WO2020199296A1 - Pixel driving circuit and display panel - Google Patents

Abstract

A pixel driving circuit (1) and a display panel. The pixel driving circuit (1) comprises: a first transistor (T1), a second transistor (T2), a third transistor (T3), a fourth transistor (T4), a fifth transistor (T5), a sixth transistor (T6), and a storage capacitor (C1); and when a third driving signal (G) is turned on, a drain of the fourth transistor (T4) applies, to a first end of the storage capacitor (C1), a first power supply signal (ELVDD) together with the threshold voltage of the fourth transistor (T4), so as to cancel the threshold voltage of the fourth transistor (T4).

Description

Pixel driving circuit and display panel Technical field

This application relates to the field of display technology, specifically a pixel drive circuit and a compensation method of the pixel drive circuit.

Background technique

In the prior art, most of the transistors in the pixel driving circuit are low-temperature polysilicon thin film transistors or oxide thin film transistors. Compared with general amorphous silicon thin film transistors, low-temperature polysilicon thin film transistors and oxide thin film transistors have higher mobility and more stable characteristics, and are more suitable for active-matrix organic light-emitting diodes (Active-matrix organic light-emitting diodes). diode, AMOLED) is displaying.

However, due to the limitations of the crystallization process, low-temperature polysilicon thin film transistors fabricated on large-area glass substrates often have non-uniformities in electrical parameters such as threshold voltage and mobility. This non-uniformity will be transformed into a difference in driving current and brightness of an organic light emitting diode (OLED) device, which is perceived by the human eye, that is, the phenomenon of color unevenness. Although oxide thin film transistors have better process uniformity, they are similar to amorphous silicon thin film transistors. Under long-term pressure and high temperature, their threshold voltage will drift, resulting in different display images. Different threshold drifts will cause differences in display brightness. This difference is related to the previously displayed image, so it often appears as an afterimage phenomenon.

technical problem

The main technical problem to be solved by this application is how to compensate the threshold voltage change of the driving transistor, improve the light emission uniformity of the light emitting device, and thereby improve the image quality.

Technical solutions

In the first aspect, the present application provides a pixel driving circuit, including: a storage capacitor, a first receiving module, a second receiving module, a reset module, a compensation module, and a light emitting module; the first receiving module, the second receiving module The module, the reset module and the compensation module are all connected to the storage capacitor, and the compensation module is connected to the light emitting module;

among them,

A first end of the storage capacitor is connected to a first node, and a second end of the storage capacitor is connected to a second node;

The first receiving module is configured to receive a first driving signal and transmit the data signal to the second node under the control of the first driving signal;

The second receiving module is configured to receive a first driving signal and transmit a reference signal to the second node under the control of the first driving signal;

The reset module is configured to receive the second drive signal and transmit a reset signal to the first node under the control of the second drive signal;

The compensation module is configured to receive a third drive signal and perform threshold voltage compensation under the control of the third drive signal;

The light emitting module is used for receiving a first driving signal and emitting light under the control of the first driving signal.

In the pixel driving circuit provided by the present application, the first receiving module includes: a first transistor;

The control terminal of the first transistor is connected to the first drive signal, the first terminal of the first transistor is connected to the data signal, and the second terminal of the first transistor is connected to the second node.

In the pixel driving circuit provided in the present application, the second receiving module includes: a second transistor;

The control terminal of the second transistor is connected to the first driving signal, the first terminal of the second transistor is connected to the reference signal, and the second terminal of the second transistor is connected to the second node.

In the pixel driving circuit provided by the present application, the reset module includes: a third transistor:

The control terminal of the third transistor is connected to the second drive signal, the first terminal of the third transistor is connected to the reset signal, and the second terminal of the third transistor is connected to the first node.

In the pixel driving circuit provided by the present application, the compensation module includes: a fourth transistor and a fifth transistor;

The control terminal of the fourth transistor is connected to the first node, the first terminal of the fourth transistor is connected to a first power signal, and the second terminal of the fourth transistor and the first terminal of the fifth transistor are connected. The terminals are all connected to the third node, the second terminal of the fifth transistor is connected to the first node, and the control terminal of the fifth transistor is connected to the third drive signal.

In the pixel driving circuit provided by the present application, the light-emitting module includes: a sixth transistor and a light-emitting device;

The control terminal of the sixth transistor is connected to the first drive signal, the first terminal of the sixth transistor is connected to the third node, and the second terminal of the sixth transistor is connected to the anode of the light emitting device. Connected, the cathode of the light-emitting device is connected with the second power signal.

