light-emitting module to emit light according to the voltage at the first terminal and the control terminal of the drive module.

[0065] Figure 8 A flowchart of another pixel circuit driving method provided in an embodiment of the present invention is shown below. Figure 3 and Figure 8 The pixel circuit driving method provided in this embodiment includes: S1101. In the first writing stage, the first voltage writing unit is controlled to write the data voltage of the current frame on the data line to the first node and store it on the second storage unit.

[0066] S2101. During the initialization phase, the first power supply voltage transmitted on the first power supply line is switched from the first potential to the second potential. The initialization module transmits the initialization voltage on the initialization signal line to the control terminal of the driver module, and the light emission control module transmits the first power supply voltage to the first terminal of the driver module.

[0067] S1202. During the compensation phase, the first power supply voltage transmitted on the first power supply line is switched from the second potential to the first potential. The initialization module transmits the initialization voltage on the initialization signal line to the control terminal of the drive module. The first power supply line is controlled to charge the first terminal of the drive module through the light emission control module until the drive module is turned off. The first storage unit stores voltage information related to the threshold voltage of the drive module.

[0068] S1301, In the second writing stage, the second voltage writing unit is controlled to transmit the data voltage of the current frame on the first node to the control terminal of the driver module.

[0069] S1401. During the light-emitting stage, the first power supply voltage transmitted on the first power supply line is controlled to maintain a first potential, the first storage unit is controlled to couple the voltage change at the first end of the driving module to the control end of the driving module, and the driving module is controlled to drive the light-emitting module to emit light according to the voltage at the first end of the driving module and the control end.

[0070] During the initialization phase, the control initialization module 160 and the light emission control module 150 are turned on, and the first power supply voltage VDD on the first power line L1 is switched from the first potential to the second potential.

[0071] During the compensation phase, the control initialization module 160 and the light emission control module 150 are turned on, and the first power supply voltage VDD on the first power line L1 is switched from the second potential to the first potential.

[0072] During the data writing stage (second voltage writing stage), the second voltage writing unit 1202 is turned on, and the first power supply voltage VDD is kept at the first potential.

[0073] During the light-emitting stage, the light-emitting control module 150 and the first voltage writing unit 1201 are turned on, and the first power supply voltage VDD is maintained at the first potential.

[0074] In this embodiment, Figure 7 and Figure 8 The specific working principle of the driving method for the pixel circuit shown can be found in the above embodiments. Figure 3The relevant descriptions have the same beneficial effects, and will not be repeated here.

[0075] Optionally, embodiments of the present invention also provide a display panel, which includes the pixel circuit provided in any embodiment of the present invention, and therefore the display panel also has the beneficial effects described in any of the above embodiments.

[0076] Figure 9 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, with reference to... Figure 3 and Figure 9 The display panel 300 provided in this embodiment includes a gate driving circuit 310 and multiple scan signal lines GL. The gate driving circuit 310 is connected to the multiple scan signal lines GL. The gate driving circuit 310 is used to output scan signals SN step by step and transmit them to the pixel circuit of the corresponding row through the scan signal lines GL. Each scan signal line GL is connected to the control terminal of the first voltage writing unit 1201 in a row of pixel circuits.

[0077] Optionally, the display panel further includes multiple first control signal lines, multiple second control signal lines, and multiple third control signal lines (not shown in the figure). The first control signal lines are connected to the control terminal of the initialization module 160, the second control signal lines are connected to the control terminal of the light emission control module 150, and the third control signal lines are connected to the control terminal of the second voltage writing unit 1202. Each row of pixel circuits is connected to one first control signal line, one second control signal line, and one third control signal line. The multiple first control signal lines are used to simultaneously transmit the first control signal SC1 to the initialization module 160 in all row pixel circuits; the multiple second control signal lines are used to simultaneously transmit the second control signal EMC to the light emission control module 150 in all row pixel circuits; and the multiple third control signal lines are used to simultaneously transmit the third control signal SC2 to the second voltage writing unit 1202 in all row pixel circuits.

[0078] Optionally, the display panel provided in this embodiment further includes a chip bonding area 320, which is used to bond a driver chip. A first control signal line, multiple second control signal lines, and multiple third control signal lines are respectively connected to the chip bonding area 320 to provide corresponding control signals through the driver chip disposed in the chip bonding area 320. Therefore, in this embodiment, only one set of gate driving circuits 310 is needed, which is beneficial for achieving a narrow bezel effect in the display panel 300.

[0079] In this embodiment, the display panel 300 can be applied to mobile phones or any electronic product with display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control equipment, touch interactive terminals, etc. This embodiment of the invention does not impose any special limitations on these.

[0080] 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.

[0081] 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 data writing module, a first storage unit, and a light-emitting module. The driving module and the light-emitting module are connected between the first power line and the second power line. The first storage unit is connected between the first end of the driving module and the control end. The driving module is configured to be turned on during the compensation phase to charge the first storage unit through the first power line and store voltage information related to the threshold voltage of the driving module at the first end of the driving module. The data writing module is connected to the control terminal of the driving module. The data writing module is used to write the data voltage of the current frame to its own internal node during the light emission stage of the previous frame, and to write the data voltage of the current frame on the internal node to the control terminal of the driving module during the data writing stage of the current frame. The driving module is used to drive the light-emitting module to emit light according to the voltage of the first terminal and the control terminal of the driving module during the light-emitting stage.