In the pixel driving circuit provided by the present application, the first transistor is used to control the transmission of the data signal; the second transistor is used to control the transmission of the reference signal; the third transistor is used to control the transmission of the reference signal. The transmission of the reset signal; the fourth transistor is used to determine the driving current of the pixel drive circuit; the fifth transistor is used to control the on and off of the second terminal and the control terminal of the second transistor; the sixth transistor is used To transmit the driving current from the fourth transistor to the light emitting device.

In the pixel driving circuit provided by the present application, the first transistor is an NMOS transistor, and the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all It is a PMOS tube.

In the pixel driving circuit provided by the present application, the driving timing of the pixel driving circuit includes:

Reset stage, reset the first end and the second end of the storage capacitor;

In the compensation phase, the threshold voltage of the fourth transistor is captured and stored in the storage capacitor;

In the light-emitting stage, the pixel driving circuit generates a driving current and supplies it to the light-emitting device for driving the light-emitting display of the light-emitting device.

In the pixel drive circuit provided by the present application, in the reset phase, the first drive signal is a high-level signal, the second drive signal is a low-level signal, and the third drive signal is a high-level signal. Signal, the third transistor is turned on, the first transistor is turned on, the data signal is transmitted to the second terminal of the storage capacitor, and the reset signal is transmitted to the first terminal of the storage capacitor.

In the pixel drive circuit provided by the present application, in the compensation stage, the first drive signal is a high-level signal, the second drive signal is a high-level signal, and the third drive signal is a low-level signal. Level signal, the fourth transistor and the fifth transistor are turned on, and the first power signal charges the storage capacitor through the fourth transistor and the fifth transistor until the fourth transistor is connected to its control terminal When the voltage difference of the first terminal is equal to its threshold voltage, it is cut off.

In the pixel drive circuit provided by the present application, in the light-emitting phase, the first drive signal is a low-level signal, the second drive signal is a high-level signal, and the third drive signal is a high-level signal. When the signal is flat, the second transistor is turned on, and the reference signal is transmitted to the second node through the second transistor; the sixth transistor is turned on, and the light emitting device emits light.

In the second aspect, the present application provides a pixel driving circuit, including: a storage capacitor, a first receiving module, a second receiving module, a reset module, a compensation module, and a light emitting module; the first receiving module, the second receiving module The module, the reset module and the compensation module are all connected to the storage capacitor, and the compensation module is connected to the light emitting module;

Wherein, the compensation module is used for receiving a third driving signal and performing threshold voltage compensation under the control of the third driving signal.

In the pixel driving circuit provided by the present application, the first end of the storage capacitor is connected to a first node, and the second end of the storage capacitor is connected to a second node;

The first receiving module is configured to receive a first driving signal and transmit the data signal to the second node under the control of the first driving signal;

The second receiving module is configured to receive a first driving signal and transmit a reference signal to the second node under the control of the first driving signal;

The reset module is configured to receive the second drive signal and transmit a reset signal to the first node under the control of the second drive signal;

The light emitting module is used for receiving a first driving signal and emitting light under the control of the first driving signal.

In the pixel driving circuit provided by the present application, the first receiving module includes: a first transistor;

The control terminal of the first transistor is connected to the first drive signal, the first terminal of the first transistor is connected to the data signal, and the second terminal of the first transistor is connected to the second node.

In the pixel driving circuit provided in the present application, the second receiving module includes: a second transistor;

The control terminal of the second transistor is connected to the first driving signal, the first terminal of the second transistor is connected to the reference signal, and the second terminal of the second transistor is connected to the second node.

In the pixel driving circuit provided by the present application, the reset module includes: a third transistor:

The control terminal of the third transistor is connected to the second drive signal, the first terminal of the third transistor is connected to the reset signal, and the second terminal of the third transistor is connected to the first node.

In the pixel driving circuit provided by the present application, the compensation module includes: a fourth transistor and a fifth transistor;

The control terminal of the fourth transistor is connected to the first node, the first terminal of the fourth transistor is connected to a first power signal, and the second terminal of the fourth transistor and the first terminal of the fifth transistor are connected. The terminals are all connected to the third node, the second terminal of the fifth transistor is connected to the first node, and the control terminal of the fifth transistor is connected to the third drive signal.

In the pixel driving circuit provided by the present application, the light-emitting module includes: a sixth transistor and a light-emitting device;

The control terminal of the sixth transistor is connected to the first drive signal, the first terminal of the sixth transistor is connected to the third node, and the second terminal of the sixth transistor is connected to the anode of the light emitting device. Connected, the cathode of the light-emitting device is connected with the second power signal.

In the pixel driving circuit provided by the present application, the first transistor is used to control the transmission of the data signal; the second transistor is used to control the transmission of the reference signal; the third transistor is used to control the transmission of the reference signal. The transmission of the reset signal; the fourth transistor is used to determine the driving current of the pixel drive circuit; the fifth transistor is used to control the on and off of the second terminal and the control terminal of the second transistor; the sixth transistor is used To transmit the driving current from the fourth transistor to the light emitting device.

In the pixel driving circuit provided by the present application, the first transistor is an NMOS transistor, and the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all It is a PMOS tube.

In the pixel driving circuit provided by the present application, the driving timing of the pixel driving circuit includes:

Reset stage, reset the first end and the second end of the storage capacitor;

In the compensation phase, the threshold voltage of the fourth transistor is captured and stored in the storage capacitor;

In the light-emitting stage, the pixel driving circuit generates a driving current and supplies it to the light-emitting device for driving the light-emitting display of the light-emitting device.

In the pixel drive circuit provided by the present application, in the reset phase, the first drive signal is a high-level signal, the second drive signal is a low-level signal, and the third drive signal is a high-level signal. Signal, the third transistor is turned on, the first transistor is turned on, the data signal is transmitted to the second terminal of the storage capacitor, and the reset signal is transmitted to the first terminal of the storage capacitor.

In the pixel drive circuit provided by the present application, in the compensation stage, the first drive signal is a high-level signal, the second drive signal is a high-level signal, and the third drive signal is a low-level signal. Level signal, the fourth transistor and the fifth transistor are turned on, and the first power signal charges the storage capacitor through the fourth transistor and the fifth transistor until the fourth transistor is connected to its control terminal When the voltage difference of the first terminal is equal to its threshold voltage, it is cut off.

In the pixel drive circuit provided by the present application, in the light-emitting phase, the first drive signal is a low-level signal, the second drive signal is a high-level signal, and the third drive signal is a high-level signal. When the signal is flat, the second transistor is turned on, and the reference signal is transmitted to the second node through the second transistor; the sixth transistor is turned on, and the light emitting device emits light.

In a third aspect, the present application provides a display panel including a pixel drive circuit, the pixel drive circuit includes a storage capacitor, a first receiving module, a second receiving module, a reset module, a compensation module, and a light emitting module; the first receiving module The module, the second receiving module, the reset module, and the compensation module are all connected to the storage capacitor, and the compensation module is connected to the light emitting module;

Wherein, the compensation module is used for receiving a third driving signal and performing threshold voltage compensation under the control of the third driving signal.

Beneficial effect

The beneficial effect of the present application is that it can compensate for the change of the threshold voltage of the fourth transistor, improve the light emission uniformity of the light emitting device, and thereby improve the image quality.

Description of the drawings

In order to explain the embodiments or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a pixel driving circuit provided by this application;

2 is a schematic diagram of the principle of the pixel driving circuit provided by this application;

3 is a timing diagram of driving signals of the pixel driving circuit provided by this application;

4 is a schematic diagram of the current path of the pixel driving circuit provided by this application in the reset phase under the driving timing shown in FIG. 3;

FIG. 5 is a schematic diagram of the current path of the pixel driving circuit provided by this application in the compensation stage under the driving timing shown in FIG. 3;

FIG. 6 is a schematic diagram of the current path of the pixel driving circuit provided by this application in the light-emitting phase under the driving timing shown in FIG. 3.

Embodiments of the invention

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The following embodiments described with reference to the drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation to the present application.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a pixel driving circuit provided by this application. The present application provides a pixel driving circuit 1 including a storage capacitor C1, a first receiving module 11, a second receiving module 12, a reset module 13, a compensation module 14, and a light emitting module 15.

The first receiving module 11, the second receiving module 12, the reset module 13 and the compensation module 14 are all connected to the storage capacitor C1, and the compensation module 14 is connected to the light emitting module 15.