2. The pixel circuit according to claim 1, characterized in that, The pixel circuit further includes an initialization module. The first end of the initialization module is connected to an initialization signal line, and the second end of the initialization module is connected to the control terminal of the driving module. The control terminal of the initialization module is connected to a first control signal line. The initialization module is used to transmit the initialization voltage on the initialization signal line to the control terminal of the driving module during the initialization phase, and to continuously transmit the initialization voltage to the control terminal of the driving module during the compensation phase. Preferably, the first storage unit is used to couple the voltage change at the first terminal of the driving module to the control terminal of the driving module during the light-emitting stage; Preferably, the initialization phase of the current frame is located before the compensation phase of the same frame and after the emission phase of the previous frame; Preferably, the data writing phase of the current frame is located after the compensation phase of the current frame and before the light emission phase of the current frame.

3. The pixel circuit according to claim 2, characterized in that, The first power supply voltage transmitted on the first power supply line is a variable signal; Preferably, the first power supply voltage includes a first potential and a second potential, and the first power supply voltage is configured to switch from the first potential to the second potential during the initialization phase, and to switch from the second potential to the first potential during the compensation phase; Preferably, the first potential is greater than the second potential; Preferably, the difference between the second potential and the second power supply voltage on the second power supply line is less than the turn-on voltage of the light-emitting module; Preferably, the first power line is further configured to transmit the first power supply voltage having the second potential to the first terminal of the drive module during the initialization phase, wherein the voltage difference between the initialization voltage and the first potential is greater than the threshold voltage of the drive module.

4. The pixel circuit according to claim 2, characterized in that, The pixel circuit further includes an emissive control module. The control terminal of the emissive control module is connected to a second control signal line. The first terminal of the emissive control module is connected to the first power line. The second terminal of the emissive control module is connected to the second terminal of the driving module. The first terminal of the driving module is connected to the first terminal of the emissive module. The second terminal of the emissive module is connected to the second power line. The emissive control module is configured to be turned on during the initialization phase, the compensation phase, and the emissive phase, and turned off during the data writing phase. Preferably, the driving module includes a first transistor, the initialization module includes a second transistor, the light-emitting control module includes a third transistor, the first storage unit includes a first capacitor, and the light-emitting module includes a light-emitting diode; The gate of the third transistor is connected to the second control signal line, the first terminal of the third transistor is connected to the first power supply line, the second terminal of the third transistor is connected to the first terminal of the first transistor, the second terminal of the first transistor is connected to the first terminal of the light-emitting diode, the second terminal of the light-emitting diode is connected to the second power supply line, the first terminal of the first capacitor is connected to the gate of the first transistor, and the second terminal of the first capacitor is connected to the second terminal of the first transistor. The gate of the second transistor is connected to the first control signal line, the first terminal of the second transistor is connected to the initialization signal line, and the second terminal of the second transistor is connected to the gate of the first transistor. Preferably, the first transistor is an N-type transistor.

5. The pixel circuit according to claim 1, characterized in that, The data writing module includes a first voltage writing unit, a second voltage writing unit, and a second storage unit; The control terminal of the first voltage writing unit is connected to the scan signal line, the first terminal of the first voltage writing unit is connected to the data line, the second terminal of the first voltage writing unit and the first terminal of the second voltage writing unit are connected to the first node, the second terminal of the second voltage writing unit is connected to the control terminal of the driving module, and the control terminal of the second voltage writing unit is connected to the third control signal line; the first voltage writing unit is used to write the data voltage of the current frame to the first node during the light emission stage of the previous frame, and the second voltage writing unit is used to write the data voltage of the current frame on the first node to the control terminal of the driving module during the current frame; The first end of the second storage unit is connected to the third power line, and the second end of the second storage unit is connected to the first node; Preferably, the internal node includes the first node; Preferably, the first power line is reused as the third power line; Preferably, the first voltage writing unit includes a fourth transistor, the second voltage writing unit includes a fifth transistor, and the second storage unit includes a second capacitor; The first terminal of the fourth transistor is connected to the data line, the second terminal of the fourth transistor is connected to the first node, the gate of the fourth transistor is connected to the scan signal line, the first terminal of the fifth transistor is connected to the first node, the second terminal of the fifth transistor is connected to the control terminal of the drive module, the gate of the fifth transistor is connected to the third control signal line, the first terminal of the second capacitor is connected to the first power line, and the second terminal of the second capacitor is connected to the first node.