Further, the first end of the storage capacitor 10 is connected to the first node N1, and the second end of the storage capacitor C1 is connected to the second node N2. The first receiving module 11 is used for receiving the first driving signal EM and transmitting the data signal D to the second node under the control of the first driving signal EM. The second receiving module 12 is configured to receive the first driving signal EM and transmit the reference signal Ref to the second node N2 under the control of the first driving signal EM. The reset module 13 is used for receiving the second driving signal R and transmitting the reset signal int to the first node N1 under the control of the second driving signal R. The compensation module 14 is used for receiving the third driving signal G and performing threshold voltage compensation under the control of the third driving signal G. The light emitting module 15 is used for receiving the first driving signal EM and emitting light under the control of the first driving signal EM.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of the principle of the pixel driving circuit provided by this application. As shown in FIG. 2, the pixel driving circuit 1 includes: a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a storage capacitor C1, and a light emitting device D2. Among them, the fourth transistor T4 is a driving transistor, the fourth transistor T4 is used to determine the driving current of the pixel driving circuit, and the light-emitting device D2 is used to emit light in response to the driving current.

It should be noted that the transistors used in the embodiments of the present application may be thin film transistors or field effect transistors or other devices with the same characteristics. In addition, the transistors used in the embodiments of the present application may include two types: P-type transistors and/or N-type transistors. The P-type transistor is turned on when the control terminal is at a low level and turned off when the control terminal is at a high level. To turn on when the control terminal is at a high level, and turn off when the control terminal is at a low level.

In some embodiments, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, and the sixth transistor T6 are all PMOS transistors, and the first transistor T1 is an NMOS transistor.

Please continue to refer to FIG. 2, the first receiving module 11 includes a first transistor T1. The control terminal of the first transistor T1 is connected to the first driving signal EM, the first terminal of the first transistor T1 is connected to the data signal D, and the second terminal of the first transistor T1 is connected to the second node N2.

The second receiving module 12 includes a second transistor T2. The control terminal of the second transistor T2 is connected to the first driving signal EM, the first terminal of the second transistor T2 is connected to the reference signal Ref, and the second terminal of the second transistor T2 is connected to the second node N2.

The reset module 13 includes a third transistor T3. The control terminal of the third transistor T3 is connected to the second driving signal R, the second terminal of the third transistor T3 is connected to the first node N1, and the first terminal of the third transistor T3 is connected to the reset signal int.

The compensation module 14 includes a fourth transistor T4 and a fifth transistor T5. The control terminal of the fourth transistor T4 is connected to the first node N1, the first terminal of the fourth transistor T4 is connected to the first power signal ELVDD, the second terminal of the fourth transistor T4 and the first terminal of the fifth transistor T5 are both connected to the Three-node N3 connection. The second end of the fifth transistor T5 is connected to the first node N1, and the control end of the fifth transistor T5 is connected to the third driving signal G.

The light emitting module 15 includes a sixth transistor T6 and a light emitting device D2. The control terminal of the sixth transistor T6 is connected to the first driving signal EM, and the first terminal of the sixth transistor T6 is connected to the third node N3. The second end of the sixth transistor T6 is connected to the anode of the light emitting device D2. The cathode of the light emitting device D2 is connected to the second power signal ELVSS.

It should be noted that the first transistor T1 is used to control the transmission of the data signal D. The second transistor T2 is used to control the transmission of the reference signal Ref. The third transistor T3 is used to control the transmission of the reset signal int. The fourth transistor T4 is used to determine the driving current of the pixel driving circuit 1. The fifth transistor T5 is used to control the on-off of the second terminal and the control terminal of the fourth transistor T4. The sixth transistor T6 is used to transmit the driving current from the fourth transistor T4 to the light emitting device D2.

Please refer to FIG. 3. FIG. 3 is a timing diagram of driving signals of the pixel driving circuit provided by this application. It should be noted that the first driving signal EM, the second driving signal R, and the third driving signal G are all provided by an external timing controller. As shown in FIGS. 2 and 3, the driving timing of the pixel driving circuit 1 includes: a reset phase t1, a compensation phase t2, and a light-emitting phase t3. In the reset stage t1, the first terminal (that is, the first node N1) and the second terminal (that is, the second node N2) of the storage capacitor C1 are reset. In the compensation phase t2, the threshold voltage of the fourth transistor T4 is captured and stored in the storage capacitor C1. In the light-emitting phase t3, the pixel driving circuit 1 generates a driving current and supplies it to the light-emitting device D2 for driving the light-emitting display of the light-emitting device D2.