6. A driving method for a pixel circuit, characterized in that, The pixel circuit includes a driving module, a data writing module, a first storage unit, and a light-emitting module. The driving module and the light-emitting module are connected between a first power line and a second power line, and the first storage unit is connected between a first end and a control end of the driving module. The driving method for the pixel circuit includes: In the first writing stage, the data writing module is controlled to write the data voltage of the current frame to the internal node of the data writing module; During the compensation phase, the first power line is controlled to charge the first storage unit so as to store voltage information related to the threshold voltage of the driving module at the first end of the driving module. In the second writing phase, the data writing module is controlled to write the data voltage of the current frame on the internal node to the control terminal of the driver module; During the light-emitting phase, the control module drives the light-emitting module to emit light according to the voltage at the first terminal and the control terminal of the control module; The first writing stage is the light emission stage of the previous frame, and the second writing stage is the data writing stage of the current frame.

7. The driving method for the pixel circuit according to claim 6, characterized in that, The pixel circuit also includes an initialization module; The driving method for the pixel circuit further includes: During the initialization phase, the control module transmits the initialization voltage on the initialization signal line to the control terminal of the drive module; Preferably, during the compensation phase, the driving method for the pixel circuit further includes: The initialization module is controlled to continuously transmit the initialization voltage to the control terminal of the drive module; Preferably, a frame includes, in sequence, the initialization phase, the compensation phase, the second writing phase, and the light emission phase; Preferably, the data writing module includes a first voltage writing unit, a second voltage writing unit, and a second storage unit. A first end of the first voltage writing unit is connected to a data line, and a second end of the first voltage writing unit and a first end of the second voltage writing unit are connected to a first node. A second end of the second voltage writing unit is connected to the control terminal of the driving module. A first end of the second storage unit is connected to the first power line, and a second end of the second storage unit is connected to the first node. The first writing stage, controlling the data writing module to write the data voltage of the current frame to the internal node of the data writing module, includes: During the first write phase, the first voltage write unit is controlled to write the data voltage of the current frame on the data line to the first node and store it on the second storage unit; Preferably, in the second writing stage, controlling the data writing module to write the data voltage of the current frame on the internal node to the control terminal of the driving module includes: During the second writing phase, the second voltage writing unit is controlled to transmit the data voltage of the current frame on the first node to the control terminal of the driver module.

8. The driving method for the pixel circuit according to claim 7, characterized in that, The first power supply voltage transmitted on the first power line includes a first potential and a second potential, wherein the first potential is greater than the second potential; the pixel circuit also includes a light emission control module. During the initialization phase, controlling the initialization module to transmit the initialization voltage on the initialization signal line to the control terminal of the drive module includes: During the initialization phase, the first power supply voltage transmitted on the first power line is switched from the first potential to the second potential, the initialization module is controlled to transmit the initialization voltage on the initialization signal line to the control terminal of the driving module, and the light emission control module is controlled to transmit the first power supply voltage to the first terminal of the driving module. Preferably, during the compensation phase, controlling the first power line to charge the first terminal of the drive module to store voltage information related to the threshold voltage of the drive module at the first terminal of the drive module includes: During the compensation phase, the first power supply voltage transmitted on the first power line is switched from the second potential to the first potential, the initialization module is controlled to transmit the initialization voltage on the initialization signal line to the control terminal of the driving module, and the first power line is controlled to charge the first terminal of the driving module through the light emission control module until the driving module is turned off. The first storage unit stores voltage information related to the threshold voltage of the driving module. Preferably, during the light-emitting stage, controlling the driving module to drive the light-emitting module to emit light according to the voltage at the first terminal and the control terminal of the driving module includes: During the light-emitting phase, the first power supply voltage transmitted on the first power line is controlled to maintain the first potential, the first storage unit is controlled to couple the voltage change at the first end of the driving module to the control end of the driving module, and the driving module is controlled to drive the light-emitting module to emit light according to the voltage at the first end and the control end of the driving module.

9. A display panel, characterized in that, Includes the pixel circuit described in any one of claims 1-5.

10. The display panel according to claim 9, characterized in that, The pixel circuit further includes an initialization module and an emissive control module. The first end of the initialization module is connected to an initialization signal line, and the second end of the initialization module is connected to the control terminal of the driving module. The first end of the emissive control module is connected to the first power line, and the second end of the emissive control module is connected to the second end of the driving module. The second end of the driving module is connected to the first end of the emissive module, and the second end of the emissive module is connected to the second power line. The data writing module includes a first voltage writing unit, a second voltage writing unit, and a second storage unit. The first end of the first voltage writing unit is connected to a data line, and the second end of the first voltage writing unit and the first end of the second voltage writing unit are connected to a first node. The second end of the second voltage writing unit is connected to the control terminal of the driving module. The first end of the second storage unit is connected to the first power line, and the second end of the second storage unit is connected to the first node. The display panel further includes multiple scan signal lines, multiple first control signal lines, multiple second control signal lines, and multiple third control signal lines. Each row of the pixel circuit is connected to one scan signal line, one first control signal line, one second control signal line, and one third control signal line. The multiple scan signal lines are used to transmit scan signals to the first voltage writing units in the pixel circuit row by row. The multiple first control signal lines are used to transmit first control signals to the initialization modules in all rows of the pixel circuit simultaneously. The multiple second control signal lines are used to transmit second control signals to the light-emitting control modules in all rows of the pixel circuit simultaneously. The multiple third control signal lines are used to transmit third control signals to the second voltage writing units in all rows of the pixel circuit simultaneously.

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