First, please continue to refer to FIG. 3 in conjunction with FIG. 4. FIG. 4 is a schematic diagram of the current path of the pixel driving circuit provided by this application in the reset phase under the driving timing shown in FIG. 3. In the reset phase t1, the first driving signal EM is a high-level signal, the second driving signal R is a low-level signal, and the third driving signal G is a high-level signal. Therefore, in the first aspect, the third transistor turns on T3, the reset signal int is transmitted to the first node N1, that is, the reset voltage Vint of the reset signal int is transmitted to the first end of the storage capacitor C1, thereby completing the storage capacitor C1 The first end is reset. In the second aspect, the first transistor T1 is turned on, the data signal D is transmitted to the second node N2, that is, the data voltage Vd of the data signal D is transmitted to the second end of the storage capacitor C1, thereby completing the second end of the storage capacitor C1. Terminal reset. In the third aspect, the second transistor T2, the fourth transistor T4, the fifth transistor T5, and the sixth transistor T6 are turned off.

Then, please continue to refer to FIG. 3 in conjunction with FIG. 5, which is a schematic diagram of the current path of the pixel driving circuit provided by this application in the compensation stage under the driving timing shown in FIG. In the compensation stage t2, the first driving signal EM is a high-level signal, the second driving signal R is a high-level signal, and the third driving signal G is a low-level signal. The second transistor T2, the third transistor T3, and the sixth transistor T6 are turned off. At this time, the first driving signal EM continues to maintain a high level signal, the first transistor T1 is turned on, and the data voltage Vd of the data signal D is transmitted to the second node N2 through the first transistor T1, so that the voltage of the second node N2 is Vd, that is, the voltage at the second end of the storage capacitor C1 at this time is Vd. The third driving signal is a low level signal, the fourth transistor T4 and the fifth transistor T5 are turned on, and the first power signal ELVDD charges the storage capacitor C1 through the fourth transistor T4 and the fifth transistor T5, that is, the first power signal ELVDD The first power supply voltage Vdd charges the storage capacitor C1 through the fourth transistor T4 and the fifth transistor T5 until the fourth transistor T4 turns off when the voltage difference between its control terminal and the first terminal is equal to its threshold voltage Vth, and the fourth transistor The potential of the T4 control terminal is Vdd-|Vth|, that is, the potential of the first terminal of the storage capacitor C1 at this time is Vdd-|Vth|.

Finally, please continue to refer to FIG. 3 in conjunction with FIG. 6. FIG. 6 is a schematic diagram of the current path of the pixel driving circuit provided by this application in the light-emitting phase under the driving timing shown in FIG. 3. In the light-emitting phase, the first driving signal EM is a low-level signal, the second driving signal R is a high-level signal, and the third driving signal G is a high-level signal. The first transistor T1, the third transistor T3, the fourth transistor T4, and the fifth transistor T5 are turned off. The second transistor T2 is turned on, the reference signal Ref is transmitted to the second node N2 through the second transistor T2, that is, the reference voltage Vref of the reference signal Ref is transmitted to the second node N2 through the second transistor T2, and the potential of the second node N2 is Is Vref, that is, the potential of the second end of the storage capacitor C1 is Vref.

Specifically, in the compensation phase t2, the potential of the first end of the storage capacitor C1 is Vdd-|Vth|, and the potential of the second end of the storage capacitor C1 is Vd. In the light-emitting stage t3, the potential of the second end of the storage capacitor C1 jumps to Vref. Due to the capacitive coupling effect, the potential of the first end of the storage capacitor C1 also changes accordingly. At this time, the potential of the first end of the storage capacitor C1 is Vdd-| Vth|-Vd+Vref. That is, the potential of the control terminal of the fourth transistor T4 is Vdd-|Vth|-Vd+Vref.

At this time, the potential of the first terminal (source terminal) of the fourth transistor T4 is Vdd, the potential of the control terminal (gate terminal) is Vdd-|Vth|-Vd+Vref, and the gate-source voltage Vgs=Vdd-(Vdd-| Vth|-Vd+Vref)=Vd+|Vth|-Vref. Therefore, the current flowing to the light-emitting device D2 can be obtained according to the following formula:

Among them, is the carrier mobility of the driving transistor T4, and is the aspect ratio of the fourth transistor T4. It can be seen from the above formula that the pixel driving circuit 1 eliminates the influence of the threshold voltage Vth of the fourth transistor T4 on the brightness uniformity of the AMOLED display, can compensate for the threshold voltage changes of the fourth transistor T4, and improve the uniformity of light emission of the light-emitting device, thereby improving Picture quality, and brightness can be controlled by adjusting Vref.

In the pixel driving circuit provided by the present application, when the gate control signal is turned on, the gate and drain of the fourth transistor T4 are connected through the fifth transistor T5, so that the drain of the fourth transistor T4 transmits the first power signal together with the fourth transistor The threshold voltage of T4 is applied to the first end of the storage capacitor C1 together to cancel the threshold voltage of the fourth transistor T4. Therefore, the threshold voltage change of the fourth transistor T4 can be compensated, and the light emission uniformity of the light emitting device D2 is improved, thereby Improve picture quality. In addition, the structural design of the pixel driving circuit 1 provided by the present application is simple, which can improve the manufacturing yield of the pixel driving circuit.

The application also provides a display panel, which includes a pixel driving circuit 1. For the specific structure of the pixel driving circuit 1, please refer to the previous embodiment, which will not be repeated here.

The pixel driving circuit and the display panel provided by the embodiments of the present application are described in detail above. Specific examples are used to describe the principles and implementations of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of the application, there will be changes in the specific implementation and the scope of application. In summary, the content of this specification should not be construed as a limitation of the application.

Claims (20)

A pixel driving circuit includes: a storage capacitor, a first receiving module, a second receiving module, a resetting module, a compensation module, and a light emitting module; the first receiving module, the second receiving module, the resetting module, and The compensation modules are all connected to the storage capacitor, and the compensation module is connected to the light emitting module; Wherein, the first end of the storage capacitor is connected to a first node, and the second end of the storage capacitor is connected to a second node; The first receiving module is configured to receive a first driving signal and transmit the data signal to the second node under the control of the first driving signal; The second receiving module is configured to receive a first driving signal and transmit a reference signal to the second node under the control of the first driving signal; The reset module is configured to receive the second drive signal and transmit a reset signal to the first node under the control of the second drive signal; The compensation module is configured to receive a third drive signal and perform threshold voltage compensation under the control of the third drive signal; The light emitting module is used for receiving a first driving signal and emitting light under the control of the first driving signal. The pixel driving circuit according to claim 1, wherein the first receiving module comprises: a first transistor; The control terminal of the first transistor is connected to the first drive signal, the first terminal of the first transistor is connected to the data signal, and the second terminal of the first transistor is connected to the second node. 3. The pixel driving circuit according to claim 2, wherein the second receiving module comprises: a second transistor; The control terminal of the second transistor is connected to the first driving signal, the first terminal of the second transistor is connected to the reference signal, and the second terminal of the second transistor is connected to the second node. The pixel driving circuit according to claim 3, wherein the reset module comprises: a third transistor: The control terminal of the third transistor is connected to the second drive signal, the first terminal of the third transistor is connected to the reset signal, and the second terminal of the third transistor is connected to the first node. 4. The pixel driving circuit according to claim 4, wherein the compensation module comprises: a fourth transistor and a fifth transistor; The control terminal of the fourth transistor is connected to the first node, the first terminal of the fourth transistor is connected to a first power signal, and the second terminal of the fourth transistor and the first terminal of the fifth transistor are connected. The terminals are all connected to the third node, the second terminal of the fifth transistor is connected to the first node, and the control terminal of the fifth transistor is connected to the third drive signal. 5. The pixel driving circuit according to claim 5, wherein the light emitting module comprises: a sixth transistor and a light emitting device; The control terminal of the sixth transistor is connected to the first drive signal, the first terminal of the sixth transistor is connected to the third node, and the second terminal of the sixth transistor is connected to the anode of the light emitting device. Connected, the cathode of the light-emitting device is connected with the second power signal. 7. The pixel driving circuit according to claim 6, wherein the first transistor is used to control the transmission of the data signal; the second transistor is used to control the transmission of the reference signal; the third transistor is used to Control the transmission of the reset signal; the fourth transistor is used to determine the driving current of the pixel drive circuit; the fifth transistor is used to control the on and off of the second terminal and the control terminal of the second transistor; the sixth The transistor is used to transmit the driving current from the fourth transistor to the light emitting device. 5. The pixel driving circuit according to claim 5, wherein the first transistor is an NMOS transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor The transistors are all PMOS tubes. 8. The pixel driving circuit according to claim 8, wherein the driving timing of the pixel driving circuit comprises: Reset stage, reset the first end and the second end of the storage capacitor; In the compensation phase, the threshold voltage of the fourth transistor is captured and stored in the storage capacitor; In the light-emitting stage, the pixel driving circuit generates a driving current and supplies it to the light-emitting device for driving the light-emitting display of the light-emitting device. 9. The pixel driving circuit according to claim 9, wherein in the reset phase, the first driving signal is a high-level signal, the second driving signal is a low-level signal, and the third driving signal is High level signal, the third transistor is turned on, the first transistor is turned on, the data signal is transmitted to the second terminal of the storage capacitor, and the reset signal is transmitted to the first terminal of the storage capacitor. end. 9. The pixel drive circuit according to claim 9, wherein, in the compensation stage, the first drive signal is a high-level signal, the second drive signal is a high-level signal, and the third drive signal is Low level signal, the fourth transistor and the fifth transistor are turned on, and the first power signal charges the storage capacitor through the fourth transistor and the fifth transistor until the fourth transistor is under its control. When the voltage difference between the terminal and the first terminal is equal to its threshold voltage, it will be cut off. 9. The pixel drive circuit according to claim 9, wherein, in the light-emitting phase, the first drive signal is a low-level signal, the second drive signal is a high-level signal, and the third drive signal is With a high-level signal, the second transistor is turned on, and the reference signal is transmitted to the second node through the second transistor; the sixth transistor is turned on, and the light emitting device emits light. A pixel driving circuit includes: a storage capacitor, a first receiving module, a second receiving module, a resetting module, a compensation module, and a light emitting module; the first receiving module, the second receiving module, the resetting module, and The compensation modules are all connected to the storage capacitor, and the compensation module is connected to the light emitting module; Wherein, the compensation module is used for receiving a third driving signal and performing threshold voltage compensation under the control of the third driving signal. The pixel driving circuit according to claim 13, wherein the first receiving module comprises: a first transistor; The control terminal of the first transistor is connected to the first drive signal, the first terminal of the first transistor is connected to the data signal, and the second terminal of the first transistor is connected to the second node. The pixel driving circuit according to claim 14, wherein the second receiving module comprises: a second transistor; The control terminal of the second transistor is connected to the first driving signal, the first terminal of the second transistor is connected to the reference signal, and the second terminal of the second transistor is connected to the second node. The pixel driving circuit according to claim 15, wherein the reset module comprises: a third transistor: The control terminal of the third transistor is connected to the second drive signal, the first terminal of the third transistor is connected to the reset signal, and the second terminal of the third transistor is connected to the first node. The pixel driving circuit according to claim 16, wherein the compensation module comprises: a fourth transistor and a fifth transistor; The control terminal of the fourth transistor is connected to the first node, the first terminal of the fourth transistor is connected to a first power signal, and the second terminal of the fourth transistor and the first terminal of the fifth transistor are connected. The terminals are all connected to the third node, the second terminal of the fifth transistor is connected to the first node, and the control terminal of the fifth transistor is connected to the third drive signal. The pixel driving circuit according to claim 17, wherein the light emitting module comprises: a sixth transistor and a light emitting device; The control terminal of the sixth transistor is connected to the first drive signal, the first terminal of the sixth transistor is connected to the third node, and the second terminal of the sixth transistor is connected to the anode of the light emitting device. Connected, the cathode of the light-emitting device is connected with the second power signal. The pixel driving circuit according to claim 18, wherein the first transistor is used to control the transmission of the data signal; the second transistor is used to control the transmission of the reference signal; the third transistor is used to Control the transmission of the reset signal; the fourth transistor is used to determine the driving current of the pixel drive circuit; the fifth transistor is used to control the on and off of the second terminal and the control terminal of the second transistor; the sixth The transistor is used to transmit the driving current from the fourth transistor to the light emitting device. A display panel includes a pixel drive circuit. The pixel drive circuit includes a storage capacitor, a first receiving module, a second receiving module, a reset module, a compensation module, and a light emitting module; the first receiving module, the second The receiving module, the reset module and the compensation module are all connected to the storage capacitor, and the compensation module is connected to the light emitting module; Wherein, the compensation module is used for receiving a third driving signal and performing threshold voltage compensation under the control of the third driving signal.

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